CN106226827A - A kind of metal probing method based on mu balanced circuit Application Design - Google Patents
A kind of metal probing method based on mu balanced circuit Application Design Download PDFInfo
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- CN106226827A CN106226827A CN201610556511.0A CN201610556511A CN106226827A CN 106226827 A CN106226827 A CN 106226827A CN 201610556511 A CN201610556511 A CN 201610556511A CN 106226827 A CN106226827 A CN 106226827A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01V—GEOPHYSICS; GRAVITATIONAL MEASUREMENTS; DETECTING MASSES OR OBJECTS; TAGS
- G01V3/00—Electric or magnetic prospecting or detecting; Measuring magnetic field characteristics of the earth, e.g. declination, deviation
- G01V3/12—Electric or magnetic prospecting or detecting; Measuring magnetic field characteristics of the earth, e.g. declination, deviation operating with electromagnetic waves
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01V—GEOPHYSICS; GRAVITATIONAL MEASUREMENTS; DETECTING MASSES OR OBJECTS; TAGS
- G01V3/00—Electric or magnetic prospecting or detecting; Measuring magnetic field characteristics of the earth, e.g. declination, deviation
- G01V3/08—Electric or magnetic prospecting or detecting; Measuring magnetic field characteristics of the earth, e.g. declination, deviation operating with magnetic or electric fields produced or modified by objects or geological structures or by detecting devices
- G01V3/10—Electric or magnetic prospecting or detecting; Measuring magnetic field characteristics of the earth, e.g. declination, deviation operating with magnetic or electric fields produced or modified by objects or geological structures or by detecting devices using induction coils
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Abstract
The present invention discloses a kind of metal probing method based on mu balanced circuit Application Design, the metal detecting system utilizing voltage-stabilizing power supply system and detection system to be formed carries out the detection of metal, probing wave signal is formed including: emitter, and by probing wave signal is launched for carrying out the coil of signal transmitting in transmission coil system；Probing wave signal, when contacting with metal object, produces magnetic field near metal object due to eddy current effect；When, after probing wave signal ended, eddy current continues to flow in the coil for carrying out signal transmitting, under the effect of magnetoelectric effect, will produce induced voltage in transmission coil system in the coil carrying out signal reception；Induced voltage is transported to utilize audio system to send prompt tone after rectification, amplification etc. process in receptor by the coil for carrying out signal reception；Can be powered based on voltage-stabilizing power supply system, metal object is detected by the technology changed by magnetoelectricity, and whole method step is simple, easy to use.
Description
Technical field
The present invention relates to electromagnetic wave detection technical field, specifically, be a kind of gold based on mu balanced circuit Application Design
Belong to detection method.
Background technology
Metal is that one has gloss (i.e. to visible ray strong reflection), is rich in the character such as ductility, easily conduction, heat conduction
Material.All with metallic crystal, to be contained within free electron relevant for the above-mentioned speciality of metal.In nature, most metals with
Compound state exists, and a few metals such as gold, platinum, silver, bismuth exist with free state.Metalliferous mineral majority is oxide and sulfide.
Other existence forms have chloride, sulfate, carbonate and silicate.Link between metal is metallic bond, therefore the most more
Change place all can re-establish link again, and this is also the reason that metal ductility is good.Metallic element in compound generally only
Aobvious nominal price.What relative atomic mass was bigger is referred to as heavy metal.
Depart from owing to the electronics of metal is inclined to, therefore there is good electric conductivity, and metallic element is usual in compound
Band nominal price electricity, but when temperature is the highest, hinder because receiving nuclear heat shock, resistance will become big.Metallic molecule it
Between link be metallic bond, the most arbitrarily change position and all can re-establish link again, this is also good former of metal extensibility
Cause.
In nature, most metals exist with compound state, and a few metals such as gold, silver, platinum, bismuth are deposited with free state
?.Metalliferous mineral majority is oxide and sulfide, and other existence forms have chloride, sulfate, carbonate and silicate.
