Circuit with fall-off detection function and watch

Abstract

The utility model provides a circuit with a falling-off detection function and a watch. The circuit comprises a main control processing module, a first sensor module, a second sensor module, an alarm module and a power supply module used for supplying power. The main control processing module is respectively connected with the power supply module, the alarm module, the one or more first sensor modules and the one or more second sensor modules; the first sensor module is used for collecting a motion state, and the second sensor module is used for collecting temperature information and / or light information; the main control processing module is used for obtaining the motion information collected by the first sensor module and the temperature information and / or the light information collected by the second sensor module, and determining whether to control the alarm module to give an alarm or not. According to the circuit with the falling-off detection function and the watch provided by the invention, an alarm can be given out in time when the falling-off of the watch is detected, the accuracy of a detection result is improved, and errors are avoided to a certain extent.

Description

Technical Field

[0001] This application relates to the field of watch technology, and in particular to a circuit and watch with a detachment detection function. Background Technology

[0002] When a watch is worn on the wrist, if it is not worn securely or if you are not used to checking its condition frequently, the watch may accidentally fall off. Activities such as exercise and housework may also cause the watch to be subjected to external forces, leading to its loss or being left behind.

[0003] In the existing technology, some watches with detachment detection functions exist to address the above situation. However, most of these watches are slow to react and cannot promptly indicate that the watch has fallen off. Some watches, although sensitive, are prone to false alarms.

[0004] Therefore, a solution is needed to address at least one of the above problems. Utility Model Content

[0005] In view of at least one of the defects in the prior art, this application proposes a circuit and a watch with a detachment detection function.

[0006] The technical solution adopted by this application to solve at least one of the above-mentioned technical problems is as follows:

[0007] A circuit with a detachment detection function includes: a main control processing module, a first sensor module, a second sensor module, an alarm module, and a power supply module for power supply.

[0008] The main control processing module is connected to the power module, the alarm module, one or more first sensor modules and one or more second sensor modules respectively;

[0009] The first sensor module is used to collect motion state, and the second sensor module is used to collect temperature information and / or light information;

[0010] The main control processing module is used to acquire motion information collected by the first sensor module and temperature and / or light information collected by the second sensor module, and to determine whether to control the alarm module to issue a warning.

[0011] In one specific embodiment, it further includes: a wireless communication module;

[0012] The wireless communication module is connected to the main control processing module.

[0013] In one specific embodiment, it further includes: a positioning module;

[0014] The positioning module is connected to both the main control processing module and the wireless communication module.

[0015] In one specific embodiment, the first sensor module includes: an acceleration sensor chip;

[0016] The acceleration sensor chip is connected to the power module through a filter circuit, and is also connected to the main control processing module through an interface circuit and an interrupt signal circuit.

[0017] In one specific embodiment, the second sensor module includes: a temperature sensor element; one end of the temperature sensor element is connected to the power supply module, the other end of the temperature sensor element is connected to a first voltage divider resistor, the voltage divider node of the temperature sensor element is connected to the main control processing module through a filter, and the first voltage divider resistor is grounded;

[0018] And / or, the second sensor module includes: a light sensor element;

[0019] One end of the optical sensor element is connected to the power supply module, and the other end of the optical sensor element is connected to the second voltage divider resistor. The voltage divider node of the optical sensor element is connected to the main control processing module through an operational amplifier circuit, and the second voltage divider resistor is grounded.

[0020] In one specific embodiment, the power supply module includes a first voltage regulator circuit and a second voltage regulator circuit;

[0021] The input terminal of the first voltage regulator circuit is connected to the power supply, and the output terminal of the first voltage regulator circuit is connected to the main control processing module, which is used to provide the main control processing module with electrical energy that has undergone the first voltage regulation process.

[0022] The input terminal of the second voltage regulator circuit is connected to the first voltage regulator circuit, and the output terminal of the second voltage regulator circuit is connected to the first sensor module, the second sensor module, and the alarm module to provide electrical energy that has undergone a second voltage regulation process.

[0023] In one specific embodiment, a display module is also included;

[0024] The display module is connected to the main control processing module and the power supply module respectively.

[0025] In one specific embodiment, the alarm module includes one or more of a visual warning unit, an auditory warning unit, and a tactile warning unit that are respectively connected to the main control processing module.

[0026] A watch with a detachment detection function includes a circuit with a detachment detection function as described in any of the claims in the first part.

