Static electricity removing intelligent bracelet

Abstract

The utility model provides a kind of static electricity removal intelligent bracelet, including intelligent bracelet body, processing module, power module and heart rate measurement module are equipped in intelligent bracelet body, bracelet contact is equipped on bracelet body, heart rate measurement module is connected with processing module communication, there is also impedance acquisition and static electricity release circuit on bracelet body, impedance acquisition module is connected with power module and first static electricity release circuit, processing module;Heart rate measurement module is connected with second static electricity release circuit;Bracelet contact is connected with impedance acquisition module.By being equipped with first static electricity release circuit in human impedance acquisition, second static electricity release circuit is connected on heart rate measurement module, so that this intelligent bracelet can release static electricity in real time when collecting heart rate and human impedance through bracelet contact, avoid the problem that static electricity is introduced into the internal device of intelligent bracelet through bracelet contact when collecting heart rate and impedance, to avoid the problem that the electronic components in bracelet can be damaged.

Description

Technical Field

[0001] This utility model relates to the field of smart bracelet technology, and in particular to an anti-static smart bracelet. Background Technology

[0002] In the electronics industry, many electronic components are static electricity sensitive, and failure to properly protect against static electricity can easily lead to component damage and product failures that are extremely difficult to repair. Therefore, operators are required to wear anti-static wrist straps to prevent damage to components caused by static electricity. The traditional method is to test the anti-static wrist strap with an anti-static tester before starting work. However, traditional anti-static wrist straps are usually connected to a ground wire to eliminate static electricity, and cannot monitor whether the operator is working. Operators may remove the wrist strap for comfort reasons without noticing, which may result in static electricity not being eliminated and damaging components on the production line. To address this, wrist straps with human body monitoring functions have emerged on the market, introducing smart wrist straps that measure wear (detect human body impedance) and heart rate to detect whether the wrist strap is being worn. However, this common approach does not effectively integrate static electricity elimination, impedance measurement, and heart rate monitoring. Static electricity elimination and human body monitoring work separately. Since the production environment of electronic production lines is different from ordinary living environments, static electricity is more likely to be generated, which may affect the accuracy of the heart rate measurement module or even damage it. Utility Model Content

[0003] To address the aforementioned problems, the purpose of this invention is to provide an antistatic smart bracelet.

[0004] This utility model is implemented using the following method: an anti-static smart bracelet, comprising a smart bracelet body, wherein the smart bracelet body is provided with a processing module, a power module, and a heart rate measurement module, the processing module and the heart rate measurement module are connected to the power module, the bracelet body is provided with bracelet contacts, the heart rate measurement module is communicatively connected to the processing module, the heart rate measurement module is connected to the bracelet contacts, the bracelet body also has an impedance acquisition and electrostatic discharge circuit, the impedance acquisition and electrostatic discharge circuit includes an impedance acquisition module and a first electrostatic discharge circuit, the impedance acquisition module is connected to the power module and the first electrostatic discharge circuit, the impedance acquisition module is also communicatively connected to the processing module; the heart rate measurement module is connected to a second electrostatic discharge circuit; the bracelet contacts are connected to the impedance acquisition module.

[0005] Preferably, the wristband contacts include a watchband metal and a bottom case metal ring; the first electrostatic discharge circuit includes a transient voltage suppressor (TVS2) and a resistor (R38), one end of which is connected to the watchband metal, and the other end of which is connected to ground; the impedance acquisition module includes a follower (U8), the third pin of which is connected to the watchband metal, the fifth pin of which is connected to the power module, and the first pin of which is connected to the processing module to transmit an impedance signal; the bottom case metal contacts are connected to the heart rate measurement module for measuring heart rate; and the second electrostatic discharge circuit includes a transient voltage suppressor (TVS1), which is connected to the bottom case metal contacts.

[0006] Preferably, a power filter module is also connected between the power module and the follower U8. The power filter module includes an inductor FB3 connected to the output terminal of the power module, the other end of the inductor FB3 connected to the fifth pin of the follower U8, and one end of a capacitor C55 connected to the other end of the capacitor C55 grounded, and outputs VCC_EM to power the follower U8.

[0007] Preferably, the fifth pin of the follower U8 is also connected to one end of the capacitor C56, and the other end of the capacitor C56 is grounded; the fourth pin of the follower U8 is connected to the first pin, and the second pin of the follower U8 is grounded.

