Abstract:
A voice warning system for automobiles includes a microprocessor connected with the battery of an automobile, a plurality of sensors arranged on different parts of the engine and connected with the microprocessor, and two voice integrated circuits for storing voice messages, whereby the microprocessor will give voice messages to notify the driver of the conditions of the car thereby ensuring the safety of the driver.

Description:
BACKGROUND OF THE INVENTION 
     1. Field of the Invention 
     This invention is related to a voice warning system for automobiles which can ensure the safety of a driver. 
     2. Description of the Prior Art 
     The modem automobile is usualy driven by the water cooled, piston-type international combustion engine, mounted in the front of the vehicle. Its power is transmitted to the rear wheels by means of a drive shaft. 
     However, most drivers cannot know whether the automobile works properly or not and so many accidents happen due to the lack of perceiving the problem of the car. 
     Therefore, it is an object of the present invention to provide a device which can ensure the safety of a driver. 
     SUMMARY OF THE INVENTION 
     This invention is related to a voice warning system for automobiles. 
     It is the primary object of the present invention to provide a voice warning system which can send out a voice message to notify the driver of the conditions of the car. 
     It is another object of the present invention to provide a voice warning system which can ensure the safety of the driver. 
     It is still another object of the present invention to provide a voice warning system which is fit for practical use. 
     It is still another object of the present invention to provide a voice warning system which is simple in construction. 
     It is a further object of the present invention to provide a voice warning system which is low in cost. 
     The foregoing objects and summary provide only a brief introduction to the present invention. To fully appreciate these and other objects of the present invention as well as the invention itself, all of which will become apparent to those skilled in the art, the following detailed description of the invention and the claims should be read in conjunction with the accompanying drawings. Throughout the specification and drawings identical reference numerals refer to identical or similar parts. Many other advantages and features of the present invention will become manifest to those versed in the art upon making reference to the detailed description and the accompanying sheets of drawings in which a preferred structural embodiment incorporating the principles of the present invention is shown by way of illustrative example. 
    
    
     BRIEF DESCRIPTION OF THE DRAWINGS 
     FIG. 1 is a block diagram of a voice warning system for automobiles according to the present invention; and 
     FIG. 2 is a block diagram of the voice integrated circuit. 
    
