CN208688549U - A kind of touching device of short distance detection - Google Patents
A kind of touching device of short distance detection Download PDFInfo
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- CN208688549U CN208688549U CN201821089963.3U CN201821089963U CN208688549U CN 208688549 U CN208688549 U CN 208688549U CN 201821089963 U CN201821089963 U CN 201821089963U CN 208688549 U CN208688549 U CN 208688549U
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Abstract
The utility model discloses a kind of touching devices of short distance detection, the touching device includes detection module, processing module and output module, the detection module includes first detection module, second detection module and third detection module, the first detection module includes induction electrode and the first oscillating circuit, the induction electrode is electrically connected with the first oscillating circuit, second detection module includes detection coil and the second oscillating circuit, the detection coil is electrically connected with the second oscillating circuit, the third detection module includes temperature sensor and third oscillating circuit, the temperature sensor and the electrical connection of third oscillating circuit；The output module includes detecting circuit, amplification and rectification circuit and output circuit.Three kinds of different measurement circuit designs into the same touching device, are allowed three kinds of different detection circuits to coordinate by the utility model, and the common transmission and detection for carrying out signal strengthens the precision of detection information, effectively practical.
Description
Technical field
The utility model relates to sensor field, the touching device of specifically a kind of short distance detection.
Background technique
With the fast development of electronic technology, control technology also is correspondingly starting to develop, and since sensor self-application,
It is just constantly subjected to our concern, is widely used in all trades and professions, many conveniences are provided for people's lives.
And the sensor nowadays produced in the market is broadly divided into capacitive proximity sensor, electricity according to its working principle
Sense type proximity sensor and high frequency oscillation type proimity sensor, and these sensors can only all be carried out using a kind of detection mode
The detection and transmission of information, but the needs of sensing mode single sometimes meets us there is no method, the letter detected
Breath often will appear omission or error situation, and this phenomenon is unfavorable for us and actually uses and operate.
For above situation, it would be desirable to the touching device for designing a kind of short distance detection, by three kinds of different detection electricity
Road is designed into the same touching device, and three kinds of different detection circuits are coordinated, the common biography for carrying out signal
Defeated and detection, strengthens the precision of detection information, effectively practical.
Utility model content
The purpose of this utility model is to provide a kind of touching devices of short distance detection, to solve in the prior art ask
Topic.
To achieve the above object, the utility model provides the following technical solutions: a kind of touching device of short distance detection, institute
Stating touching device includes the detection module being sequentially connected electrically, processing module and output module, and the detection module includes the first inspection
Survey module, the second detection module and third detection module, the first detection module includes induction electrode and the first oscillating circuit,
The induction electrode is electrically connected with the first oscillating circuit, and second detection module includes detection coil and the second oscillating circuit,
The detection coil is electrically connected with the second oscillating circuit, and the third detection module includes temperature sensor and third oscillation electricity
Road, the temperature sensor and the electrical connection of third oscillating circuit；The output module include detecting circuit, amplification and rectification circuit and
Output circuit, first oscillating circuit, the second oscillating circuit, third oscillating circuit are electrically connected with processing module respectively, described
Processing module, detecting circuit, amplification and rectification circuit and output circuit are sequentially connected electrically.
Three kinds of different detection modules are devised in the utility model, wherein first detection module utilizes detection coil and quilt
The magnetic fields on detection object surface cause the change in oscillation of the first oscillating circuit, and the detection coil in oscillating circuit generates one
High frequency magnetic field, when object is close to magnetic field, since electromagnetic induction generates an induced current in object, with object
Proximity sensor, induced current enhancing, causes the load in oscillating circuit to increase, and oscillations are until stop, circuit is according to inspection
Measure the variation output detection signal of oscillatory regime.
Second detection module is the sensing that information is carried out using human body touch, when the finger of people touches touching device,
Finger forms coupled capacitor as a traveling electrode and induction electrode, carrys out the second oscillation electricity so as to cause the change of input capacitance
The frequency of oscillation on road, to generate trigger signal.
