Photoelectric sensor, control circuit and electronic equipment

Abstract

The invention discloses a photoelectric sensor, a control circuit and electronic equipment, and relates to the technical field of photoelectric equipment, the photoelectric sensor comprises a mounting rack, a first detection layer and an outer wall, the mounting rack is annular, the mounting rack is provided with a through hole for an optical fiber to pass through, the first detection layer is arranged on the inner side surface of the mounting rack, and the outer wall is arranged on the first detection layer; the first detection layer is used for obtaining escape light and generating potential difference, and the outer wall is annularly arranged on the outer side of the mounting frame. According to the technical scheme provided by the invention, the technical problem that the detection error is large when a photoelectric sensor detects the optical power can be solved.

Description

Technical Field

[0001] This invention relates to the field of optoelectronic equipment technology, and in particular to an optoelectronic sensor, control circuit, and electronic device. Background Technology

[0002] A photoelectric sensor is a device that converts light signals into electrical signals using the photoelectric effect, and it is widely used in detection, monitoring, and control fields. In electronic devices such as lasers, photoelectric sensors are typically used to detect the optical power of optical fibers. However, traditional photoelectric sensors suffer from large detection errors when detecting optical power.

[0003] Therefore, it is necessary to provide a new photoelectric sensor, control circuit, and electronic device to solve the above-mentioned technical problems. Summary of the Invention

[0004] The main objective of this invention is to provide a photoelectric sensor, control circuit, and electronic device, which aims to solve the technical problem of large detection errors when using traditional photoelectric sensors to detect optical power.

[0005] To achieve the above objectives, the present invention provides a photoelectric sensor comprising:

[0006] The mounting bracket is ring-shaped and has through holes for optical fibers to pass through.

[0007] A first detection layer is disposed on the inner side of the mounting bracket. The first detection layer is used to acquire the escape light and generate a potential difference.

[0008] The outer wall is circumferentially disposed on the outside of the mounting bracket.

[0009] In one embodiment, the first detection layer includes a plurality of first detection sheets, all of which are evenly spaced on the inner side of the mounting frame.

[0010] In one embodiment, the mounting frame includes a plurality of first wires and a plurality of second wires, the plurality of first wires and the plurality of second wires being arranged alternately and surrounding to form a light-transmitting hole.

[0011] In one embodiment, the photoelectric sensor further includes a second detection layer, which includes a plurality of second detection plates evenly spaced on the outer side of the mounting frame, and a reflective layer is provided on the inner side of the outer wall; the reflective layer reflects the escape light that passes through the gap between any two adjacent first detection plates and the light-transmitting hole to the second detection plates.

[0012] In one embodiment, both the first detection chip and the second detection chip are photodiodes.

[0013] In one embodiment, the outer wall is an opaque component.

[0014] In one embodiment, the first detection layer includes a first detection sheet that covers the inner side of the mounting bracket.

[0015] The present invention also proposes a control circuit for use in the photoelectric sensor described above. The control circuit includes a data acquisition circuit, a logic processing unit, a control unit, and a communication circuit, wherein the data acquisition circuit, the logic processing unit, the control unit, and the communication circuit are connected in sequence. The first and second detection plates of the photoelectric sensor are both connected to the data acquisition circuit to form a closed loop.

[0016] In one embodiment, the acquisition circuit includes a sampling resistor and an amplifier, with the sampling resistor connected in parallel with the amplifier; the first and second detection plates of the photoelectric sensor are both connected to the sampling resistor, forming the closed loop.

[0017] The present invention also proposes an electronic device, comprising:

[0018] optical fiber;

[0019] The photoelectric sensor described above is encapsulated within the optical fiber;

[0020] The photoelectric processor is electrically connected to the photoelectric sensor;

[0021] A controller is electrically connected to the photoelectric processor, and the controller is used to control the operation of the photoelectric processor and to supply power to the photoelectric processor.

