Inductive switch with high detection range

Abstract

The utility model relates to the technical field of inductive switches, and discloses an inductive switch with a high detection range, which comprises a base, a circuit board is mounted on the base, an infrared sensor is mounted on the circuit board and electrically connected with the circuit board, and at least three ultrasonic detectors are further mounted on the circuit board and electrically connected with the circuit board. The plurality of ultrasonic detectors are distributed around the infrared sensor, the plurality of ultrasonic detectors are electrically connected with the circuit board, the included angle between the detection direction of the ultrasonic detectors and the detection direction of the infrared sensor is between 0 degree and 90 degrees, and the ultrasonic detectors and the infrared sensor are integrated on the same circuit board. Meanwhile, the included angle between the detection direction of the ultrasonic detector and the detection direction of the infrared sensor is between 0 degree and 90 degrees, so that the target object can be timely and accurately detected no matter which direction the target object approaches, the detection range of the inductive switch is enlarged, and the detection accuracy and reliability of the inductive switch are improved.

Description

Technical Field

[0001] This application relates to the field of inductive switch technology, and in particular to an inductive switch with a high detection range. Background Technology

[0002] A proximity switch is a device that uses specific sensing technology to automatically control the opening and closing of a circuit. In real life, infrared proximity switches are often used.

[0003] Infrared sensor switches operate using infrared radiation emitted by the human body. When someone enters their detection range, the sensor detects a change in the infrared spectrum emitted by the person, automatically turning on the load. After the person leaves, the switch turns off after a delay. These switches are commonly used in hallways, restrooms, and other places where lights need to turn on when someone is present and off when they leave.

[0004] However, in actual use, when the ambient temperature is close to the human body temperature, the detection and sensitivity decrease significantly, and the infrared sensor switch may sometimes malfunction for a short time. At the same time, the detection range of the infrared sensor switch is only localized within the installation location of the infrared sensor, which is limited and cannot detect all directions of the sensor switch, thus reducing the accuracy of the sensor switch detection. Utility Model Content

[0005] To increase the detection range of an inductive switch, an inductive switch with a high detection range is provided.

[0006] The above-mentioned objective of this application is achieved through the following technical solution:

[0007] A high-detection-range inductive switch includes a base, on which a circuit board is mounted. An infrared sensor is mounted on the circuit board and electrically connected to the circuit board. At least three ultrasonic detectors are also mounted on the circuit board, distributed around the infrared sensor. All ultrasonic detectors are electrically connected to the circuit board, and the angle between the detection direction of the ultrasonic detectors and the detection direction of the infrared sensor is between 0° and 90°.

[0008] By adopting the above technical solution, the detection range of the inductive switch is very limited when using a single infrared sensor. On this basis, an ultrasonic detector and an infrared sensor are integrated onto the same circuit board. The ultrasonic detector detects the presence or movement of a human body by emitting and receiving ultrasonic signals. It can accurately calculate the distance between the human body and the sensor, thereby achieving high-precision detection. At the same time, the angle between the detection direction of the ultrasonic detector and the detection direction of the infrared sensor is between 0° and 90°, ensuring that the target object can be detected in a timely and accurate manner regardless of which direction it approaches. This increases the detection range of the inductive switch and improves the accuracy and reliability of the inductive switch detection.

[0009] Optionally, four ultrasonic detectors are preferred, and the detection directions of the four ultrasonic detectors are all distributed away from the detection direction of the infrared sensor.

[0010] By adopting the above technical solution, the configuration of four ultrasonic detectors provides redundancy. Even if one ultrasonic detector fails, the other ultrasonic detectors can still maintain the normal operation of the system. At the same time, the distribution of the detection directions of the four ultrasonic detectors, which are all opposite to the detection direction of the infrared sensor, further increases the detection range of the inductive switch, thereby improving the reliability of the inductive switch detection.

[0011] Optionally, the four ultrasonic detectors are located at the four corners of the circuit board.

[0012] By adopting the above technical solution, the detection data from the four directions can be mutually verified and supplemented, enabling comprehensive monitoring of the surrounding environment and improving the overall detection accuracy.

[0013] Optionally, a protective cover is also included, on which a buckle is fixed on the side facing the base, and a fixing block with a fixing groove is fixed on the base, the buckle being embedded in the fixing groove and engaging with the fixing block.

[0014] By adopting the above technical solution and adding a protective cover, the internal circuit boards and ultrasonic detectors and other sensitive components can be effectively protected from the influence of external environmental factors. At the same time, the design of the cover and the base snapping together makes the installation and removal of the cover more convenient. If it is necessary to replace or repair the circuit board inside the cover, it can be completed with simple operation without complicated disassembly process, thus improving maintenance efficiency.

