CN107179496A - Method and apparatus for the state of detection switch - Google Patents
Method and apparatus for the state of detection switch Download PDFInfo
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- CN107179496A CN107179496A CN201610136531.2A CN201610136531A CN107179496A CN 107179496 A CN107179496 A CN 107179496A CN 201610136531 A CN201610136531 A CN 201610136531A CN 107179496 A CN107179496 A CN 107179496A
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- Prior art keywords
- signal
- switch
- trigger
- state
- response
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/327—Testing of circuit interrupters, switches or circuit-breakers
Abstract
Embodiment of the disclosure is related to the method and apparatus of the state for detection switch.The equipment for being used for the state of detection switch includes：Transformer, the primary side winding of the transformer is electrically coupled to the switch；And trigger, the vice-side winding of the transformer is electrically coupled to, and trigger signal is configured in response to, generate the response signal associated with the on off state of the switch.The equipment also includes controller, is configured to generate the trigger signal, and based on the response signal, generation represents the switching signal of the state of the switch.
Description
Technical field
Embodiment of the disclosure is related to field of power detection, and more particularly relates to detection
The apparatus and method for of the state of switch.
Background technology
In field of power detection, it usually needs determine various switches (particularly wet Node Switch)
State.For example, for breaker, it may be necessary to determine the states such as OF, SD.
Ordinary tap condition detection method and equipment usually using photo-coupler by measured switch with
Isolated between detection circuit.However, this method usually requires what is connected with measured switch
Resistor, to be detected.Resistor would generally produce larger power consumption, and change into
Heat the performance of equipment and operation are adversely affected.In addition, conventional method also has other
Problems, for example, it is unfavorable for the detection (for example, situation of SD states) of wide-voltage range,
The switching signal of interlocking cannot detect that detection speed is slow, low-response simultaneously, consumption ADC ends
Mouthful, consumption cpu resource etc..
The content of the invention
Embodiment of the disclosure aims to provide the equipment solved the above problems at least in part and side
Method.
According to a kind of first aspect of the disclosure setting there is provided state for detection switch
It is standby, including：Transformer, the primary side winding of the transformer is electrically coupled to the switch；With
And trigger, the vice-side winding of the transformer is electrically coupled to, and be configured in response to
Trigger signal, generates the response signal associated with the on off state of the switch.The equipment
Also include controller, be configured to generate the trigger signal, and based on the response signal,
Generation represents the switching signal of the state of the switch.
In certain embodiments, the equipment also includes comparator, is configured to the response
Signal is compared with generating quantification signal with threshold signal；And wherein described controller by with
It is set to based on the quantized signal, generation represents the switching signal of the state of the switch.
In certain embodiments, the equipment also includes threshold generator, is configured to generate institute
State threshold signal.
In certain embodiments, the threshold generator is configured so that the threshold signal rings
Control signals of the Ying Yu from the controller and be adjusted.
In certain embodiments, the controller is further configured to：Within a predetermined period of time,
The quantized signal is received from the comparator according to predetermined time interval, to generate digital letter
Number；Each value in the data signal is added up, to generate count value；And by institute
State count value to be compared with threshold value, represented with generating described in the on off state of the switch
Switching signal.
In certain embodiments, the transformer includes pulse transformer.
In certain embodiments, the trigger include trigger switch, the trigger switch by with
It is set to and is closed in response to the trigger signal, generates the response signal.
In certain embodiments, the controller includes micro controller unit.
In certain embodiments, the trigger signal includes pulse-width signal.
According to the second aspect of the disclosure, there is provided a kind of side of the state for detection switch
Method, including：The primary side winding of transformer is electrically coupled to the switch；Trigger is electrically coupled
To the vice-side winding of the transformer；Generate trigger signal；And in response to the trigger signal,
The response signal associated with the on off state of the switch is generated by trigger.Methods described is also
Including：Based on the response signal, generation represents the switching signal of the state of the switch.
Embodiment of the disclosure can reduce power consumption, and it is small to generate heat, it is to avoid the problem of temperature rise.
