CN109490767A - Gas lamp switching device short-circuit detecting circuit, method, apparatus and storage medium - Google Patents
Gas lamp switching device short-circuit detecting circuit, method, apparatus and storage medium Download PDFInfo
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- CN109490767A CN109490767A CN201811308450.1A CN201811308450A CN109490767A CN 109490767 A CN109490767 A CN 109490767A CN 201811308450 A CN201811308450 A CN 201811308450A CN 109490767 A CN109490767 A CN 109490767A
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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
The present invention relates to circuit protection technical fields; disclose a kind of Gas lamp switching device short-circuit detecting circuit, method, apparatus and storage medium; short-circuit detecting suitable for multiple gases lamp switch device; short-circuit detecting circuit includes: detection module; for obtaining the current voltage signal of energy storage device; and for carrying out decompression and isolation processing to the current voltage signal, the voltage signal after being isolated；Processing module is electrically connected with the detection module, for judging whether the switching device is in short-circuit condition according to the voltage signal after isolation；The first electrode of the energy storage device is electrically connected with Gas lamp, and the second electrode of the energy storage device is electrically connected with the switching device that the Gas lamp opens or closes is controlled.
Description
Technical field
The present invention relates to circuit protection technical field more particularly to a kind of Gas lamp switching device short-circuit detecting circuits, side
Method, device and storage medium.
Background technique
Video camera when shooting, can control the time of Gas lamp conducting, to light Gas lamp to expire by switching device
The demand of sufficient video camera light filling.When high current flows through switching device, be easy to cause the short circuit of switching circuit so that Gas lamp without
Method is turned off by switching device, causes Gas lamp brightness is higher to cause light pollution, also waste electric energy, therefore, how detection switch
Whether device is in the state of normal work, is a problem to be solved.
Summary of the invention
The embodiment of the invention provides a kind of Gas lamp switching device short-circuit detecting circuit, method, apparatus and storage medium,
Whether short-circuit condition is in for easier detection gas lamp switch device.
In a first aspect, the embodiment of the invention provides a kind of Gas lamp switching device short-circuit detecting circuits, comprising:
Detection module, for obtaining the current voltage signal of energy storage device, and for the current voltage signal into
Row decompression and isolation processing, the voltage signal after being isolated；
Processing module is electrically connected with the detection module, for being opened described in judgement according to the voltage signal after the isolation
Close whether device is in short-circuit condition；
The first electrode of the energy storage device is electrically connected with Gas lamp, described in the second electrode and control of the energy storage device
The switching device electrical connection that Gas lamp opens or closes.
Optionally, the detection module, further includes:
Pressure unit obtains the first buck signal for the current voltage signal to be depressured according to preset ratio；
Comparing unit is electrically connected with the pressure unit, for by first buck signal and reference voltage signal into
Row compares, and exports first voltage signal according to comparison result, wherein the reference voltage is the minimum electric conduction of comparing unit
Pressure；
Isolated location is electrically connected with comparing unit, for the voltage when receiving first voltage signal, after output isolation
Signal, wherein the first voltage signal is corresponded with the voltage signal after described be isolated.
Optionally, the comparing unit, comprising: transistor or comparator, the first external voltage source.
Optionally, the isolated location, comprising: photoelectrical coupler, the second external voltage source.
Second aspect, the embodiment of the present invention also provide a kind of Gas lamp switching device method for detecting short circuit, comprising:
By detection module obtain energy storage device current voltage signal, and to the current voltage signal carry out decompression and
Isolation processing, the voltage signal after being isolated；
By the processing module being electrically connected with the detection module, according to the voltage signal after the isolation, described in judgement
Whether switching device is in short-circuit condition；
The first electrode of the energy storage device is electrically connected with Gas lamp, described in the second electrode and control of the energy storage device
The switching device electrical connection that Gas lamp opens or closes.
Optionally, the detection module includes pressure unit, comparing unit and isolated location, which comprises
The pressure unit obtains the voltage signal on energy storage device, and the voltage signal is dropped according to preset ratio
Pressure processing obtains the first buck signal, and first buck signal is sent to the comparing unit；
The comparing unit receives first buck signal that the pressure unit is sent, and first decompression is believed
It number is compared with reference voltage signal, and first voltage signal is exported according to comparison result, wherein the reference voltage signal
For the minimum conducting voltage signal of the comparing unit；
The isolated location receives the first voltage signal that the comparing unit is sent, and according to first electricity
Voltage signal after pressing signal output to be isolated.
