CN106019040A - Optical-coupler electrical performance detection device - Google Patents
Optical-coupler electrical performance detection device Download PDFInfo
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- CN106019040A CN106019040A CN201610658781.2A CN201610658781A CN106019040A CN 106019040 A CN106019040 A CN 106019040A CN 201610658781 A CN201610658781 A CN 201610658781A CN 106019040 A CN106019040 A CN 106019040A
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- 238000001514 detection method Methods 0.000 title claims abstract description 27
- 238000012360 testing method Methods 0.000 claims abstract description 47
- 230000000694 effects Effects 0.000 claims abstract description 11
- 230000005669 field effect Effects 0.000 claims description 86
- 238000002955 isolation Methods 0.000 claims description 20
- 238000009413 insulation Methods 0.000 claims description 14
- 238000005070 sampling Methods 0.000 claims description 12
- 230000005611 electricity Effects 0.000 claims description 11
- 230000001276 controlling effect Effects 0.000 claims description 10
- 230000008878 coupling Effects 0.000 claims description 10
- 238000010168 coupling process Methods 0.000 claims description 10
- 238000005859 coupling reaction Methods 0.000 claims description 10
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 claims description 3
- 230000015556 catabolic process Effects 0.000 claims description 3
- 229910052744 lithium Inorganic materials 0.000 claims description 3
- 230000002093 peripheral effect Effects 0.000 claims description 3
- 230000001105 regulatory effect Effects 0.000 claims description 2
- 230000003287 optical effect Effects 0.000 abstract 2
- 238000000034 method Methods 0.000 description 3
- 239000004065 semiconductor Substances 0.000 description 3
- 206010034133 Pathogen resistance Diseases 0.000 description 2
- 230000005540 biological transmission Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 210000000056 organ Anatomy 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 1
- 239000004973 liquid crystal related substance Substances 0.000 description 1
- 230000001151 other effect Effects 0.000 description 1
- 230000000087 stabilizing effect Effects 0.000 description 1
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
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Abstract
The embodiment of the invention provides an optical-coupler electrical performance detection device, and belongs to the technical field of automatic detection. The optical-coupler electrical performance detection device comprises a main control module, a trigger module, a display module and an optical-coupler test module. The trigger module, the display module and the optical-coupler test module are connected to the main control module. The trigger module is used for generating a trigger signal under the effect of external operation and sending the trigger signal to the main control module; the main control module is used for controlling the optical-coupler test module according to the received trigger signal for testing; the optical-coupler test module is used for detecting the electrical performance parameter of a detected optical coupler and sending the detected electrical performance parameter to the display module for displaying. By means of the optical-coupler electrical performance detection device, an automatic test for the optical coupler can be achieved, and the accuracy and the efficiency of a test are effectively improved.
Description
Technical field
The present invention relates to test technique automatic field, electric in particular to a kind of optocoupler
Device for detecting performance.
Background technology
Optocoupler is the device carrying out transmitting telecommunication number with light for medium, is widely used in digital circuit
In, optocoupler is broadly divided into luminous organ and light-receiving device.When input power up signal, luminous organ sends
Light, light-receiving device then produces photoelectric current, and flows out from receiving terminal after receiving light, thus real
The conversion of existing " electrical-optical-electrical ".Most important for the detection of optocoupler electric property.
In the implementation process of prior art, at least face problems with: the electric property of optocoupler
Index can only the most manually detect, it is impossible to has disposably been detected by all electricity function indexs；
When detecting one by one, need the most manually to go regulation input voltage to reach testing conditions, exist
Personal error；One optocoupler is when the detection completing a set of electricity function index needs to expend
Long more than five minutes, efficiency is low.
Summary of the invention
The invention provides a kind of optocoupler electric property detection device, it is intended to realize to optocoupler from
Dynamicization is tested, and is effectively improved the accuracy and efficiency of test.
A kind of optocoupler electric property detection device that the embodiment of the present invention provides, including master control mould
Block, trigger module, display module and optocoupler test module, described trigger module, display module
It is connected to described main control module with optocoupler test module；
Wherein, described trigger module triggers signal also for producing under the effect of peripheral operation
It is sent to described main control module；
Described main control module is surveyed for controlling described optocoupler according to the described triggering signal received
Die trial block is tested；
Described optocoupler test module is for detecting the classical insulation of tested optocoupler, and will examine
The classical insulation measured is sent to described display module and shows；Wherein, described optocoupler
Test module includes that voltage forward output circuit, reverse leakage current output circuit, reception electric current are adopted
Sample circuit and constant-current source circuit, described voltage forward output circuit, reverse leakage current output circuit,
Receive current sampling circuit and constant-current source circuit is connected to described main control module and by light-metering
Coupling；Described classical insulation includes the forward voltage drop of described tested optocoupler, saturation voltage drop, anti-
To electric current, receive electric current and breakdown reverse voltage.
