CN1769878A

CN1769878A - Intelligent water leakage detection system for cooler of large-scale generator

Info

Publication number: CN1769878A
Application number: CN 200510009942
Authority: CN
Inventors: 薛荆岩; 巫红; 盖永成
Original assignee: Heilongjiang University
Current assignee: Heilongjiang University
Priority date: 2005-04-27
Filing date: 2005-04-27
Publication date: 2006-05-10
Anticipated expiration: 2025-04-27
Also published as: CN100395543C

Abstract

The invention discloses an intelligent leakage detecting system for large generator chiller, which comprises: ground-type leakage sensor 1, wall-type leakage sensor 2, intelligent data collector and main computer. It is characterized in that the leakage sensor 1 and leakage sensor 2 have gate electrodes made with printed circuit board coated with gold, when the gate electrodes get water, a certain resistor signal will be formed and enters the intelligent data collector, corresponding alert lighting tube is lightened and starts alert buzzer, by RS485 communication port, signals are transmitted to the main computer and displayed according to address codes, printed, recorded and formed production report and history.

Description

Intelligent water leakage detection system for cooler of large-scale generator

Technical field:

The present invention relates to a kind of set of equipments of intelligent water leakage detection system for cooler of large-scale generator, belong to the electromechanical intelligent device.

Technical background:

The refrigeratory of high-rating generator is positioned at the bottom of generator; area is big but narrow space is hidden; once when water leakage fault occurring; the operator on duty is difficult to timely discovery; more be difficult to determine its accurate position; by the time it is late that master-control room is found when the generator internal temperature raises, and is easy to cause great industrial accidents such as shutdown.

Summary of the invention:

The objective of the invention is to disclose a kind of intelligent water leakage detection system for cooler of large-scale generator.A plurality of ground type leakage sensors 1 are layered under the refrigeratory, a plurality of wall type leakage sensors 2 are attached on the wall of refrigeratory side-lower.Each leakage sensor all has the geocoding of oneself, also can be cascaded to by several leakage sensors and form a geocoding together.The leakage sensor of per 8 geocodings enters an intelligent data acquisition unit, and per 32 intelligent data acquisition units enter computing machine by the RS485 bus, promptly can discern 256 leakage sensors or cascade leakage sensor altogether.Like this, when generator cooler generation water leakage fault, computing machine can not only show, print, write down All Alerts at once and automatic production report and the historical record of forming, and can be by the geocoding of leakage sensor, where demonstrate refrigeratory leaks, so that the operator on duty also accurately finds leakage point fast, fix a breakdown, guarantee to produce normal operation.

The present invention is made up of ground type leakage sensor 1, wall type leakage sensor 2, intelligent data acquisition unit and host computer, it is characterized in that: described leakage sensor 1 and leakage sensor 2 are to be made into gate electrode by plating water golden seal brush wiring board, form certain resistance signal when receiving water droplet between the gate electrode and enter intelligent data acquisition unit.Described intelligent data acquisition unit is made up of components and parts such as comparer, driver, amplifier, single-chip microcomputer, warning luminotron, alarm buzzer, MAS485 chip, test key, clear key, acknowledgement key, sensitivity adjustment potentiometers, receive the resistance signal that the leakage sensor gate electrode transmits, carrying out corresponding warning luminotron by geocoding shows, and make the alarm buzzer sounding, be transferred to host computer by the RS485 communication port simultaneously and carry out by geocoding screen display, printing, record and formation production report and historical record.

Description of drawings:

Fig. 1 is an embodiment of the invention systematic schematic diagram;

Fig. 2 is No. 00 intelligent data acquisition unit schematic diagram of the embodiment of the invention;

Fig. 3 is embodiment of the invention leakage sensor (a 1) assembly drawing;

Fig. 4 is embodiment of the invention leakage sensor (a 1) circuit board drawing;

Fig. 5 is embodiment of the invention leakage sensor (a 2) assembly drawing;

Fig. 6 is embodiment of the invention leakage sensor (a 2) circuit board drawing;

Fig. 7 is embodiment of the invention leakage sensor (1) cascade graphs;

Fig. 8 is embodiment of the invention leakage sensor (2) cascade graphs;

Fig. 9 is No. 00 intelligent data acquisition unit software flow pattern of the embodiment of the invention;

Figure 10 is the A-A sectional view of Fig. 3;

Figure 11 is the side view of Fig. 6;

Figure 12 is the vertical view of Fig. 6.

Embodiment:

The present invention is by ground type leakage sensor 1, wall type leakage sensor 2, intelligent data acquisition unit and host computer are formed, when generator cooler generation water leakage fault, water droplet drips on the wall type leakage sensor 1 or along side wall and flows on the wall type leakage sensor 2, can produce a resistance signal on the leakage sensor gate electrode, resistance signal passes to intelligent data acquisition unit, intelligent data acquisition unit carries out sound and light alarm and is transferred to host computer by the RS485 communication port, host computer can not only show warning at once, print, record also forms production report and historical record automatically, and can be according to the geocoding of leakage sensor, demonstrating refrigeratory is where to leak, so that the operator on duty also accurately finds leakage point fast, fix a breakdown, guarantee to produce normal operation.

