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Bus type combustible gas thickness detection device and its control method

A gas concentration detection and gas concentration technology, which is applied to measurement devices, material analysis by electromagnetic means, instruments, etc., can solve the problems of cumbersome debugging work, heavy wiring workload, and increased material consumption, and achieve convenient query, The effect of long service life and easy centralized monitoring

Inactive Publication Date: 2008-07-02
SHENYANG INST OF AUTOMATION - CHINESE ACAD OF SCI
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Problems solved by technology

[0004] In order to overcome the disadvantages in the prior art that the installation and wiring workload is large, the material consumption increases sharply with the increase of detection points, and the debugging work is very cumbersome when using detectors in the prior art, the purpose of the present invention is to provide an accurate, safe and A bus-type combustible gas concentration detection device capable of realizing networked detection and its control method

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  • Bus type combustible gas thickness detection device and its control method
  • Bus type combustible gas thickness detection device and its control method
  • Bus type combustible gas thickness detection device and its control method

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Embodiment Construction

[0043] The present invention will be described in further detail below in conjunction with the accompanying drawings and embodiments.

[0044] Such as figure 1 , shown in Fig. 2, the present invention is made up of following parts:

[0045] The gas concentration detection part includes: the detection probe U17, which is connected to the constant current source formed by the power module U12 and the second resistor R02. This embodiment adopts the catalytic combustion detection probe U17 and the high-precision A / D converter U3, and the output signal is connected to The control part is used to detect the concentration of combustible gas, and its resistance value changes linearly with the gas concentration; the first resistor R01 is connected between the second resistor R02 and the power supply end of the detection probe U17, and the two ends of the first resistor R01 are connected to the Two input ends of A / D converter U3 (the present embodiment is the 3rd, 4th input pins AIN3, ...

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Abstract

The invention relates to a bus-type flammable gas concentration detection device and a control method thereof. The device comprises a gas concentration detection portion connected with the detection input terminal of a control portion; the control portion including a microprocessor loaded with a control program for receiving a detection signal from the gas concentration detection portion and outputting to a display portion and an alarm portion; the display portion connected with the display output terminal of the control portion; the operation portion connected with the operation input terminal of the control portion; an alarm output portion with a sound alarm device coupled with the alarm output terminal of the microprocessor through a photoelectric coupler; and a bus interface portion with a bus communication module for emitting information of the microprocessor in the control portion to a bus. The method comprises the steps of initializing the device, detecting the concentration of a flammable gas, and serially communicating with an upper controller at any time. The invention achieves network concentration detection of flammable gas, high measurement accuracy, high explosion-proof performance and large amount of display information.

Description

technical field [0001] The invention relates to a gas concentration detection device, in particular to a bus-type combustible gas concentration detection device and a control method thereof which realize the functions of combustible gas concentration detection and alarm display. Background technique [0002] In industrial production and daily life, various combustible gases are often used. In order to ensure the safety of life and property, it is usually necessary to monitor the concentration of combustible gases in occasions involving the use of combustible gases. In some important areas, real-time detection of the concentration of combustible gases is required to monitor that it does not exceed the critical value, so as to ensure the safety of daily production and life. [0003] Currently commonly used combustible gas detectors are mainly divided into hand-held detectors, single-point detectors, and multi-point detectors. Handheld detectors are mainly used for daily safet...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N35/00G01N27/00G08B21/16
Inventor 史勃朱军张环宇吴景辉
Owner SHENYANG INST OF AUTOMATION - CHINESE ACAD OF SCI
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