Preferably, described voltage forward output circuit includes field effect transistor (Q1) and field effect
Pipe (Q22), described field effect transistor (Q1) is by audion (T1) and described main control module
Connect so that described main control module is come by the on or off controlling this audion (T1)
Drive field effect transistor (Q1) on or off；The colelctor electrode of described audion (T1) passes through
Resistance (R11) is connected with voltage source (VCC), base stage is connected to by resistance (R12)
Described main control module, grounded emitter；The grid of described field effect transistor (Q1) is connected to institute
State the colelctor electrode of audion (T1), source electrode is connected to described voltage source (VCC), drain electrode connects
It is connected to first transmitting terminal (OP1) of described tested optocoupler；Described field effect transistor (Q22) is passed through
Audion (T21) is connected with described main control module so that described main control module should by control
The on or off of audion (T21) drives field effect transistor (Q22) on or off；
The grid of described field effect transistor (Q22) be connected to described audion (T21) colelctor electrode,
Source electrode is connected to second transmitting terminal (OP2) of described tested optocoupler, drain electrode by being connected in series
Resistance (R25) and resistance (R26) ground connection；The colelctor electrode of described audion (T21) leads to
Cross resistance (R23) and be connected to described voltage source (VCC), base stage by resistance (R24) even
It is connected to described main control module, grounded emitter.
Preferably, described reverse leakage current output circuit includes field effect transistor (Q2) and field effect
(Q11) should be managed；Described field effect transistor (Q2) is by audion (T2) and described master control mould
Block connects so that described main control module is by controlling the on or off of this audion (T2)
Drive field effect transistor (Q2) on or off；The base stage of described audion (T2) is passed through
Resistance (R21) is connected to described main control module, colelctor electrode is connected to by resistance (R22)
Described voltage source (VCC), grounded emitter；The grid of described field effect transistor (Q2) connects
Colelctor electrode, source electrode in described audion (T2) are connected to described voltage source (VCC), leakage
Pole is connected to second transmitting terminal (OP2) of described tested optocoupler；Described field effect transistor (Q11)
Grid be connected to described main control module, drain electrode is connected to the first transmitting terminal of described tested optocoupler
(OP1), source electrode is by the resistance (R13) being connected in series and resistance (R14) ground connection.
Preferably, described reception current sampling circuit include resistance (R31), resistance (R32),
Resistance (R33) and resistance (R34), described resistance (R31), resistance (R32), resistance
(R33) and resistance (R34) is in parallel successively, described resistance (R31), resistance (R32),
One end of resistance (R33) and resistance (R34) is connected to the first of described tested optocoupler
Receiving terminal (OP3), other end ground connection；Described main control module pass through described in the electricity that is connected in parallel
Resistance (R31), resistance (R32), resistance (R33) and resistance (R34) are with described by light-metering
First receiving terminal (OP3) of coupling connects, and carries out with the arrival current to described tested optocoupler
Sampling.
Preferably, described constant-current source circuit include audion (T0), Zener diode (CT0),
Field effect transistor (Q01) and field effect transistor (Q02)；The base stage of described audion (T0) is passed through
Resistance (R01) is connected to described voltage source (VCC), colelctor electrode is connected to described by light-metering
Second transmitting terminal (OP2) of coupling, emitter stage are connected to described Zener diode (CT0)；Institute
State that the grid of field effect transistor (Q01) is connected to described main control module, source ground, drain electrode are led to
Resistance (R02) and the resistance (R03) of crossing series connection are connected to sending out of described audion (T0)
Emitter-base bandgap grading；The grid of described field effect transistor (Q02) be connected to described main control module, source ground,
Drain electrode is connected to the emitter stage of described audion (T0) by resistance (R04)；Described master control
Module exports the second transmitting terminal of an electric current extremely described tested optocoupler by this constant-current source circuit
(OP2) as transmitting terminal electric current, and according to described arrival current and the ratio of transmitting terminal electric current
It is worth to described current transfer ratio.
Preferably, described voltage source (VCC) is lithium battery, Switching Power Supply or linear power supply.
