System and method for preventing false alarm of NDIR alarm apparatus

A technology of false alarms and alarms, applied in instruments, scientific instruments, measuring devices, etc., can solve problems such as unfavorable alarm user experience, decreased measurement accuracy and stability, and slow response speed

Pending Publication Date: 2020-05-01
CHENGDU QIANJIA TECH CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] However, in the actual gas measurement process, the sensor is often affected by factors such as temperature, air pressure, humidity, etc., resulting in a decrease in measurement accuracy and stability
Therefore, the existing technology adds a temperature and humidity sensor module inside the NDIR gas sensor to calibrate the measurement data, but this method has a slow response speed and does not output an alarm signal to remind the user, which is not conducive to the user experience related to the alarm.

Method used

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  • System and method for preventing false alarm of NDIR alarm apparatus
  • System and method for preventing false alarm of NDIR alarm apparatus

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Embodiment 1

[0031] The present invention is achieved through the following technical solutions, such as figure 1 As shown, a system for preventing false alarms of an NDIR alarm device includes an NDIR gas sensor, a temperature and humidity sensor, a controller, and an alarm module, wherein the NDIR gas sensor, the temperature and humidity sensor, and the alarm module are respectively electrically connected to the controller, wherein:

[0032] The NDIR gas sensor is used to detect the concentration of the measured gas and send the detected gas concentration to the controller in the form of an electrical signal.

[0033] The temperature and humidity sensor is electrically connected to the controller, used for detecting the temperature and humidity of the surrounding environment, and sending the detected temperature and humidity value to the controller in the form of an electrical signal.

[0034] The controller is used to receive the gas concentration data sent by the NDIR gas sensor, and t...

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Abstract

The invention relates to a system and method for preventing a false alarm of an NDIR alarm apparatus. The system comprises an NDIR gas sensor, a temperature and humidity sensor, a controller and an alarm module, wherein the NDIR gas sensor is used for detecting concentration of a detected gas and sending the detected gas concentration to the controller; the temperature and humidity sensor is usedfor detecting temperature and humidity of an ambient environment and sending the detected temperature and humidity to the controller; the controller is used for receiving data sent by the NDIR gas sensor and the temperature and humidity sensor and controlling start and stop states of the NDIR gas sensor according to the data sent by the temperature and humidity sensor as well as issuing an alarm instruction to the alarm module; the alarm module is used for giving an alarm according to the alarm instruction issued by the controller. In the system, the temperature and humidity sensor is extra added, and a method that whether the temperature and humidity sensor is in fault is judged is added, so as to guarantee the effect that the NDIR gas sensor can accurately detect the concentration of thedetected gas, and a user is prompted by virtue of the alarm when the temperature and humidity greatly influence detection on the concentration of the detected gas or the temperature and humidity sensor is in fault.

Description

technical field [0001] The invention relates to the technical field of preventing false alarms, in particular to a system and method for preventing false alarms of an NDIR alarm. Background technique [0002] NDIR (infrared gas sensor) adopts the method based on the gas absorption theory. After the infrared radiation emitted by the infrared light source is absorbed by the gas to be measured at a certain concentration, the spectral intensity proportional to the gas concentration will change, so that the spectrum can be obtained. The amount of change in intensity can invert the concentration of the gas to be measured. [0003] However, in the actual gas measurement process, the sensor is often affected by factors such as temperature, air pressure, humidity, etc., resulting in a decrease in measurement accuracy and stability. Therefore, in the prior art, a temperature and humidity sensor module is added inside the NDIR gas sensor to calibrate the measurement data, but this met...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N21/3504
CPCG01N21/3504
Inventor 牛富增赵勇张彬常关羽朱炼
Owner CHENGDU QIANJIA TECH CO LTD
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