The material belonging to metal has gold, silver, copper, ferrum, manganese, zinc etc..Under the room temperature of an atmospheric pressure and 25 degrees Celsius, the removal of mercury
(liquid) outward, other metals are all solids.Most simple metal is silvery white (grey) color, and only minority is not, if gold is yellow red
Color, copper is aubergine.Metal carries " Jin " other mostly.
It is generally metal by the Material Definitions with positive temperature resistance coefficient.The week of the element containing 112 kinds of elements used
In phase table, metallic element totally 90 kinds.Be positioned at the lower left of " boron-astatine demarcation line ", in s district, p district, d district, 5 regions such as f district all
Metallic element, transition elements is had to be entirely metallic element.
In solid metallic conductor, there is a lot of movably free electron.Although these electronics do not fetter any spy of what
Determine atom, but all fetter in the lattice of what metal；Even under not having External Electrical Field, because heat energy, these electronics are still
Can move randomly.But, in conductor, mean net electric current is zero.Select the internal arbitrary section of wire, be spaced at any time
In, move on to the number of electrons of another side from cross section, move past the number in cross section equal to opposite direction.
Metal detection, it rationale here is that, magnetic property based on material, and metal object can cause in certain magnetic field
The change of one self-induction of loop, also can cause degree of coupling Dian between coil to change, if a conductor is placed in the magnetic field of change
In, conductor will sense and produce eddy current, and the size of eddy current depends on the resistance of the shape of metal object, size and component
Rate.
Summary of the invention
It is an object of the invention to provide a kind of metal probing method based on mu balanced circuit Application Design, it is possible to based on surely
Pressure electric power system is powered, and metal object is detected by the technology changed by magnetoelectricity, uses small and exquisite design to complete
Metal detecting, whole method step is simple, easy to use, the metal detecting in suitable multiple place.
The present invention is achieved through the following technical solutions: a kind of metal probing method based on mu balanced circuit Application Design, profit
The metal detecting system formed by voltage-stabilizing power supply system and detection system carries out the detection of metal, including step in detail below:
1) emitter forms probing wave signal, and by the coil for carrying out signal transmitting in transmission coil system by detection
Ripple signal is launched；
2) probing wave signal is when contacting with metal object, produces magnetic field near metal object due to eddy current effect；
3) when, after probing wave signal ended, eddy current continues to flow, in magnetoelectric effect in the coil for carrying out signal transmitting
Under effect, in transmission coil system, induced voltage will be produced in the coil carrying out signal reception；
4) induced voltage is transported in receptor by the coil being used for carrying out signal reception；
5) induced voltage is carried out utilizing audio system to send prompt tone after rectification, amplification etc. process by receptor (5).
The most to better implement the present invention, following set-up mode is used especially: also include providing work for emitter
Make the step of voltage:
A.1) voltage after filtering output is by the reference voltage electricity by being mainly made up of resistance R1 and controllable accurate source of stable pressure D1
Road provides voltage reference；
A.2) sample circuit being mainly made up of resistance R2, resistance R3, potentiometer W1 is sampled from output filtering end, is taken
Sample voltage；
A.3) sampling voltage utilizes the comparison being mainly made up of audion Q1, audion Q2, integrated transporting discharging U1, electric capacity C1 to amplify
Circuit combines the voltage reference that reference voltage circuit provides, and carries out voltage ratio relatively；
A.4) when sampling voltage is compared with reference voltage, sampling voltage is too high, then adaptive by comparing amplifying circuit
Regulation makes the voltage from comparing amplifying circuit output reduce, and vice versa；
A.5) output filter circuit being mainly made up of electric capacity C2 will be utilized to carry out ripple from the voltage comparing amplifying circuit output
Filter；
A.6) regulated power supply after ripple filters is supplied emitter emitter is worked and is in steady-working state.
