Low-power electric appliance control circuit and device

Abstract

The utility model relates to low -power consumption electric appliance control circuit and device, its circuit includes: infrared induction unit for sensing moving human body, microwave induction unit for starting to sense micro - movement human body in the time discontinuity of the infrared induction unit sensing the moving human body, the appliance control unit for outputting the appliance opening signal when sensing the moving human body or the micro - movement human body and outputting the appliance closing signal after the microwave induction unit sensing the micro - movement human body, the control unit connected with the infrared induction unit, the microwave induction unit and the appliance control unit, the battery unit connected with the infrared induction unit, the microwave induction unit, the appliance control unit and control unit, the utility model can reduce the power consumption of microwave induction unit significantly, and then prolongs the power -on duration of battery unit, makes the user not to need frequently to replace battery or charge, improves user experience.

Description

Technical Field

[0001] This utility model relates to the field of human body sensing technology, and in particular to low-power electrical control circuits and devices. Background Technology

[0002] Smart home appliances are currently very popular with consumers. Their control circuits can sense whether a person has entered a designated activity area and control related appliances (such as air conditioners and exhaust fans) to operate when a person is detected, thus improving the user experience. Among related technologies, microwave sensing units (or microwave radar) are widely used in appliance control circuits because they can sense both moving and stationary human bodies. However, microwave sensing units suffer from high power consumption. Prolonged operation leads to high power consumption in the appliance control circuit, causing rapid battery depletion and requiring frequent battery replacements or recharging, thus impacting the user experience. Utility Model Content

[0003] The technical problem to be solved by this utility model is to provide a low-power electrical control circuit and device.

[0004] The technical solution adopted by this utility model to solve its technical problem is: to construct a low-power electrical appliance control circuit, including:

[0005] Infrared sensing unit for sensing the movement of the human body;

[0006] A microwave sensing unit is used to intermittently activate to sense micro-movements of the human body when the infrared sensing unit fails to detect the moving human body.

[0007] An electrical control unit for outputting an electrical appliance turn-on signal when the moving human body or the micro-moving human body is sensed, and outputting an electrical appliance turn-off signal after the microwave sensing unit no longer senses the micro-moving human body;

[0008] A control unit connected to the infrared sensing unit, the microwave sensing unit, and the electrical control unit;

[0009] A battery unit connected to the infrared sensing unit, the microwave sensing unit, the electrical control unit, and the control unit.

[0010] Preferably, the infrared sensing unit includes a PIR sensor P1 and a fourteenth resistor R14;

[0011] The power supply terminal of the PIR sensor P1 is connected to the battery unit, the ground terminal of the PIR sensor P1 is grounded, the output terminal of the PIR sensor P1 is connected to the control unit, and the output terminal of the PIR sensor P1 is also grounded through the fourteenth resistor R14.

[0012] Preferably, the microwave sensing unit includes a driver chip U2, a third inductor L3, an eighth capacitor C8, a first receiving antenna ANT1, a second receiving antenna ANT2, and a transmitting antenna ANT3;

[0013] The switching terminal of the driver chip U2 is grounded through the third inductor L3 and the eighth capacitor C8. The first receiving antenna connection terminal, the second receiving antenna connection terminal, and the transmitting antenna connection terminal of the driver chip U2 are sequentially connected to the first receiving antenna ANT1, the second receiving antenna ANT2, and the transmitting antenna ANT3.

[0014] Preferably, the electrical control unit includes a ZigBee communication module, a Bluetooth module, an infrared transmitting module, a WiFi module, or an NFC communication module.

[0015] Preferably, the electrical control unit includes an infrared transceiver chip U4, a third resistor R3, an infrared receiver IR1, and multiple infrared transmitters D1;

[0016] The infrared transceiver chip U4 has its infrared transceiver terminal connected to the first terminal of the third resistor R3 and the cathode of each infrared emitting tube D1. The anode of each infrared emitting tube D1 is connected to the battery cell. The second terminal of the third resistor R3 is connected to the output terminal of the infrared receiving tube IR1. The ground terminal of the infrared receiving tube IR1 is connected to the control unit.

[0017] Preferably, the battery cell comprises:

[0018] Dry cell battery assembly;

[0019] A voltage conversion unit connected to the dry cell battery assembly, the infrared sensing unit, the microwave sensing unit, the electrical control unit, and the control unit, for converting the dry cell battery assembly into DC power to supply power to each unit.