    
     DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT 
     For the purpose of promoting an understanding of the principles of the invention, reference will now be made to the embodiment illustrated in the drawings. Specific language will be used to describe same. It will, nevertheless, be understood that no limitation of the scope of the invention is thereby intended, such alternations and further modifications in the illustrated device, and such further applications of the principles of the invention as illustrated herein being contemplated as would normally occur to one skilled in the art to which the invention relates. 
     With reference to the drawings and in particular to FIG. 1 thereof, the voice warning system for automobiles according to the present invention comprises a microprocessor  1 , a first integrated circuit IC-A  17 , and a second integrated circuit an IC-B  18 . The microprocessor  1  includes CPU, RAM, ROM, temporary memory and operational unit. Each of the integrated circuits IC-A  17  and IC-B  18  stores nine warning messages. A LCD module  27  is used for displaying data or images generated by the microprocessor  1 . As a voltage of 12V is applied to the power input  24 , the voltage will be regulated by a voltage regulator  25  to a voltage of 5V for supplying power to all block circuits. When an automobile is not started, the engine oil indicator lamp sensing interface  2  is at LOW condition and the third stage lock sensing interface  7  is also at LOW condition. When the automobile is started, these two blocks will be at HI condition which means that the automobile is successfully started. Meanwhile, the power input  24  is alreadly supplied with a voltage which is regulated by the voltage regulator  25  to a voltage of 5V for supplying voltage to all block circuits. As the voltage rises from 0 to 5V, a reset circuit  15  will send out a reset pulse signal to the microprocessor  1  for resetting its condition. In addition, a time base oscillator  14  begins to generate a time base of 3.58 MHZ and provide it to the microprocessor  1 . After a time delay of 3 seconds, the microprocessor  1  will trigger the first address voice of the IC-A  17  which will be converted into voice via PCM (pulse code modulation). Then, the voice will be mixed by a mixer  19  which is further adjusted to the desired magnitude by a volume control  20 . 
     Thereafter, the voice is enlarged by 40 dB by an amplifier  21  which is then output to a loudspeaker  23  via a mute circuit  22  to give a voice message “Condition voice computer is beginning to inspect the car”, which means that the system is at present subject to the protecting inspection mode. As the automobile is started, the present invention will begin to inspect the safety and protection action of the automobile. 
     The speed of the engine of an automobile is directly proportional to the frequency of the igniting waves. The higher the speed of the engine is, the higher the frequency of the igniting ripple will be. In installation, the engine speed sensor is adjusted at 2000 revolutions so that the engine speed will be higher than this value when the automobile travels normally thereby making it possible to discriminate whether the automobile is stopped (engine speed below 1500 revolutions) or moving (engine speed above 2000 revolutions). An engine speed sensing interface  11  picks up ripples from the power which will be enlarged 1000 times by a ripple differential amplifier  12  and then modified by a window comparator  13  to high pulse signal which is then transmitted to the microprocessor  1 . The correct engine speed is obtained (since automobiles are of different numbers of cylinders, it is necessary to perform this adjustment) by proportionally subtracting the value of the engine speed sensing adjustment  16  from the signal. 
     When the microprocessor  1  finds the engine speed over 2000 revolutions, the automobile must travel normally. In the meantime, if the door positive sensing interface  5  is negative or the door negative sensing interface  6  is positive, this means that the door(s) are not closed and the microprocessor  1  will immediately trigger the IC-A  17  to send out another warning message “Please close the door.”, thereby ensuring the safety in driving. When the automobile begins to travel, the microprocessor  1  will first discriminate whether the hand brake sensing interface  3  is at the Hi condition (Hi and Low refer to the conditions that the hand brake is released or pulled respectively.). 
     If the hand brake sensing interface  3  is at the Low condition, the microprocessor  1  will immediately trigger the IC-A  17  to send out the third warning message “Please release the hand brake” through the loudspeaker  23 . 
     If the engine oil is insufficient, the engine oil sensing interface  2  will be at Low condition and when the engine speed is higher than O revolution, the microprocessor will immediately send out the fourth warning message “Insufficient engine oil” through the loudspeaker  23 . 
     When the engine is overheated due to excessive running of the the engine or insufficient cooling water, the engine temperature sensor will pick up the overheat condition of the engine which will be transmitted to a high-low temperature selection  9  through an engine temperature sensing interface  8 . High or low temperature sensor is chosen depending on the category of the automobiles. After the high-low temperature comparation  10 , if the temperature of the engine exceeds the normal value, a signal will be sent to the microprocessor  1  which will trigger the IC-B  18  to send out the fifth warning message “engine overheated”. 
     If the gasoline sensing interface  4  is at Low condition, this means that the gasoline is insufficient and a signal will be sent to the microprocessor  1  which will then trigger the IC-B  18  to send out the sixth warning message “insufficient gasoline” every five minutes through the loudspeaker  23 . 
     When the voltage of the battery is found lower than 11.4V by the power detector  26 , this means that there is something wrong with the power generating system of the automobile or the battery is not working properly. Then, a signal will be sent to the microprocessor  1  which will trigger the IC-B  18  to send out the seventh warning message “Please check power generating system and belts” through the loudspeaker  23 . 
     The microprocessor  1  can be set as required so that the eighth warning message “Insufficient brake oil” will be sent out to remind the driver of filling brake oil through the brake oil level detector  28 . 
     Further, the microprocessor  1  can be set as required so that the ninth warning message “Please change engine oil” will be sent out to notify the driver of changing engine oil through the engine oil mileage interface  29  after the automobile has traveled a certain distance such as 5000 Km (about 3000 miles). 
     Likewise, the microprocessor  1  can be set as required so that the ninth warning message “Please change automatic transmission fluid” will be sent out to inform the driver of changing automatic transmission fluid through the automatic transmission fluid mileage interface  30  after the automobile has traveled a certain distance such as 30,000 Km (about 18,500 miles). 
     When the present invention does not send out any warning, the mute circuit  22  will keep on working and the loudspeaker  23  is cut off to prevent igniting noise produced from entering thereby preventing the production of noise. Further, the microprocessor  1  will output indicating sound to the mining circuit before the IC is triggered to send out warning messages thereby preventing the driver from being scarced. 
     Referring to FIG. 2, the voice integrated circuits IC-A  17  and IC-B  18  are made from APLUS INTEGRATED CIRCUITS INC. and includes an oscillator  30 , a clock generator  31 , a control logic  32 , an address sequencer  33 , a pop noise reduction and silence expansion  34 , a voice EPROM  35 , a DSCPCM decoder  36  and a D/A converter  37 . The working principle of the voice integrated circuits are well known in the art and not considered a part of the invention and need not be described here in detail. 
     It will be understood that each of the elements described above, or two or more together may also find a useful application in other types of methods differing from the type described above. 
     While certain novel features of this invention have been shown and described and are pointed out in the annexed claim, it is not intended to be limited to the details above, since it will be understood that various omissions, modifications, substitutions and changes in the forms and details of the device illustrated and in its operation can be made by those skilled in the art without departing in any way from the spirit of the present invention.