CN107809232A - Inductive switch device and detection method - Google Patents
Inductive switch device and detection method Download PDFInfo
- Publication number
- CN107809232A CN107809232A CN201610976499.9A CN201610976499A CN107809232A CN 107809232 A CN107809232 A CN 107809232A CN 201610976499 A CN201610976499 A CN 201610976499A CN 107809232 A CN107809232 A CN 107809232A
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- inductor
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- switch
- inductive switch
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- 238000001514 detection method Methods 0.000 title claims abstract description 66
- 230000001939 inductive effect Effects 0.000 title claims abstract description 35
- 238000000034 method Methods 0.000 claims description 11
- 230000005611 electricity Effects 0.000 claims description 5
- 230000000994 depressogenic effect Effects 0.000 claims 1
- 238000007689 inspection Methods 0.000 claims 1
- 230000000737 periodic effect Effects 0.000 claims 1
- 230000004044 response Effects 0.000 abstract description 5
- 238000010586 diagram Methods 0.000 description 9
- 230000009471 action Effects 0.000 description 4
- 230000008878 coupling Effects 0.000 description 3
- 238000010168 coupling process Methods 0.000 description 3
- 238000005859 coupling reaction Methods 0.000 description 3
- 230000005540 biological transmission Effects 0.000 description 2
- 230000008859 change Effects 0.000 description 2
- 238000010276 construction Methods 0.000 description 2
- 230000002093 peripheral effect Effects 0.000 description 2
- 230000008901 benefit Effects 0.000 description 1
- 230000003750 conditioning effect Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000006698 induction Effects 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 230000003071 parasitic effect Effects 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03K—PULSE TECHNIQUE
- H03K17/00—Electronic switching or gating, i.e. not by contact-making and –breaking
- H03K17/94—Electronic switching or gating, i.e. not by contact-making and –breaking characterised by the way in which the control signals are generated
- H03K17/945—Proximity switches
Abstract
An inductive switch device and a detection method. The inductive switch device includes a switch device and a detection circuit. The switch device comprises a switch and a first inductor. The first inductor forms a loop with the switch according to the on or off state of the switch. The detection circuit comprises a second inductor and a detection circuit. The second sensor is coupled to the first sensor, transmits a detection signal to the first sensor, and receives a response signal from the first sensor. The detection circuit receives the response signal, and detects a wave envelope (wave envelope) of the response signal to generate a detection voltage. The invention couples with the first sensor coupled with the switch through the second sensor, and detects the on or off state of the switch according to the wave seal of the response signal responded by the first sensor.
Description
Technical field
The present invention relates to a kind of switching device and its method for detecting, and more particularly to a kind of inductive switch device and its detect
Survey method.
Background technology
In existing technical field, when the state of being turned on or off of switch to be directed to is detected, and need split
Close and power supply be provided, and be connected to switch using transfer wire, by detect the status transmission of power supply learn the conducting of switch or
Off-state.Have to be arranged in identical object with its circuit for detecting consequently, it is possible to switch, and if switching and detecting electricity with it
When road must be respectively set in different objects, among two articles will have transmission power supply status transfer wire and
Cause the inconvenience in the difficulty and user's use of mechanism design.
The content of the invention
The present invention provides a kind of method for detecting of inductive switch device and inductive switch, can be not required to set with switch room
Connecting wire can learn the state that is turned on or off of switch.
The inductive switch device of the present invention includes switching device and circuit for detecting.Switching device then include switch and
First inductor.First inductor coupling switch, the state that is turned on or off according to switch form loop.Circuit for detecting includes the
Two inductors and detecting circuit.Second inductor is coupled with the first inductor, sends detection signal to the first inductor, and
Back-signalling is received by the first inductor.Detecting circuit couples the second inductor to receive back-signalling, detects back-signalling
Ripple seals (wave envelope) to produce detection voltage.
The method for detecting of the inductive switch of the present invention includes：Switch is set mutually to be coupled with the first inductor, and according to switch
Be turned on or off state formed loop；There is provided the second inductor to be coupled with the first inductor, send detection signal to first
Inductor, and back-signalling is received by the first inductor；The ripple of detection back-signalling is sealed to produce detection voltage.
