CN206533351U - Detect circuit and construction of switch - Google Patents
Detect circuit and construction of switch Download PDFInfo
- Publication number
- CN206533351U CN206533351U CN201621199561.XU CN201621199561U CN206533351U CN 206533351 U CN206533351 U CN 206533351U CN 201621199561 U CN201621199561 U CN 201621199561U CN 206533351 U CN206533351 U CN 206533351U
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- Prior art keywords
- energy storage
- circuit
- storage coil
- signal
- eddy
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R33/00—Arrangements or instruments for measuring magnetic variables
- G01R33/02—Measuring direction or magnitude of magnetic fields or magnetic flux
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03K—PULSE TECHNIQUE
- H03K2217/00—Indexing scheme related to electronic switching or gating, i.e. not by contact-making or -breaking covered by H03K17/00
- H03K2217/0027—Measuring means of, e.g. currents through or voltages across the switch
Abstract
The utility model provides a kind of construction of switch for detecting circuit and including the detection circuit, and the detection circuit is used to detect the eddy-current loss in energy storage coil, and the detection circuit includes：Oscillating unit, it constitutes oscillating circuit with energy storage coil, and the oscillating circuit is used to produce oscillator signal according to the pumping signal of input；Filter unit, it is used to be filtered the oscillator signal, to obtain filtered signal；Detection unit, it detects according to the filtered signal and whether there is eddy-current loss in the energy storage coil.The detection circuit structure of the application is simple and sensitivity is high, and eddy-current loss can be detected exactly.
Description
Technical field
The utility model is related to field of switches, more particularly to a kind of detection circuit and construction of switch.
Background technology
In industrial environment, switch is a kind of conventional element, and it is used to control being turned on or off for circuit.
Fig. 1 is a kind of schematic diagram of existing construction of switch, wherein, Fig. 1 (A) represents that switch is off, Fig. 1
(B) represent switch it is in the conduction state.As shown in Fig. 1 (A), the construction of switch has switching push button 101, adjusting rod 102
With elastic portion 103, wherein, switching push button 101 is placed in circuit board 104, and the bottom of switching push button 101 is provided with metal connection
Portion's (not shown), elastomeric element 103 is arranged at housing 105, for resetting the position of adjusting rod 102.
As shown in Fig. 1 (A), in the case that user does not press adjusting rod 102, adjusting rod 102 does not press switching push button
Circuit below 101, therefore switching push button 101 is not switched on, and thus, switch is off.As shown in Fig. 1 (B),
In the case of user F pressing adjusting rods 102, the pressing switching push button 101 of adjusting rod 102, the metal of the bottom of switching push button 101
Connecting portion connects the circuit on circuit board, thus, and switch is in an ON state.
It should be noted that the introduction to technical background is intended merely to conveniently carry out clearly the technical solution of the utility model above
Chu, complete explanation, and facilitate the understanding of those skilled in the art and illustrate.Can not be merely because these schemes be in this practicality
New background section is set forth and thinks that above-mentioned technical proposal is known to those skilled in the art.
Utility model content
Inventors herein have recognized that, in the construction of switch shown in Fig. 1, therefore the insertion housing 105 of adjusting rod 102, is being adjusted
Need to set sealing structure between pole 102 and housing 105, add the design difficulty and cost of construction of switch；Also, Fig. 1
Shown construction of switch is because parts are complicated, and small volume is difficult to realize mechanization production, can only manually assembled, and makes
Cause high.
The utility model embodiment provides a kind of construction of switch and detection circuit, according to construction of switch of the present utility model,
The design requirement to each part of construction of switch can be reduced, the requirement to operating personnel's technical ability when assembling is reduced, when shortening assembling
Between, and it is adapted to large-scale machines production, break away from the limitation of human cost.
Circuit is detected there is provided one kind according to first aspect of the present utility model, for detecting that the vortex in energy storage coil is damaged
Consumption, it is characterised in that the detection circuit includes：
Oscillating unit, it constitutes oscillating circuit with energy storage coil, and the oscillating circuit is used for the pumping signal according to input
Produce oscillator signal；
Filter unit, it is used to be filtered the oscillator signal, to obtain filtered signal；And
Detection unit, it detects according to the filtered signal and whether there is eddy-current loss in the energy storage coil.
