Abstract:
The invention disclosed a three dimensional angle measuring device for measuring and correcting horizontal, vertical and other angle states of an object. The invention includes a housing, a key module, a power module, a display module, an information processing module, a buzzing module and a sensor module, wherein the power module is connected with the information processing module and the key module, the information processing module is connected with the key module, the display module, the information processing module, the buzzing module and the sensor module. The invention has characteristics of high measurement precision, easy operation and more functions. When in use, it just needs to place the invention on a test plane, then the present angle can be displayed precisely, and the precision can reach ±0.10°; the invention also has functions such as calibration, locking, resetting and calculator, thus avoiding daily tedious operation.

Description:
CROSS-REFERENCE TO RELATED APPLICATION 
       [0001]    The present patent application claims benefit of Chinese patent application No. 201410487585.4 filed on Sep. 23, 2014, the entire contents of which are incorporated by reference. 
       TECHNICAL FIELD 
       [0002]    The invention belongs to the field of measuring tools and technology, relates to a three dimensional angle measuring device for measuring and correcting horizontal, vertical and other angle state with high precision. 
       BACKGROUND  
       [0003]    It is needed to measure and correct horizontal, vertical and other angle states of an object during operation processes such as house decoration, maintenance, item installation, etc., the existing pointer-type angle measuring device mostly relies on reading by naked eyes, and it needs time to analyze in the work requiring higher precision, and there are greater measurement errors, which brings inconvenience to the work. 
       SUMMARY 
       [0004]    Aiming at existing inconvenience brought by reading the pointer by naked eyes, the invention provides a liquid crystal digital display device with high precision. It just needs to place the device on a test plane, then the present angle can be displayed precisely, and the precision can reach ±0.10°; the invention also has functions such as calibration, locking, resetting and calculator in the function test, thus avoiding daily tedious operation. 
         [0005]    The technical scheme adopted in the invention is achieved as follows: a three dimensional angle measuring device, includes a housing, a key module, a power module, a display module, an information processing module, a buzzing module and a sensor module, wherein the power module is connected with the information processing module and the key module, the information processing module is connected with the key module, the display module, the information processing module, the buzzing module and the sensor module. 
         [0006]    Further, the power module includes a relay, a voltage regulator module and a power circuit. 
         [0007]    Further, the key module includes angle measurement function keys, calculator keys and a keying circuit. 
         [0008]    In the three dimensional angle measuring device, two horizontal datum planes are set on the housing, wherein, a first horizontal datum plane is on the left side of the housing, and a second horizontal datum plane is on the back of the housing. 
         [0009]    Further, in the one three dimensional angle measuring device, the angle measurement function keys and the calculator keys are conductive keys. 
         [0010]    Further, the display module includes a first liquid crystal display window, a second liquid crystal display window, a display module circuit, a first liquid crystal display drive integrated chip and a second liquid crystal display drive integrated chip. 
         [0011]    Further, the buzzing module includes a buzzer and a buzzing module circuit. 
         [0012]    Further, the sensor module includes a sensor module circuit and a sensor chip. 