[0022] The technical solution of this invention designs the first detection layer as a tube, which allows it to be positioned around the outside of the optical fiber when the photoelectric sensor detects the optical power of the fiber. This increases the amount of escape light that the photoelectric sensor can acquire, reduces detection errors, and also reduces the installation difficulty and cost of the photoelectric sensor. In this embodiment, a mounting bracket is used to install structural components such as the first detection layer. The first detection layer is used to acquire escape light and generate a potential. By placing the first detection layer on the inner side of the annular mounting bracket, i.e., designing the first detection layer as a tube, it can be positioned around the outside of the optical fiber when the photoelectric sensor detects the optical power of the fiber. This increases the detection area of ​​the photoelectric sensor, increases the amount of escape light that the photoelectric sensor can acquire, and thus improves the detection accuracy of the photoelectric sensor and reduces detection errors. Furthermore, since the first detection layer is positioned around the outside of the optical fiber when the photoelectric sensor detects the optical power of the fiber, the photoelectric sensor does not need to be adjusted to a specific angle or position when detecting the optical power of the fiber. This greatly reduces the installation difficulty and cost of the photoelectric sensor when detecting the optical power of the fiber. This photoelectric sensor is applicable to the fields of optical power detection equipment, lasers, etc. Attached Figure Description

[0023] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0024] Figure 1 A schematic diagram of the structure of a photoelectric sensor in one embodiment of the present invention;

[0025] Figure 2 A cross-sectional view of the mounting bracket, the first detection layer, and the second detection layer in one embodiment of the present invention;

[0026] Figure 3 A circuit diagram of the control circuit in one embodiment of the present invention;

[0027] Figure 4 A structural diagram of an electronic device according to an embodiment of the present invention.

[0028] Explanation of icon numbers:

[0029] 100, Mounting bracket; 110, Through hole; 200, First detection layer; 210, First detection piece; 211, Gap; 212, Photodiode; 300, Outer wall; 400, Second detection layer; 410, Second detection piece; 500, Control circuit; 510, Acquisition circuit; 511, Sampling resistor; 512, Amplifier; 520, Logic processing unit; 530, Control unit; 540, Communication circuit; 550, Protection circuit; 600, Electronic equipment; 610, Optical fiber; 620, Photoelectric sensor; 630, Photoelectric processor; 640, Controller.

[0030] The realization of the objective, functional features and advantages of the present invention will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0031] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present invention.

[0032] It should be noted that all directional indications (such as up, down, left, right, front, back, etc.) in the embodiments of the present invention are only used to explain the relative positional relationship and movement of each component in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indication will also change accordingly.

[0033] Furthermore, if the embodiments of the present invention involve descriptions such as "first" or "second," these descriptions are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include at least one of those features. Additionally, if "and / or" or "and / or" appears throughout the text, its meaning includes three parallel solutions. For example, "A and / or B" includes solution A, solution B, or a solution where both A and B are satisfied simultaneously.

[0034] Furthermore, the technical solutions of the various embodiments of the present invention can be combined with each other, but only if they are feasible for those skilled in the art. If the combination of technical solutions is contradictory or cannot be implemented, it should be considered that such combination of technical solutions does not exist and is not within the scope of protection claimed by the present invention.

[0035] A photoelectric sensor is a device that converts light signals into electrical signals using the photoelectric effect, and it is widely used in detection, monitoring, and control fields. In electronic devices such as lasers, photoelectric sensors are commonly used to detect the optical power of optical fibers. In actual research and development and production, researchers have found that when using photoelectric sensors to detect the optical power of optical fibers, multiple sensors are typically installed on the outer periphery of the fiber to capture scattered light and calculate the optical power. However, due to the limited number of sensors, the amount of scattered light that can be captured by the photoelectric sensor is very limited, resulting in a large detection error in the optical power detected by the sensor after photoelectric conversion. Furthermore, to maximize the amount of scattered light captured by the photoelectric sensor, it is usually necessary to install the sensor at a specific location on the fiber (such as a straight section of the fiber), and in some cases, it is even necessary to strip the fiber's coating to create a window for the sensor, which increases the installation difficulty. Escape light refers to light of various wavelengths that escapes from the coating of the optical fiber.

[0036] This invention proposes a photoelectric sensor, control circuit, and electronic device, aiming to solve the technical problem of large detection error when using traditional photoelectric sensors to detect optical power.

[0037] Please see Figures 1 to 2 In one embodiment of the present invention, the photoelectric sensor 620 includes a mounting frame 100, a first detection layer 200 and an outer wall 300. The mounting frame 100 is annular and has a through hole 110 for the optical fiber 610 to pass through. The first detection layer 200 is disposed on the inner side of the mounting frame 100 and is used to acquire escape light and generate a potential difference. The outer wall 300 is arranged around the outer side of the mounting frame 100.

