Optocoupler detection circuit

Abstract

The utility model relates to the technical field of element testing, and provides an optocoupler detection circuit, which comprises a time-base integrated circuit U1, an indicator light circuit, a power supply interface USB1 and a probe SK1, the probe SK1 is respectively connected with the time-base integrated circuit and the indicator light circuit, the power supply interface USB1 is respectively connected with the time-base integrated circuit, the indicator light circuit and the probe SK1, the probe SK1 is connected with an optocoupler to be tested, and the optocoupler to be tested is connected with the time-base integrated circuit U1. The to-be-tested optical coupler and the time-base integrated circuit form a test loop, in the test loop, indication information of the indicating lamp circuit is used as judgment of a test result, maintenance personnel can conveniently and rapidly judge whether the optical coupler is good or not, and the whole optical coupler detection circuit is simple in structure, small in size and convenient to carry.

Description

Technical Field

[0001] The utility model belongs to the technical field of component testing, and in particular relates to an optical coupler detection circuit. Background Art

[0002] Optical Coupler (OC), also known as photoelectric isolator, or optocoupler for short. Optical coupler uses light as the medium to transmit electrical signals. It has a good isolation effect on input and output electrical signals, so it is widely used in various circuits. At present, optical coupler has become one of the most diverse and widely used optoelectronic devices. Optical coupler generally consists of three parts: light emission, light reception and signal amplification. The input electrical signal drives the light emitting diode (LED) to emit light of a certain wavelength, which is received by the photodetector to generate photocurrent, and then output after further amplification. This completes the conversion of electricity-light-electricity, thereby playing the role of input, output and isolation. Since the input and output of the optical coupler are isolated from each other, the electrical signal transmission has the characteristics of unidirectionality, so it has good electrical insulation and anti-interference ability. And because the input end of the optical coupler is a low-resistance element working in the current mode, it has a strong common-mode suppression ability. Therefore, it can greatly improve the signal-to-noise ratio as a terminal isolation element in long-line information transmission. As a signal isolation interface device in computer digital communication and real-time control, it can greatly increase the reliability of computer operation.

[0003] Currently, for testing optocouplers, two multimeters are usually used to test both ends of the optocoupler at the same time to determine whether the optocoupler is good or bad. However, this method of testing optocouplers has the following problems: the test is inconvenient, the test speed is slow, and the multimeter is easy to carry. Utility Model Content

[0004] In view of the defects in the prior art, the utility model provides an optocoupler detection circuit, which aims to solve the problems of inconvenient testing, slow testing speed and easy portability of the multimeter in the prior art test method of the optocoupler.

[0005] The technical solution provided by the utility model is: an optocoupler detection circuit, including a time base integrated circuit U1, an indicator light circuit, a power supply interface USB1 and a probe SK1, wherein:

[0006] The probe SK1 is connected to the timing integrated circuit and the indicator light circuit respectively, the power supply interface USB1 is connected to the timing integrated circuit, the indicator light circuit and the probe SK1 respectively, the probe SK1 is connected to the optical coupler to be tested, and the optical coupler to be tested and the timing integrated circuit form a test loop.

[0007] As an improved solution, the probe SK1 includes pin 1, pin 2, pin 3 and pin 4;

[0008] The line led out from the pin 1 is connected in series with the resistor R1 and then connected to the pin 3 of the time base integrated circuit U1;

[0009] The line led out from the pin 2 is connected in series with the indicator light circuit and then connected to the pin 4 of the time base integrated circuit U1;

[0010] The line led out from the pin 3 is connected in series with the capacitor C2 and then connected to the pin 5 of the time base integrated circuit U1;

[0011] The line led out from the pin 4 is connected in series with the capacitor C1 and the pin 6 of the time base integrated circuit U1.

[0012] As an improved solution, the indicator light circuit includes an indicator light LED and a resistor R2 connected in series, wherein the resistor R2 is close to one side of the time base integrated circuit U1.

[0013] As an improved solution, a first circuit node and a second circuit node are sequentially provided on the line between the pin 6 of the time base integrated circuit U1 and the capacitor C1;

[0014] The line led out from the first circuit node is connected to the pin 2 of the time base integrated circuit U1, and the line led out from the second circuit node is connected to the pin 7 of the time base integrated circuit U1 after being connected in series with the resistor R4.

