Touch-free inductive switch structure
By combining infrared and microwave sensing modules for dual detection, the problem of limited sensing range and susceptibility to false triggering in existing technologies has been solved. This achieves accurate short-range detection and resistance to smoke interference, thus improving the user experience of the sensor switch.
Patent Information
- Application Number
- CN202423205348.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-25
- Publication Date
- 2026-01-09
- Estimated Expiration
- 2034-12-25
AI Technical Summary
Existing infrared and microwave sensing technologies each have their own problems, such as limited sensing range, susceptibility to interference, and susceptibility to false alarms, making it difficult to achieve accurate, long-distance, and short-distance object detection simultaneously.
By combining infrared and microwave sensing modules, and using the dual detection of microwave radar and infrared sensing, the control module integrates and judges the information to achieve simultaneous sensing and issuance of action commands.
It achieves accurate detection at short distances, resists smoke interference, reduces false triggering caused by high reflectivity and metal surfaces, and improves the user experience of the sensor switch.
Smart Images
Figure CN223786041U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the sensing device of automatic equipment, and in particular to a touchless sensing switch structure that integrates infrared sensing and microwave sensing. Background Technology
[0002] Automated equipment is commonly used in modern homes and public buildings. Devices such as automatic doors, automatic lighting, automatic notification systems, automatic smoke extraction systems, and automated machinery often utilize sensors to detect changes in the surrounding environment and implement corresponding automatic controls. Sensing technology plays a crucial role in providing convenience and safety. Currently, infrared sensing and microwave sensing are the two mainstream sensing methods, each with its own advantages and limitations.
[0003] Infrared sensing technology utilizes the emission and reflection of infrared light to detect the presence or movement of targets, making it suitable for detecting the position of objects and whether they have entered the sensing area. The advantages of infrared detection include relatively accurate detection distance; any object that reflects infrared light can be detected, and it can achieve short-range detection of 0.5–15 cm. However, the problems with infrared detection include a relatively small sensing range and limited sensing distance, making it difficult to handle distant or high-speed moving targets; and the sensing effect depends on the surface characteristics of the target object and its ability to reflect infrared light, making it susceptible to interference from dust, fog, or other obstacles.
[0004] On the other hand, microwave sensing technology relies on the Doppler effect, detecting the motion of objects by emitting microwaves and receiving changes in the reflected waves, making it suitable for detecting moving targets. The advantage of microwave detection is its effectiveness against the human body; objects outside the human body are unlikely to trigger microwaves, and smoke will not activate it. However, the disadvantages of microwave detection are its sensitivity to metal, which can easily cause false alarms if metal is nearby, and its long sensing distance makes it unsuitable for short-range detection. Utility Model Content
[0005] The main purpose of this invention is to provide a touchless inductive switch structure that has the advantages of both infrared detection and microwave detection, effectively improving the problem of malfunctions that are easily encountered when relying on a single detection method in the past.
[0006] To achieve the above objectives, this utility model discloses a touchless inductive switch structure, comprising: a body having an internal accommodating space; a microwave sensing module disposed within the accommodating space of the body, for controlling the emission of a microwave radar signal toward a first sensing range, and generating a first sensing signal upon receiving a reflected wave signal corresponding to the microwave radar signal; and an infrared sensing module disposed within the accommodating space of the body, for controlling the emission of an infrared signal toward a second sensing range, and generating a second sensing signal upon receiving a reflected light signal corresponding to the infrared signal. The system includes a signal; and a control module, communicatively or electrically connected to the microwave sensing module and the infrared sensing module, having a control unit and a judgment unit; the control unit is used to control whether the microwave sensing module and the infrared sensing module perform sensing; the judgment unit is used to receive and analyze the first sensing signal generated by the microwave sensing module and / or the second sensing signal generated by the infrared sensing module, and when simultaneously receiving the first sensing signal and the second sensing signal, issues an action command, which is transmitted to an automatic device through a transmission unit to control the automatic device to perform the corresponding action.
[0007] In one embodiment, the first sensing range at least partially overlaps with the second sensing range, and the first sensing range is larger than the second sensing range.
[0008] In one embodiment, the microwave sensing module includes a microwave transmitting unit and a microwave receiving unit; the microwave transmitting unit is used to transmit a microwave radar signal of a predetermined frequency toward the first sensing range; the microwave receiving unit is used to receive the reflected wave signal corresponding to the microwave radar signal, thereby generating the first sensing signal.