According to second aspect of the present utility model, wherein, the oscillating unit includes the first electric capacity and the second electricity of series connection
Hold, also, the output oscillator signal from the tie point of first electric capacity and the second electric capacity to the filter unit.
According to the third aspect of the present utility model, wherein, the oscillating unit includes the 3rd electric capacity and the first electricity of series connection
Resistance, also, export the oscillator signal from the energy storage coil and the tie point of the first resistor to the filter unit.
According to fourth aspect of the present utility model, wherein, the filter unit includes having second resistance and the 4th electric capacity
Low-pass filter circuit.
According to the of the present utility model 5th aspect, wherein, the detection circuit also includes：
Amplifying unit, it is used to be amplified the filtered signal, and the signal after amplification is input into detection
Unit.
According to the of the present utility model 6th aspect, wherein, the detection circuit also includes：
Voltage/current conversion unit, it is used to pulse voltage being converted to pulse current, and the pulse current is as described
Pumping signal is input into the oscillating circuit.
According to the of the present utility model 7th aspect, wherein, the detection circuit also includes：
Diode, it is used to prevent the oscillator signal from flowing out along the path opposite with the pumping signal described
Oscillating circuit.
According to eighth aspect of the present utility model, wherein, the detection unit N number of testing result according to 1 or continuously is sentenced
It whether there is eddy-current loss in the disconnected energy storage coil, wherein, N is the integer more than or equal to 2, also, each detection knot
Fruit is corresponding with each described pumping signal of input.
According to the of the present utility model 9th aspect, there is provided a kind of construction of switch, it is characterised in that the construction of switch bag
Include：
Energy storage coil；
Detection circuit as described in either side in above-mentioned first aspect-eighth aspect, it is used to detect the energy storage line
Eddy-current loss in circle；And
Metal parts, the distance of itself and the energy storage coil can change, wherein, in the metal parts and the energy storage
The distance of coil changes and made in the case that the construction of switch is in first state, and the detection circuit output detects described
There is the first detection signal of eddy-current loss in energy storage coil, change in the distance of the metal parts and the energy storage coil and
Make in the case that the construction of switch is in the second state, the detection circuit output is detected and is not present in the energy storage coil
Second detection signal of eddy-current loss.
According to the of the present utility model tenth aspect, wherein, the construction of switch also includes：
Operating portion, it is used to receive external force and drives the metal parts to deform or move, to change the metal parts
With the distance of the energy storage coil.
The beneficial effects of the utility model are：The design requirement reduction of each part, peace in the construction of switch of the present embodiment
Difficulty reduction is filled, and is adapted to large-scale machines production；Also, the detection circuit structure of the application is simple and sensitivity is high, energy
It is enough to detect eddy-current loss exactly.
With reference to explanation hereinafter and accompanying drawing, particular implementation of the present utility model is disclose in detail, this practicality is specified
New principle can be in adopted mode.It should be understood that embodiment of the present utility model in scope not thus by
Limitation.In the range of the spirit and terms of appended claims, embodiment of the present utility model includes many changes, modifications
With it is equivalent.
The feature for describing and/or showing for a kind of embodiment can be in same or similar mode one or more
Used in individual other embodiment, it is combined with feature in other embodiment, or substitute the feature in other embodiment.
It should be emphasized that term "comprises/comprising" refers to the presence of feature, one integral piece, step or component when being used herein, but simultaneously
It is not excluded for the presence or additional of one or more further features, one integral piece, step or component.
