CN219552473U

CN219552473U - Test fixture for detecting performance of optocoupler

Info

Publication number: CN219552473U
Application number: CN202320218379.8U
Authority: CN
Inventors: 陈晨
Original assignee: Taicang T&W Electronics Co Ltd
Current assignee: Taicang T&W Electronics Co Ltd
Priority date: 2023-02-15
Filing date: 2023-02-15
Publication date: 2023-08-18
Anticipated expiration: 2033-02-15

Abstract

The utility model relates to the technical field of electronic component detection, in particular to a test fixture for detecting the performance of an optocoupler, which comprises an oscilloscope, a data connecting wire, an external protective shell assembly, the optocoupler and a detection circuit, wherein the detection circuit is arranged in a cavity of the external protective shell assembly and is used for detecting the optocoupler, the optocoupler is inserted at the top of the external protective shell assembly and is electrically connected with the detection circuit, one end of the data connecting wire is inserted at the top of the external protective shell assembly and is electrically connected with the detection circuit, and the other end of the data connecting wire is connected to a wiring port of the oscilloscope.

Description

Test fixture for detecting performance of optocoupler

Technical Field

The utility model relates to the technical field of electronic component detection, in particular to a test fixture for detecting optical coupling performance.

Background

Optocouplers (opticalcoupler equipment, abbreviated OCEP) are also known as opto-isolators or optocouplers, abbreviated optocouplers. It is a device for transmitting electric signals by using light as medium, and usually a light emitter (infrared light emitting diode LED) and a light receiver (photo-sensitive semiconductor tube, photo-resistor) are packaged in the same package. When the input end is powered on, the light emitter emits light, and the light receiver receives the light to generate photocurrent, and the photocurrent flows out of the output end, so that the 'electro-optical-electrical' control is realized. The photoelectric coupler using light as medium to couple the signal of input end to output end has the advantages of small volume, long service life, no contact, strong anti-interference capability, insulation between output and input, unidirectional signal transmission, etc. and can be widely used in digital circuits. In order to ensure that the optocoupler device can work normally, the telecommunication of the optocoupler device needs to be verified, the optocoupler device can work normally through verification, if the optocoupler device with problems is used in a circuit, the circuit can be broken down, so that the time-consuming and labor-consuming circuit maintenance is needed, and the workload and the use feeling of a user are increased.

Disclosure of Invention

The utility model provides a test fixture for detecting the performance of an optocoupler, which aims to verify whether an electric signal sent by the optocoupler is normal or not by controlling the on-off of an MOS tube and is used for evaluating whether the optocoupler can work normally or not.

To achieve the purpose, the utility model adopts the following technical scheme:

the utility model provides a test fixture for detecting opto-coupler performance, includes oscilloscope, data connecting wire, outside protective housing subassembly, opto-coupler device and detection circuitry, detection circuitry installs in the intracavity of outside protective housing subassembly and is used for detecting the opto-coupler device, the opto-coupler device is installed at the top of outside protective housing subassembly and is connected with detection circuitry electricity, the one end of data connecting wire is installed at the top of outside protective housing subassembly and is connected with detection circuitry electricity, and the other end is connected on the wiring mouth of oscilloscope, the outside of oscilloscope placed at outside protective housing subassembly is used for verifying whether the signal of telecommunication that the opto-coupler device sent is normal.

Further, the outside protective housing subassembly includes casing and upper cover plate, the intracavity of casing is equipped with the retainer plate and is used for fixed detection circuitry position, one side matrix of upper cover plate top is equipped with a plurality of spliced eyes and is used for the optocoupler pin to peg graft on detection circuitry, the opposite side of upper cover plate top is equipped with the connector and is used for making the data connecting wire connect in the detection circuitry, the top of upper cover plate installation at the casing is used for covering the casing intracavity.

Further, the detection circuit comprises a circuit board, a connecting wire seat and an optocoupler test seat, wherein the optocoupler test seat is arranged on the circuit board and corresponds to the fixedly connected optocoupler device with the plug hole, and the connecting wire seat is arranged on the circuit board and corresponds to the fixedly connected data connecting wire with the connecting port.

