CN206507944U

CN206507944U - A kind of Intelligent bracelet

Info

Publication number: CN206507944U
Application number: CN201621159107.1U
Authority: CN
Inventors: 彭*; 彭; 吴兆强
Original assignee: Sichuan University of Science and Engineering
Current assignee: Sichuan University of Science and Engineering
Priority date: 2016-10-25
Filing date: 2016-10-25
Publication date: 2017-09-22
Anticipated expiration: 2026-10-25

Abstract

The utility model embodiment proposes a kind of Intelligent bracelet, including blue-teeth data communicating circuit, meter step circuit, electrocardiogram signal acquisition circuit, temperature check circuit, announcing circuit, power supply circuit.Wherein blue-teeth data communicating circuit includes DA4580 Bluetooth control chips, counting step circuit includes the motion process sensor chips of MPU 6050, electrocardiogram signal acquisition circuit includes BMD101 electrocardiogram acquisitions chip and ECG electrocardiogram acquisition circuits, temperature check circuit includes DS1624 digital temperature sensor chips, announcing circuit includes buzzer circuit, vibrations motor circuit, LED flashing circuits, and power supply circuit includes rechargeable battery, power supply module and charging module.

Description

A kind of Intelligent bracelet

Technical field

The utility model belongs to electronic technology field, more particularly to a kind of Intelligent bracelet.

Background technology

With the development of technology, various wearable devices gradually start popularization, and wherein Intelligent bracelet is always one Plant most common wearable device.Existing Intelligent bracelet in order to monitor in real time user various physical functions and motion feelings Condition simultaneously can be accordingly reminded user.But the news circuit design of existing Intelligent bracelet is unreasonable, cause just to Intelligent bracelet can not meet needs in performance.

Utility model content

For the irrational problem of Intelligent bracelet circuit design present in prior art, skill to be solved in the utility model Art problem is to provide a kind of Intelligent bracelet, can realize reliable and stable signal acquisition and keep efficient and stand-by time.

In order to solve the above problems, the utility model embodiment proposes a kind of Intelligent bracelet, including blue-teeth data communication Circuit, meter step circuit, electrocardiogram signal acquisition circuit, temperature check circuit, announcing circuit, power supply circuit.

Above-mentioned technical proposal of the present utility model has the beneficial effect that：The utility model embodiment proposes a kind of intelligence Bracelet, can pass through blue-teeth data communicating circuit connection meter step circuit, announcing circuit, temperature check circuit, ecg signal acquiring Circuit, communicates with the collection various parameters of stability and high efficiency and by blue-teeth data the intelligent terminal for being sent to connection.

Brief description of the drawings

Fig. 1 is the circuit diagram of the blue-teeth data communicating circuit of the utility model embodiment；

Fig. 2 is the circuit connection structure figure of the meter step circuit of the utility model embodiment；

Fig. 3 is the circuit connection structure figure of the electrocardiogram signal acquisition circuit of the utility model embodiment；

Fig. 4 employs buffer inductance to realize the electricity of one point earth for the simulation ground AGND in Fig. 3 and digitally between GND Line structure figure；

Fig. 5 is the circuit connection structure figure of the temperature check circuit of the Intelligent bracelet of the utility model embodiment；

Fig. 6 is the circuit connection structure figure of the buzzer circuit of the announcing circuit of the utility model embodiment；

Fig. 7 is the circuit connection structure figure of the vibrations motor circuit of the announcing circuit of the utility model embodiment；

Fig. 8 is the circuit connection structure figure of the LED flashing circuits of the announcing circuit of the utility model embodiment；

Fig. 9 is the circuit diagram of the charging module of the power supply circuit of the utility model embodiment；

Figure 10 is the circuit diagram of the power supply module of the power supply circuit of the utility model embodiment.

Embodiment

To make the technical problems to be solved in the utility model, technical scheme and advantage clearer, below in conjunction with accompanying drawing And specific embodiment is described in detail.