[0008] Preferably, the impedance acquisition module further includes a voltage divider module, which includes a resistor R21 and a capacitor C57. The resistor R21 is connected between the metal band and the third pin of the follower U8. One end of the capacitor C57 is connected to the metal band, and the other end of the capacitor C57 is connected to ground.

[0009] Preferably, the wristband has pins TP59, TP60, TP61 and TP62 on its strap. Pins TP59, TP60, TP61 and TP62 are connected to the metal of the strap, the transient voltage suppressor TVS2 and the resistor R38, and are grounded through the transient voltage suppressor TVS2 and the resistor R38.

[0010] Preferably, the heart rate measurement module includes a heart rate acquisition sensor U10 and a connecting circuit board. Pin TP50 of the connecting circuit board is connected to the metal ring on the bottom shell. Pin T51 of the connecting circuit board is connected to VCC_EM. Pin T51 is also connected to one end of a transient voltage suppressor TVS1, and the other end of the transient voltage suppressor TVS1 is connected to ground. The first pin of the heart rate acquisition sensor U10 is connected to the power supply module.

[0011] Preferably, a resistor R35 is also connected between pin TP51 ​​of the connecting circuit board and the other end of the inductor FB3, and one end of the transient voltage suppressor TVS1 is connected to the end of the resistor R35 connected to VCC_EM.

[0012] Preferably, the eighth pin of the heart rate sensor U10 is connected to pin TP35 of the connecting circuit board, the second pin of the heart rate sensor U10 is connected to pin TP36 of the connecting circuit board, the seventh pin of the heart rate sensor U10 is connected to pin TP37 of the connecting circuit board, and pins T40, T41, and T42 of the connecting circuit board are connected to the corresponding pins of the processing module.

[0013] Preferably, the smart bracelet body also includes a display module, a memory, an accelerometer, a wireless communication module, and a vibration module. The vibration module, the display module, the memory, the wireless communication module, and the accelerometer are electrically connected to the power module. The vibration module, the display module, the memory, the wireless communication module, and the accelerometer are communicatively connected to the processing module. The wireless communication module can be connected to an external host computer.

[0014] The beneficial effects of this utility model are as follows: This utility model provides an anti-static smart bracelet. Compared with the prior art, this utility model has at least the following technical effects: 1. By setting a first electrostatic discharge circuit for human body impedance acquisition and connecting a second electrostatic discharge circuit to the heart rate measurement module, the smart bracelet can release static electricity to ground in real time when acquiring heart rate and human body impedance through the bracelet contacts. This avoids the problem of introducing static electricity into the smart bracelet through the bracelet contacts during heart rate and impedance acquisition, thereby avoiding the potential damage to the electronic components inside the bracelet. 2. The metal band (impedance acquisition and first electrostatic discharge) is separated from the metal ring on the bottom case (heart rate measurement and second electrostatic discharge) to avoid signal crosstalk; resistors R38, TVS2 (band), and TVS1 (bottom case) provide electrostatic protection for the impedance acquisition module and heart rate module respectively, which is more targeted and improves the anti-static capability of each module (for example, the heart rate module acquires data through the bottom case contacts, and TVS1 directly discharges the static electricity in its path, protecting the heart rate sensor U10; the impedance acquisition module acquires data through the metal band, and resistors R38 and TVS2 discharge the static electricity in this path, providing 4kV ESD protection and protecting the operational amplifier); the impedance acquisition circuit, through the operational amplifier (U8, OPA313IDBVT): forms a voltage follower to improve the input impedance, accurately acquire weak signals, and reduce the output impedance to enhance the driving capability and stably transmit to the ADC_body (analog-to-digital conversion interface). 3. A power supply filtering module is included, with inductor FB3 and capacitor C55 forming an LC filter circuit to filter the power supply before powering the follower U8, ensuring a clean power supply for U8 and mitigating interference from power supply noise in the production line environment, thus improving impedance measurement accuracy. 4. Capacitor C56 further filters VCC_EM (power supply terminal), and in conjunction with the pin connection of follower U8 (pin 4 shorted to pin 1, forming a typical voltage follower structure), ensures signal buffering (high input impedance, low output impedance), improving the stability of impedance signal transmission. For example, even in the complex electromagnetic environment of a production line, it can accurately acquire human body impedance (e.g., 1kΩ~10MΩ range), providing reliable data for subsequent BIA (volume composition analysis) algorithms. 5. Resistors R21 (voltage divider), R38 (grounding resistor), and capacitor C57 (filter) form a voltage divider module to preprocess the signal from the metal band. R38 (1MΩ) and human body impedance (1kΩ~10MΩ) form a reasonable voltage divider. The device converts human body impedance into a measurable voltage, adapting to the input range of the U8 follower. C57 filters out high-frequency noise (such as electrostatic discharge spikes), ensuring a clean signal to the follower and improving the anti-interference capability of impedance measurement (for high-static environments on production lines). 6. The four pins of the watch band (TP59-TP62) are directly connected to ground, providing multiple electrostatic discharge paths and improving electrostatic discharge efficiency.For example, during production line operations, static electricity from the operator's body can be quickly conducted to ground through the multi-pin connector on the wristband, preventing static electricity buildup inside the wristband. 7. The metal ring on the bottom shell connects to the heart rate sensor U10 and is simultaneously grounded through TVS1 (the second electrostatic discharge circuit), directly discharging static electricity from the heart rate acquisition path (such as static electricity from the operator touching the bottom shell), protecting the heart rate sensor (such as HRS3300, U10 in the preceding diagram) from electrostatic damage. 8. TVS1 is connected in parallel between VCC_EM and GND_EARTH to directly discharge electrostatic energy, resist surge interference, and ensure the stability of the subsequent heart rate sensor; resistor R35 can be used as a calibration resistor (such as for calibrating the voltage of VCC_EM). Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the principle of an antistatic smart bracelet according to this utility model.

