Abstract:
The present invention relates to the technical field of energy monitoring system, and particularly to a bidirectional wireless electrical energy monitoring system which comprises a bidirectional wireless electrical energy monitoring apparatus and a bidirectional wireless electrical energy monitoring switchgear; the bidirectional wireless electrical energy monitoring apparatus comprises a first wireless bidirectional module for receiving a current signal from the bidirectional wireless electrical energy monitoring switchgear and transmitting a control signal to the bidirectional wireless electrical energy monitoring switchgear; the bidirectional wireless electrical energy monitoring switchgear comprises a second wireless bidirectional module for receiving the control signal from the bidirectional wireless electrical energy monitoring apparatus and transmitting the current signal of electrical equipment to the second wireless bidirectional module of the bidirectional wireless electrical energy monitoring apparatus; bidirectional wireless connection is realized between the bidirectional wireless electrical energy monitoring apparatus and the bidirectional wireless electrical energy monitoring switchgear through the first wireless bidirectional module and the second wireless bidirectional module. The present invention may realize the bidirectional signal transmission, bidirectional control and remote control between the bidirectional wireless electrical energy monitoring apparatus and the bidirectional wireless electrical energy monitoring switchgear.

Description:
FIELD OF THE INVENTION 
       [0001]    The present invention relates to the technical field of energy monitoring system, and particularly to a bidirectional wireless electrical energy monitoring system. The present invention is based on the Chinese Invention Patent Application No. 200910037128.4, filed Feb. 10, 2009, the content of which is incorporated herein by reference. 
       BACKGROUND OF THE INVENTION 
       [0002]    The electrical energy is one of the important energy sources, which is used widely in the industrial and agricultural production and daily life. Currently, as the energy sources are increasingly decreasing, energy saving becomes an important study task. Various methods have been taken to control the loss of electrical energy with respect to the transmission of power supply and the performance of energy saving of the electrical equipment and so on, and all of these energy saving measures have certain energy saving effect. 
         [0003]    Unidirectional wireless electrical energy monitoring system is a new energy saving monitoring system, which is mainly composed of a unidirectional wireless electrical energy monitoring apparatus and a unidirectional wireless electrical energy monitoring switchgear. The unidirectional wireless electrical energy monitoring apparatus typically includes a first microprocessor, a display module, a key module and a wireless unidirectional receiving module. The unidirectional wireless electrical energy monitoring switchgear typically includes a second microprocessor, a current induction module, a switch control circuit and a wireless unidirectional transmitting module. The unidirectional wireless electrical energy monitoring switchgear is connected to a socket corresponding to the electrical equipment and senses a corresponding current signal through the current induction module. This current signal is processed by the second microprocessor and after that transmitted to the wireless unidirectional transmitting module which then sends it to the wireless unidirectional receiving module of the unidirectional electrical energy monitoring apparatus, and after the processing by the first microprocessor the signal is transmitted to the display module and output from the display module to an external display screen for displaying the electrical energy parameters, such as the power of electrical equipment, the power consumption and real time, etc. Between such unidirectional wireless electrical energy monitoring apparatus of the unidirectional wireless electrical energy monitoring system and the unidirectional wireless electrical energy monitoring switchgear, only one-way signal transmission can be realized and bidirectional operation and control and remote control may not be implemented, which causes inconvenience for use and has considerable limitation. 
       SUMMARY OF THE INVENTION 
       [0004]    The object of the present invention is to provide a bidirectional wireless electrical energy monitoring system for overcoming the disadvantages in the prior art. Bidirectional signal transmission and bidirectional control and remote control may be realized by such bidirectional wireless electrical energy monitoring system. 