[0009] In one embodiment, the infrared sensing module has an infrared emitting unit and an infrared receiving unit; the infrared emitting unit is used to emit the infrared signal; the infrared receiving unit is communicatively or electrically connected to the judgment unit to receive the reflected light signal corresponding to the infrared signal, thereby generating the second sensing signal and transmitting it to the judgment unit.
[0010] In one embodiment, the infrared sensing module further includes a time-of-flight ranging unit, which is communicatively or electrically connected to the infrared emitting unit and the infrared receiving unit. The unit generates a time-of-flight ranging signal based on the time difference between the infrared signal emitted by the infrared emitting unit and the reflected light signal received by the infrared receiving unit, and transmits the signal to the judgment unit through a time-of-flight ranging algorithm.
[0011] In one embodiment, a circuit board is further included, disposed in the accommodating space of the body, for mounting the microwave sensing module, the infrared sensing module and the control module thereon.
[0012] In one embodiment, the control module further includes a power supply unit electrically connected to the microwave sensing module and the infrared sensing module to provide the power required for the operation of the microwave sensing module and the infrared sensing module.
[0013] The following are preferred embodiments based on the purpose and effects of this utility model, and are described in detail with reference to the drawings. Attached Figure Description
[0014] Figure 1 This is a perspective view of a preferred embodiment of the present invention.
[0015] Figure 2 This is an exploded view of a preferred embodiment of the present invention.
[0016] Figure 3 This is a block diagram of a preferred embodiment of the present invention.
[0017] Figure 4 This is a flowchart of a preferred embodiment of the present invention.
[0018] Figure Labels
[0019] 1. Touchless induction switch structure
[0020] 2. Automated equipment
[0021] 10 body
[0022] 11. Base
[0023] 12. Outer shell
[0024] 13. Top Cover
[0025] 14. Storage space
[0026] 20 circuit boards
[0027] 30 Microwave Induction Module
[0028] 31 Microwave Transmitting Unit
[0029] 32 Microwave Receiving Unit
[0030] 40 Infrared sensing module
[0031] 41 Infrared emitting unit
[0032] 42 Infrared receiving unit
[0033] 43 Time-of-Flight Ranging Unit
[0034] 50 Control Modules
[0035] 51 Control Unit
[0036] 52 Judgment Unit
[0037] 53 Transmission Unit
[0038] 54 Power Supply Units Detailed Implementation
[0039] The following description, with reference to the accompanying drawings, represents a preferred embodiment of this utility model. It should be understood that these drawings and descriptions are for illustrative purposes only and are not intended to limit the scope of this utility model. Furthermore, the terms "upper" and "lower," "left" and "right," "front" and "rear," "first" and "second," etc., used in the specification are for clearly describing the relative positions of components or mechanisms and are not intended as limiting terms.
[0040] Please see Figures 1 to 3 As shown, a preferred embodiment of the present invention provides a touchless sensor switch structure 1, which is installed near an automatic device 2 to automatically detect whether someone is approaching the automatic device 2 and control the automatic device 2 to perform corresponding actions. The automatic device 2 includes, but is not limited to, automatic doors, emergency devices, notification devices, smoke extraction devices, fire-fighting devices, mechanical devices, etc. The touchless sensor switch structure 1 mainly includes: a body 10, a circuit board 20, a microwave sensing module 30, an infrared sensing module 40, and a control module 50. Wherein:
[0041] The main body 10 has a base 11, a housing 12, and a top cover 13. The base 11 is generally disc-shaped. The housing 12 is a hollow annular member that is fitted onto the base 11 and extends along the axial direction of the base 11. The top cover 13 covers the housing 12 on the axial side opposite to the base 11, wherein the base 11, the housing 12, and the top cover 13 together enclose an accommodating space 14.
[0042] The circuit board 20 is disposed in the accommodating space 14 of the main body 10, and one side is fixed to the base 11. The circuit board 20 is used for mounting the microwave sensing module 30, the infrared sensing module 40 and the control module 50 thereon.
[0043] The microwave sensing module 30 is disposed within the accommodating space 14 of the main body 10 and mounted on the circuit board 20 for detecting objects via microwave sensing. Specifically, the microwave sensing module 30 has a microwave transmitting unit 31 and a microwave receiving unit 32. The microwave transmitting unit 31 transmits a microwave radar signal of a certain frequency towards a first sensing range. When any target object enters the electromagnetic field of the first sensing range, the microwave radar signal reflects back upon contact with the target object within the first sensing range. Therefore, the microwave receiving unit 32 receives a reflected wave signal corresponding to the microwave radar signal, thereby generating a first sensing signal. The generation of the first sensing signal indicates that the microwave sensing module 30 has determined that there is an object within the first sensing range, and may also be a false alarm caused by the microwave radar signal reflecting off a metal surface.
