Alarm system for intelligent lock and intelligent lock

Abstract

The utility model discloses an alarm system for an intelligent lock and the intelligent lock, and the alarm system comprises a cat eye camera module which is arranged on the intelligent lock; the cat eye power supply module is connected with the cat eye camera module and is arranged on the intelligent lock; the infrared detection module is arranged on the intelligent lock; the microwave radar detection module is arranged on the intelligent lock; the control module is connected with the cat eye power supply module, the infrared detection module and the microwave radar detection module, and is used for outputting a control signal to the cat eye power supply module according to a first detection signal output by the infrared detection module and a second detection signal output by the microwave radar detection module; therefore, the cat eye power supply module supplies power to the cat eye camera module for snapshot. According to the technical scheme of the utility model, the infrared detection module is required to output the first detection signal and the microwave radar detection module is required to output the second detection signal at the same time, so that the phenomenon of wrong snapshot is reduced, that is, the number of starting times of the cat eye camera module is reduced, and the power consumption is further reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of smart locks, and in particular to an alarm system for smart locks and a smart lock. Background Art

[0002] With the development of technology, smart locks have been widely used due to their convenience and security. For example, smart locks have become the preferred door locks in homes and offices.

[0003] At present, smart locks are unlocked by using biometrics, passwords, and fingerprints. In order to further improve security, smart locks for home use are integrated with an alarm system. The alarm system is integrated with a PIR (Passive Infrared) sensor and a cat's eye camera module. The PIR sensor is used to detect whether an object is approaching. When an object approaches the smart lock, the PIR sensor sends a detection signal to activate the cat's eye camera module to capture the image, thereby improving security. At the same time, users can also remotely view the dynamics of the doorstep through a mobile phone APP (Application) to understand the safety status of the doorstep at any time, especially for elderly people or children living alone. However, in existing smart locks, since the PIR sensor has a large detection range and is sensitive to temperature, the cat's eye camera module is often activated when no object is approaching during use, resulting in false captures, and frequent activation leads to high power consumption.

[0004] Therefore, the prior art still needs to be improved and developed. Utility Model Content

[0005] In view of the above-mentioned deficiencies in the prior art, the purpose of the utility model is to provide an alarm system and a smart lock for a smart lock, so as to solve the problem that the alarm system on the smart lock in the prior art often activates the cat's eye camera module when no object is approaching during use, resulting in false capture, and frequent activation leads to high power consumption.

[0006] The utility model provides an alarm system for a smart lock, comprising:

[0007] A cat's eye camera module is provided on the smart lock;

[0008] A cat's eye power supply module, connected to the cat's eye camera module and provided on the smart lock, the cat's eye power supply module being used to supply power to the cat's eye power supply module to start the cat's eye camera module to take snapshots;

[0009] An infrared detection module for outputting a first detection signal when an object approaches, provided on the smart lock;

[0010] A microwave radar detection module for outputting a second detection signal when an object approaches, provided on the smart lock;

[0011] A control module is connected to the cat's eye power supply module, the infrared detection module and the microwave radar detection module. The control module is used to output a control signal to the cat's eye power supply module according to a first detection signal output by the infrared detection module and a second detection signal output by the microwave radar detection module, so that the cat's eye power supply module supplies power to the cat's eye camera module for capturing.

[0012] According to a further configuration of the present invention, the microwave radar detection module comprises:

[0013] A microwave radar sensor, wherein the first pin of the microwave radar sensor is connected to the first power supply end, the second pin of the microwave radar sensor is grounded, and the third, fourth and fifth pins of the microwave radar sensor are connected to the control module;

[0014] A first filtering unit connected to a connection path between the first pin of the microwave radar sensor and the first power supply end;

[0015] The first resistor is connected to the connection path between the fifth pin of the microwave radar sensor and the control module.

[0016] In a further configuration of the utility model, the cat's eye power supply module includes: a first chip, a second filtering unit, a third filtering unit, a first capacitor, a second capacitor, a first inductor, a second resistor and a third resistor;

[0017] One end of the first inductor is connected to the 6th pin of the first chip, the other end of the first inductor is connected to the cat's eye camera module, the second filtering unit is connected to the connection path between the other end of the first inductor and the cat's eye camera module, one end of the first capacitor is connected to the 6th pin of the first chip, the other end of the first capacitor is connected to the 1st pin of the first chip, one end of the second capacitor is connected to the other end of the first inductor, the other end of the second capacitor is connected to the 3rd pin of the first chip, one end of the second resistor is connected to one end of the second capacitor, the other end of the second resistor is connected to the other end of the second capacitor, one end of the third resistor is connected to the other end of the second resistor, the other end of the third resistor is grounded, the 2nd pin of the first chip is grounded, the 4th pin of the first chip is connected to the control module, the 5th pin of the first chip is connected to the second power supply end, and the third filtering unit is connected to the connection path between the 5th pin of the first chip and the second power supply end.

[0018] According to a further configuration of the present invention, the infrared detection module comprises:

[0019] A PIR sensor for outputting a detection signal when an object approaches, the PIR sensor comprising a first pin, a second pin and a third pin, the first pin of the PIR sensor being connected to a first power supply terminal, and the third pin of the PIR sensor being grounded;

[0020] A signal processing unit for receiving a detection signal and outputting a first detection signal, the signal processing unit comprising a first signal input end for receiving a detection signal and a first signal output end for outputting a first detection signal, the first signal input end of the signal processing unit being connected to the second pin of the PIR sensor, and the first signal output end of the signal processing unit being connected to the control module;

[0021] The fourth filtering unit is arranged on a connection path between the first power supply end and the first pin of the PIR sensor.

[0022] In a further configuration of the present invention, the signal processing unit comprises:

[0023] A signal amplifying subunit, the signal amplifying subunit comprising a first input end and a first output end for receiving a detection signal, the first input end being connected to the second pin of the PIR sensor;

[0024] A signal processing subunit, wherein the signal processing subunit comprises a second input terminal and a second output terminal for outputting a first detection signal, wherein the second input terminal is connected to the first output terminal, and the second output terminal is connected to the control module.

