Combustible gas detector and calibration method thereof

Abstract

The invention discloses a combustible gas detector. The combustible gas detector is composed of a power management unit, a main control chip unit, a sensor and an interface circuit unit, an output alarm unit, a V / I conversion circuit unit and a communication circuit unit, wherein the power management unit is connected with the other units and can provide power for the other units; the main control chip unit is connected with the sensor and the interface circuit unit, the communication circuit unit, the output alarm unit and the V / I conversion circuit unit, controls the communication circuit unit to be communicated with an upper computer, carries out digitization on data processed through the sensor and the interface circuit unit, and configures an interface circuit connected with the sensor and the interface circuit unit; and the communication circuit unit, the output alarm unit and the V / I conversion circuit unit are enabled or prohibited through the main control chip unit. The combustible gas detector provided by the invention is connected with an upper computer PC with display and interface operational software through a communication module, the parameter calibration such as internal compensation and gain of the combustible gas detector is realized in an on-line manner through the operation on the software, the detecting precision is less influenced by temperature, and large-scale manufacturing and calibration are conveniently realized.

Description

technical field [0001] The invention relates to the field of gas detectors, in particular to a combustible gas detector and a calibration method thereof. Background technique [0002] From the perspective of domestic and foreign development, combustible gas detector products are developing in the direction of low power consumption, long life, good stability, advanced technology, digital bus system, multi-function, integration, and high degree of intelligence. The rapid development of gas detectors has made gas detection products coexist with new and old: multi-wire combustible gas detectors composed of sensing elements, amplifier circuits, and detector housings; output 4~20mA standard signals, with (or without) on-site Multi-wire combustible gas transmitter with concentration display; bus-type switch detector and analog detector; signal acquisition, data processing, fault judgment function completed on site, and then digital transmission and communication with the controller...

AI Technical Summary

Problems solved by technology

[0004] In order to overcome the disadvantages that the existing combustible gas detector (203) is not suitable for various use requirements and inconvenient to calibrate and adjust, so that the combustible gas detector (203) can be applied to various application environments and can be calibrated and debugged conveniently, The present invention designs a combustible gas detector (203) and its calibration method

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