CN2256537Y

CN2256537Y - Micro anti-high voltage alarm

Info

Publication number: CN2256537Y
Application number: CN 96216077
Authority: CN
Inventors: 曹菁; 宋海彬
Original assignee: INSTRUMENT CENTER GEOPHYSICAL PROSPECTING CO HUABEI PETROLEUM ADMINISTRATION
Current assignee: INSTRUMENT CENTER GEOPHYSICAL PROSPECTING CO HUABEI PETROLEUM ADMINISTRATION
Priority date: 1996-08-05
Filing date: 1996-08-05
Publication date: 1997-06-18
Anticipated expiration: 2006-08-05

Abstract

The utility model relates to a mini-type anti high-voltage alarm, which is composed of a receiving antenna L, an RC resonance circuit 1, a difference amplifying unit 2, a linear amplifying unit 3, a bridge rectifying output unit 4, a range conversion unit 5, a self-detecting circuit 6, an LED driver 7, a speech module 8, a loudspeaker VL and a light-emitting element 9. The mini-type anti high-voltage alarm solves the electric-shock prevention problem when high voltage is met by drilling machines and cranes in the geological exploration, and has the characteristics of low cost, small size, high sensitivity, etc. The receiving antenna is a pull rod type, and the utility model is provided with a mini-type horn and a stacked power supply of 9V The utility model is carried in the places like power plants which have high voltage danger, when the high voltage is met, sounds and light can tell you that the high voltage danger exists before you. An alarm lamp lights to repeatedly report the distance between you and a high voltage line for you and remind you of noticing the safety.

Description

Miniature anti-high pressure alarm

The utility model belongs to fields of measurement, is specifically related to a kind of miniature anti-high pressure alarm.

The existing anti-high pressure electric shock alarm of China can only solve the protection against electric shock problem when rig is met high-tension electricity in the geologic prospecting.Its cost height, volume is big, and extremely inconvenience is installed, and need perforating fix on wagon drill.The circumscribed loudspeaker not only need external connection, and need perforating to be fixed on the wagon drill.The sucked type receiving antenna makes wagon drill when the woods walk or cross the bridge opening, very easily fractures.Especially the power supply of alarm just makes alarm except the special mu balanced circuit that prevents power filter will be arranged from the power supply storage battery of rig, the electric source filter circuit that also will have anti-automobile high-voltage electricity electric spark to disturb.This not only makes the volume of alarm increase, and has limited its usable range.For example, it is on 12 volts the rig to be used in the power supply storage battery only, is 24 volts car and can not be used to resemble the sort of power supply storage battery of crane.And the insufficient sensitivity height of alarm, this is danger close in construction.

The purpose of this utility model provides a kind of highly sensitive miniature anti-high pressure alarm.

This alarm comprises receiving antenna L, RC resonant circuit 1, difference amplifying unit 2, linear amplification unit 3, bridge rectifier output unit 4, range conversion unit 5, self-checking circuit 6, led driver 7, voice module 8, loudspeaker VL, light-emitting component 9, wherein, the antenna L that can receive hi-line zone internal electric field induced signal through RC resonant circuit 1 with have the difference amplifying unit 2 that can carry out the difference amplification and be connected, difference amplifying unit 2 is successively through linear amplifying unit 3, bridge rectifier output unit 4, range conversion unit 5 connects, the self-checking circuit 6 that can carry out acousto-optic check and the check of power supply low-voltage is connected with range conversion unit 5, range conversion unit 5 is connected with led driver, led driver one tunnel is connected with light-emitting component 9, and one the tunnel is connected with loudspeaker VL through voice module 8.

The utlity model has following advantage:

1. this alarm has not only solved the protection against electric shock problem when rig is met high-tension electricity in the geologic prospecting, and has solved the problem that the anti-high pressure of crane one class vehicle gets an electric shock that resembles.