         [0005]    In order to realize the above object, the present invention is implemented by the technical solution as follows. The present invention includes a bidirectional wireless electrical energy monitoring apparatus and a bidirectional wireless electrical energy monitoring switchgear. The bidirectional wireless electrical energy monitoring apparatus includes a first microprocessor, a display module and a first key module, an input of the display module being connected to a display driving output of the first microprocessor, and an output of the first key module being connected to a key detection input of the first microprocessor. The bidirectional wireless electrical energy monitoring switchgear includes a second microprocessor, a current induction module and a switch control circuit, an output of the current induction module being connected to a current detection input of the second microprocessor, and an input of the switch control circuit being connected to a control output of the second microprocessor. The bidirectional wireless electrical energy monitoring apparatus also includes a first wireless bidirectional module for receiving a current signal from the bidirectional wireless electrical energy monitoring switchgear and transmitting a control signal to the bidirectional wireless electrical energy monitoring switchgear, the first wireless bidirectional module being connected to the first microprocessor. The bidirectional wireless electrical energy monitoring switchgear also includes a second wireless bidirectional module for receiving the control signal from the bidirectional wireless electrical energy monitoring apparatus and transmitting the current signal of electrical equipment to the second wireless bidirectional module of the bidirectional wireless electrical energy monitoring apparatus, the second wireless bidirectional module being connected to the second microprocessor. Bidirectional wireless connection is realized between the bidirectional wireless electrical energy monitoring apparatus and the bidirectional wireless electrical energy monitoring switchgear through the first wireless bidirectional module and the second wireless bidirectional module. 
         [0006]    The first wireless bidirectional module is composed of a radio frequency transceiver chip U 1 _ 1 , a crystal oscillator Y 1 _ 1 , an antenna J 1 _ 1 , capacitors C 1 _ 1 , C 1 _ 2 , C 1 _ 4 , C 1 _ 5  and inductances L 1 _ 1 , L 1 _ 2 , L 1 _ 3 . One end of the crystal oscillator Y 1 _ 1  is connected to the  9  pin of the radio frequency transceiver chip U 1 _ 1 , and the other end is grounded; one end of the capacitor C 1 _ 5  is connected to the 15 pin of the radio frequency transceiver chip U 1 _ 1 , and the other end is grounded; the inductance L 1 _ 1  is connected between the 12 pin and 13 pin of the radio frequency transceiver chip U 1 _ 1 , and the inductance L 1 _ 2  is connected between the 12 pin and 14 pin of the radio frequency transceiver chip U 1 _ 1 ; one end of the capacitor C 1 _ 1  is connected to the 13 pin of the radio frequency transceiver chip U 1 _ 1 , and the other end is grounded; one end of the capacitor C 1 _ 4  is connected to the 12 pin of the radio frequency transceiver chip U 1 _ 1 , the other end is connected to one end of the inductance L 1 _ 3 , and the other end of the inductance L 1 _ 3  is connected to the 13 pin of the radio frequency transceiver chip U 1 _ 1 ; one end of the capacitor C 1 _ 2  is connected to the intersection of the inductances L 1 _ 3  and C 1 _ 4 , and the other end is connected to the antenna J 1 _ 1 ; the 11 pin of the radio frequency transceiver chip U 1 _ 1  is a grounding pin which is grounded, the 14 pin of the radio frequency transceiver chip U 1 _ 1  is a power pin for providing power, and the 1-8 pins, 10 pin and 16 pin of the radio frequency transceiver chip U 1 _ 1  are connected to the first microprocessor. 
         [0007]    The first wireless bidirectional module uses IA4421 as the radio frequency transceiver chip U 1 _ 1 . 
         [0008]    The bidirectional wireless electrical energy monitoring apparatus further includes a clock and calendar module that is connected to the first microprocessor for configuration of the clock and calendar. 
         [0009]    The bidirectional wireless electrical energy monitoring apparatus further includes a first power source module which is composed of a first power input circuit and a first voltage regulator circuit. The input of the first power input circuit is connected to an external power source, the output of the first power input circuit is connected to the input of the first voltage regulator circuit, and the output of the first voltage regulator circuit is connected to the power inputs of the first microprocessor, the display module, the first key module, the first wireless bidirectional module and the clock and calendar module, respectively. 