Preferably, described main control module is also associated with current switching module, described current switching mould
Block adjusts the electricity of described constant-current source circuit output for the instruction sent according to described main control module
Stream size.
Preferably, described current switching module includes digital regulation resistance and switch controller, described
Main control module is connected to described digital regulation resistance, and described digital regulation resistance is connected to described switching control
Device processed, described switch controller is for regulating the resistance value of described digital regulation resistance, thus regulates
The size of current of described constant-current source circuit output.
Preferably, described switch controller includes relay isolation switching device, light-coupled isolation switching
Device and audion isolation switching device, described relay isolation switching device, light-coupled isolation switch and
Audion isolation switching device is connected to described digital regulation resistance.
The embodiment of the present invention provide a kind of optocoupler electric property detection device, by trigger module,
Display module and optocoupler test module are connected to main control module so that main control module is according to trigger mode
The triggering signal that block produces controls optocoupler test module and carries out automatic test, optocoupler test module
The classical insulation detected being sent to display module show, it is right to be so capable of
The automatic test of optocoupler, and it is effectively improved the accuracy and efficiency of test.
Accompanying drawing explanation
In order to be illustrated more clearly that the technical scheme of the embodiment of the present invention, below will be in embodiment
The required accompanying drawing used is briefly described, it will be appreciated that the following drawings illustrate only this
Some bright embodiment, therefore should not be viewed as the restriction to scope, common for this area
From the point of view of technical staff, on the premise of not paying creative work, it is also possible to according to these accompanying drawings
Obtain other relevant accompanying drawings.
Fig. 1 is the knot of a kind of optocoupler electric property detection device that embodiment of the present invention provides
Structure block diagram.
Fig. 2 is the electricity of a kind of optocoupler electric property detection device that embodiment of the present invention provides
Road schematic diagram.
Figure acceptance of the bid note is respectively as follows:
Optocoupler electric property detection device 100, tested optocoupler 200；
Main control module 101, optocoupler test module 102, trigger module 103, display module 104,
Current switching module 105；
Voltage forward output circuit 201, reverse leakage current output circuit 202, receive electric current and adopt
Sample circuit 203, constant-current source circuit 204.
Detailed description of the invention
For making the purpose of the embodiment of the present invention, technical scheme and advantage clearer, below will knot
Close the accompanying drawing in the embodiment of the present invention, the technical scheme in the embodiment of the present invention is carried out clear,
Be fully described by, it is clear that described embodiment be a part of embodiment of the present invention rather than
Whole embodiments.Based on the embodiment in the present invention, those of ordinary skill in the art are not having
Make the every other embodiment obtained under creative work premise, broadly fall into present invention protection
Scope.
It should also be noted that similar label and letter expression similar terms in following accompanying drawing, therefore,
The most a certain Xiang Yi accompanying drawing is defined, then need not it is carried out in accompanying drawing subsequently
Definition and explanation further.Meanwhile, in describing the invention, term " first ", "
Two " etc. it is only used for distinguishing describing, and it is not intended that instruction or hint relative importance.
Embodiments provide a kind of optocoupler electric property detection device 100.Such as Fig. 1 institute
Showing, described optocoupler electric property detection device 100 can include that main control module 101, optocoupler are surveyed
Die trial block 102, trigger module 103 and display module 104.Described optocoupler test module 102,
Trigger module 103 and display module 104 are connected to described main control module 101.
Wherein, described trigger module 103 triggers letter for producing under the effect of peripheral operation
Number, and it is sent to described main control module 101.Described main control module 101 is used for receiving described touching
Signal, and test according to described triggering signal control described optocoupler test module 102.
Alternatively, described trigger module 103 includes mechanical key, when described mechanical key is pressed
Send to described main control module 101 and trigger signal, trigger described main control module 101 and start described
Optocoupler test module 102 carries out automatic test to tested optocoupler 200.
Described optocoupler test module 102 is described for detection under the effect of described triggering signal
The classical insulation of tested optocoupler 200, and the classical insulation detected is sent to institute
Stating main control module 101, described main control module 101 controls described display module 104 and shows described
Classical insulation.
In the present embodiment, described optocoupler test module 102 include voltage forward output circuit 201,
Reverse leakage current output circuit 202, reception current sampling circuit 203 and constant-current source circuit 204.