[0020] Preferably, the voltage conversion unit includes a linear regulator U3, a first capacitor assembly, and a second capacitor assembly;

[0021] The input terminal of the linear regulator U3 is connected to the dry cell battery assembly. The input terminal of the linear regulator U3 is also grounded through the first capacitor assembly. The output terminal of the linear regulator U3 is grounded through the second capacitor assembly. The output terminal of the linear regulator U3 is also connected to the infrared sensing unit, the microwave sensing unit, the electrical control unit, and the control unit.

[0022] Preferably, the low-power electrical control circuit further includes an indicator unit connected to the control unit for displaying the circuit's operating status.

[0023] Preferably, the indicator unit includes an indicator light RLED and a ninth resistor R9, with the anode of the indicator light RLED connected to the battery cell and the cathode of the indicator light RLED connected to the control unit via the ninth resistor R9.

[0024] This invention also provides a low-power electrical control device, including the low-power electrical control circuit described above.

[0025] The technical solution of this utility model uses an infrared sensing unit to control the electrical appliances to turn on when a moving human body is detected in the activity area. When the infrared sensing unit cannot detect a slightly moving human body in the activity area, the microwave sensing unit is intermittently activated, thus detecting the slightly moving human body and controlling the electrical appliances to turn on. This ensures that the electrical appliances can be turned on when a moving human body and / or a slightly moving human body is present in the activity area. Furthermore, the intermittent activation of the microwave sensing unit can significantly reduce the power consumption of the microwave sensing unit, thereby extending the power supply time of the battery unit and eliminating the need for users to frequently replace batteries or recharge, thus improving the user experience. Attached Figure Description

[0026] The present invention will be further described below with reference to the accompanying drawings and embodiments. In the accompanying drawings:

[0027] Figure 1 This is a circuit structure block diagram of a low-power electrical appliance control circuit in some embodiments of this utility model;

[0028] Figure 2 This is a circuit diagram of the infrared sensing unit in some embodiments of this utility model;

[0029] Figure 3 This is a circuit diagram of the infrared sensing unit in some embodiments of this utility model;

[0030] Figure 4 This is a circuit diagram of the microwave induction unit in some embodiments of this utility model;

[0031] Figure 5 This is a circuit diagram of the control unit in some embodiments of this utility model;

[0032] Figure 6 This is a circuit diagram of the battery cell in some embodiments of this utility model;

[0033] Figure 7 This is a circuit diagram of the indicator unit in some embodiments of this utility model. Detailed Implementation

[0034] To provide a clearer understanding of the technical features, objectives, and effects of this utility model, the specific embodiments of this utility model will now be described in detail with reference to the accompanying drawings.

[0035] In the following description, it should be understood that the orientations or positional relationships indicated by terms such as "front," "rear," "up," "down," "left," "right," "longitudinal," "horizontal," "vertical," "horizontal," "top," "bottom," "inner," "outer," "head," and "tail" are based on the orientations or positional relationships shown in the accompanying drawings, and are constructed and operated in a specific orientation. They are only for the convenience of describing this technical solution and do not indicate that the device or component referred to must have a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0036] Figure 1 This is a circuit structure block diagram of a low-power appliance control circuit in some embodiments of the present invention. The low-power appliance control circuit can sense whether there is human activity in a set activity area (determined by the installation position of the low-power appliance control circuit) on the basis of low power consumption, and control the start of appliances such as air conditioners and exhaust fans when human activity is detected, and turn off the appliances when no human activity is detected.

[0037] like Figure 1 As shown, the low-power electrical control circuit may include an infrared sensing unit 1, a microwave sensing unit 2, an electrical control unit 3, a control unit 4, and a battery unit 5.

[0038] Infrared sensing unit 1 is used to sense moving human bodies. Moving human bodies refer to human bodies that are making large-scale movements, including walking and large-scale movements (including large-scale swaying of the upper arms, legs and waist).

[0039] In some embodiments, such as Figure 2 As shown, the infrared sensing unit 1 may include a PIR sensor P1 and a fourteenth resistor R14. The power supply terminal of the PIR sensor P1 is connected to the battery unit 5, the ground terminal of the PIR sensor P1 is grounded, the output terminal of the PIR sensor P1 is connected to the control unit 4, and the output terminal of the PIR sensor P1 is also grounded through the fourteenth resistor R14.

