Digital Load Cell Weighing Technology
Digital truck scale because of the use of digital weighing technology,constitute the way with the traditional simulation truck scale there is a big difference.
First of all, digital truck scale instrument (or computer) and the interface between the sensor is a digital communication interface (usually RS485 communication), the instrument directly receives the sensor sent the digital signal, the transmission line length up to 1200m. While the interface between ordinary analog car scale meters and sensors is an analog interface. The instrument first receives the sensor's analog signal, and then its A / D conversion before further processing, transmission distance is generally (20 ~ 30) m.
Second, because the digital truck scale is received by the digital signal,adjust the angle difference directly in the instrument through the software to deal with, rather than analog car scale, the need to adjust the junction box potentiometer to achieve the purpose of adjusting the angle difference. These obvious differences determine the number of digital truck scales in the installation and commissioning there are many superior to the analog car scale place,in the installation and use of more convenient.
Digital sensor system is based on the traditional resistance strain sensor,combined with modern microelectronics technology, microcomputer technology integration and developed a new type of electronic weighing technology. It consists of analog sensors (resistance strain type) and digital conversion module composed of two parts. The digital module is made of highly integrated electronic circuit and is made of SMT surface mount technology, including amplifiers, A / D converters, microprocessors (CPUs), memory,interface circuits (RS485) and digital temperature sensors. It has the following characteristics:
First of all, digital sensors using integrated A / D conversion circuit, digital signal transmission and digital filtering technology, the sensor signal transmission distance, up to 1200m,anti-interference ability, digital sensor analog signal transmission distance is very short , While the sensor shell (elastomer) itself is a good shield, only these two characteristics to determine the advantages of its anti-jamming capability,to a large extent improve the stability of the sensor.
Second, the security is good, with anti-cheating function, can effectively prevent the remote control cheat, once found will automatically take the error alarm, effectively protect the data security and accuracy.The use of analog sensor truck scale is the case of the installation of cheating device is more common, Shouqin company around a few companies have simulated truck scale almost all installed cheating, resulting in a lot of economic losses.
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