CN2802520Y - Electromagnet wave range-measurement alarm circuit - Google Patents

Electromagnet wave range-measurement alarm circuit Download PDF

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Publication number
CN2802520Y
CN2802520Y CN 200520110032 CN200520110032U CN2802520Y CN 2802520 Y CN2802520 Y CN 2802520Y CN 200520110032 CN200520110032 CN 200520110032 CN 200520110032 U CN200520110032 U CN 200520110032U CN 2802520 Y CN2802520 Y CN 2802520Y
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CN
China
Prior art keywords
circuit
pin
capacitor
ground connection
connects
Prior art date
Application number
CN 200520110032
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Chinese (zh)
Inventor
余国权
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余国权
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Application filed by 余国权 filed Critical 余国权
Priority to CN 200520110032 priority Critical patent/CN2802520Y/en
Application granted granted Critical
Publication of CN2802520Y publication Critical patent/CN2802520Y/en

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Abstract

The utility model discloses an electromagnet wave range-measurement alarm circuit, which comprises a voltage stabilizing circuit, an electromagnetic wave generating circuit, a power amplification and electromagnetic wave transmitting circuit, an electromagnetic wave transmitting antenna, an electromagnetic wave receiving antenna, a signal reception processing circuit, an analogue-digital conversion circuit, an operation unit of a microprocessor and a distance prompting unit of a buzzer, wherein the output end of the electromagnetic wave generating circuit is connected with the input end of the power amplification and electromagnetic wave transmitting circuit; the output end of the power amplification and electromagnetic wave transmitting circuit is connected with the electromagnetic wave transmitting antenna; the electromagnetic wave receiving antenna is connected with the input end of the signal reception processing circuit; the output end of the signal reception processing circuit is connected with the input end of the analogue-digital conversion circuit; the output end of the analogue-digital conversion circuit is connected with the input end of the operation unit of the microprocessor; one output end of the operation unit of the microprocessor is connected with the control end of the distance prompting unit of the buzzer.