Described voltage forward output circuit 201, reverse leakage current output circuit 202, reception electric current are adopted
Sample circuit 203 and constant-current source circuit 204 are connected to described main control module 101 and by light-metering
Coupling 200.Described voltage forward output circuit 201, reverse leakage current output circuit 202, connect
Receive current sampling circuit 203 and constant-current source circuit 204 is able to detect that described tested optocoupler 200
Various different classical insulations.Described classical insulation mainly includes described tested optocoupler
Forward voltage drop, saturation voltage drop, reverse current, current transfer ratio and the breakdown reverse voltage of 200.
As in figure 2 it is shown, described voltage forward output circuit 201 is used for detecting described tested optocoupler
The forward voltage drop of 200, it can include field effect transistor Q1 and field effect transistor Q22.Described field
Effect pipe Q1 is connected with described main control module 101 by audion T1 so that described master control
Module 101 can drive field effect transistor Q1 by the on or off controlling this audion T1
On or off.Specifically, the grid of described field effect transistor Q1 and the current collection of audion T1
Pole connects, source electrode connects voltage source VCC, drain electrode is connected to the of described tested optocoupler 200
One transmitting terminal OP1.In the present embodiment, described audion T1 can be NPN type triode,
Described voltage source VCC is lithium battery or Switching Power Supply.The colelctor electrode of described audion T1 leads to
Cross resistance R11 connection voltage source VCC, base stage is connected to described master control mould by resistance R12
Block 101, grounded emitter.Described main control module 101 passes through resistance R12 to described audion
T1 sends control signal, and described audion T1 turns under the effect of described control signal or cuts
Only, then by this audion T1 corresponding control signal of transmission to described field effect transistor Q1,
To drive this field effect transistor Q1 on or off.In other embodiments, described audion T1
Can also omit, use described main control module 101 directly to drive this field effect transistor Q1.This reality
Execute in example, between main control module 101 and field effect transistor Q1, use audion T1, by three
Pole pipe T1 and the combination of field effect transistor Q1, can avoid this field effect transistor Q1 at main control module
Output voltage this effect when about 3V of main control module 101 occurs under the directly driving of 101
Should the situation of pipe Q1 state labile.Voltage source VCC is battery, Switching Power Supply or linear
Power supply.
Described field effect transistor Q22 is connected with described main control module 101 by audion T21,
Described main control module 101 can be driven by the on or off controlling this audion T21
Dynamic field effect transistor Q22 on or off.Specifically, the grid of described field effect transistor Q22 is even
Be connected to the colelctor electrode of described audion T21, source electrode is connected to the of described tested optocoupler 200
Two transmitting terminal OP2, drain electrode are by the resistance R25 being connected in series and resistance R26 ground connection.Institute
The colelctor electrode stating audion T21 is connected to described voltage source VCC, base stage by resistance R23
It is connected to described main control module 101, grounded emitter by resistance R24.Described main control module
101 send control signal by resistance R24 to described audion T21, to control described three poles
Pipe T21 on or off, then sends control signal by audion T21 and imitates to described field
Should pipe Q22, to control this field effect transistor Q22 on or off.In other embodiments, institute
State audion T21 can also omit, use described main control module 101 directly to drive this to imitate
Should pipe Q22.In the present embodiment, use between main control module 101 and field effect transistor Q22
Audion T21, by audion T21 and the combination of field effect transistor Q22, can avoid this
Effect pipe Q22 occurs the output of main control module 101 under the directly driving of main control module 101
Voltage is the situation of field effect transistor Q22 state labile when about 3V.Described main control module
101 can obtain the voltage signal between described resistance R25 and resistance R26.Explain in detail below
State the forward voltage drop being tested described tested optocoupler 200 by described forward voltage output circuit 201
Test philosophy.
First, described forward voltage drop is the first transmitting terminal OP1 and of described tested optocoupler 200
Pressure drop between two transmitting terminal OP2.When testing this forward voltage drop, described main control module 101
Sending control signal respectively drives described field to imitate to described audion T1 and audion T21 respectively
Should pipe Q1 and field effect transistor Q22 conducting so that the voltage signal of described voltage source VCC lead to
Cross described field effect transistor Q1 and be sent to the first transmitting terminal OP1 of described tested optocoupler 200, and
Exported by the second transmitting terminal OP2 of described tested optocoupler 200, then pass through field effect transistor
Q22 transmission carries out dividing potential drop to resistance R25 and R26, is finally surveyed by described main control module 101
The mode obtaining voltage division signal measures described forward voltage drop.Wherein, described resistance R25 and R26
For sampling resistor.In the present embodiment, when testing described forward voltage drop, described main control module
101 control signals being sent to audion T1 and audion T21 can be that high level can also
It is low level, with specific reference to audion T1 and the type decided of audion T21.This enforcement
In example, described first transmitting terminal OP1 refers to the anode of the light emitting diode of tested optocoupler 200
Wiring port, described second transmitting terminal OP2 refers to the cathode connection port of this light emitting diode.