Optionally, the comparing unit exports the first voltage signal, specifically includes:
If first buck signal is more than or equal to reference voltage signal, comparing unit is in the conductive state, then described the
One voltage signal is equal to zero；
If first buck signal is less than reference voltage signal, comparing unit is in off state, then first electricity
Signal is pressed to be greater than zero.
Optionally, the isolated location exports the voltage signal after the isolation, specifically includes:
If the first voltage signal is greater than zero, the voltage signal after the isolation is low level；
If the first voltage signal is equal to zero, the voltage signal after the isolation is high level.
The third aspect, the embodiment of the invention also provides a kind of short-circuit detecting devices of switching device, including at least one
Processor and at least one processor, wherein the memory is stored with program, when described program is held by the processor
When row, so that the processor is executed such as the step of second aspect the method.
Fourth aspect, the embodiment of the invention also provides a kind of storage medium, the storage medium is stored with computer and refers to
It enables, when the computer instruction is run on computers, so that the step of computer executes the method as described in second aspect.
In the technical solution of the embodiment of the present invention, the current voltage signal of energy storage device is obtained by detection module, and
Decompression and isolation processing carried out to the current voltage signal, voltage signal after being isolated, then by with the detection mould
The processing module of block electrical connection judges whether the switching device is in short-circuit condition according to the voltage signal after the isolation,
The first electrode of the energy storage device is electrically connected with Gas lamp, and the second electrode of the energy storage device is opened with the Gas lamp is controlled
The switching device electrical connection opened or closed.Relatively and in the short-circuit detecting circuit of existing Gas lamp switching device, the present invention is real
The Gas lamp switching device short-circuit detecting circuit for applying the setting of example offer driven independently of switching device and switching device is applicable in
Range is wide, is applicable to the short-circuit detecting of a variety of switching devices, detection circuit is simpler, so that effective solution is existing
Switching device short-circuit detecting scheme complexity and the restricted problem of use scope.
Detailed description of the invention
In order to more clearly explain the embodiment of the invention or the technical proposal in the existing technology, embodiment will be described below
Needed in attached drawing be briefly described, it should be apparent that, the accompanying drawings in the following description is only of the invention some
Embodiment.
Fig. 1 is a kind of application module figure of switching device detection circuit provided in an embodiment of the present invention；
Fig. 2 is detection module structure chart provided in an embodiment of the present invention；
Fig. 3 is detection module circuit diagram provided in an embodiment of the present invention；
Fig. 4 is energy storage device charge and discharge provided in an embodiment of the present invention schematic diagram corresponding with voltage signal level after isolation；
Fig. 5 is a kind of switch short detection device schematic diagram provided in an embodiment of the present invention.
Specific embodiment
In order to make the object, technical scheme and advantages of the embodiment of the invention clearer, below in conjunction with the embodiment of the present invention
In attached drawing, technical solution of the present invention is clearly and completely described, it is clear that described embodiment is skill of the present invention
A part of the embodiment of art scheme, instead of all the embodiments.Based on the embodiment recorded in present specification, this field is general
Logical technical staff every other embodiment obtained without creative efforts, belongs to the technology of the present invention side
The range of case protection.
Part concept involved in the embodiment of the present invention is introduced below.
Gas lamp: being called and do Encapsulated electric arc discharge light source, is to be excited by air seal in blister by electrode discharge
Gas luminescence has stable radiation, and power is big, and the feature that luminous efficiency is high.
IGBT (Insulated Gate Bipolar Transistor, insulated gate bipolar transistor), is (double by BJT
Polar form triode) and MOS (insulating gate type field effect tube) composition compound full-control type voltage driven type power semiconductor, it is simultaneous
There is advantage of both the high input impedance of MOSFET and the low conduction voltage drop of GTR.