Brief description of the drawings
Included accompanying drawing is used for providing being further understood from the utility model embodiment, which constitutes specification
A part, for illustrating embodiment of the present utility model, and comes together with word description to explain principle of the present utility model.It is aobvious
And easy insight, drawings in the following description are only some embodiments of the present utility model, for those of ordinary skill in the art
For, without having to pay creative labor, other accompanying drawings can also be obtained according to these accompanying drawings.In the accompanying drawings：
Fig. 1 (A) is the schematic diagram that a kind of existing construction of switch is off；
Fig. 1 (B) is a kind of existing construction of switch schematic diagram in the conduction state；
Fig. 2 (A) is that the construction of switch of the embodiment of the present application 1 is in a schematic diagram of the second state；
Fig. 2 (B) is that the construction of switch of the embodiment of the present application 1 is in a schematic diagram of first state；
Fig. 3 is a schematic diagram of the detection circuit of the embodiment of the present application 2；
Fig. 4 is another schematic diagram of the detection circuit of the embodiment of the present application 2；
Fig. 5 (A) be the embodiment of the present application 2 energy storage coil in be not present eddy-current loss when oscillating current a waveform
Figure；
Fig. 5 (B) is a waveform of oscillating current when there is eddy-current loss in the energy storage coil of the embodiment of the present application 2
Figure；
Fig. 6 (A) is a waveform of signal Ui when eddy-current loss is not present in the energy storage coil of the embodiment of the present application 2
Figure；
Fig. 6 (B) is an oscillogram of signal Ui when there is eddy-current loss in the energy storage coil of the embodiment of the present application 2；
Fig. 7 is the pumping signal and a schematic diagram of signal Ui corresponding relation of the embodiment of the present application 2；
Fig. 8 is a schematic diagram of the detection circuit of the embodiment of the present application 3.
Embodiment
Referring to the drawings, by following specification, of the present utility model foregoing and further feature will be apparent.Saying
In bright book and accompanying drawing, particular implementation of the present utility model is specifically disclosed, which show wherein can be new using this practicality
The some embodiments of the principle of type, it will thus be appreciated that the utility model is not limited to described embodiment, on the contrary, this reality
With new whole modifications, modification and equivalent including falling within the scope of the appended claims.In addition, in brief description of the drawings
In, assign and being identically numbered for identical constitutive requirements, and the repetitive description thereof will be omitted.
Embodiment 1
The utility model embodiment 1 provides a kind of construction of switch.
Fig. 2 is a schematic diagram of the construction of switch of the present embodiment 1, and shown in such as Fig. 2 (A), construction of switch 200 includes：
Energy storage coil 201, detects circuit (not shown), and metal parts 203.
In the present embodiment, the electric signal of alternation can be flowed through in energy storage coil 201, so as to externally launch the magnetic of alternation
；The distance between metal parts 203 and energy storage coil 201 can change, also, when metal parts 203 and energy storage coil 201
It is closer to the distance when, the magnetic field for the alternation that energy storage coil 201 is launched can produce eddy current signal in metal parts 203, the whirlpool
Stream signal can make the electric signal in energy storage coil 201 accelerate decay, i.e. make to produce eddy-current loss in energy storage coil 201；Detection
Circuit can detect the eddy-current loss in energy storage coil 201.
In the present embodiment, the testing result of detection circuit is related to the state of construction of switch 200, for example, in metal portion
The distance of part 203 and energy storage coil 201 changes and made in the case that construction of switch 200 is in first state, and detection circuit can
Output detects the first detection signal that there is eddy-current loss in energy storage coil 201；In metal parts 203 and energy storage coil 201
Distance change and make construction of switch 200 be in the second state in the case of, the detection circuit, which can be exported, detects energy storage line
The second detection signal of eddy-current loss is not present in circle 201.
According to the present embodiment, switch is judged in an ON state by detecting in energy storage coil with the presence or absence of eddy-current loss
Or off-state, it need not contact, therefore, each part in construction of switch be set between energy storage coil and movable metal parts
Meter requires reduction, installation difficulty reduction, and is adapted to large-scale machines production.
In the present embodiment, the construction of switch 200 that Fig. 2 (A) is shown is in the second state, and second state for example can be with
It is off-state.As shown in Fig. 2 (A), in this second state, the distance of metal parts 203 and energy storage coil 201 is d1,
This is not enough in energy storage coil 201 produce eddy-current loss apart from d1, therefore, and detection circuit can export the second detection signal,
The second detection signal can be used to indicate that construction of switch 200 is in the second state.
The construction of switch 200 that Fig. 2 (B) is shown is in first state, and the first state can for example be to turn on state.Such as
Shown in Fig. 2 (B), in the first state, the distance of metal parts 203 and energy storage coil 201 is d2, wherein, d2 can be with small
In d1, this to produce eddy-current loss in energy storage coil 201 apart from d2, therefore, and detection circuit can export the first detection letter
Number, the first detection signal can be used to indicate that construction of switch 200 is in first state.
