Cheating prevention electronic weighing apparatus calibrating system and method

Abstract

The invention relates to cheating prevention electronic weighing apparatus calibrating system and method. The calibrating system comprises an electronic weighing apparatus, an electronic weighing apparatus calibrating device and a metering supervisory management platform, wherein the metering supervisory management platform comprises an electronic weighing apparatus, a calibrating device, databases comprising various identity information and operating information of a calibrating staff and a computer or a server for carrying the databases, and establishes direct or indirect data communication link by a network and the calibrating device. The system is provided with a card swiping unit and an authenticating unit, a calibrating mode of the traditional electronic weighing apparatus can be changed, the calibrating operation is transmitted to the calibrating device to be carried out so as to ensure the electronic weighing apparatus can not independently finish the calibrating program, which enhances the safety and reliability of calibration and effectively prevents illegal calibration, thereby effectively preventing a behavior for cheating on the electronic weighing apparatus by the illegal calibration on the electronic weighing apparatus.

Description

technical field [0001] The invention relates to the technical field of scale calibration, in particular to a calibration system for electronic scales. Background technique [0002] Analog scales, such as mechanical scales, use the principle of lever displacement to measure the mass of the object to be measured. It is an analog measurement, so the displayed value has a large error. Electronic scales, such as electronic scales, use the principle of sensor measurement. It deforms the external pressure through the elastic beam of the sensor to make the resistance of the strain gauge attached to it change. Under the action of the excitation voltage, the output is proportional to the measured object. The analog electrical signal is sent to the analog-to-digital conversion circuit (AD circuit). The AD circuit of the electronic weighing instrument, it modulates, amplifies, filters, samples, and integrates the analog signal sent by the sensor, outputs a stable and efficient digital ...

AI Technical Summary

Problems solved by technology

The disadvantage of this calibration method is that scale dealers and ordinary maintenance outlets can easily obtain calibration passwords and calibration methods, and even ordinary people can obtain complete calibration methods on the Internet, resulting in the widespread existence of illegal calibration. A large number of cheating on electronic weighing instruments through illegal calibration has caused a large number of electronic we

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