In specific practice process, it was found by the inventors of the present invention that whether being used for detection switch device in the prior art
There are mainly two types of the methods of short circuit, one is using with the concatenated detection circuit of switching device come the electric current of sampling switch device,
Judge switch device conductive and shutdown when there is no current to pass through, if switching device still have when off electric current by if conclude it
For short-circuit condition, then control unit is sent a signal to, is disconnected by control unit control switch device with protective switch device, it is this
Control unit can just be sent to by needing will test electric current in detection method and being converted into voltage, and implementation is complex.It is another
Kind be the voltage at detection switch device both ends, by between switching device collector and emitter voltage and a reference source voltage compare
Compared with, when being higher than a reference source voltage, the overcurrent protection of trigger switch device driver, protective switch device, this detection method
Be the equal of a kind of overcurrent protection function, need driver cooperation to be just able to achieve, the driver of different types of switching device is not
It is identical, and overcurrent protection cannot be triggered when there are the high current of moment, so that its use scope is restricted.Both detections
Method is excessively complicated or there are certain limitations, is unfavorable for the short-circuit detecting of switching device.For this purpose, invention of the invention
Whether artificial easier detection switch device is in short-circuit condition, devises one and switching device and switching device
The completely self-contained detection scheme of driver.
Based on this, the embodiment of the invention provides a kind of Gas lamp switching device short-circuit detecting circuit, the detection circuit packets
Detection module and processing module are included, the voltage signal obtained from energy storage device is depressured by detection module by pressure unit
And isolation processing, the voltage signal after being isolated, and the voltage signal is sent to processing module, processing module is according to receiving
Isolation after voltage signal, judge whether switching device is in short-circuit condition.It is this independently of switching device and derailing switch
The detection circuit of the setting of part driving, application range is more extensive, can be used for the short-circuit detecting of a variety of switching devices.
In order to illustrate the short-circuit detecting circuit of above-mentioned Gas lamp switching device, below in conjunction with specific embodiment into
Row detailed description:
The short-circuit detecting circuit of Gas lamp switching device in the embodiment of the present invention as shown in Figure 1, include detection module 10,
Processing module 11, Gas lamp power supply 12, Gas lamp driving 13, switching device drive 14, Gas lamp 15, switching device 16, energy storage
Device 17.
Wherein, Gas lamp driving 13 is for generating a high pressure to ionize the gas in Gas lamp pipe, to be formed electrical
Circuit enables Gas lamp 15 to shine；Switching device driving 14 is for being converted to switching device institute for the signal of control unit
The signal of the level signal and driving capability that need, it is ensured that switching device normally closed or disconnection；Switching device 16 is for being closed
Or Gas lamp circuit loop is disconnected, Gas lamp is shone；Processing module 11 is for judging whether switching device is in short
Line state；Detection module 10 is used to obtain the voltage signal at the both ends of energy storage device, and obtains after carrying out decompression and isolation processing
Voltage signal after one isolation.
Energy storage device 17 can be capacitor or other can be used for the device of energy storage, and energy storage device 17 is used to store electric energy,
And electric energy is provided for Gas lamp 15, when being lit due to 15 moment of Gas lamp, need to absorb very big energy to be converted into luminous energy,
If directly absorbing a large amount of energy from the load of Gas lamp prime, prime abnormal electrical power supply may be caused, so needing one
A energy storage device provides energy when being lit moment for Gas lamp.
In embodiments of the present invention, when 11 control switch device drive 14 of processing module disconnects switching device, Gas lamp
It does not work, so at this time without carrying out short-circuit detecting to switching device；When 11 control switch device drive 14 of processing module is closed
When switching device, Gas lamp is in running order, is lit, and just needs to judge that Gas lamp is because switching device is just normally closed at this time
It closes and is lit, or be closed and be lit because short circuit occurs for switching device.
In embodiments of the present invention, switching device 16 can be BJT current mode full-controlled device, N-MOSFET voltage-type is controlled entirely
Device, MCT voltage-type full-controlled device, GTO current mode full-controlled device, IGBT voltage-type full-controlled device etc., in following the description
It is described so that switching device 16 is voltage-type full-controlled device IGBT as an example.
In embodiments of the present invention, since the gas in Gas lamp 15 can just ionize in a high voltage state, thus shape
At electric loop, so that Gas lamp shines, so a Gas lamp driving 13 is needed to convert the alternating current connecting with Gas lamp 15
At high pressure, Gas lamp driving 13 has transformer, for alternating current to be converted into high pressure.In Gas lamp 15 in normal operating conditions
When, the time for needing to be lit is very short, so it is an instantaneous pressure that Gas lamp, which drives the voltage of 13 supply gas lamps 15, once
After Gas lamp 15 is lighted by high pressure, then it will not be further continued for supplying.
