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Temperature detection circuit, gas detection device and temperature detection method

A technology of temperature detection circuit and detection resistor, which is applied in the field of temperature detection circuit and gas detection device, which can solve the problems of gas overheating and achieve the effect of reducing heat generation and good sensitivity

Pending Publication Date: 2021-10-01
TDK CORPARATION
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

In these prior art documents 1-3, in order to improve the sensitivity of the gas detection device, the gas detection method uses a heater to heat the gas for detection, which will cause the gas to overheat

Method used

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  • Temperature detection circuit, gas detection device and temperature detection method
  • Temperature detection circuit, gas detection device and temperature detection method
  • Temperature detection circuit, gas detection device and temperature detection method

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no. 4 example

[0170] The third embodiment shows an arrangement using an H-bridge and a thermistor that is active in the case of state 1 and inactive in the case of state 2. However, a setup where the thermistor contributes to both State 1 and State 2 can be used. That is, both state 1 and state 2 circuit diagrams can include thermistors. As a fourth embodiment, a setting in which both state 1 and state 2 have thermistors will be described.

[0171] Figure 25 is a diagram showing a fourth embodiment. A thermistor is disposed in each of the first through fourth electrical paths. Wherein, it is assumed that the thermistor on the first electrical path is arranged adjacent to the thermistor on the fourth electrical path to function as a sensor. In addition, it is assumed that the thermistor on the second electrical path and the thermistor on the third electrical path are set as a measurement reference temperature. Wherein, the reference temperature is a temperature compared with the value ...

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PUM

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Abstract

The invention discloses a temperature detection circuit, a gas detection device and a temperature detection method. The temperature detection circuit comprises a thermistor, a timer IC, a fixed resistor, an electric connector, a first capacitor, a self-oscillation circuit, a low-pass filter, a differential amplifier and an A / D converter The gas detection device further comprises a heating device and a microcontroller. Through the connection and cooperation of the modules, the effective temperature detection circuit is provided, and the temperature detection circuit can be well used for gas detection.

Description

technical field [0001] The invention relates to a temperature detection, in particular to a temperature detection circuit, a gas detection device and a temperature detection method. Background technique [0002] In the prior art, a thermistor is an electronic component whose resistance changes with temperature. Therefore, thermistors are widely used to measure temperature. Typically, a thermistor is used to monitor the temperature inside a device so that the device can avoid overheating. However, prior art document 1 (WO2019 / 188692) proposes configuring a gas sensor using a thermistor, and the gas concentration can be acquired by using the thermistor to detect the temperature caused by combustion heat that varies with the gas. [0003] Although there is no definitive description of thermistors, there are other inventions available that measure gas concentrations through changes in resistance. For example, prior art document 2 (Japanese Patent Laid-Open No. 2002-156350) an...

Claims

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Application Information

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IPC IPC(8): G01K7/25G01N25/20
CPCG01K7/25G01N25/20
Inventor 濱村尚宏
Owner TDK CORPARATION