CN109946549A - The detection system of arc generator - Google Patents
The detection system of arc generator Download PDFInfo
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Abstract
The invention discloses a kind of detection systems of arc generator, including being located on firewire and the current detection circuit for sensed current signal, the zero cross detection circuit for detecting voltage over zero, the trip circuit for controlling buckle releaser, carrying out for analog-to-digital conversion and to the digital signal obtained after analog-to-digital conversion the MCU of data processing, zero cross detection circuit is connect with zero curve, firewire respectively, and zero cross detection circuit, trip circuit, power circuit are connect with MCU respectively；The arc generator that the present invention is formed using current detection circuit, zero cross detection circuit, trip circuit, MCU, power circuit, improves the accuracy and reliability of fault electric arc detection, ensure that the safety of system operation；The detection system of the arc generator has many advantages, such as strong antijamming capability, operation stability are high, detection is accurate and reliable, operational process is safe and cost is relatively low.
Description
Technical field
The present invention relates to a kind of arc generator more particularly to a kind of detection systems of arc generator.
Background technique
Electric arc is that electric current passes through moment spark caused by dielectric.Since electric arc has electric current very little, duration
It is short and the characteristics of can be frequently occurred if there is breakdown point, when an arc occurs, huge heat can be discharged in a short time,
The combustible for surrounding of easily igniting forms fire.Therefore, fault electric arc has become one of the main reason for causing electrical fire,
The security of the lives and property of broad masses of the people is seriously endangered.
Currently, the detection system of existing arc generator is primarily present following disadvantage: first is that existing arc-detection is logical
Power circuit electric current is detected frequently with current transformer: when an arc occurs, comprising a large amount of in power circuit electric current
High-frequency signal determines whether the electric arc that breaks down by the analysis to high-frequency signal amplitude and quantity；And existing electric arc
The generally existing disadvantage for judging whether that the condition for electric arc occur is single and higher to circuit requirement and poor accuracy of detection system,
The problem of being influenced by external interference signal and system detection is caused to be judged by accident is made it easy to, to affect system detection
Accuracy and functional reliability；Second is that since detection system and its circuit design are unreasonable, so that there are one to the judgement of electric arc
Fixed deviation and cannot sufficiently identify the electric arc that circuit occurs, greatly reduce circuit safety；Third is that buckle releaser and its de-
It is complicated to detain circuit structure design, higher cost；Fourth is that since that there are electromagnetic interferences is biggish for the power circuit design of detection system
Disadvantage, so that system fluctuation of service.
Summary of the invention
Present invention solves the technical problem that being to overcome the deficiencies of existing technologies, provide a kind of with the inspection of higher fault electric arc
Survey the detection system of accuracy, functional reliability and the arc generator of safety.
In order to solve the above-mentioned technical problem, the present invention is addressed by following technical proposals:
The detection system of arc generator, including be located on firewire and for the current detection circuit of sensed current signal,
For detecting the zero cross detection circuit of voltage over zero, the trip circuit for controlling buckle releaser, for analog-to-digital conversion and to mould
The digital signal obtained after number conversion carries out the MCU of data processing, and zero cross detection circuit is connect with zero curve, firewire respectively, mistake
Zero detection circuit, trip circuit are connect with MCU respectively.Using current detection circuit, zero cross detection circuit, trip circuit, MCU group
At arc generator detection system, improve fault electric arc detection accuracy and reliability, ensure that system operation
Safety.
Preferably, current detection circuit includes current transformer, first resistor, voltage lifting circuit, current transformer
It is located on firewire, first resistor is connected to the secondary side of current transformer, and voltage is lifted the first of circuit and current detection circuit
Output end connection.
Preferably, voltage lifting circuit includes the first operational amplifier, first capacitor, the first impedance network, the second electricity
Resistance, the non-inverting input terminal of the first operational amplifier are connect with the output end of the first impedance network, the reverse phase of the first operational amplifier
Input terminal is connect with the output end of the first operational amplifier, and the power end of the first operational amplifier is connect with supply voltage, and first
Capacitance connection is between the power end of the first operational amplifier and the ground terminal of the first operational amplifier, the connection of the first impedance network
Between pull-up voltage end and ground terminal, second resistance be connected to first resistor and current detection circuit the first output end it
Between；First impedance network includes the second capacitor, third capacitor, 3rd resistor, the 4th resistance, and 3rd resistor is connected to pull-up voltage
End the output end of the first impedance network between, the second capacitance connection pull-up voltage end and ground terminal between, the 4th resistance with
Third capacitor is connected in parallel between the output end and ground terminal of the first impedance network.
Preferably, current detection circuit further includes the 4th capacitor being connected between first resistor and ground terminal, connection
The 5th resistance between first resistor and the second output terminal of current detection circuit is connected to first resistor and current detecting electricity
The 5th capacitor between the second output terminal on road.
Preferably, current detection circuit further include be connected to first resistor and current detection circuit second output terminal it
Between and be connected in series first diode, the 6th resistance.
Preferably, further including for being amplified to the current signal that current detection circuit detects and exporting simulation
The signal amplification circuit of current signal, current detection circuit are connect by signal amplification circuit with MCU；Signal amplification circuit includes
Second operational amplifier, the 7th resistance, the second impedance network, the inverting input terminal and non-inverting input terminal point of second operational amplifier
It is not connect with the first output end and second output terminal of current detection circuit, the 7th resistance is connected to the anti-of second operational amplifier
Between phase input terminal and output end, the second impedance network is connected to the output end of second operational amplifier；Second impedance network packet
Include the 8th resistance, the 9th resistance, the 6th capacitor, the 8th resistance is connected to the output end of second operational amplifier, the 9th resistance with
6th capacitor is connected in series with the 8th resistance again after being connected in parallel.
Another current detection circuit: current detection circuit packet has also been devised in the detection system of arc generator of the invention
Include the current transformer for sensed current signal, the rectification and voltage division electricity for carrying out rectification and voltage division to the current signal of input
Road, for after rectification and voltage division circuit signal carry out signal conversion signal conversion circuit, for judge signal conversion electricity
The output voltage on road whether be more than scheduled first reference voltage and when output level be more than the first reference voltage when generate with it is defeated
Enter to be worth the electrical level judging circuit of the identical output signal of amplitude, integrated and sentenced for the output signal to electrical level judging circuit
Integrating circuit, the output circuit for output signal whether constant volume sub-signal is more than scheduled second reference voltage, electric current are mutual
Sensor, rectification and voltage division circuit, signal conversion circuit, electrical level judging circuit, integrating circuit, output circuit are sequentially connected in series, electricity
Current transformer is located on firewire.Wherein, current transformer samples the current signal of route, obtains current signal；Rectification
The current signal that current transformer exports is carried out rectification and divided according to estimated rate by bleeder circuit, in order to rear class
The cooperation and analysis of circuit；Signal conversion circuit limits the signal of rectification and voltage division circuit output by filter delay circuit, level
Circuit processed and rear class filtering circuit transformations are the current signal for determining whether to occur arcing；Electrical level judging circuit turns in signal
When the level of circuit output is changed more than scheduled first reference voltage, output signal identical with input value amplitude is generated；
Integrating circuit integrates the output signal of electrical level judging circuit, and determines whether integrated signal result is more than scheduled second
Reference voltage；When integrated signal is more than the second reference voltage, output circuit generates fault electric arc signal；
Specifically, rectification and voltage division circuit includes the eight or two pole rectified for the output signal to current transformer
Pipe, the 9th diode, the tenth diode, the 11st diode, for being converted to voltage signal to the current signal after rectification
And to the 26th resistance, the 27th resistance that voltage signal is divided；
Specifically, signal conversion circuit includes level-one filter circuit, clip circuit, the second level filter being sequentially connected in series
Wave circuit, level-one filter circuit and rectification and voltage division circuit connection, secondary filter circuit are connect with electrical level judging circuit；Level-one filtering
Circuit includes the 28th resistance, the 29th resistance, the 17th capacitor, and clip circuit includes level limiter, third
Ten resistance, secondary filter circuit include the 31st resistance, the 18th capacitor；
Specifically, electrical level judging circuit includes first comparator；
Specifically, integrating circuit includes third operational amplifier, the 32nd resistance, the 33rd resistance, the 19th electricity
Hold；
Specifically, output circuit includes the second comparator.