[0015] Optionally, it also includes a top cover, wherein a limiting block is fixed on the inner side wall of the top cover, and a limiting protrusion is fixed on the outer periphery of the protective cover, and the limiting block and the limiting protrusion are engaged.

[0016] By adopting the above technical solution, the top cover provides an additional physical protection layer for the protective cover and the base, preventing dust, moisture or other environmental factors from damaging the infrared sensor. At the same time, the snap-fit ​​design of the top cover and the protective cover makes the top cover easy to disassemble and reinstall, facilitating daily maintenance and cleaning.

[0017] Optionally, a photosensitive sensor is also mounted on the circuit board, and the photosensitive sensor is electrically connected to the circuit board.

[0018] By adopting the above technical solution and controlling it with a photosensitive sensor, unnecessary power consumption can be effectively reduced, achieving the goal of energy conservation and environmental protection. When the light reaches the threshold set by the photosensitive sensor, even if someone passes by, no response will be triggered, thus saving energy. Users do not need to manually adjust it, and the system can automatically adapt to the needs of different scenarios, improving its applicability.

[0019] Optionally, a limiting member is fixed on the side of the protective cover facing the circuit board, and the limiting member is engaged with the photosensitive sensor.

[0020] By adopting the above technical solution, the limiting component is engaged with the photosensitive sensor, making the photosensitive sensor more stable during operation, reducing the risk of malfunction or damage caused by vibration or impact, and ensuring that the inductive switch can work stably in various environments.

[0021] Optionally, the protective cover has a conical groove recessed towards the circuit board. The outer diameter of the conical groove on the side facing away from the circuit board is larger than the outer diameter on the side facing the circuit board, and the side of the conical groove facing the circuit board is located outside the outer peripheral sidewall of the infrared sensor.

[0022] By adopting the above technical solution, the conical groove improves the sensor's ability to detect weak signals, thereby expanding the effective detection range of the infrared sensor. When a person or object enters this space, the infrared rays emitted by them will be better captured, thus improving the accuracy of detection.

[0023] Optionally, the protective cover has fixing holes around its perimeter for the ultrasonic detector to pass through, and the top cover has detection holes around its perimeter, with a filter screen installed inside the detection holes, the filter screen covering the surface of the ultrasonic detector.

[0024] By adopting the above technical solution, the presence of the filter can prevent external contaminants from adhering to the surface of the ultrasonic detector, ensuring that the sensitivity and accuracy of the probe are not affected, and reducing the possibility of false alarms or missed alarms.

[0025] Optionally, a limiting post is installed on the base, and a limiting hole is opened on the circuit board, wherein the limiting post and the limiting hole are fitted and inserted into each other.

[0026] By adopting the above technical solution, the cooperation between the limiting post and the limiting hole can ensure the precise positioning of the circuit board during the installation process, avoid performance problems caused by installation deviation, and at the same time, installers do not need to spend a lot of time on fine-tuning, thereby improving installation efficiency.

[0027] Optionally, there are two limiting posts and two limiting holes, with the two limiting posts located at two opposite corners of the circuit board.

[0028] By adopting the above technical solution, the diagonal design of the two limiting posts can effectively prevent the circuit board from loosening due to vibration or impact during use, reducing failures and maintenance costs caused by structural loosening.

[0029] In summary, this application has at least the following beneficial effects:

[0030] 1. Integrating the ultrasonic detector and the infrared sensor onto the same circuit board, based on a single infrared sensor, can reduce the risk of the infrared sensor being affected by external environmental factors, and improve the accuracy and reliability of detection.

[0031] 2. Four ultrasonic detectors are located at the four corners of the circuit board. The angle between the ultrasonic detectors and the circuit board in the direction perpendicular to the circuit board is between 0° and 90°, which ensures that the target object can be detected in a timely and accurate manner no matter which direction it approaches, thus increasing the detection range of the inductive switch. Attached image description:

[0032] Figure 1 An explosion diagram of an inductive switch with a high detection range;

[0033] Figure 2 A schematic diagram showing the installation of the circuit board and the base;

[0034] Figure 3 for Figure 2 A schematic diagram of the structure for the installation of the protective cover and the base;

[0035] Figure 4 A schematic diagram of an explosion between the protective shield and the circuit board;

[0036] Figure 5 A schematic diagram of the installation of the top cover and protective cover;

[0037] Figure 6 for Figure 2 An explosion diagram.

[0038] Reference numerals in the attached diagram: 1. Base; 11. Fixing block; 111. Fixing groove; 12. Limiting post; 2. Circuit board; 21. Limiting hole; 3. Infrared sensor; 4. Ultrasonic detector; 5. Photosensitive sensor; 6. Protective cover; 61. Buckle; 62. Limiting component; 63. Fixing hole; 64. Conical groove; 65. Lens; 66. Fixing component; 67. Limiting protrusion; 7. Top cover; 71. Limiting block; 72. Detection hole; 73. Filter. Detailed implementation method:

[0039] The following section provides a more detailed description, in conjunction with the accompanying diagrams:

[0040] Example 1:

[0041] As attached Figure 1 and attached Figure 2 As shown, a high-detection-range inductive switch includes a base 1, a circuit board 2, a protective cover 6, and a top cover 7.

