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Detection method and device for channel environment change

A technology of channel environment and detection method, applied in the direction of measurement device, sound wave re-radiation, radio wave measurement system, etc., can solve the problems of occupying the fire channel, affecting the escape of personnel, fire fighting and rescue, and checking the efficiency of the fire channel. The effect of evacuation and avoidance of abnormal use

Inactive Publication Date: 2019-04-19
ZHEJIANG TENDENCY TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although there are laws and regulations, there are still situations where fire exits are occupied, especially in corridors and shops. People always store items in fire exits, which narrows the width of fire exits and affects personnel escape and fire fighting and rescue.
[0004] Existing inspections of fire exits are very inefficient, and often can only rely on manual inspection, supplemented by relevant persons in charge of publicity and education, which is time-consuming and laborious. fire escape thing happens

Method used

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  • Detection method and device for channel environment change
  • Detection method and device for channel environment change
  • Detection method and device for channel environment change

Examples

Experimental program
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Effect test

Embodiment 1

[0032] Embodiment 1, with reference to attached Figure 1-3 , a detection method for a channel environment change, comprising the following steps:

[0033] S101: Obtain ultrasonic data detected under a preset background environment, where the ultrasonic data includes echo time and an echo intensity value corresponding to the echo time;

[0034] The traditional ultrasonic distance measuring device can only detect whether there is a reflected ultrasonic wave, that is, a reflected echo, after emitting the ultrasonic wave. Based on this principle, when the ultrasonic transmitter emits ultrasonic waves in a certain direction, it starts timing at the same time as the emission time. When encountering an obstacle on the way, the ultrasonic receiver will immediately stop timing to obtain the echo time. According to the formula of sound speed and echo time, the distance between the ultrasonic distance measuring device and the nearest object can be calculated. distance. The ultrasonic ...

Embodiment 2

[0059] Embodiment 2, with reference to attached Figure 4 , a method for detecting channel environment changes, applied to detection equipment for dedicated channel environment changes, comprising the following steps:

[0060] S201 Acquire ultrasonic data detected under a preset background environment.

[0061] S202 Determine control data according to the ultrasound data in a preset background environment.

[0062] S203 judges whether human body infrared sensing occurs, and if so, proceeds to the next step; in this embodiment, the detection triggers are divided into two types, one is passive triggering, the other is active triggering, and this step is passive triggering. If the background environment changes, there is a high probability that it is caused by human beings. If the detection equipment does not sense the infrared of the human body, the default environment will not change. If it senses the infrared of the human body, the background environment may change and needs ...

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Abstract

The invention relates to a detection method for channel environment change. The detection method comprises the following steps that ultrasonic data detected in a preset background environment is obtained, and the ultrasonic data comprises echo time and an echo intensity value; according to the ultrasonic data in the preset background environment, contrast data is determined; ultrasonic data detected in a current environment is obtained; according to the ultrasonic data detected in the current environment, target data is determined; the target data is compared with the contrast data; it is judged whether or not the change difference of the target data relative to the contrast data meets a preset condition, if yes, it is determined that the current environment changes compared with the preset background environment, and an alarm signal is sent. The detection method for the channel environment change has the advantages that the detection method can be applied to environment monitoring ofa fire fighting access, identify the changes of background objects in the environment, judge whether or not an obstacle exists in the fire fighting access or a normally closed type fireproof door is open, and send the alarm signal when detecting that the obstacle exists in the fire fighting access or the normally closed type fireproof door is open, thereby effectively avoiding the situation that the fire fighting access is occupied or the normally closed type fire door is not normally used.

Description

technical field [0001] The invention relates to the field of fire safety, in particular to a detection method and device for channel environment changes. Background technique [0002] Fire safety passages have important significance and functions in modern buildings, and are often called life passages. When a fire or other dangerous situation requires emergency evacuation of the crowd, the smoothness of the fire passages is to quickly extinguish the fire, save the lives and property of the people, and reduce fire losses. If the fire exit is occupied, it will bring major hidden dangers to the life and property of the owners of the community. [0003] Article 28 of my country's "New Fire Protection Law" stipulates that no unit or individual may occupy, block, or close evacuation passages, safety exits, and fire truck passages. Doors and windows in crowded places shall not be equipped with obstacles that affect escape and fire fighting and rescue. If there is any violation of...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01S15/88
CPCG01S15/88
Inventor 徐承柬李志新龚大国陈骋黄振川朱能辉
Owner ZHEJIANG TENDENCY TECH