Preferably, zero cross detection circuit includes first resistor network, second resistance network, the 7th capacitor, zero passage detection
Optical coupled switch, switching circuit, first resistor network are connect with zero curve, and second resistance network is connect with firewire, the 7th capacitance connection
Between first resistor network and the output end of second resistance network, between the input side and outlet side of zero passage detection optical coupled switch
It is controlled by optocoupler, zero passage detection optical coupled switch is in parallel with the 7th capacitor；First resistor network includes the tenth electricity being connected in parallel
Resistance, eleventh resistor, twelfth resistor, thirteenth resistor, second resistance network include the 14th resistance being connected in parallel, the tenth
Five resistance, the 16th resistance, the 17th resistance；Switching circuit includes the first triode, the 18th resistance, the 8th capacitor, the tenth
Nine resistance, the 20th resistance, the 9th capacitor, the emitter of the first triode are connect with ground terminal, the 18th resistance and the 8th electricity
Appearance is connected in parallel between control output end and ground terminal, and the 19th resistance is connected to the collector and pull-up electricity of the first triode
Between pressure side, the 20th resistance is connected between zero passage detection optical coupled switch and the base stage of the first triode, the 9th capacitance connection
Between the collector and ground terminal of the first triode.
Preferably, trip circuit includes first switch tube, the second diode, the 21st resistance, the movement of buckle releaser
Mechanisms in series is on firewire, and the control terminal of first switch tube is connected by the output end of the 21st resistance and MCU, first switch
The output end of pipe is connect with ground terminal, and the input terminal of first switch tube and breaking coil one end of buckle releaser connect, buckle releaser
The breaking coil other end is connect with the cathode of the second diode, and the anode of the second diode is connect with firewire.
Preferably, further including the power circuit for MCU power supply, power circuit is connect with MCU；Power circuit includes second
Switching tube, voltage stabilizing chip, the tenth capacitor, third diode, the pin of second switch pass sequentially through the first inductance, the four or two pole
Pipe, the 22nd resistance connect the anode of alternating current and pass sequentially through the cathode of the 11st capacitor and the 5th diode connection alternating current,
The 12nd capacitor is parallel between first inductance and the 4th diode, between the 11st capacitor and the 5th diode；Second switch
The IN pin that the pin of pipe passes sequentially through the 23rd resistance, the second inductance and voltage stabilizing chip connects and passes sequentially through the 24th
Resistance, the 6th diode output+6.8V power supply, the tenth capacitor is parallel between the 24th resistance and the 6th diode, second
Between 13 resistance and the second inductance, the pin of second switch passes sequentially through the 13rd capacitor, the 7th diode, the 14th electricity
Hold, the IN pin connection of the 15th capacitor and voltage stabilizing chip；The both ends of the 14th capacitor, the 15th capacitor that concatenate connection are in parallel
There are the third diode of series connection, the 8th diode and export -6.8V power supply, the IN pin of voltage stabilizing chip passes through the 25th
Resistance, light emitting diode ground connection, OUT pin output+3.3V power supply simultaneously pass through the 16th capacity earth.
In the present invention, the detection system of arc generator further includes three indicator lights connecting respectively with MCU, three instructions
Lamp is respectively yellow LED lamp, red LED lamp, green LED lamp, controls yellow LED lamp, red LED lamp, green respectively by MCU
The different instruction situations of LED light, to realize the warning to loop fault；Such as: when circuit fault-free, green LED lamp flashing
And yellow LED lamp and red LED lamp do not work；When failure electric arc, red LED lamp flashes 8 times, green LED lamp and Huang
Color LED light does not work；When there is leak current fault, yellow LED lamp flashes 8 times, and green LED lamp and red LED lamp do not work.
The detection system of arc generator of the invention determines whether to generate event by the current waveform variation of detection route
Hinder electric arc, MCU detects fault electric arc by fault electric arc detection algorithm, and fault electric arc detection algorithm is specific interior as such as
Under:
MCU obtains the integrated value of 50 power frequency periods by timing A/D conversion and is stored in the integrated value array of definition,
The integrated value difference of the two neighboring power frequency period in the integrated value array is calculated, and sets corresponding threshold value for acquired difference
Be quantified as -1,0,1, obtain the corresponding one group quantization array with time series, and count be not in the quantization array 0 amount
Change value number Na, obtains current waveform situation of change, specific algorithm are as follows:
Two variable m and n are defined, m stores the cycle integrated value of current A/D acquisition, and n stores the work of previous A/D acquisition
Frequency cycle integrated value, to the difference relationship between adjacent current cycle integrated value set different threshold limits t1, t2 ,-t1 ,-
T2 is quantified, and when the difference of m-n is more than or equal to setting value t1, difference is quantified as 1, indicates to be incremented by；When absolute difference is small
In t2, difference is quantified as 0, is indicated constant；When difference is less than or equal to-t1, it is quantified as -1, indicates to successively decrease；
The array T [50] that a length is 50 is defined to be used to store adjacent power frequency period integration differential quantized value, timer
It interrupts and moves one to high-order every 20 milliseconds of the 0-48 elements every by array, and by the quantization of current integration value difference value
Value is stored in the lowest order T [0] of array, is not 0 quantized value number Na in calculating array T [50]；
When the quantized value number Na in quantization array T [50] not being 0 is more than given threshold 8, pass through cycle integrated value
Monotonicity judges interference caused by breaking down electric arc or load normal starting, power regulation etc., specific algorithm are as follows:
When the quantized value number Na in quantization array T [50] not being 0 is more than given threshold 8, statistic quantification array T [50]
In be continuously -1 or the monotony interval number and each monotony interval that are continuously 1 time span, and statistic quantification array
In change to 1 by -1 or change to -1 number by 1, i.e. the monotonicity direction change number of current cycle integrated value in 50 power frequency periods
Nb；
MCU determines whether the electric arc that breaks down by combination features, when current cycle integrated value list in sampling time window
Tonality direction change times N b be greater than set threshold k 2, and Na/Nb be greater than set threshold k 3 when, be judged to occurring
Fault electric arc；
When electric arc is broken down in MCU judgement, MCU, which exports trip signal by trip circuit and triggers buckle releaser and execute, to be taken off
Work is pulled, thus disconnecting circuit.