         [0010]    The second wireless bidirectional module is composed of a radio frequency transceiver chip U 2 _ 1 , a crystal oscillator Y 2 _ 1 , an antenna J 2 _ 1 , capacitors C 2 _ 1 , C 2 _ 2 , C 2 _ 4 , C 2 _ 5  and inductances L 2 _ 1 , L 2 _ 2 , L 2 _ 3 . One end of the crystal oscillator Y 2 _ 1  is connected to the 9 pin of the radio frequency transceiver chip U 2 _ 1 , and the other end is grounded; one end of the capacitor C 2 _ 5  is connected to the 15 pin of the radio frequency transceiver chip U 2 _ 1 , and the other end is grounded; the inductance L 2 _ 1  is connected between the 12 pin and 13 pin of the radio frequency transceiver chip U 2 _ 1 , and the inductance L 2 _ 2  is connected between the 12 pin and 14 pin of the radio frequency transceiver chip U 2 _ 1 ; one end of the capacitor C 2 _ 1  is connected to the 13 pin of the radio frequency transceiver chip U 2 _ 1 , and the other end is grounded; one end of the capacitor C 2 _ 4  is connected to the 12 pin of the radio frequency transceiver chip U 2 _ 1 , the other end is connected to one end of the inductance L 2 _ 3 , and the other end of the inductance L 2 _ 3  is connected to the 13 pin of the radio frequency transceiver chip U 2 _ 1 ; one end of the capacitor C 2 _ 2  is connected to the intersection of the inductances L 2 _ 3  and C 2 _ 4 , and the other end is connected to the antenna J 2 _ 1 ; the 11 pin of the radio frequency transceiver chip U 2 _ 1  is a grounding pin which is grounded, the 14 pin of the radio frequency transceiver chip U 2 _ 1  is a power pin for providing power, and the 1-8 pins, 10 pin and 16 pin of the radio frequency transceiver chip U 2 _ 1  are connected to the second microprocessor. 
         [0011]    The second wireless bidirectional module uses IA4421 as the radio frequency transceiver chip U 2 _ 1 . 
         [0012]    The bidirectional wireless electrical energy monitoring switchgear further includes a second key module, an indicator circuit. The output of the second key module is connected to the key detection input of the second microprocessor, and the input of the indicator circuit is connected to the status output of the second microprocessor. 
         [0013]    The bidirectional wireless electrical energy monitoring switchgear further includes a second power source module which includes a second power input circuit, a rectifying circuit and a second voltage regulator circuit. The input of the second power input circuit is connected to an external power source, the output of the second power input circuit is connected to the AC input of the switch control circuit and the input of the rectifying circuit, respectively, the output of the rectifying circuit is connected to the AC input of the switch control circuit and the input of the second voltage regulator circuit, respectively, the output of the second voltage regulator circuit is connected to the DC inputs of the second microprocessor, the current induction module, the second wireless bidirectional module, the second key module and the indicator circuit, respectively. 
         [0014]    The second power source module further includes a voltage detection circuit. The input of the voltage detection circuit is connected to the output of the second power input circuit, and the output of the voltage detection circuit is connected to the voltage detection input of the second microprocessor for detecting the input voltage of the power source. 
         [0015]    The present invention has beneficial effects as follows. The bidirectional wireless electrical energy monitoring system according to the present invention includes a bidirectional wireless electrical energy monitoring apparatus and a bidirectional wireless electrical energy monitoring switchgear. The first wireless bidirectional module of the bidirectional wireless electrical energy monitoring apparatus may receive a current signal from the bidirectional wireless electrical energy monitoring switchgear and transmitting a control signal to the bidirectional wireless electrical energy monitoring switchgear; the second wireless bidirectional module the bidirectional wireless electrical energy monitoring switchgear may receive the control signal from the bidirectional wireless electrical energy monitoring apparatus or transmit the current signal of electrical equipment to the bidirectional wireless electrical energy monitoring apparatus. As can be seen from the above technical solution, the first wireless bidirectional module of the present invention matches the second wireless bidirectional module, which may implement bidirectional signal transmission, therefore, the present invention may realize the bidirectional signal transmission, bidirectional control and remote control between the bidirectional wireless electrical energy monitoring apparatus and the bidirectional wireless electrical energy monitoring switchgear, the power consumption of multiple electrical equipments may be monitored by the bidirectional wireless electrical energy monitoring switchgear, and the users may operate the keys in the first key module, according to the power consumption sent by the bidirectional wireless electrical energy monitoring switchgear, to control the switch control circuit of the bidirectional wireless electrical energy monitoring switchgear, thereby powering on/off the electrical equipment, which has the effects of prompting power saving and reasonable power consumption. 
