CN106019040B - A kind of optocoupler electric property detection device - Google Patents
A kind of optocoupler electric property detection device Download PDFInfo
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- CN106019040B CN106019040B CN201610658781.2A CN201610658781A CN106019040B CN 106019040 B CN106019040 B CN 106019040B CN 201610658781 A CN201610658781 A CN 201610658781A CN 106019040 B CN106019040 B CN 106019040B
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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
Abstract
The embodiment of the invention provides a kind of optocoupler electric property detection devices, belong to test technique automatic field.The optocoupler electric property detection device includes main control module, trigger module, display module and optocoupler test module, and the trigger module, display module and optocoupler test module are connected to the main control module.Wherein, the trigger module is used to generate trigger signal under the action of peripheral operation and is sent to the main control module；The main control module is used to control the optocoupler test module according to the trigger signal received and be tested；The optocoupler test module is used to detect the classical insulation of tested optocoupler, and the classical insulation that will test is sent to the display module and is shown.The present invention can be realized the automatic test to optocoupler, and effectively improve the accuracy and efficiency of test.
Description
Technical field
The present invention relates to test technique automatic fields, in particular to a kind of optocoupler electric property detection device.
Background technique
Optocoupler is the device for carrying out transmission telecommunications number using light as medium, is widely used in digital circuit, and optocoupler is broadly divided into
Photophore and light-receiving device.When input terminal power up signal, photophore emits beam, and light-receiving device then generates photoelectricity after receiving light
Stream, and flowed out from receiving end, to realize the conversion of " electrical-optical-electrical ".At present for the detection of optocoupler electric property to Guan Chong
It wants.
In the implementation process of the prior art, at least face following problems: the electricity function index of optocoupler can only hand one by one
All electricity function indexs cannot be detected disposably and be completed by dynamic detection；When detecting one by one, need artificial manual de-regulation defeated
Enter voltage to reach testing conditions, there is human errors；One optocoupler is needed in the detection for completing a set of electricity function index
The duration of consuming was at five minutes or more, low efficiency.
Summary of the invention
The present invention provides a kind of optocoupler electric property detection devices, it is intended to realize the automatic test to optocoupler, and
Effectively improve the accuracy and efficiency of test.
A kind of optocoupler electric property detection device provided in an embodiment of the present invention, including main control module, trigger module, display
Module and optocoupler test module, the trigger module, display module and optocoupler test module are connected to the main control module；
Wherein, the trigger module is used to generate trigger signal under the action of peripheral operation and is sent to the master control mould
Block；
The main control module is used to control the optocoupler test module according to the trigger signal received and be tested；
The optocoupler test module is used to detect the classical insulation of tested optocoupler, and the electric property ginseng that will test
Number is sent to the display module and is shown；Wherein, the optocoupler test module includes voltage forward direction output circuit, reversed leakage
Current output circuit receives current sampling circuit and constant-current source circuit, the voltage forward direction output circuit, reverse leakage current output
Circuit, reception current sampling circuit and constant-current source circuit are connected to the main control module and tested optocoupler；The electrical resistance
Energy parameter includes the forward voltage drop of the tested optocoupler, saturation voltage drop, reverse current, receives electric current and breakdown reverse voltage.
Preferably, the voltage forward direction output circuit includes field-effect tube (Q1) and field-effect tube (Q22), the field-effect
Pipe (Q1) is connected to the main control module by triode (T1), so that the main control module is by controlling the triode (T1)
On or off carrys out driving FET (Q1) on or off；The collector of the triode (T1) by resistance (R11) with
Voltage source (VCC) connection, base stage are connected to the main control module, emitter ground connection by resistance (R12)；The field-effect tube
(Q1) grid is connected to the collector of the triode (T1), source electrode is connected to the voltage source (VCC), drain electrode is connected to institute
State the first transmitting terminal (OP1) of tested optocoupler；The field-effect tube (Q22) is connected by triode (T21) and the main control module
Connect so that the main control module by control the triode (T21) on or off come driving FET (Q22) be connected or
Cut-off；The grid of the field-effect tube (Q22) is connected to the collector of the triode (T21), source electrode is connected to described be tested
The second transmitting terminal (OP2) of optocoupler, drain electrode are grounded by the resistance (R25) and resistance (R26) being connected in series；The triode
(T21) collector is connected to the voltage source (VCC), base stage by resistance (R23) and is connected to the master by resistance (R24)
Control module, emitter ground connection.