The algorithm routine that MCU carries out fault electric arc detection includes main program, timer interrupt program and fault electric arc detection
Algorithm routine three parts, program operational process include the following steps:
Step 1: initializing timer in main program, is configured to 20ms Interruption, and program is followed in while
Ring waits interrupt status；
Step 2: timer converts the integrated value in acquisition power frequency period integrating circuit by A/D, and resets integrator,
Integrated value is stored；
Step 3: operation troubles arc-detection algorithm carries out fault verification.
The present invention has significant technical effect: using current detection circuit, zero passage due to using above technical scheme
The detection system for the arc generator that detection circuit, trip circuit, MCU, power circuit form improves fault electric arc detection
Accuracy and reliability ensure that the safety of system operation；The detection system of the arc generator have strong antijamming capability,
Many advantages, such as operation stability is high, detection is accurate and reliable, operational process is safe and cost is relatively low.
Detailed description of the invention
Fig. 1 is the functional block diagram of the detection system first embodiment of arc generator of the invention.
Fig. 2 is the functional block diagram of the detection system second embodiment of arc generator of the invention.
Fig. 3 is the circuit diagram of rectification and voltage division circuit embodiments of the invention.
Fig. 4 is the circuit diagram of signal conversion circuit embodiment of the invention.
Fig. 5 is the circuit diagram of level-one filter circuit embodiment of the invention.
Fig. 6 is the circuit diagram of clip circuit embodiment of the invention.
Fig. 7 is the circuit diagram of secondary filter circuit embodiments of the invention.
Fig. 8 is the circuit diagram of electrical level judgment circuit embodiment of the invention.
Fig. 9 is the circuit diagram of integrating circuit embodiment of the invention.
Figure 10 is the circuit diagram of output circuit embodiment of the invention.
Figure 11 is the circuit diagram of zero cross detection circuit embodiment of the invention.
Figure 12 is the circuit diagram of trip circuit embodiment of the invention.
Figure 13 is the circuit diagram that voltage of the invention is lifted that circuit connect embodiment with signal amplification circuit.
Figure 14 is the circuit diagram of power circuit embodiment of the invention.
Figure 15 is the flow chart of fault electric arc detection algorithm embodiment of the invention.
Figure 16 is the flow chart that fault electric arc of the invention detects main program embodiment.
Figure 17 is the flow chart of MCU timer interrupt routine embodiment of the invention.
Specific embodiment
Present invention is further described in detail with embodiment with reference to the accompanying drawing.
Embodiment 1
The detection system of arc generator as shown in Fig. 1,11-17, including is located on firewire and is used for sensed current signal
Current detection circuit 4, the zero cross detection circuit 5 for detecting voltage over zero, the trip circuit for controlling buckle releaser 6
60, the MCU1 of data processing, zero cross detection circuit 5 are carried out for analog-to-digital conversion and to the digital signal obtained after analog-to-digital conversion
It is connect respectively with zero curve, firewire, zero cross detection circuit 5, trip circuit 60 are connect with MCU1 respectively；Current detection circuit detects
To current signal and be transmitted to MCU, zero cross detection circuit to the voltage over zero of route carry out detection and by obtained failure electricity
Arc signal is transmitted to MCU, and MCU controls the movement of buckle releaser according to current detection circuit and zero cross detection circuit by trip circuit
Mechanism executes trip action.
In the present embodiment, current detection circuit 4 includes current transformer 41, first resistor 47, voltage lifting circuit 48, electricity
Current transformer 41 is located on firewire, and first resistor 47 is connected to the secondary side of current transformer 41, and voltage is lifted circuit 48 and electricity
First output end o1 connection of current detection circuit 4, for output voltage to be lifted predetermined value；
In the present embodiment, it includes the first operational amplifier 4801, first capacitor 4803, the first impedance that voltage, which is lifted circuit 48,
The non-inverting input terminal of network, second resistance 4804, the first operational amplifier 4801 is connect with the output end of the first impedance network, the
The inverting input terminal of one operational amplifier 4801 is connect with the output end of the first operational amplifier 4801, the first operational amplifier
4801 power end is connect with supply voltage, and first capacitor is connected to power end and the first operation of the first operational amplifier 4801
Between the ground terminal of amplifier 4801, the first impedance network is connected between pull-up voltage end S and ground terminal, second resistance 4804
It is connected between first resistor 47 and the first output end o1 of current detection circuit；First impedance network includes the second capacitor
4811, third capacitor 4802,3rd resistor 4812, the 4th resistance 4810,3rd resistor are connected to the resistance of pull-up voltage end S and first
Between the output end of anti-network, the second capacitance connection is between pull-up voltage end S and ground terminal, and the 4th resistance and third capacitor are simultaneously
Connection is connected between the output end and ground terminal of the first impedance network；It is raw voltage can be lifted circuit by second resistance 4804
At lifting voltage be attached to first resistor 47 generation voltage detection signal and the output voltage of first resistor 47 is raised, make
The output voltage amplitude for obtaining current detection circuit is adapted with late-class circuit；
In the present embodiment, current detection circuit further includes the 4th capacitor being connected between first resistor 47 and ground terminal
4809, it is connected to the 5th resistance 4808 between first resistor 47 and the second output terminal of current detection circuit, is connected to first
The 5th capacitor 4807 between resistance 47 and the second output terminal of current detection circuit；
In the present embodiment, current detection circuit further includes the second output for being connected to first resistor 47 and current detection circuit
The first diode 4806 between o2 and being connected in series, the 6th resistance 4805 are held, provides protection for circuit；
It further include for being amplified to the current signal that current detection circuit detects and exporting mould in the present embodiment
The signal amplification circuit 7 of quasi- current signal, current detection circuit 4 are connect by signal amplification circuit 7 with MCU1；Signal amplification electricity
Road 7 includes second operational amplifier 71, the 7th resistance 72, the second impedance network, the inverting input terminal of second operational amplifier 71
It is connect respectively with the first output end and second output terminal of current detection circuit with non-inverting input terminal, the 7th resistance is connected to second
Between the inverting input terminal and output end of operational amplifier, the second impedance network is connected to the output end of second operational amplifier；
Second impedance network includes the 8th resistance 73, the 9th resistance 75, the 6th capacitor 74, and the 8th resistance is connected to second operational amplifier
Output end, the 9th resistance and the 6th capacitor are connected in series with the 8th resistance again after being connected in parallel；Second impedance network is to defeated
Signal out is arranged, to obtain more preferably analog detection signal Vd and be transmitted to MCU.
