Intelligent switch, adaptive signal control circuit, lighting system and intelligent lighting equipment

Abstract

The utility model discloses an intelligent switch, a self-adaptive signal control circuit, a lighting system and intelligent lighting equipment. The intelligent switch comprises a switch body and a switch control device arranged in the switch body. The switch body comprises a front cover and a rear cover. The switch control device comprises a control signal transmitting circuit, a signal transmitter and a signal receiver. The control signal transmitting circuit comprises a controller and an adjustable constant current circuit. The controller controls the signal transmitter to transmit a first optical signal. The signal receiver receives a reflected signal of the first optical signal and transmits the reflected signal to the controller. And the controller sends an adjustment instruction according to the reflection signal, and adjusts a driving signal of the adjustable constant current circuit to a working driving signal. The signal transmitter transmits a second optical signal according to the working driving signal, the signal receiver receives an induction feedback signal of the second optical signal, and the controller transmits a control instruction signal to the electronic equipment according to the received induction feedback signal. According to the invention, the transmitting power of the signal transmitter can be adaptively adjusted.

Description

Technical Field

[0001] This application relates to the field of intelligent control technology, specifically to an intelligent switch. This application also relates to an adaptive signal control circuit, a lighting system, and an intelligent lighting device. Background Technology

[0002] Infrared gesture switches, due to their non-contact operation, high sensitivity, and low power consumption, have broad application prospects in smart homes, medical equipment, and industrial automation. For example, in smart homes, users can control the on / off and adjustment of devices such as lights, curtains, and air conditioners with simple gestures, achieving a more convenient and hygienic operating experience. In the medical equipment field, infrared gesture switches can be used for equipment control in operating rooms, reducing the risk of cross-infection.

[0003] With the continuous development of IoT technology, infrared gesture sensing switches have also been widely used.

[0004] However, while infrared gesture sensing switches offer advantages such as non-contact operation, high sensitivity, and energy saving, they also have some drawbacks that need to be overcome, such as interference from the switch itself with infrared light and interference from ambient light. Utility Model Content

[0005] This application provides a smart switch to address the problems of existing infrared gesture switches being unusable in outdoor waterproof environments and experiencing reduced sensitivity in the presence of strong light sources. This application also provides an adaptive signal control circuit, a lighting system, and a smart lighting device.

[0006] This application provides an intelligent switch, including: a switch body and a switch control device disposed within the switch body; the switch body includes: a switch rear cover and a switch front cover, which are mated and connected; the switch control device includes: a control signal transmitting circuit, a signal transmitter, and a signal receiver; the control signal transmitting circuit includes: a controller and an adjustable constant current circuit; a first port of the controller is connected to the signal receiver; a second port of the controller is connected to the output terminal of the signal transmitter, and the adjustable constant current circuit is connected between the second port and the output terminal of the signal transmitter; a third port of the controller is connected to the input terminal of the signal transmitter; the controller is connected via the third port... A drive signal is transmitted to the signal transmitter to cause the signal transmitter to emit a light signal in the direction of the switch front cover. When the smart switch is in a non-operating state, the signal receiver receives the reflected signal of the first light signal reflected by the switch front cover and transmits the reflected signal to the controller. The controller sends an adjustment command to the adjustable constant current circuit according to the reflected signal, and the adjustable constant current circuit adjusts the drive signal to the working drive signal. When the smart switch is in an operating state, the signal transmitter emits a second light signal according to the working drive signal, and the signal receiver receives the inductive feedback signal of the second light signal reflected by the obstacle. The controller transmits a control command signal to the electronic device according to the received inductive feedback signal.

[0007] Optionally, it also includes a filter circuit, which is connected between the second port of the controller and the adjustable constant current circuit.

[0008] Optionally, the filtering circuit includes: a first-order filtering circuit or a second-order filtering circuit; the first-order filtering circuit includes: a first resistor and a first capacitor; the input terminal of the first resistor is connected to the second port of the controller, the input terminal of the first capacitor is connected to the output terminal of the first resistor, and the output terminal of the first capacitor is grounded; the second-order filtering circuit includes: two cascaded first-order filtering circuits.

[0009] Optionally, the controller transmits the PWM signal to the filter circuit through the second port, and the filter circuit converts the PWM signal into an analog signal and transmits it to the input of the adjustable constant current circuit.

[0010] Optionally, the adjustable constant current circuit includes: a switching element and a load; the switching element and the load are connected in series and located between the output of the signal transmitter and ground.

[0011] Optionally, the switching element is a transistor, and the load is a third resistor; the collector of the transistor is connected to the signal transmitter, the base of the switching element is connected to the filter circuit, and the emitter of the switching element is connected to the input terminal of the third resistor; the output terminal of the third resistor is grounded.

[0012] Optionally, the controller transmits a drive signal to the signal transmitter via a third port to control the transmission frequency of the optical signal in the form of a modulated carrier wave.

[0013] This application also provides an adaptive signal control circuit, including: a controller, an adjustable constant current circuit, a signal transmitter, and a signal receiver; a first port of the controller is connected to the signal receiver; a second port of the controller is connected to the output terminal of the signal transmitter, and the adjustable constant current circuit is connected between the second port and the output terminal of the signal transmitter; a third port of the controller is connected to the input terminal of the signal transmitter; the controller transmits a drive signal to the signal transmitter through the third port to make the signal transmitter emit an optical signal; when the signal receiver receives the reflected signal of the optical signal reflected by the cover of the signal transmitter, it transmits the reflected signal to the controller; the controller sends an adjustment command to the adjustable constant current circuit according to the reflected signal, and the adjustable constant current circuit adaptively adjusts the drive signal to a working drive signal; the controller transmits the working drive signal to the signal transmitter through the adjustable constant current circuit, the signal transmitter emits a second optical signal according to the working drive signal, the signal receiver receives the induced feedback signal of the second optical signal reflected by an obstacle, and the controller transmits a control command signal to the electronic device according to the received induced feedback signal.

[0014] This application also provides a lighting system, including: an electronic device and a smart switch; the smart switch is a smart switch as described above; the smart switch controls the operating state of the electronic device according to a sensing feedback signal.

[0015] This application also provides a lighting system, including: a housing, and a light source and a control circuit board located within the housing; the control circuit board is provided with an adaptive signal control circuit as described above; the adaptive signal control circuit controls the working state of the light source according to a sensing feedback signal.