Third detection module detects the human body moved in environs using infrared temperature sensor, due to extraneous spoke
When penetrating and self-temperature being caused to change, infrared temperature sensor can provide a corresponding electric signal, and electric signal shakes by third
It exports after swinging the processing of circuit to processing module.
The oscillation change that first oscillating circuit, the second oscillating circuit and third oscillating circuit generate is handled through processing module,
Operation logic algorithm determines whether to continue to input, if so, being converted by detecting circuit, filter circuit and amplification and rectification circuit
Binary switching signal, is exported through output circuit；If it is not, the invalidating signal processing then transmitted.
Further, the temperature sensor includes optical filter, pipe cap, tube socket and pin, and the optical filter is mounted on pipe
On cap, the pipe cap is mounted on tube socket, and the first connector is provided on the pipe cap, the second connection is provided on the tube socket
Part, the pipe cap, tube socket are coupled by the first connector and the second connector, and the pin upper end passes through the fixed peace of pipe cap
Dress, is provided with sensing element, high value resistor and field effect transistor, the sensing element is mounted between the pipe cap and tube socket
Pipe cap bottom surface, the high value resistor and field effect transistor are installed on tube socket.
Further, first oscillating circuit, the second oscillating circuit are identical with the circuit structure of third oscillating circuit, institute
Stating the first oscillating circuit includes resistance R1, resistance R2, resistance R3, resistance R4, operational amplifier A1, capacitor C1 and capacitor C2, institute
It states the one end resistance R1 to connect with oscillating circuit input terminal J1, the other end is connect with resistance R2, the reverse phase of the operational amplifier A1
Input terminal L1 is connected between resistance R1, resistance R2, the non-inverting input terminal L2 of the operational amplifier A1 respectively with capacitor C1,
Resistance R4 is connected with capacitor C2, and the capacitor C1 is connect with resistance R3, is grounded after the capacitor C2 is in parallel with resistance R4, the fortune
The output end L3 for calculating amplifier A1 is connect with resistance R2, resistance R3 respectively, the output end L3 of the operational amplifier A1 and oscillation
The input terminal J2 connection of circuit.
Further, the detecting circuit includes diode D1 and filter circuit, and the filter circuit includes resistance R5, electricity
R6, resistance R7, capacitor C3, capacitor C4 and operational amplifier A2 are hindered, the one end the diode D1 and detecting circuit input terminal J3 connect
It connects, the diode D1 connects with resistance R5, and the resistance R5 is connect with the input terminal L4 of capacitor C3；The output of the capacitor C3
End L5 is connect with the output end L6 of operational amplifier A2, and the input terminal of the resistance R6 is connect with the input terminal L4 of capacitor C3, defeated
Outlet ground connection；The resistance R7 input terminal is connect with the output end L5 of capacitor C3, and the reverse phase of output end and operational amplifier A2 is defeated
Enter L7 is held to connect；The capacitor C4 input terminal is connect with the input terminal L4 of capacitor C3, and the other end is reversed with operational amplifier A2's
Input terminal L7 connection；The noninverting input L8 of the operational amplifier A2 is grounded, the output end L4 of the operational amplifier A2 with
The output end J4 connection of detecting circuit.
A kind of detecting circuit of diode and filter circuit design is utilized in the utility model, and processing module is exported first
Amplitude-modulated wave rectified, obtain required pulsating current, recycle filter circuit to inhibit or the signal for the useless frequency range that decays, disappear
Except the High-frequency Interference waveform generated after inversion, the signal of useful frequency range is transmitted to amplification and rectification circuit.
Further, the amplification and rectification circuit includes amplifying circuit and shaping circuit, and the amplifying circuit includes resistance
The output end J6 connection of R8, resistance R9, capacitor C5, capacitor C6 and triode T, the one end the capacitor C5 and amplifying circuit, it is described
Capacitor C5 connects with resistance R8, and the output end of the capacitor C5 is connect with the base stage port L9 of triode T；The triode T's
Emitter port L10 ground connection, the collector port L11 of the triode T are connect with resistance R9, capacitor C6 respectively, the resistance
The port L13 of the port L12 and resistance R9 of R8 are connect, the port L13 of the port L12 and resistance R9 of the resistance R8 respectively with put
The input terminal J5 connection of big circuit.