Specifically, needing to meet simultaneously two conditions to make Gas lamp 15 shine, first is that 13 supply of Gas lamp driving
15 1 instantaneous pressures of Gas lamp, second is that switching device 16 is closed.The closure of switching device 16 is to pass through switch by control unit
Device drive 14 is come what is realized, and voltage needed for different switching device closures is also different, so needing to drive using switching device
The dynamic voltage for being converted into alternating current switching device can be made to be closed, wherein switching device driving and Gas lamp driving, also have
One transformer can be used in the voltage of closure switch device for the voltage of access to be converted into, while also act as high pressure
With the effect of mains isolation, entire circuit is prevented to be burned.
Fig. 2 shows the structure charts of detection module 10 in the embodiment of the present invention to illustrate only and this hair for convenience of explanation
The relevant part of bright embodiment, is specifically described as follows:
As shown in Fig. 2, being electrically connected between detection module 10 and processing module 11 in the embodiment of the present invention, detection module 10 is wrapped
It includes: pressure unit 101, comparing unit 102, isolated location 103.The electricity of the input terminal access energy storage device 17 of pressure unit 101
Pressure, the output end of pressure unit 101 are connect with the input terminal of comparing unit 102, the output end and isolated location of comparing unit 102
103 input terminal connection, the output end of isolated location 103 connect processing module.
Pressure unit 101 obtains voltage signal from energy storage device 17, and carries out to the voltage of acquisition according to preset ratio
Decompression processing, obtains the first buck signal, and the first buck signal of acquisition is sent to comparing unit 102, comparing unit 102
First buck signal is compared with reference voltage signal, according to the result of the comparison sends the first voltage signal of output to
Isolated location 103, the voltage signal (SHORT_DETECT) after the output isolation of isolated location 103 give processing module 11, handle mould
Block 11 judges whether switching device is in short-circuit condition according to the voltage signal after isolation.
As shown in figure 3, in the embodiment of the present invention, pressure unit 101 include resistance R1, resistance R2, resistance R3, resistance R7,
Resistance R8, resistance R9, resistance R10, capacitor C3, comparing unit 102 include transistor Q2, resistance R4, the first external voltage
Source V1, capacitor C1, isolated location 103 include photoelectrical coupler U1, resistance R6, the second external voltage source V2, capacitor C2.
Referring to Fig. 3, after resistance R1, resistance R2, resistance R3, resistance R7 series connection with the first end of resistance R9, capacitor R3 the
The first end connection of one end, resistance R8, the second end of resistance R9 are connect with the second end of the second end of capacitor C3, resistance R10, electricity
The second end of resistance R8 is connect with the first end of resistance R10, and the first end of resistance R1 and the second end of resistance R9 are connected to storage
The both ends of energy device 17.The base stage 1 of transistor Q2 is connect with the first end of resistance R10, the emitter 2 of transistor Q2
It is connect with the second end of the second end of resistance R10, capacitor C1, the collector 3 of transistor Q2 and second end, the electricity of resistance R4
Hold the first end connection of C1, the first end of resistance R4 is connect with the first external voltage source V1, the first pin 1 of photoelectrical coupler U1
It is connect with the first end of capacitor C1, the second pin 2 of photoelectrical coupler U1 is connect with the second end of capacitor C1, photoelectrical coupler U1
Third pin 3 connect with the second end of capacitor C2 after be grounded, the first end of the 4 capacitor C1 of the 4th pin of photoelectrical coupler U1,
Second end, the processing module 11 of resistance R6 connects, and the first end of resistance R6 is connect with the second external voltage source V2.
It should be noted that since just Gas lamp shines under high pressure, so its operating voltage value is a high pressure, in order to
Detection circuit is worked normally, so setting resistance R1, R2, R3 and R7 connect to achieve the effect that partial pressure, is used herein as four
Resistance series connection is just for the sake of facilitating explanation, and not representing can only be divided using four resistance, and the use number of resistance is not
It is restricted, it, can also if single resistor satisfied power and pressure-resistant condition as long as meeting power requirement, partial pressure effect can be reached
Use single resistance.
In embodiments of the present invention, the transistor Q2 in comparing unit 102 can be NPN type transistor,
It can be and act on similar metal-oxide-semiconductor with NPN type transistor, hereinafter using transistor Q2 as NPN type transistor
For made a concrete analysis of.Comparing unit 102 is mainly used for the first buck signal transmitted according to pressure unit 101 and NPN type
The reference voltage signal comparison result of transistor exports first voltage signal to isolated location 103.