         [0013]    In the three dimensional angle measuring device, the information processing module includes a microcontroller U 3  and a control circuit, wherein the control circuit includes a crystal oscillator Y, a switch K, a resistor  3  R 3 , a resistor  4  R 4 , a resistor  5  R 5 , a resistor  6  R 6 , a capacitor  6  C 6 , a capacitor  7  C 7 , a capacitor  8  C 8 , a capacitor  9  C 9 , a capacitor  14  C 14 , a capacitor  15  C 15 , a capacitor  16  C 16  and a capacitor  17  C 17 , wherein one end of the switch K and one end of the capacitor  9  C 9  are connected with the anode output VDD of the circuit, the other end of the capacitor  9  C 9  is connected with the power cathode GND of the circuit, and the other end of the switch K is connected with the pin  1  of the microcontroller U 3 . One end of the resistor  5  R 5  is connected with the anode input VBAT in the circuit, the other end of the resistor  5  R 5  is connected with one end of the resistor  6  R 6  and the pin  2  of the microcontroller U 3 , and the other end of the resistor  6  R 6  is connected to the cathode node AGND of the circuit. The pin  14  of the microcontroller U 3  and one end of the resistor  6  R 6  are connected to the anode output VDD of the circuit, and the other end of the resistor  6  R 6  is connected with the pin  15  of the microcontroller U 3  and the cathode node AGND of the circuit; the pin  17  of the microcontroller U 3  is respectively connected with one end of the capacitor  14  C 14  and one end of the crystal oscillator Y, and the other end of the capacitor  14  C 14  is connected to the power cathode GND in the circuit. The pin  18  of the microcontroller U 3  is respectively connected with one end of the capacitor  15  C 15  and the other end of the crystal oscillator Y, the other end of the capacitor  15  C 15  is connected to the power cathode GND of the circuit, and the pin  21  of the microcontroller U 3  is connected with one end of the resistor  3  R 3 , the other end of the resistor  3  R 3  is connected to the power cathode GND of the circuit. The pin  23  of the microcontroller U 3  is respectively connected with one end of the resistor  4  R 4  and one end of the capacitor  16  C 16 , the other end of the resistor  4  R 4  and one end of the capacitor  17  C 17  are connected to the anode output VDD of the circuit, the other end of the capacitor  17  C 17  is connected to the power cathode GND of the circuit, and the other end of the capacitor  16  C 16  is connected with the pin  26  of the microcontroller U 3 . The pin  32  of the microcontroller U 3  and one end of the capacitor  7  C 7  are connected with the anode output VDD of the circuit, and the other end of the capacitor  7  C 7  is connected with the power cathode GND of the circuit. The pin  48  of the microcontroller U 3  and one end of the capacitor  8  C 8  are connected with the anode output VDD of the circuit, and the other end of the capacitor  8  C 8  is connected with the power cathode GND of the circuit. 
         [0014]    In the three dimensional angle measuring device, the power module includes a relay, a voltage regulator module U l  and a power circuit, wherein the power circuit includes a capacitor  1  C 1 , a capacitor  2  C 2 , a capacitor  3  C 3 , a capacitor  4  C 4 , a capacitor  5  C 5 , a voltage regulator module U 1 , a resistor  1  R 1 , a resistor  2  R 2 , a triode  1  Q 1  and a triode  2  Q 2 , wherein the triode  1  Q 1  is a MOS tube, and the capacitor  1  C 1 , the capacitor  4  C 4  and the capacitor  5  C 5  are electrolytic capacitors. The anode input VBAT node in the circuit is connected with the pin  1  of the relay J, the anode of the capacitor  1  C 1 , one end of the capacitor  2  C 2  and the pins  1  and  3  of the voltage regulator module U 1 . The cathode GND of the circuit is connected with the pin  2  of the relay J, the other end of the capacitor  1  C 1 , the other end of the capacitor  2  C 2 , the pin  2  of the voltage regulator module U 1 , one end of the capacitor  3  C 3  and the cathode of the capacitor  4  C 4 . The anode output VDD of the circuit is connected with the pin  5  of the voltage regulator module U 1 , the other end of the capacitor  3  C 3 , the anode of the capacitor  4  C 4 , one end of the resistor  1  R 1  and a source electrode of the triode  1  Q 1 . The other end of the resistor  1  R 1  is connected with a grid of the triode  1  Q 1  and a collector electrode of the triode  2  Q 2 , a drain electrode of the triode  1  Q 1  is connected with the anode output VCC of the circuit and the anode of the capacitor  5  C 5 , the cathode of the capacitor  5  C 5  is grounded, and a base electrode of the triode  2  Q 2  is connected with one end of the resistor  2  R 2 , an emitter electrode of the triode  2  Q 2  is connected to the cathode GND of the circuit, and the other end of the resistor  2  R 2  is connected to the pin  3  of the microcontroller U 3 . 