[0038] The technical solution of this invention, by designing the first detection layer 200 as a tube, enables the first detection layer 200 to be arranged around the outside of the optical fiber 610 when the photoelectric sensor 620 detects the optical power of the optical fiber 610, thereby increasing the amount of escape light that the photoelectric sensor 620 can acquire and reducing detection errors. In this embodiment, the mounting bracket 100 is used to install structural components such as the first detection layer 200. The first detection layer 200 is used to acquire escape light and generate potential; by setting the first detection layer 200 on the inner side of the annular mounting bracket 100, that is, designing the first detection layer 200 as a tube, the first detection layer 200 can be arranged around the outside of the optical fiber 610 when the photoelectric sensor 620 detects the optical power of the optical fiber 610, thereby increasing the detection area of ​​the photoelectric sensor 620, increasing the amount of escape light that the photoelectric sensor 620 can acquire, and thus improving the detection accuracy of the photoelectric sensor 620 and reducing detection errors. Furthermore, since the first detection layer 200 is arranged around the outside of the optical fiber 610 when the photoelectric sensor 620 detects the optical power of the optical fiber 610, the photoelectric sensor 620 does not need to be adjusted to a specific position when detecting the optical power of the optical fiber 610, which greatly reduces the installation difficulty of the photoelectric sensor 620 when detecting the optical power of the optical fiber 610. This photoelectric sensor 620 is used in the fields of optical power detection equipment, lasers, etc.

[0039] It should be noted that when using this photoelectric sensor to detect the optical power of an optical fiber, it is not necessary to strip the fiber's coating. This significantly reduces light escape caused by coating removal, ensuring photoelectric efficiency. Furthermore, it also reduces heat buildup caused by coating removal. In practical applications, users can, according to actual needs, strip the coating from a section of the optical fiber and then encase the photoelectric sensor within the stripped fiber, further reducing detection errors. The principle of the photoelectric sensor 620 for detecting the optical power of the optical fiber 610 is as follows: When the optical power sensor is fitted onto the optical fiber 610, the escape light from the optical fiber 610 irradiates the first detection layer 200. The first detection layer 200 can form a potential difference when irradiated by the escape light. By connecting the first detection layer 200 in series with the sampling resistor 511, a closed loop can be formed, and the potential difference formed by the first detection layer 200 can be converted into a current. Subsequently, through the acquisition circuit 510 and the logic processing unit 520, the potential difference of the first detection layer 200 can be converted into a digital quantity that can characterize the light intensity sensed by the first detection layer 200, thereby realizing the optical power detection of the optical fiber 610.

[0040] Please see Figure 2In one embodiment of the present invention, the first detection layer 200 includes a plurality of first detection sheets 210, all of which are evenly spaced on the inner side of the mounting frame 100. In this embodiment, the first detection layer 200 is composed of a plurality of first detection sheets 210. By evenly arranging all the first detection sheets 210 on the inner side of the mounting frame 100, the first detection layer 200 can be positioned around the outer side of the optical fiber 610 when the photoelectric sensor 620 detects the optical power of the optical fiber 610, thereby increasing the amount of escape light acquired by the photoelectric sensor 620, and thus improving the detection accuracy of the photoelectric sensor 620 and reducing detection errors. It should be noted that when assembling the photoelectric sensor 620, the gap 211 between any two adjacent first detection sheets 210 should be minimized as much as possible to allow the first detection sheet 210 to acquire as much escape light as possible.