Description

The electromagnetic distance measurement warning circuit
Technical field
The utility model belongs to the range finding warning circuit, and is particularly a kind of with the range finding warning circuit of electromagnetic wave as detectable signal.
Background technology
Range finding warning circuit of the prior art generally adopts ultrasonic signal as detectable signal, designs according to the sonar ranging principle.This type of range-measuring circuit range accuracy height can show or cursor shows or voice reflect actual range with signal source and barrier with Exact Number.But this type of range-measuring circuit is because the existence of ultrasonic sensor remained shock, the dead band that total existence is about 0.3 meter can not accurately be surveyed, and, ultrasonic sensor needs according to this circuit protect the installation of car bit hole at the tailstock, like this, not only destroyed the overall appearance of automobile, made the tailstock protect the firm performance of thick stick again and descend.
The utility model content
The utility model is intended to overcome weak point of the prior art, and a kind of electromagnetic distance measurement circuit of surveying the dead band and need not to protect at the tailstock boring installation on the thick stick that do not have is provided.
To achieve these goals, electromagnetic distance measurement warning circuit of the present utility model comprises mu balanced circuit, the electromagnetism wave generation circuit, power amplification and electromagnetic wave radiating circuit, electromagnetic wave emitting antenna, electromagnetic wave receiving antenna, the signal receiving processing circuit, analog to digital conversion circuit, microprocessor arithmetic element, hummer distance prompt unit; Wherein, the output terminal of described electromagnetism wave generation circuit is connected into the input end of power amplification and electromagnetic wave radiating circuit, the output terminal of power amplification and electromagnetic wave radiating circuit connects the electromagnetic wave emitting antenna, the electromagnetic wave receiving antenna connects the input end of signal receiving processing circuit, the output terminal of signal receiving processing circuit connects the input end of analog to digital conversion circuit, the output terminal of analog to digital conversion circuit connects the input end of microprocessor arithmetic element, and an output terminal of microprocessor arithmetic element connects the control end of hummer distance prompt unit.
The utility model has overcome the major defect of ultrasonic ranging circuit, no dead band.Though accurately the detecting obstacles object distance from, can point out general distance with sound or cursor; Use antenna to make sensor, only sensor need be attached to the tailstock and protect thick stick inside or outside getting final product.Do not influence the beautiful and original security of outward appearance of automobile.
Description of drawings
Fig. 1 is the schematic block circuit diagram of the utility model first embodiment.
Fig. 2 is the circuit diagram of the utility model first embodiment.
Embodiment
With reference to Fig. 1, electromagnetic distance measurement warning circuit in the present embodiment comprises mu balanced circuit 1, microprocessor computing circuit 2, hummer distance prompt unit 3, vibration, electromagnetic wave generation, power amplification and radiating circuit 4, signal receiving circuit 5, signal processing circuit 6 and analog to digital conversion circuit 7, described hummer distance prompt unit 3 comprises hummer 301 and hummer amplifying circuit 302 and antenna 8, wherein, antenna 8 both as emitting antenna also as receiving antenna.
With reference to Fig. 2, mu balanced circuit 1 is by rectifier cell U1, polar capacitor C1, C3, and nonpolar capacitor C2, C4, inductor L1, diode D1 and connector J1 form; Connector J1 contact 2 ground connection, electric shock 1 is connected to the 12V positive level of Vehicular accumulator cell on the anode of diode D1, the negative electrode of diode connects the end of inductor L1, and the other end of L1 connects the input pin 3 of U1, C1, C2 parallel connection, back in parallel positive terminal connects the input pin 3 of rectifier cell U1, negative pole end ground connection, the 2 pin ground connection of rectifier cell U1, C3, C4 parallel connection, back in parallel positive terminal connects rectifier cell U1 output pin 1, negative pole end ground connection; This mu balanced circuit output from diode D1 negative electrode+12V output terminal and output from U2 output pin 1+the 5V output terminal; Wherein, connector J1 connects two electrodes of Vehicular accumulator cell.
Microprocessor computing circuit 2 is by microcontroller U2, resistor R 1, R2, R3, and polar capacitor C5, nonpolar capacitor C6, C7, crystal oscillator Y1 forms; The positive terminal of capacitor C5 connect the 20th pin of microcontroller U2 and connect mu balanced circuit+the 5V output terminal, pass through R1 ground connection behind the 1st pin of negative pole end connection U2,2nd, 3 pin are connected into hummer power amplifier 3 by resistance R 2, R3 respectively, the 4th, 5 pin of U2 connect crystal oscillator Y1, the two ends of crystal oscillator Y1 are respectively by capacitor C6, C7 ground connection, the 6th, 7 pin of U2 connect analog to digital conversion circuit 7, the 10th pin ground connection of U2, and other pin are empty pin.