Preferably, the reverse leakage current output circuit includes field-effect tube (Q2) and field-effect tube (Q11)；The field effect
(Q2) should be managed to be connected to the main control module by triode (T2), so that the main control module is by controlling the triode (T2)
On or off carry out driving FET (Q2) on or off；The base stage of the triode (T2) is connected by resistance (R21)
It is connected to the main control module, collector and the voltage source (VCC), emitter ground connection is connected to by resistance (R22)；The field effect
The grid that (Q2) should be managed is connected to the collector of the triode (T2), source electrode is connected to the voltage source (VCC), drain electrode connection
In the second transmitting terminal (OP2) of the tested optocoupler；The grid of the field-effect tube (Q11) is connected to the main control module, leakage
The resistance (R13) and resistance (R14) that pole is connected to the first transmitting terminal (OP1) of the tested optocoupler, source electrode passes through series connection
Ground connection.
Preferably, the reception current sampling circuit includes resistance (R31), resistance (R32), resistance (R33) and resistance
(R34), the resistance (R31), resistance (R32), resistance (R33) and resistance (R34) are successively in parallel, the resistance (R31), resistance
(R32), one end of resistance (R33) and resistance (R34) is connected to the first receiving end (OP3), another of the tested optocoupler
End ground connection；The main control module passes through resistance (R31), resistance (R32), resistance (R33) and the resistance (R34) being connected in parallel
It connect with the first receiving end (OP3) of the tested optocoupler, is sampled with the arrival current to the tested optocoupler.
Preferably, the constant-current source circuit includes triode (T0), zener diode (CT0), field-effect tube (Q01) and field
Effect pipe (Q02)；The base stage of the triode (T0) is connected to the voltage source (VCC), collector connection by resistance (R01)
The zener diode (CT0) is connected in the second transmitting terminal (OP2), the emitter of the tested optocoupler；The field-effect tube
(Q01) grid is connected to the main control module, source electrode ground connection, drains through concatenated resistance (R02) and resistance (R03) connection
In the emitter of the triode (T0)；The grid of the field-effect tube (Q02) is connected to the main control module, source electrode is grounded,
Drain electrode is connected to the emitter of the triode (T0) by resistance (R04)；The main control module is defeated by the constant-current source circuit
The second transmitting terminal (OP2) of an electric current to the tested optocoupler is used as transmitting terminal electric current out, and according to the arrival current and
The ratio of transmitting terminal electric current obtains the current transfer ratio.
Preferably, the voltage source (VCC) is lithium battery, Switching Power Supply or linear power supply.
Preferably, the main control module is also connected with current switching module, and the current switching module is used for according to
The instruction that main control module is sent adjusts the size of current of the constant-current source circuit output.
Preferably, the current switching module includes digital regulation resistance and switch controller, and the main control module is connected to
The digital regulation resistance, the digital regulation resistance are connected to the switch controller, and the switch controller is described for adjusting
The resistance value of digital regulation resistance, to adjust the size of current of the constant-current source circuit output.
Preferably, the switch controller includes relay isolation switching device, light-coupled isolation switch and triode isolation
Switch, the relay isolation switching device, light-coupled isolation switch and triode isolation switching device are connected to the number electricity
Position device.
A kind of optocoupler electric property detection device provided in an embodiment of the present invention, by trigger module, display module and optocoupler
Test module is connected to main control module, so that main control module controls optocoupler test module according to the trigger signal that trigger module generates
Automatic test is carried out, the classical insulation that optocoupler test module will test is sent to display module and is shown, so
It can be realized the automatic test to optocoupler, and effectively improve the accuracy and efficiency of test.