When transistor Q2 cannot be connected in the first buck signal that pressure unit 101 transmits, i.e. transistor Q2
In off state, voltage of the first external voltage source V1 after resistance R4 partial pressure is to send isolation in comparing unit 102
The first voltage signal of unit 103.When the first buck signal that pressure unit 101 transmits can be such that transistor Q2 is connected,
After transistor Q2 enters saturation state, collector can be regarded as one with the voltage drop very little between emitter
The switch of closure, at this point, the collector of transistor Q2 is equivalent to a conducting wire with emitter in comparing unit 102, so,
The first voltage signal that comparing unit 102 sends isolated location to is 0V.
In specific practice process, comparing unit 102 is also possible to this logical device of comparator, using comparator
The first buck signal transmitted to pressure unit 101 is analyzed and processed.For example, will be obtained from pressure unit 101 first
Buck signal connects at the "+" end of comparator, by under preset switching device normal operating conditions 17 both ends of energy storage device it is minimum
Voltage value connects at the "-" end of comparator, is compared, when the first buck signal obtained from pressure unit 101 is greater than energy storage
When the minimum voltage value at 17 both ends of device, the first voltage signal of acquisition is high level, i.e. first voltage signal is greater than 0.When from
When the first buck signal obtained in pressure unit 101 is less than the minimum voltage value at 17 both ends of energy storage device, the first electricity of acquisition
Pressure signal is low level, i.e. first voltage signal is equal to 0.
In embodiments of the present invention, when the first voltage signal 103 that comparing unit 102 sends isolated location to is outside first
When connecing voltage of the voltage source V1 after resistance R4 partial pressure, the pin 1 and pin 2 of photoelectrical coupler U1 is connected, in isolated location
Light-Emitting Diode shines, so that phototriode is connected, at this point, photoelectrical coupler U1 is in the conductive state, and it can be by photoelectric coupling
Pin 3, pin 4 and the phototriode of device U1 regards a conducting wire as, since the pin 3 of photoelectrical coupler U1 is grounded, so, warp
The pin 4 for the photoelectrical coupler U1 that united and pin 3 are also grounded by the external voltage source V2 after R6 partial pressure, therefore, in this feelings
It is 0V that isolated location 103, which sends the pressure signal of processing mould 11 to, under condition, i.e. voltage signal after the isolation of the acquisition of processing module 11
Low level.
When comparing unit 102 send to isolated location first voltage signal 103 be 0V when, due to transistor Q2 this
When be equivalent to a switch, so the pin 1 and pin 2 that are connected in photoelectrical coupler U1 with Light-Emitting Diode be equivalent to it is external
A piece conducting wire, light emitting diode are short-circuited, and cannot be switched on, so light emitting diode does not shine at this time, and then photoelectrical coupler
Photosensitive triode in U1 will not be switched on, and therefore, photoelectrical coupler U1 is in the state that do not turn in this case, and isolation is single
The voltage signal that member 103 sends processing mould 11 to is voltage of the second external voltage source V2 after resistance R6 partial pressure, so, processing
Voltage signal after the isolation that module 11 obtains is high level.
In embodiments of the present invention, referring to fig. 4, when the voltage value at 17 both ends of energy storage device is in LAMP+ and first voltage threshold
When between value VH, switching device 16 is just worked normally, and the voltage at 17 both ends of energy storage device is by obtaining after detection module 10 at this time
Isolation after voltage be high level；When the voltage at 17 both ends of energy storage device is less than second voltage threshold value VL, switching device 16
In short-circuit condition, the voltage at 17 both ends of energy storage device is by the way that after detection module 10, the voltage after obtained isolation is low at this time
Level.
Wherein, LAMP+ refers to Gas lamp 15 and switching device 16 in normal operating conditions, and the maximum of energy storage device 17 is electric
Pressure value, first voltage threshold value VH are to limit the maximum turn-on time of switching device 16 with preparatory under 15 normal operating conditions of Gas lamp
Afterwards, the minimum voltage value of energy storage device 17, second voltage threshold value VL are to limit derailing switch with preparatory under 15 short-circuit condition of Gas lamp
After the maximum turn-on time of part 16, the maximum voltage value of energy storage device 17, VH is greater than VL.
