Hand waving switch control circuit

Abstract

The utility model relates to a hand waving switch control circuit, which comprises a radar sensor U1, a single chip microcomputer U2, a relay and a power supply module which are electrically connected, and is characterized in that the radar sensor U1 is used for identifying a hand waving signal within a certain distance range and outputting a corresponding level; the single chip microcomputer U2 is used for judging the level information output by the radar sensor U1 and driving the relay to be switched on or switched off; the relay is used for realizing on-off control on the load; and the power supply module is used for supplying power to the relay, the radar sensor U1 and the single chip microcomputer U2. The radar technology is used for sensing hand waving, the influence of light and sensing media is avoided, and the sensing distance and the position angle can be adjusted through software programming.

Description

Technical Field

[0001] The utility model relates to the technical field of switches, in particular to a waving switch control circuit. Background Art

[0002] The wave switch is a contactless active infrared induction smart switch. Its main feature is to control the switch of the circuit by waving your hand at a certain distance from the switch panel. It is an active infrared induction switch suitable for public health related areas to achieve simple and convenient lighting control in a contactless mode. Infrared induction switches are greatly affected by light, induction media, and position angles in the use scenario, and the user experience is poor. Utility Model Content

[0003] Purpose of the utility model: In order to overcome the defects of the prior art, the utility model provides a waving switch control circuit, which uses radar technology to sense waving, is not affected by light and sensing media, and the sensing distance and position angle can be adjusted through software programming.

[0004] The technical solution of the utility model: a wave switch control circuit, including an electrically connected radar sensor U1, a single-chip computer U2, a relay and a power module,

[0005] Radar sensor U1, which is used to identify hand-waving signals within a certain distance range and output corresponding levels;

[0006] The single chip microcomputer U2 is used to determine the level information output by the radar sensor U1 and drive the relay to open or close;

[0007] Relay, which realizes the switching control of the load;

[0008] The power module is used to supply power to the relay, radar sensor U1 and microcontroller U2.

[0009] By adopting the above technical solution, the new generation of wave switch overcomes the disadvantages of infrared tubes and uses radar technology to sense waving. It is not affected by light and sensing media, and the sensing distance and position angle can be adjusted through software programming, making the switch more intelligent, easier to operate, and with more stable sensing technology.

[0010] The utility model is further configured as follows: it also includes a button S1, the button S1 is electrically connected to the single-chip microcomputer U2, and the button S1 has a first switch mode capable of controlling the relay to be turned on or off.

[0011] With the above further configuration, manual control can also be performed through button S1, which breaks away from the single induction operation mode of traditional wave switches on the market and can achieve manual and induction automatic dual-mode operation, increasing the flexibility of usage scenarios.

[0012] A further configuration of the present invention is that the button S1 also has a second switch mode capable of controlling the radar sensor U1 to be turned on or off.

[0013] With the above further configuration, the radar sensing function can be manually turned on or off by pressing button S1 according to the use needs, which is convenient for users to use in different environments.

[0014] The present invention is further configured as follows: the first switch mode of the button S1 is short press start, and the second switch mode of the button S1 is long press start.

[0015] With the above further arrangement, the short-press and long-press operation modes facilitate operation and mode switching.

[0016] The utility model is further configured as follows: the power module has a fuse F1, a rectifier diode D3, a filter circuit, a buck chip U3 and a power chip U4 which are connected in sequence; the output of the buck chip U3 is connected to a relay; the output of the power chip U4 is connected to a single-chip computer U2 and a radar sensor U1.

[0017] By further adopting the above configuration, the fuse F1 is used to protect the safe operation of the circuit; the rectifier diode D3 is used to perform half-wave rectification; the filter circuit filters out unnecessary frequency components in the signal and retains the necessary frequency components, so that the output voltage after filtering is a stable DC voltage; the chips U3 and U4 are used to supply the required different voltages to the relay, the microcontroller U2 and the radar sensor U1 respectively.

[0018] The utility model is further configured as follows: a thermistor RT1 connected in parallel with the filter circuit is connected between the fuse F1 and the rectifier diode D3.

[0019] With the above further configuration, lightning protection is provided through RT1.

[0020] The utility model is further configured as follows: the filter circuit comprises inductors L1, L3 and capacitors C7, C8, C9 connected in parallel, and the inductors L1, L3 are respectively connected between the two ends of the capacitors C7, C8 connected in parallel.

[0021] The utility model is further configured as follows: the step-down chip U3 outputs a 5V DC voltage, and the power chip U4 outputs a 3.3V DC voltage.

[0022] A further configuration of the utility model is as follows: the radar sensor U1 model is HLK-LD102.

[0023] The present invention is further configured to include indicator lights D1 and / or D2, wherein the indicator lights D1 and D2 are electrically connected to the single chip computer U2.

[0024] With the above further arrangement, working indication can be given by indicator light. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 It is a circuit connection diagram of a specific embodiment of the utility model;

[0026] Figure 2 A circuit diagram of a specific embodiment of the utility model;

[0027] Figure 3 A circuit diagram of a power module of a specific embodiment of the utility model;

[0028] Figure 4 This is a circuit diagram of the single chip microcomputer U2 of a specific embodiment of the utility model;

[0029] Figure 5 This is a circuit diagram of a radar sensor U1 according to a specific embodiment of the utility model;

[0030] Figure 6 A relay circuit diagram of a specific embodiment of the utility model;

[0031] Figure 7 This is an interface circuit diagram of a specific embodiment of the utility model. DETAILED DESCRIPTION

[0032] The technical scheme in this embodiment will be described clearly and completely below in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of them. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0033] like Figure 1-7 As shown, a waving switch control circuit of the utility model includes a radar sensor U1, a single-chip computer U2, a relay and a power supply module which are electrically connected.