[0027] In one specific embodiment, it also includes a watch body and a watch strap;

[0028] At least one first sensor module is disposed near the central area of ​​the watch body, and at least one second sensor module is disposed near the side of the watch body or the watch strap that contacts the user's skin.

[0029] Beneficial effects:

[0030] This application provides a circuit and watch with a drop detection function, which can issue an alarm in time when the watch is detected to have fallen off, and improves the accuracy of the detection results, thus avoiding errors to a certain extent. Specifically, a first sensor module is provided to collect motion state, and a second sensor module is provided to collect temperature information and / or light information. The main control processing module integrates the collected motion information, temperature information and / or light information to determine whether the watch has fallen off. Attached Figure Description

[0031] To more clearly illustrate the technical solutions of the embodiments of this application, the accompanying drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this application and should not be regarded as a limitation of the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0032] Figure 1 This is a schematic diagram of the circuit composition with detachment detection function in this embodiment. Figure 1 ;

[0033] Figure 2 This is a schematic diagram of the circuit composition with detachment detection function in this embodiment. Figure 2 ;

[0034] Figure 3 This is a schematic diagram of the first sensor module in this embodiment;

[0035] Figure 4 This is a schematic diagram of the second sensor module in this embodiment. Figure 1 ;

[0036] Figure 5 This is a schematic diagram of the second sensor module in this embodiment. Figure 2 ;

[0037] Figure 6 This is a three-dimensional structural diagram of the watch with detachment detection function in this embodiment;

[0038] Figure 7 This is a diagram of the internal structure of the watch with a detachment detection function in this embodiment.

[0039] Figure label:

[0040] 1-Main control processing module; 2-First sensor module; 3-Second sensor module; 4-Alarm module; 5-Power supply module; 6-Wireless communication module; 7-Positioning module; 8-Display module; 91-Watch body; 92-Watch strap. Detailed Implementation

[0041] Various embodiments of this disclosure will be described more fully below. This disclosure may have various embodiments, and adjustments and changes may be made therein. However, it should be understood that there is no intention to limit the various embodiments of this disclosure to the specific embodiments disclosed herein, but rather this disclosure should be understood to cover all adjustments, equivalents, and / or alternatives falling within the spirit and scope of the various embodiments of this disclosure.

[0042] In the following, the terms “comprising” or “may include”, which may be used in various embodiments of this disclosure, indicate the presence of the disclosed functions, operations, or elements, and do not limit the addition of one or more functions, operations, or elements. Furthermore, as used in various embodiments of this disclosure, the terms “comprising,” “having,” and their cognates are intended only to indicate a particular feature, number, step, operation, element, component, or combination of the foregoing, and should not be construed as primarily excluding the presence of one or more other features, numbers, steps, operations, elements, components, or combinations of the foregoing, or the possibility of adding one or more combinations of the foregoing.

[0043] In various embodiments of this disclosure, the expression "or" or "at least one of A and / or B" includes any combination or all combinations of the words listed simultaneously. For example, the expression "A or B" or "at least one of A and / or B" may include A, may include B, or may include both A and B.

[0044] The terms used in the various embodiments of this disclosure (such as "first," "second," etc.) may modify various components in the various embodiments, but do not limit the corresponding components. For example, the above terms do not limit the order and / or importance of the components. The above terms are only used for the purpose of distinguishing one component from others. For example, a first user device and a second user device refer to different user devices, although both are user devices. For example, a first component may be referred to as a second component without departing from the scope of the various embodiments of this disclosure, and similarly, a second component may also be referred to as a first component.

[0045] It should be noted that if a description is made of "connecting" one component to another, then the first component can be directly connected to the second component, and a third component can be "connected" between the first and second components. Conversely, when a component is "directly connected" to another component, it can be understood that there is no third component between the first and second components.

[0046] The term "user" as used in various embodiments of this disclosure may refer to a person using an electronic device or a device using an electronic device (e.g., an artificial intelligence electronic device).

[0047] The terminology used in the various embodiments of this disclosure is for the purpose of describing particular embodiments only and is not intended to limit the various embodiments of this disclosure. As used herein, the singular form is intended to include the plural form as well, unless the context clearly indicates otherwise. Unless otherwise defined, all terms used herein (including technical and scientific terms) have the same meaning as commonly understood by one of ordinary skill in the art to which the various embodiments of this disclosure pertain. Terms (such as those defined in a generally used dictionary) are to be interpreted as having the same meaning as in the context of the relevant technical field and are not to be interpreted as having an idealized or overly formal meaning, unless clearly defined in the various embodiments of this disclosure.