Further, the shaping circuit includes resistance R10, resistance R11, resistance R12, resistance R13, resistance R14, crystal
Pipe VT1 and transistor VT2, the shaping circuit input terminal J7 are connect with resistance R10, resistance R11 respectively, and the resistance R10 is defeated
Outlet is connect with the collector port L14 of transistor VT1；The resistance R11 output end respectively with resistance R12, transistor VT2
The L15 connection of collector port, the resistance R12 are connect with the base stage port L16 of transistor VT1, the resistance R12 and resistance
R13 series connection, the resistance R13 other end ground connection；The emitter of the emitter port L17 of the transistor VT1, transistor VT2
Port L18 is connect with resistance R14 respectively, the resistance R14 other end ground connection, the base stage port of the transistor VT2 and shaping
The output end J8 connection of circuit.
Amplifying circuit and shaping circuit are devised in the utility model, wherein the resistance R8 in amplifying circuit is amplifying circuit
Suitable quiescent point is provided, the collector current of amplification can be converted to the output voltage of triode T, capacitor by resistance R9
C5 can isolate direct current and the AC signal of input smoothly allowed to pass through, and capacitor C6 can isolate direct current and smoothly allow amplified friendship
Stream signal smoothly exports, and triode T then plays the role of an energy hole big with small control, former after amplifying circuit
This signal is enhanced rapidly, effectively practical.
The utility model also uses transistor VT1, transistor VT2 devises a kind of shaping circuit, puts through amplifying circuit
After big signal input shaper circuit, converts digital signals into analog signal and be transmitted to output circuit.
Compared with prior art, the utility model has the beneficial effects that the utility model devises a kind of short distance detection
Touching device, including first detection module, the second detection module, third detection module, processing module, detecting circuit,
Amplification and rectification circuit and output circuit, when people is close to touching device, the electric module of the first detection and third detection module open simultaneously
Dynamic, not only magnetic fields occur for detection coil and object to be detected surface, while temperature sensor triggers electric signal, causes respectively
The variation of first oscillating circuit, third oscillating circuit；When finger touches touching device, the starting of the second detection module, finger
Coupled capacitor is formed as a traveling electrode and induction electrode, carrys out the second oscillating circuit so as to cause changing for input capacitance
Frequency of oscillation.
When first detection module, the second detection module, third detection module are by electric signal transmission to processing module, place
Manage module output module issued and instruct, output signal to detecting circuit and carry out detection and filtering, by amplification and rectification circuit into
Output circuit output is transmitted to after row amplification, shaping.
When only any one or both signal passes in first detection module, the second detection module, third detection module
When transporting to processing module, processing module refusal issues instruction, and output module is in close state, invalidating signal.
Circuit structure is simple in the utility model, and signal transmission is quick sensitive, and three kinds of different measurement circuit designs are arrived
In the same touching device, three kinds of different detection circuits are coordinated, the common transmission and detection for carrying out signal,
The precision of detection information is increased, it is effectively practical.
Detailed description of the invention
In order to make the content of the utility model be easier to be clearly understood, below according to specific embodiment and combine attached
Figure, is described in further detail the utility model.
Fig. 1 is a kind of integrated circuit schematic diagram of the touching device of short distance detection of the utility model；
Fig. 2 is a kind of integral module schematic diagram of the touching device of short distance detection of the utility model；
Fig. 3 is a kind of arrangement of temperature sensor schematic diagram of the touching device of short distance detection of the utility model；
Fig. 4 is a kind of oscillating circuit schematic diagram of the touching device of short distance detection of the utility model；
Fig. 5 is a kind of detecting circuit schematic diagram of the touching device of short distance detection of the utility model；
Fig. 6 is a kind of amplifying circuit schematic diagram of the touching device of short distance detection of the utility model；
Fig. 7 is a kind of shaping circuit schematic diagram of the touching device of short distance detection of the utility model.
In figure: 1- optical filter, 2- pipe cap, the first connector of 3-, 4- sensing element, 5- high value resistor, 6- field effect transistor
Pipe, the second connector of 7-, 8- tube socket, 9- pin.