The utility model embodiment proposes a kind of Intelligent bracelet, including blue-teeth data communicating circuit, meter step circuit, electrocardio Signal acquisition circuit, temperature check circuit, announcing circuit, power supply circuit.Wherein blue-teeth data communicating circuit includes DA4580 indigo plants Tooth control chip, meter step circuit includes MPU-6050 motion process sensor chips, and electrocardiogram signal acquisition circuit includes BMD101 Electrocardiogram acquisition chip and ECG electrocardiogram acquisition circuits, temperature check circuit include DS1624 digital temperature sensor chips, notify electricity Road includes buzzer circuit, vibrations motor circuit, LED flashing circuits, and power supply circuit includes rechargeable battery, power supply module and filled Electric module.

Specifically：

Wherein blue-teeth data communicating circuit is as shown in Figure 1, including DA4580 Bluetooth control chips, wherein the DA4580 Bluetooth control chip be provided be used for respectively connection Intelligent bracelet sensor chip I/O pins P0_0~P0_7, pin P1_0~ P1_3, pin P2_0~P0_9；Wherein the MPU-6050 motion process sensor chips of step circuit are counted in the connection of P0_0 pins Control interface is interrupted, the interruption control of the MPU-6050 motion process sensor chips of P0_1 pins connection meter step circuit connects Mouthful, the I2C bus serial data interfaces of the MPU-6050 motion process sensor chips of P0_2 pins connection meter step circuit SDA, the I2C bus serial clock interfaces of the MPU-6050 motion process sensor chips of P0_1 pins connection meter step circuit SCL；P0_3 pins connect the 8th pin DCLR of baroceptor；P0_4 pins connect buzzer；P0_5 pins connect Connect the motor of announcing circuit；P0_6 pins connect the LED red lights of announcing circuit；P0_7 pins connect the LED of announcing circuit Green light；P1_0 pins connect the LED amber lights of announcing circuit；The DS1624 numeral temperature of P1_1 pin connector temperature detector slowdown monitoring circuits Spend the I2C bus serial data communication interfaces SDA of the first pin of sensor chip；P1_2 pin connector temperature detector slowdown monitoring circuits DS1624 digital temperature sensor chips the second pin I2C bus serial input clock interfaces SCL；P1_3 pins connect Meet the signal output part TX of the 4th pin of the BMD101 electrocardiogram acquisition chips of electrocardiogram signal acquisition circuit；The DA4580 bluetooths The reset circuit connecting interface RST connection reset circuits of 17th pin of control chip, the reset circuit includes providing multiple Position high level input voltage and controllable switch SW-PB, and the 17th pin reset circuit connecting interface RST also It is grounded by reset resistor R17；The 29th pin XTAL16Mm and the 30th pin of the DA4580 Bluetooth controls chip The external crystal oscillator Y2 of XTAL16Mp pins connection numerically-controlled oscillator；11st pin of the DA4580 Bluetooth controls chip XTAL32Km and the 12nd external crystal oscillator Y1 of pin XTAL32Kp connection RC oscillators；The DA4580 Bluetooth controls chip 35th pin RFIOp connection antennas ANT.As shown in Figure 1, the 14th pin of the DA4580 Bluetooth controls chip VBAT_RF is grounded by electric capacity C15；15th pin VBAT3V is grounded by electric capacity C11；19th pin VDCDV passes through electricity Hold C10 ground connection；21st pin SWITCH is grounded by inductance L2 and electric capacity C16；20th three-prong VBAT1V passes through simultaneously Electric capacity C14 and electric capacity the C16 ground connection of connection；25th pin SWDIO and the outside SWD of the 26th pin SW_CLK connections connect Mouthful；31st pin VDCDC_RF is grounded by electric capacity C13.It is as shown in Figure 1, the 16th pin GND, the 5th pin NC, 34th pin RFIOm, the 0th pin GND are grounded.Wherein, DA14580 minimum systems design uses decompression mode, Powered by nickel manganese charged lithium cells.As shown in Figure 1, reset resistor R17 resistance is 3.3K Ω.Wherein digital control vibration The external crystal oscillator Y1 of device is 16.000MHz；The external crystal oscillator Y2 of RC oscillators is 32.768kHz.

