A flammable and explosive gas detection device
A technology for flammable and explosive gases and detection devices, which is applied in the direction of measuring devices, instruments, scientific instruments, etc., can solve the problems of low detection sensitivity and accuracy, overheating and overloading of gas sensor components, so as to improve sensitivity and prolong service life , Improve the effect of measurement accuracy
Active Publication Date: 2017-04-26
FUJIAN MEIYING AUTOMATION TECH
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Problems solved by technology
[0004] The invention proposes a flammable and explosive detection device, which solves the problems that the existing detection equipment collects the voltage of the sampling resistor, which leads to low detection sensitivity and accuracy, consumes power on the sampling resistor, and has the risk of overheating and overloading the gas sensor.
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[0020] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.
[0021] Such as figure 2 A flammable and explosive gas detection device shown includes a sensor 1, a processor 2, a controlled current generator 3 and an acousto-optic alarm device 4, the sensor 1 includes a temperature sensor and a gas sensor, and the gas sensor will collect the gas The concentration is converted into a voltage signal, the temperature sensor feeds back the temperature signal of the gas sensor to the processor, the processor 2 compares the inp...
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The invention discloses a combustible and explosible gas detection device which comprises a sensor (1), a processor (2), a controlled current generator (3) and a sound-light alarming device (4). Voltage and temperature signals generated by the sensor (1) are fed back to the processor (2), an input signal of the sensor (1) is compared with a reference value through the processor (2), an output value of the processor (2) is transmitted to the controlled current generator (3) and the sound-light alarming device (4), and a controlled current generated by the controlled current generator (3) is input to the sensor (1). Compared with a traditional device, the combustible and explosible gas detection device has the advantages that only a few of commonly used components need to be added, the cost is low, and the combustible and explosible gas detection sensitivity and accuracy can be greatly improved; in addition, by using the method, the power consumed by a sampling resistor can be reduced, and the overheating and overloading risks of a gas-sensitive element itself can be avoided.
Description
technical field [0001] The invention relates to a gas detection device, in particular to a flammable and explosive gas detection device. Background technique [0002] In terms of flammable and explosive gas detection technology, the current domestic gas detectors are still adopting technologies that should have been eliminated long ago. exhibit different resistance characteristics. Connect the gas sensor and a sampling resistor in series, add a constant voltage, the voltage on the sampling resistor can reflect the change of gas concentration, such as figure 1 shown. This method is simple in structure and low in cost, but the detection device formed by this method has many flaws. First of all, the resistance of the gas sensor varies in a very large range (the resistance value can vary from 3K to more than 8K at different temperatures, and the concentration can make the resistance value change by more than 8 times), so that the detection signal strength varies greatly, resu...
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IPC IPC(8): G01N33/00G08B21/16
Inventor 董斌林燕金颜玉崇
Owner FUJIAN MEIYING AUTOMATION TECH