CN206281942U - A kind of inductance open-circuit arc time detection circuit - Google Patents
A kind of inductance open-circuit arc time detection circuit Download PDFInfo
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- CN206281942U CN206281942U CN201621477617.3U CN201621477617U CN206281942U CN 206281942 U CN206281942 U CN 206281942U CN 201621477617 U CN201621477617 U CN 201621477617U CN 206281942 U CN206281942 U CN 206281942U
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Abstract
The utility model discloses a kind of inductance open-circuit arc time detection circuit, its circuit includes that the voltage signal processing circuit being sequentially connected, split-phase delay circuit, compare output circuit, arc duration test and display driver circuit and arc duration display circuit；Voltage signal processing circuit includes instrumentation amplifier U1, resistance R1, resistance R2, resistance R3 and resistance R4, split-phase delays the circuit to include resistance R5, resistance R6, resistance R7 and resistance R8 and electric capacity C1, compares output circuit including comparator U2, d type flip flop U3, resistance R10, resistance R11 and resistance R12.The utility model circuit structure is simple, reasonable in design, realizes convenient and low cost, stable and reliable in work, can fast and effectively detect the inductance open-circuit arc time, and accuracy of detection is high, applied widely, practical, with good application value.
Description
Technical field
The utility model belongs to inductance open-circuit arc time detection technology field, and in particular to during a kind of inductance open-circuit arc
Between detect circuit.
Background technology
Safety spark experimental rig is the basic equipment for studying circuit essential safety performance, according to what is obtained on the apparatus
The various curves of lighting that result of the test is drawn are the foundations for designing intrinsicallysafecircuit.Electricity is tested using safety spark experimental rig
Inductive circuit, its discharge time is exactly the duration that steady-state value of the circuital current from before disconnection decays to zero when igniting, and it is determined
Material, structure, the concentration of the feature of switch speed and circuit transitional processes and test gas in device electrode, temperature, pressure
Power etc..If discharge time and electrode gap voltage, the mathematical models of curent change rule can be set up, its volt-ampere is set up
Characteristic equation, discharge time is also just readily solved.But at present due to the complexity of actual discharge process, the mechanism that electric discharge is ignited is still
It is not fully aware of, it is impossible to set up complete theory and carry out quantitative description electric discharge ignition Process, and during the electric discharge of inductive circuit breaking arc
Between be an implicit function related to circuit parameter, it is thus possible to accurate measurement inductive circuit breaking arc discharge time turns into asks
The key of topic.
The research method to discharge time has at present：1. using the method for Mathematical Modeling, by setting up inductance breaking arc
The characteristics of Mathematical Modeling of electric discharge according to current attenuation during inductance disjunction is zero, calculate the electric discharge of inductance breaking arc when
Between；2. computer method measured directly is used, its main operational principle is that discharge pulse number is counted using counter
Number, and then discharge period when determining that inductive circuit disconnects.Employing mode method 1., advantage is simple, is easy to calculate.
But after being disconnected due to inductive circuit, actual Current Voltage Changing Pattern is nonlinear, therefore it has certain error.Adopt
With mode method 2., its operation principle is simple, using convenient, but due to several factors be likely to result in two break sparks it
Between time interval have error so as to cause the deviation of counting.
Utility model content
Technical problem to be solved in the utility model is for above-mentioned deficiency of the prior art, there is provided a kind of inductance
Open-circuit arc time detection circuit, its circuit structure is simple, reasonable in design, realizes convenient and low cost, stable and reliable in work, energy
Enough fast and effectively to detect the inductance open-circuit arc time, accuracy of detection is high, applied widely, practical, is pushed away with good
Wide application value.