[0025] In a further configuration of the utility model, the signal amplification subunit includes: a first operational amplifier, a third capacitor, a fourth capacitor, a fifth capacitor, a sixth capacitor, a fourth resistor, a fifth resistor, a sixth resistor, a seventh resistor, a first diode, a second diode, a second operational amplifier, a seventh capacitor, an eighth capacitor, an eighth resistor, a ninth resistor, and a DC coupling subunit for coupling a DC signal;

[0026] The DC coupling subunit includes a third input terminal and a third output terminal;

[0027] One end of the third capacitor is grounded, the other end of the third capacitor is connected to one end of the fourth resistor, the other end of the fourth resistor is connected to the 6th pin of the first operational amplifier, the anode of the first diode, the cathode of the second diode, one end of the fourth capacitor and one end of the fifth resistor are connected to the connection path between the other end of the fourth resistor and the 6th pin of the first operational amplifier, the cathode of the first diode, the anode of the second diode, the other end of the fourth capacitor and the other end of the fifth resistor are connected to the 7th pin of the first operational amplifier, one end of the sixth resistor is connected to the 2nd pin of the PIR sensor, one end of the fifth capacitor and one end of the seventh resistor are connected to the connection path between one end of the sixth resistor and the 2nd pin of the PIR sensor, the other end of the sixth resistor and one end of the sixth capacitor are connected to the 5th pin of the first operational amplifier, the other end of the fifth capacitor, the other end of the seventh resistor and the other end of the sixth capacitor are grounded respectively, the 7th pin of the first operational amplifier is connected to the third input terminal of the DC coupling subunit, the 4th pin of the first operational amplifier is connected to the first power supply terminal, and the 11th pin of the first operational amplifier is grounded;

[0028] The 9th pin of the second operational amplifier is connected to the third output terminal of the DC coupling subunit, the 10th pin of the second operational amplifier is connected to the first reference voltage, one end of the seventh capacitor and one end of the eighth resistor are connected to the connection path between the 9th pin of the second operational amplifier and the third output terminal of the DC coupling subunit, the other end of the seventh capacitor and the other end of the eighth resistor are connected to the 8th pin of the second operational amplifier, one end of the eighth capacitor is connected to the 10th pin of the second operational amplifier, the other end of the eighth capacitor is grounded, one end of the ninth resistor is connected to the 8th pin of the second operational amplifier, the other end of the ninth resistor is connected to the 10th pin of the second operational amplifier, the 4th pin of the second operational amplifier is connected to the third power supply terminal, and the 11th pin of the second operational amplifier is grounded;

[0029] Among them, one end of the sixth resistor is the first input end of the signal amplifying subunit, and the other end of the ninth resistor is the first output end of the signal amplifying subunit.

[0030] In a further configuration of the utility model, the DC coupling subunit includes: a ninth capacitor and a tenth resistor, one end of the ninth capacitor being connected to one end of the tenth resistor;

[0031] The other end of the ninth capacitor is the third input end of the DC coupling subunit, and the other end of the tenth resistor is the third output end of the DC coupling subunit.

[0032] In a further configuration of the utility model, the signal processing subunit includes: a first comparator, a second comparator, an eleventh resistor, a twelfth resistor, a thirteenth resistor, a fourteenth resistor, a fifteenth resistor, a sixteenth resistor, a tenth capacitor, an eleventh capacitor, a twelfth capacitor, a third diode and a fourth diode;

[0033] One end of the eleventh resistor is connected to one end of the twelfth resistor, the other end of the twelfth resistor is connected to one end of the thirteenth resistor, the other end of the thirteenth resistor is connected to one end of the fourteenth resistor, the other end of the fourteenth resistor is grounded, and the other end of the eleventh resistor is connected to the first power supply end;

[0034] The second pin of the first comparator is connected to one end of the eleventh resistor and the twelfth resistor, one end of the tenth capacitor is connected to the second pin of the first comparator, the other end of the tenth capacitor is grounded, the first pin of the first comparator is connected to the anode of the third diode, the fourth pin of the first comparator is connected to the third power supply end, and the eleventh pin of the first comparator is grounded;

[0035] One end of the eleventh capacitor is connected to one end of the twelfth resistor connected to the thirteenth resistor, one end of the eleventh capacitor is also connected to the third pin of the first comparator and the thirteenth pin of the second comparator, the other end of the eleventh capacitor is grounded, one end of the fifteenth resistor is connected to the common end of the eleventh capacitor, the third pin of the first comparator and the thirteenth pin of the second comparator, and the other end of the fifteenth resistor is connected to the control module;

[0036] One end of the twelfth capacitor is connected to one end of the thirteenth resistor and the fourteenth resistor, and the other end of the twelfth capacitor is grounded;

[0037] The 12th pin of the second comparator is connected to one end of the twelfth resistor, the 14th pin of the second comparator is connected to the anode of the fourth diode, the 4th pin of the second comparator is connected to the first power supply end, and the 14th pin of the second comparator is grounded;

[0038] The cathode of the third diode is connected to the cathode of the fourth diode;

[0039] Among them, one end where the twelfth resistor is connected to the thirteenth resistor is the second input end of the signal processing subunit, and one end where the cathode of the third diode is connected to the cathode of the fourth diode is the second output end of the signal processing subunit.

[0040] In a further configuration of the utility model, the control module includes: a second chip, a fourteenth resistor, a fifteenth resistor, a sixteenth resistor, a seventeenth resistor, a thirteenth capacitor, a fourteenth capacitor, a second inductor and a fifth filtering unit;

[0041] The 18th, 19th and 20th pins of the second chip are connected to the microwave radar detection module, one end of the fourteenth resistor and one end of the fifteenth resistor are connected to the first power supply terminal, the other end of the fourteenth resistor is connected to the 20th pin of the second chip, the other end of the fifteenth resistor is connected to the 19th pin of the second chip, the 21st pin of the second chip is grounded, one end of the sixteenth resistor is connected to the first power supply terminal, the other end of the sixteenth resistor is connected to the 1st pin of the second chip, one end of the thirteenth capacitor is connected to the 1st pin of the second chip, the other end of the thirteenth capacitor is grounded, the 4th pin of the second chip is grounded, the 5th pin of the second chip is connected to one end of the fourteenth capacitor, and the other end of the fourteenth capacitor is grounded;

[0042] One end of the second inductor is connected to the first power supply end, the other end of the second inductor is connected to the sixth pin of the second chip, the fifth filtering unit is connected to the connection path between the other end of the second inductor and the sixth pin of the second chip, and the connection end of the fifth filtering unit and the other end of the second inductor and the sixth pin of the second chip is connected to the first power supply end;

[0043] The 12th pin of the second chip and the 13th pin of the second chip are respectively connected to the infrared detection module, the 11th pin of the second chip is connected to the cat's eye power supply module, one end of the seventeenth resistor is connected to the 11th pin of the second chip, and the other end of the seventeenth resistor is grounded.

[0044] The utility model also provides a smart lock, comprising: the alarm system for the smart lock as described above.