[0015] As an improved solution, a third circuit node is provided on the line between the resistor R4 and the pin 7 of the time base integrated circuit U1;

[0016] The line led out from the third circuit node is connected in series with a resistor R3 and then connected to the pin 8 of the timing integrated circuit U1.

[0017] As an improved solution, a fourth circuit node is provided on the line between the resistor R3 and the pin 8 of the time base integrated circuit U1;

[0018] The line led out from the fourth circuit node is connected to pin 1 of the power supply interface USB1.

[0019] As an improved solution, a fifth circuit node is provided on the line between the fourth circuit node and pin 1 of the power supply interface USB1;

[0020] The line led out from the fifth circuit node is connected to pin 4 of the time-base integrated circuit U1 , and the line led out from pin 2 of the power supply interface USB1 is connected to pin 1 of the time-base integrated circuit U1 .

[0021] In the utility model, the optocoupler detection circuit includes a timing integrated circuit U1, an indicator light circuit, a power supply interface USB1 and a probe SK1. The probe SK1 is respectively connected to the timing integrated circuit and the indicator light circuit. The power supply interface USB1 is respectively connected to the timing integrated circuit, the indicator light circuit and the probe SK1. The probe SK1 is connected to the optocoupler to be tested, and the optocoupler to be tested and the timing integrated circuit form a test loop. In the test loop, the indication information of the indicator light circuit is used as a judgment of the test result, which is convenient for maintenance personnel to quickly judge the quality of the optocoupler. In addition, the entire optocoupler detection circuit has a simple structure, a small size, and is easy to carry. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the specific implementation of the utility model or the technical solution in the prior art, the following is a brief introduction to the drawings required for the specific implementation or the prior art description. In all the drawings, similar elements or parts are generally identified by similar reference numerals. In the drawings, each element or part is not necessarily drawn according to the actual scale.

[0023] Figure 1 It is a structural block diagram of the optocoupler detection circuit provided by the utility model;

[0024] Figure 2 The utility model provides a circuit diagram of an optocoupler detection circuit. DETAILED DESCRIPTION

[0025] The following embodiments of the technical solution of the utility model are described in detail in conjunction with the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solution of the utility model, and are therefore only used as examples, and cannot be used to limit the protection scope of the utility model.

[0026] Figure 1 It is a structural block diagram of the optocoupler detection circuit provided by the utility model, wherein only the parts related to the utility model are shown in the figure.

[0027] The optocoupler detection circuit includes a timing integrated circuit U1, an indicator light circuit, a power supply interface USB1 and a probe SK1, wherein:

[0028] The probe SK1 is connected to the timing integrated circuit and the indicator light circuit respectively, the power supply interface USB1 is connected to the timing integrated circuit, the indicator light circuit and the probe SK1 respectively, the probe SK1 is connected to the optical coupler to be tested, and the optical coupler to be tested and the timing integrated circuit form a test loop.

[0029] The utility model concentrates all the electronic components of the optocoupler detection circuit on a small circuit board, which is wrapped with a transparent heat shrink tube on the outside, so as to protect the safety of the user and prevent the risk of electric shock. Through the flashing of the indicator light circuit, the user and maintenance personnel can quickly judge whether the optocoupler device is good or bad.

[0030] like Figure 2 As shown, the probe SK1 includes pin 1, pin 2, pin 3 and pin 4;

[0031] The line led out from pin 1 of probe SK1 is connected in series with resistor R1 and then connected to pin 3 of time base integrated circuit U1;

[0032] The line led out from pin 2 of probe SK1 is connected in series with the indicator light circuit and then connected to pin 4 of the time base integrated circuit U1;

[0033] The line led out from pin 3 of probe SK1 is connected in series with capacitor C2 and then connected to pin 5 of time base integrated circuit U1;

[0034] The line led out from the pin 4 of the probe SK1 is connected in series with the capacitor C1 and the pin 6 of the time base integrated circuit U1.

[0035] In this embodiment, the indicator light circuit includes an indicator light LED and a resistor R2 connected in series, wherein the resistor R2 is close to one side of the time base integrated circuit U1.

