Electronic scale is a common measurement tool in daily life. It is convenient and accurate to use electronic scales. The digital display is also very intuitive and has strong readability. In addition, because of its small size, it is easy to carry and easy to maintain. Compared with man-made readings, electronic scales have higher reliability and are more in line with the requirements of legal measurement. This article focuses on analyzing the structural principles of the electronic scale and the verification method of the electronic scale, and further standardize the use of the electronic scale.
The structure principle of the electronic scale:
Electronic scales generally use resistance strain-type load-bearing sensors, which are relatively simple in structure, have high accuracy, and have the advantages of stability and reliability, and are inexpensive. Electronic scale sensors are connected in parallel. Due to the large number of sensors connected in parallel, the output reactance group and output of the sensor are inconsistent, and the sensitivity of the sensor is also different. Therefore, a junction box device can be used to connect the output terminal of the sensor. be consistent.
The junction box is to gather all the wiring heads of the sensor into one. The whole structure is equivalent to a resistor network. Each sensor is equipped with a resistor. If you want to change the output impedance of the sensor, you can adjust the resistance in the junction box. To complete, so that the output impedance of the sensor in the electronic scale can be kept consistent, which meets the principle and use requirements of the electronic scale.
The meter head on the electronic scale displays weighing information for users to read. It is also an intuitive embodiment of the entire electronic scale function. The bridge power supply inside provides the required power for the sensor. When a certain quality is placed on the electronic scale When an object, the sensor will undergo elastic deformation, and the resistance of the resistance strain gauge next to it will change accordingly. Then, the sensor will transmit an electrical signal through the signal line, which is related to the quantity of the object being weighed. proportion. Through the junction box, this signal will be sent to the preamplifier, at this time, the voltage will be amplified to reach the required voltage value. During the entire transmission process, there will be interference to the signal, and the filter is used to remove the interference. The electrical signal will become a digital signal on the converter, and the user can get the quality of the object.
In addition, there are function keys on the electronic scale. The user can input relevant information on the keys to allow the electronic scale to measure the quality and calculate the price. The digital display of the weighing result is more accurate and reliable than the human reading Higher, it will reduce calculation errors, which not only reflects the principle of fair trade, but also realizes the information exchange between the user and the electronic scale, and the value of the electronic scale is also effectively reflected.
Xiangshan Zhengtai Electrical Appliance Co., Ltd. is a professional electronic scale factory, please feel free to contact us if you need it.