In order to solve the above technical problems, the technical solution adopted in the utility model is：A kind of inductance open-circuit arc time inspection
Slowdown monitoring circuit, it is characterised in that：Delay circuit including the voltage signal processing circuit that is sequentially connected, split-phase, compare output circuit, electricity
Arc time test and display driver circuit and arc duration display circuit；
The voltage signal processing circuit includes instrumentation amplifier U1, resistance R1, resistance R2, resistance R3 and resistance R4, institute
The one end for stating resistance R1 is the sample point cathode voltage input VIN+ of voltage signal processing circuit, and one end of the resistance R3 is
The sample point cathode voltage input VIN- of voltage signal processing circuit, resistance R1 and electricity that sample point cathode voltage passes through series connection
The resistor voltage divider network that resistance R2 is constituted is connected to ground, the connection end of the resistance R1 and resistance R2 and the same phase of instrumentation amplifier U1
Input is connected, and sample point cathode voltage is connected to ground by the resistor voltage divider network that the resistance R3 and resistance R4 that connect are constituted,
The connection end of the resistance R3 and resistance R4 is connected with the inverting input of instrumentation amplifier U1；
The split-phase delay circuit include electric capacity C1, the first proportion resistor network being made up of resistance R5 and resistance R7, with
And the second proportion resistor network being made up of resistance R6 and resistance R8；The resistance of the resistance R5, the resistance of resistance R6, resistance R7
Resistance and the resistance of resistance R8 meet relational expressionOne end of the resistance R5 and instrumentation amplifier U1
Output end connection, the other end of the resistance R5 is grounded by resistance R7, one end of the resistance R6 and instrumentation amplifier U1
Output end connection, the other end of the resistance R6 is grounded by resistance R8, one end of the electric capacity C1 and resistance R6 and resistance
The connection end connection of R8, the other end ground connection of the electric capacity C1；
The output circuit that compares includes comparator U2, d type flip flop U3, resistance R10, resistance R11 and resistance R12, described
The in-phase input end of comparator U2 is connected with the connection end of resistance R5 and resistance R7, inverting input and the electricity of the comparator U2
The connection end connection of R6 and resistance R8 is hindered, the output end of the comparator U2 passes through the output of resistance R10 and externally fed power supply
End VCC connections, the signal input part D and signal output part of the d type flip flop U3Connection, the clock letter of the d type flip flop U3
Number input CP is connected with comparator U2 output ends, the signal output part Q of the d type flip flop U3 by series connection resistance R11 and
Resistance R12 is grounded, and the connection end of the resistance R11 and resistance R12 is the output end OUT for comparing output circuit.
A kind of above-mentioned inductance open-circuit arc time detection circuit, it is characterised in that：The arc duration test and display
Drive circuit is single-chip microcomputer, and the arc duration display circuit is LCDs.
A kind of above-mentioned inductance open-circuit arc time detection circuit, it is characterised in that：The model of the single-chip microcomputer
STC89C51, the model LCD1602 of the LCDs, is connected to clock circuit, the clock circuit on the single-chip microcomputer
It is made up of electric capacity C2, electric capacity C3 and crystal oscillator Y1, one end of the crystal oscillator Y1 is connected and public with the 18th pin of the single-chip microcomputer
Electric capacity C2 is grounded, and the other end of the crystal oscillator Y1 is connected with the 19th pin of the single-chip microcomputer and public capacitance C3 is grounded；It is described
29th pin of single-chip microcomputer and the 40th pin are connected with the output end VCC1 of externally fed power supply, and the 20th of the single-chip microcomputer draws
Pin is grounded, and the 13rd pin of the single-chip microcomputer is connected with the output end OUT for comparing output circuit, the LCDs
6th pin, the 5th pin and the 4th pin the 32nd pin successively with the single-chip microcomputer, the 33rd pin and the 34th pin are connected, institute
The 1st pin and the 16th pin for stating LCDs are grounded, the 2nd pin of the LCDs and the 15th pin with outward
The output end VCC1 connections of portion's power supply, the 3rd pin of the LCDs is grounded by resistance R13.
A kind of above-mentioned inductance open-circuit arc time detection circuit, it is characterised in that：The model of the instrumentation amplifier U1
It is AD623.
A kind of above-mentioned inductance open-circuit arc time detection circuit, it is characterised in that：The model of the comparator U2
LM2903。
A kind of above-mentioned inductance open-circuit arc time detection circuit, it is characterised in that：The model of the d type flip flop U3
74HC75。
The utility model has advantages below compared with prior art：
1st, circuit structure of the present utility model is simple, reasonable in design, realizes convenient and low cost, stable and reliable in work.
2nd, the utility model compensate for mathematical model method and computer direct method of measurement measurement inductive circuit breaking arc is put
The deficiency of electric time, can directly display out measurement result in arc duration display circuit, and it is convenient to be provided to scientific research personnel.