[0040] In this embodiment, the PIR sensor P1 can be an existing passive infrared sensor. The fourteenth resistor R14 acts as a pull-down resistor, which can prevent the PIR sensor P1 from falsely detecting a moving human body due to the initial power-on or external interference, thus preventing the electrical appliance from being turned on erroneously.

[0041] It should be noted that the PIR sensor for sensing moving human bodies is a mature technology, meaning that the method of the control unit 4 and the infrared sensing unit 1 working together to sense moving human bodies can refer to existing technologies.

[0042] Since the output voltage of battery cell 5 may be superimposed with noise, this noise increases the risk of false detection by PIR sensor P1. To further avoid false detection by PIR sensor P1, in some embodiments, such as... Figure 2 As shown, the infrared sensing unit 1 may further include a first inductor L1, a second inductor L2, and a first capacitor C1. The first inductor L1 is connected in series between the power supply terminal of the PIR sensor P1 and the battery unit 5, the second inductor L2 is connected in series between the ground terminal of the PIR sensor P1 and ground, and the first capacitor C1 is connected in series between the power supply terminal of the PIR sensor P1 and the ground terminal. In this embodiment, the first inductor L1, the second inductor L2, and the first capacitor C1 form a filter circuit capable of filtering the output voltage of the battery unit 5. Preferably, the first inductor L1 and the second inductor L2 are inductors with the same inductance.

[0043] The microwave sensing unit 2 is used to intermittently activate when the infrared sensing unit 1 cannot detect a moving human body in order to detect micro-movements. Micro-movements refer to movements of the human body that are making small-amplitude movements, including natural vibrations, small-amplitude arm and leg swings, head shaking, etc. It should be noted that the activation and deactivation of the microwave sensing unit 2 is controlled by the control unit 4, and the "intermittent activation" of the microwave sensing unit 2 can be either periodic or intermittent.

[0044] The microwave induction unit 2 is activated periodically, meaning it starts once within each set switching cycle. Understandably, a longer set switching cycle results in a shorter operating time for the microwave induction unit 2, which helps reduce the output power of the battery unit 5. The set switching cycle can be customized as needed, for example, it could be 1 minute. It should be noted that the periodic control circuit module is a very mature technique in the field of circuit control; existing algorithms can be used to control the periodic activation of the microwave induction unit 2.

[0045] For the intermittent activation of microwave sensing unit 2, the detection of a moving human body by infrared sensing unit 1 can be used as a trigger condition. For example, after infrared sensing unit 1 detects a moving human body, if it fails to detect a moving human body for a certain period of time, microwave sensing unit 2 will periodically activate. When microwave sensing unit 2 detects a slightly moving human body, it will immediately deactivate. If microwave sensing unit 2 fails to detect a slightly moving human body during a certain activation cycle, it will be prohibited from continuing to periodically activate. Since infrared sensing unit 1 is always on, when infrared sensing unit 1 detects a moving human body again and fails to detect a moving human body for a certain period of time thereafter, microwave sensing unit 2 will periodically activate again. In this embodiment, the duration delay can be calculated using existing timing circuits, and the trigger circuits can be used to determine whether infrared sensing unit 1 and microwave sensing unit 2 are triggered. The processor can control the periodic activation of microwave sensing unit 2, thus enabling this embodiment to be implemented using pure hardware circuitry. Of course, it can also be implemented using a microcontroller program. It is understandable that the intermittent activation of microwave sensing unit 2 can also prevent microwave sensing unit 2 from running for a long time, thereby reducing the output power of battery unit 5.

[0046] In some embodiments, such as Figure 3 As shown, the microwave sensing unit 2 may include a driver chip U2, a third inductor L3, an eighth capacitor C8, a first receiving antenna ANT1, a second receiving antenna ANT2, and a transmitting antenna ANT3. The switching terminal of the driver chip U2 is grounded through the third inductor L3 and the eighth capacitor C8. The first receiving antenna connection terminal, the second receiving antenna connection terminal, and the transmitting antenna connection terminal of the driver chip U2 are sequentially connected to the first receiving antenna ANT1, the second receiving antenna ANT2, and the transmitting antenna ANT3.

[0047] In this embodiment, the driver chip U2 can be an existing 24G microwave sensor, preferably a 24G microwave sensor with multiple transmitting antennas to enable multi-person detection, such as the AT24MP1T2RS32A 24G microwave sensor. The first receiving antenna ANT1 and the second receiving antenna ANT2 can be existing microwave receiving antennas, and the transmitting antenna ANT3 can be an existing microwave transmitting antenna. The third inductor L3 and the eighth capacitor C8, together with the internal switching transistor of the driver chip U2, form an operating circuit to provide the driving voltage required for the transmitting antenna ANT3 to operate.

