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Non-invasive fire hydrant water pressure detection method based on time-delay accumulation of multiple ultrasonic signals

A technology of ultrasonic signal and water pressure detection, which is applied in the direction of fluid pressure measurement, sound wave re-radiation, and measurement devices using acoustic methods. It can solve the problems of low measurement accuracy and unstable measurement results, and achieve low price and low cost. The effect of performance requirements

Active Publication Date: 2022-05-20
ZHEJIANG UNIV OF TECH
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Problems solved by technology

The technical route and direction of the above achievements are correct, but there are still problems such as low measurement accuracy and unstable measurement results, which need to be further improved

Method used

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  • Non-invasive fire hydrant water pressure detection method based on time-delay accumulation of multiple ultrasonic signals
  • Non-invasive fire hydrant water pressure detection method based on time-delay accumulation of multiple ultrasonic signals
  • Non-invasive fire hydrant water pressure detection method based on time-delay accumulation of multiple ultrasonic signals

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Embodiment 1

[0072] This embodiment provides a non-invasive fire hydrant water pressure detection method based on the time-delay accumulation of multiple ultrasonic signals, such as figure 1 shown, including:

[0073] S1. Using the ultrasonic transducer to generate multiple frequency-agile ultrasonic longitudinal wave sinusoidal excitation signals as input to detect ultrasonic signals;

[0074] S2. Obtain all reflected echo signals and transmitted echo signals corresponding to the input detection ultrasonic signal;

[0075] S3. Accumulating time delay intervals of all acquired reflected echo signals and transmitted echo signals;

[0076] S4. Accumulate the transmission distance difference between all acquired reflected echo signals and transmitted echo signals;

[0077] S5. Estimate the accumulated delay interval and transmission distance difference to obtain the ultrasonic wave velocity, and correct the obtained ultrasonic wave velocity;

[0078] S6. According to the corrected ultrason...

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Abstract

The invention discloses a non-interventional fire hydrant water pressure detection method based on time-delay accumulation of multiple ultrasonic signals, comprising steps: S1. Using an ultrasonic transducer to generate multiple frequency-agile ultrasonic longitudinal wave sinusoidal excitation signals as input to detect ultrasonic signals; S2 . Acquire all reflected echo signals and transmitted echo signals corresponding to the input detection ultrasonic signal; S3. Accumulate the time delay interval of all acquired reflected echo signals and transmitted echo signals; S4. Accumulate all acquired reflected echoes The transmission distance difference between the signal and the transmitted echo signal; S5. Estimate the accumulated delay interval and transmission distance difference to obtain the ultrasonic wave velocity, and correct the obtained ultrasonic wave velocity; S6. Detect the water pressure of the fire hydrant according to the corrected ultrasonic wave velocity. The invention can realize the non-intervention, real-time, accurate, convenient, fast, efficient and cheap fire hydrant water pressure detection, and meets the practical application requirements of the fire hydrant water pressure detection.

Description

technical field [0001] The invention relates to the technical field of non-invasive pressure detection, in particular to a non-invasive fire hydrant water pressure detection method based on time-delay accumulation of multiple ultrasonic signals. Background technique [0002] In urban buildings, fire hydrants are generally deployed on each floor. When a fire occurs, the fire hydrants are required to provide pressure water flow that meets the requirements of the code in time to extinguish the fire in time. Property management personnel conduct daily inspections and registration of fire hydrants every day. However, most of the daily inspections are only to check the appearance of fire hydrants, and there is no detection method and means for the water supply pressure of fire hydrants in the most critical link. Therefore, when a fire breaks out, news reports that the water pressure of the fire hydrant water supply is not enough or even can not supply water are not uncommon. In o...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01L11/06G01S15/06A62C37/50
CPCA62C37/50G01L11/06G01S15/06Y02A90/30
Inventor 杨玉兰陈亚文邰惠鑫沈黎刘灵芝仲利强
Owner ZHEJIANG UNIV OF TECH
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