[0016] Figure 2 This is a circuit diagram of the impedance acquisition and electrostatic discharge circuit of this utility model.

[0017] Figure 3 This is the circuit diagram of the heart rate measurement module of this utility model.

[0018] Figure 4 This is a circuit block diagram of the power module part of this utility model.

[0019] Figure 5 This is the circuit schematic diagram of the processing module of this utility model.

[0020] Figure 6 This is a circuit diagram of the display module of this utility model.

[0021] Figure 7 This is the circuit schematic diagram of the memory of this utility model.

[0022] Figure 8 This is a circuit diagram of the acceleration sensor of this utility model.

[0023] Figure 9 This is a circuit diagram of the wireless communication module of this utility model.

[0024] Figure 10 This is the circuit diagram of the vibration module of this utility model.

[0025] Figure 11 This is the circuit diagram of the touch sensing module of this utility model.

[0026] The following are the diagram labels: 1. Processing module; 2. Power supply module; 3. Heart rate measurement module; 4. Wristband contact; 5. Impedance acquisition and electrostatic discharge circuit; 6. Display module; 7. Memory; 8. Accelerometer; 9. Wireless communication module; 10. Vibration module; 11. Touch sensing module. Detailed Implementation

[0027] The present invention will be further described below with reference to the accompanying drawings and specific embodiments.

[0028] Please see Figures 1 to 11 An anti-static smart bracelet includes a smart bracelet body, which houses a processing module 1, a power module 2, and a heart rate measurement module 3. The processing module 1 and the heart rate measurement module 3 are connected to the power module 2. The bracelet body has bracelet contacts 4. The heart rate measurement module 3 is communicatively connected to the processing module 1 and to the bracelet contacts 4. The bracelet body also has an impedance acquisition and electrostatic discharge circuit 5, which includes an impedance acquisition module and a first electrostatic discharge circuit. The impedance acquisition module is connected to the power module 2 and the first electrostatic discharge circuit, and is also communicatively connected to the processing module 1. The heart rate measurement module 3 is connected to a second electrostatic discharge circuit. The bracelet contacts 4 are connected to the impedance acquisition module. By incorporating a first electrostatic discharge circuit for human body impedance acquisition and connecting a second electrostatic discharge circuit to the heart rate measurement module 3, the smart bracelet can discharge static electricity to ground in real time when acquiring heart rate and human body impedance through the bracelet contact 4. This avoids the problem of static electricity being introduced into the smart bracelet's internal components through the bracelet contact 4 during heart rate and impedance acquisition, thus preventing potential damage to the electronic components inside the bracelet. The processing module 1 can use a Cortex-M3 processor CC1312R1F3RGZT; the heart rate measurement module 3 can use an HRS3300; and the power module 2 can consist of an MP2661GC-0000 chip with charging management path selection and a polymer lithium battery.