3rd, the utility model is the detection electricity designed according to the Variation Features of inductive circuit breaking arc discharge voltage waveform
Road, the instrumentation amplifier of selection, comparator fast response time, the arc discharge time error for measuring is small, high precision.
4th, the utility model not only goes in the middle of actual spark-testing, can be applicable to various inductive electricity
In the inductance open-circuit arc electric discharge l-G simulation test of road, inductance open-circuit arc discharge wave just can be quickly extracted by means of simulation software
Shape, it is applied widely.
5th, it is of the present utility model practical, with good application value.
In sum, the utility model circuit structure is simple, reasonable in design, realizes convenient and low cost, and working stability can
Lean on, can fast and effectively detect the inductance open-circuit arc time, accuracy of detection is high, applied widely, practical, with good
Application value.
Below by drawings and Examples, the technical solution of the utility model is described in further detail.
Brief description of the drawings
Fig. 1 is schematic block circuit diagram of the present utility model.
Fig. 2 is circuit theory diagrams of the present utility model.
Fig. 3 is exemplary application map of the present utility model.
Description of reference numerals:
1-inductive circuit；2-voltage signal processing circuit；3-split-phase delays circuit；
4-compare output circuit；5-arc duration is tested and display driver circuit；
6-arc duration display circuit.
Specific embodiment
As shown in figure 1, inductance open-circuit arc time detection circuit of the present utility model, including the voltage signal being sequentially connected
Process circuit 2, split-phase delays circuit 3, compare the test of output circuit 4, arc duration and display driver circuit 5 and arc duration are aobvious
Show circuit 6；
As shown in Fig. 2 the voltage signal processing circuit 2 includes instrumentation amplifier U1, resistance R1, resistance R2, resistance R3
With resistance R4, one end of the resistance R1 is the sample point cathode voltage input VIN+ of voltage signal processing circuit 2, the electricity
The one end for hindering R3 is the sample point cathode voltage input VIN- of voltage signal processing circuit 2, and sample point cathode voltage is by string
The resistor voltage divider network that the resistance R1 and resistance R2 of connection are constituted is connected to ground, and connection end and the instrument of the resistance R1 and resistance R2 are used
The in-phase input end connection of amplifier U1, the divider resistance that sample point cathode voltage is made up of the resistance R3 and resistance R4 that connect
To ground, the connection end of the resistance R3 and resistance R4 is connected network connection with the inverting input of instrumentation amplifier U1；
As shown in Fig. 2 the split-phase delay circuit 3 include electric capacity C1, the first ratio being made up of resistance R5 and resistance R7
Resistor network, and the second proportion resistor network being made up of resistance R6 and resistance R8；The resistance of the resistance R5, resistance R6
The resistance of resistance, the resistance of resistance R7 and resistance R8 meets relational expressionOne end of the resistance R5 with
The output end connection of instrumentation amplifier U1, the other end of the resistance R5 is grounded by resistance R7, one end of the resistance R6 and
The output end connection of instrumentation amplifier U1, the other end of the resistance R6 is grounded by resistance R8, one end of the electric capacity C1 and
The connection end connection of resistance R6 and resistance R8, the other end ground connection of the electric capacity C1；
As shown in Fig. 2 the output circuit 4 that compares includes comparator U2, d type flip flop U3, resistance R10, resistance R11 and electricity
Resistance R12, the in-phase input end of the comparator U2 is connected with the connection end of resistance R5 and resistance R7, and the comparator U2's is anti-phase
Input is connected with the connection end of resistance R6 and resistance R8, and the output end of the comparator U2 passes through resistance R10 and externally fed
The output end VCC connections of power supply, the signal input part D and signal output part of the d type flip flop U3Connection, the d type flip flop
The clock signal input terminal CP of U3 is connected with comparator U2 output ends, and the signal output part Q of the d type flip flop U3 is by series connection
Resistance R11 and resistance R12 is grounded, and the connection end of the resistance R11 and resistance R12 is the output end for comparing output circuit 4
OUT。
During specific implementation, the power end of the instrumentation amplifier U1 is connected with the output end VCC of externally fed power supply, described
The earth terminal ground connection of instrumentation amplifier U1；The power end of the comparator U2 is connected with the output end VCC of externally fed power supply, institute
State the earth terminal ground connection of comparator U2.The voltage of the output end VCC outputs of the externally fed power supply is 5V.