The most to better implement the present invention, following set-up mode is used especially: described metal detecting system is arranged
There are interconnective voltage-stabilizing power supply system and detection system, are provided with transmission coil system, emitter in described detection system, determine
Time circuit, receptor and audio system, described transmission coil system is connected with voltage-stabilizing power supply system, emitter and receptor respectively
Connecing, described emitter connects timing circuit, and described transmission coil system includes two transmitting coils, and the one of two transmitting coils
End is connected with emitter and receptor respectively, the other end ground connection of two transmitting coils, the circle diameter of described transmitting coil
For 180mm, and transmitting coil uses No. 28 copper cash, and the number of turn of transmitting coil is 20 ~ 24 circles.
The most to better implement the present invention, following set-up mode is used especially: said two transmitting coil is respectively
Be the first transmitting coil and the second transmitting coil, the first transmitting coil and the second transmitting coil the first end the most respectively with emitter
Being connected with receptor, the second end of the first transmitting coil and the second transmitting coil connects and ground connection altogether, described first transmitting coil
Overlapping with the second transmitting coil and overlapping part width is 88mm.
The most to better implement the present invention, following set-up mode is used especially: be provided with in described receptor and depend on
The amplifying circuit of secondary connection and d type flip flop circuit, the first end of described first transmitting coil connects the anti-phase input of amplifying circuit
End, the first end of described second transmitting coil connects the in-phase input end of amplifying circuit, and described timing circuit connects d type flip flop electricity
Road.
The most to better implement the present invention, following set-up mode is used especially: be also connected with on described receptor
Audio system, described receptor is had to be connected on the outfan of d type flip flop circuit.
The most to better implement the present invention, following set-up mode is used especially: described audio system includes mutually
The acoustics circuit connected and horn circuit, described receptor is connected with acoustics circuit.
The most to better implement the present invention, following set-up mode is used especially: described loudspeaker use double horn.
The most to better implement the present invention, following set-up mode is used especially: set in described voltage-stabilizing power supply system
It is equipped with resistance R1, controllable accurate source of stable pressure D1, audion Q1, audion Q2, integrated transporting discharging U1, electric capacity C1, resistance R2, resistance
R3, potentiometer W1 and electric capacity C2, first end of resistance R1 colelctor electrode with audion Q1 and audion Q2 respectively is connected, resistance
Second end of R1 is connected with the negative electrode of controllable accurate source of stable pressure D1, the anode of controllable accurate source of stable pressure D1 and the second of resistance R3
End, second end of electric capacity C2 and ground are connected；The in-phase input end of integrated transporting discharging U1 and the reference pole of controllable accurate source of stable pressure D1
Being connected, the inverting input of integrated transporting discharging U1 is connected with second end of electric capacity C1 and the control end of potentiometer W1 respectively；Collection
The outfan becoming amplifier U1 is connected with the base stage of audion Q1, and the emitter stage of audion Q1 is connected with the base stage of audion Q2, and three
The emitter stage of pole pipe Q2 respectively with first end of electric capacity C1, first end of resistance R2, first end of electric capacity C2 and the confession of emitter
Electricity end is connected, and second end of resistance R2 end fixing with of potentiometer W1 is connected, another of potentiometer W1 be fixing hold and
First end of resistance R3 connects.
The present invention compared with prior art, has the following advantages and beneficial effect:
The present invention can be powered based on voltage-stabilizing power supply system, and metal object is detected by the technology changed by magnetoelectricity, adopts
Can complete metal detecting with small and exquisite design, whole method step is simple, easy to use, the metal object in suitable multiple place
Detection.
The present invention utilizes the mu balanced circuit being connected with external power supply to be made by being detected process circuit by voltage transformation
DC source, and supply detection and process circuit and make its work, overcome prior art to use aneroid battery flying power not enough
Drawback, so that the work that this metal detecting system can be steady in a long-term.