[0045] The utility model provides an alarm system for a smart lock and a smart lock, the alarm system for the smart lock comprising: a cat's eye camera module, arranged on the smart lock; a cat's eye power supply module, connected to the cat's eye camera module and arranged on the smart lock, the cat's eye power supply module being used to supply power to the cat's eye power supply module to start the cat's eye camera module for capturing; an infrared detection module for outputting a first detection signal when an object approaches, arranged on the smart lock; a microwave radar detection module for outputting a second detection signal when an object approaches, arranged on the smart lock; a control module, connected to the cat's eye power supply module, the infrared detection module and the microwave radar detection module, the control module being used to output a control signal to the cat's eye power supply module according to the first detection signal output by the infrared detection module and the second detection signal output by the microwave radar detection module, so that the cat's eye power supply module supplies power to the cat's eye camera module for capturing. In the technical solution of the utility model, when the cat's eye camera module is started, a control signal is output to the cat's eye power supply module through the control module, so that the cat's eye power supply module supplies power to the cat's eye camera module for capturing. Since the detection principles of the infrared detection module and the microwave radar detection module are different, the infrared detection module is required to output a first detection signal and the microwave radar detection module is required to output a second detection signal at the same time, thereby reducing the phenomenon of false capturing, that is, reducing the number of times the cat's eye camera module is started, thereby reducing power consumption. BRIEF DESCRIPTION OF THE DRAWINGS

[0046] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary personnel in this field, other drawings can be obtained based on the structures shown in these drawings without paying creative work.

[0047] Figure 1 It is a principle block diagram of the alarm system for the smart lock in the utility model.

[0048] Figure 2 It is a circuit structure diagram of a microwave radar detection module in one embodiment of the utility model.

[0049] Figure 3 It is a circuit structure diagram of a cat's eye power supply module in one embodiment of the utility model.

[0050] Figure 4 It is a circuit structure diagram of an infrared detection module in one embodiment of the utility model.

[0051] Figure 5 It is a circuit structure diagram of a control module in one embodiment of the utility model. DETAILED DESCRIPTION

[0052] In order to have a clearer understanding of the technical features, purposes and effects of the present invention, the specific implementation methods of the present invention are now described in detail with reference to the accompanying drawings. In the following description, it should be understood that the directions or positional relationships indicated by "front", "back", "up", "down", "left", "right", "longitudinal", "horizontal", "vertical", "horizontal", "top", "bottom", "inside", "outside", "head", "tail", etc. are based on the directions or positional relationships shown in the accompanying drawings, are constructed and operated in a specific direction, and are only for the convenience of describing the present technical solution, rather than indicating that the device or element referred to must have a specific direction, and therefore cannot be understood as a limitation to the present invention.

[0053] like Figure 1 , Figure 4 As shown, an alarm system for a smart lock provided by the utility model may include a cat's eye camera module 10, a cat's eye power supply module 20, an infrared detection module 30 and a microwave radar detection module 40.

[0054] Among them, the cat's eye camera module 10 is arranged on the smart lock, and the cat's eye camera module 10 is used to take snapshots when it is started; the cat's eye power supply module 20 is arranged on the smart lock and connected to the cat's eye camera module 10, and the cat's eye power supply module 20 is used to supply power to the cat's eye power supply module 20 to start the cat's eye camera module 10 for taking snapshots; the infrared detection module 30 is arranged on the smart lock, and the infrared detection module 30 is used to output a first detection signal when an object approaches; the microwave radar detection module 40 is arranged on the smart lock, and the microwave radar detection module 40 is used to output a second detection signal when an object approaches; the control module 50 is connected to the cat's eye power supply module 20, the infrared detection module 30 and the microwave radar detection module 40, and the control module 50 is used to output a control signal to the cat's eye power supply module 20 according to the first detection signal output by the infrared detection module 30 and the second detection signal output by the microwave radar detection module 40, so that the cat's eye power supply module 20 supplies power to the cat's eye camera module 10 for taking snapshots.

[0055] In the present embodiment, when the cat's eye camera module 10 is started, the control module 50 outputs a control signal to the cat's eye power supply module 20 according to the first detection signal and the second detection signal, so that the cat's eye power supply module 20 supplies power to the cat's eye camera module 10 for capturing. Since the detection principles of the infrared detection module 30 and the microwave radar detection module 40 are different, the infrared detection module 30 is required to output the first detection signal and the microwave radar detection module 40 simultaneously outputs the second detection signal, thereby reducing the phenomenon of false capturing, that is, reducing the number of times the cat's eye camera module 10 is started, improving the accuracy of capturing, improving safety, reducing power consumption, and extending the working time of the smart lock.

[0056] In some embodiments, Figure 2 As shown, the microwave radar detection module 40 may include a microwave radar sensor 402, a first filtering unit 401 and a first resistor R1; wherein the microwave radar sensor 402 is used to output a second detection signal when an object approaches, the first pin of the microwave radar sensor 402 is connected to the first power supply terminal VCC1, the second pin of the microwave radar sensor 402 is grounded, and the third, fourth and fifth pins of the microwave radar sensor 402 are connected to the control module 50; the first filtering unit 401 is connected to the connection path between the first pin of the microwave radar sensor 402 and the first power supply terminal VCC1; the first resistor R1 (the first resistor R1 is a pull-down resistor) is connected to the connection path between the fifth pin of the microwave radar sensor 402 and the control module 50.

[0057] In this embodiment, the microwave radar sensor 402 may be, but is not limited to, a sensor of model FR58L4LA.

[0058] Further, the first filtering unit 401 may include a capacitor filtering circuit composed of a fifteenth capacitor C15 and a sixteenth capacitor C16. Specifically, one end of the fifteenth capacitor C15 is connected in common with one end of the sixteenth capacitor C16, and the other end of the fifteenth capacitor C15 is connected in common with the other end of the sixteenth capacitor C16, wherein one common end of the fifteenth capacitor C15 and the sixteenth capacitor C16 is connected to the connection path between the first pin of the microwave radar sensor 402 and the first power supply terminal VCC1, and the other common end of the fifteenth capacitor C15 and the sixteenth capacitor C16 is grounded.

[0059] In this embodiment, the first filter unit 401 is configured to filter out interference signals in the voltage output from the first power supply terminal VCC1 to the first pin of the microwave radar sensor 402 .

[0060] In some embodiments, Figure 3 As shown, the cat's eye power supply module 20 may include a first chip U1, a second filtering unit 201, a third filtering unit 202, a first capacitor C1, a second capacitor C2, a first inductor L1, a second resistor R2 and a third resistor R3.

[0061] Among them, one end of the first inductor L1 is connected to the 6th pin of the first chip U1, and the other end of the first inductor L1 is connected to the cat's eye camera module 10. The second filtering unit 201 is connected to the connection path between the other end of the first inductor L1 and the cat's eye camera module 10, one end of the first capacitor C1 is connected to the 6th pin of the first chip U1, and the other end of the first capacitor C1 is connected to the 1st pin of the first chip U1, one end of the second capacitor C2 is connected to the other end of the first inductor L1, and the other end of the second capacitor C2 is connected to the 3rd pin of the first chip U1, one end of the second resistor R2 is connected to one end of the second capacitor C2, and the other end of the second resistor R2 is connected to the other end of the second capacitor C2, one end of the third resistor R3 is connected to the other end of the second resistor R2, and the other end of the third resistor R3 is grounded, the 2nd pin of the first chip U1 is grounded, the 4th pin of the first chip U1 is connected to the control module 50, the 5th pin of the first chip U1 is connected to the second power supply terminal VCC2, and the third filtering unit 202 is connected to the connection path between the 5th pin of the first chip U1 and the second power supply terminal VCC2.