         [0015]    In the three dimensional angle measuring device, the key module includes angle measurement function keys, calculator keys and a keying circuit, wherein the total number of the angle measurement function keys and the calculator keys are 26, including: key  1  SW 1 -key  26  SW 26 . The keying circuit are as follows: key  1  SW 1 -key  26  SW 26  are arranged in a matrix form, wherein, ordered in row, one pin of key  1  SW 1 -key  5  SW 5  are connected to a network KS 0   1 , one pin of key  6  SW 6 -key  10  SW 10  are connected to a network KS 0   2 , one pin of key  11  SW 11 -key  15  SW 15  are connected to a network KS 0   3 , one pin of key  16  SW 16 -key  20  SW 20  are connected to a network KS 0   4 , one pin of key  21  SW 21 -key  25  SW 25  are connected to a network KS 0   5 , and one pin of key  26  SW 26  is connected to a network KS 0   6 ; and ordered in line, the other pin of key  1  SW 1 , key  6  SW 6 , key  11  SW 11 , key  16  SW 16 , key  21  SW 21  and key  26  SW 26  are connected to a network KS 11 , the other pin of key  2  SW 2 , key  7  SW 7 , key  12  SW 12 , key  17  SW 17  and key  22  SW 22  are connected to a network KS 12 , the other pin of key  3  SW 3 , key  8  SW 8 , key  13  SW 13 , key  18  SW 18  and key  23  SW 23  are connected to a network KS 13 , the other pin of key  4  SW 4 , key  9  SW 9 , key  14  SW 14 , key  19  SW 19  and key  24  SW 24  are connected to a network KS 14 , and the other pin of key  5  SW 5 , key  10  SW 10 , key  15  SW 15 , key  20  SW 20  and key  25  SW 25  are connected to a network KS 15 . Networks KS 11 -KS 15  are sequentially connected to the pins  4 ,  5 ,  6 ,  7  and  8  of the microcontroller U 3 , respectively. Networks KS 01 -KS 15  are sequentially connected to the pins  4 ,  5 ,  6 ,  7  and  8  of the microcontroller U 3 , respectively; and networks KS 01 -KS 06  are respectively connected to the pins  9 ,  10 ,  11 ,  12 ,  13  and  16  of the microcontroller U 3 . 
         [0016]    In the three dimensional angle measuring device, the sensor module includes a sensor chip U 2  and a sensor module circuit, wherein the sensor module circuit are as follows: pins  1  and  10  of the sensor chip U 2  are connected to the power anode output VCC, the pin  3  of the sensor chip U 2  is connected to the pin  55  of the microcontroller U 3 , pins  4 ,  7  and  9  of the sensor chip U 2  are connected to the power cathode GND of the circuit, and the pin  5  of the sensor chip U 2  is connected to the pin  54  of the microcontroller U 3 , the pin  6  of the sensor chip 
         [0017]    U 2  is connected to the pin  53  of the microcontroller U 3 , and the pin  8  of the sensor chip U 2  is connected to the pin  19  of the microcontroller U 3 . 
         [0018]    Further, the sensor chip U 2  is a three-axis angle sensor. 
         [0019]    In the three dimensional angle measuring device, the display module includes a liquid crystal display LCD, a first liquid crystal display drive integrated chip U 4 , a second liquid crystal display drive integrated chip U 5  and a display module circuit, wherein the liquid crystal display LCD includes a first liquid crystal display window and a second liquid crystal display window, the display module circuit includes a capacitor  10  C 10 , a capacitor  11  C 11 , a capacitor  12  C 12  and a capacitor  13  C 13 . Wherein, pins  1 - 4  of the liquid crystal display LCD are respectively connected to pins  37 ,  36 ,  35  and  34  of the microcontroller U 3 , the pin  5  of the liquid crystal display LCD is connected to one end of the capacitor  11  C 11  and the power cathode GND in the circuit. The pin  6  of the liquid crystal display LCD is connected to the other end of the capacitor  11  C 11  and the power anode output VCC, pins  7 - 10  of the liquid crystal display LCD are respectively connected to pins  64 ,  63 ,  62  and  61  of the microcontroller U 3 , the pin  15  of the liquid crystal display LCD is connected to the anode input VBAT node, pins  16 - 18  of the liquid crystal display LCD are respectively connected to pins  6 ,  5  and  4  of the first liquid crystal display drive integrated chip U 4 , pins  6  and  5  of the second liquid crystal display drive integrated chip U 5  are respectively connected to pins  19  and  20  of the liquid crystal display LCD. The pin  22  of the liquid crystal display LCD is connected to the pin  33  of the microcontroller U 3 , pins  23 - 30  of the liquid crystal display LCD are respectively connected to pins  46 ,  45 ,  44 ,  43 ,  42 ,  41 ,  40  and  39  of the microcontroller U 3 , the pin  31  of the liquid crystal display LCD is respectively connected to the pin  60  of the microcontroller U 3 , the pin  32  of the liquid crystal display LCD is connected to the power anode output VCC, the pin  33  of the liquid crystal display LCD and one end of the capacitor  13  C 13 , the other end of the capacitor  13  C 13  is connected to the power cathode GND of the circuit and the pin  34  of the liquid crystal display LCD, and pins  35 ,  36  and  37  of the liquid crystal display LCD are respectively connected to pins  29 ,  30  and  31  of the microcontroller U 3 . One end of the capacitor  10  C 10  is connected to the power anode output VCC and the pin  1  of the first liquid crystal display drive integrated chip U 4 , the other end of capacitor  10  C 10  is connected to the power cathode GND of the circuit and the pin  2  of the first liquid crystal display drive integrated chip U 4 , the pin  3  of the first liquid crystal display drive integrated chip U 4  is connected to the pin  3  of the second liquid crystal display drive integrated chip U 5  and the pin  59  of the microcontroller U 3 . One end of the capacitor  12  C 12  is connected to the power anode output VCC and the pin  1  of the second liquid crystal display drive integrated chip U 5 , and the other end of the capacitor  12  C 12  is connected to the power cathode GND of the circuit and the pin  2  of the second liquid crystal display drive integrated chip U 5 . 