[0016] Compared with the prior art, this application has the following advantages:

[0017] This application provides an intelligent switch, which internally includes a switch control device comprising a control signal transmitting circuit, a signal transmitter, and a signal receiver. The control signal transmitting circuit includes a controller and an adjustable constant current circuit. When the intelligent switch is in a non-operating state, the controller sends an adjustment command to the adjustable constant current circuit based on the reflected signal, and the adjustable constant current circuit adjusts the drive signal to an operating drive signal. When the intelligent switch is in an operating state, the signal receiver receives an inductive feedback signal, and the controller transmits a control command signal to the electronic device based on the received inductive feedback signal.

[0018] On the one hand, reflected signals can cause abnormal operating states of electronic devices, preventing the infrared gesture sensor switch from controlling the normal operation of the electronic devices. This application utilizes reflected signals to adaptively adjust the drive signal of the adjustable constant current circuit, enabling the signal transmitter to emit a second light signal according to the working drive signal. The controller then transmits control command signals to the electronic devices based on the feedback signal from the reflection of the second light signal by the obstacle, thereby realizing the control of the normal operation of the electronic devices by the infrared gesture sensor switch and ensuring the effectiveness and stability of the infrared gesture sensor switch.

[0019] On the other hand, strong changes in ambient light can interfere with the signal receiver of the smart switch, leading to a shortened working distance or complete ineffectiveness of the gesture sensor. This application addresses this by using reflected signals to adaptively adjust the drive signal of the adjustable constant current circuit. This allows the signal transmitter to emit a second light signal based on changes in ambient light, and the controller to transmit control commands to the electronic device based on the feedback signal from the reflection of the second light signal by an obstacle. This overcomes the interference of strong ambient light changes on the infrared gesture sensor switch, enabling the infrared gesture sensor switch to control the normal operation of the electronic device and ensuring its effectiveness and stability.

[0020] This application provides an adaptive signal control circuit that adaptively adjusts the drive signal of an adjustable constant current circuit using reflected signals. This enables the signal transmitter to emit a second light signal based on the working drive signal, and the controller to transmit control command signals to the electronic device based on the feedback signal of the second light signal reflected by the obstacle. This achieves gesture sensing control of the electronic device's operating state, ensuring the effectiveness and stability of the smart switch.

[0021] This application provides a lighting system that, by employing the aforementioned smart switch, improves the stability of gesture sensing in controlling the operating state of electronic devices and avoids abnormal operating states of electronic devices caused by interference factors such as ambient light.

[0022] This application provides an intelligent lighting device that, by employing the aforementioned adaptive signal control circuit, improves the stability of gesture sensing in controlling the working state of electronic devices and avoids abnormal working states of electronic devices caused by interference factors such as ambient light. Attached Figure Description

[0023] Figure 1 This is a structural diagram of the first embodiment of an existing infrared sensor switch;

[0024] Figure 2 This is a structural diagram of a second embodiment of an existing infrared sensor switch;

[0025] Figure 3This is a schematic diagram of the structure of an intelligent switch provided in this application;

[0026] Figure 4 This is a circuit diagram of a switch control device in an intelligent switch provided in this application;

[0027] Figure 5 This is a schematic diagram of the structure of a first embodiment of the control signal transmitting circuit in an intelligent switch provided in this application;

[0028] Figure 6 This is a schematic diagram of the structure of a second embodiment of the control signal transmitting circuit in a smart switch provided in this application;

[0029] Figure 7 This is a schematic diagram of the structure of a lighting system provided in this application;

[0030] Figure 8 This is a structural schematic diagram of an intelligent lighting device provided in this application.

[0031] Explanation of Figure Numbers in the Attached Drawings

[0032] 1. Intelligent switch; 11. Switch body; 111. Switch front cover; 112. Switch rear cover; 12. Switch control device; 121. Control signal transmitting circuit; 121. Controller; 121-1. Adjustable constant current circuit; 121-2. Signal transmitter; 122. Signal receiver; 123. Filtering circuit; 124. Reflected signal; 2. Inductive feedback signal; 3. Obstacle; 4. Electronic equipment; 5. Housing; 6. Light source; 7. Control circuit board; 8. Detailed Implementation

[0033] Many specific details are set forth in the following description to provide a full understanding of this application. However, this application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar extensions without departing from the spirit of this application; therefore, this application is not limited to the specific embodiments disclosed below.

[0034] The terminology used in this application is for the purpose of describing particular embodiments only and is not intended to limit the application. The descriptive terms used in this application and the appended claims, such as "a," "first," and "second," are not intended to limit quantity or sequence, but rather to distinguish information of the same type from one another.

[0035] Based on the aforementioned background technology, the intelligent switch provided in this application is a non-contact control device. Its inventive concept stems from the fact that the stability of an infrared gesture sensor switch's operation can be affected by its own structure and / or ambient light. For example: Figure 1As shown, to prevent the switch housing from reflecting infrared light, the infrared emitter of the infrared gesture switch can be placed outside the housing. This exposes the emitter, preventing reflection. However, this method is not suitable for outdoor environments. Exposing the emitter necessitates considerations of waterproofing, safety, and durability, complicating the structure and increasing manufacturing costs. Another approach is to increase the housing's transparency, such as... Figure 2 As shown, a material with good transparency is selected as the shell. However, this method cannot fundamentally solve the reflection problem. Even with a material with good transparency, reflection still occurs. In addition, it will increase the manufacturing cost and will also be affected by factors such as oxidation, which will lead to a decrease in aesthetics.

[0036] Regardless of whether the first or second method is chosen, the reason why the infrared gesture sensor switch may not work properly is due to interference from ambient light. For example, in situations with strong light interference or sunlight, the infrared signal emitted by the infrared transmitter may be interfered with or overwhelmed by other strong light sources or sunlight, causing the infrared gesture sensor switch to fail to work properly even at shorter distances.

[0037] In view of this, this application provides a smart switch, such as Figure 3 As shown, Figure 3 This is a schematic diagram of the structure of a smart switch provided in this application. The smart switch 1 may include: a switch body 11 and a switch control device 12 disposed in the switch body 11.

[0038] The switch body 11 includes a front cover 111 and a rear cover 112, which are mated and connected. The front cover 111 and rear cover 112 protect the switch control device housed within the switch body, preventing external factors from adversely affecting the device and improving the durability and lifespan of the smart switch. For example, if the smart switch can be used outdoors, the front and rear covers protect the control device, providing waterproofing and protecting it from rain and damage.

[0039] like Figure 4 As shown, Figure 4 This is a circuit diagram of a switch control device in an intelligent switch provided in this application. In this embodiment, the switch control device 12 includes: a control signal transmitting circuit 121, a signal transmitter 122, and a signal receiver 123.