[0048] It should be noted that microwave radar sensing of micro-moving human bodies is a mature technology. The method of sensing micro-moving human bodies by using the driver chip U2 with the first receiving antenna ANT1, the second receiving antenna ANT2 and the transmitting antenna ANT3 can refer to existing technologies.

[0049] Of course, the microwave sensing unit 2 can also be replaced by an existing microwave radar module, such as the microwave radar module with model number Rd-03D.

[0050] The electrical control unit 3 is used to output an electrical appliance turn-on signal when a moving or slightly moving human body is detected, and to output an electrical appliance turn-off signal after the microwave sensing unit 2 no longer detects a slightly moving human body.

[0051] In some embodiments, the electrical control unit 3 may include an existing ZigBee communication module, Bluetooth module, infrared emitting module, WiFi module, or NFC communication module.

[0052] In another embodiment, such as Figure 4 As shown, the electrical control unit 3 may include an infrared transceiver chip U4, a third resistor R3, an infrared receiver IR1, and multiple infrared emitters D1. The infrared transceiver terminal of the infrared transceiver chip U4 is connected to the first terminal of the third resistor R3 and the cathode of each infrared emitter D1. The anode of each infrared emitter D1 is connected to the battery unit 5. The second terminal of the third resistor R3 is connected to the output terminal of the infrared receiver IR1. The ground terminal of the infrared receiver IR1 is connected to the control unit 4.

[0053] In this embodiment, the control unit 4 can also control the working state of the infrared transceiver chip U4 and the infrared receiver IR1 by controlling the level of the BUSY signal, so that the present invention can control the electrical appliance control unit 3 to be in a silent state when there is no need to control the on / off state of the electrical appliance, thereby reducing power consumption and further reducing the output power of the battery unit 5.

[0054] Optionally, the infrared transceiver chip U4 can be an infrared transceiver chip such as MS08DR08, ST16F62K6, or HXD019DU. Furthermore, there are five infrared emitting diodes D1, enabling the electrical control unit 3 to communicate with the electrical appliance in multiple directions to control the appliance to turn on or off.

[0055] The control unit 4 is connected to the infrared sensing unit 1, the microwave sensing unit 2, and the electrical control unit 3.

[0056] In some embodiments, such as Figure 5 As shown, the control unit 4 may include a processor U1, a first resistor R1, a thirteenth capacitor C13, a seventh capacitor C7, and a button KEY. The processor U1 can be an existing microprocessor or a single-chip microcomputer. The power supply terminal of the processor U1 is connected to the battery unit 5 via the first resistor R1. The first resistor R1 is a small-value resistor (e.g., 10 ohms) and mainly serves to limit current. The power supply terminal of the processor U1 is also grounded via the thirteenth capacitor C13. The seventh capacitor C7 is connected in parallel with the thirteenth capacitor C13, forming a filter circuit that decouples and improves the stability of the power supply to the processor U1. One of the I / O ports of the processor U1 is grounded via the button KEY, allowing the user to control the system reset or restart of the control unit 4 by pressing the button KEY. Multiple I / O ports of the processor U1 are connected to the infrared sensing unit 1, the microwave sensing unit 2, and the electrical control unit 3, respectively, to determine whether the infrared sensing unit 1 and the microwave sensing unit 2 are triggered by executing existing algorithms, and to control the operation of the electrical control unit 3 based on the specific triggering status of the infrared sensing unit 1 and the microwave sensing unit 2. It should be noted that controlling the microwave sensing unit 2 to start periodically and controlling the electrical appliance control unit 3 to start and stop the electrical appliances via the processor U1 are both mature technologies. For specific implementation methods, please refer to existing technologies, which will not be elaborated here.

[0057] Battery unit 5 is connected to infrared sensing unit 1, microwave sensing unit 2, electrical control unit 3 and control unit 4. Battery unit 5 is used to supply power to infrared sensing unit 1, microwave sensing unit 2, electrical control unit 3 and control unit 4.

[0058] In some embodiments, battery unit 5 may include a dry cell battery assembly and Figure 6The voltage conversion unit shown is a dry cell battery assembly. This assembly may include several dry cell batteries, which can be connected in series, parallel, or a series-parallel connection. While rechargeable batteries can also be used, considering that charging might temporarily render this invention unusable, this invention preferably uses a dry cell battery assembly for power supply.