2. this alarm cost is low, and volume is little, and is highly sensitive, and receiving antenna is a rod-pulling type, Microspeaker, and 9 volts of power supplys of lamination, usable range is extensive.Not only can be used on the various vehicles, also can carry, enter the place that power plant's one class has high pressure harm.When running into high pressure, inform that with sound, light dual mode your the place ahead has that Keep Clear-High Voltage, alarm lamp is bright, repeats to show that you apart from the distance between hi-line, remind you to take care.

3. when closing a switch K2, automatic self detecting function is arranged, report to the police automatically when supply voltage is low.

Embodiment of the present utility model respectively schemes referring to following: Fig. 1 is theory diagram Fig. 2 of the present utility model, Fig. 3 is that operating circuit schematic diagram Fig. 4 of the present utility model is among the self-checking circuit schematic diagram figure of the present utility model: the L--receiving antenna, 1--resonant circuit 2--difference amplifying unit 3--linear amplification unit 4--bridge rectifier output unit 5--range conversion unit 6--self-checking circuit 7--LED driver 8--voice module 9--light-emitting component VL--loudspeaker W--potentiometer R1～R6, R8～R16, R18～R21, R23～R30--resistance R 17, R22--variable resistor C1, C2, C4～C9, C12, C14--capacitor C 3, C10, C13--electrochemical capacitor T1, T2--field effect transistor T3～T6--triode IC1, IC2--amplifier D1～D10, D12--diode D11--voltage stabilizing diode K1, the K2--switch

Fig. 2, Fig. 3 discloses the operating circuit schematic diagram of alarm, the RC resonant element is by resistance R 1, R2, capacitor C 1, C2 forms, the difference amplifying unit is by resistance R 3～R6, R8～R10, potentiometer W, capacitor C 3～C6, field effect transistor T1, T2, triode T3, T4 forms, linear amplification unit is by resistance R 12～R16, R18～R20, variable resistor R17, capacitor C 7～C9, C12, amplifier IC1, IC2 forms, the bridge rectifier output unit is by resistance R 21, capacitor C 10, C11, C13, diode D1～D4 forms, the range conversion unit is by variable resistor R22, resistance R 23～R26, capacitor C 14, K switch 1 is formed, light-emitting component is made up of diode D5～D10, three-terminal regulator block TW provides an operating voltage for difference amplifying unit and linear amplification unit, wherein, antenna L is through capacitor C1, resistance R 1, R2 ground connection, capacitor C 2 one end ground connection, the other end is connected between resistance R 1 and the R2 and with the grid of field effect transistor T1 and is connected, the drain electrode of T1 is connected with the end of potentiometer W through resistance R 5, the other end of potentiometer W is connected through the drain electrode of resistance R 8 with field effect transistor T2, T1 is connected the back and is connected with the collector of triode T3 with the source electrode of T2, the emitter of T3 is connected back ground connection with the emitter of T4, T3 is connected with the base stage of T4 after resistance R 4, R3 is connected with the end of three-terminal regulator block TW, another termination power positive potential of TW, the 3rd end ground connection of TW, the movable end of potentiometer W is connected with three-terminal regulator block TW through resistance R 6, between resistance R 3 and R4, draw a signal through capacitor C 3 ground connection, the grid of field effect transistor T2 is through parallel resistor R11, capacitor C 6 ground connection, field effect transistor T1, two signals are drawn in the drain electrode of T2, one the tunnel through capacitor C 4, resistance R 9, R18 connects the positive pole of amplifier IC1, one the tunnel through capacitor C 5, resistance R 10, R16 connects the positive pole of amplifier IC2, resistance R 12, R13 series connection back one end connects with the end of three-terminal regulator block TW, other end ground connection, the resistance R 14 of series connection, R15 and the capacitor C 7 of connecting, after the C8 parallel connection respectively with resistance R 18, the input end of R16 connects, in resistance R 12, drawing a signal between the R13 is connected between resistance R 14 and R15 and capacitor C 7 and the C8, resistance R 19, be connected across after capacitor C 9 parallel connections between the negative input end and output terminal of amplifier IC1, and draw a signal from input end and connect with the negative input end of amplifier IC2 through variable resistor R17, resistance R 20, be connected across after capacitor C 12 parallel connections between the positive input terminal and output terminal of amplifier IC2, the output of amplifier IC1 connects with an input end of bridge rectifier through capacitor C 10, the output terminal of amplifier IC2 connects with another input end of bridge rectifier through capacitor C 13, be connected to parallel resistor R21 between two output terminals of the bridge rectifier output unit of forming by diode D1～D4, capacitor C 11, and output head grounding, another output terminal is through variable resistor R22 and capacitor C 14 in parallel, resistance R 23～R26 connects, capacitor C 14, the other end ground connection of resistance R 23, the other end of resistance R 24～R26 is that movable end is through K switch 1, terminal B is connected with the B ' terminal of led driver, led driver is drawn a signal and is connected the plus earth of light emitting diode D5～D10 with the negative electrode of the light emitting diode D5～D10 of parallel connection.