Specific embodiment
The following will be combined with the drawings in the embodiments of the present invention, carries out the technical scheme in the embodiment of the utility model
Clearly and completely describe, it is clear that the described embodiments are only a part of the embodiments of the utility model, rather than whole
Embodiment.Based on the embodiments of the present invention, those of ordinary skill in the art are without making creative work
Every other embodiment obtained, fall within the protection scope of the utility model.
Fig. 1-7 is please referred to, a kind of touching device of short distance detection, the touching device includes the detection being sequentially connected electrically
Module, processing module and output module, the detection module include first detection module, the second detection module and third detection mould
Block, the first detection module include induction electrode and the first oscillating circuit, and the induction electrode is electrically connected with the first oscillating circuit
It connects, second detection module includes detection coil and the second oscillating circuit, and the detection coil is electrically connected with the second oscillating circuit
It connects, the third detection module includes temperature sensor and third oscillating circuit, the temperature sensor and third oscillating circuit
Electrical connection；The output module includes detecting circuit, amplification and rectification circuit and output circuit, first oscillating circuit, second
Oscillating circuit, third oscillating circuit are electrically connected with processing module respectively, the processing module, detecting circuit, amplification and rectification circuit
It is sequentially connected electrically with output circuit.
Three kinds of different detection modules are devised in the utility model, wherein first detection module utilizes detection coil and quilt
The magnetic fields on detection object surface cause the change in oscillation of the first oscillating circuit, and the detection coil in oscillating circuit generates one
High frequency magnetic field, when object is close to magnetic field, since electromagnetic induction generates an induced current in object, with object
Proximity sensor, induced current enhancing, causes the load in oscillating circuit to increase, and oscillations are until stop, circuit is according to inspection
Measure the variation output detection signal of oscillatory regime.
Second detection module is the sensing that information is carried out using human body touch, when the finger of people touches touching device,
Finger forms coupled capacitor as a traveling electrode and induction electrode, carrys out the second oscillation electricity so as to cause the change of input capacitance
The frequency of oscillation on road, to generate trigger signal.
Third detection module detects the human body moved in environs using infrared temperature sensor, due to extraneous spoke
When penetrating and self-temperature being caused to change, infrared temperature sensor can provide a corresponding electric signal, and electric signal shakes by third
It exports after swinging the processing of circuit to processing module.
The oscillation change that first oscillating circuit, the second oscillating circuit and third oscillating circuit generate is handled through processing module,
Operation logic algorithm determines whether to continue to input, if so, being converted by detecting circuit, filter circuit and amplification and rectification circuit
Binary switching signal, is exported through output circuit；If it is not, the invalidating signal processing then transmitted.
The temperature sensor includes optical filter 1, pipe cap 2, tube socket 8 and pin 9, and the optical filter 1 is mounted on pipe cap 2
On, the pipe cap 2 is mounted on tube socket 8, and the first connector 3 is provided on the pipe cap 2, is provided with second on the tube socket 8
Connector 7, the pipe cap 2, tube socket 8 are coupled by the first connector 3 and the second connector 7, and 9 upper end of pin passes through
Pipe cap 2 is fixedly mounted, and sensing element 4, high value resistor 5 and field effect transistor 6, institute are provided between the pipe cap 2 and tube socket 8
It states sensing element 4 and is mounted on 2 bottom surface of pipe cap, the high value resistor 5 and field effect transistor 6 are installed on tube socket 8.
First oscillating circuit, the second oscillating circuit are identical with the circuit structure of third oscillating circuit, first vibration
Swinging circuit includes resistance R1, resistance R2, resistance R3, resistance R4, operational amplifier A1, capacitor C1 and capacitor C2, the resistance R1
One end is connect with oscillating circuit input terminal J1, and the other end is connect with resistance R2, the inverting input terminal L1 of the operational amplifier A1
Be connected between resistance R1, resistance R2, the non-inverting input terminal L2 of the operational amplifier A1 respectively with capacitor C1, resistance R4 and
Capacitor C2 connection, the capacitor C1 are connect with resistance R3, are grounded after the capacitor C2 is in parallel with resistance R4, the operational amplifier
The output end L3 of A1 is connect with resistance R2, resistance R3 respectively, the output end L3 of the operational amplifier A1 and oscillating circuit it is defeated
Enter J2 is held to connect.
