Light intensity self-adaptive compensation optoelectronic isolation system for high voltage measurement

Abstract

The utility model discloses a light intensity self-adaptive compensation optoelectronic isolation system for high voltage measurement, which comprises an optoelectronic isolation unit electrically connected between a high voltage side and a low voltage side, and realizes electrical isolation of the high voltage side and the low voltage side through electrical-optical-electrical conversion. The device is characterized in that the optoelectronic isolation unit comprises an optoelectronic isolator, and a light intensity detection sensor and a light intensity enhancement part are arranged between a luminous source and a photosensitive device of the optoelectronic isolator; when the light intensity detection sensor detects that the light intensity becomes weak, the light intensity enhancing component is started to enhance the light intensity so as to reduce the photoelectric conversion error. According to the utility model, through real-time detection of light intensity attenuation and triggering of dynamic light compensation, photoelectric conversion nonlinear errors caused by optical path loss or device aging are effectively inhibited, thereby substantially improving precision of high-voltage isolation measurement.

Description

Technical Field

[0001] This invention belongs to the field of high voltage measurement technology, and particularly relates to a light intensity adaptive compensation opto-isolation system for high voltage measurement. Background Technology

[0002] Existing opto-isolation devices generally adopt a fixed-drive mode opto-conversion architecture, whose output signal is susceptible to interference from multiple factors such as light source aging, optical path contamination, and temperature drift. Although some solutions mitigate performance degradation through temperature compensation circuits or redundant designs, they cannot implement real-time correction for changes in optical path intensity. Moreover, the traditional open-loop control mode reveals optical decay compensation lag during long-term operation, resulting in nonlinear errors even in high-precision measurement scenarios. Summary of the Invention

[0003] Purpose of the invention: In order to overcome the shortcomings of the existing technology, this utility model provides a light intensity adaptive compensation opto-isolation system for high voltage measurement. By detecting the light intensity attenuation in real time and triggering dynamic light compensation, it effectively suppresses the nonlinear error of photoelectric conversion caused by optical path loss or device aging, and improves the accuracy of high voltage isolation measurement.

[0004] Technical Solution: To achieve the above objectives, the present invention provides a high-voltage measurement light intensity adaptive compensation opto-isolation system, comprising an opto-isolation unit electrically connected between the high-voltage side and the low-voltage side, achieving electrical isolation between the high-voltage side and the low-voltage side through electro-optical-electrical conversion; the opto-isolation unit includes an opto-isolator, and a light intensity detection sensor and a light intensity enhancement component are disposed between the light source and the photosensitive device of the opto-isolator; when the light intensity detection sensor detects a weakening of the light intensity, the light intensity enhancement component is activated to enhance the light intensity, thereby reducing photoelectric conversion errors.

[0005] Furthermore, the response wavelength range of the light intensity detection sensor matches the wavelength of the light emitted by the light source.

[0006] Furthermore, the light intensity enhancement component is positioned after the light intensity detection sensor.

[0007] Furthermore, the light intensity detection sensor is arranged laterally relative to the light source and the photosensitive device, and measures the light intensity using scattered light.

[0008] Furthermore, the number of light intensity detection sensors is two, with one light intensity detection sensor arranged close to the light source and the other light intensity detection sensor arranged close to the photosensitive device.

[0009] Furthermore, the light intensity enhancement component is an optical amplifier.

[0010] Furthermore, the optical amplifier is disposed in the optical path between the light source and the photosensitive device.

[0011] Furthermore, it includes a PID controller corresponding to the optical amplifier, the PID controller being used to adjust the gain of the optical amplifier.

[0012] Beneficial effects: This utility model adds a light intensity detection sensor and a light intensity enhancement component to the opto-isolator to form a closed-loop compensation structure system, which can detect the light intensity attenuation in real time and trigger a dynamic light compensation mechanism, effectively suppressing the nonlinear error of photoelectric conversion caused by optical path loss or device aging, thereby significantly improving the long-term accuracy and stability of the high-voltage isolation measurement system. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the overall structure of this utility model. Detailed Implementation

[0014] The present invention will be further described below with reference to the accompanying drawings.

[0015] like Figure 1 As shown, a high-voltage measurement system with adaptive light intensity compensation opto-isolation includes an opto-isolation unit 1 electrically connected between the high-voltage side a and the low-voltage side b, achieving electrical isolation between the high-voltage side a and the low-voltage side b through electro-optical-electrical conversion. The opto-isolation unit 1 includes an opto-isolator 2, with a light intensity detection sensor 2.3 and a light intensity enhancement component 2.4 disposed between the light source 2.1 and the photosensitive device 2.2 of the opto-isolator 2. When the light intensity detection sensor 2.3 detects a weakening of the light intensity, the light intensity enhancement component 2.4 is activated to enhance the light intensity, thereby reducing photoelectric conversion errors. This invention adds a light intensity detection sensor 2.3 and a light intensity enhancement component 2.4 to the opto-isolator 2, forming a closed-loop compensation structure system. This system can detect light intensity attenuation in real time and trigger a dynamic light compensation mechanism, effectively suppressing nonlinear errors in photoelectric conversion caused by optical path loss or device aging, thus significantly improving the long-term accuracy and stability of the high-voltage isolation measurement system.