[0048] Example

[0049] This application provides a circuit with a detachment detection function, such as... Figure 1 As shown, it includes: a main control processing module 1, a first sensor module 2, a second sensor module 3, an alarm module 4, and a power supply module 5 for power supply;

[0050] Specifically, in some embodiments of this application, the main control processing module 1 can adopt a single MCU (Microcontroller Unit) solution, or a SoC (System on Chip) solution, or a dual-core solution combining SoC and MCU;

[0051] Of course, no restrictions are placed on the construction scheme of the main control processing module 1.

[0052] For example, the main control processing module 1 can use an STM32L4 processing chip, which has low power consumption and supports ADC, I / O, etc. 2 It has interfaces such as C, SPI, and USB, which can be directly connected to sensors;

[0053] As another example, the main control processing module 1 can also use the ATS3085 processing chip, which has a high degree of integration, integrates an MCU+DSP dual-core architecture, supports sports and health algorithms, Bluetooth calls, graphics acceleration (2D GPU), and can also realize functions such as display driving, audio decoding, and Bluetooth music push to headphones.

[0054] Of course, there are no restrictions on the specific model of the main control processing module 1 chip, as long as it meets the main control processing requirements of this solution.

[0055] The main control processing module 1 is connected to the power module 5, the alarm module 4, one or more first sensor modules 2 and one or more second sensor modules 3 respectively;

[0056] The first sensor module 2 is used to collect motion state, and the second sensor module 3 is used to collect temperature information and / or light information;

[0057] Optionally, the first sensor module 2 can be implemented by one or any combination of an accelerometer, a gyroscope, or an inertial measurement unit;

[0058] For example, in some embodiments of this application, the accelerometer may use a chip of model ADXL345 or BMI270, the gyroscope may use a chip of model MPU6050 or BMG250, and the inertial measurement unit may use a chip of model MPU9250 or ICM-42688-P.

[0059] Optionally, the second sensor module 3 can be implemented using a temperature sensor or a light sensor;

[0060] For example, in some embodiments of this application, the temperature sensor of the second sensor module 3 can be a Minyuan MY1601 or MLX90632 chip, and the light sensor can be a WH4535V chip or a TSL2584TSV chip.

[0061] Of course, no restrictions are placed on the specific implementation of the first sensor module 2 and the second sensor module 3.

[0062] The main control processing module 1 is used to acquire motion information collected by the first sensor module 2 and temperature and / or light information collected by the second sensor module 3, and to determine whether to control the alarm module 4 to issue a warning.

[0063] Understandably, through the cooperation of the first sensor module 2 and the second sensor module 3, the fusion of multi-sensor data is realized, integrating different types of sensor information to comprehensively analyze the watch status. When it is determined that the watch has fallen off, the alarm module 4 can be controlled to issue a warning.

[0064] For example, the first sensor module 2 can detect changes in acceleration of electronic devices such as watches. When a watch falls off or when a user makes a large movement, the first sensor module 2 can detect it. Based on this, the light or temperature change information detected by the second sensor module 3 assists the main control processing module 1 in its judgment. Only when the information collected by the first sensor module 2 and the second sensor module 3 both match the state of the electronic device falling off will the alarm module 4 be triggered, thus improving the accuracy of the alarm for the fall of electronic devices such as watches.

[0065] For example, in some embodiments of this application, when the first sensor module 2 detects a sudden change in the acceleration of the device, but the second sensor module 3 does not detect a sudden change in temperature or light, the alarm module 4 is not triggered; similarly, when the second sensor module 3 detects a sudden change in temperature or light, but the first sensor module 2 does not detect a sudden change in the acceleration of the device, the alarm module 4 is also not triggered.

[0066] Furthermore, such as Figure 2 As shown, it also includes: wireless communication module 6;

[0067] The wireless communication module 6 is connected to the main control processing module 1.

[0068] The wireless communication module 6 can use Bluetooth communication technology, Wi-Fi communication technology, cellular network technology or NFC (Near Field Communication) technology;

[0069] Of course, no specific restrictions are placed on the communication technology of the wireless communication module 6.