     
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
         [0016]      FIG. 1  is a schematic diagram of connection between the bidirectional wireless electrical energy monitoring apparatus, the bidirectional wireless electrical energy monitoring switchgear and the electrical equipment according to the present invention; 
           [0017]      FIG. 2  is a block diagram showing the principle of the bidirectional wireless electrical energy monitoring apparatus according to the present invention; 
           [0018]      FIG. 3  is a block diagram showing the principle of the bidirectional wireless electrical energy monitoring switchgear according to the present invention; 
           [0019]      FIG. 4  is a schematic diagram showing the circuit of the first wireless bidirectional module according to the present invention; 
           [0020]      FIG. 5  is a schematic diagram showing the circuits of the clock and calendar module and the first power source module according to the present invention; 
           [0021]      FIG. 6  is a schematic diagram showing the circuit of the first microprocessor according to the present invention; 
           [0022]      FIG. 7  is a schematic diagram showing the circuits of the display module and the first key module according to the present invention; 
           [0023]      FIG. 8  is a schematic diagram showing the circuit of the second wireless bidirectional module according to the present invention; 
           [0024]      FIG. 9  is a schematic diagram showing the circuits of the second microprocessor, the current induction module, the second key module and the indicator circuit according to the present invention; 
           [0025]      FIG. 10  is a schematic diagram showing the circuits of the second power source module and the switch control circuit according to the present invention. 
       
    
    
     DETAILED DESCRIPTION OF THE EMBODIMENTS 
       [0026]    The present invention will be further described with reference to the figures. Referring to  FIGS. 1 to 3 , the bidirectional wireless electrical energy monitoring system includes a bidirectional wireless electrical energy monitoring apparatus  1  and a bidirectional wireless electrical energy monitoring switchgear  2 . The bidirectional wireless electrical energy monitoring switchgear  2  is connected to a socket corresponding to the electrical equipment  3 ; the bidirectional wireless electrical energy monitoring apparatus  1  includes a first wireless bidirectional module  16  which may receive a current signal from the bidirectional wireless electrical energy monitoring switchgear  2  or transmit a control signal to the bidirectional wireless electrical energy monitoring switchgear  2 ; the bidirectional wireless electrical energy monitoring switchgear  2  includes a second wireless bidirectional module  24  which may receive the control signal from the bidirectional wireless electrical energy monitoring apparatus  1  or transmit the current signal of electrical equipment  3  to the bidirectional wireless electrical energy monitoring apparatus  1 ; the first wireless bidirectional module  16  matches the second wireless bidirectional module  24 , which may implement bidirectional signal transmission, therefore, the present invention may realize the bidirectional signal transmission, bidirectional control and remote control between the bidirectional wireless electrical energy monitoring apparatus  1  and the bidirectional wireless electrical energy monitoring switchgear  2 , the power consumption of the electrical equipment  3  may be monitored by the bidirectional wireless electrical energy monitoring switchgear  2 , and the bidirectional wireless electrical energy monitoring apparatus  1  may reversely control the bidirectional wireless electrical energy monitoring switchgear  2  according to the power consumption sent by the bidirectional wireless electrical energy monitoring switchgear  2 , thereby powering on/off the electrical equipment  3 , which has the effects of prompting power saving and reasonable power consumption. 
