CN209471251U - A kind of metal detection sensing integrated circuit and metal detection sensor circuit - Google Patents
A kind of metal detection sensing integrated circuit and metal detection sensor circuit Download PDFInfo
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- CN209471251U CN209471251U CN201920504740.7U CN201920504740U CN209471251U CN 209471251 U CN209471251 U CN 209471251U CN 201920504740 U CN201920504740 U CN 201920504740U CN 209471251 U CN209471251 U CN 209471251U
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Abstract
The utility model relates to technical field of integrated circuits, specifically disclose a kind of metal detection sensing integrated circuit, wherein, it include: rectification/gain control module, demodulation module, filtering/amplification module, constant-current source and biasing module, LDO module and output driving module, rectification/gain control module input terminal inputs the alternating signal of metal electromagnetic induction sensor output, output end is connect with demodulation module, the input terminal connection constant-current source and biasing module of demodulation module, output end is connect with filtering/amplification module, filtering/amplification module input terminal connects constant-current source and biasing module, output end is connect with output driving module, output driving module connects constant-current source and biasing module and microcontroller, LDO module is connect with constant-current source and biasing module and output driving module.The invention also discloses a kind of metal detection sensor circuits.Metal detection sensing integrated circuit provided by the utility model has advantage compact-sized, at low cost, applied widely and safe and reliable.
Description
Technical field
The utility model relates to technical field of integrated circuits more particularly to a kind of metal detection sensing integrated circuit and including
The metal detection sensor circuit of the metal detection sensing integrated circuit.
Background technique
Currently, metal detection transducing signal handles usually using the very high MCU of price and some discrete devices and leads to
It is combined with IC, not only volume is big, and it is at high cost, also it is unfavorable for stable mass production.
Summary of the invention
The utility model aims to solve at least one of the technical problems existing in the prior art, provides a kind of metal detection biography
Feel integrated circuit and the metal detection sensor circuit including the metal detection sensing integrated circuit, it is in the prior art to solve
Problem.
As the first aspect of the utility model, a kind of metal detection sensing integrated circuit is provided, wherein the metal
Detection sensing integrated circuit includes: rectification/gain control module, demodulation module, filtering/amplification module, constant-current source and biasing mould
Block, LDO module and output driving module, the input terminal of the rectification/gain control module is for inputting metal electromagnetic induction biography
The alternating signal of sensor output, and it is separately connected the constant-current source and biasing module and the port AGC, the rectification/gain control
The output end of molding block is connect with the demodulation module, the input terminal of the demodulation module be also respectively connected with the constant-current source and partially
Module and external capacitor port are set, the output end of the demodulation module is connect with filtering/amplification module input terminal, the filter
Wave/amplification module input terminal connects the constant-current source and biasing module, the output end of the filtering/amplification module with it is described defeated
The input terminal connection of drive module, the input terminal of the output driving module are also connected with the constant-current source and biasing module, institute out
The output end of output driving module is stated for connecting microcontroller, the LDO module respectively with the constant-current source and biasing module
And the output driving module connection, the constant-current source and biasing module are also powered with external resistance port and pressure stabilizing respectively
Port connection；
The LDO module is for providing burning voltage；
The constant-current source and biasing module are for providing stabling current；
Rectification/the gain control module is for rectifying the alternating signal under the action of stabling current
Processing and gain amplification disposal obtain the signal after rectification/gain process；
The demodulation module can carry out the signal after the rectification/gain process under the action of stabling current
Demodulation obtains demodulated signal；
The filtering/amplification module can be filtered the demodulated signal under the action of stabling current/is put
Big processing obtains filter and amplification signal；
The output driving module is used to export filter and amplification to the microcontroller under the action of stabling current
Signal.