The above-mentioned explanation for first state and the second state is citing, and the present embodiment is not limited to this.For example, can be with
Change the control logic based on first detection signal and the second detection signal, so that the first state corresponds to the disconnected of construction of switch
Open state, makes second state correspond to the on-state of the construction of switch.
In the present embodiment, the material of metal parts 203 can be ferromagnetic material, such as iron or non-ferromagnetic material
Material, such as copper.The optional scope of material of the metal parts 203 is wide, therefore, increases design freedom.
In the present embodiment, the shape of metal parts 203 can be sheet, but the present embodiment not limited to this or
Other shapes.
In the present embodiment, metal parts 203 can be deformed, and be changed by deforming between energy storage coil 201
Distance, for example, as Fig. 2 (A) and (B) shown in, metal parts 203 be intermediate projections sheet, can at intermediate projections position
To be pressed, so as to change the distance between the metal parts 203 and energy storage coil；Or, metal parts 203 can also have
Other bending shapes, the bending shape is deformed when by external force, so as to change metal parts 203 and energy storage coil
Distance.
In the present embodiment, metal parts 203 can also be indeformable, but is changed by moving generation displacement and energy storage
The distance between coil 201.
In the present embodiment, as shown in Fig. 2 the construction of switch 200 can also have operating portion 204, the operating portion 204
For receiving external force and driving metal parts 203 to deform or move, with change metal parts 203 and energy storage coil 201 away from
From.For example, the operating portion 204 can be to be shaft-like, and be arranged at the top of metal parts 203, thus, when operating portion 204 by by
Pressure, the operating portion 204 can drive the intermediate projections position distortions of metal parts 203, so as to change metal parts 203 and energy storage line
The distance of circle 201.
In the present embodiment, the construction of switch 200 be able to can be used with flexible part 2041, the elastomeric element 2041
Resetted in making the position of operating portion 204.
In the present embodiment, as shown in Fig. 2 the operating portion 204 and metal parts 203 can be arranged at housing 205,
For example, the surface of the dorsad energy storage coil 201 of housing 205 can have counterbore 2051, also, operating portion 204 and metal parts
203 can be arranged in counterbore 2051, thus, and through hole need not be set in housing 205, also avoid the need for operating portion 204 with
Seal member is set between housing 205, so as to reduce further design difficulty and manufacturing cost.
In the present embodiment, energy storage coil 201 can be arranged at circuit board 206, thus, it is possible to form circuit board
Energy storage coil 201 is formed in the step of 206 wiring, thus it is possible to reduce manufacture and installation difficulty.
According to the construction of switch of the present embodiment, judged by detecting in energy storage coil with the presence or absence of eddy-current loss at switch
It need not be contacted between on-state or off-state, energy storage coil and movable metal parts, therefore, in construction of switch
The design requirement reduction of each part, installation difficulty reduction, and it is adapted to large-scale machines production.
Embodiment 2
In example 2, the detection circuit of embodiment 1 is illustrated.
Fig. 3 is a schematic diagram of the detection circuit of embodiment 2, as shown in figure 3, detection circuit 300 is used to detect energy storage
Eddy-current loss in coil 201, the detection circuit 300 includes：Oscillating unit 301, filter unit 302 and detection unit 303.
In the present embodiment, oscillating unit 301 can constitute oscillating circuit with energy storage coil 201, and the oscillating circuit is used for
Oscillator signal is produced according to the pumping signal of input；Filter unit 302 is used to be filtered the oscillator signal, to be filtered
Signal afterwards；Detection unit 303 detects according to the filtered signal and whether there is eddy-current loss in energy storage coil 201.
The detection circuit structure of the present embodiment is simple and sensitivity is high, and eddy-current loss can be detected exactly, without
The material of metal parts 203 to causing eddy-current loss makes particular/special requirement.
It should be noted that the detection circuit described by the present embodiment 2 can be used not only in the construction of switch of embodiment 1
Detect and whether there is eddy-current loss in energy storage coil 201, can be used in other devices detecting in energy storage coil whether deposit
In eddy-current loss.
In the present embodiment, as shown in figure 3, oscillating unit 301 can include the first electric capacity C1 and the second electric capacity of series connection
C2, also, from the first electric capacity C1 and the second electric capacity C2 tie point to the outputting oscillation signal of filter unit 302, for example, C1=
270 pico farads, C2=270 pico farads.
