CN103376191A

CN103376191A - Intelligent multi-channel leakage and breakage detection system

Info

Publication number: CN103376191A
Application number: CN2012101183299A
Authority: CN
Inventors: 张勇; 李军
Original assignee: Shanghai Hua Hong NEC Electronics Co Ltd
Current assignee: Shanghai Huahong Grace Semiconductor Manufacturing Corp
Priority date: 2012-04-20
Filing date: 2012-04-20
Publication date: 2013-10-30

Abstract

The invention discloses an intelligent multi-channel leakage and breakage detection system. The intelligent multi-channel leakage and breakage detection system comprises a leakage detector, a breakage warning circuit, a single-chip computer and a liquid crystal display panel integrated controller. A plurality of intelligent sensors are adopted to construct the bus-based intelligent multi-channel leakage and breakage detection system based on an MCU, independent monitoring is conducted on a plurality of independent sensing channels, water leakage can be found and controlled timely and reliably, and the defects of a traditional decentralized water leakage detection system are overcome effectively.

Description

Multi-channel intelligent leakage and broken wire detection system

Technical field

The present invention relates to integrated circuit and make the field, particularly relate to a kind of multi-channel intelligent leakage and broken wire detection system.

Background technology

Modernization factory building (for example semiconductor factory) is mounted with numerous sophisticated electronicses, in case leak, can consist of sizable harm.

At present, factory generally adopts the distributing water leakage detection system, its water leakage alarm sensor mostly is stand alone type, therefore, when construction system (being generally traditional DCS system), need a large amount of cable and independent current source, in use also need personnel regularly to patrol, labor intensive not only, and can not effectively control alert, and can not accomplish real-time response for the generation of accident, do not possess in addition the burn out detection function yet.

Summary of the invention

The technical problem to be solved in the present invention provides a kind of multi-channel intelligent leakage and broken wire detection system, and its reaction is fast, indicate clearly, can effectively control the alert that electronic equipment leakage and the line of induction rupture.

For solving the problems of the technologies described above, multi-channel intelligent leakage of the present invention and broken wire detection system include:

The leakage detector is connected with single-chip microcomputer by bus, for detection of the leakage situation of electronic equipment;

The break alarm circuit is used for sending alerting signal when the line of induction fracture of leakage detector;

Single-chip microcomputer is used for the level that each leakage detector of Real-Time Monitoring is exported, and judges to have or not according to the situation of change of level the leakage alert occurs, and sends alerting signal when the leakage alert occurs, and the fail address code is sent to the liquid crystal panel Centralized Controller;

The liquid crystal panel Centralized Controller is connected with single-chip microcomputer, is used to indicate the channel number that leakage occurs.

The present invention consists of the leakage of bus type multi-channel intelligent and broken wire detection system based on MCU with a plurality of intelligence sensors, a plurality of independent line of induction passages are independently monitored, not only can find to leak in time, reliably alert, and can realize the monitoring of factory building extensive area, thereby effectively overcome the disadvantage of traditional distributing water-leakage detecting system.

Description of drawings

Fig. 1 is the multi-channel intelligent leakage of the embodiment of the invention and the structural representation of broken wire detection system.

Fig. 2 is the MCU hardware line graph of the embodiment of the invention.

Fig. 3 is the broken string circuit working principle schematic of the embodiment of the invention.

Fig. 4 is the MCU processing flow chart of the embodiment of the invention.

Fig. 5 is the detector that leaks of the embodiment of the invention.

Fig. 6 is the MCU of the embodiment of the invention.

Fig. 7 is the touch-screen of the embodiment of the invention.

Embodiment

Understand for technology contents of the present invention, characteristics and effect being had more specifically, existing in conjunction with illustrated embodiment, details are as follows:

Multi-channel intelligent leakage and the broken wire detection system of the embodiment of the invention are comprised of leakage detector, MCU (Micro ControlUnit, micro-control unit claim again single-chip microcomputer) and liquid crystal panel Centralized Controller, as shown in Figure 1.Wherein:

The leakage detector is arranged on the leakage monitoring point of production scene.The WR-NA that present embodiment adopts 3M company the to produce detector (seeing Fig. 5) that leaks can effectively detect resistance range at leak (according to measuring, the resistance of water is between 30～600k Ω) of 25～450k Ω.

The break alarm circuit is used for sending alerting signal when the line of induction fracture of leakage detector.Detector itself does not have the burn out detection function because 3MWR-NA leaks, when presence is answered thread breakage, original test function that leaks will lose efficacy, therefore, present embodiment has designed break alarm circuit as shown in Figure 3 on the 3MWR-NA detector basis that leaks, utilize the normally closed contact of relay to realize from lock control (being after warning circuit starts, only to cut off the electricity supply and to remove warning).

MCU is positioned at master-control room, is mainly used in the level of each leakage detector output of Real-Time Monitoring, the leakage alert is judged, and leakage alert alarm is being occured.The miniature FX2NC Programmable Logic Controller (PLC) that present embodiment adopts MIT to produce, as shown in Figure 6.The hardware line of MCU sees also Fig. 2, and it is the effector that data send, and also is the core of sensor intelligent.

The liquid crystal panel Centralized Controller is a touch-screen (seeing Fig. 7), is used to indicate the channel number that leakage occurs.

Below the concrete methods of realizing of above-mentioned multi-channel intelligent leakage and broken wire detection system is described in detail.

When there was liquid contact induction line the production scene, at first, the leakage detector was sounded and the LED light warning, reminded the field staff to hasten to process.Simultaneously, the leakage detector level of exporting to MCU changes.

MCU carries out three recheckings after monitoring the level variation, to prevent wrong report.After confirming to have the leakage alert to occur, MCU judges the address code of the leakage detector that sends warning immediately, and address code is sent to the liquid crystal panel Centralized Controller of master-control room, sends simultaneously sound and light alarm and the operation that resets is provided.

The liquid crystal panel Centralized Controller receives the address code that MCU sends, indicate the channel number that leakage occurs at liquid crystal panel, personnel in the master-control room just can see the particular location that alert occurs intuitively like this, thereby control timely and effectively the further deterioration of the situation of leaking.

Detection for broken string sees also Fig. 3.Among the figure, L is the line of induction of leakage detector, and when line of induction L was communicated with, circuit was connected, and V1 is saturated, the V2 cut-off, and the relay J no power, warning circuit is not worked.After line of induction L disconnected, the V1 cut-off made V2 saturated, the relay J energising, and normally opened contact K1 is closed, and normally closed contact K2 disconnects, and warning circuit work is reported to the police; At this moment, be communicated with such as the L that will break again, because V1 can not obtain the base stage bias current, circuit will be kept the state that V1 ends, V2 is saturated, so just realize the warning circuit auto-lock function; Simultaneously, the capacitor C in the circuit is the bypass of static electricity on human body's induced voltage, avoided line of induction L to disconnect after, runaway electric circuit when touching broken string with hand.

Claims

1. a multi-channel intelligent leakage and broken wire detection system is characterized in that, include:

2. detection system according to claim 1 is characterized in that, described leakage detector adopts is the 3M WR-NA detector that leaks.

3. detection system according to claim 1 is characterized in that, described break alarm main circuit will be made of the line of induction, triode, relay and the electric capacity of leakage detector.

4. detection system according to claim 1 is characterized in that, described single-chip microcomputer is the miniature FX2NC Programmable Logic Controller of Mitsubishi.

5. detection system according to claim 1 is characterized in that, described liquid crystal panel Centralized Controller is a touch-screen.