In the present embodiment, the arc duration test and display driver circuit 5 are single-chip microcomputer, the arc duration display electricity
Road 7 is LCDs.
In the present embodiment, as shown in Fig. 2 the model STC89C51 of the single-chip microcomputer, the model of the LCDs
It is LCD1602, clock circuit is connected on the single-chip microcomputer, the clock circuit is made up of electric capacity C2, electric capacity C3 and crystal oscillator Y1, institute
State one end of crystal oscillator Y1 be connected with the 18th pin of the single-chip microcomputer and public capacitance C2 be grounded, the other end of the crystal oscillator Y1 with
The 19th pin connection of the single-chip microcomputer and public capacitance C3 ground connection；29th pin of the single-chip microcomputer and the 40th pin with outward
The output end VCC1 connections of portion's power supply, the 20th pin ground connection of the single-chip microcomputer, the 13rd pin of the single-chip microcomputer and institute
State the output end OUT connections for comparing output circuit 4, the 6th pin of the LCDs, the 5th pin and the 4th pin successively with
The connection of 32nd pin of the single-chip microcomputer, the 33rd pin and the 34th pin, the 1st pin of the LCDs and the 16th pin
It is grounded, the 2nd pin of the LCDs and the 15th pin are connected with the output end VCC1 of externally fed power supply, described
3rd pin of LCDs is grounded by resistance R13.
During specific implementation, the voltage of the output end VCC1 outputs of the externally fed power supply is 5V.
In the present embodiment, the model AD623 of the instrumentation amplifier U1.The instrumentation amplifier U1's of model AD623
Pin 2 is inverting input, and pin 3 is in-phase input end, and pin 4 is earth terminal, and pin 7 is power end, and pin 6 is output
End.
In the present embodiment, the model LM2903 of the comparator U2.
In the present embodiment, the model 74HC75 of the d type flip flop U3.
The method detected to the inductance open-circuit arc time using the utility model, is comprised the following steps：
Step one, detection circuit connection：The sample point positive pole of the inductive circuit 1 of detection inductance open-circuit arc time will be needed
It is connected with the sample point cathode voltage input VIN+ of voltage signal processing circuit 2, it would be desirable to detect the inductance open-circuit arc time
The sample point negative pole of inductive circuit 1 be connected with the sample point cathode voltage input VIN- of voltage signal processing circuit 2；And will
Safety spark experimental rig G be connected on the inductive circuit 1 for needing to detect the inductance open-circuit arc time sample point positive pole and negative pole it
Between；
Step 2, voltage signal treatment：In the course of work of inductive circuit 1, voltage signal processing circuit 2 is to inductive circuit 1
Sample point positive pole and cathode voltage double-width grinding differential signal be amplified treatment after, be converted into single-ended voltage signal output
Delay circuit 3 to split-phase；
Step 3, inductance open-circuit arc time detecting, detailed process is：
When two electrodes of safety spark experimental rig G are in closure state, the normal work of inductive circuit 1, now, electricity
Induction charging energy storage in inductive circuit 1, when inductive current reaches maximum, sample point positive pole and the sampling of inductive circuit 1
Voltage between point negative pole is zero, and the output voltage of instrumentation amplifier U1 is also zero in voltage signal processing circuit 2；Voltage signal
The voltage of the output of process circuit 2 is divided into two-way, delays the first proportion resistor network partial pressure in circuit 3 by the split-phase all the way
Export the in-phase input end for comparing comparator U2 in output circuit 4 afterwards, another road delays in circuit 3 by the split-phase
The inverting input for comparing comparator U2 in output circuit 4 is exported after two proportion resistor network partial pressures, due to the resistance of resistance R5
The resistance of value, the resistance of resistance R6, the resistance of resistance R7 and resistance R8 meets relational expressionTherefore compare
The voltage of the in-phase input end of device U2 is less than the voltage of its inverting input, comparator U2 output low levels so that d type flip flop U3
In latch mode, d type flip flop U3 does not detect the voltage signal of change, exports low level；
When explosibility test is opened and closed using safety spark experimental rig G, two electricity of safety spark experimental rig G
Pole is initially separated by closing, and because the loop current of inductive circuit 1 can not be mutated, causes open circuit point that voltage jump, inductance occur