When the voltage value of energy storage device 17 is between first voltage threshold value VH and second voltage threshold value VL, crystal three-level
Pipe Q2 is still in the conductive state, but the voltage value of energy storage device 17 (is only more than or equal to first voltage by error detection in order to prevent
When threshold value VH, regards as switching device 16 and be in normal operating conditions, when ignoring switching device normal work, energy storage device 17
Voltage value is in the case where first voltage threshold value VH and second voltage threshold value VL), it will usually limit the maximum conducting of switching device 16
Time, to ensure that transistor Q2 is in the conductive state always in maximum turn-on time, i.e. the electricity in energy storage device 17
When pressure value is greater than second threshold VL, switching device 16 is in normal operating conditions, and the voltage value of energy storage device 17 is less than or equal to
When second voltage threshold value VL, switching device 16 is just in short-circuit condition.
For example, it is assumed that first voltage threshold value VH is 60V, second voltage threshold value VL is 50V, when the voltage value of energy storage device 17
When greater than 50V, switching device 16 can be determined all in normal operating conditions；Due to energy storage device 17 continues electric discharge,
The voltage value of energy storage device 17 will will appear the case where less than or equal to 50V, at this point it is possible to determine that switching device is in short-circuit shape
State.
So when processing module 11 obtain isolated location 103 transmit isolation after voltage signal after, a letter can be passed through
Single electrical level judging, the voltage signal after detection and isolation is high level or low level, determines the voltage range of energy storage device 17,
And then determine switching device is normal operating conditions or short-circuit condition.
Specifically, when the voltage signal after processing module 11 judges the isolation obtained is low level, according to above
Analytic process, can learn that photoelectrical coupler U1 is in the conductive state, transistor Q2 is in off state, to derive
The voltage of energy storage device 17 out is less than or equal to second voltage threshold value VL, and switching device is in short-circuit condition.Work as processing module
11 judge obtain isolation after voltage signal be high level when, according to analytic process above, it is known that photoelectrical coupler
U1 is in off state, and when transistor Q2 is in the conductive state, the voltage signal after the isolation that processing module 11 obtains is
High level.So when it is high level that module 10, which is depressured with the isolation voltage signal obtained after isolation processing, after testing, thus
The voltage for the energy storage device 17 derived is greater than second voltage threshold value VL switching device 16 and is in the state worked normally.
In embodiments of the present invention, when switching device is in normal operating conditions, if switch device conductive, energy storage device
17 are in discharge regime, if switching device disconnects, energy storage device 17 is in the charging stage, at this point, the minimum work of energy storage device 17
It is not less than VH as voltage, therefore, when energy storage device 17 is discharged to VH, would not continue to discharge, but is started to charge, so place
Voltage signal after managing the isolation that module 11 obtains is high level always.When switching device short circuit, accumulator under discharge regime
Voltage meeting continuous discharge in part 17 is just started to charge to close to 0V, and the voltage of Gas lamp can then be filled from 0V under the charging stage
Electricity to energy storage device 17 storage maximum voltage value, therefore, in switching device short circuit, when energy storage device 17 is discharged to VH simultaneously
It will not switch to charge, and be to continue with to be discharged to approach to 0V and just start to charge later, so, after the isolation that processing module 11 obtains
Voltage signal low level first can be transformed by high level, be finally transformed into high level, referring to fig. 4.
For example, with reference to Fig. 4, it is assumed that the maximum turn-on time under 16 normal operating conditions of switching device is t1 (when electric discharge
Between), charging time t2；When 16 short circuit of switching device, will continue to discharge after the t1 time of discharging, the time for continuing electric discharge is t4,
Charging time is t5, and it is that (t1 to t5 herein is by t3 that second voltage threshold value VH, which is discharged to the time between first voltage threshold value VL,
It is an extremely short time), in the t3 time, the voltage signal after the isolation that processing module 11 obtains still is high level.
It is stored so Gas lamp switching device short-circuit detecting circuit provided in an embodiment of the present invention is obtained by detection module
The current voltage signal of device, then the current voltage signal obtained carry out decompression and isolation processing, after one isolation of final acquisition
Voltage signal, and send the voltage signal after the isolation of acquisition to processing module, processing module believes the voltage after isolation
Number analyzed and determined, determine that it is high level or low level, to know the whether normal charge and discharge of energy storage device, it is final really
Whether that makes switching device is in short-circuit condition.Gas lamp switching device short-circuit detecting circuit provided in an embodiment of the present invention is suitable
It is wide with range, it is applicable to the short-circuit detecting of a variety of switching devices, detection circuit is simpler, efficiently solves existing switch
Shorted devices detection scheme complexity and the restricted problem of use scope.