Wherein, the connection of the I/O pins can be such as following table：

Pin name	Connection
		P0_0	MPU-6050 INT(12)
P0_1	MPU-6050 SDA(24)
		P0_2	MPU-6050 SCL(23)
P0_3	BMP085 XCLR(8)
		P0_4	Buzzer NPN(B)
P0_5	Motor NPN(B)
		P0_6	LED_RED positive poles
P0_7	LED_GREREN positive poles
		P1_0	LED_YELLOW positive poles
P1_1	DS1624 SDA(1)
		P1_2	DS1624 SCL(2)
P1_3	BMD101 TX(4)

As shown in Figure 2, meter step circuit includes MPU-6050 motion process sensor chips；Tenth three-prong power supply interface VDD connection power supply circuit BAT_3.3V, the voltage of the power supply circuit is 3.3V ± 0.5%；And at the MPU-6050 motions The tenth three-prong power supply interface VDD for managing sensor chip is grounded GND by the second electric capacity C2.First pin Pin 1 (CLKIN) Inputted as optional external clock；First pin is without using being directly grounded GND in the utility model embodiment.6th pipe Pin Pin 6 is the serial data interface AUX_DA of external baroceptor, connects external baroceptor.7th pin Pin 7 For the serial clock interface AUX_CL of external baroceptor, the clock of external baroceptor is connected.8th pin Pin 8 is Logic supply voltage VLOGIC, connection logic power supply circuit BAT_3.3V magnitude of voltage, and its triggering mode are that monotone edges edge is touched Hair, connects a 10nF electric capacity C4.9th pin Pin 9 is signal group power interface AC0, and connection I2C buses are to be used as address Signal group in least significant bit Slave Address LSB (Least Significant Bit), the utility model embodiment Power interface AC0 is set to signal group power interface Signal Group power port.Tenth pin Pin 10 filters for calibration Capacitive interface, connects a 0.1 μ F electric capacity C1.11st pin Pin 11 is frame synchronization data input FSYNC, is grounded GND.The 12 pin Pin 12 interrupt control interface INT connection Bluetooth communication chips SoC P0_0 interfaces.20th pin Pin 20 The charge pump C3 for being 10nF for charge pump connecting interface CPOUT connections capacitance.The serial number of 20th three-prong 12C buses According to interface SDA connection Bluetooth communication chips SoC P0_2 interfaces；The 12C bus serial clock interfaces SCL of 24th pin Connect Bluetooth communication chip SoC P0_1 interfaces.

Electrocardiogram signal acquisition circuit, its circuit structure as shown in Figure 3 and Figure 4, using god read by ecg signal acquiring module Scientific and technological BMD101 sensors are used as design core.Wherein, Pin 0 (CS) is chip select pin；Pin 1 (SEP) and Pin 2 (SEN) For electrode input end of analog signal, for gathering electrocardial analog signal；When Pin 3 (RX) is that BMD101 is communicated with serial ports Receive the interface of data, i.e. data write-in end；Pin 4 (TX) is BMD101 signal output parts, the Pin 6 with DA14580 chips (P1_3) mouth is connected；Pin 5 is high flat RC reset circuits, there is provided (R3 needs a voltage stabilizing two in parallel to a 10K pull-up resistors R3 Pole pipe D1, plays pressure stabilization function) and a 0.1 μ F filter capacitors C4；Pin 6 is GND；Pin 7 is VDD, is gone here and there between VDD and GND One 10 μ F filter capacitors C5 of connection (are decoupled, eliminate high-frequency noise)；AGND is the simulation of circuit, simulation ground and digitally not It can be connected with direct short-circuit, otherwise can cause to interfere with each other.What it is due to device measuring is all low-frequency analog signal, and signal end can be with Regard as a voltage source.As shown in Figure 2, design has done overstriking using the access way of one point earth to simulation ground AGND Processing, and its length is shortened, while 10 μ H inductance are added as buffering in simulation ground AGND and digitally between GND, to subtract Few interfering between the two.