         [0027]    The bidirectional wireless electrical energy monitoring apparatus  1  according to the present invention includes a first microprocessor  11 , a display module  13  and a first key module  14 . An input of the display module  14  is connected to a display driving output of the first microprocessor  11  such that the first microprocessor  11  may drive an external display screen through the display module  13  for displaying the electrical energy parameters, such as the power, the power consumption and real time of electrical equipment  3 , etc. An output of the first key module  14  is connected to a key detection input of the first microprocessor  11  such that the user may input a control signal through the first key module  14  to control the bidirectional wireless electrical energy monitoring switchgear  2 . As shown in  FIG. 7 , when a key K of the first key module  14  is pressed, an instruction of the key K is transmitted to the execution end, and after reception of the instruction of the key K, the execution end feeds back the execution status of the instruction to the LED lamp. For example, if the execution end executes the instruction of the key K, the LED lamp is lightened after receiving the feedback instruction from the execution end; otherwise, if the execution end does not execute the instruction of the key K, the LED lamp is not lightened after receiving the feedback instruction from the execution end. Therefore, it can be determined whether the instruction has been executed according to whether the LED lamp is lightened after a key K is pressed, 
         [0028]    The bidirectional wireless electrical energy monitoring apparatus  1  according to the present invention further includes a clock and calendar module  15  and a first power source module  12 . The clock and calendar module  15  is connected to the first microprocessor  11  for setting the clock and calendar; the first power source module  12  is composed of a first power input circuit  121  and a first voltage regulator circuit  122 . The input of the first power input circuit  121  is connected to an external power source, the output of the first power input circuit  121  is connected to the input of the first voltage regulator circuit  122 , and the output of the first voltage regulator circuit  122  is connected to the power inputs of the first microprocessor  11 , the display module  13 , the first key module  14 , the first wireless bidirectional module  16  and the clock and calendar module  15 , respectively, for providing the first microprocessor  11 , the display module  13 , the first key module  14 , the first wireless bidirectional module  16  and the clock and calendar module  15  with working power. 
         [0029]    The bidirectional wireless electrical energy monitoring switchgear  2  according to the present invention includes a second microprocessor  21 , a current induction module  25  and a switch control circuit  23 . An output of the current induction module  25  is connected to a current detection input of the second microprocessor  21 , such that the second microprocessor  21  may measure the current used by the electrical equipment  3  through the current induction module  25 ; an input of the switch control circuit  23  is connected to a control output of the second microprocessor  21 , such that the second microprocessor  21  may control the power off/on of the electrical equipment  3  through the switch control circuit  23 . 
         [0030]    The bidirectional wireless electrical energy monitoring switchgear  2  according to the present invention further includes a second key module  26  and an indicator circuit  27 . The output of the second key module  26  is connected to the key detection input of the second microprocessor  21 , and the input of the indicator circuit  27  is connected to the status output of the second microprocessor  21 , such that the operator may input a control signal through the second key module  26  and the control signal is output from the second microprocessor  21  to the switch control circuit  23  and the indicator circuit  27 , thereby controlling the working status of the switch control circuit  23  and the indicating status of the indicator circuit  27 . 
         [0031]    The bidirectional wireless electrical energy monitoring switchgear  2  according to the present invention further includes a second power source module  22  which includes a second power input circuit  221 , a rectifying circuit  222  and a second voltage regulator circuit  223 . The input of the second power input circuit  221  is connected to an external power source, the output of the second power input circuit  221  is connected to the AC input of the switch control circuit  23  and the input of the rectifying circuit  222 , respectively, the output of the switch control circuit  23  is used to be connected to the power input of the electrical equipment  3 , the output of the rectifying circuit  222  is connected to the AC input of the switch control circuit  23  and the input of the second voltage regulator circuit  223 , respectively. When the switch control circuit  23  is switched on, the electrical equipment  3  is powered on, and when the switch control circuit  23  is switched off, the electrical equipment  3  is powered off. The output of the second voltage regulator circuit  223  is connected to the DC inputs of the second microprocessor  21 , the current induction module  25 , the second wireless bidirectional module  24 , the second key module  26  and the indicator circuit  27 , respectively, for providing the second microprocessor  21 , the current induction module  25 , the second wireless bidirectional module  24 , the second key module  26  and the indicator circuit  27  with working power. The second power source module  22  further includes a voltage detection circuit  224 . The input of the voltage detection circuit  224  is connected to the output of the second power input circuit, and the output of the voltage detection circuit  224  is connected to the voltage detection input of the second microprocessor  21  for detecting the input voltage of the power source, such that the second microprocessor  21  may detect whether the voltage of power source is normal through the voltage detection circuit  224 , therefore the functions of overvoltage protection, under-voltage protection and overload protection may be realized by the present invention. 