[0070] Understandably, the wireless communication module 6 can transmit the data from the main control processing module 1 to the remote monitoring platform in real time. Users can remotely view the sensor status, alarm status, or system operation status at any time via mobile phone, computer, or other devices. When the main control processing module 1 detects that the device has fallen off, it can send relevant information to the system backend through the wireless communication module 6 to facilitate timely understanding of the time and location of the device's fall.

[0071] Furthermore, such as Figure 2 As shown, it also includes: a positioning module 7 for locating the device position;

[0072] The positioning module 7 is connected to the main control processing module 1 and the wireless communication module 6 respectively.

[0073] For example, the positioning module 7 can locate the device through satellite positioning systems such as GPS and Beidou, or it can achieve assisted positioning through A-GPS, Wi-Fi positioning or Bluetooth beacons.

[0074] Of course, no restrictions are placed on the positioning technology of positioning module 7.

[0075] Understandably, the main control processing module 1 can also process the location information returned by the positioning module 7 and convert the location data into an appropriate format for processing and storage. For example, when the positioning module 7 uses GPS positioning technology, the main control processing module 1 processes the obtained latitude and longitude information and transmits it to the wireless communication module 6. The wireless communication module 6 is responsible for transmitting the processed location information to a remote device or cloud server via wireless communication.

[0076] The positioning module 7 can provide real-time device location, allowing the system to know the device's exact location at any time. When devices such as watches are lost or detached, the positioning module 7 can easily obtain the device's location information, thus helping to retrieve the device.

[0077] Furthermore, such as Figure 3 As shown, the first sensor module 2 includes: an acceleration sensor chip;

[0078] The acceleration sensor chip is connected to the power module 5 through a filter circuit, and is also connected to the main control processing module 1 through an interface circuit and an interrupt signal circuit.

[0079] Specifically, in some embodiments of this application, the accelerometer chip may be an ADI ADXL345 or a Bosch BMA400.

[0080] Optionally, a low-pass filter or a band-pass filter can be set in the filtering circuit;

[0081] Specifically, in some embodiments of this application, the filtering circuit is provided with a low-pass filter and the cutoff frequency is set to 10Hz or 50Hz; the voltage output by the power module 5 is 3.3V or 5V; the terminal threshold of the interrupt signal circuit can be set to an acceleration exceeding 2g and an interrupt response time of 10ms to 100ms.

[0082] Understandably, the interrupt signal circuit can promptly notify the main control processing module 1 to respond when the accelerometer detects a specific motion, such as a sudden fall or violent shaking, thereby reducing reaction time and improving the timeliness of signal processing by the main control processing module 1.

[0083] Furthermore, such as Figure 4 As shown, the second sensor module 3 includes: a temperature sensor element;

[0084] One end of the temperature sensor element is connected to the power module 5, and the other end of the temperature sensor element is connected to the first voltage divider resistor. The voltage divider node of the temperature sensor element is connected to the main control processing module 1 through a filter, and the first voltage divider resistor is grounded.

[0085] Exemplary examples, in some embodiments of this application, the temperature sensor element may be an NTC thermistor or a digital temperature sensor;

[0086] More specifically, in some embodiments of this application, the NTC thermistor can be an NTC10K, with a resistance of approximately 10kΩ at room temperature, which decreases as the temperature increases; the digital temperature sensor can be a DS18B20, which has a built-in ADC converter and communicates with the main control processing module 1 via a 1-wire protocol, simplifying the circuit design; the first voltage divider resistor is used to adjust the sensor's output voltage according to temperature changes, and its commonly used resistance is 10kΩ, forming a voltage divider circuit with the NTC thermistor; the filter is a low-pass filter used to remove high-frequency noise, and its parameters can be a cutoff frequency of 10Hz or 50Hz.

[0087] And / or, such as Figure 5 As shown, the second sensor module 3 includes: a light sensor element;

[0088] One end of the optical sensor element is connected to the power module 5, and the other end of the optical sensor element is connected to the second voltage divider resistor. The voltage divider node of the optical sensor element is connected to the main control processing module 1 through the operational amplifier circuit, and the second voltage divider resistor is grounded.

[0089] For example, in some embodiments of this application, the optical sensor element may be a photodiode, a photoresistor, or an optical sensor chip;

[0090] Specifically, in some embodiments of this application, the light sensor element is an LDR photoresistor, whose resistance value changes with the ambient light intensity, with a lower resistance value when the light is strong and a higher resistance value when the light is dark; the second voltage divider resistor adapts to the change of the LDR photoresistor, with a resistance value of 10kΩ, and forms a voltage divider circuit with the LDR photoresistor to convert the light signal into a voltage signal that can be read by the main control processing module 1; the operational amplifier circuit is used to amplify the signal, and is equipped with an LM358 operational amplifier to amplify the voltage signal obtained from the voltage divider resistor to a suitable range so that the main control processing module 1 can receive it.