[0062] In this embodiment, the first chip U1 may be a single-chip buck switching voltage regulator chip, and its model may be but is not limited to a JW5352M chip.

[0063] The second filter unit 201 may be a capacitor filter circuit composed of a seventeenth capacitor C17 and an eighteenth capacitor C18, and the details may refer to the first filter unit 401, which will not be described again. The third filter unit 202 may include a nineteenth capacitor C19, one end of which is connected to the connection between the fifth pin of the first chip U1 and the second power supply terminal VCC2, and the other end of the nineteenth capacitor C19 is grounded.

[0064] In the present embodiment, the second power supply terminal VCC2 is a battery (BATA) power supply terminal, and the end of the first inductor L1 connected to the cat's eye camera module 10 is a voltage output terminal to output voltage to the cat's eye camera module 10. When the cat's eye camera module 10 is started, the control module 50 outputs a high-level signal (control signal) according to the first detection signal and the second detection signal. At this time, the end of the first inductor L1 connected to the cat's eye camera module 10 outputs a voltage, and the cat's eye camera module 10 starts to capture; when the cat's eye camera module 10 is shut down, the control module 50 does not receive the first detection signal and / or the second detection signal, and the control module 50 outputs a low-level signal. At this time, the end of the first inductor L1 connected to the cat's eye camera module 10 has no voltage output, that is, the cat's eye camera module 10 is powered off and shut down.

[0065] In this embodiment, the end of the first inductor L1 connected to the cat's eye camera module 10 outputs 4V DC power. Of course, the control module 50 can also control the time of outputting the high-level signal to make the end of the first inductor L1 connected to the cat's eye camera module 10 output DC power of other values. Those skilled in the art can determine the time for the control module 50 to output the high-level signal according to the specific power supply requirements of the cat's eye camera module 10.

[0066] In some embodiments, Figure 4 As shown, the infrared detection module 30 may include a PIR sensor 301 , a signal processing unit 302 and a fourth filtering unit 303 .

[0067] Among them, the PIR sensor 301 includes a first pin, a second pin and a third pin, the second pin of the PIR sensor 301 is used to output a detection signal when an object approaches, the first pin of the PIR sensor 301 is connected to the first power supply terminal VCC1, and the third pin of the PIR sensor 301 is grounded; the signal processing unit 302 is used to access the detection signal and output the first detection signal, the signal processing unit 302 includes a first signal input terminal and a first signal output terminal, the first signal input terminal is used to access the detection signal, and the first signal output terminal is used to output the first detection signal, the first signal input terminal of the signal processing unit 302 is connected to the second pin of the PIR sensor 301, and the first signal output terminal of the signal processing unit 302 is connected to the control module 50; the fourth filtering unit 303 is connected to the connection path between the first power supply terminal VCC1 and the first pin of the PIR sensor 301.

[0068] In this embodiment, the PIR sensor 301 may be but is not limited to a sensor of model D203S, wherein the detection signal of the PIR sensor 301 is output to the signal processing unit 302, and the signal processing unit 302 processes the detection signal and outputs a first detection signal to the control module 50.

[0069] In this embodiment, the fourth filtering unit 303 is disposed on the connection path between the first power supply terminal VCC1 and the first pin of the PIR sensor 301 to filter out interference signals in the voltage signal output from the first power supply terminal VCC1 to the PIR sensor 301 .

[0070] In a specific embodiment, the fourth filtering unit 303 may include an eighteenth resistor R18, a twentieth capacitor C20, a twenty-first capacitor C21 and a twenty-second capacitor C22, wherein one end of the eighteenth resistor R18 is connected to the first power supply end VCC1, the other end of the eighteenth resistor R18 is connected to the first pin of the PIR sensor 301, one end of the twentieth capacitor C20, one end of the twenty-first capacitor C21 and one end of the twenty-second capacitor C22 are commonly connected to the connection path between the other end of the eighteenth resistor R18 and the first pin of the PIR sensor 301, and the other end of the twentieth capacitor C20, the other end of the twenty-first capacitor C21 and the other end of the twenty-second capacitor C22 are commonly grounded.

[0071] In some embodiments, Figure 4 As shown, the signal processing unit 302 may include a signal amplifying subunit 3021 and a signal processing subunit 3022; wherein, the signal amplifying subunit 3021 includes a first input terminal and a first output terminal, the first input terminal is used to receive the detection signal, and the first input terminal is connected to the second pin of the PIR sensor 301; the signal processing subunit 3022 includes a second input terminal and a second output terminal, the second input terminal is connected to the first output terminal, the second output terminal is connected to the control module 50, and the second output terminal is used to output the first detection signal.

[0072] In this embodiment, when outputting the first detection signal, the detection signal output by the PIR sensor 301 is amplified by the signal amplifying subunit 3021 to form an amplified signal output to the signal processing subunit 3022. The signal amplifying subunit 3021 processes the amplified signal and outputs the first detection signal.

[0073] Furthermore, if Figure 4 As shown, the signal amplifying subunit 3021 may include a first operational amplifier N1, a third capacitor C3, a fourth capacitor C4, a fifth capacitor C5, a sixth capacitor C6, a fourth resistor R4, a fifth resistor R5, a sixth resistor R6, a seventh resistor R7, a first diode D1, a second diode D2, a second operational amplifier N2, a seventh capacitor C7, an eighth capacitor C8, an eighth resistor R8, a ninth resistor R9 and a DC coupling subunit 3021a for coupling a DC signal.