         [0032]    Referring to  FIGS. 4 to 10 , they show the particular circuit diagrams of the present invention. The first wireless bidirectional module  16  according to the present invention is composed of a radio frequency transceiver chip U 1 _ 1 , a crystal oscillator Y 1 _ 1 , an antenna J 1 _ 1 , capacitors C 1 _ 1 , C 1 _ 2 , C 1 _ 4 , C 1 _ 5  and inductances L 1 _ 1 , L 1 _ 2 , L 1 _ 3 . One end of the crystal oscillator Y 1 _ 1  is connected to the 9 pin of the radio frequency transceiver chip U 1 _ 1 , and the other end is grounded; one end of the capacitor C 1 _ 5  is connected to the 15 pin of the radio frequency transceiver chip U 1 _ 1 , and the other end is grounded; the inductance L 1 _ 1  is connected between the 12 pin and 13 pin of the radio frequency transceiver chip U 1 _ 1 , and the inductance L 1 _ 2  is connected between the 12 pin and 14 pin of the radio frequency transceiver chip U 1 _ 1 ; one end of the capacitor C 1 _ 1  is connected to the 13 pin of the radio frequency transceiver chip U 1 _ 1 , and the other end is grounded; one end of the capacitor C 1 _ 4  is connected to the  12  pin of the radio frequency transceiver chip U 1 _ 1 , the other end is connected to one end of the inductance L 1 _ 3 , and the other end of the inductance L 1 _ 3  is connected to the 13 pin of the radio frequency transceiver chip U 1 _ 1 ; one end of the capacitor C 1 _ 2  is connected to the intersection of the inductances L 1 _ 3  and C 1 _ 4 , and the other end is connected to the antenna J 1 _ 1 ; the 11 pin of the radio frequency transceiver chip U 1 _ 1  is a grounding pin which is grounded, the 14 pin of the radio frequency transceiver chip U 1 _ 1  is a power pin for providing power, and the 1-8 pins, 10 pin and 16 pin of the radio frequency transceiver chip U 1 _ 1  are connected to the first microprocessor  11 . The antenna J 1 _ 1  may receive the signal from the second wireless bidirectional module  24  and output to the radio frequency transceiver chip U 1 _ 1  which then outputs the signal to the first microprocessor  11 . When the first microprocessor  11  outputs the control signal to the radio frequency transceiver chip U 1 _ 1 , the radio frequency transceiver chip U 1 _ 1  performs coding processing on the control signal and then output it to the antenna J 1 _ 1  which may transmit the control signal to the second wireless bidirectional module  24 . 