Further regarding to Fig. 2, described reverse leakage current output circuit 202 includes field effect transistor
Q2 and field effect transistor Q11.Wherein, described field effect transistor Q2 passes through audion T2 with described
Main control module 101 connects so that described main control module 101 can be by controlling this audion T2
On or off drive field effect transistor Q2 on or off.Described field effect transistor Q2
Grid is connected to the colelctor electrode of described audion T2, source electrode is connected to described voltage source VCC,
Drain electrode is connected to the second transmitting terminal OP2 of described tested optocoupler 200.Described audion T2's
Base stage is connected to described main control module 101, colelctor electrode by resistance R22 by resistance R21
It is connected to described voltage source VCC, grounded emitter.Described main control module 101 passes through resistance
R21 sends control signal to described audion T2, to control audion T2 on or off,
Then control signal is sent by this audion T2, to control the conducting of described field effect transistor Q2
Or cut-off.In other embodiments, described audion T2 can also omit, and uses described master control
Module 101 directly drives this field effect transistor Q2.In the present embodiment, main control module 101 He
Audion T2 is used, by audion T2 and field effect transistor Q2 between field effect transistor Q2
Combination, can avoid this field effect transistor Q2 master control occur under the directly driving of main control module 101
The output voltage of module 101 is the situation of field effect transistor Q2 state labile when about 3V.
The grid of described field effect transistor Q11 is connected to described main control module 101, drain electrode is connected to described
First transmitting terminal OP1 of tested optocoupler 200, source electrode are by the resistance R13 connected and resistance
R14 ground connection.Described main control module 101 can send to described field effect transistor Q11 and control letter
Number, to control described field effect transistor Q11 on or off.Described main control module 101 also connects
It is connected between described resistance R13 and resistance R14 so that described main control module 101 can obtain
Take the voltage division signal between described resistance R13 and resistance R14.Illustrate described quilt in detail below
The test philosophy of the reverse current of light-metering coupling 200.
Described reverse current is that the second transmitting terminal OP2 of described tested optocoupler 200 flows to first
The electric current of transmitting terminal OP1.When testing this reverse current, described main control module 101 sends control
Signal processed gives described audion T2, drives described field effect transistor Q2 to lead by this audion T2
Lead to and simultaneously drive the conducting of field effect transistor Q11 so that the voltage signal of described voltage source VCC
The second transmitting terminal OP2 of described tested optocoupler 200 it is sent to by described field effect transistor Q2.
Meanwhile, main control module 101 control described constant-current source circuit 204 be also supplied with corresponding electric current to should
Second transmitting terminal OP2, and imitate by passing sequentially through described field after described first transmitting terminal OP1
Should pipe Q11, resistance R13 and resistance R14.Finally, by be connected to described resistance R13 and
Described main control module 101 between resistance R14 records described reverse current.Wherein, described
Resistance R13 and R14 is sampling resistor.In the present embodiment, when testing described reverse current,
It can be that high level can also that described main control module 101 is sent to the control signal of audion T2
It is low level, with specific reference to the type decided of audion T2.
In the present embodiment, when testing described forward voltage drop, except described field effect transistor Q1 and field
Outside effect pipe Q22 conducting, other field effect transistor is in cut-off state.Described in test
During reverse current, in addition to described field effect transistor Q2 and field effect transistor Q11 turn on, other
Effect pipe is in cut-off state.
Described current transfer ratio, refers to arrival current and the transmitting terminal of described tested optocoupler 200
The ratio of electric current.When testing this current transfer ratio, first, described main control module 101 controls described
Constant-current source circuit 204 exports an electric current (transmitting terminal electric current), described electric current from described by light-metering
First transmitting terminal OP1 of coupling 200 flows to the second transmitting terminal OP2.Then, described master control mould
It is to described audion T2 and described by this audion T2 driving that block 101 sends control signal
Field effect transistor Q2 turns on, and simultaneously drives the conducting of field effect transistor Q11.Described tested optocoupler
The second receiving terminal OP4 of 200 is connected to voltage source VCC, connecing of described tested optocoupler 200
The signal of telecommunication that voltage source VCC is exported by receiving end photosensitive semiconductor pipe passes through described first receiving terminal
Through being transferred to main control module 101 by described reception current sampling circuit 203 after OP3, connect
Receiving end electric current.Ratio according to arrival current Yu transmitting terminal electric current i.e. can get described electric current and passes
Defeated ratio.