The present invention is made up of ground type leakage sensor 1, wall type leakage sensor 2, intelligent data acquisition unit and host computer, referring to Fig. 1.Intelligent data acquisition unit is made up of components and parts such as comparer, driver, amplifier, single-chip microcomputer, warning luminotron, alarm buzzer, MAS485 chip, test key, clear key, acknowledgement key, sensitivity adjustment potentiometers, referring to Fig. 2.Ground type leakage sensor 1 is made up of printed circuit board (PCB), stainless steel square tube, stainless steel bar, interior hexagonal stainless steel gong nail etc., referring to Fig. 3.Leakage sensor 1 printed circuit board (PCB) corrodes into gate electrode by the thick wiring board of 1.5mm, and plating water gold is to increase serviceable life, referring to Fig. 4 on gate electrode.Wall type leakage sensor 2 is made up of printed circuit board (PCB) and corrosion resistant plate, referring to Fig. 5.Leakage sensor 2 printed circuit board (PCB)s corrode into gate electrode by the thick wiring board of 1.5mm, and plating water gold is to increase serviceable life, referring to Fig. 6 on gate electrode.A plurality of ground type leakage sensors 1 can be cascaded into certain input port, road that a geocoding enters certain intelligent data acquisition unit again by aviation plug, referring to Fig. 7.A plurality of wall type leakage sensors 2 can be cascaded into certain input port, road that a geocoding enters certain intelligent data acquisition unit again by aviation plug, referring to Fig. 8.The software flow of single-chip microcomputer in the intelligent data acquisition unit is referring to figure the 9th.

The course of work

During the generator cooler operate as normal, it is infinitely great that the gate electrode resistance of leakage sensor is tending towards.When refrigeratory leaked, water droplet dripped on the ground type leakage sensor 1 or along side wall and flows on the gate electrode of wall type leakage sensor 2, and gate electrode resistance becomes several kilohms to tens megohms.This resistance signal enters the input end (+) that the intelligent data acquisition unit input end becomes voltage signal and enters comparer, make comparer output high level or low level signal after comparing with another input end (-) of comparer, this comparator output signal enters the input port P1 of single-chip microcomputer through driver drives.During no water droplet, the voltage ratio comparator input terminal (-) of comparator input terminal (+) is low on the leakage sensor, and the output terminal of comparer is a low level.When on the leakage sensor water droplet being arranged, it is high that the voltage ratio comparator input terminal (-) of comparator input terminal (+) is wanted, and the output terminal of comparer is a high level.The reference voltage signal of comparator input terminal (-) determined by the resistance position of " sensitivity adjustment potentiometer ", like this to the different pure degree of water droplet or leak what can detect.The switching signal of " test key ", " clear key ", " acknowledgement key " enters the input port P4 of single-chip microcomputer.The output P3 output alarm signal of single-chip microcomputer makes luminotron carry out alarm indication through driver drives.The delivery outlet P4 output alarm signal of single-chip microcomputer promotes the alarm buzzer sounding through amplifier.The SIO serial port of single-chip microcomputer send the information in the single-chip microcomputer on the RS485 bus and the host computer communication by the MAX485 chip.

The RS232 serial port of host computer obtains the warning message of No. 000 leakage sensor to 255 leakage sensor by " RS232/RS485 " converter and No. 00 to No. 31 intelligent data acquisition unit communication, All Alerts information is shown, prints, writes down and automatic production report and the historical record of forming, and according to the geocoding of leakage sensor, demonstrating refrigeratory is where to leak, so that the operator on duty finds leakage point quickly and accurately, fix a breakdown, guarantee to produce normal operation.

Claims

1. intelligent water leakage detection system for cooler of large-scale generator; Form by ground type leakage sensor (1), wall type leakage sensor (2), intelligent data acquisition unit and host computer, it is characterized in that: described leakage sensor (1) and leakage sensor (2) are to be made into gate electrode by plating water golden seal brush wiring board, form certain resistance signal when receiving water droplet between the gate electrode and enter intelligent data acquisition unit; Described intelligent data acquisition unit is made up of comparer, driver, amplifier, single-chip microcomputer, warning luminotron, alarm buzzer, MAS485 chip, test key, clear key, acknowledgement key, sensitivity adjustment potentiometer components and parts, receive the resistance signal that the leakage sensor gate electrode transmits, carrying out corresponding warning luminotron by geocoding shows, and make the alarm buzzer sounding, be transferred to host computer by the RS485 communication port simultaneously and carry out by geocoding screen display, printing, record and formation production report and historical record.