[0042] Circuit board 2 is located inside base 1, and the side of circuit board 2 facing base 1 is fixedly connected to base 1. An infrared sensor 3 is installed on the side of circuit board 2 facing away from base 1. The infrared sensor 3 is located in the axial direction of base 1, and the infrared sensor 3 is electrically connected to circuit board 2.

[0043] Four ultrasonic detectors 4 are installed on the circuit board 2. The four ultrasonic detectors 4 are located at the four corners of the circuit board 2, and the detection directions of the four ultrasonic detectors 4 are all opposite to the detection direction of the infrared sensor 3. The four ultrasonic detectors 4 are all electrically connected to the circuit board 2.

[0044] Here, the ultrasonic detectors 4 are set into two groups, which are parallel to each other. The angle between the detection direction of the two ultrasonic detectors 4 in the same group and the detection direction of the infrared sensor 3 is between 0° and 90°, preferably 45°. This ensures that the target object can be detected in a timely and accurate manner no matter which direction it approaches, thus increasing the detection range of the inductive switch.

[0045] A photosensitive sensor 5 is also installed on the circuit board 2. The end of the photosensitive sensor 5 facing the circuit board 2 is fixedly connected to the circuit board 2 and electrically connected to the circuit board 2. By controlling the photosensitive sensor 5, unnecessary power consumption can be effectively reduced, so as to achieve the purpose of energy saving and environmental protection.

[0046] There are two fixing blocks 11 fixed on the inner side wall of the base 1. The two fixing blocks 11 are located on opposite sides, and two through fixing slots 111 are opened on each of the two fixing blocks 11.

[0047] As attached Figure 1 and attached Figure 4 As shown, the protective cover 6 has a buckle 61 and a limiting member 62 installed on the side facing the circuit board 2. There are two buckles 61, which are respectively embedded in two fixing slots 111 and engaged with two fixing blocks 11. The design of the protective cover 6 engaging with the base 1 makes the installation and disassembly of the protective cover 6 more convenient.

[0048] The limiting component 62 is engaged with the photosensitive sensor 5, which reduces the risk of the photosensitive sensor 5 malfunctioning due to vibration or impact, and ensures that the inductive switch can work stably in various environments.

[0049] As attached Figure 3 and attached Figure 4As shown, the protective cover 6 has fixing holes 63 around its perimeter for the ultrasonic detector 4 to pass through. The protective cover 6 has a conical groove 64 recessed towards the circuit board 2 in the axial direction. The outer diameter of the conical groove 64 on the side facing away from the circuit board 2 is larger than the outer diameter on the side facing the circuit board 2. The side of the conical groove 64 facing the circuit board 2 is located outside the outer sidewall of the infrared sensor 3, thus expanding the effective detection range of the infrared sensor 3.

[0050] The protective cover 6 is also equipped with a lens 65 and a fixing member 66. The shape of the lens 65 is the same as that of the protective cover 6. The lens 65 is located on the side of the conical groove 64 facing away from the circuit board 2. One end of the fixing member 66 is fixedly connected to the protective cover 6, and the other end extends in the direction of the conical groove 64. There are multiple fixing members 66, and the multiple fixing members 66 are engaged with the outer edge of the lens 65. The lens 65 covers the surface of the infrared sensor 3. The lens 65 can focus the infrared light emitted by the infrared sensor 3, so that it can spread a longer distance, which significantly improves the detection range of the inductive switch.

[0051] Two limiting protrusions 67 are fixed on the outer periphery of the protective cover 6, and the two limiting protrusions 67 are relatively parallel.

[0052] As attached Figure 5 As shown, the upper cover 7 is located on the side of the protective cover 6 facing away from the base 1. A limiting block 71 is fixed on the inner wall of the upper cover 7 facing the protective cover 6. The limiting block 71 is engaged with the limiting protrusion 67. The snap-fit ​​design of the upper cover 7 and the protective cover 6 makes the upper cover 7 easy to disassemble and reinstall, which is convenient for daily maintenance and cleaning.

[0053] The top cover 7 has four detection holes 72 around its perimeter. The four detection holes 72 are aligned with the four fixing holes 63 respectively. Four filters 73 are installed in the four detection holes 72 respectively, and the filters 73 cover the surface of the ultrasonic detector 4 to prevent external contaminants from adhering to the surface of the ultrasonic detector 4, so as to ensure that the sensitivity and accuracy of the ultrasonic detector 4 are not affected.

