Power supply and output signal full-isolation light curtain device

Abstract

The utility model discloses a power supply and output signal full-isolation light curtain device, which comprises a first shielding shell, a light curtain illuminator, a second shielding shell and a light curtain light receiver, a first circuit board is arranged in the first shielding shell, a first power supply isolation module and a photoelectric isolation module are welded on the first circuit board, and a second power supply isolation module is welded on the second circuit board. The light curtain illuminator is electrically connected with the first circuit board and installed in the first shielding shell, the second circuit board is installed in the second shielding shell, a second power supply isolation module and an optical coupler isolation module are welded to the second circuit board, and the light curtain light receiver is electrically connected with the second circuit board and installed in the second shielding shell; the first power supply isolation module and the second power supply isolation module perform isolation processing on a power supply, and the photoelectric isolation module and the optical coupler isolation module perform isolation processing on output signals, so that the problems of electromagnetic interference, signal source pollution and the like can be prevented, and the light curtain can be used in a more complex environment.

Description

Technical Field

[0001] The utility model relates to the technical field of light curtain, in particular to a light curtain device with fully isolated power supply and output signal. Background Technique

[0002] The light curtain infrared sensor is a safety protection device. It emits infrared light beams through a light emitter and receives the infrared light beams through a receiver to form an infrared light curtain protection wall. When one of the light beams in the light curtain is blocked, the sensor will send a signal to stop the running equipment or give an alarm, thus avoiding safety accidents.

[0003] The measuring light curtain is a light curtain derived from the light curtain with higher precision and higher technical requirements. It is measured by single or multiple sets of sensors and transmits various signals used for communication.

[0004] In the related technology, when the light curtain is applied, there are often strong electromagnetic devices such as servo motors and frequency converters in the industrial environment. These devices will generate electromagnetic radiation during operation, interfering with the signal transmission of the light curtain sensor and causing the sensor to malfunction or be unable to work stably. There may be various signal sources in the industrial environment, such as radio waves and high-frequency noise. These signal sources may contaminate the signals of the light curtain sensor. Therefore, a fully isolated light curtain with anti-interference is needed. Summary of the Invention

[0005] The purpose of the utility model is to provide a light curtain device with fully isolated power supply and output signal to solve the problems put forward in the above background technique.

[0006] To achieve the above purpose, the utility model provides the following technical scheme: A light curtain device with fully isolated power supply and output signal, including a first shielding case, a first circuit board is installed inside the first shielding case, and a first power isolation module and an optoelectronic isolation module are soldered on the first circuit board;

[0007] A light curtain emitter, the light curtain emitter is electrically connected to the first circuit board and installed inside the first shielding case; the first shielding case conducts overall shielding protection on the light curtain emitter to resist external interference and improve the stability of the light curtain emitter; 〔

[0008] A second shielding case, a second circuit board is installed inside the second shielding case, and a second power isolation module and an optocoupler isolation module are soldered on the second circuit board;

[0009] A light curtain photoreceptor, the light curtain photoreceptor is electrically connected to the second circuit board and installed inside the second shielding case; the second shielding case conducts overall shielding on the light curtain photoreceptor to ensure that the light curtain photoreceptor stably receives the infrared light beam emitted by the light curtain emitter.

[0010] Further, a shielded wire is electrically connected between the first circuit board and the second circuit board. The shielded wire can resist external electromagnetic interference and the signal transmission is not affected.

[0011] Further, the first power isolation module and the second power isolation module are connected to 24V direct current. The first power isolation module and the second power isolation module are used to resist interference for the input and output of electricity, so as to achieve the effect of anti-interference for the input and output of electricity. The photoelectric isolation module and the optocoupler isolation module transmit the light curtain synchronization signal, and the optocoupler isolation module isolates the light curtain output signal, improving the overall anti-interference ability of the light curtain and ensuring the normal use of the light curtain in a complex industrial environment.

[0012] Compared with the prior art, the beneficial effects of the present utility model are as follows: The first shielding case shields the first power isolation module, the photoelectric isolation module, and the light curtain emitter; the second shielding case shields the second power isolation module, the optocoupler isolation module, and the light curtain photoreceptor. The first power isolation module and the second power isolation module perform isolation processing on the power supply, and the photoelectric isolation module and the optocoupler isolation module perform isolation processing on the output signal, which can prevent problems such as electromagnetic interference and signal source pollution, and the light curtain can be used in a more complex environment. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a schematic diagram of the principle of the present utility model.