         [0020]    In the three dimensional angle measuring device, the buzzing module includes a buzzer DZ and a buzzing module circuit, wherein the buzzing module circuit includes a triode  3  Q 3  and a resistor  7  R 7 , wherein, one end of the buzzer DZ is connected to the anode input VBAT node, the other end of the buzzer DZ is connected to the collector electrode of the triode  3  Q 3 , the emitter electrode of the triode  3  Q 3  is connected to the power cathode GND of the circuit, the base electrode of the triode  3  Q 3  is connected to one end of the resistor  7  R 7 , and the other end of the resistor  7  R 7  is connected to the pin  52  of the microcontroller U 3 . 
         [0021]    Compared to the existing pointer-type angle measuring device, a three dimensional angle measuring device of the invention has characteristics of high measurement precision, easy operation and more functions. 
     
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
         [0022]      FIG. 1  is an appearance representation of the three dimensional angle measuring device of the invention. 
           [0023]      FIG. 2  is a structural representation of the three dimensional angle measuring device of the invention. 
           [0024]      FIG. 3  is a schematic diagram of measurement when the first horizontal datum plane of the three dimensional angle measuring device of the invention is upward. 
           [0025]      FIG. 4  is a schematic diagram of measurement when the second horizontal datum plane of the three dimensional angle measuring device of the invention is upward. 
           [0026]      FIG. 5  is a schematic diagram of the display interface of the first liquid crystal display window when the first horizontal datum plane of the three dimensional angle measuring device of the invention is upward. 
           [0027]      FIG. 6  is a schematic diagram of the display interface of the first liquid crystal display window when the second horizontal datum plane of the three dimensional angle measuring device of the invention is upward. 
           [0028]      FIG. 7  is a block diagram of the circuit of the three dimensional angle measuring device of the invention. 
           [0029]      FIG. 8  is a diagram of the control circuit in the circuit of the three dimensional angle measuring device. 
           [0030]      FIG. 9  is a diagram of the power circuit in the circuit of the three dimensional angle measuring device. 
           [0031]      FIG. 10  is a diagram of the keying circuit in the circuit of the three dimensional angle measuring device. 
           [0032]      FIG. 11  is a diagram of the sensor module circuit in the circuit of the three dimensional angle measuring device. 
           [0033]      FIG. 12  is a diagram of the display module circuit in the circuit of the three dimensional angle measuring device. 
           [0034]      FIG. 13  is a diagram of the buzzing module circuit in the circuit of the three dimensional angle measuring device. 
       
    
    
       [0035]    In  FIG. 1-FIG .  13 ,  1 : front cover;  2 : liquid crystal display fixing base;  3 : angle measurement function keys;  4 : liquid crystal display;  4   a : first liquid crystal display window;  4   b : second liquid crystal display window;  5 : calculator keys;  6 : first circuit board;  6   a : control circuit;  6   b : power circuit;  6   c : keying circuit;  6   d : sensor module circuit;  6   e : display module circuit;  6   f : buzzing module circuit;  7 : second circuit board;  8 : battery box;  9 : a rear cover;  10 : first horizontal datum plane; and  11 : second horizontal datum plane. 
         [0036]    U 1 : voltage regulator module; U 2 : sensor chip; U 3 : microcontroller; U 4 : liquid crystal display drive integrated chip  1 ; U 5 : liquid crystal display drive integrated chip  2 ; Y: crystal oscillator; K: switch; Q 1 -Q 3 : triode  1 -triode  3 ; J: relay; LCD: liquid crystal display; DZ: buzzer; R 1 -R 7 : resistor  1 -resistor  7 ;; C 1 -C 17 : capacitor  1 -capacitor  17 ; SW 1 -SW 26 : key  1 -key  26 . 