Hummer power amplifier 302 is by NPN type triode Q1, Q2, resistor R 4, R5, R6, R7, and inductor L2 and connector J2 form; The base stage of Q1, Q2 inserts the 3rd, 4 pin of microprocessor computing circuit 2 respectively by resistor R 2, R3, and respectively by resistor R 5, R7 connection+12V power end; Grounded emitter; By R4, R6 connection+12V power end, wherein, the collector of Q1 also links to each other with 2 terminals of connector J2 collector respectively, and Q2 also links to each other with 1 terminal of connector J2 by inductor L2; Hummer 301 (not shown)s are by connector J2 hummer power amplifier 3 electrical connections therewith, in order to the signal of ringing to be provided.
Vibration, electromagnetic wave generation, power amplification and radiating circuit 4 be by NPN type triode Q3, resistor R 8, R9, and capacitor C8, C9, C10, C11, C12, C13, inductor L3, L4, diode D2 and connector J3 form; Wherein, collector connection+5V the output terminal of triode Q3, and by resistance R 8 connection base stages, by capacitor C8 ground connection, base stage is connected into 2 terminals of connector J3 by series capacitors C11 and C12, the collector of triode Q2 is divided into two-way behind capacitor C9 by parallel connection and the inductor L4 again by R9, the capacitor C12 of leading up to links to each other with 2 terminals of connector J3, another road is by capacitor C10 ground connection, the end of inductor L3 and linking to each other of R9, other end ground connection, 1 terminal of connector J3 is by capacitor C13, diode D2 ground connection; Connector J3 links to each other with exterior antenna, by exterior antenna emission and reception electromagnetic wave signal.
Signal receiving circuit 5 is by diode D3, resistor R 10, R11, and capacitor C14, C15, C16, C17 form; The end of capacitor C13 in the negative electrode of diode D3 and vibration, electromagnetic wave generation, power amplification and the radiating circuit 4 links to each other, its anode connects and is divided into three the tunnel, lead up to series capacitors C16 and C17 ground connection, the second the tunnel by capacitor C15 ground connection, Third Road is by after the resistance R 11, lead up to capacitor C14, another road is by resistor R 10 connection+5V power ends.
Signal processing circuit 6 is by amplifier U4A, U4B, resistor R 12, R13, R14, R15, R16, R17, R18, R19, and capacitor C18, C19, C20, C21, C22 and potentiometer W1 form; Amplifier U4A inverting input connects between the C16 and C17 of signal receiving circuit 5, its in-phase input end is by R14 ground connection, and by R13 connection+5V power end, its output terminal and end of oppisite phase point are gone back resistors in parallel R12 and capacitor C18, its output terminal also connects the inverting input of amplifier U4B by resistor R 15, the in-phase input end of amplifier U4B connects+the 5V power end by resistor R 18, by capacitor C22 ground connection, and potentiometer W1 and resistor R 19 ground connection by connecting, be parallel with resistor R 16 and capacitor C19 between the inverting input of amplifier U4B and the output terminal, its inverting input is by capacitor C20 ground connection, and output terminal is by the resistor R 17 and the capacitor C21 ground connection of series connection.
Analog to digital conversion circuit 7 is made up of A/D converter spare U3 independently, there are not other adjunct circuits, wherein, the 1st pin of U3 connects the 10th pin of microcontroller U2 in the microprocessor computing circuit 2, and the 2nd pin is empty pin, and the 3rd pin connects the output terminal of amplifier U4B, the 4th pin ground connection, 5th, 6 pin connect the 6th pin of microcontroller U2, and the 7th pin connects the 7th pin of microcontroller U2, the 8th pin connection+5V power end.
The principle of work of the range finding warning circuit in the present embodiment is as follows: mu balanced circuit 1 mainly provides stable operating voltage.Vibration produces the electromagnetic wave about 360KHz, carries out power amplification through the power amplifier radiating circuit and is transmitted into surrounding space by antenna.Signal receiving circuit 5 can detect the intensity (both distances of barrier) of variation in barrier enters magnetic field range, and the corresponding voltage signal of output is sent into analog to digital conversion circuit 7 after signal processing circuit 6 is handled.Analog to digital conversion circuit 7 is converted to corresponding digital signal with voltage signal and sends into microprocessor computing circuit 2.Thereby microprocessor computing circuit 2 drives hummer according to informing the driver apart from sending different prompt tones with the actual range control hummer power amplifier 3 that the digital signal of receiving calculates barrier.