The circuit structure of temperature check circuit is as shown in Figure 5, is made using DS1624 digital temperature sensors chip, its Pin 1 (SDA) is I2C serial data communication interfaces, and Pin 2 (SCL) is I2C serial input clocks, respectively at DA14580's P1_1, P1_2 are attached, and two interface pull-up resistors are 4.7K Ω；Pin 3 is NC；Pin 4 is GND；Pin 5、6、7 (A0, A1, A2) is address input end, the quantity of its geocoding determine in SDA buses can carry DS1624 quantity, body A thermometric chip is only needed in warm module, so A0, A1, A2 are directly connected with GND herein；Pin 8 (VCC) is DS1624 Operating voltage input interface, is provided by DC-DC output voltages (BAT_3.3V).

As shown in Fig. 6, Fig. 7, Fig. 8, announcing circuit includes buzzer circuit, vibrations motor circuit, LED flashing circuits；

Wherein described buzzer circuit includes buzzer Buzzer and triode 3904, wherein the buzzer is parallel with the Three resistance R3, and connect the colelctor electrode of power supply circuit BAT 3.3V and triode, the emitting stage ground connection GND of the triode, institute The base stage of triode 3904 is stated by the P0_4 pins of current-limiting resistance R4 connection Bluetooth communication chips, and is connect by filter capacitor C6 Ground GND；

Wherein described vibrations motor circuit includes motor M1 and NPN type triode Q1；Wherein described vibrations motor M1 is in parallel Voltage-regulator diode D1, and connect power supply circuit BAT 3.3V and triode Q1 colelctor electrode；And triode Q1 base stage passes through limit The P0_5 pins of leakage resistance R6 connection Bluetooth communication chips, and triode Q1 grounded emitter GND；And pass through filter capacitor C6 It is grounded GND；

Wherein described LED flashing circuits include at least one LED, and the LED connects bluetooth by current-limiting resistance Communication chip.

Buzzer circuit is mainly used to send buzzing prompting, circuit design principle such as Fig. 6；The access voltage of buzzer is 3.3V, buzzer Buzzer is capacitive, it is necessary to one 2K Ω resistance R3 of parallel connection herein.To increase the volume of buzzer, buzzer The other end need to access a triode and be driven, and triode B poles (base stage) are by Bluetooth communication chip DA14580 Soc P0_5 Pin controlling switch, B limit leakage resistances R4 is 4.7K, and filter capacitor C6 is 1nF.

Vibrations motor circuit is the direct current generator that inertia vibrations are produced using eccentric wheel, is mainly used to send vibration prompting, Its circuit design such as Fig. 7.Pin P0_5 is NPN type triode Q1 base stage control ports, and its current-limiting resistance R6 is 100 ohm, meter Calculate formula as follows：

R_CLR=(V_in-V_VF)/I_COC

Wherein, R_CLRFor required current-limiting resistance, V_inFor input voltage, V_VFFor triode forward conduction voltage drop, I_COCTo set Fixed cut-off current.

When base stage puts high level, NPN is turned on, and is then closed when being set to low level.BAT_3.3V (3.3V) is vibrations motor Normal working voltage, is inputted by its positive terminal.Diode D1 is micro-vibration-motor M1 voltage-regulator diode, for keeping shake The stabilization of dynamic motor M1 voltages.

The LED of LED flashing circuits design has yellow three color of red indigo plant, respectively by the three of Bluetooth communication chip DA14580Soc Individual pin P0_6, P0_7, P0_8 are programmed control；Circuit design principle such as Fig. 8.

Power supply circuit includes charging module as shown in Figure 9 and power supply module as shown in Figure 10, in addition to chargeable electricity Pond BT1.