Fig. 4 discloses the self-checking circuit schematic diagram of alarm, by resistance R 27～R30, voltage stabilizing diode D11, diode D12, K switch 2, triode T5, T6 forms, wherein, the base stage of triode T5 is through K switch 2, resistance R 27 is connected with the positive potential of power supply, triode T5 collector is connected with the positive potential of power supply through resistance R 28, the emitter of triode T5 is through resistance R 30 ground connection, and between emitter and resistance R 30, draw a terminal B and " be connected with the terminal B of range conversion unit; the base stage of triode T6 is connected with the emitter of triode T5 through voltage stabilizing diode D11; the collector of triode T6 connects the positive potential of power supply through resistance R 29, and the emitter of triode T6 is through diode D12 ground connection.

Principle of work is:

Antenna L receives the sinusoidal signal of 50HZ, through the tuning coupling filtering of RC, CMOS amplifies the pipe difference, amplify than higher gain through two linear amplifier IC1, IC2, form bridge circuit by four diodes, the linear voltage signal that changes between sound is given birth to 0～3.5 volt, this voltage signal is adjusted into led driver through the range conversion network drive signal is provided, provide drive signal for voice module and for light-emitting component provides visual alarm, voice module sends the audio alert signal by loudspeaker by driver.

Self-checking circuit: when supply voltage is lower than 5 volts, will show short of electricity and warning automatically.The K2 self-checking circuit that closes a switch also can be checked sound light alarming circuit.

Claims

1. miniature anti-high pressure alarm, it is characterized in that it comprises receiving antenna L, RC resonant circuit 1, difference amplifying unit 2, linear amplification unit 3, bridge rectifier output unit 4, range conversion unit 5, self-checking circuit 6, led driver 7, voice module 8, loudspeaker VL, light-emitting component 9, wherein, the antenna L that can receive hi-line zone internal electric field induced signal through RC resonant circuit 1 with have the difference amplifying unit 2 that can carry out the difference amplification and be connected, difference amplifying unit 2 is successively through linear amplifying unit 3, bridge rectifier output unit 4, range conversion unit 5 connects, the self-checking circuit 6 that can carry out acousto-optic check and the check of power supply low-voltage is connected with range conversion unit 5, range conversion unit 5 is connected with led driver, led driver one tunnel is connected with light-emitting component 9, and one the tunnel is connected with loudspeaker VL through voice module 8.