Further, described reception current sampling circuit 203 can include resistance R31, resistance
R32, resistance R33 and resistance R34.Described resistance R31, resistance R32, resistance R33 and
Resistance R34 is connected in parallel successively.Described resistance R31, resistance R32, resistance R33 and electricity
One end after resistance R34 parallel connection is connected to the first receiving terminal OP1 of described tested optocoupler 200
With described main control module 101, other end ground connection.Wherein, described resistance R31, resistance R32,
Resistance R33 and resistance R34 can also substitute with single powerful resistance.Described by light-metering
First receiving terminal OP3 of coupling 200 be connected to described in be connected in parallel resistance R31, resistance R32,
Resistance R33 and resistance R34, the second receiving terminal OP4 are connected to described voltage source VCC.This
In embodiment, described first receiving terminal OP3 refers to the receiving terminal light of described tested optocoupler 200
The emitter stage Wiring port of sensitive semiconductor pipe, described second receiving terminal OP4 refers to described tested
The colelctor electrode Wiring port of the receiving terminal photosensitive semiconductor pipe of optocoupler 200.
Referring again to Fig. 2, described constant-current source circuit 204 includes audion T0, voltage stabilizing two pole
Pipe CT0, field effect transistor Q01 and field effect transistor Q02.Wherein, the base of described audion T0
Pole is connected to described voltage source VCC by resistance R01, colelctor electrode is connected to described by light-metering
Second transmitting terminal OP2 of coupling 200, emitter stage are connected to described Zener diode CT0.Described
Audion T0 is on or off under the effect of described second transmitting terminal OP2 output voltage.Institute
State that the grid of field effect transistor Q01 is connected to described main control module 101, source ground, drain electrode are led to
Cross the resistance R02 being connected in series and resistance R03 and be connected to the emitter stage of described audion T0.
The grid of described field effect transistor Q02 is connected to described main control module 101, source ground, drain electrode
The emitter stage of described audion T0 it is connected to by resistance R04.In the present embodiment, described electricity
The electric current that the resistance value of resistance R02, resistance R03 and resistance R04 exports according to described constant-current source
Size determines.Alternatively, described resistance R02, resistance R03 and resistance R04 can use number
Word potentiometer is replaced.Described main control module 101 is respectively to described field effect transistor Q01 and institute
State field effect transistor Q02 and send control signal, selectivity conducting described field effect transistor Q01, Q02
One of them, and then control described constant-current source circuit 204 exportable two kinds of different outputs electricity
Stream.Such as, described different output electric current can be 10mA or 5mA or other.
In the present embodiment, described main control module 101 is probably a kind of IC chip, has
The disposal ability of signal, the most miniature control unit (Micro Control Unit, MCU),
Single-chip microcomputer etc..Described voltage forward output circuit 201, reverse leakage current output circuit 202,
Receive current sampling circuit 203, constant-current source circuit 204 is connected with this main control module 101
Each element is connected respectively to the different of this main control module 101 and controls on port (port).
Further regarding to Fig. 1, described main control module 101 can also connect current switching module
105.Described current switching module 105 is for the instruction sent according to described main control module 101
Adjust the output electric current of described constant-current source circuit 204, such as described 10mA and 5mA it
Between switch.
Alternatively, described current switching module 105 includes digital regulation resistance and switch controller.
Described switch controller regulates the resistance value of described digital regulation resistance by digital control scheme.Described number
Word potentiometer have use flexibly, degree of regulation is high, contactless, low noise, be difficult to be stained,
Anti-vibration, anti-interference, volume is little and the feature such as life-span length.Wherein, described switch controller can
To include relay isolation switching device, light-coupled isolation switch and audion isolation switching device.Institute
State relay isolation switching device, light-coupled isolation switch and audion isolation switching device and be connected to institute
State digital regulation resistance.Described switch controller by described relay isolation switching device, optocoupler every
Switching isolation is realized with described digital regulation resistance from switch and audion isolation switching device.
Further, described display module 104 can be liquid crystal display, touch control display,
Charactron or other be arbitrarily displayed for the classical insulation of described tested optocoupler 200
Display device.