[0091] Grounding improves the circuit's anti-interference capability, thereby enhancing power supply stability and effectively reducing circuit noise.

[0092] Furthermore, the power module 5 includes a first voltage regulator circuit and a second voltage regulator circuit;

[0093] The input terminal of the first voltage regulator circuit is connected to the power supply, and the output terminal of the first voltage regulator circuit is connected to the main control processing module 1, which is used to provide the main control processing module 1 with electrical energy that has undergone the first voltage regulation process.

[0094] The input terminal of the second voltage regulator circuit is connected to the first voltage regulator circuit, and the output terminal of the second voltage regulator circuit is connected to the first sensor module 2, the second sensor module 3, and the alarm module 4 to provide electrical energy that has undergone the second voltage regulation process.

[0095] Specifically, in some embodiments of this application, the first voltage regulator circuit and the second voltage regulator circuit may each include one or any multiple of a voltage regulator chip, a capacitor, a resistor, a diode, and an inductor.

[0096] For example, the voltage regulator chip can be an LM7805 with an input voltage of 7V to 35V and an output voltage of 5V.

[0097] Furthermore, such as Figure 2 As shown, it also includes a display module 8;

[0098] The display module 8 is connected to the main control processing module 1 and the power supply module 5 respectively.

[0099] For example, the display module 8 can be a liquid crystal display, an organic light-emitting diode display, or a thin film transistor display;

[0100] Of course, there are no restrictions on the choice of display screen for display module 8.

[0101] Understandably, the display module 8 can be used to show the user the operating status of the circuit system, such as battery level, sensor data, alarm status, and device operating mode; through intuitive display, users can understand the system's working status in a timely manner. The display also serves as the main interface for user interaction with the circuit system, allowing users to view system operating information, configuration parameters, or status updates, and even perform some operation settings via the touchscreen. In the event of an anomaly or alarm, the display module 8 will alert the user through text, icons, or color changes.

[0102] Furthermore, the alarm module 4 includes one or more of a visual warning unit, an auditory warning unit, and a tactile warning unit that are respectively connected to the main control processing module 1.

[0103] For example, a visual warning unit can be implemented by setting LED lights or indicator lights, an auditory warning unit can be implemented by setting a buzzer or speaker, and a tactile warning unit can be implemented by a vibration motor.

[0104] Of course, there are no restrictions on the specific implementation methods of visual warning units, auditory warning units, and tactile warning units.

[0105] Understandably, by combining visual, auditory, and tactile alert units, the alarm module 4 can simultaneously deliver warning or reminder information through multiple sensory channels, which helps to enhance the recognizability of alerts, thereby improving the effectiveness of alerts and the user's responsiveness, and thus to some extent preventing the loss of equipment.

[0106] This application also provides a watch with a detachment detection function, including a circuit with a detachment detection function according to any one of the first parts.

[0107] Furthermore, such as Figure 6 and Figure 7 As shown, the watch also includes a watch body 91 and a watch strap 92;

[0108] At least one first sensor module 2 is located near the center area of ​​the watch body 91, and at least one second sensor module 3 is located near the side of the watch body 91 or the watch strap 92 that contacts the user's skin.

[0109] Understandably, the first sensor module 2 is placed in the central area of ​​the watch case of the watch body 91. The central area of ​​the watch body 91 can reflect the movement characteristics of the watch to the greatest extent and reduce deviation, so that the first sensor module 2 can stably and effectively detect the movement and vibration signals of the watch.

[0110] In addition, the connection point of the watch strap 92 is also subjected to considerable pressure. The first sensor module 2 can also be set at the connection point of the watch strap 92 to detect changes in the watch's status in a timely manner when the watch strap 92 becomes loose and separates from the wrist.

[0111] The second sensor module 3 is positioned close to the side of the watch body 91 or the strap 92 that contacts the user's skin. It is used to detect changes in temperature and light on the wrist side, providing more accurate detection results and reducing the influence of the external environment on the detection results of the second sensor module 3, thereby improving detection accuracy and assisting in determining whether the watch has fallen off.