         [0033]    The clock and calendar module  15  is composed of a clock chip U 1 _ 5 , a crystal oscillator Y 1 _ 2 , a backup battery BT 1 _ 1 , resistors R 1 _ 1 , R 1 _ 2 , R 1 _ 3 , capacitors C 1 _ 17 , C 1 _ 20  and diodes D 1 _ 1 , D 1 _ 21 . Y 1 _ 2  is connected between the 1 pin and 2 pin of the U 1 _ 5 , C 1 _ 17  is connected between the 1 pin and 4 pin of the U 1 _ 5 , and the 4 pin of the U 1 _ 5  is grounded; one end of R 1 _ 2  is connected to the 6 pin (SCL pin) of the U 1 _ 5 , and the other end is connected to the power source (VCC 1 ), one end of R 1 _ 3  is connected to the 5 pin (SDA pin) of the U 1 _ 5 , and the other end is connected to the power source; one end of C 1 _ 20  is connected to the 8 pin of the U 1 _ 5 , and the other end is grounded, the cathode of the C 1 _ 21  is connected to the 8 pin of the U 1 _ 5 , and the anode is connected to the power source; the cathode of the D 1 _ 21  is connected to the 8 pin of the U 1 _ 5 , and the anode is connected to the anode of the BT 1 _ 1 ; one end of the R 1 _ 1  is connected to the 8 pin of the U 1 _ 5 , the other end is connected to the anode of the BT 1 _ 1 , and the cathode of the BT 1 _ 1  is grounded; the 3 pin (INT) of the U 1 _ 5  is connected to the first microprocessor  11 . Since the backup battery BT 1 _ 1  is provided, when the power input of the clock and calendar module  15  has no input power, the backup battery BTU may keep the clock and calendar module  15  working normally. 
         [0034]    The first power source module  12  is composed of a first power input circuit  121  and a first voltage regulator circuit  122 . The first power input circuit  121  is composed of a power socket J 1 _ 3  and capacitors C 1 _ 13 , C 1 _ 18 . The capacitors C 1 _ 13 , C 1 _ 18  are both connected between the 1 pin and 2 pin of the power socket J 1 _ 3  in parallel, and the 2 pin of J 1 _ 3  is grounded; the first voltage regulator circuit  122  is composed of a power voltage regulator chip U 1 _ 2  and capacitors C 1 _ 14 , C 1 _ 19 . The  1  pin of U 1 _ 2  is connected to the  1  pin of the power socket J 1 _ 3 , and the 2 pin of U 1 _ 2  is grounded. The capacitors C 1 _ 14 , C 1 _ 19  are both connected between the 2 pin and 3 pin of the U 1 _ 2  in parallel, and the 3 pin of the U 1 _ 2  is an output of the first power source module  12 , for providing the first microprocessor  11 , the display module  13 , the first key module  14 , the first wireless bidirectional module  16  and the clock and calendar module  15  with working power. 
         [0035]    The second wireless bidirectional module  24  according to the present invention is composed of a radio frequency transceiver chip U 2 _ 1 , a crystal oscillator Y 2 _ 1 , an antenna J 2 _ 1 , capacitors C 2 _ 1 , C 2 _ 2 , C 2 _ 4 , C 2 _ 5  and inductances L 2 _ 1 , L 2 _ 2 , L 2 _ 3 . One end of the crystal oscillator Y 2 _ 1  is connected to the 9 pin of the radio frequency transceiver chip U 2 _ 1 , and the other end is grounded; one end of the capacitor C 2 _ 5  is connected to the 15 pin of the radio frequency transceiver chip U 2 _ 1 , and the other end is grounded; the inductance L 2 _ 1  is connected between the 12 pin and 13 pin of the radio frequency transceiver chip U 2 _ 1 , and the inductance L 2 _ 2  is connected between the 12 pin and 14 pin of the radio frequency transceiver chip U 2 _ 1 ; one end of the capacitor C 2 _ 1  is connected to the  13  pin of the radio frequency transceiver chip U 2 _ 1 , and the other end is grounded; one end of the capacitor C 2 _ 4  is connected to the 12 pin of the radio frequency transceiver chip U 2 _ 1 , the other end is connected to one end of the inductance L 2 _ 3 , and the other end of the inductance L 2 _ 3  is connected to the 13 pin of the radio frequency transceiver chip U 2 _ 1 ; one end of the capacitor C 2 _ 2  is connected to the intersection of the inductances L 2 _ 3  and C 2 _ 4 , and the other end is connected to the antenna J 2 _ 1 ; the 11 pin of the radio frequency transceiver chip U 2 _ 1  is a grounding pin which is grounded, the 14 pin of the radio frequency transceiver chip U 2 _ 1  is a power pin for providing power, and the 1-8 pins, 10 pin and 16 pin of the radio frequency transceiver chip U 2 _ 1  are connected to the second microprocessor. When the second microprocessor  21  output the current signal of the electrical equipment  3  to the radio frequency transceiver chip U 2 _ 1 , the radio frequency transceiver chip U 2 _ 1  performs coding processing on this signal and then output to the antenna J 2 _ 1 , the J 2 _ 1  may transmit the current signal of the electrical equipment  3  to the first wireless bidirectional module  16 ; the J 2 _ 1  may also receive the control signal from the first wireless bidirectional module  16  and input it to the radio frequency transceiver chip U 2 _ 1  which then output the control signal to the second microprocessor  21 , the second microprocessor  21  controls the switch control circuit  23  according to this control signal, thereby powering off/on the electrical equipment  3 . 