In addition, some embodiments can also be without using ADC ports, and it is using only GPIO port
Can, detection speed is fast, and the Key dithering time can significantly reduce.In addition, some embodiments are also more
Supernumerary segment saves cpu resource, and some embodiments can carry out multi-way detecting simultaneously, reduces example
Such as the occupancy of the port of micro controller unit (MCU).
Brief description of the drawings
Accompanying drawing described herein is used for providing further understanding of the disclosure, constitutes the application
A part, the schematic description and description of the disclosure is used to explain the disclosure, not structure
Into improper restriction of this disclosure, wherein：
Fig. 1 shows detection device and its application scenarios in accordance with an embodiment of the present disclosure；
Fig. 2 shows the flow of the method for determination on off state in accordance with an embodiment of the present disclosure
Figure；
Fig. 3 shows the circuit diagram of detection device in accordance with an embodiment of the present disclosure；And
Fig. 4 shows the simulation curve of the signal in the detection device of the embodiment shown in Fig. 3；
And
Fig. 5 shows the simulation curve of the signal in the detection device of the embodiment shown in Fig. 3.
Embodiment
Some illustrative embodiments for being shown in below with reference to the accompanying drawings describe the disclosure
Principle and spirit.It should be appreciated that describing these embodiments to make art technology
Personnel better understood when and then realize the disclosure, and not limit the disclosure in any way
Scope.
Fig. 1 shows detection device 10 and its application scenarios in accordance with an embodiment of the present disclosure.
As shown in figure 1, power supply (for example, AC power supplies) is supplied by 2 pairs of loads 1 of breaker
Electricity.Detection device 10 can be connected with the switch in breaker 2, to determine the state of switch,
So as to be detected to states such as OF, SD, SDE.
Conventional resistive partial pressure detection mode is replaced by transformer, power consumption is greatly reduced, and
The caloric value of equipment is reduced, the cost of equipment is reduced, the durability of equipment is added.
In certain embodiments, transformer 3 can be pulse transformer.With conventional transformer phase
Than pulse transformer is more applicable for transient process (also referred to as transient process), believes with response
Number detection it is more compatible.
Detection device 10 includes transformer 3, as shown in two dotted lines, the primary side of transformer 3
Winding can be connected to the switch ends in breaker 2.In addition, detection device 10 also includes
Trigger 4, it is electrically coupled to the vice-side winding of transformer 3.Trigger 4 can be from control
Device 6 receives trigger signal, and generates in response to trigger signal response signal.In some realities
Apply in example, trigger 4 can include trigger switch, and it is closed in response to trigger signal, from
And generate response signal.
Response signal is the transient signal changed over time, and it responds speed and slowdown monitoring switch to be checked
On off state is associated.Therefore, controller 6 can be by changing over time to response signal
Analysis, is on or off to determine the on off state of measured switch.For example, being opened to be measured
Close in the case of being in open state, the change of response signal over time is relatively slow；On the contrary,
In the case where measured switch is in off status, the change of response signal over time is relatively fast
Speed.
In certain embodiments, controller 6 can be micro controller unit (MCU) etc., its
Trigger signal can be generated, trigger signal can be pulsewidth modulation (PWM) signal etc..
In addition, in order to more easily detect response signal and mitigate the resource occupation of controller 5
Response signal, can also be converted into by (for example, reduction CPU operand) from analog quantity
Digital quantity, to generate data signal.Generally, by analogue-to-digital converters (ADC) come
Complete this operation.ADC generally by analog signal is sampled successively, quantified so as to
Generate data signal.Take however, ADC use has passage, Width funtion can not be carried out
The problems such as range detection.
Alternatively, detection device 10 also includes comparator 5, and comparator 5 is by the response signal
It is compared with threshold signal, with generating quantification signal, then, controller 6 is based on the quantization
Signal come determine switch state.Quantized signal is binary signal, i.e., with high and low two letters
Number level.Therefore, response signal is similar to by quantized signal resulting after comparator 5
Step signal.By the analysis to quantized signal, declining for response signal can be more easily determined
Deceleration, so that it is determined that on off state.
Due to avoiding ADC use, take, can not carry out so as to solve ADC channel
The problem of wide-voltage range is detected.