[0040] The control signal transmitting circuit 121 includes a controller 121-1 and an adjustable constant current circuit 121-2. The first port of the controller 121-1 is connected to the signal receiver 123. The second port of the controller 121-1 is connected to the output terminal of the signal transmitter 122, and the adjustable constant current circuit 121-2 is connected between the second port of the controller 121-1 and the output terminal of the signal transmitter 122. The third port of the controller 121-1 is connected to the input terminal of the signal transmitter 122.

[0041] The controller 121-1 transmits a drive signal to the signal transmitter 122 via its third port, causing the signal transmitter 122 to emit a light signal toward the front cover of the switch. For example, when the third port of the controller 121-1 transmits a high-level signal to the signal transmitter 122, it indicates that the signal transmitter 122 is emitting a light signal toward the front cover 111 of the switch; when the third port of the controller 121-1 transmits a low-level signal to the signal transmitter 122, it indicates that the signal transmitter 122 is not emitting a light signal.

[0042] Signal receiver 123 is used to receive optical signals. In some embodiments, signal receiver 123 may be an infrared receiver tube, an infrared remote control receiver head, or an infrared sensor, etc. In this embodiment, signal receiver 123 may be a dedicated infrared remote control receiver, used to receive amplitude-modulated infrared signals and correctly identify and reconstruct the received infrared signals. Due to the manufacturing process of signal receiver 123, different signal receiver 123 components may have different sensitivities to receiving optical signals. The sensitivity of signal receiver 123 is a performance indicator of its ability to effectively detect optical signals and convert them into electrical signals. The preset value of signal receiver 123 is the minimum incident light power threshold that enables signal receiver 123 to clearly detect optical signals and output valid electrical signals. When the light power received by signal receiver 123 is lower than the preset value, the current or voltage signal generated by signal receiver 123 is very weak and may be overwhelmed by noise in the circuit, resulting in the inability to correctly identify and process the optical signal. Only when the light power received by signal receiver 123 reaches or exceeds the preset value can signal receiver 123 output a valid electrical signal, which can then be identified by subsequent circuits and perform corresponding actions. When the optical signal power received by signal receiver 123 is less than a preset value, signal receiver 123 outputs a second received signal. When the optical signal power received by signal receiver 123 is equal to or greater than the preset value, signal receiver 123 outputs a first received signal. For example, when the optical signal power received by signal receiver 123 is less than the preset value, it outputs a low-level signal; when the optical signal power received by signal receiver 123 is equal to or greater than the preset value, it outputs a high-level signal. The signal output by signal receiver 123 is transmitted to controller 121-1 through the first port of controller 121-1.

[0043] The preset value of the signal receiver 123 is determined by the specific components of the signal receiver 123 used in the actual application. Due to manufacturing processes, different signal receivers 123 have different sensitivities. The higher the sensitivity of the signal receiver 123, the smaller the threshold of the minimum incident optical power for the signal receiver 123 to output an effective electrical signal, i.e., the smaller the preset value of the signal receiver 123. Conversely, the lower the sensitivity of the signal receiver 123, the larger the threshold of the minimum incident optical power for the signal receiver 123 to output an effective electrical signal, i.e., the larger the preset value of the signal receiver 123.

[0044] Based on the signal sent by the signal receiver 123, the controller 121-1 sends an adjustment command to the adjustable constant current circuit 121-2 through its second port, adjusting the current of the adjustable constant current circuit 121-2 and the current of the signal transmitter 122. For example, the second port of the controller 121-1 can send a pulse width modulation (PWM) signal and adjust the duty cycle of the PWM signal according to the received signal sent by the signal receiver 123, thereby adjusting the voltage at the input of the adjustable constant current circuit 121-2, thus adjusting the current of the adjustable constant current circuit 121-2, and consequently adjusting the current of the signal transmitter 122, i.e., adjusting the transmission power of the signal transmitter 122.

[0045] When the smart switch is in a non-operating state, the controller 121-1 transmits a drive signal to the signal transmitter 122 via the third port, causing the signal transmitter 122 to emit a first optical signal towards the front cover 111 of the switch. The controller 121-1 controls the output of the PWM signal. The pulse width of the PWM signal changes from narrow to wide, and the duty cycle of the PWM signal gradually increases, causing the average voltage at the input terminal of the adjustable constant current circuit 121-2 to gradually increase, and the drive current through the adjustable constant current circuit 121-2 to gradually increase. Because the adjustable constant current circuit 121-2 is connected in series with the signal transmitter 122, the drive current through the adjustable constant current circuit 121-2 gradually increases, and the drive current through the signal transmitter 122 also increases accordingly, that is, the transmission power of the signal transmitter 122 also increases accordingly. When the first optical signal emitted by the signal transmitter 122 reaches the front cover 111 of the switch, part of it is reflected, and part of it passes through the front cover 111 of the switch and continues to extend. The portion of the first optical signal emitted by the signal transmitter 122 that is reflected by the switch front cover 111, known as reflected signal 2, is received by the signal receiver 123. When the power of the optical signal received by the signal receiver 123 is less than a preset value, the signal receiver 123 outputs a second received signal. When the power of the optical signal received by the signal receiver 123 is equal to or greater than the preset value, the signal receiver 123 outputs a first received signal. The signal output by the signal receiver 123 is transmitted to the controller 121-1 via the first port of the controller 121-1.

[0046] As the above analysis shows, the transmission power of the signal transmitter 122 increases with the increase of the duty cycle of the PWM signal, and the optical signal power received by the signal receiver 123 also increases with the increase of the transmission power of the signal transmitter 122. Therefore, the optical signal power received by the signal receiver 123 increases with the increase of the duty cycle of the PWM signal. Since the controller 121-1 controls the pulse width of the PWM signal to change from narrow to wide, the duty cycle of the PWM signal gradually increases, and the optical signal power received by the signal receiver 123 also gradually increases. When the optical signal power received by the signal receiver 123 is less than a preset value, the signal receiver 123 outputs a second received signal. As the duty cycle of the PWM signal gradually increases, the transmission power of the signal transmitter 122 gradually increases, and the optical signal power received by the signal receiver 123 also gradually increases. When the optical signal power received by the signal receiver 123 is equal to or greater than a preset value, the signal receiver 123 outputs a first received signal.

[0047] After receiving the first received signal from the signal receiver 123, the controller 121-1 stops increasing the duty cycle of the PWM signal and then decreases the duty cycle of the PWM signal, causing the drive current through the adjustable constant current circuit 121-2 to decrease to the operating drive current. Since the adjustable constant current circuit 121-2 is connected in series with the signal transmitter 122, the drive current through the signal transmitter 122 also decreases to the operating drive current, and the transmission power of the signal transmitter 122 also decreases to the operating power. Experiments have determined the magnitude of the decrease in the PWM signal duty cycle so that when the signal transmitter 122 transmits an optical signal at operating power, the following two conditions are simultaneously met:

[0048] 1. The power of the reflected signal 2 received by the signal receiver 123 is less than the preset value of the signal receiver 123. After receiving the reflected signal 2, the signal receiver 123 outputs a second received signal.