Circuit 1 starts to produce arc discharge；The voltage of the output of voltage signal processing circuit 2 is divided into two-way, prolongs by the split-phase all the way
The in-phase input end for comparing comparator U2 in output circuit 4 is exported after the first proportion resistor network partial pressure in slow circuit 3, separately
Exported after the split-phase delays the second proportion resistor network partial pressure in circuit 3 all the way and compared in comparing output circuit 4
The inverting input of device U2, although the resistance of the resistance of resistance R5, the resistance of resistance R6, the resistance of resistance R7 and resistance R8 meets
Relational expressionBut delay the voltage of output after the second proportion resistor network partial pressure due to electric capacity C1
Change so that the voltage of the in-phase input end of comparator U2 more than its inverting input voltage, comparator U2 outputs electricity high
It is flat, due to d type flip flop U3 for rising edge is triggered, therefore, d type flip flop U3 output high level；The high level warp of d type flip flop U3 outputs
Exported to arc duration test and display driver circuit 5 after crossing resistance R11 and resistance R12 partial pressures, when arc duration is tested and aobvious
When showing that drive circuit 5 detects high level arrival, start timing；
Propulsion over time, the degree of two electrode separations of safety spark experimental rig G gradually increases, arc current
Approximately linear is decayed, and now the arc voltage at open circuit slowly rises, and the voltage of the output of voltage signal processing circuit 2 is divided into two
Road, exports after the split-phase delays the first proportion resistor network partial pressure in circuit 3 compare in comparing output circuit 4 all the way
Compared with the in-phase input end of device U2, another road exports after the split-phase delays the second proportion resistor network partial pressure in circuit 3
To the inverting input for comparing comparator U2 in output circuit 4, due to the resistance of resistance R5, the resistance of resistance R6, resistance R7
The resistance of resistance and resistance R8 meets relational expressionTherefore the voltage of the in-phase input end of comparator U2 is small
In the voltage of its inverting input, comparator U2 outputs maintain low level, and d type flip flop U3 outputs keep high level；
As two electrode distances of safety spark experimental rig G are further increased, arc current drops to suddenly zero, this
When, two electrodes of safety spark experimental rig G are completely separated, and inductive circuit 1 generates a voltage signal for mutation again,
The voltage of the output of voltage signal processing circuit 2 is divided into two-way, delays the first proportion resistor in circuit 3 by the split-phase all the way
The in-phase input end for comparing comparator U2 in output circuit 4 is exported after network partial pressure, another road delays electricity by the split-phase
The inverting input for comparing comparator U2 in output circuit 4 is exported after the second proportion resistor network partial pressure in road 3, although electricity
The resistance for hindering resistance, the resistance of resistance R6, the resistance of resistance R7 and the resistance R8 of R5 meets relational expression
But because electric capacity C1 has delayed the change of voltage that exports after the second proportion resistor network partial pressure so that comparator U2 is again
Output high level, d type flip flop U3 detects the voltage signal that this changes from low to high, and the upset of output state logic is low electricity
Put down, it is necessary to detect that the arc discharge of inductive circuit 1 of inductance open-circuit arc time terminates；D type flip flop U3 output logic state upsets
When, produce a trailing edge to export to arc duration test and display driver circuit 5, arc duration is tested and display driver circuit
5 stop timing, and the time that timing is obtained is designated as the inductance open-circuit arc time by arc duration test and display driver circuit 5, and
Export and shown to arc duration display circuit 6.
For example, as shown in Figure 3, it is necessary to detect the inductive circuit 1 of inductance open-circuit arc time by direct voltage source Vi, inductance
L and current-limiting resistance RL concatenations are constituted, and one end of the inductance L is connected with direct voltage source Vi cathode output ends, the inductance L's
The other end is the sample point positive pole of inductive circuit 1, and one end and the direct voltage source Vi cathode output ends of the current-limiting resistance RL connect
Connect and be grounded, the other end of the current-limiting resistance RL is the sample point negative pole of inductive circuit 1.