       DETAILED DESCRIPTION 
       [0037]    By reference to drawings, the invention will be further described by examples. 
         [0038]    Referring to  FIG. 1-FIG .  6 , a three dimensional angle measuring device, includes a housing, angle measurement function keys  3 , a liquid crystal display  4 , calculator keys  5  and circuit boards of the electronic circuit, wherein, the housing consists of a front cover  1  and a rear cover  9 , a first liquid crystal display window  4   a  and a second liquid crystal display window  4   b  are set on the front cover  1 . The first liquid crystal display window  4   a  is used for displaying inclination angle state of an object to be measured, and the second liquid crystal display window  4   b  is used for displaying calculation result of the calculator. Circuit boards of the electronic circuit include a first circuit board  6  and a second circuit board  7 . The first circuit board  6  and the second circuit board  7  are fixed on the front cover  1 , and the second circuit board  7  is connected with the first circuit board  6  by a lead. The liquid crystal display  4  is fixed on the front cover  1  through the liquid crystal display fixing base  2  and connected with the first circuit board  6  by a lead. The calculator keys  5  are set on the first circuit board  6  and connected with the circuit of the first circuit board  6 . The angle measurement function keys  3  are set on the second circuit board  7  and connected with the circuit of the second circuit board  7 . Two horizontal datum planes are set on the housing, wherein, the first horizontal datum plane  10  is on the left side of the housing, and the second horizontal datum plane  11  is on the back of the housing. The angle measurement function keys  3  and the calculator keys  5  are conductive keys. 
         [0039]    Wherein, the angle measurement function keys  3 , the calculator keys  5  and the keying circuit  6   c  constitute the key module of the three dimensional angle measuring device. The relay J, the voltage regulator module U 1  and the power circuit  6   b  constitute the power module of the three dimensional angle measuring device. The liquid crystal display window  4   a , the second liquid crystal display window  4   b , the display module circuit  6   e , the first liquid crystal display drive integrated chip U 4  and the second liquid crystal display drive integrated chip U 5  constitute the display module of the three dimensional angle measuring device; the microcontroller U 3  and the control circuit  6   a  constitute the information processing module of the three dimensional angle measuring device. The buzzer DZ and the buzzing module circuit  6   f  constitute the buzzing module of the three dimensional angle measuring device; and the sensor module circuit  6   d  and the sensor chip U 2  constitute the sensor module of the three dimensional angle measuring device. 
         [0040]    When the first horizontal datum plane  10  of the three dimensional angle measuring device is downward, angle state of the object in Z axis can be measured; when the second horizontal datum plane  11  of the three dimensional angle measuring device is downward, angle states of the object in X and Y axes can be measured. 
         [0041]    When the first horizontal datum plane  10  of the three dimensional angle measuring device is downward, the first liquid crystal display window  4   a  on the front cover  1  displays the inclination state of the first horizontal datum plane  10  of the three dimensional angle measuring device around the Z axis. When the first horizontal datum plane  10  of the three dimensional angle measuring device has different inclination angle, the interface scale and reading value will incline along with the first horizontal datum plane  10 , while the pointer and the semicircle representing the level bubble as well as three small arrows always keep the space position unchanged, now the scale pointed to by the pointer is the inclination angle of the first horizontal datum plane  10 . 
         [0042]    When the second horizontal datum plane  11  of the three dimensional angle measuring device is downward, the first liquid crystal display window  4   a  on the front cover  1  displays the inclination state of the second horizontal datum plane  10  of the three dimensional angle measuring device around the X and Y axes. When the X and Y axes alone or both have different inclination angles, the interface scale and the central cross coordinate of the first liquid crystal display window  4   a  keep still, while the central dot and two concentric circles representing the universal level bubble as well as the reference cross curve taking the dot center as the coordinate and the arrow indicating the inclination direction move along the inclination direction of the second horizontal datum plane, the direction pointed to by the arrow is the peak of the inclination angle, and the precise value of the inclination angle is displayed on the arrow. 
         [0043]    The angle measurement function keys  3  set on the three dimensional angle measuring device has functions of startup and shutdown, self-calibration of measurement datum, keeping measurement values and absolute measurement (taking inclined plane of the object as 0° datum). 