[0074] The DC coupling subunit 3021a includes a third input terminal and a third output terminal; one end of the third capacitor C3 is grounded, the other end of the third capacitor C3 is connected to one end of the fourth resistor R4, the other end of the fourth resistor R4 is connected to the 6th pin of the first operational amplifier N1, the anode of the first diode D1, the cathode of the second diode D2, one end of the fourth capacitor C4 and one end of the fifth resistor R5 are connected to the connection path between the other end of the fourth resistor R4 and the 6th pin of the first operational amplifier N1, the cathode of the first diode D1, the anode of the second diode D2, The other end of the fourth capacitor C4 and the other end of the fifth resistor R5 are connected to the 7th pin of the first operational amplifier N1, one end of the sixth resistor R6 is connected to the 2nd pin of the PIR sensor 301, one end of the fifth capacitor C5 and one end of the seventh resistor R7 are connected to the connection path between one end of the sixth resistor R6 and the 2nd pin of the PIR sensor 301, the other end of the sixth resistor R6 and one end of the sixth capacitor C6 are connected to the 5th pin of the first operational amplifier N1, and the other end of the fifth capacitor C5, the other end of the seventh resistor R7 and the other end of the sixth capacitor C6 are connected to the 5th pin of the first operational amplifier N1. One end is grounded respectively, the 7th pin of the first operational amplifier N1 is connected to the third input end of the DC coupling subunit 3021a, the 4th pin of the first operational amplifier N1 is connected to the first power supply end VCC1, and the 11th pin of the first operational amplifier N1 is grounded; the 9th pin of the second operational amplifier N2 is connected to the third output end of the DC coupling subunit 3021a, the 10th pin of the second operational amplifier N2 is connected to the first reference voltage, one end of the seventh capacitor C7 and one end of the eighth resistor R8 are connected to the connection path between the 9th pin of the second operational amplifier N2 and the third output end of the DC coupling subunit 3021a, the other end of the seventh capacitor C7 and the other end of the eighth resistor R8 are connected to the 8th pin of the second operational amplifier N2, one end of the eighth capacitor C8 is connected to the 10th pin of the second operational amplifier N2, the other end of the eighth capacitor C8 is grounded, one end of the ninth resistor R9 is connected to the 8th pin of the second operational amplifier N2, and the other end of the ninth resistor R9 is connected to the 10th pin of the second operational amplifier N2; the fifth filtering unit 501 is connected to the connection path between the 10th pin of the second operational amplifier N2 and the first reference voltage.

[0075] In this embodiment, one end of the sixth resistor R6 is the first input end of the signal amplifying subunit 3021 , and the other end of the ninth resistor R9 is the first output end of the signal amplifying subunit 3021 .

[0076] In this embodiment, when amplifying the detection signal, two amplifications are performed. The first amplification is to amplify the detection signal through the first operational amplifier N1 to form an amplified signal, and the second amplification is to amplify the amplified signal output by the first operational amplifier N1 through the second operational amplifier N2 to form an amplified signal output to the signal sub-processing unit.

[0077] Specifically, the first operational amplifier N1, the third capacitor C3, the fourth resistor R4, the first diode D1, the second diode D2, the fourth capacitor C4, the fifth resistor R5, the fifth capacitor C5, the sixth resistor R6, the seventh resistor R7 and the sixth capacitor C6 form an amplifier circuit to amplify the detection signal output by the PIR sensor 301, wherein the fifth capacitor C5, the sixth resistor R6, the seventh resistor R7 and the sixth capacitor C6 filter out the interference signal in the detection signal output by the PIR sensor 301, and the first operational amplifier N1, the third capacitor C3, the fourth resistor R4, the first diode D1, the second diode D2, the fourth capacitor C4 and the fifth resistor R5 form an amplifier circuit with feedback to amplify the signal filtered by the fifth capacitor C5, the sixth resistor R6, the seventh resistor R7 and the sixth capacitor C6 to form an amplified signal (first amplification).

[0078] Thereafter, the amplified signal (first amplification) is output to another amplifying circuit composed of the second operational amplifier N2, the seventh capacitor C7, the eighth capacitor C8, the eighth resistor R8 and the ninth resistor R9 after passing through the DC coupling sub-unit 3021a, and the amplified signal (first amplification) is amplified again, wherein the DC coupling sub-unit 3021a couples the DC signal in the amplified signal (first amplification), the eighth capacitor C8 filters out the interference signal in the first reference voltage, the seventh capacitor C7, the eighth resistor R8, the ninth resistor R9 and the second operational amplifier N2 form another amplifying circuit with feedback, which amplifies the amplified signal coupled by the DC coupling sub-unit 3021a, and outputs the first detection signal from the end where the ninth resistor R9 is connected to the 10th pin of the second operational amplifier N2.

[0079] In some embodiments, Figure 4 As shown, the DC coupling subunit 3021a may include a ninth capacitor C9 and a tenth resistor R10, and one end of the ninth capacitor C9 is connected to one end of the tenth resistor R10; wherein the other end of the ninth capacitor C9 is the third input end of the DC coupling subunit 3021a, and the other end of the tenth resistor R10 is the third output end of the DC coupling subunit 3021a.

[0080] In this embodiment, the DC coupling sub-unit 3021a can couple a DC signal in the amplified signal output by the amplifier circuit composed of the first operational amplifier N1.

[0081] In some embodiments, Figure 4As shown, the signal processing subunit 3022 may include a first comparator N3, a second comparator N4, an eleventh resistor R11, a twelfth resistor R12, a thirteenth resistor R13, a fourteenth resistor R14, a fifteenth resistor R15, a sixteenth resistor R16, a tenth capacitor C10, an eleventh capacitor C11, a twelfth capacitor C12, a third diode D3 and a fourth diode D4.

[0082] Among them, one end of the eleventh resistor R11 is connected to one end of the twelfth resistor R12, the other end of the twelfth resistor R12 is connected to one end of the thirteenth resistor R13, the other end of the thirteenth resistor R13 is connected to one end of the fourteenth resistor R14, the other end of the fourteenth resistor R14 is grounded, and the other end of the eleventh resistor R11 is connected to the first power supply terminal VCC1; the second pin of the first comparator N3 is connected to one end connected to the eleventh resistor R11 and the twelfth resistor R12, one end of the tenth capacitor C10 is connected to the second pin of the first comparator N3, the other end of the tenth capacitor C10 is grounded, the first pin of the first comparator N3 is connected to the positive electrode of the third diode D3, the fourth pin of the first comparator N3 is connected to the third power supply terminal VCC3, and the eleventh pin of the first comparator N3 is grounded; one end of the eleventh capacitor C11 is connected to one end connected to the twelfth resistor R12 and the thirteenth resistor R13, one end of the eleventh capacitor C11 is also connected to the third pin of the first comparator N3 and the thirteenth pin of the second comparator N4, and the tenth The other end of the first capacitor C11 is grounded, one end of the fifteenth resistor R15 is connected to the common end of the eleventh capacitor C11, the third pin of the first comparator N3 and the thirteenth pin of the second comparator N4, and the other end of the fifteenth resistor R15 is connected to the control module 50; one end of the twelfth capacitor C12 is connected to one end of the thirteenth resistor R13 and the fourteenth resistor R14, and the other end of the twelfth capacitor C12 is grounded; the 12th pin of the second comparator N4 is connected to one end of the twelfth resistor, the 14th pin of the second comparator N4 is connected to the positive electrode of the fourth diode D4, the 4th pin of the second comparator N4 is connected to the first power supply terminal VCC1, and the 14th pin of the second comparator N4 is grounded; the cathode of the third diode D3 is connected to the cathode of the fourth diode D4; wherein, the end of the twelfth resistor R12 connected to the thirteenth resistor R13 is the second input end of the signal processing subunit 3022, and the end of the cathode of the third diode D3 connected to the cathode of the fourth diode D4 is the second output end of the signal processing subunit 3022.