[0049] 2. The light signal emitted by the signal transmitter 122 at its operating power is reflected by the obstacle 4 located within a certain distance in the direction of the switch front cover 111 to form an inductive feedback signal 3. The power of the inductive feedback signal 3 received by the signal receiver 123 is equal to or greater than the preset value of the signal receiver 123, and the signal receiver 123 outputs the first received signal.

[0050] When the smart switch is in operation, the controller 121-1 transmits a working current signal to the signal transmitter 122 via the adjustable constant current circuit 121-2. The signal transmitter 122 receives the working current signal and emits a second light signal towards the front cover 111 of the switch. The second light signal, extending through the front cover 111, encounters an obstacle 4, such as a hand, placed within a certain distance of the front cover 111, and is then emitted, generating a feedback signal 3. The signal receiver 123 receives the feedback signal 3 and outputs a first received signal. The controller 121-1 receives the first received signal and transmits a control command signal to the electronic device 5.

[0051] Different signal receivers 123 may have inconsistent sensitivities to receiving optical signals due to manufacturing processes. Therefore, each signal receiver 123 may require a different threshold for the minimum incident optical power needed to generate a valid electrical signal, i.e., a preset value. The smart switch can only function normally, correctly interpret gestures, and control the electronic device 5 when the optical signal power received by the signal receiver 123 is equal to or greater than the preset value. Since the sensitivity of the signal receiver 123 is not adjustable, each smart switch needs to be individually debugged, and the transmission power of the signal transmitter 122 needs to be determined based on the different signal receivers 123 used.

[0052] By applying the aforementioned intelligent switch, the transmission power of the signal transmitter 122 can be adaptively adjusted. For a highly sensitive signal receiver 123, the threshold for the minimum incident light power required is small, meaning the preset value for the signal receiver 123 is small, and the required transmission power of the signal transmitter 122 is also small, thereby reducing the transmission power of the signal transmitter 122. Conversely, for a low-sensitivity signal receiver 123, the threshold for the minimum incident light power required is large, meaning the preset value for the signal receiver 123 is large, and the required transmission power of the signal transmitter 122 is also large, thereby increasing the transmission power of the signal transmitter 122. Ultimately, this ensures that the gain of the entire loop is essentially consistent, thereby enabling accurate judgment of gestures and proper control of the electronic device 5.

[0053] Because different materials are used for the switch front cover 111, the reflectivity, refractive index, and transmittance of different materials will vary for different light signals, resulting in different power of the light signal reaching the signal receiver 123. Using the above-mentioned smart switch eliminates the need for individual adjustments to the smart switch based on the material used for the switch front cover 111. The smart switch can adaptively change the transmission power of the signal transmitter 122 according to the material used for the switch front cover 111, thereby correctly judging gestures and controlling the electronic device 5.

[0054] The intelligent switch provided in this application adaptively adjusts the transmission power of the signal transmitter 122, ensuring that the power of the reflected signal 2 reaching the signal receiver 123 is less than a preset value for the receiver 123. This avoids abnormal operation of the electronic device caused by interference from the reflected signal 2, and prevents the intelligent switch from failing to control the normal operation of the electronic device. This application utilizes the reflected signal to adaptively adjust the drive signal of the adjustable constant current circuit, enabling the signal transmitter to emit a second light signal according to the working drive signal. The controller transmits control command signals to the electronic device based on the feedback signal from the reflection of the second light signal by an obstacle, thus realizing the control of the normal operation of the electronic device by the infrared gesture sensing switch and ensuring the effectiveness and stability of the infrared gesture sensing switch.

[0055] In one implementation, such as Figure 5 As shown, to remove noise, smooth waveforms, and convert digital signals to analog signals, the control signal transmitting circuit 121 further includes a filter circuit 124. The filter circuit 124 is connected between the second port of the controller 121-1 and the input terminal of the adjustable constant current circuit 121-2. The filter circuit 124 can be a second-order filter circuit composed of two cascaded first-order filter circuits. The second-order filter circuit may include: a first resistor R1, a second resistor R2, a first capacitor C1, and a second capacitor C2. The input terminal of the first resistor R1 is connected to the second port of the controller 121-1, the output terminal of the first resistor R1 is connected to the input terminal of the second resistor R2, and the output terminal of the second resistor R2 is connected to the input terminal of the adjustable constant current circuit 121-2. The input terminal of the first capacitor C1 is connected to the output terminal of the first resistor R1, the input terminal of the second capacitor C2 is connected to the output terminal of the second resistor C2, and both the output terminals of the first capacitor C1 and the second capacitor C2 are grounded.

[0056] The controller 121-1 can be a microcontroller unit (MCU) or a single-chip microcomputer.

[0057] The adjustable constant current circuit 121-2 may include a switching element and a load. The switching element may be an NPN transistor Q1, and the load may be a third resistor R3. The collector of the NPN transistor Q1 is connected to the output terminal of the signal transmitter 122, the base of the transistor Q1 is connected to the output terminal of the second resistor R2, the emitter of the transistor Q1 is connected to the input terminal of the third resistor R3, and the output terminal of the third resistor is grounded.

[0058] The signal transmitter 122 can be an infrared emitting tube, such as an infrared emitting diode. The input terminal of the infrared emitting tube is connected to the third port of the MCU, and the output terminal of the infrared emitting tube is connected to the collector of the transistor.

[0059] Signal receiver 123 can be an infrared remote control receiver. The IR pin of the infrared remote control receiver is connected to the first port of the MCU, the GND pin of the infrared receiver is grounded, and the VCC pin of the infrared receiver is connected to the power supply.

[0060] The drive signal transmitted from the third port of the MCU to the signal transmitter 122 can control the transmission frequency of the optical signal emitted by the signal transmitter 122 in the form of a modulated carrier wave. For example, the third port of the MCU can transmit a modulated 38K carrier signal to the signal transmitter 122.

[0061] The second port of the MCU can output a PWM signal. After passing through the filter circuit 124, the PWM signal is converted into a voltage signal. When the voltage signal is low, the collector and emitter of the transistor are cut off, and the infrared emitting diode does not emit a signal. When the voltage signal is high, the collector and emitter of transistor Q1 are turned on, and the circuit consisting of the infrared emitting diode, transistor Q1, and the third resistor R3 connected in series is turned on and forms a loop. The infrared emitting diode emits a light signal in the direction of the switch front cover 111.