In the present embodiment, zero cross detection circuit 5 include first resistor network 51, first resistor network 52, the 7th capacitor 53,
Zero passage detection optical coupled switch 54, switching circuit 55, first resistor network 51 are connect with zero curve, and first resistor network 52 and firewire connect
It connects, the 7th capacitor 53 is connected between first resistor network 51 and the output end of first resistor network 52, and zero passage detection optocoupler is opened
It closes and is controlled between 54 input side and outlet side by optocoupler, zero passage detection optical coupled switch 54 is in parallel with the 7th capacitor 53；First
Resistor network 51 includes the tenth resistance 511 being connected in parallel, eleventh resistor 512, twelfth resistor 513, thirteenth resistor
514, first resistor network 52 includes the 14th resistance 521 being connected in parallel, the 15th resistance 522, the 16th resistance 523, the
17 resistance 524；Switching circuit 55 includes the first triode 553, the 18th resistance 551, the 8th capacitor 552, the 19th resistance
555, the emitter of the 20th resistance 556, the 9th capacitor 554, the first triode 553 is connect with ground terminal, the 18th resistance 551
It is connected in parallel between control output end and ground terminal with the 8th capacitor 552, the 19th resistance 555 is connected to the first triode
Between 553 collector and pull-up voltage end, the 20th resistance 556 is connected to zero passage detection optical coupled switch 54 and the first triode
Between 553 base stage, the 9th capacitor 554 is connected between the collector and ground terminal of the first triode 553.
Wherein, zero passage detection optical coupled switch 54 has input side and outlet side, passes through optocoupler between input side and outlet side
Control, zero passage detection optical coupled switch 54 according to input side both end voltage whether Super-zero control outlet side both ends on or off, lead to
It crosses zero passage detection optical coupled switch 54 and carries out influence of the harmonic wave for signal processing circuit that route can be isolated in zero passage detection；Specifically
Ground, zero passage detection optical coupled switch 54 is one with the diode pair of the opposite mode parallel connection of anode and cathode, in input voltage zero passage
When the light that exports can change；The outlet side of zero passage detection optical coupled switch 54 is light-operated switch, and both ends are connected to pull-up voltage
It holds between S and control output end cr.
Wherein, switching circuit 55 is connected between pull-up voltage end S and ground terminal, and control terminal and control output end cr connect
It connects, exports different level in zero passage detection 54 turn-on and turn-off of optical coupled switch；Specifically, when the voltage for detecting route is remote
When from zero crossing, zero passage detection optical coupled switch 54 is in the conductive state, at this time on the voltage of the control terminal of the first triode 553
Drawing is higher level, and the output end of the conducting of the first triode 553, switching circuit 55 exports low level；And works as and detect route
When voltage is near voltage over zero, zero passage detection optical coupled switch 54 ends, at this time the electricity of the control terminal of the first triode 553
Stream flows to ground terminal by the second ten resistance 556, the 18th resistance 551, so that the first triode 553 disconnects, switching circuit 55
Output end export high level；Therefore, switching circuit 55 can be in the pulse of each near zero-crossing point output high level.
In the present embodiment, trip circuit 60 includes first switch tube 603, the second diode 601, the 21st resistance 604,
The actuating mechanism of buckle releaser 6 is connected on firewire, and the control terminal of first switch tube 603 passes through the 21st resistance 604 and MCU1
Output end connection, the output end of first switch tube 603 connect with ground terminal, the input terminal and buckle releaser 6 of first switch tube 603
The connection of 602 one end of breaking coil, 602 other end of breaking coil of buckle releaser 6 connect with the cathode of the second diode 601, the
The anode of two diodes 601 is connect with firewire；After MCU1 exports open circuit control signal, given by the 21st resistance 604
The control terminal of first switch tube 603 provides start pulse signal control first switch tube 603 and is connected, at this time the tripping line of buckle releaser
Circuit where circle 602 is switched on, so that DC current flows through breaking coil 602, it is dynamic that the actuating mechanism of buckle releaser executes tripping
Make, thus disconnecting circuit.
It further include the power circuit 3 for MCU1 power supply in the present embodiment, power circuit 3 is connect with MCU1；Power circuit 3
Including second switch 308, voltage stabilizing chip 301, the tenth capacitor 304, third diode 319, the pin of second switch 308 according to
Secondary the first inductance 309, the 4th diode 310, the 22nd resistance 311 of passing through connects the anode of alternating current and passes sequentially through the 11st
Capacitor 314 and the 5th diode 312 connection alternating current cathode, between the first inductance 309 and the 4th diode 310, the 11st electricity
The 12nd capacitor 313 is parallel between appearance 314 and the 5th diode 312；The pin of second switch 308 passes sequentially through the 20th
Three resistance 306, the second inductance 302 connect with the IN pin of voltage stabilizing chip 301 and pass sequentially through the 24th resistance the 305, the 6th
303 output+6.8V power supply of diode, the tenth capacitor 304 is parallel between the 24th resistance 305 and the 6th diode 303,
Between 23 resistance 306 and the second inductance 302, the pin of second switch 308 passes sequentially through the 13rd capacitor the 307, the 7th
Diode 315, the 14th capacitor 317, the 15th capacitor 316 are connect with the IN pin of voltage stabilizing chip 301；The tenth of concatenation connection
Four capacitors 317, the 15th capacitor 316 both ends be parallel with the third diode 319 of series connection, the 8th diode 421 and defeated
The IN pin of -6.8V power supply out, voltage stabilizing chip 301 passes through the 25th resistance 321, the ground connection of light emitting diode 320, OUT pin
Output+3.3V power supply is simultaneously grounded by the 16th capacitor 322.Regulated power supply is exported using three tunnels of second switch 308, is had
System stable operation, high reliablity, the advantages of practical and cost is relatively low.
Wherein, pressure stabilizing clipping, feedback to the tenth are carried out by the third diode 319, the 6th diode 303 that are connected in parallel
Voltage on capacitor 304 is the sum of the 14th capacitor 317 being connected in series, the voltage at 316 both ends of the 15th capacitor；It opens when second
When closing the disconnection of pipe 308, the conducting of fast the 7th diode 315 of quick-recovery, so that the 14th capacitor 317 is charged to the pressure stabilizing of setting
Value is 6.8V；In order to reduce 304 both end voltage of the tenth capacitor to the tracking error of output voltage, third diode 319 and the 7th
Diode 315 selects the diode of identical tube voltage drop；Increase by the 5th diode 312 in the low pressure return terminal of circuit, improves half
The electromagnetic interference performance of wave rectification design.
In the present embodiment, the detection system of arc generator further includes three indicator lights 2 connecting respectively with MCU, and three
Indicator light 2 be respectively yellow LED lamp 21, red LED lamp 22, green LED lamp 23, controlled respectively by MCU1 yellow LED lamp 21,
Red LED lamp 22, the different instruction situations of green LED lamp 23, to realize the warning to loop fault；Such as: when circuit without reason
When barrier, green LED lamp flashes and yellow LED lamp and red LED lamp do not work；When failure electric arc, red LED lamp flashing
8 times, green LED lamp and yellow LED lamp do not work；When there is leak current fault, yellow LED lamp flash 8 times, green LED lamp and
Red LED lamp does not work.