[0054] Example 2:

[0055] As attached Figure 6 As shown, this second embodiment is an improvement on the first embodiment, and the other structures are the same as those in the first embodiment, so they will not be described in detail here.

[0056] Two limiting posts 12 are installed on the base 1. The two limiting posts 12 are located at two opposite corners of the circuit board 2. Two limiting holes 21 are opened at the two opposite corners of the circuit board 2, and the two limiting posts 12 are respectively engaged with the two limiting holes 21. The cooperation between the two limiting posts 12 and the two limiting holes 21 can ensure the precise positioning of the circuit board 2 during the installation process and avoid performance problems caused by installation deviation. At the same time, the diagonal design of the two limiting posts 12 can effectively prevent the circuit board 2 from loosening due to vibration or impact during use.

[0057] In summary: Four ultrasonic detectors 4 and infrared sensors 3 are integrated on the same circuit board 2. The four ultrasonic detectors 4 and infrared sensors 3 detect simultaneously, which increases the detection range of the inductive switch. At the same time, the angle between the detection direction of the ultrasonic detectors 4 and the detection direction of the infrared sensors 3 is 45°, which ensures that the target object can be detected in a timely and accurate manner no matter which direction it approaches, further increasing the detection range of the inductive switch.

[0058] This specific embodiment is merely an explanation of this application and is not intended to limit it. After reading this specification, those skilled in the art can make modifications to this embodiment without contributing any inventive step, but such modifications are protected by patent law as long as they fall within the scope of protection claimed in this application.

Claims

1. A high-detecting-range induction switch, comprising a base (1), a circuit board (2) mounted on the base (1), an infrared sensor (3) mounted on the circuit board (2), and the infrared sensor (3) being electrically connected with the circuit board (2), characterized in that, The circuit board (2) is further provided with at least three ultrasonic detectors (4), the plurality of ultrasonic detectors (4) are distributed around the infrared sensor (3), the plurality of ultrasonic detectors (4) are electrically connected with the circuit board (2), and the included angle between the detection direction of the ultrasonic detector (4) and the detection direction of the infrared sensor (3) is between 0° and 90°.

2. The inductive switch with high detection range according to claim 1, characterized in that, The ultrasonic detector (4) is four, and the detection direction of the four ultrasonic detectors (4) is distributed back to the infrared sensor (3) detection direction.

3. The inductive switch of claim 2, wherein the magnetic field is generated by a magnet having a diameter of 1.5 inches or less. Four ultrasonic detectors (4) are respectively located at the four corners of the circuit board (2).

4. The inductive switch of claim 1, wherein the magnetic field is generated by a magnet having a magnetic field strength of at least 100 gauss. Further comprising a shroud (6), the shroud (6) is fixed with a buckle (61) on one side of the base (1), the base (1) is fixed with a fixed block (11) with a fixed groove (111), the buckle (61) is embedded in the fixed groove (111), and is clamped with the fixed block (11).

5. A high-detecting-range inductive switch according to claim 4, characterized in that, Further comprising an upper cover (7), the inner side wall of the upper cover (7) is fixed with a limiting block (71), the outer periphery of the shroud (6) is fixed with a limiting protrusion (67), and the limiting block (71) is clamped with the limiting protrusion (67).

6. The inductive switch of claim 4, wherein the magnetic field is generated by a magnet having a diameter of 1.5 inches and a thickness of 0.5 inches. The circuit board (2) is further provided with a photosensitive sensor (5), and the photosensitive sensor (5) is electrically connected with the circuit board (2).

7. The inductive switch of claim 6, wherein the magnet is a rare earth magnet. The shroud (6) is fixed with a limiting piece (62) on one side of the circuit board (2), and the limiting piece (62) is clamped with the photosensitive sensor (5).

8. The inductive switch of claim 4, wherein the magnetic field is generated by a magnet having a diameter of 1.5 inches and a thickness of 0.5 inches. The shroud (6) is provided with a tapered groove (64) recessed towards the circuit board (2), the outer periphery diameter of the side of the tapered groove (64) away from the circuit board (2) is greater than that of the side towards the circuit board (2), and the side of the tapered groove (64) towards the circuit board (2) is located outside the outer periphery side wall of the infrared sensor (3).

9. The inductive switch of claim 1, wherein the magnetic field has a range of about 0.5 to 2 inches. The base (1) is provided with a limiting column (12), and the circuit board (2) is provided with a limiting hole (21), the limiting column (12) is inserted into the limiting hole (21).

10. The inductive switch of claim 9, wherein the magnetic field is generated by a magnet having a diameter of 1.5 inches and a thickness of 0.5 inches. The number of the limiting column (12) and the limiting hole (21) is two, and the two limiting columns (12) are respectively located at two opposite corners of the circuit board (2).

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