In the present embodiment, oscillating unit 301 can also have other structures, and Fig. 4 is the detection circuit of the present embodiment
Another schematic diagram, shown in Fig. 4, the detection circuit 300 and differing only in for Fig. 3 replace Fig. 3's with oscillating unit 301a
Oscillating circuit 301.In Fig. 4, oscillating unit 301a includes the 3rd electric capacity C3 and first resistor R1 of series connection, also, from energy storage
Coil 201 and first resistor R1 tie point export the oscillator signal to filter unit 302, for example, C3=470 pico farads, R1=
10 ohm.
In the present embodiment, as shown in figure 3, filter unit 302 can include low-pass filter circuit, the low-pass filter circuit
Can for example have second resistance R2 and the 4th electric capacity C4, for example, R2=47 kilo-ohms of mother, C4=220 pico farads.
In the present embodiment, detection unit 303 can be microprocessor or other circuits.
As shown in figure 3, in the present embodiment, detection circuit 300 can also include amplifying unit 304, the amplifying unit 304
For being amplified to filtered signal, and the signal after amplification is input to detection unit 303, thus, detection unit 303
More sensitive change in signal can be directed to be detected.
As shown in figure 3, in the present embodiment, detection circuit 300 can also include voltage/current conversion unit 305, electricity
Pressure/current conversion unit 305 is used to pulse voltage being converted to pulse current, and the pulse current can be defeated as pumping signal
Enter to oscillating circuit.
As shown in figure 3, in the present embodiment, detection circuit 300 can also include diode 306, diode
306 are used to prevent the oscillator signal from flowing out the oscillating circuit along the path opposite with pumping signal.
As shown in figure 3, in the present embodiment, detection circuit 300 can also include 3rd resistor R3, it can be with the 4th electricity
Hold C4 in parallel, for discharging the 4th electric capacity C4, for example, R3=100 kilohms.
As shown in figure 3, energy storage coil 201 can have internal resistance R0, for example, R0=5 ohm.Although in addition, not having in Fig. 4
Show, but the energy storage coil 201 in Fig. 4 can also have internal resistance R0.
As shown in figure 3, in the present embodiment, the pulse voltage being input in voltage/current conversion unit 305 can be by examining
Survey unit 303 to generate, thereby, it is possible to make circuit structure more simplified.
In the present embodiment, each pumping signal of input can make detection unit 303 produce a corresponding detection
As a result.Detection unit 303 can judge to whether there is eddy-current loss in energy storage coil 201 based on 1 testing result.But,
The present embodiment not limited to this, detection unit 303 can also judge whether deposited in energy storage coil 201 according to continuous N number of testing result
In eddy-current loss, wherein, N is the integer more than or equal to 2, thereby, it is possible to obtain more accurate judged result.
It should be noted that each unit in Fig. 3 and Fig. 4 can also have other structures, the present embodiment is not limited to
Structure described in Fig. 3 and Fig. 4.
Below, the operation principle to Fig. 3 detection circuit is illustrated.
In figure 3, detection unit 303 can be microprocessor, and the pulse voltage V that detection unit 303 is exported is by voltage/electricity
Stream-converting unit 305 is converted to pulse current, and the pulse current is input into by energy storage coil 201 and vibration as pumping signal
The oscillating circuit that unit 301 is constituted, thus forms oscillator signal in oscillating circuit.
Fig. 5 is a schematic diagram of oscillator signal, wherein, Fig. 5 (A) is shaking in the absence of eddy-current loss in energy storage coil
Swing the oscillogram of electric current, Fig. 5 (B) is the oscillogram for the oscillating current that there is eddy-current loss in energy storage coil.
Oscillator signal is output between electric capacity C1 and C2, and the resistance R2 and electric capacity C4 in unit 302 enter after filtering
Row filtering, obtains filtered signal Ui.Fig. 6 is a filtered signal Ui schematic diagram, and Fig. 6 (A) is energy storage coil
In when eddy-current loss is not present signal Ui oscillogram, Fig. 6 (B) is the ripple of signal Ui when there is eddy-current loss in energy storage coil
Shape figure.It can be seen that, during 10~20 microseconds, the attenuation amplitude of signal Ui waveforms has notable difference in (A) and (B).
