CN205300879U

CN205300879U - Detection alarm system of leaking

Info

Publication number: CN205300879U
Application number: CN201521042785.5U
Authority: CN
Inventors: 李英; 王宝珍; 赵明霞
Original assignee: Shangluo University
Current assignee: Shangluo University
Priority date: 2015-12-14
Filing date: 2015-12-14
Publication date: 2016-06-08
Anticipated expiration: 2025-12-14

Abstract

The utility model discloses a detection alarm system of leaking, including leaking sensor, singlechip, alarm device, nixie display, button, drive circuit and solenoid valve, leak the sensor signal transmission terminal with the singlechip is connected, the control signal output of singlechip passes through drive circuit with the solenoid valve is connected, the alarm signal output of singlechip with alarm device connects, the display the signal output end of singlechip with nixie display connects, the button with the control input end of singlechip is connected. Compared with the prior art, the utility model discloses can the selected regional accident of automated inspection leak to accompany acousto -optic warning, indicate the incident of leaking that appears, if owner is not in, the function of self -closing water intaking valve reduces the deterioration of the situation of leaking in addition, can prevent effectively that various losses from further enlarging, has the value of popularization and application.

Description

A kind of water leakage detection warning system

Technical field

This utility model relates to a kind of electronic alarm device, particularly relates to a kind of water leakage detection warning system.

Background technology

At present, both at home and abroad to leaking systematic research mainly in water supply network leakage loss. Main present Research is as follows: current domestic Running-water Company adopts traditional leak detection method sonic detection mostly. The advantage of this method is for concrete leak source contrast locating relatively effectively (microcosmic aspect), and shortcoming is to have certain limitation for control of leaking (macroscopic view aspect). The principle of sonic detection be by detect artesian water from leak source ejection the noise that produces determine whether pipeline leaks and the position of leak source. External leak water detdction technology is gone on along in the front in the world, and along with the development in epoch, leak water detdction technology is also becoming better and better of development, and more advanced is the correlation between in leak detection method comparatively speaking. Correlation detection was researched and developed by Britain Water Research Center in nineteen sixty. Along with the beginning of Britain's research and development, Japan slowly, France also develops the leakage water tester of oneself. In the eighties in 20th century, abroad starting mutually to pay close attention to have studied pipe leakage detection technique, and leak water detdction technology is increasingly advanced, what test longest distance in numerous external countries is Germany, up to 3.5km. The reliability of small opening detection is higher than 90%. For 80% small opening being detected above, the degree of accuracy of its location reaches �� lm.

From this, each state all resolves, in the leakage water tester of exploitation detection water system, to use unsuitable for household. Market also has the water-leakage alarm of domestic, but only has warning function, if owner stays out, just have no idea to process. Therefore a kind of water leakage detection warning system is designed.

Utility model content

The purpose of this utility model is that provides a kind of water leakage detection warning system to solve the problems referred to above.

This utility model is achieved through the following technical solutions above-mentioned purpose:

This utility model includes leakage sensor, single-chip microcomputer, alarm device, nixie display, button, drive circuit and electromagnetic valve, the signal transmission ends of described leakage sensor is connected with described single-chip microcomputer, the control signal outfan of described single-chip microcomputer is connected with described electromagnetic valve by described drive circuit, the alarm signal output ends of described single-chip microcomputer is connected with described alarm device, the display signal output part of described single-chip microcomputer is connected with described nixie display, and described button is connected with the control input of described single-chip microcomputer.

Specifically, described single-chip microcomputer is the single-chip microcomputer of model STC89C52;Described leakage sensor adopts the voltage comparator of model LM393 to be main control chip.

The beneficial effects of the utility model are in that:

This utility model is a kind of water leakage detection warning system, compared with prior art, this utility model can detect the accidental water leakage of selection area automatically, and with sound and light alarm, the event of leaking that prompting occurs, if owner stays out, also has the function being automatically switched off water intaking valve, reduce the deterioration of situation of leaking, various loss can be effectively prevented and expand further, there is the value of popularization and application.

Accompanying drawing explanation

Fig. 1 is structural principle block diagram of the present utility model;

Fig. 2 is the circuit structure schematic diagram of leakage sensor of the present utility model;

Fig. 3 is voltage comparator pin distributor of the present utility model;

Fig. 4 is solenoid valve control circuit schematic diagram of the present utility model;

Fig. 5 is alarm device circuit theory diagrams of the present utility model.

Detailed description of the invention

Below in conjunction with accompanying drawing, the utility model is described in further detail:

As shown in Figure 1: this utility model includes leakage sensor, single-chip microcomputer, alarm device, nixie display, button, drive circuit and electromagnetic valve, the signal transmission ends of described leakage sensor is connected with described single-chip microcomputer, the control signal outfan of described single-chip microcomputer is connected with described electromagnetic valve by described drive circuit, the alarm signal output ends of described single-chip microcomputer is connected with described alarm device, the display signal output part of described single-chip microcomputer is connected with described nixie display, and described button is connected with the control input of described single-chip microcomputer. Button is controlled by P3.2 mouth, and nixie display is divided into common-anode charactron and common cathode charactron, and single-chip microcomputer connects common cathode charactron, and high level drives, and electric current is too little, so drive circuit must be added, the numeral otherwise shown is too dark; Connecing common-anode charactron, low level drives, and brightness is big. Native system selects common-anode charactron, and low level is bright, controls charactron with P2 mouth, and P2 mouth has pull-up resistor, so digital pipe display circuit need not another connecting resistance again.