The detection system of the arc generator of the present embodiment determines whether to generate by the current waveform variation of detection route
Fault electric arc, MCU detect fault electric arc by fault electric arc detection algorithm, and fault electric arc detection algorithm is specific interior as such as
Under:
MCU obtains the integrated value of 50 power frequency periods by timing A/D conversion and is stored in the integrated value array of definition,
The integrated value difference of the two neighboring power frequency period in the integrated value array is calculated, and sets corresponding threshold value for acquired difference
Be quantified as -1,0,1, obtain the corresponding one group quantization array with time series, and count be not in the quantization array 0 amount
Change value number Na, obtains current waveform situation of change, specific algorithm are as follows:
Two variable m and n are defined, m stores the cycle integrated value of current A/D acquisition, and n stores the work of previous A/D acquisition
Frequency cycle integrated value, to the difference relationship between adjacent current cycle integrated value set different threshold limits t1, t2 ,-t1 ,-
T2 is quantified, and when the difference of m-n is more than or equal to setting value t1, difference is quantified as 1, indicates to be incremented by；When absolute difference is small
In t2, difference is quantified as 0, is indicated constant；When difference is less than or equal to-t1, it is quantified as -1, indicates to successively decrease；
The array T [50] that a length is 50 is defined to be used to store adjacent power frequency period integration differential quantized value, timer
It interrupts and moves one to high-order every 20 milliseconds of the 0-48 elements every by array, and by the quantization of current integration value difference value
Value is stored in the lowest order T [0] of array, is not 0 quantized value number Na in calculating array T [50]；
When the quantized value number Na in quantization array T [50] not being 0 is more than given threshold 8, pass through cycle integrated value
Monotonicity judges interference caused by breaking down electric arc or load normal starting, power regulation etc., specific algorithm are as follows:
When the quantized value number Na in quantization array T [50] not being 0 is more than given threshold 8, statistic quantification array T [50]
In be continuously -1 or the monotony interval number and each monotony interval that are continuously 1 time span, and statistic quantification array
In change to 1 by -1 or change to -1 number by 1, i.e. the monotonicity direction change number of current cycle integrated value in 50 power frequency periods
Nb；
MCU determines whether the electric arc that breaks down by combination features, when current cycle integrated value list in sampling time window
Tonality direction change times N b be greater than set threshold k 2, and Na/Nb be greater than set threshold k 3 when, be judged to occurring
Fault electric arc；
When electric arc is broken down in MCU judgement, MCU, which exports trip signal by trip circuit and triggers buckle releaser and execute, to be taken off
Work is pulled, thus disconnecting circuit.
The algorithm routine that MCU carries out fault electric arc detection includes main program, timer interrupt program and fault electric arc detection
Algorithm routine three parts, program operational process include the following steps:
Step 1: initializing timer in main program, is configured to 20ms Interruption, and program is followed in while
Ring waits interrupt status；
Step 2: timer converts the integrated value in acquisition power frequency period integrating circuit by A/D, and resets integrator,
Integrated value is stored；
Step 3: operation troubles arc-detection algorithm carries out fault verification.
Embodiment 2
The detection system of arc generator as shown in Fig. 2-12,14-17, including is located on firewire and is used to detect electric current
The current detection circuit 4 of signal, the zero cross detection circuit 5 for detecting voltage over zero, the tripping electricity for controlling buckle releaser 6
Road 60, the MCU1 that data processing is carried out for analog-to-digital conversion and to the digital signal obtained after analog-to-digital conversion, zero passage detection electricity
Road 5 is connect with zero curve, firewire respectively, and zero cross detection circuit 5, trip circuit 60 are connect with MCU1 respectively；Current detection circuit inspection
It measures current signal and is transmitted to MCU, the event that zero cross detection circuit carries out detection to the voltage over zero of route and will obtain
Barrier arc signal is transmitted to MCU, and MCU controls buckle releaser by trip circuit according to current detection circuit and zero cross detection circuit
Actuating mechanism executes trip action.
In the present embodiment, current detection circuit 4 includes for the current transformer 41 of sensed current signal, for input
Current signal carry out rectification and voltage division rectification and voltage division circuit 42, for after rectification and voltage division circuit signal carry out signal turn
Whether signal conversion circuit 43, the output voltage for judging signal conversion circuit 43 changed is more than scheduled first reference voltage
And generated when output level is more than the first reference voltage identical with input value amplitude output signal electrical level judging circuit 44,
It is integrated for the output signal to electrical level judging circuit 44 and determines whether integrated signal is more than scheduled second benchmark electricity
The integrating circuit 45 of pressure, the output circuit 46 for output signal, current transformer 41, rectification and voltage division circuit 42, signal conversion
Circuit 43, electrical level judging circuit 44, integrating circuit 45, output circuit 46 are sequentially connected in series, and current transformer 41 is located at firewire
On.Current transformer is by the current detecting on route, real-time dynamicly exporting detected current signal；Rectification and voltage division
The current signal that current transformer exports is carried out rectification and divided according to estimated rate by circuit, in order to late-class circuit
Cooperation and analysis；The signal of rectification and voltage division circuit output is limited electricity by filter delay circuit, level by signal conversion circuit
Road and rear class filtering circuit transformations are the current signal for determining whether to occur arcing；Electrical level judging circuit converts electricity in signal
When the level of road output is more than scheduled first reference voltage, output signal identical with input value amplitude is generated；Integral
Circuit integrates the output signal of electrical level judging circuit, and determines whether integrated signal result is more than scheduled second benchmark
Voltage；When integrated signal is more than the second reference voltage, output circuit generates fault electric arc signal.
In the present embodiment, rectification and voltage division circuit 42 includes rectified for the output signal to current transformer 41
Eight diodes 421, the 9th diode 422, the tenth diode 423, the 11st diode 424, for the electric current after rectification
The 26th resistance 425, the 27th resistance 426 that signal is converted to voltage signal and is divided to voltage signal；By
The rectified current of eight diodes 421, the 9th diode 422, the tenth diode 423, the 11st 424 4 diodes of diode composition
Road rectifies current transformer output signal, and the current signal of alternation is become direct current signal；26th resistance 425,
27th resistance 426 constitutes divider, is converted to voltage signal to the current signal of amplitude, while to it according to setting
Ratio is divided.
In the present embodiment, signal conversion circuit 43 includes the level-one filter circuit 431 being sequentially connected in series, level limitation electricity
Road 432, secondary filter circuit 433, level-one filter circuit 431 are connect with rectification and voltage division circuit 42, secondary filter circuit 433 and electricity
Flat decision circuitry 44 connects；Level-one filter circuit 431 includes the 28th resistance 4311, the 29th resistance the 4312, the 17th
Capacitor 4313, clip circuit 432 include level limiter 4322, the 30th resistance 4321, and secondary filter circuit 433 includes
31st resistance 4331, the 18th capacitor 4332；Since there are more high-frequency signals for arc signal, and usually, city's electric signal is
Low frequency signal, signal conversion circuit can only be such that high-frequency signal passes through；Level-one filter circuit is filter delay circuit, to voltage division signal
Low frequency signal filtering is carried out, the low frequency signal in voltage signal is filtered out；Wherein, the 28th resistance 4311, the 29th resistance
4312 groups of voltage dividers divide prime voltage division signal again, to share the power of circuit；29th resistance the 4312, the tenth
Seven capacitors 4313 form high-pass filtering delay circuit, carry out filtering out processing to the low frequency signal in circuit；Clip circuit limit
The amplitude of system input secondary filter circuit, avoids high voltage from damaging late-class circuit；Wherein, due to when the 26th resistance 425, the
After the divider that 27 resistance 426 are constituted makes rectified signal carry out decaying according to fixed ratio with stabilizing circuit, still need to
Level limiter 4322 limits the voltage level for being input to late-class circuit, and reason is: when excessive pulse occurs, even declining
Signal after subtracting can also have an impact circuit, and clip circuit then plays the protective effect to late-class circuit；Third
Ten resistance 4321 have the function of undertaking the power in circuit；It is made of the 31st resistance 4331, the 18th capacitor 4332
Secondary filter circuit further filters the signal that clip circuit exports, and avoids the influence of interference signal.