Detailed description of the invention
In order to illustrate the technical solution of the embodiments of the present invention more clearly, below will be to needed in the embodiment attached
Figure is briefly described, it should be understood that the following drawings illustrates only certain embodiments of the present invention, therefore should not be viewed as pair
The restriction of range for those of ordinary skill in the art without creative efforts, can also be according to this
A little attached drawings obtain other relevant attached drawings.
Fig. 1 is a kind of structural block diagram for optocoupler electric property detection device that embodiment of the present invention provides.
Fig. 2 is a kind of circuit diagram for optocoupler electric property detection device that embodiment of the present invention provides.
Figure acceptance of the bid note is respectively as follows:
Optocoupler electric property detection device 100 is tested optocoupler 200；
Main control module 101, optocoupler test module 102, trigger module 103, display module 104, current switching module 105；
Voltage forward direction output circuit 201, reverse leakage current output circuit 202 receive current sampling circuit 203, constant-current source
Circuit 204.
Specific embodiment
In order to make the object, technical scheme and advantages of the embodiment of the invention clearer, below in conjunction with the embodiment of the present invention
In attached drawing, technical scheme in the embodiment of the invention is clearly and completely described, it is clear that described embodiment is
A part of the embodiment of the present invention, instead of all the embodiments.Based on the embodiments of the present invention, those of ordinary skill in the art
Every other embodiment obtained without creative efforts, shall fall within the protection scope of the present invention.
It should also be noted that similar label and letter indicate similar terms in following attached drawing, therefore, once a certain Xiang Yi
It is defined in a attached drawing, does not then need that it is further defined and explained in subsequent attached drawing.Meanwhile of the invention
In description, term " first ", " second " etc. are only used for distinguishing description, are not understood to indicate or imply relative importance.
The embodiment of the invention provides a kind of optocoupler electric property detection devices 100.As shown in Figure 1, the optocoupler is electrical
Device for detecting performance 100 may include main control module 101, optocoupler test module 102, trigger module 103 and display module 104.
The optocoupler test module 102, trigger module 103 and display module 104 are connected to the main control module 101.
Wherein, the trigger module 103 under the action of peripheral operation for generating trigger signal, and is sent to the master
Control module 101.The main control module 101 controls the optocoupler for receiving the trigger signal, and according to the trigger signal
Test module 102 is tested.Optionally, the trigger module 103 includes mechanical key, when the mechanical key is pressed
Trigger signal is sent to the main control module 101, the main control module 101 is triggered and starts 102 pairs of quilts of the optocoupler test module
It surveys optocoupler 200 and carries out automatic test.
The optocoupler test module 102 is used to detect the electricity of the tested optocoupler 200 under the action of the trigger signal
Gas performance parameter, and the classical insulation that will test is sent to the main control module 101, the main control module 101 controls
The display module 104 shows the classical insulation.
In the present embodiment, the optocoupler test module 102 includes voltage forward direction output circuit 201, reverse leakage current output
Circuit 202 receives current sampling circuit 203 and constant-current source circuit 204.The voltage forward direction output circuit 201, reverse leakage current
Output circuit 202, reception current sampling circuit 203 and constant-current source circuit 204 are connected to the main control module 101 and are tested
Optocoupler 200.The voltage forward direction output circuit 201, receives current sampling circuit 203 and perseverance at reverse leakage current output circuit 202
Current source circuit 204 is able to detect that the various different classical insulations of the tested optocoupler 200.The classical insulation master
It to include forward voltage drop, saturation voltage drop, reverse current, current transfer ratio and the breakdown reverse voltage of the tested optocoupler 200.