The amplified units 304 of signal Ui amplify, and pass through impedance matching, are input into detection unit 303, detection unit
303 detect in energy storage coil whether there is eddy-current loss according to the signal of input.
Fig. 7 is a schematic diagram of pumping signal and signal Ui corresponding relation, wherein, AA represents the waveform of pumping signal
Figure, BB is the oscillogram of signal Ui when eddy-current loss being not present in energy storage coil, and CC is when there is eddy-current loss in energy storage coil
Signal Ui oscillogram.In the present embodiment, oscillogram shown in the oscillogram or CC shown in BB is amplified and impedance matching after
It is input into detection unit 303, detection unit 303 can be according only to the testing result to 1 peak position in oscillogram, to sentence
It whether there is eddy-current loss in disconnected energy storage coil, detection unit 303 can also be according to more than 2 in oscillogram continuous peak positions
Testing result, to judge to whether there is eddy-current loss in energy storage coil.
The operation principle of Fig. 4 detection circuit is similar with Fig. 3, and it will not be described for the present embodiment.
Embodiment 3
In embodiment 3, the other structures to the detection circuit of embodiment 1 are illustrated.
Fig. 8 is a schematic diagram of the detection circuit of embodiment 3, as shown in figure 8, detection circuit 800 is used to detect energy storage
Eddy-current loss in coil 201, the detection circuit 800 includes：Oscillating unit 801, filter unit 802, comparing unit 803 and inspection
Survey unit 804.
As shown in figure 8, oscillating unit 801 constitutes oscillating circuit with energy storage coil 201, there is no whirlpool in energy storage coil 201
In the case of stream loss, oscillating circuit is in oscillatory regime, and the oscillator signal from the output of A points is as shown in A-1 oscillogram, vibration
Signal after filtering unit 802 filter after from B points export signal as shown in B-1 waveform, from B points export signal and than
Result after comparing compared with unit 803 is exported from C points, as shown in C-1, and C points output high level, the signal of C points output is input into
Detection unit 804, and be detected as by detection unit 804 in the absence of eddy-current loss.
As shown in figure 8, in the case of having eddy-current loss in energy storage coil 201, the oscillator signal in oscillating circuit declines
Subtract, the signal from the output of A points is as shown in A-2 oscillogram, only including DC bias signal, the signal of A points output is after filtering
The signal that unit 802 is exported from B points after filtering is as shown in B-2 waveform, as low level signal, the signal that is exported from B points and
Result after comparing unit 803 compares is exported from C points, as shown in C-2, C points output low level signal, the signal quilt of C points output
Detection unit 804 is input to, and is detected as the presence of eddy-current loss by detection unit 804.
The utility model is described above in association with specific embodiment, but those skilled in the art should be clear
Chu, these descriptions are all exemplary, are not the limitation to the utility model protection domain.Those skilled in the art can root
Various variants and modifications are made to the utility model according to spirit of the present utility model and principle, these variants and modifications are also in this reality
With in new scope.
Claims (10)
1. one kind detection circuit, for detecting the eddy-current loss in energy storage coil, it is characterised in that the detection circuit includes：
Oscillating unit, it constitutes oscillating circuit with energy storage coil, and the oscillating circuit is used to be produced according to the pumping signal of input
Oscillator signal；
Filter unit, it is used to be filtered the oscillator signal, to obtain filtered signal；And
Detection unit, it detects according to the filtered signal and whether there is eddy-current loss in the energy storage coil.
2. circuit is detected as claimed in claim 1, it is characterised in that
The oscillating unit includes the first electric capacity and the second electric capacity of series connection, also, from first electric capacity and the second electric capacity
Tie point exports the oscillator signal to the filter unit.
3. circuit is detected as claimed in claim 1, it is characterised in that
The oscillating unit include series connection the 3rd electric capacity and first resistor, also, from the energy storage coil and it is described first electricity
The tie point of resistance exports the oscillator signal to the filter unit.
4. circuit is detected as claimed in claim 1, it is characterised in that
The filter unit includes the low-pass filter circuit with second resistance and the 4th electric capacity.