Based on above-mentioned, the present invention provides the first inductor and is coupled to switch, and is sensed using the second inductor coupling first
Device, by sending detection signal to the first inductor by the second inductor, then the response returned by receiving the first inductor is believed
Number, and the ripple for detecting back-signalling is sealed to produce detection voltage.By detecting the size of voltage, the conducting of switch can off-state
It can be obtained, and in the state of not entity contact-making switch, complete the detecting action to switch.
The present invention is coupled by the second inductor with the first sensor for being coupled to switch, and is returned according to the first sensor
The ripple envelope for the back-signalling answered carrys out the state that is turned on or off of detection switch.
For features described above of the invention and advantage can be become apparent, special embodiment below, and coordinate specification attached
Figure is described in detail below.
Brief description of the drawings
Fig. 1 illustrates the schematic diagram of the inductive switch device of one embodiment of the invention.
Fig. 2 illustrates the schematic diagram of the inductive switch device of another embodiment of the present invention.
Fig. 3 illustrates the schematic diagram of another embodiment of the inductive switch device of Fig. 2 embodiments of the present invention.
Fig. 4 illustrates the frequency relation figure of detection voltage and detection signal.
Fig. 5 A- Fig. 5 D illustrate the signal of the inductor of the embodiment of the present invention and multiple embodiments of its peripheral circuit respectively
Figure.
Fig. 6 illustrates the waveform diagram of the back-signalling of one embodiment of the invention.
Fig. 7 illustrates the flow chart of the method for detecting of the inductive switch of one embodiment of the invention.
Wherein, description of reference numerals is as follows：
100、200：Inductive switch device
110、210：Switching device
120、220：Circuit for detecting
SW1：Switch
111、121、Lx：Inductor
TS：Detection signal
RS：Back-signalling
VD、610：Detect voltage
122、221：Detect circuit
2211：Bleeder circuit
CMP：Comparison circuit
C2、C3、C51、C52、C53：Electric capacity
R1、R2、R51、R52：Resistance
D1：Diode
L1、L2：Inductance
d：Distance
230：Cyclical signal generator
GND：With reference to earth terminal
DVD：Voltage is detected after partial pressure
VREF：Reference voltage
VO：Detecting result
410-430：Curve
TA：Time point
S710-S730：The detecting step of inductive switch
Embodiment
Fig. 1 is refer to, Fig. 1 illustrates the schematic diagram of the inductive switch device of one embodiment of the invention.Inductive switch fills
Putting 100 includes switching device 110 and circuit for detecting 120.Switching device 110 includes switch SW1 and inductor 111.Sensing
The coupling switch SW1 of device 111, and to form primary Ioops according to the switch SW1 state that is turned on or off to decide whether.Wherein, at this
In embodiment, when switch SW1 is switched on, inductor 111 and switch SW1 can form loop, and when switch SW1 is disconnected,
It is corresponding cut-off that inductor 111 and switch SW1 form loop.
Circuit for detecting 120 includes inductor 121 and detecting circuit 122.Inductor 121 couples with the phase of detecting circuit 122,
And inductor 121 is coupled with inductor 111 but is not in contact.Detection signal TS can be transmitted to inductor 111 in inductor 121,
And inductor 111 is receiving detection signal TS, detection signal TS can be corresponded to and return back-signalling RS to inductor 121.It is worth
Pay attention to, back-signalling RS according to switch SW1 can be the state that is disconnected or is switched on and different.Wherein, in this reality
Apply in example, when switch SW1 is disconnected, back-signalling RS voltage peak can be substantially equal to first voltage, and when switch
When SW1 is switched on, back-signalling RS voltage peak can be substantially equal to second voltage, wherein, first voltage is more than the second electricity
Pressure.