In one embodiment of the present utility model, rechargeable battery BT1 selects the charged lithium cells of SUN 452535；It fills Piezoelectric voltage is 4.2V, and normal input voltage is 3.7V, and it is charged using USB interface.

As shown in Figure 9, the VBUS input voltages of the charging module USB are 5V, and USB charging management chips are Linear The charging management chip LTC4053-4.2 of company, its input voltage is accessed from the second pin Pin 2 (VCC), output charging electricity Pressure is exported from the 9th pin Pin 9 (BAT)；Its output voltage is generally 4.2V~5V；Output current I_BATBy the 7th pin Pin The outer meeting resistance R16 of 7 (PROG) connections is determined, is drawn wherein the 7th pin PROG is charging current and charging current monitoring program Pin.Explained as example, wherein outer meeting resistance R16 (also referred to as R_PROG) resistance can be calculated by below equation：

I_CHG=(I_PROG) × 1000=(1.5V/R_PROG)×1000

R_PROG=1500V/I_CHG

Wherein, RPROG is the resistance R16 for connecting the 7th pin PROG, if the charging current that sets of charging module as 100mA, can obtain R_PROGFor 15K Ω.

Wherein the 6th pin Pin 6 (NTC) is zero setting in negative temperature coefficient, the utility model embodiment.5th pin Pin 5 (GND) are chip ground pin, are grounded GND.4th pin Pin 4 (TIMER) is to set pin, charging interval in the charging interval Determined by the size of the first external electric capacity C8 of the 4th pin TIMER pins.Explained as example, first electric capacity C8's Calculation formula is as follows：

Timer (Hours)=(3Hours) × (C_TIMER/0.1μF)

Thus the 4th pin TIMER the first electric capacity C8 (also referred to as C can be calculated_TIMER) below equation meter can be passed through Calculate：

C_TIMER=0.1 μ F × Time (Hours)/3 (Hours)

Assuming that the predetermined charging interval is 3 hours, the first electric capacity C8 (also referred to as C can be obtained by formula_TIMER) it is 0.1 μ F.

As shown in Figure 10, the output voltage of power supply module is 3.3V ± 0.5%, and output current is 1200mA.Power supply mould The first pin VIN that block includes buck conversion chip TPS63001, the buck conversion chip TPS63001 passes through filtering Electric capacity C1 connection input voltage VBAT (1.8-5V)；Second pin VINA connection supply voltage control signal input circuits；3rd Pin SYNCPS connection battery saving mode control signal input circuits；4th pin EN connections equipment enables signal input circuit；The Nine pin FB are chip internal voltage error amplifier, connect feedback signal input circuit；Tenth pin yOUT connection voltages are defeated Go out circuit；The isolation inductance L1 for being used for eliminating inductive current is provided between 0th pin L1 and the 11st pin L11.

Explained as example, the 0th pin L1 and the 11st pin L11 pin output valve can pass through below equation Calculate：

L_L1=(V_o(V₁-V_o))/(0.3V₁f)

L_L2=(V₂(V_o-V₂))/(0.3V₂f)

Wherein, L_L1、L_L2Respectively decompression mode output minimum inductance value exports minimum inductance value, V with boost mode₁、V₂ Respectively decompression mode input minimum amount of voltage that and boost mode input minimum amount of voltage that；V_oFor voltage output value, f opens for minimum Close frequency.

As shown in Figure 10, wherein the isolation inductance L1 values connected between the 0th pin L1 and the 11st pin L2 exist Between LL1, LL2.

In an embodiment of the present utility model, the output voltage of power supply module design is 3.3V；It is best to obtain Control effect, present embodiment selection isolation inductance L1 inductance value is 2.2 μ H, to be used as the 0th pin Pin 0 and the tenth Isolation inductance between one pin Pin 11.

