Maihuang Technology MH-GXJ pipeline leakage monitoring system

1. System Overview

In order to reduce the water hammer effect and ensure the safety of the water supply system,a water hammer protection system needs to be installed. This includes a set of water supply network leakage detection pipeline leakage monitoring system,which includes hydrophones,high-frequency pressure sensors,data acquisition and transmission equipment RTU and software,etc.,using piezoelectric ceramic hydrophones arranged on the pipelines Monitor pipe network leakage noise,determine the location and size of leak points through analysis of acoustic signal processing,and use positioning algorithms and pattern recognition algorithms to accurately locate them. Piezoelectric ceramic hydrophones serve as front-end sensors and provide front-end data wireless network transmission technology for pipeline on-site automation,seamlessly linking pipeline on-site automation data collection and control centers.

2. Technical parameters

1. Hydrophone

Working frequency range: 20Hz～50kHz

Low frequency sensitivity: -172dB Vre: 1V/μPascal

Horizontal directivity:

Working depth: 500 meters

Working temperature: -40~80°C

Withstand static pressure: 68Bar

Low noise,high durability,requires submersion in water

2. High frequency pressure sensor

Sampling frequency: 64/128/256Hz to meet analysis needs

Range: 0~300 psia,needs to meet negative pressure monitoring;

Accuracy: ≤0.1%FS

Response time: ≤1ms

Voltage: 5V+/-0.5V

Output signal: 0-30/100mV

Working temperature: -40℃～80℃

Withstand static pressure: 68Bar

Material: stainless steel isolation diaphragm

Protection level: IP68

3. Data collection and transmission (RTU):

RTU is an installation and on-site device. It is an integrated terminal module that integrates power supply,data acquisition,wireless communication and other modules. It can choose different shapes according to the on-site construction conditions. Sensor collection and communication interruption The built-in power conversion module,wireless communication module,and satellite signal receiving module can provide power to hydrophones and pressure sensors and collect signals. After preliminary signal analysis and processing,they are sent to the monitoring center server through the wireless network.

Analog input 6 channels,can be connected to 0-5V/0-20mA/4-20mA

Sampling bits: 16 bits,audio can be collected

The sampling rate is up to 100kHz. The rate can be set to wireless communication 4G downward covering 2G/3G. It has a SIM card interface,supports optical fiber communication,is equipped with a serial port server,and supports general Ethernet protocols such as Profinet.

Wired communication RS485 2 channels,supports MODBUS

Automatic time correction GPS/Beidou accuracy 1pps

Built-in battery Lithium battery After the external power supply fails,it can meet the requirements of on-site equipment operation for at least one month. External power supply 9-36V DC can meet the output voltage of solar power supply device. External power supply can be: 12VDC,and the built-in power supply can be automatically switched through software.

4. Monitoring software

(1) Basic functions of the system

System basic interface

The bottom layer of the system uses basic geographical information layer data,and layers such as pipe network data and site data are loaded on top of the basic geographical information layer to realize an information system based on map display.

(2) System alarm function

The system provides a fully automated alarm tool. Through a series of machine learning and data analysis,the system feeds back abnormal data events on the pipeline network to the monitoring personnel in the form of alarms. The monitoring personnel combine the alarm information given by the system with the actual pipeline network operations. Evaluate the alarm information according to the situation,discover leaks,pipe bursts,pipe network pressure transients and other abnormal situations in the shortest possible time and intervene.

(3) Sonar data browser function

Users can analyze the collected acoustic data of the pipe network through the sonar data browser.

(4) Pressure transient analysis function

The pressure transient analysis module is used to count pressure transients generated in the pipeline network and analyze and locate the sources of these transients.

(5) Network coverage analysis capabilities

The network coverage analysis module is used to view the approximate monitoring range of a single or multiple sensors combined,thereby assisting monitoring personnel in site deployment analysis and alarm range analysis.

(6) Leakage event library function

The leak event database can record the discovered leak points and mark them on the map to facilitate later query and statistics. The system provides a page for recording leakage events. You can enter the event,location,size of the leakage,description of the leakage,and locate it on the map. After selecting the query area,the system will display the missing point mark on the map. The user can click the missing point mark to view the detailed information of the missing point.

3. Meaning of use

Water supply network leakage detection pipeline leakage monitoring system monitors the operation of pipelines in real time. When a pipeline leak occurs,the location of the leak can be discovered and determined in time,so that emergency treatment can be carried out promptly and effectively,and the economic losses caused by pipeline leakage can be controlled and reduced,which has obvious economic and social benefits.

The system introduces advanced signal processing,pattern recognition and artificial intelligence technology to improve the sensitivity,reliability and stability of the pipeline leakage monitoring system and reduce the false alarm rate. It is currently a relatively advanced pipeline leakage monitoring technology and is no better than foreign ones. Poor equipment.

The company also provides distributed optical fiber pipeline leakage monitoring systems,optical fiber hydrophone pipeline leakage monitoring systems and other solutions to choose from.