As shown in Fig. 2, the voltage forward direction output circuit 201 is used to detect the forward voltage drop of the tested optocoupler 200,
It may include field-effect tube Q1 and field-effect tube Q22.The field-effect tube Q1 is connected by triode T1 and the main control module 101
Connect so that the main control module 101 can by control the on or off of triode T1 come driving FET Q1 conducting or
Cut-off.Specifically, the grid of the field-effect tube Q1 connect with the collector of triode T1, source electrode connection voltage source VCC, drains
It is connected to the first transmitting terminal OP1 of the tested optocoupler 200.In the present embodiment, the triode T1 can be three pole of NPN type
Pipe, the voltage source VCC are lithium battery or Switching Power Supply.The collector of the triode T1 passes through resistance R11 connection voltage source
VCC, base stage are connected to the main control module 101 by resistance R12, emitter is grounded.The main control module 101 passes through resistance
R12 is sent to the triode T1 controls signal, the triode T1 on or off under the action of control signal, so
Corresponding control signal is sent to the field-effect tube Q1, to drive field-effect tube Q1 to be connected or cut by triode T1 afterwards
Only.In other embodiments, the triode T1 also be can be omitted, and directly drive the field-effect tube using the main control module 101
Q1.In the present embodiment, triode T1 is used between main control module 101 and field-effect tube Q1, passes through triode T1 and field-effect
The combination of pipe Q1 can avoid field-effect tube Q1 and occur the output electricity of main control module 101 under the directly driving of main control module 101
When being pressed in 3V or so the case where field-effect tube Q1 state labile.Voltage source VCC is battery, Switching Power Supply or linear power supply.
The field-effect tube Q22 is connect by triode T21 with the main control module 101, so that the main control module 101
It can be by controlling the on or off of triode T21 come driving FET Q22 on or off.Specifically, the field effect
Should pipe Q22 grid be connected to the triode T21 collector, source electrode be connected to the tested optocoupler 200 second send
OP2, drain electrode is held to be grounded by the resistance R25 and resistance R26 being connected in series.The collector of the triode T21 passes through resistance R23
It is connected to the voltage source VCC, base stage and the main control module 101, emitter ground connection is connected to by resistance R24.The master control
Module 101 sends control signal to the triode T21 by resistance R24, to control the triode T21 on or off,
Then control signal is sent to the field-effect tube Q22, to control field-effect tube Q22 on or off by triode T21.
In other embodiments, the triode T21 also be can be omitted, and directly drive the field-effect tube using the main control module 101
Q22.In the present embodiment, triode T21 is used between main control module 101 and field-effect tube Q22, passes through triode T21 and field
The combination of effect pipe Q22 can avoid field-effect tube Q22 and occur main control module 101 under the directly driving of main control module 101
Output voltage is in 3V or so the case where field-effect tube Q22 state labile.The main control module 101 can obtain the resistance
Voltage signal between R25 and resistance R26.It illustrates in detail below and the quilt is tested by the forward voltage output circuit 201
Survey the test philosophy of the forward voltage drop of optocoupler 200.
Firstly, the forward voltage drop is between the first transmitting terminal OP1 and the second transmitting terminal OP2 of the tested optocoupler 200
Pressure drop.When testing the forward voltage drop, the main control module 101 sends control signal to the triode T1 and triode respectively
T21 respectively drives the field-effect tube Q1 and field-effect tube Q22 conducting, so that the voltage signal of the voltage source VCC passes through institute
The first transmitting terminal OP1 that field-effect tube Q1 is sent to the tested optocoupler 200 is stated, and passes through the second of the tested optocoupler 200
Transmitting terminal OP2 output, is then transmitted to resistance R25 and R26 by field-effect tube Q22 and is divided, finally by the master control mould
Block 101 measures the mode of voltage division signal to measure the forward voltage drop.Wherein, the resistance R25 and R26 is sampling resistor.This
In embodiment, when testing the forward voltage drop, the main control module 101 is sent to the control of triode T1 and triode T21
Signal can be high level and be also possible to low level, determine with specific reference to the type of triode T1 and triode T21.This implementation
In example, the first transmitting terminal OP1 refers to the anode connection port of the light emitting diode of tested optocoupler 200, and described second sends
End OP2 refers to the cathode connection port of the light emitting diode.
