CN212234441U

CN212234441U - Portable and wearable electroencephalogram signal acquisition device

Info

Publication number: CN212234441U
Application number: CN201922373697.8U
Authority: CN
Inventors: 徐伟; 董璐; 石嘉; 杨帆; 吴亚杰; 田琳琳; 苏梦雅; 郝思敏
Original assignee: Tianjin Polytechnic University
Current assignee: Tianjin Polytechnic University
Priority date: 2019-12-25
Filing date: 2019-12-25
Publication date: 2020-12-29
Anticipated expiration: 2029-12-25

Abstract

The utility model provides a portable and wearable electroencephalogram signal acquisition device, which comprises an electroencephalogram signal acquisition unit, an information transmission Bluetooth unit, an information receiving Bluetooth unit, a lithium battery power supply unit, a lithium battery electricity meter unit, a DC-DC boosting unit, an LDO linear voltage stabilizing unit, a lithium battery charging unit, a singlechip control unit and an OLED display unit; EEG signal acquisition unit, OLED display element links to each other with single chip microcomputer control unit, lithium battery power supply unit and lithium battery charging unit, lithium battery coulometer unit links to each other, lithium battery charging unit is connected with DC-DC voltage boosting unit, DC-DC voltage boosting unit is connected with LDO linear voltage stabilizing unit, LDO linear voltage stabilizing unit and single chip microcomputer control unit, EEG signal acquisition unit, information transmission bluetooth unit is connected, information transmission bluetooth unit sends information to information reception bluetooth unit, thereby realize portable, wearable EEG signal collection and data transmission function, carry out the quantitative analysis to the EEG signal of gathering.

Description

Portable and wearable electroencephalogram signal acquisition device

Technical Field

The utility model belongs to the technical field of electronic equipment, relate to a portable, wearable brain electrical signal collection system by it.

Background

The electroencephalogram signal collector is a most commonly used medical instrument and has great significance in electroencephalogram, insomnia diagnosis, cranial nerve system detection and brain surgery. The electroencephalogram signal acquisition device mainly comprises a lead part (electrode), an electroencephalogram signal front-end signal processing part (complex preceding stage amplification and filtering), a signal acquisition part (high-precision AD acquisition) and an upper computer UI interface, and is used for carrying out abnormity analysis and pathological detection on the electroencephalogram signals of a patient through amplification, filtering, acquisition, quantization, coding, uploading and analysis.

Most of medical devices of the traditional electroencephalogram acquisition device are imported, technical monopoly and high in cost are achieved, iterative upgrade cannot be achieved on the basis of the traditional electroencephalogram acquisition device, most of the devices are analog circuits, and the devices are very large and difficult to carry and carry.

SUMMERY OF THE UTILITY MODEL

Defect to prior art, the utility model provides a portable, wearable EEG signal collection system, aim at improving the application scene and combine the thing networking, the electronic medical instrument of distributing type, just at present the thing networking, the electronic equipment design requirement of distributing type, the health demand of patient more can be satisfied to the medical instrument of portableization, timely diagnosis and treatment, be favorable to the collection and the diagnosis of some random EEG abnormal signal, through wearable, the design constraint of portableization, the circuit is small and exquisite light more, the unnecessary processing circuit at the signal processing front end of traditional EEG signal collection system has been avoided, more accurate and convenient data source mode has been brought for medical personnel.

The utility model provides a technical scheme is: a portable wearable electroencephalogram signal acquisition device comprises an electroencephalogram signal acquisition unit, an information transmission Bluetooth unit, an information receiving Bluetooth unit, a lithium battery power supply unit, a lithium battery electricity meter unit, a DC-DC boosting unit, an LDO linear voltage stabilizing unit, a lithium battery charging unit, a single chip microcomputer control unit and an OLED display unit; EEG signal acquisition unit, OLED display element links to each other with single chip microcomputer control unit, lithium battery power supply unit and lithium battery charging unit, lithium battery coulometer unit links to each other, lithium battery charging unit is connected with DC-DC voltage boosting unit, DC-DC voltage boosting unit is connected with LDO linear voltage stabilizing unit, LDO linear voltage stabilizing unit and single chip microcomputer control unit, EEG signal acquisition unit, information transmission bluetooth unit is connected, information transmission bluetooth unit sends information to information reception bluetooth unit, thereby realize portable, wearable EEG signal collection and data transmission function, carry out the quantitative analysis to the EEG signal of gathering.

As an improved scheme, the portable wearable electroencephalogram signal acquisition device further comprises an OLED display unit, wherein the OLED display unit is used for displaying information and optimizing a human-computer interaction scheme;

as an improved scheme, the portable wearable electroencephalogram signal acquisition device further comprises a complete battery management control scheme;

as an improved scheme, the portable wearable electroencephalogram signal acquisition device greatly reduces a front-end signal processing circuit by carrying out portable wearable design.

The EEG signal acquisition unit and the OLED display unit are connected with the singlechip control unit, the single chip microcomputer control unit is connected with an information transmission Bluetooth unit which is communicated with an information receiving Bluetooth unit attached to an upper computer through a Bluetooth protocol, the LDO linear voltage stabilization unit respectively supplies power to the electroencephalogram signal acquisition unit, the singlechip control unit and the information transmission Bluetooth unit, the lithium battery power supply unit is connected with the lithium battery electricity meter unit, the lithium battery electricity meter unit is connected with the lithium battery charging unit, the lithium battery power supply unit boosts the voltage through the lithium battery charging unit and the DC-DC boosting unit, the DC-DC boosting unit is connected with the LDO linear voltage stabilizing unit to provide a continuous power supply for the LDO linear voltage stabilizing unit.