2. miniature anti-high pressure alarm according to claim 1, it is characterized in that the RC resonant element is by resistance R 1, R2, capacitor C 1, C2 forms, the difference amplifying unit is by resistance R 3～R6, R8～R10, potentiometer W, capacitor C 3～C6, field effect transistor T1, T2, triode T3, T4 forms, linear amplification unit is by resistance R 12～R16, R18～R20, variable resistor R17, capacitor C 7～C9, C12, amplifier IC1, IC2 forms, the bridge rectifier output unit is by resistance R 21, capacitor C 10, C11, C13, diode D1～D4 forms, the range conversion unit is by variable resistor R22, resistance R 23～R26, capacitor C 14, K switch 1 is formed, light-emitting component is made up of diode D5～D10, three-terminal regulator block TW provides an operating voltage for difference amplifying unit and linear amplification unit, wherein, antenna L is through capacitor C1, resistance R 1, R2 ground connection, capacitor C 2 one end ground connection, the other end is connected between resistance R 1 and the R2 and with the grid of field effect transistor T1 and is connected, the drain electrode of T1 is connected with the end of potentiometer W through resistance R 5, the other end of potentiometer W is connected through the drain electrode of resistance R 8 with field effect transistor T2, T1 is connected the back and is connected with the collector of triode T3 with the source electrode of T2, the emitter of T3 is connected back ground connection with the emitter of T4, T3 is connected with the base stage of T4 after resistance R 4, R3 is connected with the end of three-terminal regulator block TW, another termination power positive potential of TW, the 3rd end ground connection of TW, the movable end of potentiometer W is connected with three-terminal regulator block TW through resistance R 6, between resistance R 3 and R4, draw a signal through capacitor C 3 ground connection, the grid of field effect transistor T2 is through parallel resistor R11, capacitor C 6 ground connection, field effect transistor T1, two signals are drawn in the drain electrode of T2, one the tunnel through capacitor C 4, resistance R 9, R18 connects the positive pole of amplifier IC1, one the tunnel through capacitor C 5, resistance R 10, R16 connects the positive pole of amplifier IC2, resistance R 12, R13 series connection back one end connects with the end of three-terminal regulator block TW, other end ground connection, the resistance R 14 of series connection, R15 and the capacitor C 7 of connecting, after the C8 parallel connection respectively with resistance R 18, the input end of R16 connects, in resistance R 12, drawing a signal between the R13 is connected between resistance R 14 and R15 and capacitor C 7 and the C8, resistance R 19, be connected across after capacitor C 9 parallel connections between the negative input end and output terminal of amplifier IC1, and draw a signal from input end and connect with the negative input end of amplifier IC2 through variable resistor R17, resistance R 20, be connected across after capacitor C 12 parallel connections between the positive input terminal and output terminal of amplifier IC2, the output of amplifier IC1 connects with an input end of bridge rectifier through capacitor C 10, the output terminal of amplifier IC2 connects with another input end of bridge rectifier through capacitor C 13, be connected to parallel resistor R21 between two output terminals of the bridge rectifier output unit of forming by diode D1～D4, capacitor C 11, and output head grounding, another output terminal is through variable resistor R22 and capacitor C 14 in parallel, resistance R 23～R26 connects, capacitor C 14, the other end ground connection of resistance R 23, the other end of resistance R 24～R26 is that movable end is through K switch 1, terminal B is connected with the B ' terminal of led driver, led driver is drawn a signal and is connected the plus earth of light emitting diode D5～D10 with the negative electrode of the light emitting diode D5～D10 of parallel connection.

3. miniature anti-high pressure alarm according to claim 1, it is characterized in that self-checking circuit is by resistance R 27～R30, voltage stabilizing diode D11, diode D12, K switch 2, triode T5, T6 forms, wherein, the base stage of triode T5 is through K switch 2, resistance R 27 is connected with the positive potential of power supply, triode T5 collector is connected with the positive potential of power supply through resistance R 28, the emitter of triode T5 is through resistance R 30 ground connection, and between emitter and resistance R 30, draw a terminal B and " be connected with the terminal B of range conversion unit; the base stage of triode T6 is connected with the emitter of triode T5 through voltage stabilizing diode D11; the collector of triode T6 connects the positive potential of power supply through resistance R 29, and the emitter of triode T6 is through diode D12 ground connection.