Fig. 2 is further regarded to, the reverse leakage current output circuit 202 includes field-effect tube Q2 and field-effect tube Q11.Its
In, the field-effect tube Q2 is connect by triode T2 with the main control module 101, so that the main control module 101 can pass through
The on or off for controlling triode T2 carrys out driving FET Q2 on or off.The grid of the field-effect tube Q2 connects
In collector, the source electrode of the triode T2 are connected to the voltage source VCC, drain electrode is connected to the of the tested optocoupler 200
Two transmitting terminal OP2.The base stage of the triode T2 is connected to the main control module 101 by resistance R21, collector passes through resistance
R22 is connected to the voltage source VCC, emitter ground connection.The main control module 101 is sent out by resistance R21 to the triode T2
Control signal is sent, to control triode T2 on or off, control signal is then sent by triode T2, described in control
Field-effect tube Q2 on or off.In other embodiments, the triode T2 also be can be omitted, and use the main control module 101
Directly drive field-effect tube Q2.In the present embodiment, triode T2 is used between main control module 101 and field-effect tube Q2, is led to
The combination for crossing triode T2 and field-effect tube Q2 can avoid field-effect tube Q2 appearance under the directly driving of main control module 101
The output voltage of main control module 101 is in 3V or so the case where field-effect tube Q2 state labile.The grid of the field-effect tube Q11
Pole is connected to the main control module 101, drain electrode is connected to the first transmitting terminal OP1, the source electrode of the tested optocoupler 200 and passes through series connection
Resistance R13 and resistance R14 ground connection.The main control module 101 can send control signal to the field-effect tube Q11, with control
Make the field-effect tube Q11 on or off.The main control module 101 is also attached between the resistance R13 and resistance R14,
The main control module 101 is enabled to obtain the voltage division signal between the resistance R13 and resistance R14.Institute is illustrated in detail below
State the test philosophy of the reverse current of tested optocoupler 200.
The reverse current is that the second transmitting terminal OP2 of the tested optocoupler 200 flows to the electric current of the first transmitting terminal OP1.
When testing the reverse current, the main control module 101 sends control signal to the triode T2, is driven by triode T2
The field-effect tube Q2 conducting and driving FET Q11 conducting simultaneously, so that the voltage signal of the voltage source VCC passes through institute
State the second transmitting terminal OP2 that field-effect tube Q2 is sent to the tested optocoupler 200.Meanwhile main control module 101 controls the constant current
Source circuit 204 is also supplied with corresponding electric current to second transmitting terminal OP2, and by passing sequentially through after the first transmitting terminal OP1
The field-effect tube Q11, resistance R13 and resistance R14.Finally, as described in being connected between the resistance R13 and resistance R14
Main control module 101 measures the reverse current.Wherein, the resistance R13 and R14 is sampling resistor.In the present embodiment, testing
When the reverse current, the control signal that the main control module 101 is sent to triode T2 can be high level be also possible to it is low
Level is determined with specific reference to the type of triode T2.
In the present embodiment, when testing the forward voltage drop, except it is connected in the field-effect tube Q1 and field-effect tube Q22
Outside, other field-effect tube are in off state.When testing the reverse current, the field-effect tube Q2 and field-effect tube are removed
Except Q11 conducting, other field-effect tube are in off state.
The current transfer ratio refers to the ratio between arrival current and transmitting terminal electric current of the tested optocoupler 200.Test should
When current transfer ratio, firstly, the main control module 101, which controls the constant-current source circuit 204, exports an electric current (transmitting terminal electric current),
The electric current flows to the second transmitting terminal OP2 from the first transmitting terminal OP1 of the tested optocoupler 200.Then, the main control module
101 send control signal to the triode T2, and drive the field-effect tube Q2 conducting by triode T2, and drive simultaneously
Dynamic field-effect tube Q11 conducting.Second receiving end OP4 of the tested optocoupler 200 is connected to voltage source VCC, the tested optocoupler
The electric signal that 200 receiving end photosensitive semiconductor pipe exports voltage source VCC passes through after passing through the first receiving end OP3 by described
It receives current sampling circuit 203 and is transferred to main control module 101, obtain arrival current.According to arrival current and transmitting terminal electricity
The current transfer ratio can be obtained in the ratio of stream.