In the present embodiment, electrical level judging circuit 44 includes first comparator 440, and first comparator 440 is to by the 31st
The output signal for the secondary filter circuit that resistance 4331, the 18th capacitor 4332 form and the first reference voltage set carry out
Compare, when the output signal is higher than the first reference voltage, the output of first comparator 440 and filtering signal with amplitude follow letter
Number.
In the present embodiment, integrating circuit 45 includes third operational amplifier 453, the 451, the 33rd electricity of the 32nd resistance
Hinder the 452, the 19th capacitor 454.By third operational amplifier 453, the 32nd resistance 451, the 33rd resistance the 452, the tenth
The integrating circuit 45 of nine capacitors 454 composition, realizes the integral to the output signal of electrical level judging circuit.
In the present embodiment, output circuit 46 includes the second comparator 460, and the second comparator 460 is exported to by integrating circuit
Integrated signal be compared with the second reference voltage set, when integrated signal be higher than the second reference voltage when, output
Power level and simultaneous transmission are to MCU1.
In the present embodiment, zero cross detection circuit 5 include first resistor network 51, first resistor network 52, the 7th capacitor 53,
Zero passage detection optical coupled switch 54, switching circuit 55, first resistor network 51 are connect with zero curve, and first resistor network 52 and firewire connect
It connects, the 7th capacitor 53 is connected between first resistor network 51 and the output end of first resistor network 52, and zero passage detection optocoupler is opened
It closes and is controlled between 54 input side and outlet side by optocoupler, zero passage detection optical coupled switch 54 is in parallel with the 7th capacitor 53；First
Resistor network 51 includes the tenth resistance 511 being connected in parallel, eleventh resistor 512, twelfth resistor 513, thirteenth resistor
514, first resistor network 52 includes the 14th resistance 521 being connected in parallel, the 15th resistance 522, the 16th resistance 523, the
17 resistance 524；Switching circuit 55 includes the first triode 553, the 18th resistance 551, the 8th capacitor 552, the 19th resistance
555, the emitter of the 20th resistance 556, the 9th capacitor 554, the first triode 553 is connect with ground terminal, the 18th resistance 551
It is connected in parallel between control output end and ground terminal with the 8th capacitor 552, the 19th resistance 555 is connected to the first triode
Between 553 collector and pull-up voltage end, the 20th resistance 556 is connected to zero passage detection optical coupled switch 54 and the first triode
Between 553 base stage, the 9th capacitor 554 is connected between the collector and ground terminal of the first triode 553.
Wherein, zero passage detection optical coupled switch 54 has input side and outlet side, passes through optocoupler between input side and outlet side
Control, zero passage detection optical coupled switch 54 according to input side both end voltage whether Super-zero control outlet side both ends on or off, lead to
It crosses zero passage detection optical coupled switch 54 and carries out influence of the harmonic wave for signal processing circuit that route can be isolated in zero passage detection；Specifically
Ground, zero passage detection optical coupled switch 54 is one with the diode pair of the opposite mode parallel connection of anode and cathode, in input voltage zero passage
When the light that exports can change；The outlet side of zero passage detection optical coupled switch 54 is light-operated switch, and both ends are connected to pull-up voltage
It holds between S and control output end cr.
Wherein, switching circuit 55 is connected between pull-up voltage end S and ground terminal, and control terminal and control output end cr connect
It connects, exports different level in zero passage detection 54 turn-on and turn-off of optical coupled switch；Specifically, when the voltage for detecting route is remote
When from zero crossing, zero passage detection optical coupled switch 54 is in the conductive state, at this time on the voltage of the control terminal of the first triode 553
Drawing is higher level, and the output end of the conducting of the first triode 553, switching circuit 55 exports low level；And works as and detect route
When voltage is near voltage over zero, zero passage detection optical coupled switch 54 ends, at this time the electricity of the control terminal of the first triode 553
Stream flows to ground terminal by the second ten resistance 556, the 18th resistance 551, so that the first triode 553 disconnects, switching circuit 55
Output end export high level；Therefore, switching circuit 55 can be in the pulse of each near zero-crossing point output high level.
In the present embodiment, trip circuit 60 includes first switch tube 603, the second diode 601, the 21st resistance 604,
The actuating mechanism of buckle releaser 6 is connected on firewire, and the control terminal of first switch tube 603 passes through the 21st resistance 604 and MCU1
Output end connection, the output end of first switch tube 603 connect with ground terminal, the input terminal and buckle releaser 6 of first switch tube 603
The connection of 602 one end of breaking coil, 602 other end of breaking coil of buckle releaser 6 connect with the cathode of the second diode 601, the
The anode of two diodes 601 is connect with firewire；After MCU1 exports open circuit control signal, given by the 21st resistance 604
The control terminal of first switch tube 603 provides start pulse signal control first switch tube 603 and is connected, at this time the tripping line of buckle releaser
Circuit where circle 602 is switched on, so that DC current flows through breaking coil 602, it is dynamic that the actuating mechanism of buckle releaser executes tripping
Make, thus disconnecting circuit.
It further include the power circuit 3 for MCU1 power supply in the present embodiment, power circuit 3 is connect with MCU1；Power circuit 3
Including second switch 308, voltage stabilizing chip 301, the tenth capacitor 304, third diode 319, the pin of second switch 308 according to
Secondary the first inductance 309, the 4th diode 310, the 22nd resistance 311 of passing through connects the anode of alternating current and passes sequentially through the 11st
Capacitor 314 and the 5th diode 312 connection alternating current cathode, between the first inductance 309 and the 4th diode 310, the 11st electricity
The 12nd capacitor 313 is parallel between appearance 314 and the 5th diode 312；The pin of second switch 308 passes sequentially through the 20th
Three resistance 306, the second inductance 302 connect with the IN pin of voltage stabilizing chip 301 and pass sequentially through the 24th resistance the 305, the 6th
303 output+6.8V power supply of diode, the tenth capacitor 304 is parallel between the 24th resistance 305 and the 6th diode 303,
Between 23 resistance 306 and the second inductance 302, the pin of second switch 308 passes sequentially through the 13rd capacitor the 307, the 7th
Diode 315, the 14th capacitor 317, the 15th capacitor 316 are connect with the IN pin of voltage stabilizing chip 301；The tenth of concatenation connection
Four capacitors 317, the 15th capacitor 316 both ends be parallel with the third diode 319 of series connection, the 8th diode 421 and defeated
The IN pin of -6.8V power supply out, voltage stabilizing chip 301 passes through the 25th resistance 321, the ground connection of light emitting diode 320, OUT pin
Output+3.3V power supply is simultaneously grounded by the 16th capacitor 322.Regulated power supply is exported using three tunnels of second switch 308, is had
System stable operation, high reliablity, the advantages of practical and cost is relatively low.