[0059] The voltage conversion unit is connected to the dry cell battery assembly, infrared sensing unit 1, microwave sensing unit 2, electrical control unit 3 and control unit 4. The voltage conversion unit is used to convert the dry cell battery assembly into DC power to power each unit.

[0060] In some embodiments, such as Figure 6 As shown, the voltage conversion unit may include a linear regulator U3, a first capacitor assembly 41, and a second capacitor assembly 42. The linear regulator U3 can be an existing 3.3V linear regulator. The input terminal of the linear regulator U3 is connected to a dry cell battery assembly, and the input terminal of the linear regulator U3 is also grounded through the first capacitor assembly 41. The output terminal of the linear regulator U3 is grounded through the second capacitor assembly 42, and the output terminal of the linear regulator U3 is also connected to an infrared sensing unit 1, a microwave sensing unit 2, an electrical control unit 3, and a control unit 4.

[0061] In some embodiments, such as Figure 6 As shown, the first capacitor assembly 41 may include a second capacitor C2 and a third capacitor C3. The input terminal of the linear regulator U3 is grounded through the second capacitor C2, and the third capacitor C3 is connected in parallel with the second capacitor C2. The second capacitor C2 and the third capacitor C3 constitute a filter circuit capable of decoupling and filtering the output voltage of the dry cell assembly.

[0062] In some embodiments, such as Figure 6 As shown, the second capacitor assembly 42 may include a sixth capacitor C6, a fourth capacitor C4, and a fifth capacitor C5. The output terminal of the linear regulator U3 is grounded via the sixth capacitor C6, and the fourth capacitor C4 and the fifth capacitor C5 are connected in parallel with the sixth capacitor C6. The sixth capacitor C6, the fourth capacitor C4, and the fifth capacitor C5 constitute a filter circuit capable of decoupling and filtering the output voltage of the linear regulator U3.

[0063] In some embodiments, the low-power electrical control circuit may further include, for example, Figure 7 The indicator unit 6 is shown. The indicator unit 6 is connected to the control unit 4 and is used to display the circuit's operating status. For example, it will output a display signal when a moving or slightly moving human body is detected, informing the user to control the electrical appliance accordingly.

[0064] Furthermore, such as Figure 7As shown, the indicator unit 6 may include an indicator light RLED and a ninth resistor R9. The anode of the indicator light RLED is connected to the battery unit 5, and the cathode of the indicator light RLED is connected to the control unit 4 via the ninth resistor R9. When a moving or slightly moving human body is detected, the control unit 4 can control the indicator light RLED to flash at a certain frequency. This not only informs the user of the circuit's operating status but also prevents the indicator light RLED from remaining continuously lit, thus increasing power consumption.

[0065] The technical solution of this utility model uses an infrared sensing unit to control the electrical appliances to turn on when a moving human body is detected in the activity area. When the infrared sensing unit cannot detect a slightly moving human body in the activity area, the microwave sensing unit is intermittently activated, thus detecting the slightly moving human body and controlling the electrical appliances to turn on. This ensures that the electrical appliances can be turned on when a moving human body and / or a slightly moving human body is present in the activity area. Furthermore, the intermittent activation of the microwave sensing unit can significantly reduce the power consumption of the microwave sensing unit, thereby extending the power supply time of the battery unit and eliminating the need for users to frequently replace batteries or recharge, thus improving the user experience.

[0066] This invention also constructs a low-power electrical appliance control device, which includes a housing and a low-power electrical appliance control circuit provided in the embodiments of this invention disposed within the housing. Further, the device may also include fasteners for fixing the housing to a wall, furniture, or appliance. Fasteners include, but are not limited to, bolts, magnetic fasteners, suction cups, and wall stickers. Bolts are mainly used to fix the housing to a rough-surfaced wall, magnetic fasteners are used to fix the housing to furniture (such as a metal cabinet) or appliances (such as a refrigerator or air conditioner) with a paramagnetic housing, and suction cups and wall stickers are mainly used to fix the housing to a smooth-surfaced wall.