[0029] Please see Figures 1 to 3Preferably, the wristband contact 4 includes a watchband metal and a bottom case metal ring; the first electrostatic discharge circuit includes a transient voltage suppressor (TVS2) and a resistor (R38), one end of which is connected to the watchband metal, and the other end of which is connected to ground; the impedance acquisition module includes a follower (U8), the third pin of which is connected to the watchband metal, the fifth pin of which is connected to the power module 2, and the first pin of which is connected to the processing module 1 to transmit an impedance signal; the bottom case metal contact is connected to the heart rate measurement module 3 for measuring heart rate; the second electrostatic discharge circuit includes a transient voltage suppressor (TVS1), which is connected to the bottom case metal contact. The metal band (impedance acquisition and first electrostatic discharge) is separated from the metal ring on the bottom case (heart rate measurement and second electrostatic discharge) to avoid signal crosstalk; resistors R38, TVS2 (band), and TVS1 (bottom case) provide electrostatic protection for the impedance acquisition module and heart rate module respectively, which is more targeted and improves the anti-static capability of each module (for example, the heart rate module acquires data through the bottom case contacts, and TVS1 directly discharges the static electricity in its path, protecting the heart rate sensor U10; the impedance acquisition module acquires data through the metal band, and resistors R38 and TVS2 discharge the static electricity in this path, providing 4kV ESD protection and protecting the operational amplifier); the impedance acquisition circuit, through the operational amplifier (U8, OPA313IDBVT): forms a voltage follower to improve the input impedance, accurately acquire weak signals, and reduce the output impedance to enhance the driving capability and stably transmit to the ADC_body (analog-to-digital conversion interface).

[0030] Please see Figures 1 to 2 Preferably, a power filter module is also connected between the power module 2 and the follower U8. The power filter module includes an inductor FB3 connected to the output terminal of the power module 2, the other end of the inductor FB3 connected to the fifth pin of the follower U8, and one end connected to a capacitor C55. The other end of the capacitor C55 is grounded, and the output VCC_EM supplies power to the follower U8. The power filter module, with its inductor FB3 and capacitor C55 forming an LC filter circuit, filters the power supply before supplying power to the follower U8, ensuring a clean power supply to the follower U8, resolving the interference of power supply noise on impedance signal acquisition in the production line environment, and improving impedance measurement accuracy.

[0031] Please see Figures 1 to 2Preferably, the fifth pin of the follower U8 is also connected to one end of capacitor C56, and the other end of capacitor C56 is grounded; the fourth pin of the follower U8 is connected to the first pin, and the second pin of the follower U8 is grounded. Capacitor C56 further filters VCC_EM (power supply terminal), and in conjunction with the pin connections of the follower U8 (the fourth pin is shorted to the first pin, forming a typical structure of a voltage follower), ensures signal buffering effect (high input impedance, low output impedance), and improves the transmission stability of impedance signals. For example, in the complex electromagnetic environment of a production line, it can still accurately collect human body impedance (e.g., in the range of 1kΩ~10MΩ), providing reliable data for subsequent BIA (body composition analysis) algorithms.

[0032] Please see Figures 1 to 2 Preferably, the impedance acquisition module further includes a voltage divider module, which includes a resistor R21 and a capacitor C57. The resistor R21 is connected between the metal part of the watchband and the third pin of the follower U8; one end of the capacitor C57 is connected to the metal part of the watchband, and the other end of the capacitor C57 is connected to ground. The voltage divider module, consisting of resistor R21 (voltage divider), R38 (grounding resistor), and capacitor C57 (filter), preprocesses the signal from the metal part of the watchband. R38 (1MΩ) forms a reasonable voltage divider with the human body impedance (1kΩ~10MΩ), ensuring that the circuit can accurately acquire signals within a wide impedance range (such as changes in skin impedance when the operator wears the watchband), adapting to different operators (dry / wet skin, tightness of the watchband, etc.). The human body impedance is converted into a measurable voltage, adapting to the input range of the follower U8; C57 filters out high-frequency noise (such as spike interference from electrostatic discharge), ensuring the purity of the signal input to the follower and improving the anti-interference capability of impedance measurement (for high electrostatic environments on production lines).