         [0044]    When in use, the three dimensional angle measuring device enters the working state immediately after the power switch is turn on. When only the inclination angle of the object in one direction needs to be measured, the first horizontal datum plane  10  of the three dimensional angle measuring device is placed downwards on the plane to be measured, now the first liquid crystal display window  4   a  displays the angle pointed to by the pointer and the displayed value is the inclination angle of the measured object relative to the horizontal plane. When the inclination angles of the object in two directions need to be measured, the second horizontal datum plane  11  of the three dimensional angle measuring device is placed downwards on the plane to be measured, now the first liquid crystal display window  4   a  displays direction of movement of the universal level bubble, the direction pointed to by the arrow is the inclination direction of the measured object relative to the horizontal plane, and inclination value is also displayed ahead of the arrow. 
         [0045]    Referring to  FIG. 7-FIG .  13 , a three dimensional angle measuring device is provided, wherein the electronic circuit in the three dimensional angle measuring device includes a control circuit  6   a , a power circuit  6   b , a keying circuit  6   c , a sensor module circuit  6   d , a display module circuit  6   e  and a buzzing module circuit  6   f.    
         [0046]    The information processing module includes a microcontroller U 3  and a control circuit  6   a , wherein the control circuit  6   a  includes a crystal oscillator Y, a switch K, a resistor  3  R 3 , a resistor  4  R 4 , a resistor  5  R 5 , a resistor  6  R 6 , a capacitor  6  C 6 , a capacitor  7  C 7 , a capacitor  8  C 8 , a capacitor  9  C 9 , a capacitor  14  C 14 , a capacitor  15  C 15 , a capacitor  16  C 16  and a capacitor  17  C 17 , wherein one end of the switch K and one end of the capacitor  9  C 9  are connected with an anode output VDD of the circuit, the other end of the capacitor  9  C 9  is connected with a power cathode GND of the circuit, and the other end of the switch K is connected with the pin  1  of the microcontroller U 3 . One end of the resistor  5  R 5  is connected with the anode input VBAT the circuit, the other end of the resistor  5  R 5  is connected with one end of the resistor  6  R 6  and the pin  2  of the microcontroller U 3 , and the other end of the resistor  6  R 6  is connected to the cathode node AGND of the circuit. The pin  14  of the microcontroller U 3  and one end of the capacitor  6  C 6  are connected to the anode output VDD of the circuit, and the other end of the capacitor  6  C 6  is connected with the pin  15  of the microcontroller U 3  and the cathode node AGND of the circuit. The pin  17  of the microcontroller U 3  is respectively connected with one end of the capacitor  14  C 14  and one end of the crystal oscillator Y, and the other end of the capacitor  14  C 14  is connected to the power cathode GND of the circuit. The pin  18  of the microcontroller U 3  is respectively connected with one end of the capacitor  15  C 15  and the other end of the crystal oscillator Y, the other end of the capacitor  15  C 15  is connected to the power cathode GND in the circuit. The pin  21  of the microcontroller U 3  is connected with one end of the resistor  3  R 3 , the other end of the resistor  3  R 3  is connected to the power cathode GND of the circuit, the pin  23  of the microcontroller U 3  is respectively connected with one end of the resistor  4  R 4  and one end of the capacitor  16  C 16 . The other end of the resistor  4  R 4  and one end of the capacitor  17  C 17  are connected to the anode output VDD of the circuit, the other end of the capacitor  17  C 17  is connected to the power cathode GND of the circuit, and the other end of the capacitor  16  C 16  is connected with the pin  26  of the microcontroller U 3 . The pin  32  of the microcontroller U 3  and one end of the capacitor  7  C 7  are connected with the anode output VDD in the circuit, and the other end of the capacitor  7  C 7  is connected with the power cathode GND of the circuit. The pin  48  of the microcontroller U 3  and one end of the capacitor  8  C 8  are connected with the anode output VDD of the circuit, and the other end of the capacitor  8  C 8  is connected with the power cathode GND of the circuit. 