Claims (8)

1. electromagnetic distance measurement warning circuit, it is characterized in that: comprise mu balanced circuit, the electromagnetism wave generation circuit, power amplification and electromagnetic wave radiating circuit, electromagnetic wave emitting antenna, electromagnetic wave receiving antenna, the signal receiving processing circuit, analog to digital conversion circuit, microprocessor arithmetic element, hummer distance prompt unit; Wherein, the output terminal of described electromagnetism wave generation circuit is connected into the input end of power amplification and electromagnetic wave radiating circuit, the output terminal of power amplification and electromagnetic wave radiating circuit connects the electromagnetic wave emitting antenna, the electromagnetic wave receiving antenna connects the input end of signal receiving processing circuit, the output terminal of signal receiving processing circuit connects the input end of analog to digital conversion circuit, the output terminal of analog to digital conversion circuit connects the input end of microprocessor computing circuit, and an output terminal of microprocessor computing circuit connects the control end of hummer distance prompt unit.
2. electromagnetic distance measurement warning circuit according to claim 1, it is characterized in that: described mu balanced circuit comprises rectifier cell (U1), polar capacitor (C1), (C3), nonpolar capacitor (C2), (C4), inductor (L1), diode (D1) and connector (J1), connector (J1) contact (2) ground connection, contact (1) is connected to the 12V positive level of Vehicular accumulator cell on the anode of diode (D1), the negative electrode of diode connects an end of inductor (L1), and the other end (L1) connects the input pin (3) of (U1), (C1), (C2) parallel connection, back in parallel positive terminal connects the input pin (3) of rectifier cell (U1), negative pole end ground connection, (2) pin ground connection of rectifier cell (U1), (C3), (C4) parallel connection, back in parallel positive terminal connects rectifier cell (U1) output pin (1), negative pole end ground connection; Described mu balanced circuit comprises diode D1 negative electrode+12V output terminal and U2 output pin 1+5V output terminal.
3. electromagnetic distance measurement warning circuit according to claim 2, it is characterized in that: the microprocessor computing circuit comprises microcontroller (U2), resistor (R1), (R2), (R3), polar capacitor (C5), nonpolar capacitor (C6), (C7), crystal oscillator (Y1) is formed; The positive terminal of capacitor (C5) connect (20) pin of microcontroller (U2) and connect mu balanced circuit+the 5V output terminal, pass through (R1) ground connection behind (1) pin of negative pole end connection (U2), (2), (3) pin is connected into the hummer power amplifier by resistance (R2), (R3) respectively, (U2) (4), (5) pin connects crystal oscillator (Y1), the two ends of crystal oscillator (Y1) are respectively by capacitor (C6), (C7) ground connection, (U2) (6), (7) pin connection mode number converter, (U2) (10) pin ground connection, other pin are empty pin.
4. electromagnetic distance measurement warning circuit according to claim 2, it is characterized in that: described distance prompt circuit comprises hummer and hummer power amplifier, the hummer power amplifier is by NPN type triode (Q1), (Q2), resistor (R4), (R5), (R6), (R7), inductor (L2) and connector (J2) are formed; (Q1), the base stage of (Q2) respectively by resistor (R2), (R3) insert the microprocessor computing circuit (3), (4) pin, and respectively by resistor (R5), (R7) connection+12V power end; Grounded emitter; By resistance (R4), (R6) connection+12V power end, wherein, collector (Q1) also links to each other with (2) terminal of connector (J2) collector respectively, (Q2) also links to each other with (1) terminal of connector (J2) by inductor (L2).
5. electromagnetic distance measurement warning circuit according to claim 2, it is characterized in that: electromagnetic wave generation, power amplification and radiating circuit are by NPN type triode (Q3), resistor (R8), (R9), capacitor (C8), (C9), (C10), (C11), (C12), (C13), inductor (L3), (L4), triode (D2) and connector (J3) are formed; Wherein, collector connection+5V the power end of triode (Q3), and by resistance (R8) connection base stage, by capacitor (C8) ground connection, base stage is by series capacitors (C11) and (C12) be connected into (2) terminal of connector (J3), the collector of triode (Q2) by (R9) again by being divided into two-way behind capacitor (C9) in parallel and the inductor (L4), the capacitor (C12) of leading up to links to each other with (2) terminal of connector (J3), another road is by capacitor (C10) ground connection, one end of inductor (L3) links to each other with (R9's), other end ground connection, (1) terminal of connector (J3) is by capacitor (C13), diode (D2) ground connection; Connector (J3) links to each other with antenna, outwards launches and the reception electromagnetic wave signal by antenna.
6. electromagnetic distance measurement warning circuit according to claim 2, it is characterized in that: described signal receiving processing circuit comprises signal receive section and signal processing circuit, wherein, signal receive section is by diode (D3), resistor (R10), (R11), capacitor (C14), (C15), (C16), (C17) form; One end of the capacitor (C13) in the negative electrode of diode (D3) and vibration, electromagnetic wave generation, power amplification and the radiating circuit links to each other, its anode connects and is divided into three the tunnel, lead up to series capacitors (C16), (C17) ground connection, the second the tunnel by capacitor (C15) ground connection, Third Road is by behind the resistance (R11), lead up to capacitor (C14), another road is by resistor (R10) connection+5V power end; Signal processing circuit is by amplifier (U4A), (U4B), resistor (R12), (R13), (R14), (R15), (R16), (R17), (R18), (R19), capacitor (C18), (C19), (C20), (C21), (C22) and potentiometer (W1) are formed; The inverting input of amplifier (U4A) connect (C16) of signal receiving circuit and (C17) between, its in-phase input end is by (R14) ground connection, and by (R13) connection+5V power end, go back resistors in parallel (R12) and capacitor (C18) between its output terminal and the end of oppisite phase, its output terminal also connects the inverting input of amplifier (U4B) by resistor (R15), the in-phase input end of amplifier (U4B) connects+the 5V power end by resistor (R18), by capacitor (C22) ground connection, and potentiometer (W1) and resistor (R19) ground connection by connecting, be parallel with resistor (R16) and capacitor (C19) between the inverting input of amplifier (U4B) and the output terminal, its inverting input is by capacitor (C20) ground connection, and output terminal is by the resistor (R17) and capacitor (C21) ground connection of series connection.
7. electromagnetic distance measurement warning circuit according to claim 2, it is characterized in that: analog to digital conversion circuit is made up of A/D converter spare (U3) independently, there are not other adjunct circuits, wherein, (U3) (1) pin connects (10) pin of microcontroller (U2) in the microprocessor arithmetic element, (2) pin is empty pin, (3) pin connects the output terminal of amplifier (U4B), (4) pin ground connection, (5), (6) pin connects (6) pin of microcontroller (U2), (7) pin connects (7) pin of microcontroller (U2), (8) pin connection+5V power end.
8. the warning circuit that it is characterized in that according to claim 1 is characterized in that: described electromagnetic wave emitting antenna and electromagnetic wave receiving antenna are the same antenna.
CN 200520110032 2005-06-14 2005-06-14 Electromagnet wave range-measurement alarm circuit CN2802520Y (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN 200520110032 CN2802520Y (en) 2005-06-14 2005-06-14 Electromagnet wave range-measurement alarm circuit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN 200520110032 CN2802520Y (en) 2005-06-14 2005-06-14 Electromagnet wave range-measurement alarm circuit

Publications (1)

Publication Number Publication Date
CN2802520Y true CN2802520Y (en) 2006-08-02

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Application Number Title Priority Date Filing Date
CN 200520110032 CN2802520Y (en) 2005-06-14 2005-06-14 Electromagnet wave range-measurement alarm circuit

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102854815A (en) * 2012-07-25 2013-01-02 北京百纳威尔科技有限公司 Mobile terminal

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102854815A (en) * 2012-07-25 2013-01-02 北京百纳威尔科技有限公司 Mobile terminal
CN102854815B (en) * 2012-07-25 2015-02-04 北京百纳威尔科技有限公司 Mobile terminal

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