[0014] In the figure: 1. First shielding case; 2. First circuit board; 3. First power isolation module; 4. Photoelectric isolation module; 5. Second shielding case; 6. Second circuit board; 7. Second power isolation module; 8. Optocoupler isolation module; 9. Light curtain emitter; 10. Light curtain photoreceptor; 11. Shielded wire. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0015] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present utility model. Embodiment

[0016] Please refer to Figure 1, the present utility model provides a technical solution: a light curtain device with fully isolated power supply and output signals, including a first shielding case 1, inside which a first circuit board 2 is installed. A first power isolation module 3 and an opto-isolation module 4 are soldered on the first circuit board 2. The first power isolation module 3 isolates the power supply to ensure stable power input and output and is not prone to fluctuations. The first shielding case 1 shields the internal components to enhance the shielding effect;

[0017] A light curtain emitter 9, which is electrically connected to the first circuit board 2 and installed inside the first shielding case 1. The light curtain emitter 9 emits infrared beams;

[0018] A second shielding case 5, inside which a second circuit board 6 is installed. A second power isolation module 7 and an opto-coupler isolation module 8 are soldered on the second circuit board 6. The second power isolation module 7 ensures stable power supply for the light curtain receiver 10;

[0019] A light curtain receiver 10, which is electrically connected to the second circuit board 6 and installed inside the second shielding case 5. The light curtain receiver 10 receives the infrared beams emitted by the light curtain emitter 9.

[0020] In this embodiment, as Figure 1 shown, a shielded wire 11 is electrically connected between the first circuit board 2 and the second circuit board 6. The shielded wire 11 improves the stability of signal synchronization and will not have large fluctuations.

[0021] In this embodiment, as Figure 1 shown, the first power isolation module 3 and the second power isolation module 7 are connected to 24V DC power. The first power isolation module 3 and the second power isolation module 7 play an anti-interference role in the power input and output. When supplying power to the first circuit board 2 and the second circuit board 6, the power supply stability can be ensured.

[0022] In this embodiment, as Figure 1 shown, the opto-isolation module 4 and the opto-coupler isolation module 8 transmit the light curtain synchronization signal. The opto-coupler isolation module 8 isolates the light curtain output signal to avoid external electromagnetic interference to the transmission of the light curtain output signal.

[0023] In this embodiment, as Figure 1 shown, the input power and output power of the first power isolation module 3 and the second power isolation module 7 both carry GND. The first power isolation module 3 and the second power isolation module 7 are grounded through GND, which can prevent electric leakage accidents caused by insulation damage inside the light curtain.

[0024] Specifically, during use, the external 24V DC power first undergoes isolation processing through the first power isolation module 3 and the second power isolation module and then is transmitted to the first circuit board 2 and the second circuit board 6, realizing the function of internal and external power isolation and having good power supply stability; the optoelectronic isolation module 4 and the optocoupler isolation module 8 realize the isolation of the light curtain signal, realizing the function of internal and external signal source isolation, and the light curtain signal transmission is not easily interfered; the first shielding case 1 and the second shielding case 5 play a role in housing shielding, enabling the light curtain to operate normally and stably in a complex industrial environment.

[0025] Although the embodiments of the present invention have been shown and described, for those of ordinary skill in the art, it can be understood that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principle and spirit of the present invention, and the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A light curtain device with full isolation of power supply and output signal, characterized in that, Including: A first shielding case (1), inside which a first circuit board (2) is installed, and a first power isolation module (3) and an optoelectronic isolation module (4) are soldered on the first circuit board (2); A light curtain emitter (9), which is electrically connected to the first circuit board (2) and installed inside the first shielding case (1); A second shielding case (5), inside which a second circuit board (6) is installed, and a second power isolation module (7) and an optocoupler isolation module (8) are soldered on the second circuit board (6); A light curtain receiver (10), which is electrically connected to the second circuit board (6) and installed inside the second shielding case (5).

2. The light curtain device with fully isolated power supply and output signal according to claim 1, characterized in that: A shielded wire (11) is electrically connected between the first circuit board (2) and the second circuit board (6).

3. A light curtain device with fully isolated power supply and output signals, characterized in that: The first power isolation module (3) and the second power isolation module (7) are connected to 24V DC power supply, and the first power isolation module (3) and the second power isolation module (7) play an anti-interference role in the input and output of power.

4. A light curtain device with fully isolated power supply and output signals, characterized in that: A light curtain synchronization signal is transmitted between the optoelectronic isolation module (4) and the optocoupler isolation module (8), and the optocoupler isolation module (8) isolates the light curtain output signal.

5. A light curtain device with fully isolated power supply and output signals, characterized in that: Both the input power and the output power of the first power isolation module (3) and the second power isolation module (7) are grounded (GND).

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