When two electrodes of safety spark experimental rig G are in closure state, the normal work of inductive circuit 1, now, electricity
Sense L charging energy-storings, comparator U2 output low levels so that d type flip flop U3 is in latch mode, and d type flip flop U3 is not detected
The voltage signal of change, exports low level；
When explosibility test is opened and closed using safety spark experimental rig G, two electricity of safety spark experimental rig G
Pole is initially separated by closing, and the resistance in inductive circuit 1 increases suddenly, because the loop current of inductive circuit 1 can not be mutated, is caused
Make breakpoint that voltage jump to occur, inductive circuit 1 starts to produce arc discharge；Comparator U2 exports high level, d type flip flop U3 inspections
The level of change is measured, high level is exported, inductive circuit 1 starts arc discharge；The high level of d type flip flop U3 outputs is by resistance
Exported after R11 and resistance R12 partial pressures to arc duration test and display driver circuit, when arc duration is tested and display driving electricity
When road detects high level arrival, start timing；
Propulsion over time, the degree of two electrode separations of safety spark experimental rig G gradually increases, arc current
Approximately linear is decayed, and now the arc voltage at disjunction slowly rises, and comparator U2 outputs maintain low level, and d type flip flop U3 is defeated
Go out to keep high level；
As two electrode distances of safety spark experimental rig G are further increased, arc current drops to suddenly zero, this
When, two electrodes of safety spark experimental rig G are completely separated, and inductive circuit 1 generates a voltage signal for mutation again,
Comparator U2 exports high level again, and d type flip flop U3 detects the voltage signal that this changes from low to high, output state logic
It is low level to overturn, and the arc discharge of inductive circuit 1 terminates；When d type flip flop U3 output logic states overturn, a trailing edge is produced
Export to arc duration test and display driver circuit, arc duration test and display driver circuit stop timing, arc duration
The time that timing is obtained is designated as the inductance open-circuit arc time by test and display driver circuit, and exports electric to arc duration display
Road is shown.
The above, is only preferred embodiment of the present utility model, and not the utility model is imposed any restrictions, every
Any simple modification, change and the equivalent structure change made to above example according to the utility model technical spirit, still
Belong in the protection domain of technical solutions of the utility model.
Claims (6)
1. a kind of inductance open-circuit arc time detection circuit, it is characterised in that：Including the voltage signal processing circuit being sequentially connected
(2), split-phase delays circuit (3), compares output circuit (4), arc duration test and display driver circuit (5) and arc duration and show
Show circuit (6)；
The voltage signal processing circuit (2) includes instrumentation amplifier U1, resistance R1, resistance R2, resistance R3 and resistance R4, described
One end of resistance R1 is the sample point cathode voltage input VIN+ of voltage signal processing circuit (2), one end of the resistance R3
It is the sample point cathode voltage input VIN- of voltage signal processing circuit (2), the resistance that sample point cathode voltage passes through series connection
The resistor voltage divider network that R1 and resistance R2 is constituted is connected to ground, connection end and the instrumentation amplifier U1 of the resistance R1 and resistance R2
In-phase input end connection, sample point cathode voltage by connect resistance R3 and resistance R4 constitute resistor voltage divider network connect
To ground, the connection end of the resistance R3 and resistance R4 is connected with the inverting input of instrumentation amplifier U1；
The split-phase delays the circuit (3) to include electric capacity C1, the first proportion resistor network being made up of resistance R5 and resistance R7, and
The second proportion resistor network being made up of resistance R6 and resistance R8；The resistance of the resistance R5, the resistance of resistance R6, resistance R7
The resistance of resistance and resistance R8 meets relational expressionOne end of the resistance R5 is with instrumentation amplifier U1's
Output end is connected, and the other end of the resistance R5 is grounded by resistance R7, and one end of the resistance R6 is with instrumentation amplifier U1's
Output end is connected, and the other end of the resistance R6 is grounded by resistance R8, one end and the resistance R6 and resistance R8 of the electric capacity C1
Connection end connection, the electric capacity C1 the other end ground connection；
The output circuit (4) that compares includes comparator U2, d type flip flop U3, resistance R10, resistance R11 and resistance R12, the ratio
In-phase input end compared with device U2 is connected with the connection end of resistance R5 and resistance R7, the inverting input and resistance of the comparator U2
The connection end connection of R6 and resistance R8, the output end of the comparator U2 is by resistance R10 and the output end of externally fed power supply
VCC is connected, the signal input part D and signal output part of the d type flip flop U3Connection, the clock signal of the d type flip flop U3
Input CP is connected with comparator U2 output ends, and the signal output part Q of the d type flip flop U3 passes through the resistance R11 and electricity of series connection
Resistance R12 ground connection, the connection end of the resistance R11 and resistance R12 is the output end OUT for comparing output circuit (4).