Further, the circuit board includes resistance R1, resistance R2, resistance R3, resistance R4, resistance R5, MOS pipe Q1 and test point, 1V8 power supply voltage is connected to resistance R1 'S one end, and on the 4 pins of opto-coupler device are connected to the other end, MOS pipe Q1 drain electrode D pin is connected to resistance R3' S one end, and the other end is connected on opto-coupler device 'S3 pins, 1V8 power supply voltage is connected to resistance R2' S one end, resistance R3 'S one end, on opto-coupler device' S1 pin is connected to resistance R5 'S one end, and the other end is connected on 3V3 power supply voltage, resistance R4' S one end connection resistance R5 'S one end, the test point is connected to the other end, opto-coupler device' S2 pin signal ground, MOS pipe Q1 grid G inserts control lA, MOS pipe Q1 source S ground.

The utility model has the beneficial effects that:

1. according to the test fixture for detecting the performance of the optocoupler, disclosed by the utility model, the problems that the circuit faults are caused by the fact that the optocoupler devices with partial performance problems in the prior art are used in the circuit can be solved by designing the matching of the detection circuit and the oscilloscope, so that the circuit is required to be overhauled in a time-consuming and labor-consuming manner are solved.

2. The detection circuit is designed, the continuous square wave signals generated by controlling the on-off of the MOS tube are controlled by utilizing the control A signals, then the oscilloscope is used for detecting the continuous square wave signals to judge the quality of the optocoupler device, the price of the components forming the detection circuit is common, the production cost can be reduced, and the possibility of circuit faults can be reduced by the good optocoupler device, so that the use feeling of a user is improved, and the workload is reduced.

3. In the optical coupler device detection process, only pins of the optical coupler device are required to pass through the plug holes of the upper cover plate to fix the optical coupler device on the optical coupler test seat, the optical coupler device is taken down after the test is finished, the operation is simple and convenient, the cost is low, the optical coupler device can be used repeatedly, the cost performance is high, and meanwhile, the test environment is easy to build.

Drawings

In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings which are used in the description of the embodiments or the prior art will be briefly described, it being obvious that the drawings in the description below are only some embodiments of the utility model, and that other drawings can be obtained from them without inventive faculty for a person skilled in the art.

FIG. 1 is an exploded view of the overall three-dimensional structure of the present utility model;

FIG. 2 is an exploded view of the overall perspective of the outer protective case assembly of the present utility model;

FIG. 3 is an exploded view of the overall three-dimensional structure of the detection circuit of the present utility model;

FIG. 4 is a schematic circuit diagram of a circuit board according to the present utility model;

in the figure:

1. an oscilloscope; 11. a wiring port;

2. a data link line;

3. an outer protective shell assembly; 31. a housing; 311. a fixing ring; 32. an upper cover plate; 321. a plug hole; 322. a connection port;

4. an optocoupler device;

5. a detection circuit; 51. a circuit board; 52. a connecting wire seat; 53. an optocoupler test socket.

Detailed Description

The utility model is further described with reference to the following detailed drawings in order to make the technical means, the creation characteristics, the achievement of the purpose and the effect of the implementation of the utility model easy to understand.

Referring to fig. 1, a test fixture for detecting performance of an optocoupler includes an oscilloscope 1, a data connection line 2, an external protection shell assembly 3, an optocoupler device 4 and a detection circuit 5, wherein the detection circuit 5 is installed in a cavity of the external protection shell assembly 3 and is used for detecting the optocoupler device 4, the optocoupler device 4 is inserted at the top of the external protection shell assembly 3 and is electrically connected with the detection circuit 5, one end of the data connection line 2 is inserted at the top of the external protection shell assembly 3 and is electrically connected with the detection circuit 5, the other end of the data connection line 2 is connected to a wiring port 11 of the oscilloscope 1, the oscilloscope 1 is placed outside the external protection shell assembly 3 and is used for verifying whether an electric signal emitted by the optocoupler device 4 is normal, a tester firstly uses the data connection line 2 to connect the detection circuit 5 in the external protection shell with the oscilloscope 1, then inserts the optocoupler device 4 to be detected at the top of the external protection shell assembly 3 and enables the optocoupler device 4 to be electrically connected with the detection circuit 5, continuous signals are generated by using the detection circuit 5, the detection circuit 5 transmits generated square wave signals to the output from the external protection shell assembly 4, and can be verified whether the optocoupler device 4 can be normally detected by the detection device 4 is replaced, and the detection circuit 4 can be normally, and the detection device can be normally used, and the optocoupler device 4 can be normally detected, and the safety of the optocoupler device can be normally detected, and the device can be normally replaced, and the detection device can be normally, and the optocoupler device can be normally used for the protection.

