CN101206265A - Metallic pipeline sounder - Google Patents
Metallic pipeline sounder Download PDFInfo
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- CN101206265A CN101206265A CNA2007101706905A CN200710170690A CN101206265A CN 101206265 A CN101206265 A CN 101206265A CN A2007101706905 A CNA2007101706905 A CN A2007101706905A CN 200710170690 A CN200710170690 A CN 200710170690A CN 101206265 A CN101206265 A CN 101206265A
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- phase inverter
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Abstract
The invention relates to a metal pipe line detector which consists of a probe head, a high frequency oscillator, an oscillating detector, an audio frequency oscillator, a power amplifier and a loudspeaker which are connected in series, wherein, a power source respectively supplies electricity for the high frequency oscillator, the oscillating detector, the audio frequency oscillator and the power amplifier. The metal pipe line detector solves the problem that a miniature metal pipe line detector used in household decoration and repair is absent in the market; moreover, the metal pipe line detector has simple design and high cost performance.
Description
Technical field
The present invention relates to a kind of detection instrument, particularly a kind ofly be used for fitting up the micro metal pipe and cable detector that maintenance is used.
Background technology
In the house decoration maintenance, the hidden pipe concealed wire often causes certain influence to construction, even the accidents caused personnel's property loss that causes, and if can carry out certain detection before construction, and the layout of findding out the hidden pipe concealed wire can play certain help.Present contactless metal detection sensor has developed into certain level, has many kinds available.Its principle of work different sensor model number of the scope of application that has nothing in common with each other is very abundant, and range of choice is big, mainly contains (one) ultrasonic type at present, uses different materials that the different reflectivity of sound wave is surveyed metal; (2) electromagnetic induction type uses metal to absorb electromagnetic ability and surveys metal with current vortex sensor.But special-purpose metal detection instrument in the market all compares expensive, the small inexpensive metal pipeline detector that is fit to family expenses is also rare, this product is filled up this market vacancy with the metal pipeline detector of a kind of cheapness of development research, and such product will have stronger market share.
Summary of the invention
The present invention be directed to the existing market detection instrument costs an arm and a leg, be applicable to the problem that the metal pipeline detector of family lacks and propose a kind of micro metal pipe and cable detector of suitable family, realize filling up this house decoration and overhaul the market vacancy problem that middle-size and small-size detecting metal pipeline lacks, and metal detector simplicity of design of the present invention, ratio of performance to price height.
Technical scheme of the present invention is: a kind of metal pipeline detector, described metal pipeline detector is composed in series by probe, high frequency oscillator, oscillating detector, audio frequency oscillator, power amplifier, loudspeaker, and power supply is given high frequency oscillator, oscillating detector, audio frequency oscillator and power amplifier power supply respectively.Described metal pipeline detector is made of CMOS hex inverter digital integrated circuit and functional circuit.Described probe is a high value inductance.Described high frequency oscillator is made up of phase inverter 20, three electric capacity and a regulator potentiometer 24, probe and phase inverter 20 and first capacitor 21, second capacitor 22, the 3rd capacitor 23 have constituted a capacitance connecting three point type oscillator, after regulator potentiometer 24 is connected on the capacitance three-point type oscillator, be used to change the impedance of circuit.Described oscillating detector is made up of three phase inverters 31,34,35, two diodes 32,36, resistance 37, electric capacity 30, faint oscillator signal is by carrying out shaping by electric capacity 30 and phase inverter (31) in parallel mutually, the shaping circuit that resistance (37) is composed in series, obtain the higher square wave of waveform quality, carry out rectification by diode (32) again, signal after the rectification obtains the level signal of standard, the duty of removing the control audio oscillator by diode (36) at last by phase inverter (34) and phase inverter (35) shaping.
Beneficial effect of the present invention: a kind of metal pipeline detector, fill up the blank problem that lacks house decoration maintenance micro metal pipeline detection on the market, and metal detector simplicity of design of the present invention, ratio of performance to price height.
Description of drawings
Fig. 1 is a metal pipeline detector circuit block diagram of the present invention;
Fig. 2 is metal pipeline detector circuit theory diagrams of the present invention.
Embodiment
The present invention is described in further detail below in conjunction with accompanying drawing and specific implementation method:
As Fig. 1 metal pipeline detector circuit block diagram of the present invention as can be seen, this metal detection instrument is composed in series by probe 1, high frequency oscillator 2, oscillating detector 3, audio frequency oscillator 4, power amplifier 5, loudspeaker 6, and power supply 7 is given high frequency oscillator 2, oscillating detector 3, audio frequency oscillator 4 and power amplifier 5 power supplies.And the circuit of these several parts all is made of CMOS hex inverter digital integrated circuit CD4069 and other functional circuit, and physical circuit as shown in Figure 2.