[0041] Please see Figure 2 In one embodiment of the present invention, the mounting frame 100 includes a plurality of first wires and a plurality of second wires, which are arranged alternately to form light-transmitting holes. The photoelectric sensor 620 further includes a second detection layer 400, which includes a plurality of second detection plates 410 evenly spaced on the outer side of the mounting frame 100, and a reflective layer is provided on the inner side of the outer wall 300; the reflective layer reflects the escape light that passes through the gap 211 between any two adjacent first detection plates 210 and the light-transmitting holes to the second detection plates 410. In this embodiment, the mounting frame 100 is composed of a plurality of first wires and a plurality of second wires arranged alternately, that is, the mounting frame 100 is designed as a mesh. By designing the mounting bracket 100 as a mesh and providing a reflective layer on the inner side of the outer wall 300, the escape light passing through the gap 211 between any two adjacent first detection pieces 210 and the light-transmitting hole can be reflected to the second detection piece 410, thereby increasing the amount of escape light that the photoelectric sensor 620 can acquire and improving the detection accuracy of the photoelectric sensor 620. In a specific embodiment, in order to allow the second detection piece 410 to acquire as much escape light as possible, the second detection piece 410 should avoid blocking the gap 211 between any two adjacent first detection pieces 210 as much as possible; specifically, multiple second detection pieces 410 are arranged in a one-to-one correspondence with multiple first detection pieces 210. At the same time, the first and second wires constituting the mounting bracket 100 can also be designed as transparent parts, that is, the first and second wires are made of transparent materials to reduce the obstruction of the escape light passing through the gap 211 between any two adjacent first detection pieces 210 by the mounting bracket 100. In a specific embodiment, the reflective layer can be a metal coating with high reflectivity to the laser frequency band, such as silver.

[0042] Please see Figure 2 and Figure 4In one embodiment of the present invention, both the first detection chip 210 and the second detection chip 410 are photodiodes 212. In this embodiment, the photodiode 212 is a semiconductor device capable of converting optical signals into electrical signals. In a specific embodiment, the first detection chip 210 and the second detection chip 410 can be avalanche photodiodes or PIN photodiodes.

[0043] In one embodiment of the present invention, the outer wall 300 is an opaque component. In this embodiment, by using an opaque material to make the outer wall 300, the internal environment of the photoelectric sensor 620 can be isolated from the external environment, thereby reducing interference from external stray light and ensuring the detection accuracy of the photoelectric sensor 620.

[0044] In another embodiment of the present invention, the first detection layer 200 includes a first detection sheet 210, which covers the inner surface of the mounting bracket 100. In this embodiment, the first detection layer 200 is designed as a complete first detection sheet 210, which can better cover the inner surface of the mounting bracket 100, thereby improving the escape light that the photoelectric sensor 620 can acquire, and thus improving the detection accuracy of the photoelectric sensor 620 and reducing the detection error.

[0045] Please see Figure 3 , Figure 3The present invention provides a circuit diagram of a control circuit 500 in one embodiment of the invention. The present invention also proposes a control circuit 500 applied to the aforementioned photoelectric sensor 620. The control circuit 500 includes a data acquisition circuit 510, a logic processing unit 520, a control unit 530, and a communication circuit 540. The data acquisition circuit 510, the logic processing unit 520, the control unit 530, and the communication circuit 540 are connected in sequence. The first detection piece 210 and the second detection piece 410 of the photoelectric sensor 620 are both connected to the data acquisition circuit 510 to form a closed loop. In this embodiment, the acquisition circuit 510 is connected to each detection chip to form a closed loop, converting the potential difference generated by each detection chip into a voltage. The logic processing unit 520 acquires the voltage output by the acquisition circuit 510 and converts it into a digital quantity that characterizes the light intensity sensed by each detection chip. The control unit 530 embeds an MCU (MCU refers to a microcontroller unit, which is a microcomputer system integrating a processor core, memory, and various input / output peripherals), and has functions such as time-division conversion, current aggregation, fault detection, and temperature monitoring. Furthermore, the control unit 530 interacts with the outside world via a bus protocol through a digital communication circuit 540. The communication circuit 540 is connected to the control unit 530 and communicates with external devices so that the external devices can acquire light power, temperature, and status fault light information. In a specific embodiment, the logic processing unit 520 may be an AD converter, and the control circuit 500 also includes a power supply circuit. The power supply circuit receives energy from an external power source and converts it into different voltages to provide energy support for the acquisition circuit 510, the logic processing unit 520, the control unit 530, and the communication circuit 540.

[0046] Please see Figure 3 In another embodiment of the present invention, the acquisition circuit 510 includes a sampling resistor 511 and an amplifier 512, with the sampling resistor 511 and amplifier 512 connected in parallel. The first detection element 210 and the second detection element 410 of the photoelectric sensor 620 are both connected to the sampling resistor 511, forming a closed loop. In this embodiment, the sampling resistor 511 is connected to each detection element to form a closed loop; the amplifier 512 is connected in parallel with the sampling resistor 511 and is used to amplify the voltage across the sampling resistor 511. In a specific embodiment, a resistor can be included in the acquisition circuit 510 to amplify the voltage across the sampling resistor 511.