Based on the same inventive concept, the embodiment of the invention also provides a kind of Gas lamp switching device method for detecting short circuit,
The switching device detection circuit specific implementation of this method application can be found in the description of foregoing circuit embodiment part, repeat place not
It repeats again, this method comprises:
By detection module obtain energy storage device current voltage signal, and to the current voltage signal carry out decompression and
Isolation processing, the voltage signal after being isolated；
By the processing module being electrically connected with the detection module, according to the voltage signal after the isolation, described in judgement
Whether switching device is in short-circuit condition；
The first electrode of the energy storage device is electrically connected with Gas lamp, described in the second electrode and control of the energy storage device
The switching device electrical connection that Gas lamp opens or closes.
Optionally, the detection module includes pressure unit, comparing unit and isolated location, which comprises
The pressure unit obtains the voltage signal on energy storage device, and the voltage signal is dropped according to preset ratio
Pressure processing obtains the first buck signal, and first buck signal is sent to the comparing unit；
The comparing unit receives first buck signal that the pressure unit is sent, and first decompression is believed
It number is compared with reference voltage signal, and first voltage signal is exported according to comparison result, wherein the reference voltage signal
For the minimum conducting voltage signal of the comparing unit；
The isolated location receives the first voltage signal that the comparing unit is sent, and according to first electricity
Voltage signal after pressing signal output isolation.
Optionally, the comparing unit exports the first voltage signal, specifically includes:
If first buck signal is more than or equal to reference voltage signal, comparing unit is in the conductive state, then described the
One voltage signal is equal to zero；
If first buck signal is less than reference voltage signal, comparing unit is in off state, then first electricity
Signal is pressed to be greater than zero.
Optionally, the isolated location exports the letter of the voltage after the isolation, specifically includes:
If the first voltage signal is greater than zero, the voltage signal after the isolation is low level；
If the first voltage signal is equal to zero, the voltage signal after the isolation is high level.
Based on the same inventive concept, the embodiment of the invention also provides a kind of short-circuit detecting devices of switching device, such as Fig. 5
It is shown, including at least one processor 20 and at least one processor 21, wherein the memory 21 is stored with program, when
When described program is executed by the processor 20, so that the processor 20 executes the short circuit inspection of switching device as stated above
The step of survey method.
Based on the same inventive concept, the embodiment of the invention also provides a kind of storage medium, the storage medium is stored with
Computer instruction, when the computer instruction is run on computers, so that computer executes derailing switch as stated above
The step of method for detecting short circuit of part.
It should be understood by those skilled in the art that, the embodiment of the present invention can provide as method, system or computer program
Product.Therefore, complete hardware embodiment, complete software embodiment or reality combining software and hardware aspects can be used in the present invention
Apply the form of example.Moreover, it wherein includes the computer of computer usable program code that the present invention, which can be used in one or more,
The shape for the computer program product implemented in usable storage medium (including but not limited to magnetic disk storage and optical memory etc.)
Formula.
The present invention be referring to according to the method for the embodiment of the present invention, the process of equipment (system) and computer program product
Figure and/or block diagram describe.It should be understood that every one stream in flowchart and/or the block diagram can be realized by computer program instructions
The combination of process and/or box in journey and/or box and flowchart and/or the block diagram.It can provide these computer programs
Instruct the processor of general purpose computer, special purpose computer, Embedded Processor or other programmable data processing devices to produce
A raw machine, so that being generated by the instruction that computer or the processor of other programmable data processing devices execute for real
The device for the function of being specified in present one or more flows of the flowchart and/or one or more blocks of the block diagram.
These computer program instructions, which may also be stored in, is able to guide computer or other programmable data processing devices with spy
Determine in the computer-readable memory that mode works, so that it includes referring to that instruction stored in the computer readable memory, which generates,
Enable the manufacture of device, the command device realize in one box of one or more flows of the flowchart and/or block diagram or
The function of being specified in multiple boxes.
These computer program instructions also can be loaded onto a computer or other programmable data processing device, so that counting
Series of operation steps are executed on calculation machine or other programmable devices to generate computer implemented processing, thus in computer or
The instruction executed on other programmable devices is provided for realizing in one or more flows of the flowchart and/or block diagram one
The step of function of being specified in a box or multiple boxes.