Preferably, the constant-current source and biasing module include: the first triode, the second triode, third transistor, the 4th
Triode, the 5th triode, the 6th triode, the 7th triode, the 8th triode and first resistor, first triode
The emitter connection pressure stabilizing supply port, the external resistance port of collector connection of first triode, the described 1st
The base stage of pole pipe is connect with the base stage of second triode, the emitter of second triode and the pressure stabilizing supply port
Connection, the collector of second triode connect the collector of the third transistor, the emitter of the third transistor
Power ground is connected, the base stage of the third transistor connects the base stage of the 4th triode, the transmitting of the 4th triode
Pole connects power ground, and the collector of the 4th triode connects the collector of the 6th triode, the 6th triode
Emitter connect power end, the base stage of the 6th triode connects the base stage of the 7th triode, the seven or three pole
The emitter of pipe connects power end, and the collector of the 7th triode connects the output driving module, the seven or three pole
The base stage of pipe is connect with the base stage of the 8th triode, the emitter connection power end of the 8th triode, and the described 8th
The collector of triode connects the output driving module, the base stage of the 5th triode and the base stage of the 4th triode
The emitter of connection, the 5th triode connects the power ground, the collection of the 5th triode by the first resistor
Electrode connects the output driving module.
Preferably, the rectification/gain control module includes first capacitor, the second capacitor, second resistance and the 9th 3 pole
Pipe, the first capacitor are arranged in parallel between the base stage and emitter of second triode, and the second capacitor parallel connection is set
It sets between the base stage and emitter of the third transistor, the base stage of the 9th triode is the rectification gain control molding
The collector of the input terminal of block, the 9th triode is connect with demodulation module and the port AGC respectively, and the described 9th 3
The emitter of pole pipe connects the external capacitor port, the second resistance be arranged in the base stage of the 9th triode with it is described
Between the port AGC.
Preferably, the tenth triode of demodulation module and the 11st triode, the base stage of the tenth triode and institute
One end connection of first capacitor is stated, the emitter of the tenth triode connect with the other end of the first capacitor, and described the
The collector of ten triodes is connect with the collector of the 9th triode, the base stage and the described tenth of the 11st triode
The base stage of triode connects, and the emitter of the 11st triode is connect with the emitter of the tenth triode, and described the
The collector of 11 triodes is connect with the filtering/amplification module.
Preferably, the filtering/amplification module includes third capacitor, 3rd resistor, the 12nd triode and the 4th resistance,
One end after the third capacitor is in parallel with the 3rd resistor connect the collector of the tenth triode, the third capacitor
The other end after in parallel with the 3rd resistor connect the base stage of the 12nd triode, the current collection of the 12nd triode
Pole connects the output driving module, and the emitter of the 12nd triode connects one end of the 4th resistance, and described the
The other end of four resistance connects power ground.
Preferably, the output driving module includes the 5th resistance, the 13rd triode and the 14th triode, and described the
One end of five resistance is connect with the collector of the 12nd triode, the other end and the described 13rd of the 5th resistance
The base stage of pole pipe connects, and the collector of the 13rd triode is connect with the collector of the 7th triode, and the described tenth
The emitter of three triodes is connect with the collector of the 5th triode, the base stage and the described 5th of the 14th triode
The collector of triode connects, and the collector of the 14th triode connects microcontroller, the hair of the 14th triode
Emitter-base bandgap grading connects power ground.
Preferably, the output driving module further includes the 15th triode, the base stage of the 15th triode and institute
The collector connection of the 13rd triode is stated, the collector of the 15th triode and the collector of the 8th triode connect
It connects, the emitter of the 15th triode connects microcontroller.
As the second aspect of the utility model, a kind of metal detection sensor circuit is provided, wherein the metal is visited
Surveying sensor circuit includes metal electromagnetic induction sensor, microcontroller and previously described metal detection sensing integrated circuit,
Rectification/gain control module input terminal of the metal electromagnetic induction sensor and the metal detection sensing integrated circuit connects
It connects, the microcontroller is connect with the output end of the output driving module of the metal detection sensing integrated circuit.
Metal detection sensing integrated circuit provided by the utility model passes through the moulds such as rectification/gain, demodulation, filtering/amplification
The alternating signal that block exports metal electromagnetic induction sensor is handled, can be effective by the signal of metal detection sensor
It is converted into digital signal, in order to subsequent data processing, there is compact-sized, long service life, the at low cost, scope of application
Wide and safe and reliable advantage.
Detailed description of the invention
Attached drawing is to be used to provide a further understanding of the present invention, and constitute part of specification, and following
Specific embodiment be used to explain the utility model together, but do not constitute limitations of the present invention.In the accompanying drawings:
Fig. 1 is the structural block diagram of metal detection sensing integrated circuit provided by the utility model.