[0062] The voltage value of the drive signal output from the third port of the MCU is U1. The average output voltage of the PWM signal output from the second port of the MCU after passing through the filter circuit 124 is U2. The voltage drop of the PN junction of transistor Q1 is V. be The resistance of the third resistor R3 is R3. When U1 provides sufficient voltage, the adjustable constant current circuit 121-2 satisfies:

[0063] (1)

[0064] The MCU modulates the PWM signal's duty cycle, gradually widening it. As the PWM duty cycle increases, the average output voltage U2 at the base of transistor Q1 gradually increases after passing through filter circuit 124. The voltage value U1 of the drive signal output from the MCU's third port remains constant, and the voltage drop V at the PN junction of transistor Q1... be When the resistance R3 of the third resistor remains constant, it can be seen from equation (1) that the current in the circuit increases. Since the infrared emitting tube is connected in series with the adjustable constant current circuit 121-2, the current flowing through the infrared emitting tube also increases with the increase of the duty cycle of the PWM signal. The emission power of the infrared emitting tube gradually increases with the increase of the current flowing through the infrared emitting tube, that is, the emission power of the infrared emitting tube increases with the increase of the duty cycle of the PWM signal.

[0065] The MCU's first port receives signals transmitted from the infrared remote control receiver. When the power of the light signal received by the infrared remote control receiver is less than a preset value, the infrared remote control receiver outputs a second receive signal. When the power of the light signal received by the infrared remote control receiver is equal to or greater than the preset value, the infrared remote control receiver outputs a first receive signal. The MCU controls the operating state of the electronic device 5 based on the first receive signal. The preset value of the light signal power received by the infrared remote control receiver is determined by the specific components of the infrared remote control receiver selected in the actual application.

[0066] The 38K carrier light signal emitted by the infrared LED reaches the front cover 111 of the switch. Part of the light signal can penetrate the front cover 111 and continue extending, while part of the light signal is reflected at the front cover 111, generating a transmission signal 2. Because the duty cycle of the MCU modulates the PWM signal, it changes from narrow to wide, and the PWM signal duty cycle gradually increases. Therefore, the transmission power of the infrared LED also gradually increases, and the power of the reflected signal 2 received by the infrared remote control receiver also gradually increases. When the power of the reflected signal 2 received by the infrared remote control receiver is less than a preset value, the infrared remote control receiver outputs a second receiving signal. When the power of the reflected signal 2 received by the infrared remote control receiver is equal to or greater than the preset value, the infrared remote control receiver outputs a first receiving signal. After receiving the first receiving signal from the infrared remote control receiver, the MCU's first port stops increasing the duty cycle of the PWM signal. At this point, the transmission power of the infrared LED can be determined as the maximum transmission power within the scanning period. The maximum transmission power of the infrared LED within the scanning period is determined by the reflection from the front cover 111 of the switch. When the infrared transmitter's transmission power is less than the maximum transmission power and there are no obstacles 4 within a certain distance from the switch front cover 111 (i.e., the smart switch is in a non-working state), the power of the 38K carrier signal transmitted by the infrared transmitter received by the infrared remote control receiver is less than the preset value, which will not cause the infrared remote control receiver to output the first receiving signal and will not cause the electronic device 5 to have an abnormal working state.

[0067] Upon receiving the first signal from the infrared remote control receiver, the MCU reduces the duty cycle of the PWM signal, lowering the current of the adjustable constant current circuit 121-2 to the operating current, thus adjusting the transmission power of the infrared transmitter to the operating power. Experiments determined the optimal reduction range of the PWM signal duty cycle to ensure that the infrared transmitter emits a light signal at its operating power while simultaneously satisfying the following two conditions:

[0068] 1. The power of the reflected signal 2 received by the infrared remote control receiver is less than the preset value of the infrared remote control receiver. After receiving the reflected signal 2, the infrared remote control receiver outputs the second received signal.

[0069] 2. The light signal emitted by the infrared transmitter at its working power is reflected by an obstacle 4 within a certain distance in the direction of the switch front cover 111 to form an induction feedback signal 3. The power of the induction feedback signal 3 received by the infrared remote control receiver is equal to or greater than a preset value, and the infrared remote control receiver outputs the first receiving signal.

[0070] Based on the above, the working principle of the smart switch provided in this application is described below:

[0071] The MCU's third port transmits a 38K carrier signal to the infrared emitting diode. The MCU's second port outputs a PWM signal. The circuit consisting of the infrared emitting diode, transistor Q1, and the third resistor R3 connected in series is turned on and forms a loop, causing the infrared emitting diode to emit the first light signal. The first light signal reaches the front cover 111 of the switch. Part of the light signal can pass through the front cover of the switch and continue to extend, while part of the light signal is reflected at the front cover 111 of the switch, generating the transmitted signal 2.

[0072] When the smart switch is in a non-operating state, the MCU modulates the duty cycle of the PWM signal, gradually widening it. As the PWM duty cycle increases, the transmission power of the infrared emitter also gradually increases, and the power of the reflected signal 2 received by the infrared remote control receiver also gradually increases. When the power of the reflected signal 2 received by the infrared remote control receiver is less than a preset value, the infrared remote control receiver outputs a second receiving signal. When the power of the reflected signal 2 received by the infrared remote control receiver is equal to or greater than the preset value, the infrared remote control receiver outputs a first receiving signal. Because the power of the reflected signal 2 received by the infrared remote control receiver gradually increases, the infrared remote control receiver first outputs the second receiving signal, and then outputs the first receiving signal. Upon receiving the first receiving signal from the infrared remote control receiver, the MCU reduces the duty cycle of the PWM signal, lowering the drive current of the adjustable constant current circuit 121-2 to the operating current, thus adjusting the transmission power of the infrared emitter to the operating power. Experiments have determined the magnitude of the PWM signal duty cycle reduction so that when the infrared emitter transmits a light signal at operating power, the following two conditions are simultaneously met:

[0073] 1. The power of the reflected signal 2 received by the infrared remote control receiver is less than the preset value of the infrared remote control receiver. After receiving the reflected signal 2, the infrared remote control receiver outputs the second received signal.

[0074] 2. The light signal emitted by the infrared transmitter at its working power is reflected by an obstacle 4 within a certain distance in the direction of the switch front cover 111 to form an induction feedback signal 3. The power of the induction feedback signal 3 received by the infrared remote control receiver is equal to or greater than a preset value, and the infrared remote control receiver outputs the first receiving signal.