[0016] The response wavelength range of the light intensity detection sensor 2.3 matches the wavelength of the light emitted by the light source 2.1, eliminating stray light interference, such as wavelengths outside 850nm in ambient light, ensuring consistency between the detected signal and the effective signal wavelength, and improving detection accuracy. For example, if the light source 2.1 is an infrared light-emitting diode, then the light intensity detection sensor 2.3 should be selected to be sensitive to infrared light.

[0017] The light intensity enhancement component 2.4 is positioned after the light intensity detection sensor 2.3, so that light intensity is detected first and then light intensity enhancement measures are implemented, thereby improving execution accuracy.

[0018] The light intensity detection sensor 2.3 is arranged laterally relative to the light source 2.1 and the photosensitive device 2.2, and uses scattered light to measure the light intensity, thereby not blocking the main light path and avoiding light flux loss.

[0019] There are two light intensity detection sensors 2.3, one of which is positioned close to the light source 2.1, and the other is positioned close to the photosensitive device 2.2. The two light intensity detection sensors 2.3 are compared and measured, which more closely approximates the differential measurement of optical path attenuation, improving the accuracy of light intensity detection and providing more precise guidance for subsequent implementation of light intensity enhancement measures.

[0020] The light intensity enhancement component 2.4 is an optical amplifier, and it is positioned in the optical path between the light source 2.1 and the photosensitive device 2.2. Using an erbium-doped fiber amplifier (EDFA) can achieve a light intensity gain of 20 dB, which avoids the risk of LED overload compared to current regulation methods.

[0021] This invention includes a PID controller 3 corresponding to an optical amplifier. The PID controller 3 is used to adjust the gain of the optical amplifier, and the response speed is improved from milliseconds to microseconds. It supports fuzzy PID algorithm to adapt to nonlinear optical path changes.

[0022] The above description is only a preferred embodiment of the present utility model. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the principle of the present utility model, and these improvements and modifications should also be considered within the protection scope of the present utility model.

Claims

1. A high-voltage measurement optical intensity adaptive compensation opto-isolation system, comprising an opto-isolation unit (1) electrically connected between a high-voltage side (a) and a low-voltage side (b), achieving electrical isolation between the high-voltage side (a) and the low-voltage side (b) through electro-optical-electrical conversion; characterized in that: The opto-isolation unit (1) includes an opto-isolator (2). A light intensity detection sensor (2.3) and a light intensity enhancement component (2.4) are arranged between the light source (2.1) and the photosensitive device (2.2) of the opto-isolator (2). When the light intensity detection sensor (2.3) detects that the light intensity is weakening, the light intensity enhancement component (2.4) is activated to enhance the light intensity in order to reduce the photoelectric conversion error.

2. The high-voltage measurement optical intensity adaptive compensation opto-isolation system according to claim 1, characterized in that: The response wavelength range of the light intensity detection sensor (2.3) is matched with the light wavelength emitted by the light source (2.1).

3. The high-voltage measurement optical intensity adaptive compensation opto-isolation system according to claim 1, characterized in that: The light intensity enhancement component (2.4) is positioned after the light intensity detection sensor (2.3).

4. The high-voltage measurement optical intensity adaptive compensation opto-isolation system according to claim 3, characterized in that: The light intensity detection sensor (2.3) is arranged laterally relative to the light source (2.1) and the photosensitive device (2.2) to measure the light intensity using scattered light.

5. The high-voltage measurement optical intensity adaptive compensation opto-isolation system according to claim 4, characterized in that: The number of light intensity detection sensors (2.3) is two, one of which is arranged close to the light source (2.1) and the other is arranged close to the photosensitive device (2.2).

6. The high-voltage measurement optical intensity adaptive compensation opto-isolation system according to claim 1, characterized in that: The light intensity enhancement component (2.4) is an optical amplifier.

7. The high-voltage measurement optical intensity adaptive compensation opto-isolation system according to claim 6, characterized in that: The optical amplifier is positioned in the optical path between the light source (2.1) and the photosensitive device (2.2).

8. The high-voltage measurement optical intensity adaptive compensation opto-isolation system according to claim 6 or 7, characterized in that: It includes a PID controller (3) corresponding to the optical amplifier, the PID controller (3) being used to adjust the gain of the optical amplifier.

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