2. according to a kind of inductance open-circuit arc time detection circuit described in claim 1, it is characterised in that：The arc duration
Test and display driver circuit (5) are single-chip microcomputer, and the arc duration display circuit (6) is LCDs.
3. according to a kind of inductance open-circuit arc time detection circuit described in claim 2, it is characterised in that：The single-chip microcomputer
Model STC89C51, the model LCD1602 of the LCDs, is connected to clock circuit, when described on the single-chip microcomputer
Clock electricity routing capacitance C2, electric capacity C3 and crystal oscillator Y1 compositions, one end of the crystal oscillator Y1 is connected with the 18th pin of the single-chip microcomputer
And public capacitance C2 is grounded, the other end of the crystal oscillator Y1 is connected with the 19th pin of the single-chip microcomputer and public capacitance C3 connects
Ground；29th pin of the single-chip microcomputer and the 40th pin are connected with the output end VCC1 of externally fed power supply, the single-chip microcomputer
The 20th pin ground connection, the 13rd pin of the single-chip microcomputer is connected with the output end OUT for comparing output circuit (4), described
6th pin of LCDs, the 5th pin and the 4th pin successively with the 32nd pin, the 33rd pin and the 34th of the single-chip microcomputer
Pin is connected, and the 1st pin of the LCDs and the 16th pin be grounded, the 2nd pin of the LCDs and the
15 pins are connected with the output end VCC1 of externally fed power supply, and the 3rd pin of the LCDs is connect by resistance R13
Ground.
4. according to a kind of inductance open-circuit arc time detection circuit described in claim 1, it is characterised in that：The instrument amplifies
The model AD623 of device U1.
5. according to a kind of inductance open-circuit arc time detection circuit described in claim 1, it is characterised in that：The comparator U2
Model LM2903.
6. according to a kind of inductance open-circuit arc time detection circuit described in claim 1, it is characterised in that：The d type flip flop
The model 74HC75 of U3.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621477617.3U CN206281942U (en) | 2016-12-30 | 2016-12-30 | A kind of inductance open-circuit arc time detection circuit |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621477617.3U CN206281942U (en) | 2016-12-30 | 2016-12-30 | A kind of inductance open-circuit arc time detection circuit |
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| CN206281942U true CN206281942U (en) | 2017-06-27 |
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| CN201621477617.3U Expired - Fee Related CN206281942U (en) | 2016-12-30 | 2016-12-30 | A kind of inductance open-circuit arc time detection circuit |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106646199A (en) * | 2016-12-30 | 2017-05-10 | 西安科技大学 | Circuit and method for detecting breaking arc discharging time of inductive circuit |
| CN111551873A (en) * | 2020-06-15 | 2020-08-18 | 浙江中医药大学附属第三医院 | Open circuit detection method for electrical stimulation output of percutaneous/percutaneous needle |
-
2016
- 2016-12-30 CN CN201621477617.3U patent/CN206281942U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106646199A (en) * | 2016-12-30 | 2017-05-10 | 西安科技大学 | Circuit and method for detecting breaking arc discharging time of inductive circuit |
| CN106646199B (en) * | 2016-12-30 | 2019-08-09 | 西安科技大学 | Inductive circuit breaking arc discharge time detection circuit and method |
| CN111551873A (en) * | 2020-06-15 | 2020-08-18 | 浙江中医药大学附属第三医院 | Open circuit detection method for electrical stimulation output of percutaneous/percutaneous needle |
| CN111551873B (en) * | 2020-06-15 | 2022-06-28 | 浙江中医药大学附属第三医院 | Open circuit detection method for electrical stimulation output of percutaneous/percutaneous needle |
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