[0075] When the smart switch is in operation, the infrared transmitter emits a second light signal according to the drive signal transmitted from the third port of the MCU. The second light signal reaches the front cover 111 of the switch. Part of the light signal can pass through the front cover 111 and continue to extend. After being reflected by an obstacle 4 within a certain distance in the direction of the front cover 111, it forms an induction feedback signal 3; part of the light signal is reflected at the front cover 111, generating an emission signal 2. The second port of the MCU outputs a PWM signal, so that the current of the adjustable constant current circuit 121-2 is the operating current, and the emission power of the infrared emitter is the operating power. The infrared remote control receiver receives the induction feedback signal 3. According to the induction feedback signal 3, the infrared receiver 123 outputs a first reception signal. The MCU transmits a control command signal to the electronic device 5 according to the first reception signal to control the working state of the electronic device 5.

[0076] When the filtering requirements are not very high, and only simple signal smoothing or preliminary noise filtering is needed, the filter circuit 124 can also be a first-order filter circuit 124.

[0077] like Figure 6 As shown, the filter circuit 124 can be a first-order filter circuit, which includes a first resistor R1 and a first capacitor C1. The input terminal of the first resistor R1 is connected to the second port of the controller 121-1, and the output terminal of the first resistor R1 is connected to the adjustable constant current circuit 121-2. The input terminal of the first capacitor C1 is connected to the output terminal of the first resistor R1, and the output terminal of the first capacitor C1 is grounded.

[0078] The control signal transmitting circuit includes controller 121-1, infrared emitting tube, adjustable constant current circuit 121-2, and infrared remote control receiver. Figure 5 The examples shown are all the same, so they will not be described in detail here.

[0079] In one embodiment, the switching element can be a metal-oxide-semiconductor field-effect transistor (MOFET), such as an N-channel enhancement-mode MOFET (NMOS). The drain of the NMOS transistor is connected to the output terminal of the infrared emitter, the source of the NMOS transistor is connected to the load, and the gate of the NMOS transistor is connected to the output terminal of the filter circuit 124. When the voltage signal output by the filter circuit 124 is greater than the drain voltage, the NMOS transistor is turned on. When the voltage signal output by the filter circuit 124 is less than the drain voltage, the NMOS transistor is turned off.

[0080] The control signal transmitting circuit includes controller 121-1, infrared emitting tube, filter circuit 124, load, and infrared remote control receiver. Figure 5 The examples shown are all the same, so they will not be described in detail here.

[0081] By applying the aforementioned intelligent switch, the transmission power of the signal transmitter 122 can be adaptively adjusted based on the different components used in the signal transmitter 123 and the different materials used in the switch front cover 111. For a highly sensitive signal receiver 123, the threshold for the minimum incident light power required is small, meaning the preset value for the signal receiver 123 is small, and the required transmission power of the signal transmitter 122 is also small, thus reducing the transmission power of the signal transmitter 122. Conversely, for a low-sensitivity signal receiver 123, the threshold for the minimum incident light power required is large, meaning the preset value for the signal receiver 123 is large, and the required transmission power of the signal transmitter 122 is also large, thus increasing the transmission power of the signal transmitter 122. Ultimately, this ensures that the gain of the entire loop is basically consistent, thereby correctly judging gestures and correctly controlling the electronic device 5.

[0082] The intelligent switch provided in this application can adaptively adjust the transmission power of the signal transmitter 122, ensuring that the power of the reflected signal 2 reaching the signal receiver 123 is less than a preset value of the signal receiver 123. This avoids abnormal operating conditions of the electronic device caused by interference from the reflected signal 2, and prevents the intelligent switch from failing to control the normal operating state of the electronic device. This application utilizes the reflected signal to adaptively adjust the drive signal of the adjustable constant current circuit, enabling the signal transmitter to emit a second light signal according to the operating drive signal. The controller transmits control command signals to the electronic device based on the feedback signal from the reflection of the second light signal by an obstacle, thus realizing the control of the normal operating state of the electronic device by the infrared gesture sensing switch and ensuring the effectiveness and stability of the infrared gesture sensing switch.

[0083] During the use of a smart switch, drastic changes in ambient light can adversely affect the infrared remote control receiver. Ambient light typically contains infrared components; stronger ambient light reduces the signal-to-noise ratio (SNR) of the input signal to the infrared remote control receiver, making it more difficult for the receiver to identify useful signals. As ambient light intensifies, the automatic gain control (AGC) circuit in the infrared remote control receiver detects the overall increase in the input signal and reduces the receiver's gain—the amplification factor of the received light signal—to maintain a relatively stable output signal. If the infrared emitter's power remains constant, the reduced gain of the infrared remote control receiver results in a lower-than-preset power for the received feedback signal 3. Consequently, the receiver outputs a second received signal, making it unable to control the operation of the electronic device 5.

[0084] The aforementioned smart switch can solve the problem that the gesture sensor switch cannot control the electronic device 5 after changes in ambient light.

[0085] The MCU's third port transmits a 38K carrier signal to the infrared emitting diode. The MCU's second port outputs a PWM signal. The circuit consisting of the infrared emitting diode, transistor Q1, and the third resistor R3 connected in series is turned on and forms a loop, causing the infrared emitting diode to emit the first light signal. The first light signal reaches the switch front cover 111. Part of the light signal can pass through the switch front cover 111 and continue to extend, while part of the light signal is reflected at the switch front cover 111, generating the transmission signal 2.

[0086] When the smart switch is in a non-operating state, the MCU modulates the duty cycle of the PWM signal, gradually widening it. As the PWM duty cycle increases, the transmission power of the infrared LED also gradually increases, and the power of the reflected signal 2 received by the infrared remote control receiver also gradually increases. When the power of the reflected signal 2 received by the infrared remote control receiver is less than a preset value, the infrared remote control receiver outputs a second received signal. When the power of the reflected signal 2 received by the infrared remote control receiver is equal to or greater than the preset value, the infrared remote control receiver outputs a first received signal. Because the power of the reflected signal 2 received by the infrared remote control receiver gradually increases, the infrared remote control receiver first outputs the second received signal, and then outputs the first received signal. The MCU receives the first received signal from the infrared remote control receiver, at which point the transmission power of the infrared LED is the second maximum transmission power. Due to the influence of ambient light, the gain of the infrared remote control receiver changes, and the second maximum transmission power is the maximum transmission power of the infrared LED after the corresponding gain change. Upon receiving the first signal from the infrared remote control receiver, the MCU reduces the duty cycle of the PWM signal, lowering the current of the adjustable constant current circuit 121-2 to the second operating current, thus adjusting the transmission power of the infrared transmitter to the second operating power. Experiments determined the optimal reduction in the PWM signal duty cycle to ensure that when the infrared transmitter emits a light signal at the second operating power, the following two conditions are simultaneously met:

[0087] 1. The power of the reflected signal 2 received by the infrared remote control receiver is less than the preset value of the infrared remote control receiver. After receiving the reflected signal 2, the infrared remote control receiver outputs the second received signal.