[0067] It is understood that the above embodiments only illustrate preferred embodiments of the present utility model, and their descriptions are relatively specific and detailed, but they should not be construed as limiting the scope of the present utility model patent. It should be noted that for those skilled in the art, the above technical features can be freely combined, and several modifications and improvements can be made without departing from the concept of the present utility model, all of which fall within the protection scope of the present utility model. Therefore, all equivalent transformations and modifications made within the scope of the claims of the present utility model should fall within the coverage of the claims of the present utility model.

Claims

1. A low-power electrical control circuit, characterized in that, include: Infrared sensing unit (1) for sensing moving human body; A microwave sensing unit (2) is intermittently activated to sense micro-movements of the human body when the infrared sensing unit (1) fails to detect the moving human body. An electrical control unit (3) is used to output an electrical appliance turn-on signal when the moving human body or the micro-moving human body is sensed, and to output an electrical appliance turn-off signal after the microwave sensing unit (2) no longer senses the micro-moving human body; A control unit (4) connected to the infrared sensing unit (1), the microwave sensing unit (2), and the electrical control unit (3); A battery unit (5) connected to the infrared sensing unit (1), the microwave sensing unit (2), the electrical control unit (3), and the control unit (4).

2. The low-power electrical control circuit according to claim 1, characterized in that, The infrared sensing unit (1) includes a PIR sensor P1 and a fourteenth resistor R14; The power supply terminal of the PIR sensor P1 is connected to the battery unit (5), the ground terminal of the PIR sensor P1 is grounded, the output terminal of the PIR sensor P1 is connected to the control unit (4), and the output terminal of the PIR sensor P1 is also grounded through the fourteenth resistor R14.

3. The low-power electrical control circuit according to claim 1, characterized in that, The microwave sensing unit (2) includes a driver chip U2, a third inductor L3, an eighth capacitor C8, a first receiving antenna ANT1, a second receiving antenna ANT2, and a transmitting antenna ANT3. The switching terminal of the driver chip U2 is grounded through the third inductor L3 and the eighth capacitor C8. The first receiving antenna connection terminal, the second receiving antenna connection terminal, and the transmitting antenna connection terminal of the driver chip U2 are sequentially connected to the first receiving antenna ANT1, the second receiving antenna ANT2, and the transmitting antenna ANT3.

4. The low-power electrical control circuit according to claim 1, characterized in that, The electrical control unit (3) includes a ZigBee communication module, a Bluetooth module, an infrared transmitting module, a WiFi module, or an NFC communication module.

5. The low-power electrical control circuit according to claim 1, characterized in that, The electrical control unit (3) includes an infrared transceiver chip U4, a third resistor R3, an infrared receiver IR1, and multiple infrared emitters D1; The infrared transceiver terminal of the infrared transceiver chip U4 is connected to the first terminal of the third resistor R3 and the cathode of each infrared emitting tube D1. The anode of each infrared emitting tube D1 is connected to the battery unit (5). The second terminal of the third resistor R3 is connected to the output terminal of the infrared receiving tube IR1. The ground terminal of the infrared receiving tube IR1 is connected to the control unit (4).

6. The low-power electrical control circuit according to claim 1, characterized in that, The battery cell (5) includes: Dry cell battery assembly; A voltage conversion unit connected to the dry cell battery assembly, the infrared sensing unit (1), the microwave sensing unit (2), the electrical control unit (3), and the control unit (4) for converting the dry cell battery assembly into DC power to supply power to each unit.

7. The low-power electrical control circuit according to claim 6, characterized in that, The voltage conversion unit includes a linear regulator U3, a first capacitor assembly (41), and a second capacitor assembly (42); The input terminal of the linear regulator U3 is connected to the dry cell battery assembly. The input terminal of the linear regulator U3 is also grounded through the first capacitor assembly (41). The output terminal of the linear regulator U3 is grounded through the second capacitor assembly (42). The output terminal of the linear regulator U3 is also connected to the infrared sensing unit (1), the microwave sensing unit (2), the electrical control unit (3), and the control unit (4).

8. The low-power electrical control circuit according to any one of claims 1 to 7, characterized in that, Also includes: An indicator unit (6) connected to the control unit (4) is used to display the circuit's operating status.

9. The low-power electrical control circuit according to claim 8, characterized in that, The indicator unit (6) includes an indicator light RLED and a ninth resistor R9. The anode of the indicator light RLED is connected to the battery unit (5), and the cathode of the indicator light RLED is connected to the control unit (4) via the ninth resistor R9.

10. A low-power electrical control device, characterized in that, Includes the low-power electrical control circuit as described in any one of claims 1 to 9.

Images