[0083] In this embodiment, one end of the twelfth resistor R12 connected to the thirteenth resistor R13 is connected to one end of the ninth resistor R9 connected to the tenth pin of the second operational amplifier N2.

[0084] When specifically processing the amplified signal outputted by the ninth resistor R9, the amplified signal is an alternating positive and negative signal, wherein the amplified signal (second amplification) is transmitted to the inverting input terminal of the first comparator N3 via the twelfth resistor R12, and is transmitted to the non-inverting input terminal of the second comparator N4 via the thirteenth resistor. In addition, it is also transmitted to the control module 50 via the fifteenth resistor R15. When the amplified signal is a positive signal, the first pin of the first comparator N3 outputs a high-level signal, and the high-level signal outputted by the first pin of the first comparator N3 is outputted to the control module 50 via the third diode D3, that is, the first detection signal is outputted to the control module 50; when the amplified signal is a negative signal, the 14th pin of the second comparator N4 outputs a high-level signal, and the high-level signal outputted by the 14th pin of the second comparator N4 is outputted to the control module 50 via the fourth diode D4, that is, the first detection signal is outputted to the control module 50.

[0085] It can be seen that no matter whether the detection signal of the PIR sensor 301 is a positive signal or a negative signal, the signal processing subunit 3022 can output the first detection signal to the control module 50, thereby improving the detection accuracy; in addition, the amplified signal (second amplification) is also transmitted to the control module 50 via the fifteenth resistor R15. Since the intensity of the detection signal output by the PIR sensor 301 is related to the size of the object approaching the PIR sensor 301, and the time of the detection signal output by the PIR sensor 301 is related to the approach duration of the object approaching the PIR sensor 301, it can be seen that the size and duration of the object approaching the PIR sensor 301 can also be determined based on the intensity and duration of the amplified signal received by the control module 50 via the fifteenth resistor R15, thereby further improving the security of the smart lock.

[0086] In some embodiments, Figure 5 As shown, the control module 50 may include a second chip U2, a fourteenth resistor R14, a fifteenth resistor R15, a sixteenth resistor R16, a seventeenth resistor R17, a thirteenth capacitor C13, a fourteenth capacitor C14, a second inductor and a fifth filtering unit 501.

[0087] Among them, the 18th, 19th and 20th pins of the second chip U2 are connected to the microwave radar detection module 40, one end of the fourteenth resistor R14 and one end of the fifteenth resistor R15 are connected to the first power supply terminal VCC1, the other end of the fourteenth resistor R14 is connected to the 20th pin of the second chip U2, the other end of the fifteenth resistor R15 is connected to the 19th pin of the second chip U2, the 21st pin of the second chip U2 is grounded, one end of the sixteenth resistor R16 is connected to the first power supply terminal VCC1, the other end of the sixteenth resistor R16 is connected to the 1st pin of the second chip U2, one end of the thirteenth capacitor C13 is connected to the 1st pin of the second chip U2, the other end of the thirteenth capacitor C13 is grounded, the 4th pin of the second chip U2 is grounded, and the 5th pin of the second chip U2 is connected to the first pin of the second chip U2. One end of the fourteenth capacitor C14 is connected, and the other end of the fourteenth capacitor C14 is grounded; one end of the second inductor is connected to the first power supply terminal VCC1, and the other end of the second inductor is connected to the 6th pin of the second chip U2, the fifth filtering unit 501 is connected to the connection path between the other end of the second inductor and the 6th pin of the second chip U2, and the connection end of the fifth filtering unit 501 and the other end of the second inductor and the 6th pin of the second chip U2 is connected to the first power supply terminal VCC1; the 12th pin of the second chip U2 and the 13th pin of the second chip U2 are respectively connected to the infrared detection module 30, the 11th pin of the second chip U2 is connected to the cat's eye power supply module 20, one end of the seventeenth resistor R17 is connected to the 11th pin of the second chip U2, and the other end of the seventeenth resistor R17 is grounded.

[0088] In this embodiment, the second chip U2 may be, but is not limited to, a chip of model CX32L003F8Q6T.

[0089] Specifically, pin 18 of the second chip U2 is connected to pin 5 of the microwave radar sensor 402, pin 19 of the second chip U2 is connected to pin 4 of the microwave radar sensor 402, pin 20 of the second chip U2 is connected to pin 3 of the microwave radar sensor 402, pin 13 of the second chip U2 is connected to the other end of the fifteenth resistor R15, pin 12 of the second chip U2 is connected to the common terminal of the third diode D3 and the fourth diode D4, and pin 11 of the second chip U2 is connected to pin 4 of the first chip U1.

[0090] In this embodiment, the fifth filtering unit 501 may include a twenty-third capacitor C23 and a twenty-fourth capacitor C24, wherein one end of the twenty-third capacitor C23 and one end of the twenty-fourth capacitor C24 are commonly connected to the connection path between the other end of the second inductor and the sixth pin of the second chip U2, and the other end of the twenty-third capacitor C23 and the other end of the twenty-fourth capacitor C24 are commonly grounded. The setting of the twenty-third capacitor C23 and the twenty-fourth capacitor C24 filters out the interference signal in the voltage output to the sixth pin of the second chip U2.

[0091] In this embodiment, the alarm system can be debugged through pins 14, 15 and 3 of the second chip U2 to ensure that the alarm system can work normally when applied to the smart lock.

[0092] In some embodiments, Figure 1 , Figure 3 As shown, the first power supply terminal VCC1 can be but not limited to +3.3V DC, the second power supply terminal VCC2 is the power supply terminal of the battery, and the third power supply terminal VCC3 can be the power supply terminal of a low-dropout linear regulator 60 (LDO, LowDropout Regulator). The input terminal of the low-dropout linear regulator 60 is connected to the third power supply terminal VCC3 (battery), and the input terminal of the low-dropout linear regulator 60 outputs +3.3V DC.

[0093] In some embodiments, the cat's eye camera module 10 may be any module capable of realizing the above functions, which will not be elaborated herein.

[0094] In some embodiments, the utility model also provides a smart lock, which applies the alarm system for the smart lock as described above.