Obviously, various changes and modifications can be made to the invention without departing from essence of the invention by those skilled in the art
Mind and range.In this way, if these modifications and changes of the present invention belongs to the range of the claims in the present invention and its equivalent technologies
Within, then the present invention is also intended to include these modifications and variations.
Claims (10)
1. a kind of Gas lamp switching device short-circuit detecting circuit characterized by comprising
Detection module, for obtaining the current voltage signal of energy storage device, and for being dropped to the current voltage signal
Pressure and isolation processing, the voltage signal after being isolated；
Processing module is electrically connected with the detection module, for judging the derailing switch according to the voltage signal after the isolation
Whether part is in short-circuit condition；
The first electrode of the energy storage device is electrically connected with Gas lamp, the second electrode and the control gas of the energy storage device
The switching device electrical connection that lamp opens or closes.
2. circuit as described in claim 1, which is characterized in that the detection module, further includes:
Pressure unit obtains the first buck signal for the current voltage signal to be depressured according to preset ratio；
Comparing unit is electrically connected with the pressure unit, for comparing first buck signal with reference voltage signal
Compared with according to comparison result output first voltage signal, wherein the reference voltage is the minimum conducting voltage of comparing unit；
Isolated location is electrically connected with comparing unit, for the voltage letter when receiving first voltage signal, after output isolation
Number, wherein the first voltage signal is corresponded with the voltage signal after described be isolated.
3. circuit as claimed in claim 2, which is characterized in that the comparing unit, comprising: transistor or comparator,
First external voltage source.
4. circuit as claimed in claim 2, which is characterized in that the isolated location, comprising: photoelectrical coupler, second external
Voltage source.
5. a kind of Gas lamp switching device method for detecting short circuit, special applied to the short-circuit detecting circuit of Gas lamp switching device
Sign is that the circuit includes detection module and processing module, which comprises
The current voltage signal of energy storage device is obtained by detection module, and the current voltage signal is depressured and is isolated
Processing, the voltage signal after being isolated；
The switch is judged according to the voltage signal after the isolation by the processing module being electrically connected with the detection module
Whether device is in short-circuit condition；
The first electrode of the energy storage device is electrically connected with Gas lamp, the second electrode and the control gas of the energy storage device
The switching device electrical connection that lamp opens or closes.
6. method as claimed in claim 5, which is characterized in that the detection module include pressure unit, comparing unit and every
From unit, which comprises
The pressure unit obtains the voltage signal on energy storage device, and the voltage signal is carried out at decompression according to preset ratio
Reason obtains the first buck signal, and first buck signal is sent to the comparing unit；
The comparing unit receives first buck signal that the pressure unit is sent, will first buck signal and
Reference voltage signal is compared, and exports first voltage signal according to comparison result, wherein the reference voltage signal is institute
State the minimum conducting voltage signal of comparing unit；
The isolated location receives the first voltage signal that the comparing unit is sent, and is believed according to the first voltage
Number output isolation after voltage signal.
7. method as claimed in claim 6, which is characterized in that the comparing unit exports the first voltage signal, specifically
Include:
If first buck signal is more than or equal to reference voltage signal, comparing unit is in the conductive state, then first electricity
Signal is pressed to be equal to zero；
If first buck signal is less than reference voltage signal, comparing unit is in off state, then the first voltage letter
Number be greater than zero.
8. method as claimed in claim 6, which is characterized in that the isolated location exports the voltage signal after the isolation,
It specifically includes:
If the first voltage signal is greater than zero, the voltage signal after the isolation is low level；
If the first voltage signal is equal to zero, the voltage signal after the isolation is high level.
9. a kind of switching device short-circuit detecting device, which is characterized in that including at least one processor and at least one storage
Device, wherein the memory is stored with program, when described program is executed by the processor, so that the processor executes
The step of any one of claim 5~8 claim the method.
10. a kind of storage medium, which is characterized in that the storage medium is stored with computer instruction, when the computer instruction
When running on computers, so that the step of computer executes the method as described in any one of claim 5-8 claim.
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| CN201811308450.1A CN109490767B (en) | 2018-11-05 | 2018-11-05 | Gas lamp switching device short circuit detection circuit, method, device and storage medium |
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| CN201811308450.1A CN109490767B (en) | 2018-11-05 | 2018-11-05 | Gas lamp switching device short circuit detection circuit, method, device and storage medium |
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| CN109490767B CN109490767B (en) | 2021-08-27 |
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