Wherein, pressure stabilizing clipping, feedback to the tenth are carried out by the third diode 319, the 6th diode 303 that are connected in parallel
Voltage on capacitor 304 is the sum of the 14th capacitor 317 being connected in series, the voltage at 316 both ends of the 15th capacitor；It opens when second
When closing the disconnection of pipe 308, the conducting of fast the 7th diode 315 of quick-recovery, so that the 14th capacitor 317 is charged to the pressure stabilizing of setting
Value is 6.8V；In order to reduce 304 both end voltage of the tenth capacitor to the tracking error of output voltage, third diode 319 and the 7th
Diode 315 selects the diode of identical tube voltage drop；Increase by the 5th diode 312 in the low pressure return terminal of circuit, improves half
The electromagnetic interference performance of wave rectification design.
In the present embodiment, the detection system of arc generator further includes three indicator lights 2 connecting respectively with MCU, and three
Indicator light 2 be respectively yellow LED lamp 21, red LED lamp 22, green LED lamp 23, controlled respectively by MCU1 yellow LED lamp 21,
Red LED lamp 22, the different instruction situations of green LED lamp 23, to realize the warning to loop fault；Such as: when circuit without reason
When barrier, green LED lamp flashes and yellow LED lamp and red LED lamp do not work；When failure electric arc, red LED lamp flashing
8 times, green LED lamp and yellow LED lamp do not work；When there is leak current fault, yellow LED lamp flash 8 times, green LED lamp and
Red LED lamp does not work.
The detection system of the arc generator of the present embodiment determines whether to generate by the current waveform variation of detection route
Fault electric arc, MCU detect fault electric arc by fault electric arc detection algorithm, and fault electric arc detection algorithm is specific interior as such as
Under:
MCU obtains the integrated value of 50 power frequency periods by timing A/D conversion and is stored in the integrated value array of definition,
The integrated value difference of the two neighboring power frequency period in the integrated value array is calculated, and sets corresponding threshold value for acquired difference
Be quantified as -1,0,1, obtain the corresponding one group quantization array with time series, and count be not in the quantization array 0 amount
Change value number Na, obtains current waveform situation of change, specific algorithm are as follows:
Two variable m and n are defined, m stores the cycle integrated value of current A/D acquisition, and n stores the work of previous A/D acquisition
Frequency cycle integrated value, to the difference relationship between adjacent current cycle integrated value set different threshold limits t1, t2 ,-t1 ,-
T2 is quantified, and when the difference of m-n is more than or equal to setting value t1, difference is quantified as 1, indicates to be incremented by；When absolute difference is small
In t2, difference is quantified as 0, is indicated constant；When difference is less than or equal to-t1, it is quantified as -1, indicates to successively decrease；
The array T [50] that a length is 50 is defined to be used to store adjacent power frequency period integration differential quantized value, timer
It interrupts and moves one to high-order every 20 milliseconds of the 0-48 elements every by array, and by the quantization of current integration value difference value
Value is stored in the lowest order T [0] of array, is not 0 quantized value number Na in calculating array T [50]；
When the quantized value number Na in quantization array T [50] not being 0 is more than given threshold 8, pass through cycle integrated value
Monotonicity judges interference caused by breaking down electric arc or load normal starting, power regulation etc., specific algorithm are as follows:
When the quantized value number Na in quantization array T [50] not being 0 is more than given threshold 8, statistic quantification array T [50]
In be continuously -1 or the monotony interval number and each monotony interval that are continuously 1 time span, and statistic quantification array
In change to 1 by -1 or change to -1 number by 1, i.e. the monotonicity direction change number of current cycle integrated value in 50 power frequency periods
Nb；
MCU determines whether the electric arc that breaks down by combination features, when current cycle integrated value list in sampling time window
Tonality direction change times N b be greater than set threshold k 2, and Na/Nb be greater than set threshold k 3 when, be judged to occurring
Fault electric arc；
When electric arc is broken down in MCU judgement, MCU, which exports trip signal by trip circuit and triggers buckle releaser and execute, to be taken off
Work is pulled, thus disconnecting circuit.
The algorithm routine that MCU carries out fault electric arc detection includes main program, timer interrupt program and fault electric arc detection
Algorithm routine three parts, program operational process include the following steps:
Step 1: initializing timer in main program, is configured to 20ms Interruption, and program is followed in while
Ring waits interrupt status；
Step 2: timer converts the integrated value in acquisition power frequency period integrating circuit by A/D, and resets integrator,
Integrated value is stored；
Step 3: operation troubles arc-detection algorithm carries out fault verification.
In short, the foregoing is merely presently preferred embodiments of the present invention, it is all according to equalization made by scope of the present invention patent
Variation and modification, shall all be covered by the patent of the invention.
Claims (9)
1. the detection system of arc generator, it is characterised in that: the electric current including being located on firewire and being used for sensed current signal
Detection circuit (4), zero cross detection circuit (5), the trip circuit for controlling buckle releaser (6) for detecting voltage over zero
(60), the MCU (1) of data processing, zero passage detection are carried out for analog-to-digital conversion and to the digital signal obtained after analog-to-digital conversion
Circuit (5) is connect with zero curve, firewire respectively, and zero cross detection circuit (5), trip circuit (60) are connect with MCU (1) respectively；Electric current
Detection circuit (4) detection obtains current signal and is transmitted to MCU (1), and zero cross detection circuit (5) clicks through the voltage zero-cross of route
Row detects and is transmitted to obtained fault electric arc signal MCU (1), and MCU (1) is according to current detection circuit (4) and zero passage detection
Circuit (5) executes trip action by the actuating mechanism of trip circuit (60) control buckle releaser (6).
2. the detection system of arc generator according to claim 1, it is characterised in that: current detection circuit (4) includes
Current transformer (41), first resistor (47), voltage lifting circuit (48), current transformer (41) are located on firewire, the first electricity
Resistance (47) is connected to the secondary sides of current transformer (41), and it is first defeated to be lifted circuit (48) and current detection circuit (4) for voltage
Outlet connection.
3. the detection system of arc generator according to claim 2, it is characterised in that: voltage is lifted circuit (48) and includes
First operational amplifier (4801), first capacitor (4803), the first impedance network, second resistance (4804), the first operation amplifier
The non-inverting input terminal of device (4801) is connect with the output end of the first impedance network, the anti-phase input of the first operational amplifier (4801)
End is connect with the output end of the first operational amplifier (4801), and the power end and supply voltage of the first operational amplifier (4801) connect
It connects, first capacitor (4803) is connected to the power end of the first operational amplifier (4801) and connecing for the first operational amplifier (4801)
Between ground terminal, the first impedance network is connected between pull-up voltage end and ground terminal, and second resistance (4804) is connected to the first electricity
It hinders between (47) and the first output end of current detection circuit (4)；First impedance network includes the second capacitor (4811), third electricity
Hold (4802), 3rd resistor (4812), the 4th resistance (4810), 3rd resistor (4812) is connected to pull-up voltage end and the first resistance
Between the output end of anti-network, the second capacitor (4811) is connected between pull-up voltage end and ground terminal, the 4th resistance (4810)
It is connected in parallel between the output end and ground terminal of the first impedance network with third capacitor (4802).
4. the detection system of arc generator according to claim 2 or 3, it is characterised in that: current detection circuit (4) is also
Including be connected between first resistor (47) and ground terminal the 4th capacitor (4809), be connected to first resistor (47) and electric current and examine
The 5th resistance (4808) between the second output terminal of slowdown monitoring circuit (4) is connected to first resistor (47) and current detection circuit (4)
Second output terminal between the 5th capacitor (4807).