[0088] 2. When the power of the induction feedback signal 3 received by the infrared remote control receiver is equal to or greater than the preset value of the infrared remote control receiver, the infrared remote control receiver outputs the first received signal.

[0089] When the smart switch is in operation, the infrared transmitter emits a second light signal according to the drive signal transmitted from the third port of the MCU. The second light signal reaches the front cover 111 of the switch. Part of the light signal can pass through the front cover 111 and continue to extend. After being reflected by an obstacle 4 within a certain distance in the direction of the front cover 111, it forms an induction feedback signal 3; part of the light signal is reflected at the front cover 111, generating an emission signal 2. The second port of the MCU outputs a PWM signal, making the current of the adjustable constant current circuit 121-2 the second operating current, and the emission power of the infrared emitter the second operating power. The infrared remote control receiver receives the induction feedback signal 3. According to the induction feedback signal 3, the infrared remote control receiver outputs a first receiving signal. The MCU transmits a control command signal to the electronic device 5 according to the first receiving signal to control the working state of the electronic device 5.

[0090] Strong changes in ambient light can interfere with the signal receiver of a smart switch, leading to a shortened working distance or complete inoperability of the gesture sensor. This application addresses this issue by using reflected signals to adaptively adjust the drive signal of an adjustable constant current circuit. This allows the signal transmitter to emit a second light signal based on changes in ambient light, and the controller to transmit control commands to the electronic device based on the feedback signal from the reflection of the second light signal by an obstacle. This overcomes the interference of strong ambient light changes on the infrared gesture sensor switch, enabling the infrared gesture sensor switch to control the normal operation of the electronic device and ensuring its effectiveness and stability.

[0091] Based on the above, this application also provides an adaptive signal control circuit, the circuit schematic of which is the same as... Figure 4 As shown.

[0092] It should be noted that the adaptive signal control circuit provided in this embodiment can be applied to any scenario requiring power control of circuit components, such as the aforementioned smart switch, infrared sensing device, etc. Figure 4 As shown, the adaptive signal control circuit includes: a controller 121-1, an adjustable constant current circuit 121-2, a signal transmitter 122, and a signal receiver 123. The first port of the controller 121-1 is connected to the signal receiver 123. The second port of the controller 121-1 is connected to the output terminal of the signal transmitter 122, and the adjustable constant current circuit 121-2 is connected between the second port of the controller 121-1 and the output terminal of the signal transmitter 122. The third port of the controller 121-1 is connected to the input terminal of the signal transmitter 122.

[0093] The controller 121-1 transmits a drive signal to the signal transmitter 122 via its third port, causing the signal transmitter 122 to emit a light signal toward the switch front cover 111. For example, when the third port of the controller 121-1 transmits a high-level signal to the signal transmitter 122, it indicates that the signal transmitter 122 is emitting a light signal toward the switch front cover; when the third port of the controller 121-1 transmits a low-level signal to the signal transmitter 122, it indicates that the signal transmitter 122 is not emitting a light signal.

[0094] Signal receiver 123 is used to receive optical signals. When the power of the optical signal received by signal receiver 123 is less than a preset value, signal receiver 123 outputs a second received signal. When the power of the optical signal received by signal receiver 123 is equal to or greater than the preset value, signal receiver 123 outputs a first received signal. For example, when the power of the optical signal received by signal receiver 123 is less than the preset value, it outputs a low-level signal; when the power of the optical signal received by signal receiver 123 is equal to or greater than the preset value, it outputs a high-level signal. The signal output by signal receiver 123 is transmitted to controller 121-1 through the first port of controller 121-1.

[0095] Based on the signal sent by the signal receiver 123, the controller 121-1 sends an adjustment command to the adjustable constant current circuit 121-2 through its second port, adjusting the drive current of the adjustable constant current circuit 121-2 and the drive current of the signal transmitter 122. For example, the controller 121-1 sends a PWM signal through its second port and adjusts the duty cycle of the PWM signal according to the received signal from the signal receiver 123, thereby adjusting the current of the adjustable constant current circuit 121-2, which in turn adjusts the current of the signal transmitter 122, and consequently, the transmission power of the signal transmitter 122.

[0096] Controller 121-1 controls the output of the PWM signal, with the pulse width gradually increasing from narrow to wide, and the duty cycle of the PWM signal gradually increasing. This causes the drive current through the adjustable constant current circuit 121-2 to gradually increase, and the transmission power of the signal transmitter 122 to gradually increase as well. Controller 121-1 transmits a drive signal to the signal transmitter 122 via its third port, causing the signal transmitter 122 to emit a light signal towards the switch front cover 111. Part of the light signal emitted by the signal transmitter 122 extends through the switch front cover 111, and part of the light signal reaches the switch front cover 111 and is emitted. The light signal emitted by the signal transmitter 122 and reflected by the switch front cover is received by the signal receiver 123. When the power of the light signal received by the signal receiver 123 is less than a preset value, the signal receiver 123 outputs a second received signal. When the power of the light signal received by the signal receiver 123 is equal to or greater than the preset value, the signal receiver 123 outputs a first received signal. The signal output by the signal receiver 123 is transmitted to controller 121-1 via the first port of controller 121-1. As the transmission power of the signal transmitter 122 gradually increases, the optical signal power received by the signal receiver 123 also gradually increases. Therefore, the signal transmitter 122 first outputs a second received signal, and as the transmission power of the signal transmitter 122 increases, it outputs a first received signal. When the controller 121-1 receives the first received signal from the signal receiver 123, it stops increasing the duty cycle of the PWM signal and then decreases the duty cycle of the PWM signal, so that the drive current through the adjustable constant current circuit 121-2 decreases to the operating current, and the transmission power of the signal transmitter 122 also decreases to the operating power. Experiments have determined the magnitude of the decrease in the PWM signal duty cycle so that when the signal transmitter 122 transmits the optical signal at operating power, the following two conditions are simultaneously met:

[0097] 1. The power of the reflected signal 2 received by the signal receiver 123 is less than the preset value of the signal receiver 123. After receiving the reflected signal 2, the signal receiver 123 outputs a second received signal.

[0098] 2. The light signal emitted by the signal transmitter 122 at its operating power is reflected by the obstacle 4 existing within a certain distance in the direction of the switch front cover 111 to form an inductive feedback signal 3. The power of the inductive feedback signal 3 received by the signal receiver 123 is equal to or greater than a preset value, and the signal receiver 123 outputs the first received signal.