Described above is preferred embodiment of the present utility model, it is noted that for the ordinary skill of the art For personnel, on the premise of principle described in the utility model is not departed from, some improvements and modifications can also be made, these improvement Protection domain of the present utility model is also should be regarded as with retouching.

Claims

1. a kind of Intelligent bracelet, it is characterised in that including blue-teeth data communicating circuit, meter step circuit, electrocardiogram signal acquisition circuit, Temperature check circuit, announcing circuit, power supply circuit；

Wherein blue-teeth data communicating circuit includes DA4580 Bluetooth control chips, wherein the DA4580 Bluetooth controls chip is provided with For connect respectively the I/O pins P0_0~P0_7, pin P1_0~P1_3, pin P2_0 of Intelligent bracelet sensor chip~ P0_9；

Wherein the interruption control interface of the MPU-6050 motion process sensor chips of step circuit is counted in the connection of P0_0 pins, the The interruption control interface of the MPU-6050 motion process sensor chips of P0_1 pins connection meter step circuit, the connection of P0_2 pins Count the I2C bus serial data interfaces of the MPU-6050 motion process sensor chips of step circuit, P0_1 pins connection meter step The I2C bus serial clock interfaces of the MPU-6050 motion process sensor chips of circuit；P0_3 pins connect air pressure sensing 8th pin of device；P0_4 pins connect buzzer；P0_5 pins connect the motor of announcing circuit；P0_6 pins are connected The LED red lights of announcing circuit；P0_7 pins connect the LED green lights of announcing circuit；P1_0 pins connect the LED of announcing circuit Amber light；The I2C buses of first pin of the DS1624 digital temperature sensor chips of P1_1 pin connector temperature detector slowdown monitoring circuits Serial data communication interface；Second pipe of the DS1624 digital temperature sensor chips of P1_2 pin connector temperature detector slowdown monitoring circuits The I2C bus serial input clock interfaces of pin；P1_3 pins connect the BMD101 electrocardiogram acquisition cores of electrocardiogram signal acquisition circuit The signal output part of 4th pin of piece；

The reset circuit connecting interface connection reset circuit of 17th pin of the DA4580 Bluetooth controls chip, the reset Circuit includes providing the input voltage and controllable switch for resetting high level, and the reset circuit connection of the 17th pin Interface is also grounded by reset resistor；

29th pin of the DA4580 Bluetooth controls chip and the 30th pin connection external crystalline substance of numerically-controlled oscillator Shake；

11st pin of the DA4580 Bluetooth controls chip and the 12nd pin connection external crystal oscillator of RC oscillators；

The 35th pin connection antenna of the DA4580 Bluetooth controls chip；

Counting step circuit includes MPU-6050 motion process sensor chips, the of the MPU-6050 motion process sensor chip The external clock input pin connection external clock of one pin or ground connection；The serial data interface connection external pressure of 6th pin Sensor；The external baroceptor serial clock interface connection external pressure sensor clock of 7th pin：8th pin The outer logic circuit of the dull edging trigger of logic supply voltage connection, the outer logic circuit includes the 4th electricity of ground connection Hold；9th pin signal group power interface connects I2C buses using as from address least significant bit；The calibration filtering of tenth pin Port connection calibration filter capacitor；The pin frame synchronization data input ground connection of 11st pipe；The interruption control interface of 12nd pin Connect the P0_0 interfaces of Bluetooth communication chip；The charge pump connecting interface connection charge pump of 20th pin；20th three-prong I2C bus serial datas interface connection Bluetooth communication chip；The I2C bus serials clock interface connection of 24th pin is blue Tooth communication chip；

Electrocardiogram signal acquisition circuit includes BMD101 electrocardiogram acquisitions chip, ECG electrocardiogram acquisition circuits；Wherein described BMD101 electrocardios The electrode analog input interface of the pin of acquisition chip first and the second pin is connected to gather the biography of electrocardial analog signal Sensor；The data write-in interface RX of three-prong receives data by universal serial bus；The signal output interface connection of 4th pin Bluetooth communication chip output data；The high level reseting interface of 5th pin is to connect high level reset circuit, the high level Reset circuit includes pull-up resistor and voltage-regulator diode parallel with one another, and the 5th pin is also grounded by filter capacitor；