A kind of optocoupler electric property detection device 100 that the embodiment of the present invention provides, by trigger mode
103 pieces, display module 104 and optocoupler test module 102 are connected to main control module 101, make
Obtain main control module 101 and control optocoupler test module according to the triggering signal that trigger module 103 produces
102 carry out automatic test, and the classical insulation detected is sent out by optocoupler test module 102
Give display module 104 to show, be so capable of the automatic test to optocoupler, with
And it is effectively improved the accuracy and efficiency of test.
On the basis of foregoing circuit, the present embodiment is also associated with part auxiliary element and
Line, for ensureing the properly functioning of circuit, the use of these auxiliary elements and line belongs to
The circuit application habit of industry universal, does not repeats them here.
The described unit that illustrates as separating component can be or may not be and physically divide
Opening, the parts shown as unit can be or may not be physical location, the most permissible
It is positioned at a place, or can also be distributed on multiple NE.Can be according to reality
Need to select some or all of unit therein to realize the purpose of the present embodiment scheme.
It addition, each functional unit in each embodiment of the present invention can be integrated in a process
In unit, it is also possible to be that unit is individually physically present, it is also possible to two or more are single
Unit is integrated in a unit.
It should be noted that in this article, term " includes " or its any other variant meaning
Containing comprising of nonexcludability, so that include the article of a series of key element or equipment not
Only include those key elements, but also include other key elements being not expressly set out.The most more
In the case of restriction, statement " including ... " key element limited, it is not excluded that at bag
Include in the article of described key element or equipment and there is also other identical element.
The above, the only detailed description of the invention of the present invention, but protection scope of the present invention is also
Being not limited to this, any those familiar with the art is at the technology model that the invention discloses
In enclosing, change can be readily occurred in or replace, all should contain within protection scope of the present invention.
Therefore, protection scope of the present invention should described be as the criterion with scope of the claims.
Claims (9)
1. an optocoupler electric property detection device, it is characterised in that described optocoupler electrical resistance
Device can be detected and include main control module, trigger module, display module and optocoupler test module, institute
State trigger module, display module and optocoupler test module and be connected to described main control module；
Wherein, described trigger module triggers signal also for producing under the effect of peripheral operation
It is sent to described main control module；
Described main control module is surveyed for controlling described optocoupler according to the described triggering signal received
Die trial block is tested；
Described optocoupler test module is for detecting the classical insulation of tested optocoupler, and will examine
The classical insulation measured is sent to described display module and shows；Wherein, described optocoupler
Test module includes that voltage forward output circuit, reverse leakage current output circuit, reception electric current are adopted
Sample circuit and constant-current source circuit, described voltage forward output circuit, reverse leakage current output circuit,
Receive current sampling circuit and constant-current source circuit is connected to described main control module and by light-metering
Coupling；Described classical insulation includes the forward voltage drop of described tested optocoupler, saturation voltage drop, anti-
To electric current, current transfer ratio and breakdown reverse voltage.
Optocoupler electric property detection device the most according to claim 1, it is characterised in that
Described voltage forward output circuit includes field effect transistor (Q1) and field effect transistor (Q22), institute
State field effect transistor (Q1) to be connected with described main control module by audion (T1) so that institute
State main control module and drive field effect transistor by the on or off controlling this audion (T1)
(Q1) on or off；The colelctor electrode of described audion (T1) by resistance (R11) with
Voltage source (VCC) connect, base stage by resistance (R12) be connected to described main control module,
Grounded emitter；The grid of described field effect transistor (Q1) is connected to described audion (T1)
Colelctor electrode, source electrode be connected to described voltage source (VCC), drain electrode be connected to described by light-metering
First transmitting terminal (OP1) of coupling；Described field effect transistor (Q22) passes through audion (T21)
It is connected with described main control module so that described main control module is by controlling this audion (T21)
On or off drive field effect transistor (Q22) on or off；Described field effect transistor
(Q22) grid is connected to the colelctor electrode of described audion (T21), source electrode is connected to institute
State second transmitting terminal (OP2) of tested optocoupler, drain electrode by the resistance (R25) being connected in series
With resistance (R26) ground connection；The colelctor electrode of described audion (T21) passes through resistance (R23)
Be connected to described voltage source (VCC), base stage is connected to described master control by resistance (R24)
Module, grounded emitter.