Fig. 2 is the circuit diagram of metal detection sensing integrated circuit provided by the utility model.
Fig. 3 is application schematic diagram of the metal detection sensing integrated circuit shown in Fig. 2 in metal detection sensor circuit.
Specific embodiment
Specific embodiment of the present utility model is described in detail below in conjunction with attached drawing.It should be understood that herein
Described specific embodiment is only used for describing and explaining the present invention, and is not intended to limit the utility model.
As the first aspect of the utility model, a kind of metal detection sensing integrated circuit is provided, wherein such as Fig. 1 institute
Show, the metal detection sensing integrated circuit 100 includes: rectification/gain control module 110, demodulation module 120, filtering/amplification
Module 130, constant-current source and biasing module 140, LDO module 150 and output driving module 160, the rectification/gain control module
110 input terminal be used for input metal electromagnetic induction sensor output alternating signal, and be separately connected the constant-current source and
Biasing module 140 and the port AGC, the output end of the rectification/gain control module 110 are connect with the demodulation module 120, institute
The input terminal for stating demodulation module 120 is also respectively connected with the constant-current source and biasing module 140 and external capacitor port, the demodulation
The output end of module 120 is connect with the input terminal of filtering/amplification module 130, and the input terminal of the filtering/amplification module 130 connects
Connect the constant-current source and biasing module 140, the output end of the filtering/amplification module 130 and the output driving module 160
Input terminal connection, the input terminal of the output driving module 160 are also connected with the constant-current source and biasing module 140, the output
The output end of drive module 160 for connecting microcontroller, the LDO module 150 respectively with the constant-current source and biasing module
140 and the output driving module 160 connection, the constant-current source and biasing module 140 also respectively with external resistance port Rbs
And pressure stabilizing supply port Vreg connection；
The LDO module 150 is for providing burning voltage；
The constant-current source and biasing module 140 are for providing stabling current；
Rectification/the gain control module 110 is used to carry out the alternating signal under the action of stabling current
Rectification processing and gain amplification disposal obtain the signal after rectification/gain process；
The demodulation module 120 can be under the action of the stabling current to the signal after the rectification/gain process
It is demodulated to obtain demodulated signal；
Filtering/the amplification module 130 can be filtered the demodulated signal under the action of stabling current/
Enhanced processing obtains filter and amplification signal；
The output driving module 160 is used to put under the action of the stabling current to microcontroller output filtering
Big signal.
Metal detection sensing integrated circuit provided by the utility model passes through the moulds such as rectification/gain, demodulation, filtering/amplification
The alternating signal that block exports metal electromagnetic induction sensor is handled, can be effective by the signal of metal detection sensor
It is converted into digital signal, in order to subsequent data processing, there is compact-sized, long service life, the at low cost, scope of application
Wide and safe and reliable advantage.
Specifically, as shown in Fig. 2, the constant-current source and biasing module 140 include: the first triode P1, the second triode
P2, third transistor N1, the 4th triode N4, the 5th triode N5, the 6th triode P5, the 7th triode P6, the eight or three pole
The emitter of pipe P7 and first resistor R6, the first triode P1 connect the pressure stabilizing supply port, first triode
The collector of P1 connects external resistance port Rbs, the base stage of the base stage of the first triode P1 and the second triode P2
Connection, the emitter of the second triode P2 are connect with the pressure stabilizing supply port Vreg, the collection of the second triode P2
Electrode connects the collector of the third transistor N1, and the emitter of the third transistor N1 connects power ground GND, and described the
The base stage of three triode N1 connects the base stage of the 4th triode N4, and the emitter of the 4th triode N4 connects power ground
The collector of GND, the 4th triode N4 connect the collector of the 6th triode P5, the hair of the 6th triode P5
Emitter-base bandgap grading connects power end Vcc, and the base stage of the 6th triode P5 connects the base stage of the 7th triode P6, and the described 7th 3
The emitter of pole pipe P6 connects power end Vcc, and the collector of the 7th triode P6 connects the output driving module, described
The base stage of 7th triode P6 is connect with the base stage of the 8th triode P7, and the emitter of the 8th triode P7 connects electricity
The collector of source, the 8th triode P7 connects the output driving module, the base stage of the 5th triode N5 and institute
The base stage connection of the 4th triode N4 is stated, the emitter of the 5th triode N5 passes through the first resistor R6 connection electricity
The collector of source ground GND, the 5th triode N5 connect the output driving module.
