CN201906388U

CN201906388U - Wireless water leakage monitoring circuit for fire hydrant

Info

Publication number: CN201906388U
Application number: CN2010206654425U
Authority: CN
Inventors: 吴贵森
Original assignee: Individual
Current assignee: Individual
Priority date: 2010-12-17
Filing date: 2010-12-17
Publication date: 2011-07-27
Anticipated expiration: 2020-12-17

Abstract

The utility model relates to a wireless water leakage monitoring circuit for a fire hydrant. A water level sensor A and a water level sensor B are respectively installed at the inner part and on a surface of the fire hydrant; output ends of the water level sensors are connected to a Schmidt trigger circuit consisting of a base circuit U3, a resistor R2 and a capacitor C1; an output signal of the Schmidt trigger circuit is transmitted to a singlechip U1, is controlled through the singlechip U1, and is output to an FDD (frequency division duplex)-5 transmitting module U2; the FDD-5 transmitting module U2 is connected with an antenna, and transmits a modulated high-frequency electromagnetic wave to a JDD-5 receiving module U4; a CPA audio signal output end of the JDD-5 receiving module U4 controls and drives a loudspeaker Y; and a data output end outputs electrical level to control and drive a light emitting diode LED1. The wireless water leakage monitoring circuit performs remote monitoring on the fire hydrant, adopts simple structure and has stable and reliable performance.

Description

The fire hydrant wireless monitor circuit that leaks

Technical field

The utility model relates to the supervisory circuit field, particularly relates to a kind of fire hydrant wireless monitor circuit that leaks.

Background technology

The source of the main water intaking when fire hydrant is fire-fighting fire extinguishing, fire hydrant can cause water waste as too high because of hydraulic pressure or when being broken by object, and when fire extinguishing lack of water and cause bigger disaster.

The utility model content

The purpose of this utility model is to overcome the deficiencies in the prior art, and a kind of fire hydrant wireless monitor circuit that leaks is provided.

The technical scheme that the utility model adopted is such: the fire hydrant wireless monitor circuit that leaks, with level sensor A, it is inner and surperficial that B is installed on fire hydrant respectively, its output is connected to by time base circuit U3, resistance R 2, capacitor C 1 is formed executes close circuits for triggering, the output signal of executing close circuits for triggering is delivered to single-chip microcomputer U1, output to FDD-5 transmitter module U2 by single-chip microcomputer U1 control, FDD-5 transmitter module U2 connects antenna JDD-5 receiver module U4 is launched modulated frequency electromagnetic waves, the CPA audio signal output end control of JDD-5 receiver module U4 drives loudspeaker Y, and the control of data output end output level drives LED 1.

By adopting the aforementioned techniques scheme, the beneficial effects of the utility model are: this circuit adopts level sensor, executes composition wireless monitor warning circuits such as close thing circuits for triggering, single chip machine controlling circuit, wireless transmitter module circuit, wireless module receiving circuit, fire hydrant is carried out remote monitoring, simple in structure, be can be reliable and stable.

Description of drawings

Fig. 1 is circuit theory diagrams of the present utility model.

The specific embodiment

Further specify the utility model below in conjunction with the drawings and specific embodiments.

As shown in Figure 1, the fire hydrant wireless monitor circuit that leaks, be installed on the inner and surface of fire hydrant respectively by level sensor A, B, its output is connected to by what time base circuit U3, resistance R 2, capacitor C 1 were formed and executes close circuits for triggering, when level sensor A and B point are unsettled, the 2nd pin of time base circuit U3 is greater than 1/3VCC, the 3rd pin output low level of time base circuit U3, this moment P point journey low level state, its signal is input to the 32nd pin of single-chip microcomputer U1, after single-chip microcomputer U1 internal judgment, represent that current fire hydrant does not have drainage.When level sensor A point and B point by water body can not the insulator conducting time, the 2nd pin of time base circuit U3 is lower than 1/3VCC, the 3rd pin output high level of time base circuit U3, charge to capacitor C 3 through resistance R 3, be input to single-chip microcomputer U1 the 32nd pin again, after single-chip microcomputer U1 internal judgment, represent that the current fire hydrant that occurred has drainage, the 3rd pin output high level by single-chip microcomputer U1, make triode VT1 conducting through resistance R 4 current limlitings, be input to the 2nd pin of FDD-5 transmitter module U5, and deliver to the 3rd pin CP modulation signal input end of FDD-5 transmitter module U2, the high-frequency signal of emission is modulated.FDD-5 transmitter module U2 connects antenna to the modulated frequency electromagnetic waves of the outer emission of JDD-5 receiver module U4, the 4th pin CPA audio signal output end of JDD-5 receiver module U4 directly drives common electrical dynamic formula loudspeaker Y sounding, and the 2nd pin data output end output high level of JDD-5 receiver module U4 makes LED 1 get electroluminescence.

More than show and described basic principle of the present utility model and principal character and advantage thereof; the technical staff of the industry should understand; the utility model is not restricted to the described embodiments; that describes in the foregoing description and the explanation just illustrates principle of the present utility model; under the prerequisite that does not break away from the utility model spirit and scope; the utility model also has various changes and modifications; these changes and improvements all fall in claimed the utility model scope, and the claimed scope of the utility model is defined by appending claims and equivalent thereof.

Claims

1. the fire hydrant wireless monitor circuit that leaks, it is characterized in that: with level sensor A, it is inner and surperficial that B is installed on fire hydrant respectively, its output is connected to by time base circuit U3, resistance R 2, capacitor C 1 is formed executes close circuits for triggering, the output signal of executing close circuits for triggering is delivered to single-chip microcomputer U1, output to FDD-5 transmitter module U2 by single-chip microcomputer U1 control, FDD-5 transmitter module U2 connects antenna JDD-5 receiver module U4 is launched modulated frequency electromagnetic waves, the CPA audio signal output end control of JDD-5 receiver module U4 drives loudspeaker Y, and the control of data output end output level drives LED 1.