Detecting circuit 122 receives back-signalling RS, and is examined for back-signalling RS ripple envelope (waveenvelope)
Survey, and produce detection voltage VD.According to above-mentioned explanation it is known that when switching SW1 and being disconnected, detecting circuit 122 can be according to
Sealed according to detection back-signalling RS ripple to obtain the detection voltage VD with opposing high voltage potentials value.Relative, when switch SW1 quilts
During conducting, detecting circuit 122 can be then sealed according to detection back-signalling RS ripple to obtain the detection electricity with relative low voltage value
Press VD.
That is, the magnitude of voltage by detecting voltage VD, can learn the state that is turned on or off for switching SW1.Also,
Under conditions of switch SW1 is not directly contacted with, switching being turned on or off for SW1 can correctly be detected.
Then Fig. 2 is refer to, Fig. 2 illustrates the schematic diagram of the inductive switch device of another embodiment of the present invention.Induction type
Switching device 200 includes switching device 210, circuit for detecting 220 and cyclical signal generator 230.Switching device 210 includes
Switch SW1 and the inductor by inductance L1 construction, circuit for detecting 220 include inductance L2 construction inductor, detecting circuit 221 with
And comparison circuit CMP.Wherein, detecting circuit 221 then includes diode D1, electric capacity C2 and bleeder circuit 2211.
In the present embodiment, inductance L1 and inductance L2 are not in contact, and the distance d between inductance L1 and inductance L2 can be small
In default critical distance.Consequently, it is possible to signal effectively and correctly can be mutually transmitted between inductance L1 and inductance L2.
On in the action details of inductive switch device 200, cyclical signal generator 230 is coupled to inductance L2, production
Give birth to and transmit detection signal TS to inductance L2.Inductance L2 can transmit detection signal TS to inductance L1.Inductance L1 is receiving detecting letter
After number TS, then it can correspond to detection signal TS and send back-signalling to inductance L2.The back-signalling that inductance L2 is received will be transmitted
To detecting circuit 221 with enter traveling wave envelope detection operation.
In detecting circuit 221, diode D1 anode receives back-signalling, and diode D1 negative electrode is coupled to electric capacity
C2, electric capacity C2 are then serially connected in diode D1 negative electrode and with reference between earth terminal GND.Pass through diode D1 and electric capacity C2 work
With the ripple envelope of back-signalling can be detected, and produce detection voltage VD.
It is worth mentioning, in the present embodiment, detecting circuit 221 and including bleeder circuit 2211.Bleeder circuit 2211 wraps
Resistance R1 and R2 are included, detection voltage VD is received and carries out partial pressure to produce the detection voltage DVD after partial pressure.Here, bleeder circuit
2211 circuit member not necessarily.Wherein, when the magnitude of voltage that the ripple for detecting voltage VD seals is too high, bleeder circuit can be passed through
2211 reduce magnitude of voltage.Consequently, it is possible to the subsequent conditioning circuit for receiving detection voltage VD to be handled can need not use height
Pressure-resistant circuit element designs, and can reduce the cost of circuit.
In addition, voltage DVD is detected after partial pressure is transferred into comparison circuit CMP.Comparison circuit CMP separately receives default reference
Voltage VREF, and make detection voltage DVD and reference voltage VREF after partial pressure be compared to produce detecting result VO.Wherein,
When detection voltage DVD is more than reference voltage VREF after partial pressure, detecting result VO can represent to switch SW1 to disconnect, relative, when
When detection voltage DVD is less than reference voltage VREF after partial pressure, detecting result VO can represent to switch SW1 as conducting.
Subsidiary one carries, and in the present embodiment, back-signalling caused by inductance L1 and switch SW1 conducting are with disconnecting shape
The relevance of state and detection signal TS frequency dependence.It is specifically bright, switch the SW1 ripple of back-signalling when being turned on or off
The difference of the magnitude of voltage of envelope can change and change with detection signal TS frequency.Detection voltage VD that Fig. 4 is illustrated be refer to detecing
Survey signal TS frequency relation figure.Wherein, curve 410 represents to detect voltage VD and detection signal TS's when switching SW1 and disconnecting
The relation curve of frequency, curve 420 are represented when the relation for switching the frequency that voltage VD and detection signal TS is detected during SW1 conductings is bent
Line, and curve 430 is then difference of the curve 410 with 420 corresponding magnitude of voltage of curve.