5. circuit is detected as claimed in claim 1, it is characterised in that the detection circuit also includes：
Amplifying unit, it is used to be amplified the filtered signal, and the signal after amplification is input into the detection
Unit.
6. circuit is detected as claimed in claim 1, it is characterised in that the detection circuit also includes：
Voltage/current conversion unit, it is used to pulse voltage being converted to pulse current, and the pulse current is used as the excitation
Signal is input into the oscillating circuit.
7. circuit is detected as claimed in claim 1, it is characterised in that the detection circuit also includes：
Diode, it is used to prevent the oscillator signal from flowing out the vibration along the path opposite with the pumping signal
Circuit.
8. circuit is detected as claimed in claim 1, it is characterised in that
The detection unit N number of testing result according to 1 or continuously, judges to whether there is eddy-current loss in the energy storage coil,
Wherein, N is the integer more than or equal to 2, also, each testing result is corresponding with each the described pumping signal inputted.
9. a kind of construction of switch, it is characterised in that the construction of switch includes：
Energy storage coil；
Detection circuit as any one of claim 1-8, it is used to detect the eddy-current loss in the energy storage coil；With
And
Metal parts, the distance of itself and the energy storage coil can change,
Wherein, the distance in the metal parts and the energy storage coil changes and the construction of switch is in first state
In the case of, the detection circuit output detects the first detection signal that there is eddy-current loss in the energy storage coil,
The situation for changing in the distance of the metal parts and the energy storage coil and making the construction of switch be in the second state
Under, the detection circuit output detects the second detection signal in the absence of eddy-current loss in the energy storage coil.
10. construction of switch as claimed in claim 9, it is characterised in that the construction of switch also includes：
Operating portion, it is used to receive external force and drives the metal parts to deform or move, to change the metal parts and institute
State the distance of energy storage coil.
Priority Applications (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621199561.XU CN206533351U (en) | 2016-11-07 | 2016-11-07 | Detect circuit and construction of switch |
| JP2017177307A JP2018077215A (en) | 2016-11-07 | 2017-09-15 | Detection circuit and switch structure |
| DE102017121463.1A DE102017121463A1 (en) | 2016-11-07 | 2017-09-15 | Measuring circuit and switch construction |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621199561.XU CN206533351U (en) | 2016-11-07 | 2016-11-07 | Detect circuit and construction of switch |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206533351U true CN206533351U (en) | 2017-09-29 |
Family
ID=59921570
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201621199561.XU Active CN206533351U (en) | 2016-11-07 | 2016-11-07 | Detect circuit and construction of switch |
Country Status (3)
| Country | Link |
|---|---|
| JP (1) | JP2018077215A (en) |
| CN (1) | CN206533351U (en) |
| DE (1) | DE102017121463A1 (en) |
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| JPS5893045U (en) * | 1981-12-18 | 1983-06-23 | オムロン株式会社 | proximity switch |
| JPS62108148A (en) * | 1985-11-06 | 1987-05-19 | Shigeru Kitagawa | Method and device for detecting quality of metal |
| JPH0519808Y2 (en) * | 1986-12-26 | 1993-05-25 | ||
| US4906926A (en) * | 1988-05-16 | 1990-03-06 | Syron Engineering & Manufacturing Corporation | Proximity sensor for hostile environments |
| JPH0629818A (en) * | 1992-07-10 | 1994-02-04 | Omron Corp | Proximity switch |
| JPH1032480A (en) * | 1996-07-15 | 1998-02-03 | Matsushita Electric Works Ltd | Proximity sensor |
| DE102004034190B4 (en) * | 2004-07-14 | 2011-12-29 | Ifm Electronic Gmbh | Oscillator circuit for a sensor |
| JP2007005208A (en) * | 2005-06-27 | 2007-01-11 | Matsushita Electric Works Ltd | Detecting switch |
-
2016
- 2016-11-07 CN CN201621199561.XU patent/CN206533351U/en active Active
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2017
- 2017-09-15 JP JP2017177307A patent/JP2018077215A/en active Pending
- 2017-09-15 DE DE102017121463.1A patent/DE102017121463A1/en active Pending
Also Published As
| Publication number | Publication date |
|---|---|
| JP2018077215A (en) | 2018-05-17 |
| DE102017121463A1 (en) | 2018-05-09 |
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