         [0036]    The types of the radio frequency transceiver chip U 1 _ 1  used by the first wireless bidirectional module  16  and the radio frequency transceiver chip U 2 _ 1  used by the second wireless bidirectional module  24  according to the present invention are both IA4421. Such chip has the features including less peripheral devices, automatic frequency control, assurance for the transceiver to be automatically adjusted to the frequency of the input signal, and the chip works in the frequency band 433/868/915 MHz which needs no registration. 
         [0037]    The second microprocessor  21  according to the present invention is a singlechip, the type of witch is PIC16F687. The indicator circuit  27  is composed of a light-emitting diode (LED) D 2 _ 9  and a resistor R 2 _ 10 . One end of the R 2 _ 10  is connected to the output of the second voltage regulator circuit  223 , and the other end is connected to the anode of the D 2 _ 9 , the cathode of the D 2 _ 9  is connected to the second microprocessor  21 , and the second microprocessor  21  may control the working status of the LED D 2 _ 9  display circuit by outputting the control signal to the indicator  27 . Of course, the indicator circuit  27  may also use the display apparatus such as the LCD display screen, not limiting to the LED. 
         [0038]    The switch control circuit  23  according to the present invention is composed of a relay J 2 _ 2 , a transistor Q 2 _ 1 , a diode D 2 _ 1  and resistors R 2 _ 1 , R 2 _ 13 . The 1 pin of J 2 _ 2  is connected to the output of the second power input circuit  221 , the 2 pin of J 2 _ 2  is a common pin, the 3 pin of J 2 _ 2  is an output of the switch control circuit  23  for connecting with the power input of the electrical equipment  3 . The 4 pin of J 2 _ 2  is connected to the output of the rectifying circuit  222 , the 5 pin of J 2 _ 2  is connected to the collector of the Q 2 _ 1 , and the emitter of the Q 2 _ 1  is grounded. The R 2 _ 13  is connected between the emitter and base of the Q 2 _ 1 . The cathode of the D 2 _ 1  is connected to the 4 pin of J 2 _ 2 , and the anode of the D 2 _ 1  is connected to the 5 pin of J 2 _ 2 . The base of the Q 2 _ 1  is connected to one end of the R 2 _ 1 , and the other end of the R 2 _ 1  is connected to the second microprocessor  21 , such that the second microprocessor  21  may output the control signal for controlling the relay J 2 _ 2  to be closed or opened, thereby powering off/on the electrical equipment  3 . 
         [0039]    The embodiments described above are only the preferred embodiment of the present invention, therefore the equivalent changing or modification according to the constructions, features and principles within the scope of the present invention paten application will be included in the scope of the present invention paten application. 
       INDUSTRIAL APPLICABILITY 
       [0040]    The present invention may realize the bidirectional signal transmission, bidirectional control and remote control between the bidirectional wireless electrical energy monitoring apparatus and the bidirectional wireless electrical energy monitoring switchgear, the power consumption of multiple electrical equipments may be monitored by the bidirectional wireless electrical energy monitoring switchgear, and the users may operate the keys in the first key module, according to the power consumption sent by the bidirectional wireless electrical energy monitoring switchgear, to control the switch control circuit of the bidirectional wireless electrical energy monitoring switchgear, thereby powering on/off the electrical equipment, which has the effects of prompting power saving and reasonable power consumption.