         [0047]    The power module includes a relay J, a voltage regulator module U l  and a power circuit  6   b , wherein the power circuit includes a capacitor  1  C 1 , a capacitor  2  C 2 , a capacitor  3  C 3 , a capacitor  4  C 4 , a capacitor  5  C 5 , a resistor  1  R 1 , a resistor  2  R 2 , a triode  1  Q 1  and a triode  2  Q 2 . Wherein the triode  1  Q 1  is a MOS tube, and the capacitor  1  C 1 , the capacitor  4  C 4  and the capacitor  5  C 5  are electrolytic capacitors. The anode input VBAT node of the circuit is connected with the pin  1  of the relay J, the anode of the capacitor  1  C 1 , one end of the capacitor  2  C 2  and pins  1  and  3  of the voltage regulator module U 1 . The cathode GND of the circuit is connected with the pin  2  of the relay J, the other end of the capacitor  1  C 1 , the other end of the capacitor  2  C 2 , the pin  2  of the voltage regulator module U 1 , one end of the capacitor  3  C 3  and the cathode of the capacitor  4  C 4 . The anode output VDD of the circuit is connected with the pin  5  of the voltage regulator module U 1 , the other end of the capacitor  3  C 3 , the anode of the capacitor  4  C 4 , one end of the resistor  1  R 1  and a source electrode of the triode  1  Q 1 . The other end of the resistor  1  R 1  is connected with a grid of the triode  1  Q 1  and a collector electrode of the triode  2  Q 2 , a drain electrode of the triode  1  Q 1  is connected with the anode output VCC of the circuit and the anode of the capacitor  5  C 5 . The cathode of the capacitor  5  C 5  is grounded. A base electrode of the triode  2  Q 2  is connected with one end of the resistor  2  R 2 . An emitter electrode of the triode  2  Q 2  is connected to the cathode GND of the circuit, and the other end of the resistor  2  R 2  is connected to the pin  3  of the microcontroller U 3 . 
         [0048]    The key module includes angle measurement function keys  3 , calculator keys  5  and a keying circuit  6   c , wherein the total number of the angle measurement function keys  3  and the calculator keys  5  are  26 , including: key  1  SW 1 -key  26  SW 26 . The keying circuit are as follows: key  1  SW 1 -key  26  SW 26  are arranged in a matrix form, wherein, ordered in row, one pin of key  1  SW 1 -key  5  SW 5  are connected to a network KS 0   1 , one pin of key  6  SW 6 -key  10  SW 10  are connected to a network KS 0   2 , one pin of key  11  SW 11 -key  15  SW 15  are connected to a network KS 0   3 , one pin of key  16  SW 16 -key  20  SW 20  are connected to a network KS 0   4 , one pin of key  21  SW 21 -key  25  SW 25  are connected to a network KS 0   5 , and one pin of key  26  SW 26  is connected to a network KS 0   6 ; and ordered in line, the other pin of key  1  SW 1 , key  6  SW 6 , key  11  SW 11 , key  16  SW 16 , key  21  SW 21  and key  26  SW 26  are connected to a network KS  11 , the other pin of key  2  SW 2 , key  7  SW 7 , key  12  SW 12 , key  17  SW 17  and key  22  SW 22  are connected to a network KS 12 , the other pin of key  3  SW 3 , key  8  SW 8 , key  13  SW 13 , key  18  SW 18  and key  23  SW 23  are connected to a network KS 13 , the other pin of key  4  SW 4 , key  9  SW 9 , key  14  SW 14 , key  19  SW 19  and key  24  SW 24  are connected to a network KS 14 , and the other pin of key  5  SW 5 , key  10  SW 10 , key  15  SW 15 , key  20  SW 20  and key  25  SW 25  are connected to a network KS 15 . Networks KS 11 -KS 15  are sequentially connected to the pins  4 ,  5 ,  6 ,  7  and  8  of the microcontroller U 3 , respectively; networks KS 01 -KS 15  are sequentially connected to the pins  4 ,  5 ,  6 ,  7  and  8  of the microcontroller U 3 , respectively; and networks KS 01 -KS 06  are respectively connected to the pins  9 ,  10 ,  11 ,  12 ,  13  and  16  of the microcontroller U 3 . 
         [0049]    The sensor module includes a sensor chip U 2  and a sensor module circuit  6   d , wherein the sensor module circuit are as follows: pins  1  and  10  of the sensor chip U 2  are connected to the power anode output VCC, the pin  3  of the sensor chip U 2  is connected to the pin  55  of the microcontroller U 3 , pins  4 ,  7  and  9  of the sensor chip U 2  are connected to the power cathode GND of the circuit, the pin  5  of the sensor chip U 2  is connected to the pin  54  of the microcontroller U 3 , the pin  6  of the sensor chip U 2  is connected to the pin  53  of the microcontroller U 3 , and the pin  8  of the sensor chip U 2  is connected to the pin  19  of the microcontroller U 3 . 