Alternatively, detection device 10 also includes threshold generator 7, is used for comparator for generating
5 threshold signal.Threshold generator 7 can receive the control signal from controller 5, with
The numerical value of threshold signal is adjusted according to control signal.Because the value of threshold signal can pass through control
Device adjustment processed, therefore detection device 10 can preferably be adapted to the detection of various switches.
For preferably detection switch state, further mitigate the resource occupation (example of controller 6
Such as, CPU operand is reduced), in certain embodiments, controller 6 is in the scheduled time
In section, quantized signal is received from comparator 5 according to predetermined time interval, so that by quantized signal
Discretization, generates data signal, for example, the time series of low and high level (is similar to 0 and 1
Time series).Then, controller 6 can to the value of each in data signal (for example,
0 and 1 sequence) added up, to generate count value.Finally, controller 6 will can be counted
Numerical value is compared with threshold value, so as to generate switching signal.
Thus, it is possible to find out, this method realizes the quantizing process of analog signal by comparator,
And the discretization process of quantized signal is then realized by controller, so as to obtain digital letter
Number, complete phase the step of elder generation during this analog-digital conversion with ADC discrete re-quantization
Instead.
In the case where PWM is as trigger signal, predetermined amount of time can be less than an arteries and veins
The appropriate time value rushed in time span, this can be configured according to specific needs.In addition,
Threshold value can also be configured according to specific needs.The setting of these parameters causes quantized signal
Step point be in predetermined amount of time proper range in, otherwise may cause the meter finally given
Numerical value is excessive, or too small, so as to compare with corresponding larger or smaller threshold value so that
Computation complexity and precision all may reductions.
Fig. 2 shows the detailed of the method 200 of determination on off state in accordance with an embodiment of the present disclosure
Thin flow chart.As shown in Fig. 2 this method can be implemented by the controller 6 in Fig. 1.
In some embodiments, this method is implemented by firmware in the controller.
Method 200 after the start at step 201, trigger signal, triggering is generated in step 202
Signal is sent to trigger (for example, trigger 4 in Fig. 1).By in such as Fig. 1
Circuit arrangement, generates quantized signal.In step 203, detection is connected to the port of comparator
State, that is, detect corresponding quantized signal.In the case where controller is MCU, the end
Mouth can be Capture ports.In step 204, the state of the port is determined, for example, being
High level or low level.If low level, then step 205 is advanced to, count value -1,
Otherwise advance to step 206, count value+1.Then, step 207 is advanced to, is judged whether
Predetermined amount of time is reached.If it has not, then return to step 204, between the scheduled time
Counted every continuation.If having reached predetermined amount of time, step 208 is advanced to, judges to count
Whether value is more than predetermined threshold, if it is, judging switch for closure state in step 209.
Otherwise judge switch for off-state in step 210.
It is alternatively possible to save step 205 or save step 206, or it is modified.
For example, in the case where saving step 205, when port status is high level, advancing to step
Rapid 206, when port status is low level, to count value without modification.So also may be used
To set respective threshold, it is compared with final count value.
Further alternatively, dead band can be set, for example, two threshold values are set, wherein first
Threshold value is more than Second Threshold.If count value is more than first threshold, then it is assumed that switch is closure,
If count value is less than Second Threshold, then it is assumed that switch is to disconnect.And if count value is in
Between first threshold and Second Threshold, i.e., in dead band, then it may need further judgement
It just can determine that the state of switch.The benefit of this design is can further to prevent erroneous judgement etc.
Situation.
In certain embodiments, after step 201, predetermined amount of time can be configured,
Predetermined time interval can also be configured, to facilitate subsequent treatment.
Method shown in Fig. 2 is very easy and effective, is capable of the processing procedure of simplify control device, carries
Computational efficiency is handed over, is used for quickly detecting.In addition, this method is due to receiving different at the time of
Signal, therefore, it can while progress multi-way detecting, saves controller (for example, MCU)
Port occupancy.
