Remote-control digital weighing machine with temperature compensation function and temperature compensation method for remote-control digital weighing machine

Abstract

The invention relates to a remote-control digital weighing machine with a temperature compensation function and a temperature compensation method for the remote-control digital weighing machine. The remote-control digital weighing machine comprises a weighing sensor, an AD (analog and digital) conversion module, a CPU (central processing unit), an external DSP (digital signal processing) display, an interface circuit, a temperature compensation circuit, an external voltage testing circuit, a keyboard circuit, a wireless communication module, a power supply and a DC-DC charge pump of a stabilized voltage supply; an equal-arm bridge of the weighing sensor comprises four resistance strain gauges, and various components are powered by the power supply and the DC-DC charge pump of the stabilized voltage supply; after force signals detected by the weighing sensor are converted into analog electric signals, the analog electric signals are inputted into the AD conversion module and are converted into digital signals, and the digital signals are inputted into the CPU to be processed, so that a weight value of a measured object is obtained; output ends of the CPU are respectively connected with the external DSP display and the interface circuit, an input end of the CPU is connected with the temperature compensation circuit, and another output end of the CPU is connected with the wireless communication module; the power supply outputs two power supply channels via the DC-DC charge pump of the stabilized voltage supply, and the AD conversion module and the CPU are respectively powered by the two power supply channels. The remote-control digital weighing machine and the temperature compensation method can be applied to different service places.

Description

technical field [0001] The invention relates to a weighing device and a temperature compensation method thereof, in particular to a remote-controlled temperature compensation digital weighing device and a temperature compensation method thereof. Background technique [0002] At present, an electronic scale is generally composed of a load cell (including an analog load cell or a digital load cell) and a weighing instrument. The load cell and the weighing instrument are separated from each other. supply. When the load cell is stressed, the weak signal is transmitted to the secondary instrument through the line for processing. The weak signal output by the load cell will be attenuated during the line transmission, and it is easily affected by electromagnetic interference. Similarly, the secondary instrument is also easily affected by moisture outside and interfered by the electromagnetic field. The anti-interference ability of the digital load cell has been improved, but the ...

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Problems solved by technology

[0004] In addition, the signal output of the load cell will be affected by the temperature, so each load cell must go through a complex process for hardware temperature compensation, so that it is possible to meet the requirements of the national standard

When some industrial electronic scales are used in the field, they need to be pulled to the control room, and there are defects such as not being able to directly see the readings on the spot, not being able to operate and calibrate on the spot

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