Hiding metal can quickly be detected by the present invention, by using dual coil designs, changes based on magnetoelectricity
Principle works and designed system, has fast response time, feature easy to use.
Accompanying drawing explanation
Fig. 1 is metal detecting system structural representation of the present invention.
Wherein, 2-emitter, 3-the first transmitting coil, 4-the second transmitting coil, 5-receptor, 6-timing circuit, 7-sound
Ring circuit, 8-horn circuit, 9-amplifying circuit, 10-D flip-flop circuit.
Detailed description of the invention
Below in conjunction with embodiment, the present invention is described in further detail, but embodiments of the present invention are not limited to this.
Embodiment 1:
A kind of metal probing method based on mu balanced circuit Application Design, it is possible to be powered based on voltage-stabilizing power supply system, pass through
Metal object is detected by the technology of magnetoelectricity conversion, uses small and exquisite design can complete metal detecting, whole method step
Simply, easy to use, the metal detecting in suitable multiple place, as it is shown in figure 1, be specifically arranged to following set-up mode: utilize
The metal detecting system that voltage-stabilizing power supply system and detection system are formed carries out the detection of metal, including step in detail below:
1) emitter 2 forms probing wave signal, and by the coil for carrying out signal transmitting in transmission coil system by spy
Survey ripple signal to launch；
2) probing wave signal is when contacting with metal object, produces magnetic field near metal object due to eddy current effect；
3) when, after probing wave signal ended, eddy current continues to flow, in magnetoelectric effect in the coil for carrying out signal transmitting
Under effect, in transmission coil system, induced voltage will be produced in the coil carrying out signal reception；
4) induced voltage is transported in receptor 5 by the coil being used for carrying out signal reception；
5) induced voltage is carried out utilizing audio system to send prompt tone after rectification, amplification etc. process by receptor 5.
Embodiment 2:
The present embodiment is to optimize further on the basis of above-described embodiment, the most to better implement the present invention, such as Fig. 1
Shown in, use especially following set-up mode: also include the step that running voltage is provided for emitter 2:
A.1) voltage after filtering output is by the reference voltage electricity by being mainly made up of resistance R1 and controllable accurate source of stable pressure D1
Road provides voltage reference；
A.2) sample circuit being mainly made up of resistance R2, resistance R3, potentiometer W1 is sampled from output filtering end, is taken
Sample voltage；
A.3) sampling voltage utilizes the comparison being mainly made up of audion Q1, audion Q2, integrated transporting discharging U1, electric capacity C1 to amplify
Circuit combines the voltage reference that reference voltage circuit provides, and carries out voltage ratio relatively；
A.4) when sampling voltage is compared with reference voltage, sampling voltage is too high, then adaptive by comparing amplifying circuit
Regulation makes the voltage from comparing amplifying circuit output reduce, and vice versa；
A.5) output filter circuit being mainly made up of electric capacity C2 will be utilized to carry out ripple from the voltage comparing amplifying circuit output
Filter；
A.6) regulated power supply after ripple filters is supplied emitter 2 emitter 2 is worked and is in steady operation shape
State.
Embodiment 3:
The present embodiment is to optimize further on the basis of any of the above-described embodiment, as it is shown in figure 1, be further the most real
The existing present invention, uses following set-up mode especially: described metal detecting system be provided with interconnective voltage-stabilizing power supply system and
Detection system, is provided with transmission coil system, emitter 2, timing circuit 6, receptor 5 and sound system in described detection system
System, described transmission coil system is connected with voltage-stabilizing power supply system, emitter 2 and receptor 5 respectively, and described emitter 2 connects
Timing circuit 6, described transmission coil system includes two transmitting coils, and one end of two transmitting coils respectively with emitter 2
Being connected with receptor 5, the other end ground connection of two transmitting coils, the circle diameter of described transmitting coil is 180mm, and launches
Coil uses No. 28 copper cash, and the number of turn of transmitting coil is 20 ~ 24 circles.