         [0050]    The sensor chip U 2  is a three-axis angle sensor, and an internal collector can collect analog quantities in X, Y and Z axes direction after the three-axis angle sensor U 2  is turned over, and the analog quantities are converted to digital quantities by an internal converter, for measuring angles. 
         [0051]    The display module includes a liquid crystal display LCD, a first liquid crystal display drive integrated chip U 4 , a second liquid crystal display drive integrated chip U 5  and a display module circuit  6   e . Wherein the liquid crystal display LCD includes a first liquid crystal display window  4   a  and a second liquid crystal display window  4   b , the display module circuit includes a capacitor  10  C 10 , a capacitor  11  C 11 , a capacitor  12  C 12  and a capacitor  13  C 13 ; wherein, pins  1 - 4  of the liquid crystal display LCD are respectively connected to pins  37 ,  36 ,  35  and  34  of the microcontroller U 3 , the pin  5  of the liquid crystal display LCD is connected to one end of the capacitor  11  C 11  and the power cathode GND of the circuit, the pin  6  of the liquid crystal display LCD is connected to the other end of the capacitor  11  C 11  and the power anode output VCC, pins  7 - 10  of the liquid crystal display LCD are respectively connected to pins  64 ,  63 ,  62  and  61  of the microcontroller U 3 , the pin  15  of the liquid crystal display LCD is connected to the anode input VBAT node, pins  16 - 18  of the liquid crystal display LCD are respectively connected to pins  6 ,  5  and  4  of the first liquid crystal display drive integrated chip U 4 , pins  6  and  5  of the second liquid crystal display drive integrated chip U 5  are respectively connected to pins  19  and  20  of the liquid crystal display LCD, the pin  22  of the liquid crystal display LCD is connected to the pin  33  of the microcontroller U 3 , pins  23 - 30  of the liquid crystal display LCD are respectively connected to pins  46 ,  45 ,  44 ,  43 ,  42 ,  41 ,  40  and  39  of the microcontroller U 3 , the pin  31  of the liquid crystal display LCD is respectively connected to the pin  60  of the microcontroller U 3 , the pin  32  of the liquid crystal display LCD is connected to the power anode output VCC, the pin  33  of the liquid crystal display LCD and one end of the capacitor  13  C 13 , the other end of the capacitor  13  C 13  is connected to the power cathode GND of the circuit and the pin  34  of the liquid crystal display LCD, and pins  35 ,  36  and  37  of the liquid crystal display LCD are respectively connected to pins  29 ,  30  and  31  of the microcontroller U 3 . One end of the capacitor  10  C 10  is connected to the power anode output VCC and the pin  1  of the first liquid crystal display drive integrated chip U 4 , the other end of capacitor  10  C 10  is connected to the power cathode GND of the circuit and the pin  2  of the first liquid crystal display drive integrated chip U 4 , the pin  3  of the first liquid crystal display drive integrated chip U 4  is connected to the pin  3  of the second liquid crystal display drive integrated chip U 5  and the pin  59  of the microcontroller U 3 . One end of the capacitor  12  C 12  is connected to the power anode output VCC and the pin  1  of the second liquid crystal display drive integrated chip U 5 , and the other end of the capacitor  12  C 12  is connected to the power cathode GND in the circuit and the pin  2  of the second liquid crystal display drive integrated chip U 5 . 
         [0052]    The buzzing module includes a buzzer DZ and a buzzing module circuit  6   f , wherein the buzzing module circuit includes a triode  3  Q 3  and a resistor  7  R 7 , wherein, one end of the buzzer DZ is connected to the anode input VBAT node, the other end of the buzzer DZ is connected to the collector electrode of the triode  3  Q 3 , the emitter electrode of the triode  3  Q 3  is connected to the power cathode GND of the circuit, the base electrode of the triode  3  Q 3  is connected to one end of the resistor  7  R 7 , and the other end of the resistor  7  R 7  is connected to the pin  52  of the microcontroller U 3 . 
         [0053]    Operating principles of the three dimensional angle measuring device are as follows: 
         [0054]    The three dimensional angle measuring device supplies power for the whole system by batteries, the sensor chip U 2  collects angle signals, the information processing module calculates the present angle and sends the present angle to the liquid crystal display LCD for displaying; during measurement, when the three dimensional angle measuring device rotates to 0°, 45° and 90°, the buzzer will sound, so as to prompt users.