Further, the reception current sampling circuit 203 may include resistance R31, resistance R32, resistance R33 and resistance
R34.The resistance R31, resistance R32, resistance R33 and resistance R34 are successively connected in parallel.The resistance R31, resistance R32, resistance
One end after R33 and resistance R34 are in parallel is connected to the first receiving end OP1 and the master control mould of the tested optocoupler 200
Block 101, other end ground connection.Wherein, the resistance R31, resistance R32, resistance R33 and resistance R34 can also be used single high-power
Resistance substitution.First receiving end OP3 of the tested optocoupler 200 be connected to the resistance R31 being connected in parallel, resistance R32,
Resistance R33 and resistance R34, the second receiving end OP4 are connected to the voltage source VCC.In the present embodiment, first receiving end
OP3 refers to the emitter Wiring port of the receiving end photosensitive semiconductor pipe of the tested optocoupler 200, the second receiving end OP4
Refer to the collector Wiring port of the receiving end photosensitive semiconductor pipe of the tested optocoupler 200.
Referring again to Fig. 2, the constant-current source circuit 204 include triode T0, zener diode CT0, field-effect tube Q01 and
Field-effect tube Q02.Wherein, the base stage of the triode T0 is connected to the voltage source VCC, collector connection by resistance R01
The zener diode CT0 is connected in the second transmitting terminal OP2, the emitter of the tested optocoupler 200.The triode T0 exists
On or off under the action of the second transmitting terminal OP2 output voltage.The grid of the field-effect tube Q01 is connected to the master
Control module 101, source electrode ground connection, draining is connected to the transmitting of the triode T0 by the resistance R02 and resistance R03 of series connection
Pole.The grid of the field-effect tube Q02 is connected to the main control module 101, source electrode is grounded, drain electrode is connected to by resistance R04
The emitter of the triode T0.In the present embodiment, the resistance value of the resistance R02, resistance R03 and resistance R04 are according to
The size of current of constant-current source output determines.Optionally, the resistance R02, resistance R03 and resistance R04 available digital potentiometer
To replace.The main control module 101 sends control signal, selection to the field-effect tube Q01 and field-effect tube Q02 respectively
Property one of described field-effect tube Q01, Q02 of conducting, and then it is exportable two different to control the constant-current source circuit 204
Export electric current.For example, the different output electric current can be 10mA or 5mA or other.
In the present embodiment, the main control module 101 may be a kind of IC chip, the processing capacity with signal,
Such as miniature control unit (Micro Control Unit, MCU), single-chip microcontroller etc..It is the voltage forward direction output circuit 201, anti-
It is connected to leakage current output circuit 202, reception current sampling circuit 203, constant-current source circuit 204 with the main control module 101
Each element is connected respectively in the different control ports (port) of the main control module 101.
Fig. 1 is further regarded to, the main control module 101 can also connect current switching module 105.The current switching mould
The output electric current for the instruction adjustment constant-current source circuit 204 that block 105 is used to be sent according to the main control module 101, such as
Switch between the 10mA and 5mA.
Optionally, the current switching module 105 includes digital regulation resistance and switch controller.The switch controller is logical
Cross the resistance value that digital control scheme adjusts the digital regulation resistance.The digital regulation resistance has using flexible, degree of regulation height, nothing
Contact, low noise, be not easy to be stained, anti-vibration, long anti-interference, small in size and service life the features such as.Wherein, the switch controller can
To include relay isolation switching device, light-coupled isolation switch and triode isolation switching device.The relay isolation switching device,
Light-coupled isolation switch and triode isolation switching device are connected to the digital regulation resistance.The switch controller by it is described after
Electric appliance isolation switching device, light-coupled isolation switch and triode isolation switching device realize that switching is isolated with the digital regulation resistance.
Further, the display module 104 can be liquid crystal display, touch control display, charactron or other any
It is displayed for the display equipment of the classical insulation of the tested optocoupler 200.
A kind of optocoupler electric property detection device 100 provided in an embodiment of the present invention, by 103 pieces of trigger mode, display module
104 and optocoupler test module 102 be connected to main control module 101 so that the touching that main control module 101 is generated according to trigger module 103
Control optocoupler test module 102 of signaling carries out automatic test, the classical insulation that optocoupler test module 102 will test
It is sent to display module 104 to be shown, so can be realized the automatic test to optocoupler, and effectively improve the standard of test
True property and efficiency.