Preferably, the first triode P1, the second triode P2, the 6th triode P5, the 7th triode P6 and the 8th
Triode P7 can be p-type triode, and third transistor N1, the 4th triode N4 and the 5th triode N5 can be three pole of N-type
Pipe.
Specifically, as depicted in figs. 1 and 2, the rectification/gain control module include first capacitor C1, the second capacitor C2,
Second resistance RR2 and the 9th triode N2, the first capacitor C1 are arranged in parallel base stage and hair in the second triode P2
Between emitter-base bandgap grading, the second capacitor C2 is arranged in parallel between the base stage and emitter of the third transistor N1, and the described 9th
The base stage of triode N2 be it is described rectification gain control module input terminal, the collector of the 9th triode N2 respectively with solution
Mode transfer block and the port AGC connection, the emitter of the 9th triode N2 connect the external capacitor port CAP, institute
Second resistance RR2 is stated to be arranged between the base stage and the port AGC of the 9th triode N2.
Preferably, the 9th triode N2 can be N-type triode.
Specifically, as shown in Fig. 2, the demodulation module the tenth triode P3 and the 11st triode P4, the described 13rd
The base stage of pole pipe P3 is connect with one end of the first capacitor C1, the emitter of the tenth triode P3 and the first capacitor
The other end of C1 connects, and the collector of the tenth triode P3 is connect with the collector of the 9th triode N2, and described the
The base stage of 11 triode P4 is connect with the base stage of the tenth triode P3, the emitter of the 11st triode P4 and institute
The emitter connection of the tenth triode P3 is stated, the collector of the 11st triode P4 is connect with the filtering/amplification module.
Preferably, the tenth triode P3 and the 11st triode P4 can be p-type triode.
Specifically, as shown in Fig. 2, the filtering/amplification module includes third capacitor C3,3rd resistor R2, the 12nd
One end after pole pipe N3 and the 4th resistance R5, the third capacitor C3 are in parallel with the 3rd resistor R2 connect the 13rd pole
The collector of pipe P3, the other end after the third capacitor C3 is in parallel with the 3rd resistor R2 connect the 12nd triode
The collector of the base stage of N3, the 12nd triode N3 connects the output driving module, the 12nd triode N3's
Emitter connects one end of the 4th resistance R5, and the other end of the 4th resistance R5 connects power ground.
Preferably, the 12nd triode N3 can be N-type triode.
Specifically, as shown in Fig. 2, the output driving module includes the 5th resistance R6, the 13rd triode N6 and the tenth
Four triode N8, one end of the 5th resistance R6 are connect with the collector of the 12nd triode N3, the 5th resistance
The other end of R6 is connect with the base stage of the 13rd triode N6, the collector and the described 7th of the 13rd triode N6
The collector of triode P6 connects, and the emitter of the 13rd triode N6 and the collector of the 5th triode N5 connect
It connects, the base stage of the 14th triode N8 is connect with the collector of the 5th triode N5, the 14th triode N8
Collector connect microcontroller, the emitter of the 14th triode N8 connects power ground.
Preferably, the 13rd triode N6 and the 14th triode N8 can be N-type triode.
Specifically, the output driving module further includes the 15th triode N7, the base stage of the 15th triode N7
It is connect with the collector of the 13rd triode N6, the collector and the 8th triode P7 of the 15th triode N7
Collector connection, the emitter of the 15th triode N7 connects microcontroller.
As shown in Fig. 2, VDC is power supply, VDC1 is pressure stabilizing power supply；When carrying out metal detection, an external LC oscillator,
As the distance of metal distance detection inductance is close, LC shock range can be reduced, and then be become larger on the contrary；Input port IN then can be to LC
The output amplitude of oscillator carries out detection amplification, and output one (takes with metal approach speed (influencing IC output pulse width) and distance
Certainly in IC sensitivity) relevant pulse signal handles to external MCU, to obtain the distance or number of speed of detected metal
According to.