Optocoupler electric property detection device the most according to claim 2, it is characterised in that
Described reverse leakage current output circuit includes field effect transistor (Q2) and field effect transistor (Q11)；
Described field effect transistor (Q2) is connected with described main control module by audion (T2) so that
Described main control module carrys out driving field effect by the on or off controlling this audion (T2)
Pipe (Q2) on or off；The base stage of described audion (T2) is by resistance (R21) even
Be connected to described main control module, colelctor electrode is connected to described voltage source by resistance (R22)
(VCC), grounded emitter；The grid of described field effect transistor (Q2) is connected to described three poles
The pipe colelctor electrode of (T2), source electrode are connected to described voltage source (VCC), drain electrode is connected to institute
State second transmitting terminal (OP2) of tested optocoupler；The grid of described field effect transistor (Q11) connects
In described main control module, drain electrode be connected to described tested optocoupler the first transmitting terminal (OP1),
Source electrode is by the resistance (R13) being connected in series and resistance (R14) ground connection.
Optocoupler electric property detection device the most according to claim 3, it is characterised in that
Described reception current sampling circuit includes resistance (R31), resistance (R32), resistance (R33)
With resistance (R34), described resistance (R31), resistance (R32), resistance (R33) and electricity
Resistance (R34) is in parallel successively, described resistance (R31), resistance (R32), resistance (R33)
With one end of resistance (R34) be connected to described tested optocoupler the first receiving terminal (OP3),
Other end ground connection；Described main control module pass through described in be connected in parallel resistance (R31), resistance
(R32), the first receiving terminal of resistance (R33) and resistance (R34) and described tested optocoupler
(OP3) connect, sample with the arrival current to described tested optocoupler.
Optocoupler electric property detection device the most according to claim 4, it is characterised in that
Described constant-current source circuit includes audion (T0), Zener diode (CT0), field effect transistor
And field effect transistor (Q02) (Q01)；The base stage of described audion (T0) passes through resistance (R01)
Be connected to described voltage source (VCC), colelctor electrode is connected to the second of described tested optocoupler and sends
End (OP2), emitter stage are connected to described Zener diode (CT0)；Described field effect transistor (Q01)
Grid be connected to described main control module, source ground, drain electrode by the resistance being connected in series
And resistance (R03) is connected to the emitter stage of described audion (T0) (R02)；Described field
The grid of effect pipe (Q02) is connected to described main control module, source ground, drain electrode by electricity
Resistance (R04) is connected to the emitter stage of described audion (T0)；Described main control module is by being somebody's turn to do
Constant-current source circuit exports second transmitting terminal (OP2) of an electric current extremely described tested optocoupler as sending out
Sending end electric current, and it is worth to described electric current according to the ratio of described arrival current and transmitting terminal electric current
Transfer ratio.
6. according to the optocoupler electric property detection device described in claim 2-5 any one, its
Being characterised by, described voltage source (VCC) is lithium battery, Switching Power Supply or linear power supply.
Optocoupler electric property detection device the most according to claim 5, it is characterised in that
Described main control module is also associated with current switching module, and described current switching module is for according to institute
State the size of current of the instruction adjustment described constant-current source circuit output that main control module sends.
Optocoupler electric property detection device the most according to claim 7, it is characterised in that
Described current switching module includes digital regulation resistance and switch controller, and described main control module connects
In described digital regulation resistance, described digital regulation resistance is connected to described switch controller, described in cut
Changer controller is for regulating the resistance value of described digital regulation resistance, thus regulates described constant-current source electricity
The size of current of road output.
Optocoupler electric property detection device the most according to claim 8, it is characterised in that
Described switch controller include relay isolation switching device, light-coupled isolation switch and audion every
From switch, described relay isolation switching device, light-coupled isolation switch and audion isolation are cut
Parallel operation is connected to described digital regulation resistance.
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| CN201610658781.2A CN106019040B (en) | 2016-08-12 | 2016-08-12 | A kind of optocoupler electric property detection device |
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| CN109116137A (en) * | 2018-07-03 | 2019-01-01 | 华立科技股份有限公司 | Optocoupler test device |
| CN113253088A (en) * | 2021-06-25 | 2021-08-13 | 上海瞻芯电子科技有限公司 | Transistor gate oxide testing device and system |
| CN116027159A (en) * | 2023-01-30 | 2023-04-28 | 宁波群芯微电子股份有限公司 | Optocoupler voltage-resistant quality control method and optocoupler voltage-resistant test circuit |
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| CN106019040B (en) | 2019-05-07 |
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Denomination of invention: An optocoupler electrical performance testing device Granted publication date: 20190507 Pledgee: China Postal Savings Bank Co.,Ltd. Wuhan Branch Pledgor: WUHAN SAN FRAN ELECTRONICS Corp. Registration number: Y2024980022633 |