Constant-temperature probe

Abstract

The invention relates to a constant-temperature probe which comprises a gas detection module, a microcomputer processing module, a temperature detection module and a heating voltage control module, wherein the temperature detection module is connected with the gas detection module and the microcomputer processing module. According to the constant-temperature probe, the temperature detection module detects the temperature inside the probe and then transmits temperature information of the probe to the microcomputer processing module, the microcomputer processing module processes the temperature information of the probe and transmits a comparison result to the heating voltage control module, the heating voltage control module can regulate the magnitude of feedback voltage according to comparison information transmitted by the microcomputer processing module, and then the heating voltage control module can transmit the feedback voltage to the gas detection module, so that the working temperature of the probe is controlled, the constant working temperature of the gas detection module is ensured, the influence of gas temperature change on pneumatic concentration detection accuracy is eliminated and the stability of the probe is ensured.

Description

technical field [0001] The invention relates to the field of gas measurement, in particular to a constant temperature probe. Background technique [0002] Gas probes, that is, gas monitoring probes, also known as solid gas detectors, are used in conjunction with gas monitoring controllers. Gas probes are currently widely used in various biochemical laboratories. Because various chemical gases are produced during chemical experiments, When the concentration of the chemical gas exceeds a certain ratio, the chemical gas will have a bad impact on the health of the experimenters. Usually, a gas probe is installed in the fume hood for the chemical experiment to monitor the chemical gas in the laboratory online in real time. Monitoring, when there is a leak or danger will occur, remind the relevant personnel to take relevant measures to protect the personnel working on the site. At present, the common gas probes are usually composed of sensors and related circuits. Traditional gas ...

AI Technical Summary

Problems solved by technology

[0002] Gas probes, that is, gas monitoring probes, also known as solid gas detectors, are used in conjunction with gas monitoring controllers. Gas probes are currently widely used in various biochemical laboratories. Because various chemical gases are produced during chemical experiments, When the concentration of the chemical gas exceeds a certain ratio, the chemical gas will have a bad impact on the health of the experimenters. Usually, a gas probe is installed in the fume hood for the chemical experiment to monitor the chemical gas in the laboratory online in real time. Monitoring, when there is a leak or danger will occur, remind the relevant personnel to take relevant measures to protect the personnel working on the site. At present, the common gas probes are usually composed of sensors and related circuits. Traditional gas probes are generally composed of gas sensors and microprocessors. Composition, however, there is a common problem in the common gas probes nowadays, that is, they are greatly affected by the ambient temperature. Once the gas temperature changes, the internal temperature of the gas probe will also be affected accordingly. In this way, the detected gas concentration data Relatively speaking, there will be a large error, and considering the particularity of ventilation required in chemical experiments, general chemical laboratories will conduct chemical experiments in fume hoods, so that toxic chemical gases can be discharged immediately, so that during ventilation, the fan The driven wind will not only take away the chemical gas, but also take away the heat, which will cause the working temperature of the gas probe to change, resulting in errors in measurement

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