Fig. 3 shows the detailed circuit diagram of detection device in accordance with an embodiment of the present disclosure.As schemed
Shown in 3, U1 is the switch in breaker, and it can indicate the states such as OF, SD.L2 and
L1 is respectively the primary side winding and vice-side winding of transformer, the leakage inductance of L3 indication transformers.Open
Close the composition trigger such as U3, diode D1, resistor R1 and R4.Switch U3 and receive tactile
Signal, and closed in response to receiving trigger signal.Trigger signal can be PWM
Signal.Switch after U3 closures, just produce response signal, response signal, which is provided to, to be compared
Device U4 reversed input terminal (-).Comparator U4 carries out response signal and threshold signal
Compare, so that generating quantification signal.As shown in figure 3, threshold signal is in the non-of comparator U4
Comparator U2 is supplied at reversed input terminal.Adjustable voltage benchmark U5, resistor R5 and
R6 etc. constitutes threshold generator, for providing threshold signal to comparator U4.Adjustable voltage base
Quasi- U5 can receive control signal from controller, to adjust the threshold signal to be generated.As schemed
Shown, adjustable voltage benchmark U5 can be TL431 type voltage references.
Comparator U4 output may be coupled to controller, and controller can be according to Fig. 2
Method carry out the state of detection switch.
Fig. 4-Fig. 5 shows the simulation result of the circuit shown in Fig. 3, and wherein Fig. 4 is shown out
Response signal, threshold signal and the quantized signal when being in closure state are closed, Fig. 5 is shown out
Close response signal, threshold signal and the quantized signal when being off.These three signals point
Three pins (expression probe) place shown in Fig. 3 is not taken from.In Fig. 4-Fig. 5
In each accompanying drawing, the step signal in upper figure is quantized signal, and it is the ratio of Fig. 3 circuit
Compared with device U4 output.The signal of substantial constant in figure below is threshold signal, and its numerical value exists
Between 4-5V, this is the signal obtained at the non-inverting input of comparator.Wink in figure below
Varying signal is in response to signal, and it is the signal obtained at the vice-side winding of transformer.
Response signal in Fig. 4 is fast-response signal, with shorter die-away time, and Fig. 5
In response signal be slow-response signal, with longer die-away time.Therefore, in fact,
Comparison by die-away time is that can determine the on off state of switch.But, it is generally the case that
Processing for analog signal is typically inconvenient or poorly efficient.Therefore, in order to improve performance,
The resource occupation of controller is reduced, analog signal is converted into by quantized signal, example by comparator
As above the step signal in figure.If being acquired, counting according to the time to quantized signal,
More easily it can be compared with predetermined threshold, so that it is determined that on off state.
In Fig. 4-Fig. 5 example, it is assumed that the predetermined amount of time of controller sampling is 100 microseconds,
The length of whole transverse axis i.e. in figure, and assume that sampling predetermined time interval is 1 microsecond.Can be with
Find out, the quantized signal in Fig. 4 is low level in 1-13 microseconds, and in 13-100
Microseconds are high level.Thus, count value is 87-13=74.Similarly, it can be calculated that
The corresponding count value of quantized signal in Fig. 5 is 19-91=-72.If setting a threshold to 0,
Then easily judge the state of switch.
It will be appreciated by those skilled in the art that the various theorys described with reference to example disclosed herein
Bright property logical block (for example, controller) can use be designed to perform it is described herein
The general processor of function, digital signal processor (DSP), application specific integrated circuit (ASIC),
Field programmable gate array (FPGA) or other programmable logic units, discrete door or
Transistor logic, discrete hardware component or its any combination are realized or performed.One
In individual or multiple exemplary embodiments, described function can with hardware, software, firmware or
It is combined to realize.
There is provided to the description of disclosed exemplary embodiment to enable those skilled in the art
Enough make or using the present invention.Those skilled in the art will be clear that to these exemplary embodiments
Various modifications, and generic principles defined herein can apply to other embodiment and
Without departing from the spirit and scope of the present invention.Therefore, the present invention is not intended to be limited to institute herein
The exemplary embodiment shown, but be endowed and principle disclosed herein and novel feature
Consistent widest range.
Claims (18)
1. a kind of equipment of state for detection switch, including：
Transformer, the primary side winding of the transformer is electrically coupled to the switch；
Trigger, is electrically coupled to the vice-side winding of the transformer, and is configured to respond to
In trigger signal, the response signal associated with the on off state of the switch is generated；And
Controller, is configured to generate the trigger signal, and based on the response signal,
Generation represents the switching signal of the state of the switch.