[0095] When the alarm system is specifically applied to a smart lock, the alarm system integrated with the PIR sensor 301 and the microwave radar sensor 402 is installed on the smart lock and on the front of the smart lock. During installation, attention should be paid to the detection range of the PIR sensor 301 and the microwave radar sensor 402 (which can cover an alarm range, and the alarm range is that when an object is considered to have entered, the cat's eye module in the alarm system on the smart lock will be activated). In this embodiment, the detection range of the PIR sensor 301 and the microwave radar sensor 402 can cover a 180-degree range; thereafter, the working mode of the PIR sensor 301 and the microwave radar sensor 402 is set. In order to improve the detection accuracy, the working mode of the PIR sensor 301 and the microwave radar sensor 402 can be set to a continuous detection mode, that is, the PIR sensor 301 and the microwave radar sensor 402 perform detection continuously. Once a signal (the first detection signal and / or the second detection signal) is detected, the detected signal will be immediately transmitted to the first detection signal. The second chip U2 controls the first chip U1 to start the cat's eye camera module 10 for capturing pictures according to the first detection signal and the second detection signal. When the PIR sensor 301 detects an object (the second chip U2 receives the first detection signal) and the microwave radar sensor 402 does not detect the object (the second chip U2 does not receive the second detection signal), the cat's eye camera module 10 is shut down; or, when the PIR sensor 301 does not detect an object (the second chip U2 does not receive the first detection signal) and the microwave radar sensor 402 detects an object (the second chip U2 receives the second detection signal), the cat's eye camera module 10 is shut down; or, when the PIR sensor 301 detects an object (the second chip U2 receives the first detection signal) and the microwave radar sensor 402 detects an object (the second chip U2 receives the second detection signal), but the detection result of the PIR sensor 301 is inconsistent with the detection result of the microwave radar sensor 402, the cat's eye camera module 10 is shut down.

[0096] It can be seen that when the smart lock using the above-mentioned alarm system for smart locks starts the cat's eye camera module 10, the control module 50 outputs a control signal to the cat's eye power supply module 20 according to the first detection signal and the second detection signal to control the start and stop of the cat's eye camera module 10. Since the detection principles of the infrared detection module 30 and the microwave radar detection module 40 are different, the infrared detection module 30 is required to output the first detection signal and the microwave radar detection module 40 is required to output the second detection signal at the same time to reduce the phenomenon of false capture, that is, the number of times the cat's eye camera module 10 is started is reduced, thereby reducing power consumption.

[0097] Here, it should be pointed out that the description of the above smart lock embodiment is similar to the description of the above alarm system embodiment for smart locks, and has similar beneficial effects as the above alarm system for smart locks. For technical details not disclosed in the smart lock embodiment of this embodiment, please refer to the description of the alarm system embodiment for smart locks of the utility model for understanding.

[0098] In summary, the utility model provides an alarm system for a smart lock and a smart lock, which have the following effects:

[0099] When the cat's eye camera module 10 is started, the control module 50 outputs a control signal to the cat's eye power supply module 20 according to the first detection signal and the second detection signal, so that the cat's eye power supply module 20 supplies power to the cat's eye camera module 10 for capturing. Since the detection principles of the infrared detection module 30 and the microwave radar detection module 40 are different, the infrared detection module 30 is required to output the first detection signal and the microwave radar detection module 40 is required to output the second detection signal at the same time, so as to reduce the phenomenon of false capturing, that is, the number of times the cat's eye camera module 10 is started is reduced, thereby reducing power consumption.

[0100] It can be understood that the above embodiments only express the preferred implementation methods of the utility model, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the patent scope of the utility model. It should be pointed out that, for ordinary technicians in this field, without departing from the concept of the utility model, the above-mentioned technical features can be freely combined, and several deformations and improvements can be made, which all belong to the protection scope of the utility model. Therefore, all equivalent changes and modifications made to the scope of the claims of the utility model should belong to the scope covered by the claims of the utility model.

Claims

1. An alarm system for a smart lock, characterized in that: include: A cat's eye camera module is provided on the smart lock; A cat's eye power supply module, connected to the cat's eye camera module and provided on the smart lock, the cat's eye power supply module being used to supply power to the cat's eye power supply module to start the cat's eye camera module to take snapshots; An infrared detection module for outputting a first detection signal when an object approaches, provided on the smart lock; A microwave radar detection module for outputting a second detection signal when an object approaches, provided on the smart lock; A control module is connected to the cat's eye power supply module, the infrared detection module and the microwave radar detection module. The control module is used to output a control signal to the cat's eye power supply module according to a first detection signal output by the infrared detection module and a second detection signal output by the microwave radar detection module, so that the cat's eye power supply module supplies power to the cat's eye camera module for capturing.

2. The alarm system for smart locks according to claim 1, characterized in that: The microwave radar detection module comprises: A microwave radar sensor, wherein the first pin of the microwave radar sensor is connected to the first power supply end, the second pin of the microwave radar sensor is grounded, and the third, fourth and fifth pins of the microwave radar sensor are connected to the control module; A first filtering unit connected to a connection path between the first pin of the microwave radar sensor and the first power supply end; The first resistor is connected to the connection path between the fifth pin of the microwave radar sensor and the control module.

3. The alarm system for smart locks according to claim 1, characterized in that: The cat's eye power supply module includes: a first chip, a second filtering unit, a third filtering unit, a first capacitor, a second capacitor, a first inductor, a second resistor and a third resistor; One end of the first inductor is connected to the 6th pin of the first chip, the other end of the first inductor is connected to the cat's eye camera module, the second filtering unit is connected to the connection path between the other end of the first inductor and the cat's eye camera module, one end of the first capacitor is connected to the 6th pin of the first chip, the other end of the first capacitor is connected to the 1st pin of the first chip, one end of the second capacitor is connected to the other end of the first inductor, the other end of the second capacitor is connected to the 3rd pin of the first chip, one end of the second resistor is connected to one end of the second capacitor, the other end of the second resistor is connected to the other end of the second capacitor, one end of the third resistor is connected to the other end of the second resistor, the other end of the third resistor is grounded, the 2nd pin of the first chip is grounded, the 4th pin of the first chip is connected to the control module, the 5th pin of the first chip is connected to the second power supply end, and the third filtering unit is connected to the connection path between the 5th pin of the first chip and the second power supply end.

4. The alarm system for smart locks according to claim 1, characterized in that: The infrared detection module comprises: A PIR sensor for outputting a detection signal when an object approaches, the PIR sensor comprising a first pin, a second pin and a third pin, the first pin of the PIR sensor being connected to a first power supply terminal, and the third pin of the PIR sensor being grounded; A signal processing unit for receiving a detection signal and outputting a first detection signal, the signal processing unit comprising a first signal input end for receiving a detection signal and a first signal output end for outputting a first detection signal, the first signal input end of the signal processing unit being connected to the second pin of the PIR sensor, and the first signal output end of the signal processing unit being connected to the control module; The fourth filtering unit is arranged on a connection path between the first power supply end and the first pin of the PIR sensor.

5. The alarm system for smart locks according to claim 4, characterized in that: The signal processing unit comprises: A signal amplifying subunit, the signal amplifying subunit comprising a first input end and a first output end for receiving a detection signal, the first input end being connected to the second pin of the PIR sensor; A signal processing subunit, wherein the signal processing subunit comprises a second input terminal and a second output terminal for outputting a first detection signal, wherein the second input terminal is connected to the first output terminal, and the second output terminal is connected to the control module.