Referring to fig. 2, the external protection shell assembly 3 includes a housing 31 and an upper cover plate 32, a fixing ring 311 is disposed in a cavity of the housing 31 for fixing a position of the detection circuit 5, a plurality of plugging holes 321 are disposed on a matrix on one side of the upper cover plate 32 for plugging pins of the optical coupler device 4 on the detection circuit 5, a connection port 322 is disposed on another side of the upper cover plate 32 for connecting the data connection line 2 to the detection circuit 5, the upper cover plate 32 is mounted on top of the housing 31 for covering the cavity of the housing 31, the fixing ring 311 disposed in the cavity of the housing 31 firmly fixes the detection circuit 5 in the cavity, and the detection circuit 5 is prevented from shaking and striking in the cavity of the housing 31 during use to cause loosening of welded components on the detection circuit 5 to affect subsequent detection results, and the plugging holes 321 and the connection port 322 are disposed on the upper cover plate 32 to facilitate electrical connection of the data connection line 2 and the optical coupler device 4 with the detection circuit 5.

Referring to fig. 3, the detection circuit 5 includes a circuit board 51, a connection wire holder 52 and an optocoupler test holder 53, the optocoupler test holder 53 is mounted on the circuit board 51 and corresponds to the socket 321 to fixedly connect the optocoupler device 4, the connection wire holder 52 is mounted on the circuit board 51 and corresponds to the connection port 322 to fixedly connect the data connection wire 2, the connection wire holder 52 and the optocoupler test holder 53 are mounted on the circuit board 51 to provide conditions for connecting the circuit board 51 with other devices, the connection wire holder 52 is mounted to enable one end of the data connection wire 2 to be plugged on the connection wire holder 52 to form electrical connection with the circuit board 51, the optocoupler test holder 53 is electrically connected with the circuit board 51, when the optocoupler device 4 to be detected is plugged on the optocoupler test holder 53, the optocoupler test holder 53 electrically connects the optocoupler device 4 to be detected with the circuit board 51, the optocoupler device 4 to be detected is removed from the optocoupler test holder 53 after the detection is completed, and the next optocoupler device 4 to be detected is replaced.

Referring to fig. 4, the circuit board 51 includes a resistor R1, a resistor R2, a resistor R3, a resistor R4, a resistor R5, a MOS transistor Q1 and a test point, one end of the resistor R1 is connected to a 1V8 power supply voltage, the other end is connected to a 4 pin of the optocoupler 4, one end of the resistor R3 is connected to a drain D pin of the MOS transistor Q1, the other end is connected to a 3 pin of the optocoupler 4, one end of the resistor R2 is connected to a 1V8 power supply voltage, the other end is connected to one end of the resistor R3, one end of the resistor R5 is connected to a 1 pin of the optocoupler 4, the other end is connected to a test point, a 2 pin signal of the optocoupler 4 is grounded, a gate G of the MOS transistor Q1 is connected to a control la, a source S of the MOS transistor Q1 is grounded, when the optocoupler 4 is inserted into the optocoupler test socket 53, the optocoupler 4 and the circuit board 51 are electrically connected together to form a complete optocoupler 4, one end is connected to a 1 pin of the optocoupler 4, the other end is connected to a 3V3, the voltage is connected to a 3, the voltage is measured, the voltage is limited by the voltage is measured, the voltage is measured on the 3V3, the resistor R4 is connected to the resistor R4, and the resistor is connected to the 3, and the resistor is used to the 3, the resistor is the 2, and the 2. The 4 pin is the positive pole of opto-coupler, pulls up to 1V8 power supply voltage through resistance R1, and supply voltage is 1.8V, and resistance R1 resistance is 1K ohm, and the 3 pin is the negative pole of opto-coupler, is connected to MOS pipe Q1 through resistance R3, and resistance R3 resistance is 22 ohms, is used for restricting MOS pipe Q1 and switches on and produce concussion and overshoot in the twinkling of an eye, and resistance R2 is the pull-up resistance of negative pole, and resistance is 1K ohm, and supply voltage is 1.8V. The MOS tube Q1 is an NMOS device, the grid electrode of the MOS tube Q1 is controlled by a control A, when the control A is in a high level, the MOS tube Q1 is conducted, the 3 pin of the optocoupler 4 is pulled down to the ground, when the control A is in a low level, the MOS tube Q1 is disconnected, the 3 pin of the optocoupler 4 is pulled up to 1.8V, and through repeated switching of the MOS tube Q1, the continuous square wave signal is generated by the 1 pin of the optocoupler 4, and is transmitted into the oscilloscope 1 through the matching of the test point and the data connecting wire 2, so that whether the electric signal sent by the optocoupler 4 is normal or not is verified, and whether the optocoupler 4 can work normally is evaluated.