[0099] The controller 121-1 transmits a working current signal to the signal transmitter 122 via the adjustable constant current circuit 121-2. The signal transmitter 122 receives the working current signal and emits a light signal towards the switch front cover 111. The light signal, extending through the switch front cover 111, encounters an obstacle 4 placed within a certain distance of the switch front cover, such as a hand, and is then emitted, forming an inductive feedback signal 3. The signal receiver 123 receives the inductive feedback signal 3 and outputs a first received signal. The controller 121-1 receives the first received signal and transmits a control command signal to the electronic device 5.

[0100] Based on the above, this application also provides a lighting system, such as... Figure 7 As shown, Figure 7 This is a schematic diagram of a lighting system provided in this application. The lighting system includes an electronic device 5 and a smart switch 1. The smart switch 1 is the aforementioned smart switch. The smart switch 1 controls the working state of the electronic device 5 based on a sensing feedback signal 3, such as a feedback signal generated when a hand is placed on the front end of the switch cover. The smart switch 1 ensures the stability of the operation of the electronic device 5 and avoids problems such as malfunction or ineffectiveness of the electronic device 5 due to reflected signals 2 generated by the switch cover 111 or strong changes in ambient light.

[0101] Based on the above, this application also provides an intelligent lighting device, such as... Figure 8 As shown, Figure 8 This is a structural schematic diagram of an intelligent lighting device provided in this application. The intelligent lighting device includes a housing 6, a light source 7 located within the housing 6, and a control circuit board 8. The control circuit board 8 is equipped with the aforementioned adaptive signal control circuit, which controls the operating state of the light source 7 located within the housing 6 based on the induction feedback signal 3. For example, in a sensor-activated night light, the bulb and control circuit board 8 are placed inside a lampshade. When a hand is placed within a certain distance of the lampshade, the infrared signal emitted by the signal transmitter 122 on the control circuit board 8 is reflected by the hand and received by the signal receiver 123 on the control circuit board 8, thereby controlling the operating state of the sensor-activated night light.

[0102] Although this application discloses preferred embodiments as described above, it is not intended to limit this application. Any person skilled in the art can make possible changes and modifications without departing from the spirit and scope of this application. Therefore, the scope of protection of this application should be determined by the scope defined in the claims of this application.

Claims

1. An intelligent switch, characterized in that, The utility model relates to a kind of intelligent switch, including: Switch body and switch control device arranged in the switch body; The switch body includes: switch back cover and switch front cover, and the switch back cover and the switch front cover are matched and connected; The switch control device includes: control signal emitting circuit, signal transmitter and signal receiver; The control signal emitting circuit includes: controller and adjustable constant current circuit;The first port of the controller is connected with the signal receiver;The second port of the controller is connected with the output end of the signal transmitter, and the adjustable constant current circuit is connected between the second port and the output end of the signal transmitter;The third port of the controller is connected with the input end of the signal transmitter; The controller transmits driving signal to the signal transmitter through the third port, so that the signal transmitter emits light signal to the direction of the switch front cover; When the intelligent switch is in non-working state, the signal receiver receives the reflected signal of the first light signal reflected by the switch front cover, and transmits the reflected signal to the controller;The controller will send adjustment instruction to the adjustable constant current circuit according to the reflected signal, and the adjustable constant current circuit adjusts the driving signal to working driving signal; When the intelligent switch is in working state, the signal transmitter emits second light signal according to the working driving signal, the signal receiver receives the sensing feedback signal of the second light signal reflected by the obstacle, and the controller transmits control instruction signal to electronic equipment according to the received sensing feedback signal.

2. The intelligent switch of claim 1, wherein, The control signal emitting circuit further includes: filter circuit, which is connected between the second port of the controller and the adjustable constant current circuit.

3. The intelligent switch of claim 2, wherein, The filter circuit includes: first-order filter circuit or second-order filter circuit; The first-order filter circuit includes: first resistor and first capacitor;The input end of the first resistor is connected to the second port of the controller, the input end of the first capacitor is connected to the output end of the first resistor, and the output end of the first capacitor is grounded; The second-order filter circuit includes: two first-order filter circuits connected in series.

4. The intelligent switch of claim 2, wherein, The controller transmits PWM signal to the filter circuit through the second port, and the filter circuit converts the PWM signal into analog signal and transmits it to the input end of the adjustable constant current circuit.

5. The intelligent switch of claim 1, wherein, The adjustable constant current circuit includes: switching element and load;The switching element and the load are connected in series and located between the output end of the signal transmitter and the ground.

6. The intelligent switch of claim 5, wherein, The switching element is a triode, and the load is a third resistor;The collector of the triode is connected with the signal transmitter, the base of the switching element is connected with the filter circuit, and the emitter of the switching element is connected with the input end of the third resistor;The output end of the third resistor is grounded.

7. The intelligent switch of claim 1, wherein, The driving signal transmitted by the controller to the signal transmitter through the third port controls the emission frequency of the light signal in the form of modulated carrier wave.

8. An adaptive signal control circuit, characterized by The utility model relates to a kind of intelligent switch, including: Controller, adjustable constant current circuit, signal transmitter and signal receiver;The first port of the controller is connected with the signal receiver; The second port of the controller is connected to the output terminal of the signal transmitter, and the adjustable constant current circuit is connected between the second port and the output terminal of the signal transmitter; the third port of the controller is connected to the input terminal of the signal transmitter. The controller transmits a drive signal to the signal transmitter via the third port, so that the signal transmitter emits an optical signal; When the signal receiver receives the reflected signal of the light signal reflected by the signal transmitter cover, and transmits the reflected signal to the controller; the controller will send an adjustment command to the adjustable constant current circuit according to the reflected signal, and the adjustable constant current circuit will adaptively adjust the drive signal to a working drive signal; The controller transmits the working drive signal to the signal transmitter via the adjustable constant current circuit. The signal transmitter emits a second optical signal according to the working drive signal. The signal receiver receives the inductive feedback signal reflected by the obstacle from the second optical signal. The controller transmits control command signals to the electronic device according to the received inductive feedback signal.

9. A lighting system, characterized by include: An electronic device and a smart switch; the smart switch is the smart switch described in any one of claims 1-7; the smart switch controls the operating state of the electronic device based on a sensing feedback signal.

10. A smart lighting device, characterized in that include: The housing, and a light source and a control circuit board located within the housing; the control circuit board is provided with an adaptive signal control circuit as described in claim 8; the adaptive signal control circuit controls the working state of the light source according to the induction feedback signal.

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