The electronic truck scale is mainly composed of scale body, load cell and data
Wire, junction box, weighing instrument and other parts, in order to better apply
Electronic truck scales perform measurement operations and recognize different types of weighing sensors
Research on the impact of device performance differences is very necessary.
1 Working principle of electronic truck scale
According to different types of sensors, electronic truck scales are divided into digital
Electronic truck scale and analog electronic truck scale.
The working principle of the analog electronic truck scale is: it is measured and tested
The mass of the object acts vertically on the weighing platform of the electronic truck scale, and the electronic truck scale
The weighing platform of the truck scale transmits the mass of the measured object to the sensor, so that the sensor
The elastic body deforms, and then the sensor is attached to the elastic body and
The resistance value of the strain gauges that make up the Whistler bridge changes, and the bridge balances
is broken, and outputs a voltage that is linear with the measured size
Signal. Because the sensitivity of the analog load cell is slightly different, so
The voltage output of each sensor under the action of the same measured object
Slightly different, affect the consistency of weighing, so need to be in the system
Connect to a junction box and adjust the output signal of each sensor to a
As a result, the voltage signal output from the junction box is connected to the weighing instrument.
After the meter is processed, the measurement result is displayed in digital form.
Working principle of digital electronic truck scale: in analog electronic vehicle
The balance sensor is equipped with amplification filter, A/D conversion, and microprocessor core.
A digital processing circuit composed of chips and temperature sensitive components, etc., using electric
Sub-beam welding and laser welding for sealing. Using digital transmission, overcome the
The signal of the analog load cell is small, the transmission distance is short, and the anti-interference ability
Poor strength, poor anti-cheating ability and other shortcomings. Utilize microprocessor chip to store
The imported program software implements various digital electronic truck scale sensors based on
Word compensation technology, comprehensive performance test and verification, so that the output
The digital signal meets the technical requirements.
2 Different types of load cell performance differences
The digital electronic truck scale weighing sensor system is based on the traditional analog sensor, integrating modern microelectronic technology, micrometer
An electronic weighing technology developed by computer technology.