As Fig. 2 metal pipeline detector circuit theory diagrams of the present invention, CD4069 is a CMOS hex inverter digital integrated circuit (other phase inverters all can as 74LS04 etc.), total U2A, U2B, U2C, U2D, six phase inverters of U2E, U2F.
As the high frequency oscillator among Fig. 22, the probe 1 of metal detector is the inductance L 1 (4-50mH) of a high Q value.It and phase inverter 20 (U2A) and first capacitor 21 (c1:1500-10000pF), second capacitor 22 (c2:1500-10000pF), the 3rd capacitor 23 (c3:1500-10000pF) have constituted a capacitance connecting three point type oscillator.Its oscillation frequency is about 27kHz (can obtain different frequencies when L1, c1, c2, c3 get different values, be good with the scope of 20-30kHz).Regulator potentiometer 24 (R2 Wound-rotor type variable resistor) can change the impedance of circuit, makes circuit be in the state of starting of oscillation just.
First as oscillator signal faint in Fig. 2 oscillating detector 3 by the flip-flop in electric capacity 30 (C4) the elimination signal, the waveform shaping circuit of being made up of phase inverter 31 (U2B) and the 3rd resistance 37 (R3) carries out shaping again, again by diode 32 (commutation diode such as D1:1n4148) rectification, signal after the rectification is converted to the high-low level signal of standard by phase inverter 34 (U2C) and 35 (U2D), by the duty of removing the audio frequency oscillator 4 that control is made of phase inverter 40 (U2E) and 41 (U2F) after the alternating component in electric capacity 38 (C5) the elimination signal by diode 36 commutation diodes such as () D2:1n4148, audio frequency oscillator 4 outputs signal to triode 51 in the power amplifier 5 and drives loudspeakers 6 and work.
The principle of work of high frequency oscillator detection metal is to regulate the gain potentiometer of high frequency oscillator, makes oscillator be in the threshold oscillation state just, that is to say just to make the oscillator starting of oscillation.When detecting coil when the metal object, because electromagnetic induction phenomenon can produce vortex flow in metallic conductor, energy loss in the oscillation circuit is increased, positive feedback weakens, and the oscillator vibration that is in critical state weakens, even can't keep the required minimum energy of vibration and failure of oscillation.Whether if can detect this variation, and convert voice signal to, have or not according to sound, just can judge has had metal object below the detecting coil.
In this product, as probe 1 inductance L 1 not near metal object the time.The normal starting of oscillation of circuit.Oscillator signal control audio oscillator quits work, and loudspeaker is sounding not.During near inductance (axial direction of telefault), the Q value of inductance L 1 descends as metal object.The circuit failure of oscillation does not have the signal audio frequency oscillator that disinthibites.So audio frequency oscillator work drives the loudspeaker sounding.During use, power supply inserts connection terminal 71, by switch 70 (S1) with after power supply 7 is connected.The careful potentiometer R2 that adjusts does not just ring loudspeaker.At this moment sensitivity is higher, and detection range can reach 20mm-50mm (parameter of actual detection distance and selected original paper is relevant with the physical size of inductance 1 (L1)).
Can adorn box after circuit is carried out, but be noted that necessarily the probe inductance will be away from metal object, so can not do shell with metal.The key element of entire circuit is a probe inductance 1 (L1), it must be the vertical inductor of I shape magnetic core, inductance value is 6.7mH (optional 4-50mH, the L1 inductance value is big more, the sectional area of coil is big more, then detection range is big more, also want the value of corresponding raising electric capacity 21,22,23 and resistance 24 not so to be difficult for when getting big inductance value or can not starting of oscillation), self resistance of inductance is the smaller the better.
Now introduce its using method, do standard earlier, regulate variable resistor 24 when near probe 1, having metal object, make loudspeaker just in time noiseless.Finished and transferred work, just can use afterwards, when the hummer sounding, under the explanation probe metal object has been arranged.
This metal detector also can repack a metal alarm into.Only need phase inverter 35 (U2D) is disconnected, the output of phase inverter 34 (U2C) and diode 36 (D2) are directly connected together, make output signal anti-phase.During use probe is placed on the expensive instrument bottom that has metal chassis that needs supervision.When the people took expensive instrument away, loudspeaker promptly sent chimes of doom.The sensor of this metal detector is output as digital quantity and can links to each other with other circuit or controller easily in addition, thereby its function is expanded.
Use six groups of phase inverters of CMOS hex inverter digital integrated circuit CD4069 in this example.L1 gets 6.7mH (vertical magnetic core inductance), c1, c2, c3 and gets 4700pF (adopting leaded multilayer ceramic capacitor in this example), and C4, C5 are 0.01uF, and C6 is 1000pF, R1 is metal film 1/4W resistance 230K (later on if do not illustrate that then resistance all is the 1/4W metalfilmresistor), R2 is a 10K Wound-rotor type adjustable resistance, and R3 is 680K, and R4 is 51K, R5 is 200K, R6 is 1.5K, and diode D1, D2 are 1N4148, and triode Q1 is a NPN pipe 9014, loudspeaker U1 is the 5V hummer, and power supply is the DC5V input.