Emitter 2 is by one the big current impulse of a coil transmissions, due to eddy current effect near metal object
Producing magnetic field, after launching end-of-pulsing, eddy current continues to flow in coil, and produces voltage in another coil and return to
Receptor 5, compares detection and amplifies.
Embodiment 4:
The present embodiment is to optimize further on the basis of any of the above-described embodiment, as it is shown in figure 1, be further the most real
The existing present invention, it is possible to two coils are carried out reasonable Arrangement, thus improves detection accuracy, the especially following set-up mode of employing: institute
State two transmitting coils and be respectively the first transmitting coil 3 and the second transmitting coil 4, the first transmitting coil 3 and the second transmitting coil 4
The first end be connected with emitter 2 and receptor 5 the most respectively, the second end of the first transmitting coil 3 and the second transmitting coil 4 is altogether
Connecing and ground connection, described first transmitting coil 3 and overlapping and overlapping part the width of the second transmitting coil 4 are 88mm.
Embodiment 5:
The present embodiment is to optimize further on the basis of any of the above-described embodiment, as it is shown in figure 1, be further the most real
The existing present invention, it is possible to carry out detection in the voltage produced in coil is transferred to receptor and amplify, in case subsequent conditioning circuit processes, special
Do not use following set-up mode: in described receptor 5, be provided with the amplifying circuit 9 being sequentially connected with and d type flip flop circuit 10, described
First end of the first transmitting coil 3 connects the inverting input of amplifying circuit 9, and the first end of described second transmitting coil 4 connects
The in-phase input end of amplifying circuit 9, described timing circuit 6 connects d type flip flop circuit 10.
Embodiment 6:
The present embodiment is to optimize further on the basis of any of the above-described embodiment, the most to better implement the present invention,
After the voltage formed after detection can being received device process, trigger audio system, by the way of voice message, inform spy
, there is metal object in survey person near coil, as it is shown in figure 1, use following set-up mode especially: also connect on described receptor 5
Being connected to audio system, described receptor 5 is connected on the outfan of d type flip flop circuit 10.
Embodiment 7:
The present embodiment is to optimize further on the basis of any of the above-described embodiment, as it is shown in figure 1, be further the most real
The existing present invention, it is possible to utilize acoustics circuit and horn circuit to amplify so that user understand that and there is gold near coil
Belong to thing, use following set-up mode especially: described audio system includes interconnective acoustics circuit 7 and horn circuit 8, described
Receptor 5 is connected with acoustics circuit 7.
Embodiment 8:
The present embodiment is to optimize further on the basis of any of the above-described embodiment, it is possible to use the form of played in stereo to carry out
Sound prompting, as it is shown in figure 1, the most to better implement the present invention, the following set-up mode of employing especially: described loudspeaker 8
Use double horn.
Embodiment 9:
The present embodiment is to optimize further on the basis of any of the above-described embodiment, as it is shown in figure 1, be further the most real
The existing present invention, uses following set-up mode: be provided with resistance R1, controllable accurate source of stable pressure in described voltage-stabilizing power supply system especially
D1, audion Q1, audion Q2, integrated transporting discharging U1, electric capacity C1, resistance R2, resistance R3, potentiometer W1 and electric capacity C2, resistance R1
The first end colelctor electrode with audion Q1 and audion Q2 respectively be connected, second end of resistance R1 and controllable accurate source of stable pressure
The negative electrode of D1 is connected, and the anode of controllable accurate source of stable pressure D1 is connected with second end of resistance R3, second end of electric capacity C2 and ground
Connect；The in-phase input end of integrated transporting discharging U1 is connected with the reference pole of controllable accurate source of stable pressure D1, and integrated transporting discharging U1's is anti-phase defeated
Enter end to be connected with second end of electric capacity C1 and the control end of potentiometer W1 respectively；The outfan of integrated transporting discharging U1 and audion Q1
Base stage be connected, the emitter stage of audion Q1 is connected with the base stage of audion Q2, the emitter stage of audion Q2 respectively with electric capacity C1
The first end, the feeder ear of first end of resistance R2, first end of electric capacity C2 and emitter (2) is connected, the second of resistance R2
Holding one with potentiometer W1 fixing end to be connected, another fixing end of potentiometer W1 is connected with first end of resistance R3.