Wherein described ECG electrocardiogram acquisitions circuit includes connector, and the BMD101 electrocardiogram acquisitions chip is adopted by connector connection Collect the sensor of electrocardial analog signal, wherein the 4th pin of connector connects the first pipe of the BMD101 electrocardiogram acquisitions chip Pin, and the second pin of the first pin connection BMD101 electrocardiogram acquisitions chip of connector；And the second of the connector Pin and three-prong connection simulation ground；4th pin of the connector simulates ground by the connection of the first electrostatic discharge circuit, And first pin pass through the second electrostatic discharge circuit connection simulation ground；

Connected between wherein described simulation ground and ground connection by buffer inductance；

Temperature check circuit includes DS1624 digital temperature sensor chips, the of the DS1624 digital temperature sensors chip The I2C bus serial datas communication interface of one pin and the I2C bus serial input clocks interface connection bluetooth of the second pin are led to Interrogate chip, and the I2C bus serial datas communication interface and the I2C bus serial input clock interfaces of the second pin of the first pin It is connected to pull-up resistor；The ground interface ground connection of the wherein described pin of DS1624 digital temperature sensors chip the 4th；And The 4th pin, the 5th pin, the address input interface of the 6th pin of DS1624 digital temperature sensor chips are all grounded；

Announcing circuit includes buzzer circuit, vibrations motor circuit, LED flashing circuits；

Wherein described buzzer circuit includes buzzer and triode, wherein the buzzer is parallel with 3rd resistor, and connects The colelctor electrode of power supply circuit and triode；The emitting stage ground connection of the triode；The base stage of the triode passes through current-limiting resistance Bluetooth communication chip is connected, and is grounded by filter capacitor；

Wherein described vibrations motor circuit includes motor and NPN type triode；Wherein described vibrations motor shunt regulator diode Afterwards, the colelctor electrode of connection power supply circuit and triode；And the base stage of triode connects Bluetooth communication chip by current-limiting resistance, and It is grounded by filter capacitor；The grounded emitter of triode；

Wherein described LED flashing circuits include at least one LED, and the LED connects Bluetooth communication by current-limiting resistance Chip；

Power supply circuit includes rechargeable battery, power supply module and charging module；Wherein,

The charging module includes Charge Management sub-circuit and USB interface sub-circuit, and the USB interface sub-circuit passes through charging valve Manage sub-circuit and connect the rechargeable battery；The Charge Management sub-circuit includes LTC4053-4.2 charging management chips, described The second pin connection USB interface sub-circuit of the electric current input of LTC4053-4.2 charging management chips, the 9th pin connection is described Rechargeable battery；And the 6th pin ground connection for being used to determine negative temperature coefficient of the LTC4053-4.2 charging management chips, institute The 7th pin for stating LTC4053-4.2 charging management chips is connected to determine the outer meeting resistance of charging circuit, described 4th pin of LTC4053-4.2 charging management chips is connected to determine first electric capacity in charging interval；Wherein described USB connects Openning circuit includes USB interface chip, and the first pin of USB interface chip connects the LTC4053-4.2 charging management chips Electric current input the second pin, and pass through the second capacity earth；

The power supply module includes buck conversion chip TPS63001, the buck conversion chip TPS63001 the first pipe Pin connects input voltage by filter capacitor；Second pin connects supply voltage control signal input circuit；Three-prong is connected Battery saving mode control signal input circuit；4th pin connection equipment enables signal input circuit；9th pin is chip internal Voltage error amplifier, connects feedback signal input circuit；Tenth pin connects voltage follower circuit；0th pin and the 11st The isolation inductance for being used for eliminating inductive current is provided between pin.