[0044] The infrared sensing module 40 is disposed within the accommodating space 14 of the main body 10 and mounted on the circuit board 20, for detecting objects by infrared sensing. Specifically, the infrared sensing module 40 has an infrared emitting unit 41 and an infrared receiving unit 42. The infrared emitting unit 41 emits an infrared signal of a certain frequency toward a second sensing range that overlaps with at least a portion of the first sensing range. When any target object enters the second sensing range, the infrared receiving unit 42 receives the reflected light signal from the target object within the second sensing range, thereby generating a second sensing signal. This second sensing signal indicates that the infrared sensing module 40 determines that an object is present within the second sensing range. The second sensing range is smaller than the first sensing range.
[0045] In this embodiment, the infrared sensing module 40 further includes a time-of-flight ranging unit 43, which is communicatively or electrically connected to the infrared emitting unit 41 and the infrared receiving unit 42. This unit calculates the position and direction of movement of the target object based on the time difference between the time the infrared light emitted by the infrared emitting unit 41 and the time the reflected light received by the infrared receiving unit 42, thereby generating a time-of-flight ranging signal and further improving the accuracy of infrared sensing. In another embodiment, the infrared sensing module may also function without the time-of-flight ranging unit, relying solely on the infrared emitting unit and the infrared receiving unit for sensing.
[0046] The control module 50 is located within the accommodating space 14 of the main body 10 and mounted on the circuit board 20. Specifically, the control module 50 includes a control unit 51, a judgment unit 52, a transmission unit 53, and a power supply unit 54. The control unit 51 is communicatively or electrically connected to the microwave sensing module 30 and the infrared sensing module 40 to control whether the microwave sensing module 30 and the infrared sensing module 40 perform sensing. The judgment unit 52 is communicatively or electrically connected to the microwave sensing module 30 and the infrared sensing module 40 to receive the first sensing signal generated by the microwave sensing module 30, the second sensing signal generated by the infrared sensing module 40, and / or the time-of-flight ranging signal. It can automatically analyze and determine whether the target object is a human based on the first sensing signal, the second sensing signal, and / or the time-of-flight ranging signal. If the first sensing signal and the second sensing signal are received, the judgment unit determines that the target object is a human and issues an action command. The transmission unit 53 is communicatively or electrically connected to the judgment unit 52, and is used to transmit the action command issued by the judgment unit 52 to the automatic device 2 via wired or wireless transmission to control the automatic device 2 to perform the corresponding action. The power supply unit 54 is electrically connected to the microwave sensing module 30, the infrared sensing module 40, the control unit 51, and the judgment unit 52, and is used to provide the power required for the operation of the microwave sensing module 30, the infrared sensing module 40, the control unit 51, the judgment unit 52, and the transmission unit 53.
[0047] Based on the above structural configuration, the actual operational application of the touchless inductive switch structure 1 provided by this utility model is as follows:
[0048] Please see Figure 4 As shown, since the sensing range of microwave sensing is relatively large, the control unit 51 of the control module 50 first controls the microwave sensing module 30 to perform the first sensing, causing the microwave transmitting unit 31 of the microwave sensing module 30 to emit a microwave radar signal of a certain frequency towards the first sensing range. The microwave receiving unit 32 attempts to receive the reflected wave signal from the microwave radar signal when it comes into contact with any target object in the first sensing range, thereby generating the first sensing signal and transmitting it to the judgment unit 52. If the judgment unit 52 receives the first sensing signal, it means that the microwave sensing module 30 determines that there is an object in the first sensing range; if the judgment unit 52 does not receive the first sensing signal, it means that there is no object in the first sensing range or the object is too close.
[0049] When the judgment unit 52 receives the first sensing signal, the control unit 51 further controls the infrared sensing module 40 to start a second sensing, causing the infrared emitting unit 41 to emit an infrared signal of a certain frequency towards the second sensing range. The infrared receiving unit 42 attempts to receive the reflected light signal from any target object within the second sensing range, thereby generating the second sensing signal and transmitting it to the judgment unit 52. If the judgment unit 52 receives the second sensing signal, it means that the infrared sensing module 40 determines that there is a human body within the second sensing range; if the judgment unit 52 does not receive the second sensing signal, it means that the object previously detected by the microwave sensing module 30 is not a human body (possibly a misjudgment caused by reflection from a metal surface), and the control unit 51 controls the microwave sensing module to re-sensing.