Part auxiliary element and line are also connected on the basis of foregoing circuit, in the present embodiment, for guaranteeing electricity
The normal operation on road, the use of these auxiliary elements and line belong to the circuit application habit of industry universal, no longer superfluous herein
It states.
The unit as illustrated by the separation member may or may not be physically separated, aobvious as unit
The component shown may or may not be physical unit, it can and it is in one place, or may be distributed over multiple
In network unit.It can select some or all of unit therein according to the actual needs to realize the mesh of this embodiment scheme
's.
It, can also be in addition, the functional units in various embodiments of the present invention may be integrated into one processing unit
It is that each unit physically exists alone, can also be integrated in one unit with two or more units.
It should be noted that, in this document, term " includes " or its any other variant are intended to nonexcludability
Include, so that article or equipment including a series of elements not only include those elements, but also including not clear
The other element listed.In the absence of more restrictions, the element limited by sentence "including a ...", it is not excluded that
There is also other identical elements in the article or equipment for including the element.
The above description is merely a specific embodiment, but scope of protection of the present invention is not limited thereto, any
Those familiar with the art in the technical scope disclosed by the present invention, can easily think of the change or the replacement, and should all contain
Lid is within protection scope of the present invention.Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.
Claims (7)
1. a kind of optocoupler electric property detection device, which is characterized in that the optocoupler electric property detection device includes master control mould
Block, trigger module, display module and optocoupler test module, the trigger module, display module and optocoupler test module are connected to
The main control module；
Wherein, the trigger module is used to generate trigger signal under the action of peripheral operation and is sent to the main control module；
The main control module is used to control the optocoupler test module according to the trigger signal received and be tested；
The optocoupler test module is used to detect the classical insulation of tested optocoupler, and the classical insulation hair that will test
The display module is given to be shown；Wherein, the optocoupler test module includes voltage forward direction output circuit, reverse leakage current
Output circuit receives current sampling circuit and constant-current source circuit, the voltage forward direction output circuit, reverse leakage current output electricity
Road, reception current sampling circuit and constant-current source circuit are connected to the main control module and tested optocoupler；The electric property
Parameter includes forward voltage drop, saturation voltage drop, reverse current, current transfer ratio and the breakdown reverse voltage of the tested optocoupler；
Wherein, the voltage forward direction output circuit includes that field-effect tube Q1 and field-effect tube Q22, the field-effect tube Q1 pass through three
Pole pipe T1 is connected to the main control module, so that the main control module is driven by controlling the on or off of triode T1
Field-effect tube Q1 on or off；The collector of the triode T1 is connect by resistance R11 with voltage source VCC, base stage passes through
Resistance R12 is connected to the main control module, emitter ground connection；The grid of the field-effect tube Q1 is connected to the triode T1's
Collector, source electrode are connected to the voltage source VCC, drain electrode is connected to the first transmitting terminal OP1 of the tested optocoupler；The field effect
Should pipe Q22 be connected to the main control module by triode T21 so that the main control module passes through control triode T21
On or off carrys out driving FET Q22 on or off；The grid of the field-effect tube Q22 is connected to the triode
Collector, the source electrode of T21 be connected to the tested optocoupler the second transmitting terminal OP2, drain electrode by be connected in series resistance R25 and
Resistance R26 ground connection；The collector of the triode T21 is connected to the voltage source VCC by resistance R23, base stage passes through resistance
R24 is connected to the main control module, emitter ground connection；
The reverse leakage current output circuit includes field-effect tube Q2 and field-effect tube Q11；The field-effect tube Q2 passes through three poles
Pipe T2 is connected to the main control module, so that the main control module is by controlling the on or off of triode T2 come driving field
Effect pipe Q2 on or off；The base stage of the triode T2 is connected to the main control module by resistance R21, collector passes through
Resistance R22 is connected to the voltage source VCC, emitter ground connection；The grid of the field-effect tube Q2 is connected to the triode T2
Collector, source electrode is connected to the voltage source VCC, drain electrode is connected to the second transmitting terminal OP2 of the tested optocoupler；The field
The grid of effect pipe Q11 is connected to the main control module, drain electrode is connected to the first transmitting terminal OP1, the source electrode of the tested optocoupler
It is grounded by the resistance R13 and resistance R14 of series connection.