External power supply after voltage-stabilizing power supply system will process after filtering is converted to the unidirectional current that detection system can use
Source, described integrated transporting discharging U1 uses LM358, and uses any one operational amplification circuit of LM358；Described controllable accurate voltage stabilizing
Source D1 uses TL431, described electric capacity C1 and electric capacity C2 all to use electrochemical capacitor and the first end to be all positive terminal.
Emitter launches a big current impulse by a coil (first transmitting coil 3 or the second transmitting coil 4),
Produce magnetic field near metal object due to eddy current effect, after launching end-of-pulsing, eddy current continues in coil (the first transmitting
Coil 3 or the second transmitting coil 4) interior flowing, and produce in another coil (second transmitting coil 4 or the first transmitting coil 3)
Raw voltage returns to receptor 5, compares detection and amplifies, and finally starts acoustics circuit 7 and utilizes horn circuit 8 generation sound
Ringing, horn circuit 8 uses stereophonic effect to design so that user can more clearly be heard, with instruction near coil
With the presence of metal object.
The above, be only presently preferred embodiments of the present invention, and the present invention not does any pro forma restriction, every depends on
Any simple modification of being made above example according to the technical spirit of the present invention, equivalent variations, each fall within the protection of the present invention
Within the scope of.
Claims (9)
1. a metal probing method based on mu balanced circuit Application Design, it is characterised in that: utilize voltage-stabilizing power supply system and spy
The metal detecting system that examining system is formed carries out the detection of metal, including step in detail below:
1) emitter (2) forms probing wave signal, and by the coil general for carrying out signal transmitting in transmission coil system
Probing wave signal is launched；
2) probing wave signal is when contacting with metal object, produces magnetic field near metal object due to eddy current effect；
3) when, after probing wave signal ended, eddy current continues to flow, in magnetoelectric effect in the coil for carrying out signal transmitting
Under effect, in transmission coil system, induced voltage will be produced in the coil carrying out signal reception；
4) induced voltage is transported in receptor (5) by the coil being used for carrying out signal reception；
5) induced voltage is carried out utilizing audio system to send prompt tone after rectification, amplification etc. process by receptor (5).
A kind of metal probing method based on mu balanced circuit Application Design the most according to claim 1, it is characterised in that: also
Step including providing running voltage for emitter (2):
A.1) voltage after filtering output is by the reference voltage electricity by being mainly made up of resistance R1 and controllable accurate source of stable pressure D1
Road provides voltage reference；
A.2) sample circuit being mainly made up of resistance R2, resistance R3, potentiometer W1 is sampled from output filtering end, is taken
Sample voltage；
A.3) sampling voltage utilizes the comparison being mainly made up of audion Q1, audion Q2, integrated transporting discharging U1, electric capacity C1 to amplify
Circuit combines the voltage reference that reference voltage circuit provides, and carries out voltage ratio relatively；
A.4) when sampling voltage is compared with reference voltage, sampling voltage is too high, then adaptive by comparing amplifying circuit
Regulation makes the voltage from comparing amplifying circuit output reduce, and vice versa；
A.5) output filter circuit being mainly made up of electric capacity C2 will be utilized to carry out ripple from the voltage comparing amplifying circuit output
Filter；
A.6) regulated power supply after ripple filters being supplied emitter (2) makes emitter (2) work and be in stable work
Make state.