[0050] Since the first sensing signal is generated by microwave sensing, the possibility of the target object being smoke or a reflective device can be ruled out. The second sensing signal is generated by infrared sensing, indicating that the distance between the object and the automatic door is short, and the possibility of the target object being a metal surface can be ruled out. Therefore, when the judgment unit 52 receives the first and second sensing signals, it can determine that the object in front of the automatic device 2 is a human. At this time, the processing unit issues the action command, which is transmitted to the automatic device 2 through the transmission unit 53 to control the automatic device 2 to perform the corresponding action. For example, if the automatic device 2 is an automatic door, the action command is an opening command, causing the automatic door to open automatically upon receiving the opening command and then delay closing for a set time.
[0051] In summary, the touchless inductive switch structure provided by this invention, by simultaneously performing microwave and infrared sensing, combines the advantages of both while overcoming the drawbacks of using them individually. Compared to existing infrared inductive switches, which are prone to malfunction due to highly reflective devices (such as reflective vests or clothing) or smoke, and existing microwave inductive switches, which are prone to malfunction due to metal and have a long sensing distance, this invention effectively achieves (i) short-range detection; (ii) resistance to smoke interference; and (iii) a significant reduction in distance errors caused by high reflectivity, thus effectively improving the user experience of the inductive switch.
[0052] The above are preferred embodiments and design drawings of this utility model. The preferred embodiments and design drawings are merely illustrative examples and are not intended to limit the scope of protection of this utility model. Any implementation using equivalent technical means or within the scope of protection covered by the above "claims" does not depart from the scope of protection of this utility model.
Claims
1. A touchless inductive switch structure, characterized in that, Includes: A single entity, with an internal accommodating space; A microwave sensing module is disposed in the accommodating space of the main body, and is used to transmit a microwave radar signal in a controlled manner toward a first sensing range, and generate a first sensing signal when a reflected wave signal corresponding to the microwave radar signal is received. An infrared sensing module, disposed within the accommodating space of the main body, is configured to be controlled to emit an infrared signal toward a second sensing range, and to generate a second sensing signal upon receiving a reflected light signal corresponding to the infrared signal; and A control module, communicatively or electrically connected to the microwave sensing module and the infrared sensing module, includes a control unit and a judgment unit. The control unit controls whether the microwave sensing module and the infrared sensing module perform sensing. The judgment unit receives and analyzes the first sensing signal generated by the microwave sensing module and / or the second sensing signal generated by the infrared sensing module, and issues an action command when simultaneously receiving the first sensing signal and the second sensing signal, which is transmitted to an automatic device through a transmission unit to control the automatic device to perform the corresponding action.
2. The touchless inductive switch structure according to claim 1, characterized in that, The first sensing range overlaps at least partially with the second sensing range, and the first sensing range is larger than the second sensing range.
3. The touchless inductive switch structure according to claim 1, characterized in that, The microwave sensing module has a microwave transmitting unit and a microwave receiving unit; the microwave transmitting unit is used to transmit a microwave radar signal of a predetermined frequency toward the first sensing range; the microwave receiving unit is used to receive the reflected wave signal corresponding to the microwave radar signal, thereby generating the first sensing signal.
4. The touchless inductive switch structure according to claim 1, characterized in that, The infrared sensing module has an infrared emitting unit and an infrared receiving unit; the infrared emitting unit is used to emit the infrared signal; the infrared receiving unit is communicatively or electrically connected to the judgment unit to receive the reflected light signal corresponding to the infrared signal, thereby generating the second sensing signal and transmitting it to the judgment unit.
5. The touchless inductive switch structure according to claim 4, characterized in that, The infrared sensing module also has a time-of-flight ranging unit, which is communicatively or electrically connected to the infrared emitting unit and the infrared receiving unit. It is used to generate a time-of-flight ranging signal based on the time difference between the infrared signal emitted by the infrared emitting unit and the reflected light signal received by the infrared receiving unit, and transmit it to the judgment unit.
6. The touchless inductive switch structure according to claim 1, characterized in that, It also includes a circuit board disposed in the accommodating space of the body for mounting the microwave sensing module, the infrared sensing module and the control module thereon.
7. The touchless inductive switch structure according to claim 1, characterized in that, The control module also includes a power supply unit electrically connected to the microwave sensing module and the infrared sensing module to provide the power required for the operation of the microwave sensing module and the infrared sensing module.