[0034] Radar sensor U1, which is used to identify hand-waving signals within a certain distance range and output corresponding electrical levels. The model of the radar sensor U1 is HLK-LD102;

[0035] The single chip microcomputer U2 is used to determine the level information output by the radar sensor U1 and drive the relay to open or close;

[0036] Relay, which realizes the switching control of the load;

[0037] A power module is used to supply power to the relay, radar sensor U1 and single-chip computer U2. The power module has a fuse F1, a rectifier diode D3, a filter circuit, a buck chip U3 and a power chip U4 connected in sequence. The filter circuit has inductors L1, L3 and capacitors C7, C8 and C9 connected in parallel. The inductors L1 and L3 are respectively connected between the two ends of the parallel capacitors C7 and C8. A capacitor C5 and an inductor L2 are also provided between the buck chip U3 and the power chip U4. A thermistor RT1 connected in parallel with the filter circuit is also connected between the fuse F1 and the rectifier diode D3. The output of the buck chip U3 is connected to the relay, and the output of the power chip U4 is connected to the single-chip computer U2 and the radar sensor U1. The buck chip U3 outputs a 5V DC voltage, and the power chip U4 outputs a 3.3V DC voltage.

[0038] It also includes a button S1, which is electrically connected to the single-chip microcomputer U2. The button S1 has a first switch mode that can control the relay to turn on or off; the button S1 also has a second switch mode that can control the radar sensor U1 to turn on or off. The first switch mode of the button S1 is short press start, and the second switch mode of the button S1 is long press start. The single-chip microcomputer U2 can be given a signal by short pressing or long pressing the button, and the single-chip microcomputer can control the switch of the relay and the radar sensor U1. The switching control by short pressing or long pressing the button is an existing design, so it will not be described in detail.

[0039] It also includes indicator lights D1 and / or D2, and the indicator lights D1, D2 are electrically connected to the single-chip computer U2.

[0040] When the power supply is working, 220V~ AC power passes through fuse F1, and then is half-wave rectified by rectifier diode D3, and the filtering circuit makes the output voltage after filtering a stable DC voltage. The 5V DC voltage is output through the step-down chip U3 to power the relay, and then converted into 3.3V DC voltage through the power chip U4 to power the microcontroller U2 and radar sensor U1.

[0041] The new generation of the waving switch of the utility model has manual and automatic dual-mode operation, which is convenient for users to use in different environments.

[0042] In automatic mode, the waving signal is detected by radar sensor U1, and the induction level is output to the single-chip computer U2. U2 determines whether the waving signal is valid and whether it is working in automatic trigger mode through software programming logic and algorithm. If it is valid, the indicator light is on, the relay is turned on, and the load works; after waving again, the indicator light goes out, the relay is disconnected, and the load stops working. It overcomes the disadvantages of infrared tubes and uses radar technology to sense waving, which is not affected by light and sensing media. In addition, the sensing distance and position angle can be adjusted through software programming, making the switch more intelligent, more convenient to operate, and more stable induction technology.

[0043] You can manually operate the panel button S1 by short pressing to turn the load on or off.

[0044] You can manually press and hold the panel button S1 to turn the radar sensing function on or off.

Claims

1. A wave switch control circuit, characterized in that: It includes an electrically connected radar sensor U1, a microcontroller U2, a relay and a power module. Radar sensor U1, which is used to identify the waving signal and output the corresponding level; The single chip microcomputer U2 is used to determine the level information output by the radar sensor U1 and drive the relay to open or close; Relay, which realizes the switching control of the load; The power module is used to supply power to the relay, radar sensor U1 and microcontroller U2.

2. The wave switch control circuit according to claim 1, characterized in that: It also includes a button S1, which is electrically connected to the single-chip microcomputer U2, and has a first switch mode that can control the relay to be turned on or off.

3. The wave switch control circuit according to claim 2, characterized in that: The button S1 also has a second switch mode that can control the radar sensor U1 to be turned on or off.

4. The wave switch control circuit according to claim 3, characterized in that: The first switch mode of the button S1 is short press start, and the second switch mode of the button S1 is long press start.

5. The wave switch control circuit according to any one of claims 1 to 4, characterized in that: The power module has a fuse F1, a rectifier diode D3, a filter circuit, a buck chip U3 and a power chip U4 which are connected in sequence. The output of the buck chip U3 is connected to a relay, and the output of the power chip U4 is connected to a single-chip computer U2 and a radar sensor U1.

6. The wave switch control circuit according to claim 5, characterized in that: A thermistor RT1 connected in parallel with the filter circuit is also connected between the fuse F1 and the rectifier diode D3.

7. The wave switch control circuit according to claim 5, characterized in that: The filter circuit comprises inductors L1 and L3 and capacitors C7, C8 and C9 connected in parallel. The inductors L1 and L3 are connected between two ends of the capacitors C7 and C8 connected in parallel, respectively.

8. The wave switch control circuit according to claim 5, characterized in that: The step-down chip U3 outputs a 5V DC voltage, and the power chip U4 outputs a 3.3V DC voltage.

9. The wave switch control circuit according to any one of claims 1 to 4, characterized in that: The model of the radar sensor U1 is HLK-LD102.

10. The wave switch control circuit according to any one of claims 1 to 4, characterized in that: It also includes LED indicator lights D1 and / or D2, and the indicator lights D1, D2 are electrically connected to the single-chip computer U2.

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