[0033] Please see Figures 1 to 2 Preferably, the wristband has pins TP59, TP60, TP61, and TP62 on its strap. Pins TP59, TP60, TP61, and TP62 are connected to the strap metal, a transient voltage suppressor (TVS2), and a resistor R38, and are grounded via the TVS2 and R38. The four pins (TP59-TP62) grounded provide multiple electrostatic discharge paths, improving electrostatic discharge efficiency. For example, during production line operations, static electricity from the operator's body can be quickly conducted to ground through the multiple pins on the strap, preventing static electricity buildup inside the wristband.

[0034] Please see Figures 1 to 3Preferably, the heart rate measurement module 3 includes a heart rate sensor U10 and a connecting circuit board. Pin TP50 of the connecting circuit board is connected to the metal ring on the bottom shell, and pin T51 of the connecting circuit board is connected to VCC_EM. Pin T51 is also connected to one end of a transient voltage suppressor (TVS1), and the other end of the TVS1 is connected to ground. The first pin of the heart rate sensor U10 is connected to the power module 2. The metal ring on the bottom shell connects to the heart rate sensor U10 and is grounded through TVS1 (the second electrostatic discharge circuit), directly dissipating static electricity in the heart rate acquisition path (such as static electricity when an operator touches the bottom shell), protecting the heart rate sensor U10 HRS3300 from electrostatic damage.

[0035] Please see Figures 1 to 3 Preferably, a resistor R35 is connected between pin TP51 ​​of the connecting circuit board and the other end of the inductor FB3. One end of the transient voltage suppressor TVS1 is connected to the end of the resistor R35 connected to VCC_EM. The transient voltage suppressor TVS1 is connected in parallel between VCC_EM and GND_EARTH to directly discharge electrostatic energy, resist surge interference, and ensure the stability of the subsequent heart rate sensor. Resistor R35 can be used as a debugging resistor (such as for calibrating the voltage of VCC_EM). The metal ring of the bottom shell of the bracelet is connected to resistor R35 and transient voltage suppressor TVS1 after pins TP50 and TP51, and then grounded. VCC_EM is connected to 3.3V, and a voltage is applied to the human skin through pins T51 and TP50 via R35, and the other end is connected to TP59, forming a loop. This allows detection to determine whether someone is wearing the bracelet.

[0036] Please see Figures 1 to 3 Preferably, the eighth pin of the heart rate sensor U10 is connected to pin TP35 of the connecting circuit board, the second pin of the heart rate sensor U10 is connected to pin TP36 of the connecting circuit board, and the seventh pin of the heart rate sensor U10 is connected to pin TP37 of the connecting circuit board. Pins T40, T41, and T42 of the connecting circuit board are connected to the corresponding pins of the processing module 1. The pins (SCL, SDA, INT, etc.) of the heart rate sensor U10 correspond one-to-one with the pins (TP35-TP37, T40-T42) of the connecting circuit board, conforming to the I2C communication standard (I2C_SCL, I2C_SDA of the processing module 1), ensuring stable communication with the processing module 1 (such as CC1310 / CC1312). For example, the INT pin (TP37) serves as an interrupt signal to notify the processing module 1 to read heart rate data in real time, improving system response speed (such as real-time heart rate monitoring during production line operations to assist in judging operator fatigue).