The detecting circuit includes diode D1 and filter circuit, and the filter circuit includes resistance R5, resistance R6, resistance
R7, capacitor C3, capacitor C4 and operational amplifier A2, the one end the diode D1 are connect with detecting circuit input terminal J3, and described two
Pole pipe D1 connects with resistance R5, and the resistance R5 is connect with the input terminal L4 of capacitor C3；The output end L5 and fortune of the capacitor C3
The output end L6 connection of amplifier A2 is calculated, the input terminal of the resistance R6 is connect with the input terminal L4 of capacitor C3, output end ground connection；
The resistance R7 input terminal is connect with the output end L5 of capacitor C3, and the inverting input terminal L7 of output end and operational amplifier A2 connect
It connects；The capacitor C4 input terminal is connect with the input terminal L4 of capacitor C3, the reverse input end L7 of the other end and operational amplifier A2
Connection；The noninverting input L8 of the operational amplifier A2 is grounded, the output end L4 and detecting circuit of the operational amplifier A2
Output end J4 connection.
A kind of detecting circuit of diode and filter circuit design is utilized in the utility model, and processing module is exported first
Amplitude-modulated wave rectified, obtain required pulsating current, recycle filter circuit to inhibit or the signal for the useless frequency range that decays, disappear
Except the High-frequency Interference waveform generated after inversion, the signal of useful frequency range is transmitted to amplification and rectification circuit.
The amplification and rectification circuit includes amplifying circuit and shaping circuit, the amplifying circuit include resistance R8, resistance R9,
The output end J6 connection of capacitor C5, capacitor C6 and triode T, the one end the capacitor C5 and amplifying circuit, the capacitor C5 and electricity
R8 series connection is hindered, the output end of the capacitor C5 is connect with the base stage port L9 of triode T；The emitter port of the triode T
L10 ground connection, the collector port L11 of the triode T are connect with resistance R9, capacitor C6 respectively, the port L12 of the resistance R8
It is connect with the port L13 of resistance R9, the port L13 of the port L12 and resistance R9 of the resistance R8 are defeated with amplifying circuit respectively
Enter J5 is held to connect.
The shaping circuit includes resistance R10, resistance R11, resistance R12, resistance R13, resistance R14, transistor VT1 and crystalline substance
Body pipe VT2, the shaping circuit input terminal J7 are connect with resistance R10, resistance R11 respectively, the resistance R10 output end and crystal
The collector port L14 connection of pipe VT1；The resistance R11 output end collector port with resistance R12, transistor VT2 respectively
L15 connection, the resistance R12 are connect with the base stage port L16 of transistor VT1, and the resistance R12 connects with resistance R13, described
Resistance R13 other end ground connection；The emitter port L17 of the transistor VT1, transistor VT2 emitter port L18 respectively with
Resistance R14 connection, the resistance R14 other end ground connection, the base stage port of the transistor VT2 and the output end J8 of shaping circuit
Connection.
Amplifying circuit and shaping circuit are devised in the utility model, wherein the resistance R8 in amplifying circuit is amplifying circuit
Suitable quiescent point is provided, the collector current of amplification can be converted to the output voltage of triode T, capacitor by resistance R9
C5 can isolate direct current and the AC signal of input smoothly allowed to pass through, and capacitor C6 can isolate direct current and smoothly allow amplified friendship
Stream signal smoothly exports, and triode T then plays the role of an energy hole big with small control, former after amplifying circuit
This signal is enhanced rapidly, effectively practical.
The utility model also uses transistor VT1, transistor VT2 devises a kind of shaping circuit, puts through amplifying circuit
After big signal input shaper circuit, converts digital signals into analog signal and be transmitted to output circuit.