The foregoing has shown and described the basic principles and main features of the present utility model and the advantages of the present utility model. It will be understood by those skilled in the art that the present utility model is not limited to the embodiments described above, and that the above embodiments and descriptions are merely illustrative of the principles of the present utility model, and various changes and modifications may be made without departing from the spirit and scope of the utility model, which is defined in the appended claims. The scope of the utility model is defined by the appended claims and equivalents thereof.

Claims

1. The utility model provides a test fixture for detecting optocoupler performance, its characterized in that includes oscilloscope (1), data connecting wire (2), outer protective housing subassembly (3), optocoupler device (4) and detection circuitry (5), detection circuitry (5) are installed in the intracavity of outer protective housing subassembly (3) and are used for detecting optocoupler device (4), optocoupler device (4) are installed at the top of outer protective housing subassembly (3) and are connected with detection circuitry (5) electricity, the top at outer protective housing subassembly (3) is installed to one end of data connecting wire (2) and are connected with detection circuitry (5) electricity, and the other end is connected on junction (11) of oscilloscope (1), oscilloscope (1) are placed in the outside of outer protective housing subassembly (3) and are used for verifying whether the electric signal that optocoupler device (4) sent is normal.

2. The test fixture for detecting optical coupler performance according to claim 1, wherein the outer protective housing assembly (3) comprises a housing (31) and an upper cover plate (32), a fixing ring (311) is arranged in a cavity of the housing (31) for fixing the position of the detection circuit (5), a plurality of plug holes (321) are arranged in a matrix mode on one side above the upper cover plate (32) for plugging pins of the optical coupler device (4) on the detection circuit (5), a connecting port (322) is arranged on the other side above the upper cover plate (32) for connecting the data connecting wire (2) to the detection circuit (5), and the upper cover plate (32) is arranged on the top of the housing (31) for covering the cavity of the housing (31).

3. The test fixture for detecting optical coupler performance according to claim 1, wherein the detection circuit (5) comprises a circuit board (51), a connection wire seat (52) and an optical coupler test seat (53), the optical coupler test seat (53) is mounted on the circuit board (51) and corresponds to the fixed connection optical coupler device (4) with the plugging hole (321), and the connection wire seat (52) is mounted on the circuit board (51) and corresponds to the fixed connection data connection wire (2) with the connection port (322).

4. The test fixture for detecting optical coupling performance according to claim 3, wherein the circuit board (51) comprises a resistor R1, a resistor R2, a resistor R3, a resistor R4, a resistor R5, a MOS transistor Q1 and a test point, one end of the resistor R1 is connected to a 1V8 power supply voltage, the other end is connected to a 4 pin of the optical coupling device (4), one end of the resistor R3 is connected to a drain D pin of the MOS transistor Q1, the other end is connected to a 3 pin of the optical coupling device (4), one end of the resistor R2 is connected to a 1V8 power supply voltage, the other end is connected to one end of the resistor R3, one end of the resistor R5 is connected to a 1 pin of the optical coupling device (4), the other end is connected to a test point, a 2 pin signal of the optical coupling device (4) is grounded, a gate G of the MOS transistor Q1 is connected to a control point, and a source S of the MOS transistor Q1 is grounded.