2. Intelligent bracelet according to claim 1, it is characterised in that the DA4580 bluetooths of the blue-teeth data communicating circuit 14th pin of control chip passes through the 15th capacity earth；15th pin passes through the 11st capacity earth；19th pipe Pin passes through the tenth capacity earth；21st pin passes through the second inductance and the 16th capacity earth；20th three-prong passes through 14th electric capacity and the 16th capacity earth in parallel；25th pin and the outside SWD interfaces of the 26th pin connection；The 31 pins pass through the 13rd capacity earth；38th pin connects external power supply, and passes through the 12nd capacity earth；Institute State the 35th pin of DA4580 Bluetooth control chips and pass through the first inductance in parallel, the 16th resistance, the 9th electric capacity and the 17 resistance eutral groundings；16th pin, the 5th pin, the 34th pin, the 0th pin are all grounded.

3. Intelligent bracelet according to claim 1, it is characterised in that the MPU-6050 motion process of the meter step circuit is passed The power supply interface connection power supply circuit of tenth three-prong of sensor chip, the voltage of the power supply circuit is 3.3V ± 0.5%；And The power supply interface of tenth three-prong of the MPU-6050 motion process sensor chip passes through the second capacity earth；The MPU- The logic supply voltage of the logic supply voltage of 8th pin of 6050 motion process sensor chips is less than connection the 13rd and managed The voltage of the power supply circuit of the power supply interface of pin；The capacitance of the calibration filter capacitor is 0.1 μ F；The electricity of second electric capacity Capacitance is 0.1 μ F；The capacitance of the charge pump is 10nF；The capacitance of 4th electric capacity is 10nF.

4. Intelligent bracelet according to claim 1, it is characterised in that the electrocardiogram signal acquisition circuit also includes second and inserted Seat, the first pin of second socket connects the 5th pin of the BMD101 electrocardiogram acquisitions chip by filter capacitor, and Second pin of second socket is signal output port；The confession of 7th pin of wherein described BMD101 electrocardiogram acquisitions chip Electrical interface connects power supply circuit, and is grounded by filter capacitor；The capacitance of the filter capacitor of the electrocardiogram signal acquisition circuit For 10 μ F；The inductance value of the buffer inductance of electrocardiogram signal acquisition circuit is 10 μ H；The pull-up resistor of electrocardiogram signal acquisition circuit Resistance is 10K Ω；The 6th pin ground connection of the BMD101 electrocardiogram acquisitions chip, and the 0th pin is chip select pin.

5. Intelligent bracelet according to claim 1, it is characterised in that the DS1624 digital temperatures of the temperature check circuit The power supply interface connection power supply circuit of 8th pin of sensor chip；The I2C bus serial datas communication of first pin The pull-up resistor of the I2C bus serial input clock interfaces of the pull-up resistor of interface and the second pin all connects the power supply electricity Road.

6. Intelligent bracelet according to claim 1, it is characterised in that the LED flashing circuits of the announcing circuit are provided with 3 LED, including LED red lights, LED green lights, LED amber lights；Wherein described LED red lights, LED green lights, LED amber lights are each via current limliting Resistance connects the Bluetooth communication chip；The resistance of the current-limiting resistance of the LED flashing circuits is 1K Ω；The buzzer The resistance of 3rd resistor is that 2K Ω, the resistance of current-limiting resistance are that 4.7K Ω, the capacitance of filter capacitor are 1nF；The vibrations horse Resistance up to the current-limiting resistance of circuit is 100 Ω.

7. Intelligent bracelet according to claim 1, it is characterised in that two of the USB interface chip of the power supply circuit Data pins connect the first pin of power supply by resistance respectively, and pass through resistance eutral grounding respectively；The LTC4053-4.2 chargings The resistance of the outer meeting resistance of the 7th pin connection of managing chip is 15K Ω；The rechargeable battery is that SUN 452535 charges Lithium battery；The output voltage of the power supply module is 3.3V；The inductance value of the isolation inductance is 2.2 μ H.