The utility model devises a kind of touching device of short distance detection, including first detection module, the second inspection
Module, third detection module, processing module, detecting circuit, amplification and rectification circuit and output circuit are surveyed, when people is close to touching device
When, the electric module of the first detection and third detection module start simultaneously, and not only magnetic field occurs for detection coil and object to be detected surface
Effect, while temperature sensor triggers electric signal, causes the variation of the first oscillating circuit, third oscillating circuit respectively；Work as finger
When touching touching device, the second detection module starting, finger forms coupled capacitor as a traveling electrode and induction electrode,
Carry out the frequency of oscillation of the second oscillating circuit so as to cause the change of input capacitance.
When first detection module, the second detection module, third detection module are by electric signal transmission to processing module, place
Manage module output module issued and instruct, output signal to detecting circuit and carry out detection and filtering, by amplification and rectification circuit into
Output circuit output is transmitted to after row amplification, shaping.
When only any one or both signal passes in first detection module, the second detection module, third detection module
When transporting to processing module, processing module refusal issues instruction, and output module is in close state, invalidating signal.
Circuit structure is simple in the utility model, and signal transmission is quick sensitive, and three kinds of different measurement circuit designs are arrived
In the same touching device, three kinds of different detection circuits are coordinated, the common transmission and detection for carrying out signal,
The precision of detection information is increased, it is effectively practical.
It is obvious to a person skilled in the art that the present invention is not limited to the details of the above exemplary embodiments, and
And without departing substantially from the spirit or essential attributes of the utility model, it can realize that this is practical new in other specific forms
Type.Therefore, in all respects, the present embodiments are to be considered as illustrative and not restrictive, this is practical new
The range of type is indicated by the appended claims rather than the foregoing description, it is intended that containing for the equivalent requirements of the claims will be fallen in
All changes in justice and range are embraced therein.It should not treat any reference in the claims as limiting
Related claim.
Claims (6)
1. a kind of touching device of short distance detection, it is characterised in that: the touching device includes the detection mould being sequentially connected electrically
Block, processing module and output module, the detection module include first detection module, the second detection module and third detection mould
Block, the first detection module include induction electrode and the first oscillating circuit, and the induction electrode is electrically connected with the first oscillating circuit
It connects, second detection module includes detection coil and the second oscillating circuit, and the detection coil is electrically connected with the second oscillating circuit
It connects, the third detection module includes temperature sensor and third oscillating circuit, the temperature sensor and third oscillating circuit
Electrical connection；The output module includes detecting circuit, amplification and rectification circuit and output circuit, first oscillating circuit, second
Oscillating circuit, third oscillating circuit are electrically connected with processing module respectively, the processing module, detecting circuit, amplification and rectification circuit
It is sequentially connected electrically with output circuit.
2. a kind of touching device of short distance detection according to claim 1, it is characterised in that: the temperature sensor packet
Optical filter (1), pipe cap (2), tube socket (8) and pin (9) are included, the optical filter (1) is mounted on pipe cap (2), the pipe cap (2)
It is mounted on tube socket (8), is provided with the first connector (3) on the pipe cap (2), be provided with the second connection on the tube socket (8)
Part (7), the pipe cap (2), tube socket (8) are coupled by the first connector (3) and the second connector (7), the pin (9)
Upper end is fixedly mounted across pipe cap (2), and sensing element (4), high value resistor (5) are provided between the pipe cap (2) and tube socket (8)
With field effect transistor (6), the sensing element (4) is mounted on pipe cap (2) bottom surface, and the high value resistor (5) and field-effect are brilliant
Body pipe (6) is installed on tube socket (8).
3. a kind of touching device of short distance detection according to claim 2, it is characterised in that: the first oscillation electricity
Road, the second oscillating circuit are identical with the circuit structure of third oscillating circuit, and first oscillating circuit includes resistance R1, resistance
R2, resistance R3, resistance R4, operational amplifier A1, capacitor C1 and capacitor C2, the one end the resistance R1 and oscillating circuit input terminal J1
Connection, the other end connect with resistance R2, the inverting input terminal L1 of the operational amplifier A1 be connected to resistance R1, resistance R2 it
Between, the non-inverting input terminal L2 of the operational amplifier A1 is connect with capacitor C1, resistance R4 and capacitor C2 respectively, the capacitor C1 with
Resistance R3 connection, is grounded after the capacitor C2 is in parallel with resistance R4, the output end L3 of the operational amplifier A1 respectively with resistance
R2, resistance R3 connection, the input terminal J2 connection of the output end L3 and oscillating circuit of the operational amplifier A1.