A kind of metal probing method based on mu balanced circuit Application Design the most according to claim 2, it is characterised in that: institute
State metal detecting system and be provided with interconnective voltage-stabilizing power supply system and detection system, in described detection system, be provided with transmitting
Coil system, emitter (2), timing circuit (6), receptor (5) and audio system, described transmission coil system respectively with voltage stabilizing
Electric power system, emitter (2) are connected with receptor (5), and described emitter (2) connects timing circuit (6), described transmitting coil
System includes two transmitting coils, and one end of two transmitting coils is connected with emitter (2) and receptor (5) respectively, two
The other end ground connection of individual transmitting coil, the circle diameter of described transmitting coil is 180mm, and transmitting coil uses No. 28 copper cash,
The number of turn of transmitting coil is 20～24 circles.
A kind of metal probing method based on mu balanced circuit Application Design the most according to claim 3, it is characterised in that: institute
State two transmitting coils and be respectively the first transmitting coil (3) and the second transmitting coil (4), the first transmitting coil (3) and second
First end of ray circle (4) is connected with emitter (2) and receptor (5) the most respectively, and the first transmitting coil (3) and second is launched
Second end of coil (4) connects and ground connection altogether, described first transmitting coil (3) and the second transmitting coil (4) overlap and overlapping part
Width be 88mm.
A kind of metal probing method based on mu balanced circuit Application Design the most according to claim 4, it is characterised in that: institute
The amplifying circuit (9) and d type flip flop circuit (10) being sequentially connected with, described first transmitting coil (3) it is provided with in stating receptor (5)
First end connect amplifying circuit (9) inverting input, described second transmitting coil (4) first end connect amplifying circuit
(9) in-phase input end, described timing circuit (6) connects d type flip flop circuit (10).
A kind of metal probing method based on mu balanced circuit Application Design the most according to claim 5, it is characterised in that:
Being also associated with audio system on described receptor (5), described receptor (5) is connected on the outfan of d type flip flop circuit (10).
A kind of metal probing method based on mu balanced circuit Application Design the most according to claim 6, it is characterised in that: institute
State audio system and include interconnective acoustics circuit (7) and horn circuit (8), described receptor (5) and acoustics circuit (7) phase
Connect.
A kind of metal probing method based on mu balanced circuit Application Design the most according to claim 7, it is characterised in that: institute
State loudspeaker (8) and use double horn.
A kind of metal probing method based on mu balanced circuit Application Design the most according to claim 3, it is characterised in that: institute
Resistance R1, controllable accurate source of stable pressure D1, audion Q1, audion Q2, integrated transporting discharging U1, electricity it is provided with in stating voltage-stabilizing power supply system
Hold first end of C1, resistance R2, resistance R3, potentiometer W1 and electric capacity C2, resistance R1 respectively with audion Q1's and audion Q2
Colelctor electrode is connected, and second end of resistance R1 is connected with the negative electrode of controllable accurate source of stable pressure D1, controllable accurate source of stable pressure D1's
Anode is connected with second end of resistance R3, second end of electric capacity C2 and ground；The in-phase input end of integrated transporting discharging U1 and controlled essence
The reference pole of close source of stable pressure D1 is connected, the inverting input of integrated transporting discharging U1 respectively with the second end and the potentiometer W1 of electric capacity C1
Control end be connected；The outfan of integrated transporting discharging U1 is connected with the base stage of audion Q1, the emitter stage of audion Q1 and three poles
The base stage of pipe Q2 is connected, the emitter stage of audion Q2 respectively with first end of electric capacity C1, first end of resistance R2, the of electric capacity C2
The feeder ear of one end and emitter (2) is connected, and second end of resistance R2 is connected with one of potentiometer W1 fixing end, potentiometer
Another fixing end of W1 is connected with first end of resistance R3.
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| CN203705660U (en) * | 2013-12-20 | 2014-07-09 | 重庆市永川区益锐机械有限责任公司 | Double-coil metal detection circuit |
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Application publication date: 20161214 |