In view of this, the cyclical signal generator 230 in the embodiment of the present invention can make detecting in a time interval
Signal TS frequency is adjusted over a range of frequencies.That is, cyclical signal generator 230 can pass through the side of frequency sweep
Formula produces detection signal TS, and the state of being turned on or off for ensuring to switch SW1 can correctly be differentiated.
Fig. 3 is refer to below, and Fig. 3 illustrates another embodiment of the inductive switch device of Fig. 2 embodiments of the present invention
Schematic diagram.Relative to Fig. 2, the anode of the diode D1 in Fig. 3 embodiments and with reference to more serial capacitance between earth terminal GND
C3.Wherein, when diode D1 anode and with reference to the parasitic capacitance between earth terminal GND can not meet demand when, can by
Diode D1 anode and it is adjusted with reference to the electric capacity C3 that entity is concatenated between earth terminal GND.
It refer to Fig. 5 A- Fig. 5 D, Fig. 5 A- Fig. 5 D and illustrate the more of the inductor of the embodiment of the present invention and its peripheral circuit respectively
The schematic diagram of individual embodiment.In fig. 5, inductance C51 and inductor Lx coupled in parallel can be separately configured, in figure 5b, then can be another
Inductance C52 and inductor Lx coupled in series are configured, and in figure 5 c, resistance R51 and inductor Lx coupled in series can be separately configured,
In Fig. 5 D, then electric capacity C53 and inductor Lx coupled in parallel can be separately configured, and configure resistance R52 and inductor Lx coupled in series.
By Fig. 5 A- Fig. 5 D multiple embodiments it is known that in the embodiment of the present invention, whether switching device and detect
At least one of inductor of slowdown monitoring circuit, the one or more electric capacity and resistance for the different connected modes that can arrange in pairs or groups
To carry out the adjustment of resonant frequency action.Even more noteworthy, Fig. 5 A- Fig. 5 D multiple embodiments are merely example, no
To limit scope of the invention.And inductor Lx (electricity is coordinated by electric capacity, resistance known to the usual the knowledgeable of this area tool
Feel) there are many kinds to carry out the circuit configurations of resonant frequency adjustment, it also all can be applied to the present invention.
Fig. 6 is refer to below, and Fig. 6 illustrates the waveform diagram of the back-signalling of one embodiment of the invention.Wherein, in the time
Before point TA, switch is disconnected, and back-signalling RS peak value is substantially equal to relatively high first voltage, and in time point TA
When, switch is switched on, and back-signalling RS peak value is gradually reduced and is substantially equal to relatively low second voltage.Pass through detection
The action of circuit, detection voltage 610 can correspond to obtained.
Fig. 7 is refer to, Fig. 7 illustrates the flow chart of the method for detecting of the inductive switch of one embodiment of the invention.Wherein, exist
In step S710, switch is mutually coupled with the first inductor, and loop is formed according to the state that is turned on or off of switch.Then,
In step S720, there is provided the second inductor is coupled with the first inductor, sends detection signal to the first inductor, and by the
One inductor receives back-signalling.Furthermore in step S730, the ripple for detecting back-signalling is sealed to produce detection voltage.
Implementation detail on above-mentioned steps is all discussed in detail in foregoing multiple embodiments and embodiment, below
Seldom repeat for this reason.
In summary, the present invention couple by the second inductor with the first sensor for being coupled to switch, and foundation the
The ripple envelope for the back-signalling that one sensor is responded carrys out the state that is turned on or off of detection switch.
Although the present invention is disclosed as above with embodiment, so it is not limited to the present invention, any art
Middle technical staff, without departing from the spirit and scope of the present invention, when can make a little variation and retouching, therefore the protection of the present invention
Scope is worked as to be defined depending on appended claims institute defender.
Claims (14)
1. a kind of inductive switch device, including：
One switching device, including：
One switch；And
One first inductor, the switch is coupled, and primary Ioops are formed with the switch according to the state that is turned on or off of the switch；With
And
One circuit for detecting, including：
One second inductor, be coupled with first inductor, send a detection signal to first inductor, and by this first
Inductor receives a back-signalling；And
One detecting circuit, second inductor is coupled to receive the back-signalling, the ripple for detecting the back-signalling is sealed to produce one
Detect voltage.