4. a kind of touching device of short distance detection according to claim 3, it is characterised in that: the detecting circuit includes
Diode D1 and filter circuit, the filter circuit include that resistance R5, resistance R6, resistance R7, capacitor C3, capacitor C4 and operation are put
Big device A2, the one end the diode D1 are connect with detecting circuit input terminal J3, and the diode D1 connects with resistance R5, the electricity
Resistance R5 is connect with the input terminal L4 of capacitor C3；The output end L6 of the output end L5 and operational amplifier A2 of the capacitor C3 are connect,
The input terminal of the resistance R6 is connect with the input terminal L4 of capacitor C3, output end ground connection；The resistance R7 input terminal and capacitor C3
Output end L5 connection, output end connect with the inverting input terminal L7 of operational amplifier A2；The capacitor C4 input terminal and capacitor
The input terminal L4 connection of C3, the other end are connect with the reverse input end L7 of operational amplifier A2；The operational amplifier A2's is same
It is grounded to input terminal L8, the output end J4 connection of the output end L4 and detecting circuit of the operational amplifier A2.
5. a kind of touching device of short distance detection according to claim 4, it is characterised in that: the amplification and rectification circuit
Including amplifying circuit and shaping circuit, the amplifying circuit includes resistance R8, resistance R9, capacitor C5, capacitor C6 and triode T,
The output end J6 connection of the one end the capacitor C5 and amplifying circuit, the capacitor C5 connect with resistance R8, and the capacitor C5's is defeated
Outlet is connect with the base stage port L9 of triode T；The emitter port L10 of the triode T is grounded, the collection of the triode T
Electrode ports L11 is connect with resistance R9, capacitor C6 respectively, and the port L13 of the port L12 and resistance R9 of the resistance R8 are connect,
The port L13 of the port L12 and resistance R9 of the resistance R8 are connect with the input terminal J5 of amplifying circuit respectively.
6. a kind of touching device of short distance detection according to claim 5, it is characterised in that: the shaping circuit includes
Resistance R10, resistance R11, resistance R12, resistance R13, resistance R14, transistor VT1 and transistor VT2, the shaping circuit input
End J7 is connect with resistance R10, resistance R11 respectively, and the collector port L14 of the resistance R10 output end and transistor VT1 connect
It connects；The resistance R11 output end is connect with the collector port L15 of resistance R12, transistor VT2 respectively, the resistance R12 with
The base stage port L16 connection of transistor VT1, the resistance R12 connect with resistance R13, the resistance R13 other end ground connection；Institute
The emitter port L18 of the emitter port L17, transistor VT2 that state transistor VT1 are connect with resistance R14 respectively, the resistance
R14 other end ground connection, the base stage port of the transistor VT2 and the output end J8 connection of shaping circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821089963.3U CN208688549U (en) | 2018-07-10 | 2018-07-10 | A kind of touching device of short distance detection |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821089963.3U CN208688549U (en) | 2018-07-10 | 2018-07-10 | A kind of touching device of short distance detection |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN208688549U true CN208688549U (en) | 2019-04-02 |
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ID=65880553
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201821089963.3U Expired - Fee Related CN208688549U (en) | 2018-07-10 | 2018-07-10 | A kind of touching device of short distance detection |
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| Country | Link |
|---|---|
| CN (1) | CN208688549U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112798651A (en) * | 2019-11-13 | 2021-05-14 | 中国科学院化学研究所 | Passive humidity detection system based on electromagnetic induction |
-
2018
- 2018-07-10 CN CN201821089963.3U patent/CN208688549U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112798651A (en) * | 2019-11-13 | 2021-05-14 | 中国科学院化学研究所 | Passive humidity detection system based on electromagnetic induction |
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