After the energized.The careful potentiometer R2 that adjusts does not just ring loudspeaker.At this moment sensitivity is higher, draws detection range through experiment and can reach 30mm.In this distance, may detect metal cuboid greater than 2mm*2mm*2mm.
Claims (5)
1. metal pipeline detector, it is characterized in that described metal pipeline detector is composed in series by probe, high frequency oscillator, oscillating detector, audio frequency oscillator, power amplifier, loudspeaker, power supply is given high frequency oscillator, oscillating detector, audio frequency oscillator and power amplifier power supply respectively.
2. according to the described metal pipeline detector of claim 1, it is characterized in that described metal pipeline detector is made of CMOS hex inverter digital integrated circuit and functional circuit.
3. according to the described metal pipeline detector of claim 1, its feature with described probe be a high value inductance.
4. according to the described metal pipeline detector of claim 1, it is characterized in that described high frequency oscillator is made up of phase inverter (20), three electric capacity and a regulator potentiometer (24), probe and phase inverter (20) and first capacitor (21), second capacitor (22), the 3rd capacitor (23) have constituted a capacitance connecting three point type oscillator, after regulator potentiometer (24) is connected on the capacitance three-point type oscillator, be used to change the impedance of circuit.
5. according to the described metal pipeline detector of claim 1, it is characterized in that described oscillating detector is by three phase inverters (31,34,35), two diodes (32,36), resistance (37), electric capacity (30) is formed, faint oscillator signal is by the phase inverter (31) by electric capacity (30) and mutual parallel connection, the shaping circuit that resistance (37) is composed in series carries out shaping, obtain the higher square wave of waveform quality, carry out rectification by diode (32) again, signal after the rectification obtains the level signal of standard, the duty of removing the control audio oscillator by diode (36) at last by phase inverter (34) and phase inverter (35) shaping.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2007101706905A CN101206265A (en) | 2007-11-21 | 2007-11-21 | Metallic pipeline sounder |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2007101706905A CN101206265A (en) | 2007-11-21 | 2007-11-21 | Metallic pipeline sounder |
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| CN101206265A true CN101206265A (en) | 2008-06-25 |
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| Application Number | Title | Priority Date | Filing Date |
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| CNA2007101706905A Pending CN101206265A (en) | 2007-11-21 | 2007-11-21 | Metallic pipeline sounder |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102253424A (en) * | 2011-04-22 | 2011-11-23 | 昆山市因特电子有限公司 | Metal piece detector |
| CN106950604A (en) * | 2015-12-17 | 2017-07-14 | 梅特勒-托利多安全线有限公司 | Metal detection device, test device and the method for optimizing metal detection device |
| CN107329178A (en) * | 2017-08-10 | 2017-11-07 | 无锡市日升机械厂 | The alpin-stock of built-in metal detector |
| CN109395335A (en) * | 2019-01-02 | 2019-03-01 | 上海融体信息科技有限公司 | A kind of shared basketball can recognize anti-exchange |
| CN111768578A (en) * | 2020-07-02 | 2020-10-13 | 常州倍速智能科技有限公司 | Low-voltage acousto-optic integrated warning device |
| CN112285789A (en) * | 2020-10-30 | 2021-01-29 | 中国电波传播研究所（中国电子科技集团公司第二十二研究所） | Array type electromagnetic induction probe based on differential receiving and detection method thereof |
-
2007
- 2007-11-21 CN CNA2007101706905A patent/CN101206265A/en active Pending
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102253424A (en) * | 2011-04-22 | 2011-11-23 | 昆山市因特电子有限公司 | Metal piece detector |
| CN106950604A (en) * | 2015-12-17 | 2017-07-14 | 梅特勒-托利多安全线有限公司 | Metal detection device, test device and the method for optimizing metal detection device |
| CN106950604B (en) * | 2015-12-17 | 2020-08-18 | 梅特勒-托利多安全线有限公司 | Metal detection device, testing apparatus and method for optimizing a metal detection device |
| CN107329178A (en) * | 2017-08-10 | 2017-11-07 | 无锡市日升机械厂 | The alpin-stock of built-in metal detector |
| CN109395335A (en) * | 2019-01-02 | 2019-03-01 | 上海融体信息科技有限公司 | A kind of shared basketball can recognize anti-exchange |
| CN111768578A (en) * | 2020-07-02 | 2020-10-13 | 常州倍速智能科技有限公司 | Low-voltage acousto-optic integrated warning device |
| CN112285789A (en) * | 2020-10-30 | 2021-01-29 | 中国电波传播研究所（中国电子科技集团公司第二十二研究所） | Array type electromagnetic induction probe based on differential receiving and detection method thereof |
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Open date: 20080625 |