2. inductive switch device as claimed in claim 1, wherein when the switch is on, the loop is formed, and the inspection
The ripple that wave circuit detects the back-signalling is sealed to produce the detection voltage equal to a first voltage, when the switch is off, should
Loop is cut off, and the detecting circuit detects the ripple envelope of the back-signalling to produce the detection voltage equal to a second voltage,
Wherein the first voltage is less than the second voltage.
3. inductive switch device as claimed in claim 1, in addition to
One comparison circuit, the detecting circuit is coupled, compare the detection voltage and a default reference voltage to produce a detecting
As a result.
4. inductive switch device as claimed in claim 3, the wherein detecting circuit include：
One diode, its anode receive the back-signalling, and negative electrode produces the detection voltage；And
One electric capacity, the negative electrode and one of the diode is serially connected in reference between earth terminal.
5. inductive switch device as claimed in claim 4, the wherein detecting circuit also include：
One bleeder circuit, the negative electrode of the diode is coupled, partial pressure is carried out for the detection voltage, and the electricity of the detection after partial pressure is provided
It is depressed into the comparison circuit.
6. inductive switch device as claimed in claim 1, in addition to：
One cyclical signal generator, couples the circuit for detecting, there is provided the periodic detection signal.
7. inductive switch device as claimed in claim 6, wherein the cyclical signal generator and in a time interval
It is adjusted over a range of frequencies for the frequency of the detection signal.
8. inductive switch device as claimed in claim 1, the wherein circuit for detecting also include：
One electric capacity, second inductor and one is serially connected in reference between earth terminal.
9. inductive switch device as claimed in claim 1, wherein first inductor are not in contact with second inductor,
And the distance of first inductor and second inductor is less than a default critical distance.
10. inductive switch device as claimed in claim 1, wherein first inductor and second inductor are respectively one
First coil and one second coil.
11. a kind of method for detecting of inductive switch, including：
A switch is mutually coupled with one first inductor, and primary Ioops are formed according to the state that is turned on or off of the switch；
There is provided one second inductor to be coupled with first inductor, send a detection signal to first inductor, and by this
First inductor receives a back-signalling；And
The ripple for detecting the back-signalling is sealed to produce a detection voltage.
12. the method for detecting of inductive switch as claimed in claim 11, wherein also including：
Compare the detection voltage and a default reference voltage to produce a detecting result.
13. the method for detecting of inductive switch as claimed in claim 12, wherein when the detection voltage is more than the reference voltage
When, the detecting result represents that the switch is disconnected, and when the detection voltage is less than the reference voltage, the detecting result represents that this is opened
Close and be switched on.
14. the method for detecting of inductive switch as claimed in claim 12, wherein also including：
The detection signal is produced, and makes the detection signal and the frequency of the detection signal is directed in a time interval in a frequency
In the range of be adjusted.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| TW105129232 | 2016-09-09 | ||
| TW105129232A TWI628916B (en) | 2016-09-09 | 2016-09-09 | Induction switch apparatus and detection method for induction switch thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN107809232A true CN107809232A (en) | 2018-03-16 |
| CN107809232B CN107809232B (en) | 2021-04-27 |
Family
ID=61576434
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610976499.9A Active CN107809232B (en) | 2016-09-09 | 2016-11-07 | Inductive switch device and detection method |
Country Status (2)
| Country | Link |
|---|---|
| CN (1) | CN107809232B (en) |
| TW (1) | TWI628916B (en) |
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| CN2410651Y (en) * | 2000-03-10 | 2000-12-13 | 黄永雄 | Detecting inductor for testing opening/closing state of electrical equipment |
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Also Published As
| Publication number | Publication date |
|---|---|
| TW201810948A (en) | 2018-03-16 |
| TWI628916B (en) | 2018-07-01 |
| CN107809232B (en) | 2021-04-27 |
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