5. the detection system of arc generator according to claim 4, it is characterised in that: current detection circuit (4) also wraps
Include the first diode for being connected to and between first resistor (47) and the second output terminal of current detection circuit (4) and being connected in series
(4806), the 6th resistance (4805).
6. the detection system of arc generator described according to claim 1 or 2 or 3 or 5, it is characterised in that: further include being used for
The current signal that current detection circuit (4) detection obtains is amplified and exports the signal amplification circuit of analog current signal
(7), current detection circuit (4) is connect by signal amplification circuit (7) with MCU (1)；Signal amplification circuit (7) includes the second fortune
Calculate amplifier (71), the 7th resistance (72), the second impedance network, the inverting input terminal of second operational amplifier (71) with mutually defeated
Enter end to connect with the first output end of current detection circuit (4) and second output terminal respectively, the 7th resistance (72) is connected to second
Between the inverting input terminal and output end of operational amplifier (71), the second impedance network is connected to second operational amplifier (71)
Output end；Second impedance network includes the 8th resistance (73), the 9th resistance (75), the 6th capacitor (74), and the 8th resistance (73) is even
Connect the output end in second operational amplifier (71), the 9th resistance (75) and the 6th capacitor (74) be connected in parallel after again with the 8th
Resistance (73) is connected in series.
7. the detection system of arc generator according to claim 6, it is characterised in that: zero cross detection circuit (5) includes
First resistor network (51), second resistance network (52), the 7th capacitor (53), zero passage detection optical coupled switch (54), switching circuit
(55), first resistor network (51) is connect with zero curve, and second resistance network (52) is connect with firewire, and the 7th capacitor (53) is connected to
Between first resistor network (51) and the output end of second resistance network (52), the input side of zero passage detection optical coupled switch (54) and
It is controlled between outlet side by optocoupler, zero passage detection optical coupled switch (54) is in parallel with the 7th capacitor (53)；First resistor network
It (51) include the tenth resistance (511) being connected in parallel, eleventh resistor (512), twelfth resistor (513), thirteenth resistor
(514), second resistance network (52) includes the 14th resistance (521) being connected in parallel, the 15th resistance (522), the 16th electricity
Hinder (523), the 17th resistance (524)；Switching circuit (55) includes the first triode (553), the 18th resistance (551), the 8th
Capacitor (552), the 19th resistance (555), the 20th resistance (556), the 9th capacitor (554), the transmitting of the first triode (553)
Pole is connect with ground terminal, the 18th resistance (551) and the 8th capacitor (552) be connected in parallel control output end and ground terminal it
Between, the 19th resistance (555) is connected between the collector of the first triode (553) and pull-up voltage end, the 20th resistance
(556) it is connected between zero passage detection optical coupled switch (54) and the base stage of the first triode (553), the connection of the 9th capacitor (554)
Between the collector and ground terminal of the first triode (553).
8. the detection system of arc generator described according to claim 1 or 2 or 3 or 5 or 7, it is characterised in that: trip circuit
It (60) include first switch tube (603), the second diode (601), the 21st resistance (604), the actuating mechanism of buckle releaser (6)
It is connected on firewire, the control terminal of first switch tube (603) is connected by the 21st resistance (604) and the output end of MCU (1)
It connects, the output end of first switch tube (603) is connect with ground terminal, the input terminal of first switch tube (603) and the jump of buckle releaser (6)
The connection of brake cable circle (602) one end, breaking coil (602) other end of buckle releaser (6) and the cathode of the second diode (601) connect
It connects, the anode of the second diode (601) is connect with firewire.
9. the detection system of arc generator according to claim 8, it is characterised in that: further include powering for MCU (1)
Power circuit (3), power circuit (3) are connect with MCU (1)；Power circuit (3) includes second switch (308), voltage stabilizing chip
(301), the pin of the tenth capacitor (304), third diode (319), second switch (308) passes sequentially through the first inductance
(309), the 4th diode (310), the 22nd resistance (311) connect the anode of alternating current and pass sequentially through the 11st capacitor
(314) and the cathode of the 5th diode (312) connection alternating current, between the first inductance (309) and the 4th diode (310), the tenth
The 12nd capacitor (313) is parallel between one capacitor (314) and the 5th diode (312)；The pin of second switch (308) according to
It is secondary to pass through the 23rd resistance (306), the second inductance (302) is connect with the IN pin of voltage stabilizing chip (301) and pass sequentially through
24 resistance (305), the 6th diode (303) output+6.8V power supply, the tenth capacitor (304) are parallel to the 24th resistance
(305) between the 6th diode (303), between the 23rd resistance (306) and the second inductance (302), second switch
(308) pin passes sequentially through the 13rd capacitor (307), the 7th diode (315), the 14th capacitor (317), the 15th capacitor
(316) it is connect with the IN pin of voltage stabilizing chip (301)；Concatenate the 14th capacitor (317), the 15th capacitor (316) connected
Both ends are parallel with the third diode (319) of series connection, the 8th diode (421) and export -6.8V power supply, voltage stabilizing chip
(301) IN pin passes through the 25th resistance (321), light emitting diode (320) ground connection, OUT pin output+3.3V power supply simultaneously
It is grounded by the 16th capacitor (322).
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| CN110386007A (en) * | 2019-07-23 | 2019-10-29 | 南京信息工程大学 | A kind of method of electric car and electric bicycle charge and discharge spontaneous combustion protective device and spontaneous combustion protective device processing digital signal |
| CN111355220A (en) * | 2020-03-02 | 2020-06-30 | 珠海格力电器股份有限公司 | Tripping control device, power supply system and tripping control method thereof |
| CN113671244A (en) * | 2021-08-06 | 2021-11-19 | 优利德科技(中国)股份有限公司 | Amplification module, detection sampling device and signal sampling amplification method |
| CN117175926A (en) * | 2023-11-03 | 2023-12-05 | 瑞森半导体科技(广东)有限公司 | Power modulation detection circuit, power topology structure and power modulation method |
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| CN110386007A (en) * | 2019-07-23 | 2019-10-29 | 南京信息工程大学 | A kind of method of electric car and electric bicycle charge and discharge spontaneous combustion protective device and spontaneous combustion protective device processing digital signal |
| CN110386007B (en) * | 2019-07-23 | 2023-10-13 | 南京信息工程大学 | Electric automobile and electric bicycle charge-discharge spontaneous combustion protection device and method for processing digital signals by spontaneous combustion protection device |
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| CN111355220B (en) * | 2020-03-02 | 2021-02-02 | 珠海格力电器股份有限公司 | Tripping control device, power supply system and tripping control method thereof |
| CN113671244A (en) * | 2021-08-06 | 2021-11-19 | 优利德科技(中国)股份有限公司 | Amplification module, detection sampling device and signal sampling amplification method |
| CN117175926A (en) * | 2023-11-03 | 2023-12-05 | 瑞森半导体科技(广东)有限公司 | Power modulation detection circuit, power topology structure and power modulation method |
| CN117175926B (en) * | 2023-11-03 | 2024-01-16 | 瑞森半导体科技(广东)有限公司 | Power modulation detection circuit, power topology structure and power modulation method |
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