[0037] Please see Figures 1 to 3 Preferably, the smart bracelet body also includes a display module 6, a memory 7, an accelerometer 8, a wireless communication module 9, and a vibration module 10. The vibration module 10, the display module 6, the memory 7, the wireless communication module 9, and the accelerometer 8 are electrically connected to the power module 2. The vibration module 10, the display module 6, the memory 7, the wireless communication module 9, and the accelerometer 8 are communicatively connected to the processing module 1. The wireless communication module 9 can connect to an external host computer. These are all existing devices, and will not be described in detail or subject to specific protection requirements. Adding a display module 6 (e.g., OLED), a memory 7 (for storing historical data), and an accelerometer 8 (for motion monitoring), in conjunction with the processing module 1 and power module 2, constructs a complete health monitoring ecosystem: Display module 6: displays heart rate, impedance, and electrostatic status in real time (e.g., "Static electricity has been released" prompt); Accelerometer 8: monitors operator actions (e.g., whether the wristband has been removed, combined with impedance data to determine wearing status), solving the problem of "undetectable when the wristband is removed" in the background technology; Memory 7 and vibration module 10: store historical data (for later analysis of production line electrostatic distribution and operator health trends), and vibration module 10 provides reminders (e.g., vibration warning when static electricity has not been released, ensuring operational safety). Production line scenario adaptation: Through multi-sensor fusion (heart rate, impedance, acceleration), comprehensive monitoring of operators (wearing status, health status, electrostatic protection status) is achieved, improving production line safety (reducing accidents caused by electrostatic damage to components) and operator health management (e.g., long-term heart rate and body composition monitoring to prevent occupational health problems). Preferably, the memory 7 can be an MX25R2035FBDIL0, the vibration module 10 can be a DRV2605YZFR, the wireless communication module 9 can be an NCF2953XHN, the display module 6 can be a VGM096096A7W01, and the accelerometer 8 can be a BST-BMI160-DS000-07. The display module 6 includes a touch sensing module 11, see [link / reference]. Figure 11 The model number is TCH101L.

[0038] The working principle of this utility model is as follows:

[0039] 1. Power module 2: Detects battery power and automatically selects the system power supply path.

[0040] 2. Wireless communication module 9: Enables communication between the wristband and the base station in the 125KHz frequency band, and enables data communication between the wristband and the service in the 433MHz frequency band.

[0041] 3. Heart Rate Detection Module: This module calls the interface provided by the driver to implement the heart rate acquisition function and analyzes the acquired data to roughly calculate the human heart rate.

[0042] 4. Accelerometer 8: Calls the interface provided by the driver to realize the acquisition of 3D axis acceleration data and gyroscope data, stores and analyzes the data, and calculates the human body movement status and gesture movements.

[0043] 5. Impedance acquisition and electrostatic discharge circuit: Acquires human body impedance information and wristband grounding status and releases static electricity.

[0044] 6. Display module 6, OLED interface display: realizes the battery charging interface, time display interface, heart rate display interface, and Andon system interface, and uses touch buttons to switch between interfaces.

[0045] The system uses impedance acquisition and electrostatic discharge circuit 5 to collect impedance data and release static electricity. The system detects whether the bracelet is being worn by comparing the collected impedance with a threshold. If the bracelet is not being worn correctly, a vibration motor will alert the user. The smart bracelet communicates with the server (external host computer) via wireless communication module 9. Bracelets within the server gateway's coverage area also periodically send heart rate data to the server to determine online status. This function, once fully designed, can also be used for attendance tracking, detecting whether production line workers are at their workstations. All information collected by the bracelet is stored on the server. Furthermore, the smart anti-static bracelet in the system can also be used as a fitness tracker. The bracelet's display screen has a time display function and includes a built-in heart rate sensor, gyroscope, and accelerometer 8, which can detect the wearer's approximate heart rate trend and activity level, making it suitable for outdoor exercise.

[0046] Several points should be noted: First, in the description of this application, it should be noted that, unless otherwise specified and limited, the terms "installation", "connection" and "linkage" should be interpreted broadly, and can be mechanical or electrical connection, or internal connection between two components, or direct connection. "Up", "down", "left", "right", etc. are only used to indicate relative positional relationship. When the absolute position of the described object changes, the relative positional relationship may change.

[0047] Secondly: The accompanying drawings of the embodiments disclosed in this utility model only involve the structures involved in the embodiments disclosed in this utility model. Other structures can refer to the general design. In the absence of conflict, the same embodiment and different embodiments of this utility model can be combined with each other.

[0048] Finally, the above description is only a preferred embodiment of the present utility model. The protection scope of the present utility model is not limited to the above embodiments. All technical solutions that fall within the scope of the present utility model are protected by the present utility model.

[0049] It should be noted that for those skilled in the art, any improvements and modifications made without departing from the principles of this utility model should also be considered within the scope of protection of this utility model.