6. The alarm system for smart locks according to claim 5, characterized in that: The signal amplification subunit includes: a first operational amplifier, a third capacitor, a fourth capacitor, a fifth capacitor, a sixth capacitor, a fourth resistor, a fifth resistor, a sixth resistor, a seventh resistor, a first diode, a second diode, a second operational amplifier, a seventh capacitor, an eighth capacitor, an eighth resistor, a ninth resistor, and a DC coupling subunit for coupling a DC signal; The DC coupling subunit includes a third input terminal and a third output terminal; One end of the third capacitor is grounded, the other end of the third capacitor is connected to one end of the fourth resistor, the other end of the fourth resistor is connected to the 6th pin of the first operational amplifier, the anode of the first diode, the cathode of the second diode, one end of the fourth capacitor and one end of the fifth resistor are connected to the connection path between the other end of the fourth resistor and the 6th pin of the first operational amplifier, the cathode of the first diode, the anode of the second diode, the other end of the fourth capacitor and the other end of the fifth resistor are connected to the 7th pin of the first operational amplifier, one end of the sixth resistor is connected to the 2nd pin of the PIR sensor, one end of the fifth capacitor and one end of the seventh resistor are connected to the connection path between one end of the sixth resistor and the 2nd pin of the PIR sensor, the other end of the sixth resistor and one end of the sixth capacitor are connected to the 5th pin of the first operational amplifier, the other end of the fifth capacitor, the other end of the seventh resistor and the other end of the sixth capacitor are grounded respectively, the 7th pin of the first operational amplifier is connected to the third input terminal of the DC coupling subunit, the 4th pin of the first operational amplifier is connected to the first power supply terminal, and the 11th pin of the first operational amplifier is grounded; The 9th pin of the second operational amplifier is connected to the third output terminal of the DC coupling subunit, the 10th pin of the second operational amplifier is connected to the first reference voltage, one end of the seventh capacitor and one end of the eighth resistor are connected to the connection path between the 9th pin of the second operational amplifier and the third output terminal of the DC coupling subunit, the other end of the seventh capacitor and the other end of the eighth resistor are connected to the 8th pin of the second operational amplifier, one end of the eighth capacitor is connected to the 10th pin of the second operational amplifier, the other end of the eighth capacitor is grounded, one end of the ninth resistor is connected to the 8th pin of the second operational amplifier, the other end of the ninth resistor is connected to the 10th pin of the second operational amplifier, the 4th pin of the second operational amplifier is connected to the third power supply terminal, and the 11th pin of the second operational amplifier is grounded; Among them, one end of the sixth resistor is the first input end of the signal amplifying subunit, and the other end of the ninth resistor is the first output end of the signal amplifying subunit.

7. The alarm system for smart locks according to claim 6, characterized in that: The DC coupling subunit includes: a ninth capacitor and a tenth resistor, one end of the ninth capacitor is connected to one end of the tenth resistor; The other end of the ninth capacitor is the third input end of the DC coupling subunit, and the other end of the tenth resistor is the third output end of the DC coupling subunit.

8. The alarm system for smart locks according to any one of claims 5 to 7, characterized in that: The signal processing subunit includes: a first comparator, a second comparator, an eleventh resistor, a twelfth resistor, a thirteenth resistor, a fourteenth resistor, a fifteenth resistor, a sixteenth resistor, a tenth capacitor, an eleventh capacitor, a twelfth capacitor, a third diode and a fourth diode; One end of the eleventh resistor is connected to one end of the twelfth resistor, the other end of the twelfth resistor is connected to one end of the thirteenth resistor, the other end of the thirteenth resistor is connected to one end of the fourteenth resistor, the other end of the fourteenth resistor is grounded, and the other end of the eleventh resistor is connected to the first power supply end; The second pin of the first comparator is connected to one end of the eleventh resistor and the twelfth resistor, one end of the tenth capacitor is connected to the second pin of the first comparator, the other end of the tenth capacitor is grounded, the first pin of the first comparator is connected to the anode of the third diode, the fourth pin of the first comparator is connected to the third power supply end, and the eleventh pin of the first comparator is grounded; One end of the eleventh capacitor is connected to one end of the twelfth resistor connected to the thirteenth resistor, one end of the eleventh capacitor is also connected to the third pin of the first comparator and the thirteenth pin of the second comparator, the other end of the eleventh capacitor is grounded, one end of the fifteenth resistor is connected to the common end of the eleventh capacitor, the third pin of the first comparator and the thirteenth pin of the second comparator, and the other end of the fifteenth resistor is connected to the control module; One end of the twelfth capacitor is connected to one end of the thirteenth resistor and the fourteenth resistor, and the other end of the twelfth capacitor is grounded; The 12th pin of the second comparator is connected to one end of the twelfth resistor, the 14th pin of the second comparator is connected to the anode of the fourth diode, the 4th pin of the second comparator is connected to the first power supply end, and the 14th pin of the second comparator is grounded; The cathode of the third diode is connected to the cathode of the fourth diode; Among them, one end where the twelfth resistor is connected to the thirteenth resistor is the second input end of the signal processing subunit, and one end where the cathode of the third diode is connected to the cathode of the fourth diode is the second output end of the signal processing subunit.

9. The alarm system for smart locks according to claim 1, characterized in that: The control module includes: a second chip, a fourteenth resistor, a fifteenth resistor, a sixteenth resistor, a seventeenth resistor, a thirteenth capacitor, a fourteenth capacitor, a second inductor and a fifth filtering unit; The 18th, 19th and 20th pins of the second chip are connected to the microwave radar detection module, one end of the fourteenth resistor and one end of the fifteenth resistor are connected to the first power supply terminal, the other end of the fourteenth resistor is connected to the 20th pin of the second chip, the other end of the fifteenth resistor is connected to the 19th pin of the second chip, the 21st pin of the second chip is grounded, one end of the sixteenth resistor is connected to the first power supply terminal, the other end of the sixteenth resistor is connected to the 1st pin of the second chip, one end of the thirteenth capacitor is connected to the 1st pin of the second chip, the other end of the thirteenth capacitor is grounded, the 4th pin of the second chip is grounded, the 5th pin of the second chip is connected to one end of the fourteenth capacitor, and the other end of the fourteenth capacitor is grounded; One end of the second inductor is connected to the first power supply end, the other end of the second inductor is connected to the sixth pin of the second chip, the fifth filtering unit is connected to the connection path between the other end of the second inductor and the sixth pin of the second chip, and the connection end of the fifth filtering unit and the other end of the second inductor and the sixth pin of the second chip is connected to the first power supply end; The 12th pin of the second chip and the 13th pin of the second chip are respectively connected to the infrared detection module, the 11th pin of the second chip is connected to the cat's eye power supply module, one end of the seventeenth resistor is connected to the 11th pin of the second chip, and the other end of the seventeenth resistor is grounded.

10. A smart lock, characterized in that: include: An alarm system for a smart lock as described in any one of claims 1 to 9.

Images