2. equipment according to claim 1, in addition to comparator, are configured to institute
Response signal is stated to be compared with generating quantification signal with threshold signal；And
Wherein described controller is configured to be based on the quantized signal, and generation represents the switch
State switching signal.
3. equipment according to claim 2, in addition to threshold generator, are configured to
Generate the threshold signal.
4. equipment according to claim 3, wherein the threshold generator is configured to
So that the threshold signal is adjusted in response to the control signal from the controller.
5. equipment according to claim 2, wherein the controller is further configured
Into：
Within a predetermined period of time, described quantify is received from the comparator according to predetermined time interval
Signal, to generate data signal；
Each value in the data signal is added up, to generate count value；And
The count value and threshold value are compared, to generate the switch shape for representing the switch
The switching signal of state.
6. equipment according to claim 1, wherein the transformer includes pulse transforming
Device.
7. equipment according to claim 1, wherein the trigger includes trigger switch,
The trigger switch is configured in response to the trigger signal and closed, to generate the response
Signal.
8. equipment according to claim 1, wherein the controller includes microcontroller
Unit.
9. equipment according to claim 1, wherein the trigger signal is adjusted including pulsewidth
Signal processed.
10. a kind of method of state for detection switch, including：
The primary side winding of transformer is electrically coupled to the switch；
Trigger is electrically coupled to the vice-side winding of the transformer；
Generate trigger signal；
In response to the trigger signal, generated by trigger related to the on off state of the switch
The response signal of connection；And
Based on the response signal, generation represents the switching signal of the state of the switch.
11. method according to claim 10, in addition to：
The response signal and threshold signal are compared with generating quantification signal；And
The response signal is wherein based on, generation represents the switching signal bag of the state of the switch
Include：
Based on the quantized signal, generation represents the switching signal of the state of the switch.
12. method according to claim 11, in addition to：
Generate the threshold signal.
13. method according to claim 12, in addition to：
The threshold signal is adjusted in response to the control signal from the controller.
14. method according to claim 11, wherein based on the quantized signal, it is raw
Switching signal into the state for representing the switch includes：
Within a predetermined period of time, described quantify is received from the comparator according to predetermined time interval
Signal, to generate data signal；
Each value in the data signal is added up, to generate count value；And
The count value and threshold value are compared, to generate the switch shape for representing the switch
The switching signal of state.
15. method according to claim 10, wherein the transformer becomes including pulse
Depressor.
16. method according to claim 10, wherein the trigger is opened including triggering
Close, the trigger switch is configured in response to the trigger signal and closed, it is described to generate
Response signal.
17. method according to claim 10, wherein the controller includes microcontroller
Device unit.
18. method according to claim 10, wherein the trigger signal includes pulsewidth
Modulated signal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610136531.2A CN107179496A (en) | 2016-03-10 | 2016-03-10 | Method and apparatus for the state of detection switch |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610136531.2A CN107179496A (en) | 2016-03-10 | 2016-03-10 | Method and apparatus for the state of detection switch |
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| CN107179496A true CN107179496A (en) | 2017-09-19 |
Family
ID=59830221
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| Application Number | Title | Priority Date | Filing Date |
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| CN201610136531.2A Pending CN107179496A (en) | 2016-03-10 | 2016-03-10 | Method and apparatus for the state of detection switch |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108183634A (en) * | 2018-01-19 | 2018-06-19 | 浙江正泰电器股份有限公司 | Soft starter with by-pass switch error protection |
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| CN203455452U (en) * | 2013-08-06 | 2014-02-26 | 施耐德电器工业公司 | Breaker overload alarm device |
| CN205720567U (en) * | 2016-03-10 | 2016-11-23 | 施耐德电气工业公司 | For detecting the equipment of the state of switch |
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| JPS5590867A (en) * | 1978-12-28 | 1980-07-09 | Fuji Electric Co Ltd | Breaking test circuit |
| CN2410651Y (en) * | 2000-03-10 | 2000-12-13 | 黄永雄 | Detecting inductor for testing opening/closing state of electrical equipment |
| CN201489089U (en) * | 2009-08-25 | 2010-05-26 | 广州粤能电力科技开发有限公司 | Switching value measuring circuit |
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