[0036] Combination Figure 2 As shown, a first circuit node and a second circuit node are sequentially arranged on the line between the pin 6 of the time base integrated circuit U1 and the capacitor C1;

[0037] The line led out from the first circuit node is connected to the pin 2 of the time base integrated circuit U1, and the line led out from the second circuit node is connected in series with the resistor R4 and then connected to the pin 7 of the time base integrated circuit U1;

[0038] Wherein, a third circuit node is provided on the line between the resistor R4 and the pin 7 of the time base integrated circuit U1;

[0039] The line led out from the third circuit node is connected in series with a resistor R3 and then connected to the pin 8 of the time base integrated circuit U1;

[0040] A fourth circuit node is provided on the line between the resistor R3 and the pin 8 of the time base integrated circuit U1;

[0041] The line led out from the fourth circuit node is connected to pin 1 of the power supply interface USB1;

[0042] A fifth circuit node is provided on the line between the fourth circuit node and pin 1 of the power supply interface USB1;

[0043] The line led out from the fifth circuit node is connected to pin 4 of the time base integrated circuit U1 , and the line led out from pin 2 of the power supply interface USB1 is connected to pin 1 of the time base integrated circuit U1 .

[0044] Combination Figure 2 As shown, when the optocoupler is good, the LED in the indicator light circuit composed of resistor R2 and LED will keep flashing. When the optocoupler is defective, the LED will not light up, which makes it convenient to test and observe the results.

[0045] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the above embodiments, those skilled in the art should understand that the technical solutions described in the above embodiments can still be modified, or some or all of the technical features can be replaced by equivalents. These modifications or replacements do not deviate the essence of the corresponding technical solutions from the scope of the technical solutions of the embodiments of the present invention, and they should all be included in the scope of the claims and specification of the present invention.

Claims

1. An optocoupler detection circuit, characterized in that: It includes a time base integrated circuit U1, an indicator light circuit, a power supply interface USB1 and a probe SK1, wherein: The probe SK1 is connected to the timing integrated circuit and the indicator light circuit respectively, the power supply interface USB1 is connected to the timing integrated circuit, the indicator light circuit and the probe SK1 respectively, the probe SK1 is connected to the optical coupler to be tested, and the optical coupler to be tested and the timing integrated circuit form a test loop.

2. The optocoupler detection circuit according to claim 1, characterized in that: The probe SK1 includes pin 1, pin 2, pin 3 and pin 4; The line led out from the pin 1 is connected in series with the resistor R1 and then connected to the pin 3 of the time base integrated circuit U1; The line led out from the pin 2 is connected in series with the indicator light circuit and then connected to the pin 4 of the time base integrated circuit U1; The line leading out of the pin 3 is connected in series with the capacitor C2 and then connected to the pin 5 of the time base integrated circuit U1; The line leading out from the pin 4 is connected in series with the capacitor C1 and is connected to the pin 6 of the time base integrated circuit U1.

3. The optocoupler detection circuit according to claim 2, characterized in that: The indicator light circuit includes an indicator light LED and a resistor R2 connected in series, wherein the resistor R2 is close to one side of the time base integrated circuit U1.

4. The optocoupler detection circuit according to claim 2, characterized in that: A first circuit node and a second circuit node are sequentially arranged on the line between the pin 6 of the time base integrated circuit U1 and the capacitor C1; The line led out from the first circuit node is connected to the pin 2 of the time base integrated circuit U1, and the line led out from the second circuit node is connected to the pin 7 of the time base integrated circuit U1 after being connected in series with the resistor R4.

5. The optocoupler detection circuit according to claim 4, characterized in that: A third circuit node is provided on the line between the resistor R4 and the pin 7 of the time base integrated circuit U1; The line led out from the third circuit node is connected in series with a resistor R3 and then connected to the pin 8 of the timing integrated circuit U1.

6. The optocoupler detection circuit according to claim 4, characterized in that: A fourth circuit node is provided on the line between the resistor R3 and the pin 8 of the time base integrated circuit U1; The line led out from the fourth circuit node is connected to pin 1 of the power supply interface USB1.

7. The optocoupler detection circuit according to claim 6, characterized in that: A fifth circuit node is provided on the line between the fourth circuit node and pin 1 of the power supply interface USB1; The line led out from the fifth circuit node is connected to pin 4 of the time-base integrated circuit U1 , and the line led out from pin 2 of the power supply interface USB1 is connected to pin 1 of the time-base integrated circuit U1 .

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