Specifically, described single-chip microcomputer is the single-chip microcomputer of model STC89C52; Described leakage sensor adopts the voltage comparator of model LM393 to be main control chip. STC89C52 is a kind of low-power consumption, high-performance CMOS 8 8-digit microcontroller, has 8K in-system programmable components flash storage. STC89C52 uses classical MCS-51 kernel, but having done a lot of improvement makes chip have the function that traditional 51 single-chip microcomputers do not possess, have 8 bit CPUs and the in-system programmable components Flash of dexterity so that STC89C52 is used widely in numerous embedded Control application systems. Its instruction system and 8051 traditional system compatibles, reduce the difficulty of Design of System Software, and circuit design is simple, cheap.

The operation of each peripheral components of single-chip microcomputer STC89C52 is all with clock control signal for benchmark, and without any confusion, the work clapped, therefore, clock frequency directly affects the speed of single-chip microcomputer, and the quality of clock circuit also directly affects the stability of Single Chip Microcomputer (SCM) system. The crystal oscillating circuit of native system selects the circuit of internal clocking mode, selects the crystal oscillator of 11.0592Hz. Reset circuit adopts key reset circuit.

STC89C52 element circuit mainly completes the functions such as the monitoring of whole system, judgement, controlling alarm and human-computer interactive control. The state of leakage sensor is detected by the parallel port I/O mouth P1.7 of single-chip microcomputer STC89C52, and buzzer alarm circuit and P2 mouth control digital pipe display circuit is controlled by P1.5 mouth, control drive circuit by P1.3 mouth simultaneously and then control the break-make of water intaking valve.

As shown in Figure 2: 2HEADER connects two pins of leakage sensor, when not leaking, two electrodes of leakage sensor disconnect, the voltage of the INA+ voltage more than INA-, and OUTA exports high level; When leaking, two electrode conductions of leakage sensor, are equivalent to a resistance, at this moment the voltage of INA+ and the voltage of INA-are compared, R2 is the slide rheostat of a 10k, by changing the resistance of slide rheostat, thus it is possible to vary the voltage of INA-, when voltage lower than INA-of the voltage of INA+, output low level, the effective resistance of R2 is more big, and the voltage of INA-is more little, and the precision of sensor detection circuit is more low. D1 is power supply indicator, and D2 is leak water detdction display lamp, and when leaking, D2 is bright.

As shown in Figure 3: LM393 is by the integrated circuit that two independent, high-accuracy voltage comparator forms, and offset voltage is low, is 2.0mV to the maximum. Voltage comparator LM393 operation principle: LM393 is made up of two voltage comparators, here the principle of is only introduced, for comparator A, the voltage of INA-is reference voltage, the voltage of INA+ is for comparing voltage, and when voltage more than INA-of the voltage of INA+, OUTA exports high level, during the voltage of the INA+ voltage less than INA-, OUTA output low level.

As shown in Figure 4: relay is normally open in cold situation, the water intaking valve selected in circuit is also normally opened water intaking valve, and when not having electric current to flow through, water intaking valve is opened, and when there being electric current, water intaking valve is closed. When P1.3 is low level, audion ends, and the voltage at relay two ends is equal, and relay switch disconnects, thus water intaking valve is in open mode; When P1.3 is high level, triode ON, the voltage at relay two ends is not desired to, the switch adhesive of relay, thus water intaking valve is closed. It is to say, when P1.3 is low level, water intaking valve is opened; When P1.3 is high level, water intaking valve is closed.

As shown in Figure 5: buzzer is divided into active buzzer and passive buzzer, and active buzzer has been internally integrated multivibrator, it is only necessary to just can sounding plus necessary DC level in outside; Without concussion source inside passive buzzer, it is necessary to by the square wave drive of 2K-5K. Native system selects the active buzzer of 5V, and it drives and control circuit is very simple. Selecting 8550 audions to drive buzzer, when P1.5 is high level, audion ends, and buzzer is not reported to the police; When P1.5 is low level, triode ON, buzzer warning.

Of the present utility model ultimate principle and principal character and of the present utility model advantage have more than been shown and described. Skilled person will appreciate that of the industry; this utility model is not restricted to the described embodiments; described in above-described embodiment and description is that principle of the present utility model is described; under the premise without departing from this utility model spirit and scope; this utility model also has various changes and modifications, and these changes and improvements both fall within the scope of claimed this utility model. This utility model claims scope and is defined by appending claims and equivalent thereof.

Claims

1. a water leakage detection warning system, it is characterized in that: include leakage sensor, single-chip microcomputer, alarm device, nixie display, button, drive circuit and electromagnetic valve, the signal transmission ends of described leakage sensor is connected with described single-chip microcomputer, the control signal outfan of described single-chip microcomputer is connected with described electromagnetic valve by described drive circuit, the alarm signal output ends of described single-chip microcomputer is connected with described alarm device, the display signal output part of described single-chip microcomputer is connected with described nixie display, and described button is connected with the control input of described single-chip microcomputer.

2. water leakage detection warning system according to claim 1, it is characterised in that: described single-chip microcomputer is the single-chip microcomputer of model STC89C52.

3. water leakage detection warning system according to claim 1, it is characterised in that: described leakage sensor adopts the voltage comparator of model LM393 to be main control chip.