Long-distance automatic verification system of digital display type temperature indicating instrument

Abstract

The invention discloses a long-distance automatic verification system of a digital display type temperature indicating instrument. According to the invention, a communication module at a field end is communicated with an upper computer at a long-distance end, wherein one path of a standard source at the field end is connected with the communication module through an RS232 (Recommend Standard 232) and a GPIB (General Purpose Interface Bus) and the other part of the standard path is connected with a multi-way switch; a stepping motor is connected with an image collection module and the stepping motor is connected with the communication module through a PLC (Programmable Logic Controller); one way of the multi-way switch is connected with the PLC and the other way of the multi-way switch is connected with an instrument to be verified; and the image collection module is connected with the communication module and the image collection module is used for collecting readings of the instrument to be verified. According to the invention, by utilizing a network technology, the separation of data collection and data treatment of the verification of the digital display type temperature indicating instrument is realized, and the instrument to be verified can be verified by a verification mechanism without being transported, thereby providing a solution for tracing to the verification mechanism with a higher grade; and meanwhile, the automatic verification of a plurality of the digital display type temperature indicating instruments can be finished at the same time, so that the verification cost is reduced and the verification efficiency is improved.

Description

technical field [0001] The invention relates to a remote automatic verification system for a temperature indicating instrument, in particular to a remote automatic verification system for a digital display temperature indicating instrument. Background technique [0002] Digital display temperature indicating instruments can be seen everywhere in industrial production, indicating the temperature parameters in the industrial production process to ensure the safe and stable operation of production. In order to ensure the correctness of the temperature data indicated by the digital display temperature indicating instrument. The traditional verification method is to send the inspected instrument to a qualified institution for verification. The general steps are as follows: the standard signal output by the standard source is sent to the inspected instrument. After the reading of the inspected instrument is stable, the manually recorded The output of the instrument, and then use ...

AI Technical Summary

Problems solved by technology

The problems with the above verification methods are: first, the instruments to be inspected need to be sent to institutions with verification qualifications. If there are many instruments to be inspected, it will take time and effort.

The second is that it is easy to introduce human error into the verification process of the digital display temperature indicating instrument, which directly affects the objectivity of the verification process

The disadvantage of this device is that only one instrument under test can be verified at a time. For the occasions where multiple instruments under test of the same type need to be verified, special personnel are required to frequently replace the instruments under test, which will seriously restrict the efficiency of automatic verification.

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