Metal detection sensing integrated circuit provided by the utility model, due to being completed using very reliable bipolar device
Design, without the ESD defect that usual cmos device has, meanwhile, micro energy lose design is completed with bipolar device, power consumption can be with
Common CMOS IC is comparable, has the characteristics that strong antijamming capability, is suitable for harsh environment.The gold constituted with the utility model
Category detection instrument instrument structure is compact, and long service life is at low cost, wide adaptation range, securely and reliably.
As the second aspect of the utility model, a kind of metal detection sensor circuit is provided, wherein such as Fig. 1 and Fig. 3
Shown, the metal detection sensor circuit includes that metal electromagnetic induction sensor, microcontroller and previously described metal are visited
Survey sensing integrated circuit, rectification/gain control of the metal electromagnetic induction sensor and the metal detection sensing integrated circuit
The input terminal of molding block connects, the output of the output driving module of the microcontroller and the metal detection sensing integrated circuit
End connection.
Metal detection sensor circuit provided by the utility model, using metal detection sensing integrated circuit above,
It is handled by the alternating signal that the modules such as rectification/gain, demodulation, filtering/amplification export metal electromagnetic induction sensor,
The signal of metal detection sensor can be effectively converted into digital signal, in order to subsequent data processing, there is knot
Structure is compact, long service life, advantage at low cost, applied widely and safe and reliable.
It is understood that embodiment of above is merely to illustrate that the principles of the present invention and uses exemplary
Embodiment, however the utility model is not limited thereto.For those skilled in the art, this is not being departed from
In the case where the spirit and essence of utility model, various changes and modifications can be made therein, these variations and modifications are also considered as this reality
With novel protection scope.
Claims (8)
1. a kind of metal detection sensing integrated circuit, which is characterized in that the metal detection sensing integrated circuit include: rectification/
Gain control module, demodulation module, filtering/amplification module, constant-current source and biasing module, LDO module and output driving module, institute
Rectification/gain control module input terminal is stated for inputting the alternating signal of metal electromagnetic induction sensor output, and difference
Connect the constant-current source and biasing module and the port AGC, the output end and the demodulation module of the rectification/gain control module
Connection, the input terminal of the demodulation module are also respectively connected with the constant-current source and biasing module and external capacitor port, the solution
The output end of mode transfer block is connect with filtering/amplification module input terminal, and the input terminal of the filtering/amplification module connects the perseverance
Stream source and biasing module, the output end of the filtering/amplification module is connect with the input terminal of the output driving module, described defeated
The input terminal of drive module is also connected with the constant-current source and biasing module out, and the output end of the output driving module is for connecting
Microcontroller, the LDO module are connect with the constant-current source and biasing module and the output driving module respectively, the perseverance
Stream source and biasing module are also connect with external resistance port and pressure stabilizing supply port respectively；
The LDO module is for providing burning voltage；
The constant-current source and biasing module are for providing stabling current；
Rectification/the gain control module is for carrying out rectification processing to the alternating signal under the action of stabling current
And gain amplification disposal obtains the signal after rectification/gain process；
The demodulation module can demodulate the signal after the rectification/gain process under the action of stabling current
Obtain demodulated signal；
Filtering/the amplification module can be filtered the demodulated signal under the action of stabling current/amplification at
Reason obtains filter and amplification signal；
The output driving module is used to export filter and amplification signal to the microcontroller under the action of stabling current.
2. metal detection sensing integrated circuit according to claim 1, which is characterized in that the constant-current source and biasing module
It include: the first triode, the second triode, third transistor, the 4th triode, the 5th triode, the 6th triode, the seven or three
Pole pipe, the 8th triode and first resistor, the emitter connection pressure stabilizing supply port of first triode, described first
The collector of triode connects external resistance port, the base stage company of the base stage of first triode and second triode
It connects, the emitter of second triode is connect with the pressure stabilizing supply port, and the collector of second triode connects institute
The collector of third transistor is stated, the emitter of the third transistor connects power ground, and the base stage of the third transistor connects
The base stage of the 4th triode is connect, the emitter of the 4th triode connects power ground, the current collection of the 4th triode
Pole connects the collector of the 6th triode, and the emitter of the 6th triode connects power end, the 6th triode
Base stage connect the base stage of the 7th triode, the emitter of the 7th triode connects power end, the seven or three pole
The collector of pipe connects the output driving module, and the base stage of the 7th triode and the base stage of the 8th triode connect
It connects, the emitter of the 8th triode connects power end, and the collector of the 8th triode connects the output driving mould
The base stage of block, the 5th triode is connect with the base stage of the 4th triode, and the emitter of the 5th triode passes through
The first resistor connects the power ground, and the collector of the 5th triode connects the output driving module.