Claims

1. An antistatic smart bracelet, comprising a smart bracelet body, wherein the smart bracelet body is provided with a processing module, a power module, and a heart rate measurement module, the processing module and the heart rate measurement module are connected to the power module, the bracelet body is provided with bracelet contacts, the heart rate measurement module is communicatively connected to the processing module, and the heart rate measurement module is connected to the bracelet contacts, characterized in that: The wristband body also has an impedance acquisition and electrostatic discharge circuit, which includes an impedance acquisition module and a first electrostatic discharge circuit. The impedance acquisition module is connected to the power module and the first electrostatic discharge circuit, and the impedance acquisition module is also communicatively connected to the processing module. The heart rate measurement module is connected to a second electrostatic discharge circuit. The wristband contacts are connected to the impedance acquisition module.

2. The antistatic smart bracelet according to claim 1, characterized in that: The wristband contacts include a metal strap and a metal back ring. The first electrostatic discharge circuit includes a transient voltage suppressor (TVS2) and a resistor (R38). One end of the TVS2 and R38 is connected to the metal strap, and the other end is connected to ground. The impedance acquisition module includes a follower (U8). The third pin of the follower (U8) is connected to the metal strap, the fifth pin of the follower (U8) is connected to the power module, and the first pin of the follower (U8) is connected to the processing module to transmit impedance signals. The metal back ring contacts are connected to the heart rate measurement module for measuring heart rate. The second electrostatic discharge circuit includes a transient voltage suppressor (TVS1) connected to the metal back ring contacts.

3. The antistatic smart bracelet according to claim 2, characterized in that: A power filter module is also connected between the power module and the follower U8. The power filter module includes an inductor FB3 connected to the output terminal of the power module. The other end of the inductor FB3 is connected to the fifth pin of the follower U8, and one end of the capacitor C55 is connected to the other end of the capacitor C55. The other end of the capacitor C55 is grounded, and the output VCC_EM supplies power to the follower U8.

4. The antistatic smart bracelet according to claim 3, characterized in that: The fifth pin of the follower U8 is also connected to one end of the capacitor C56, and the other end of the capacitor C56 is grounded; the fourth pin of the follower U8 is connected to the first pin, and the second pin of the follower U8 is grounded.

5. The antistatic smart bracelet according to claim 4, characterized in that: The impedance acquisition module also includes a voltage divider module, which includes a resistor R21 and a capacitor C57. The resistor R21 is connected between the metal band and the third pin of the follower U8. One end of the capacitor C57 is connected to the metal band, and the other end of the capacitor C57 is connected to ground.

6. The antistatic smart bracelet according to claim 5, characterized in that: The watch band has pins TP59, TP60, TP61, and TP62. Pins TP59, TP60, TP61, and TP62 are connected to the metal of the watch band, the transient voltage suppressor TVS2, and the resistor R38, and are grounded through the transient voltage suppressor TVS2 and the resistor R38.

7. The antistatic smart bracelet according to claim 3, characterized in that: The heart rate measurement module includes a heart rate acquisition sensor U10 and a connecting circuit board. Pin TP50 of the connecting circuit board is connected to the metal ring on the bottom shell. Pin T51 of the connecting circuit board is connected to VCC_EM. Pin T51 is also connected to one end of a transient voltage suppressor TVS1. The other end of the transient voltage suppressor TVS1 is connected to ground. The first pin of the heart rate acquisition sensor U10 is connected to the power supply module.

8. The antistatic smart bracelet according to claim 7, characterized in that: A resistor R35 is also connected between pin TP51 ​​of the connecting circuit board and the other end of the inductor FB3. One end of the transient voltage suppressor TVS1 is connected to the end of the resistor R35 that is connected to VCC_EM.

9. The antistatic smart bracelet according to claim 7, characterized in that: The eighth pin of the heart rate sensor U10 is connected to pin TP35 of the connecting circuit board, the second pin of the heart rate sensor U10 is connected to pin TP36 of the connecting circuit board, the seventh pin of the heart rate sensor U10 is connected to pin TP37 of the connecting circuit board, and pins T40, T41, and T42 of the connecting circuit board are connected to the corresponding pins of the processing module.

10. The antistatic smart bracelet according to claim 1, characterized in that: The smart bracelet body also includes a display module, a memory, an accelerometer, a wireless communication module, and a vibration module. The vibration module, the display module, the memory, the wireless communication module, and the accelerometer are electrically connected to the power module. The vibration module, the display module, the memory, the wireless communication module, and the accelerometer are communicatively connected to the processing module. The wireless communication module can connect to an external host computer.

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