[0112] The embodiments of this application have at least the following beneficial effects:

[0113] This application provides a circuit and watch with a drop detection function, which can issue an alarm in time when the watch is detected to have fallen off, and improves the accuracy of the detection results, thus avoiding errors to a certain extent. Specifically, a first sensor module 2 is provided to collect motion state, and a second sensor module 3 is provided to collect temperature information and / or light information. The main control processing module 1 integrates the collected motion information, temperature information and / or light information to determine whether the watch has fallen off.

[0114] Those skilled in the art will understand that the accompanying drawings are merely schematic diagrams of a preferred embodiment, and the modules or processes shown in the drawings are not necessarily essential for implementing this application.

[0115] Those skilled in the art will understand that the modules in the apparatus of the implementation scenario can be distributed within the apparatus of the implementation scenario as described, or they can be located in one or more apparatuses different from this implementation scenario, with corresponding changes. The modules of the above-described implementation scenario can be combined into one module, or they can be further divided into multiple sub-modules.

[0116] The serial numbers in this application are for descriptive purposes only and do not represent the superiority or inferiority of the implementation scenario.

[0117] The above disclosures are only a few specific implementation scenarios of this application. However, this application is not limited to these. Any variations that can be conceived by those skilled in the art should fall within the protection scope of this application.

Claims

1. A circuit having a function of detecting a falling-off, characterized by comprising: The application relates to a circuit with a fall detection function. The application comprises a main control processing module, a first sensor module, a second sensor module, an alarm module and a power module for power supply. The main control processing module is connected with the power module, the alarm module, one or more first sensor modules and one or more second sensor modules. The first sensor module is used for collecting motion state, and the second sensor module is used for collecting temperature information and / or light information. The main control processing module is used for acquiring the motion information collected by the first sensor module and the temperature information and / or light information collected by the second sensor module, and determining whether to control the alarm module to issue a warning.

2. The circuit with a falling-off detection function according to claim 1, characterized in that, The application further comprises a wireless communication module. The wireless communication module is connected with the main control processing module. The application further comprises a positioning module.

3. The circuit with a detachment detection function according to claim 2, characterized in that, The positioning module is connected with the main control processing module and the wireless communication module. The first sensor module comprises an acceleration sensor chip. The acceleration sensor chip is connected with the power module through a filter circuit, and is connected with the main control processing module through an interface circuit and an interrupt signal circuit.

4. The circuit with a detachment detection function according to claim 1, characterized in that, The second sensor module comprises a temperature sensor element. One end of the temperature sensor element is connected with the power module, the other end of the temperature sensor element is connected with a first voltage dividing resistor, a voltage dividing node of the temperature sensor element is connected with the main control processing module through a filter, and the first voltage dividing resistor is grounded.

5. The circuit having a detachment detection function according to claim 1, characterized by The second sensor module can further comprise a light sensor element. One end of the light sensor element is connected with the power module, the other end of the light sensor element is connected with a second voltage dividing resistor, a voltage dividing node of the light sensor element is connected with the main control processing module through an operational amplifier circuit, and the second voltage dividing resistor is grounded. The power module comprises a first voltage stabilizing circuit and a second voltage stabilizing circuit.

6. The circuit having a detachment detection function according to claim 1, characterized by An input end of the first voltage stabilizing circuit is connected with a power source, and an output end of the first voltage stabilizing circuit is connected with the main control processing module, so as to provide first voltage stabilizing processed power for the main control processing module. An input end of the second voltage stabilizing circuit is connected with the first voltage stabilizing circuit, and an output end of the second voltage stabilizing circuit is connected with the first sensor module, the second sensor module and the alarm module, so as to provide second voltage stabilizing processed power. The application further comprises a display screen module.

7. The circuit having a detachment detection function according to claim 1, characterized by The display screen module is connected with the main control processing module and the power module. The alarm module comprises one or any multiple of a visual warning unit, an audible warning unit and a tactile warning unit connected with the main control processing module.

8. The circuit having a detachment detection function according to claim 1, characterized by The application comprises the circuit with the fall detection function as claimed in any one of claims 1 to 8.

9. A wristwatch having a function of detecting a falling-off, characterized by comprising: The application further comprises a watch main body and a watch band.

10. The watch with a function of detecting a falling-off according to claim 9, wherein At least one first sensor module is arranged close to a central area of the watch main body, and at least one second sensor module is arranged close to a side of the watch main body or the watch band which contacts the skin of a user. ​

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