3. metal detection sensing integrated circuit according to claim 2, which is characterized in that the rectification/gain control molding
Block includes first capacitor, the second capacitor, second resistance and the 9th triode, and the first capacitor is arranged in parallel the described 2nd 3
Between the base stage and emitter of pole pipe, second capacitor be arranged in parallel the third transistor base stage and emitter it
Between, the base stage of the 9th triode is the input terminal of the rectification gain control module, the collector of the 9th triode
It being connect respectively with demodulation module and the port AGC, the emitter of the 9th triode connects the external capacitor port,
The second resistance is arranged between the base stage and the port AGC of the 9th triode.
4. metal detection sensing integrated circuit according to claim 3, which is characterized in that the 13rd pole of demodulation module
Pipe and the 11st triode, the base stage of the tenth triode are connect with one end of the first capacitor, the tenth triode
Emitter connect with the other end of the first capacitor, the collection of the collector of the tenth triode and the 9th triode
Electrode connection, the base stage of the 11st triode are connect with the base stage of the tenth triode, the 11st triode
Emitter is connect with the emitter of the tenth triode, the collector and the filtering/amplification mould of the 11st triode
Block connection.
5. metal detection sensing integrated circuit according to claim 4, which is characterized in that the filtering/amplification module packet
Third capacitor, 3rd resistor, the 12nd triode and the 4th resistance are included, after the third capacitor is in parallel with the 3rd resistor
One end connects the collector of the tenth triode, and the other end after the third capacitor is in parallel with the 3rd resistor connect institute
State the base stage of the 12nd triode, the collector of the 12nd triode connects the output driving module, and the described 12nd
The emitter of triode connects one end of the 4th resistance, and the other end of the 4th resistance connects power ground.
6. metal detection sensing integrated circuit according to claim 5, which is characterized in that the output driving module includes
5th resistance, the 13rd triode and the 14th triode, one end of the 5th resistance and the collection of the 12nd triode
Electrode connection, the other end of the 5th resistance are connect with the base stage of the 13rd triode, the 13rd triode
Collector is connect with the collector of the 7th triode, emitter and the 5th triode of the 13rd triode
Collector connection, the base stage of the 14th triode are connect with the collector of the 5th triode, the 14th pole
The collector of pipe connects microcontroller, and the emitter of the 14th triode connects power ground.
7. metal detection sensing integrated circuit according to claim 6, which is characterized in that the output driving module is also wrapped
The 15th triode is included, the base stage of the 15th triode is connect with the collector of the 13rd triode, and the described tenth
The collector of five triodes is connect with the collector of the 8th triode, and the emitter of the 15th triode connects micro-control
Device processed.
8. a kind of metal detection sensor circuit, which is characterized in that the metal detection sensor circuit includes metal electromagnetism sense
Metal detection sensing integrated circuit described in any one of inductive sensing device, microcontroller and claim 1 to 7, the metal
Electromagnetic induction sensor is connect with rectification/gain control module input terminal of the metal detection sensing integrated circuit, described
Microcontroller is connect with the output end of the output driving module of the metal detection sensing integrated circuit.
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| CN109932750A (en) * | 2019-04-15 | 2019-06-25 | 王开 | A kind of metal detection sensing integrated circuit and metal detection sensor circuit |
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| CN109932750A (en) * | 2019-04-15 | 2019-06-25 | 王开 | A kind of metal detection sensing integrated circuit and metal detection sensor circuit |
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Effective date of registration: 20200507 Address after: 214000 106, No. 8, JINGMAO Road, Binhu District, Wuxi City, Jiangsu Province Patentee after: Wuxi TOPO Microelectronics Co., Ltd Address before: 214062, room 42, Golden View Garden, Golden Lake, Binhu District, Binhu District, Jiangsu, Wuxi, 301 Patentee before: Wang Kai |
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