2. optocoupler electric property detection device according to claim 1, which is characterized in that the reception current sampling circuit
Including resistance R31, resistance R32, resistance R33 and resistance R34, the resistance R31, resistance R32, resistance R33 and resistance R34 are successively
Parallel connection, the resistance R31, resistance R32, resistance R33 and resistance R34 one end be connected to the first of the tested optocoupler and connect
Receiving end OP3, other end ground connection；The main control module passes through resistance R31, resistance R32, resistance R33 and the electricity being connected in parallel
Resistance R34 is connect with the first receiving end OP3 of the tested optocoupler, is sampled with the arrival current to the tested optocoupler.
3. optocoupler electric property detection device according to claim 2, which is characterized in that the constant-current source circuit includes three
Pole pipe T0, zener diode CT0, field-effect tube Q01 and field-effect tube Q02；The base stage of the triode T0 is connected by resistance R01
Be connected to the voltage source VCC, collector be connected to the tested optocoupler the second transmitting terminal OP2, emitter be connected to it is described steady
Press diode CT0；The grid of the field-effect tube Q01 is connected to the main control module, source electrode is grounded, drain electrode passes through series connection
Resistance R02 and resistance R03 be connected to the emitter of the triode T0；The grid of the field-effect tube Q02 is connected to described
Main control module, source electrode ground connection, draining is connected to the emitter of the triode T0 by resistance R04；The main control module passes through
The constant-current source circuit exports the second transmitting terminal OP2 of an electric current to the tested optocoupler as transmitting terminal electric current, and according to described
The ratio of arrival current and transmitting terminal electric current obtains the current transfer ratio.
4. optocoupler electric property detection device according to claim 1 to 3, which is characterized in that the voltage source
VCC is lithium battery, Switching Power Supply or linear power supply.
5. optocoupler electric property detection device according to claim 3, which is characterized in that the main control module is also connected with
Current switching module, the instruction that the current switching module is used to be sent according to the main control module adjust the constant-current source circuit
The size of current of output.
6. optocoupler electric property detection device according to claim 5, which is characterized in that the current switching module includes
Digital regulation resistance and switch controller, the main control module are connected to the digital regulation resistance, and the digital regulation resistance is connected to
The switch controller, the switch controller is used to adjust the resistance value of the digital regulation resistance, to adjust the constant current
The size of current of source circuit output.
7. optocoupler electric property detection device according to claim 6, which is characterized in that the switch controller include after
Electric appliance isolation switching device, light-coupled isolation switch and triode isolation switching device, the relay isolation switching device, light-coupled isolation
Switch and triode isolation switching device are connected to the digital regulation resistance.
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| CN107860572A (en) * | 2017-11-28 | 2018-03-30 | 安徽宏实光机电高科有限公司 | The consistency detection device and detection method of a kind of high frequency valve |
| CN109116137A (en) * | 2018-07-03 | 2019-01-01 | 华立科技股份有限公司 | Optocoupler test device |
| CN113253088B (en) * | 2021-06-25 | 2021-09-28 | 上海瞻芯电子科技有限公司 | Transistor gate oxide testing device and system |
| CN116027159B (en) * | 2023-01-30 | 2023-08-25 | 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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| CN201662599U (en) * | 2010-01-21 | 2010-12-01 | 深圳市炜烨丰电子科技有限公司 | Photoelectric coupler detection device |
| CN102175941B (en) * | 2011-01-31 | 2013-04-24 | 广州金升阳科技有限公司 | Optical coupler measurement device capable of directly displaying current transfer ratio |
| CN202330531U (en) * | 2011-11-04 | 2012-07-11 | 深圳市江机实业有限公司 | Current transfer ration testing device for photoelectric coupler |
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