[0047] Please see Figure 3In this embodiment, to better protect the control circuit 500, a protection circuit 550 is provided between the acquisition circuit 510 and the logic processing unit 520. The protection circuit 550 is a TVS protection circuit 550 (a semiconductor device used to protect electronic circuits from damage by transient voltages). It mainly uses a TVS (Transient Voltage Suppressor) diode to clamp and prevent excessively high voltages from being input to the pins of the logic processing unit 520. In addition, the protection circuit 550 includes a resistor, which, together with the capacitor of the protection circuit 550, forms a filter circuit to filter out high-frequency interference.

[0048] Please see Figure 4 The present invention also proposes an electronic device 600, which includes the aforementioned photoelectric sensor 620. The specific structure of the photoelectric sensor 620 is as described in the above embodiments. Since the electronic device 600 adopts all the technical solutions of all the above embodiments, it has at least all the beneficial effects brought about by the technical solutions of the above embodiments, and will not be described in detail here. The electronic device 600 includes an optical fiber 610, a photoelectric sensor 620, a photoelectric processor 630, and a controller 640. The photoelectric sensor 620 is covered by the optical fiber 610. The photoelectric processor 630 is electrically connected to the photoelectric sensor 620, and the controller 640 is electrically connected to the photoelectric processor 630. The controller 640 is used to control the operation of the photoelectric processor 630 and to supply power to the photoelectric processor 630. In a specific embodiment, the electronic device 600 may be a laser.

[0049] The above description is merely an exemplary embodiment of the present invention and does not limit the scope of protection of the present invention. Any equivalent structural transformations made based on the technical concept of the present invention and the contents of the specification and drawings of the present invention, or direct / indirect applications in other related technical fields, are included within the scope of protection of the present invention.

Claims

1. A photoelectric sensor, characterized in that, include: The mounting bracket is ring-shaped and has through holes for optical fibers to pass through. A first detection layer is disposed on the inner side of the mounting bracket. The first detection layer is used to acquire the escape light and generate a potential difference. The outer wall is circumferentially disposed on the outside of the mounting bracket.

2. The photoelectric sensor as described in claim 1, characterized in that, The first detection layer includes a plurality of first detection pieces, all of which are evenly spaced on the inner side of the mounting bracket.

3. The photoelectric sensor as described in claim 2, characterized in that, The mounting frame includes multiple first lines and multiple second lines, which are arranged alternately and surround to form light-transmitting holes.

4. The photoelectric sensor as described in claim 3, characterized in that, The photoelectric sensor further includes a second detection layer, which includes a plurality of second detection plates evenly spaced on the outer side of the mounting frame, and a reflective layer is provided on the inner side of the outer wall; the reflective layer reflects the escape light that passes through the gap between any two adjacent first detection plates and the light-transmitting hole to the second detection plates.

5. The photoelectric sensor as described in claim 4, characterized in that, Both the first detection chip and the second detection chip are photodiodes.

6. The photoelectric sensor as described in claim 1, characterized in that, The outer wall is an opaque component.

7. The photoelectric sensor as described in claim 1, characterized in that, The first detection layer includes a first detection sheet, which covers the inner side of the mounting bracket.

8. A control circuit applied to a photoelectric sensor as described in any one of claims 1 to 7, characterized in that, The control circuit includes a data acquisition circuit, a logic processing unit, a control unit, and a communication circuit, which are connected in sequence. The first and second detection plates of the photoelectric sensor are both connected to the data acquisition circuit to form a closed loop.

9. The control circuit as described in claim 8, characterized in that, The acquisition circuit includes a sampling resistor and an amplifier, with the sampling resistor connected in parallel with the amplifier; the first and second detection plates of the photoelectric sensor are both connected to the sampling resistor, forming the closed loop.

10. An electronic device, characterized in that, include: optical fiber; The photoelectric sensor as described in any one of claims 1 to 7, wherein the photoelectric sensor is covered by the optical fiber; The photoelectric processor is electrically connected to the photoelectric sensor; A controller is electrically connected to the photoelectric processor, and the controller is used to control the operation of the photoelectric processor and to supply power to the photoelectric processor.

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