一、 Working principle of electronic truck scale

    Quality of the object being measured vertically on the electronic truck scale according to the stage, the quality of the analyte sensor perceived elastomer after deformation, thus make the sensor of stick on the elastomer and whistler bridge change the resistance strain gauge, bridge balance is broken, output is measured with a linear relationship with the size of a voltage signal,  , because of the sensitivity is not the same in each sensor is measured in the same material under the action of the output voltage of the each sensor is slightly different, affect the weighing consistency, so need to access a terminal block in the system, the output of each sensor signal into a consistent, from the junction box of the output voltage signal into weighing display, after weighing display treatment,  Display measurement results in numerical form.  

二、Advantages of electronic weighing sensors

First, continuity is good

   It can ensure the continuity of production and monitor the working condition of each sensor in real time. Even if a sensor is found to be faulty, it can automatically start the uninterrupted working mode and still guarantee the weighing under a certain time and precision, so as not to cause production shutdown.  At the same time, the instrument will send a signal to the user to locate the fault sensor for replacement.  

Secondly, good confidentiality  

   With anti-cheating function, its anti-cheating function can effectively prevent remote control cheating, once found will take the error alarm, effectively ensure the safety and accuracy of data, can effectively place cheating device cheating.  

Thirdly, the intelligent compensation of sensor software is added  

   Through the digital compensation circuit and process, can be linear, hysteresis, creep compensation, built-in temperature sensor, through the compensation software can be real-time temperature compensation, address adjustable, easy to use and exchange, diagnosis and correction.  

Finally, the aviation plug protection grade is high, the plug convenient cable length can be changed according to the need, because the transmission is a digital signal, will not affect the measurement accuracy.  

三、Application of electronic truck scale sensor

◆  Application in weighing system  

    At present, a system that enterprises use more is the weighing system.  Implementation of weighing such as cars, truck scale sensor installation guide slope perception would signal a rod instructions about computers, start, the infrared camera, through the infrared camera to automatically capture operation of the whole process of automobile weighing, automatic identification weighing the car license plate number information at the same time, automatically record the relevant data such as weight value, and stored on the Internet of the instrument,  Then through the mobile communication module in the Internet of Things instrument, the stored data will be sent to the server and stored in the database. After completing these operations, the railings at the other end will be opened to release the weighing vehicle. Generally, it takes two steps above to complete the whole weighing process of the vehicle.  

◆  Application of anti-cheating technology in weighing  

    First, infrared anti-cheating technology.  More common is the use of parking position to implement cheating, in the weight of the link, in the car weighing, part of the car pressure at both ends or both sides of the electronic truck scale sensor, in order to reduce the weight of the car, to achieve the purpose of cheating.  In general, due to the Angle of view error, it is difficult for inspectors to completely see the specific parking position of vehicles in the electronic truck scale.  In the face of this common cheating situation, infrared detection technology can be used to monitor the position of the car, through the use of two groups of switches placed inside the column, and longitudinal arrangement, so as to constantly improve the detection of the range and density. If there is illegal parking of vehicles in the process of weighing, the infrared anti-cheating technology can be used to send an alarm, prompting the driver of the weighing vehicle to adjust the position of the vehicle, so as to effectively prevent the occurrence of cheating.  

    The second is video surveillance technology.  Check the weight of the vehicle for more people or carrying items to lift the vehicle weighing, after the completion of the detection, timely unloading items or transfer people, in order to achieve the purpose of cheating.  At this time, through the application of video monitoring technology, the whole process of the weighing vehicle scene can be omni-directional camera, avoid improper behavior in the process of weight inspection, reduce the possibility of cheating.  At the same time, the detection personnel can also store the recorded image information in time, check and read at any time, to achieve the real-time supervision and management of the detection process, when necessary, can also be used as evidence, and then play an all-round end to the purpose of cheating.  

    Then there is digital technology.  By installing an electronic remote control device to cheat, it is mainly by installing a pulse generator device in the middle of the connecting line of the electronic truck scale sensor, the application of remote control device to change the pulse signal, change the value of the instrument display, and then achieve the purpose of increasing or reducing the scale.