The utility model discloses an EEG signal acquisition unit, EEG signal acquisition unit is ADS1299 including gathering the IC, and external reference IC is LM4140ACM-1.0 NOPB, it is equipped with pin DVDD, pin AVDDx, pin AVSSx, pin VREFP, pin VREFN, pin CLKSEL, pin DRDY, pin DOUT, pin SCLK, pin CS, pin START, pin RESET, pin PWDN, pin DIN, pin INxN, pin INxP, pin SRB1, pin VCAP1, pin VCAP2, pin VCAP3, pin VCAP4, pin RESED, pin BIASOUT, pin BIASINV and pin AGND to gather the hardware circuit contact of external reference is equipped with pin GND, pin VREF VIN; the utility model discloses a singlechip control unit, singlechip control unit includes that master control IC is STM32F103C8T6, the control hardware circuit contact is equipped with pin OSCIN, pin OSCOUT, pin NRST, pin VSSA, pin VDDA, pin I2C1_ SDA, pin I2C1_ SCL, pin I2C2_ SDA, pin I2C2_ SCL, pin SWCLK, pin 5V, pin DVDD, pin SWDIO, pin USART1_ RXD, pin USART1_ TXD, pin USART2_ RXD, pin USART2_ TXD, pin PWDN, RESET, pin START, pin DADY, pin GND, pin PA1, pin 15, pin PB14, pin 13, pin PB12, pin PB1, pin 58PB 11, pin PA 6342, pin 68628, pin VSS 9, pin VSS 462, pin 465, pin PB 461, pin 695 _ VDD, pin 0, pin 82863 _ VDD;

the device comprises an electroencephalogram signal acquisition unit, a main control unit, a low voltage drop-out (LDO) unit, a low voltage drop-out (VCAP) unit, a power supply unit (VCAP) unit (VCAP 39 2), a power supply unit (VCAP) unit (VCAP unit) unit (VCDD unit) unit, a power supply unit (VCAD unit) unit (VCDD unit), a power supply unit (AVDDD unit), The pin PWDN, the pin RESET, the pin START, the pin DOUT, the pin SCLK, the pin CS and the pin DIN are respectively connected with a pin PB0, a pin PB13, a pin PB12, a pin PB1, a pin PA6, a pin PA5, a pin PA4 and a pin PA7 of the main control IC, the pin SRB1 is connected with a connecting terminal P5, the other ends of the pin INxN, the pin InxP and the resistor Rp and the pin SRB1 are respectively connected with a low pass filter consisting of a resistor of 4.99K omega and a capacitor of 4.7nF through a connecting terminal P5, the interface is respectively led to the connecting terminals P1 and P3, the pin VCREFP of the acquisition IC is connected with the capacitors of 10 muF and 0.1 muF, the pin EFVRN is connected with the other ends of the capacitors of 10 muF and 0.1 muF, the pin of the pin AGND is connected in series with a resistor of 0 muF, the external reference pin IC, the pin EN, the pin LDEN and the pin of the LDEN are connected with the capacitor of the pin of the linear, the other end of the 1 mu F capacitor is connected with a pin AGND, the pin GND is connected with the pin AGND, a pin VREF is connected with the 1 mu F capacitor, the other end of the 1 mu F capacitor is connected with the pin AGND, and the pin VREF is connected with a contact pin VREFP of the acquisition hardware circuit;

wherein, the pin OSCIN and the pin OSCOUT of the control hardware circuit contact of the single chip microcomputer control unit are respectively connected with two ends of a 1M omega resistor and a 8MHz crystal oscillator, two ends of the 8MHz crystal oscillator are respectively connected with a 20pF capacitor, the other end of the 20pF capacitor is connected with a pin GND, a pin NRST is connected with a 10K omega resistor, a1 muF capacitor and a key switch, the other end of the 10K omega resistor is connected with a pin DVDD of the LDO linear voltage stabilizing unit, the other ends of the 1 muF capacitor and the key switch are connected with a pin GND, a pin VSSA and a pin VDDA are respectively connected with a 10nF capacitor and a1 muF capacitor, a pin AVDD of the LDO linear voltage stabilizing unit is connected with a pin VDDA, a pin VSSA is connected with the pin GND, a pin BOOT1 is connected with the 10K omega resistor, the other end of the 10K omega resistor is connected with a terminal P8, a pin BOOT0 is connected, the other end of the 10K omega resistor is connected with a connecting terminal P8, a pin VSS _1 is connected with a pin GND, a pin VDD _1, a pin VDD _2 and a pin VDD _3 are all connected with a pin DVDD of the LDO linear voltage stabilizing unit, a pin VSS _2 is connected with a pin 5V, a pin PB15 and a pin PB14 are respectively connected with 10K omega resistors, the other ends of the two 10K omega resistors are respectively connected with two LEDs 1 and LED2, the other ends of the LEDs 1 and LED2 are connected with the pin DVDD of the LDO linear voltage stabilizing unit, a pin I2C2_ SDA, a pin I2C2_ SCL, a pin DVDD and a pin GND are respectively connected with a connecting terminal P9, a pin USART2_ RXDD, a pin USART2_ TXD, a pin and a pin DVDD of the LDO linear voltage stabilizing unit are connected with the connecting terminal P10, a pin PA11 is connected with a 10K omega resistor, the other end of the pin PA12 is connected with, the other end of one 10K omega resistor is connected with a USB connecting terminal, the other end of the other 10K omega resistor is connected with AVDD +5V of the USB connecting terminal, a pin DVDD, a pin SWDIO, a pin SWCLK and a pin GND of an LDO linear voltage stabilizing unit are connected with a connecting terminal P11, the pin DVDD and the pin GND of the LDO linear voltage stabilizing unit are connected with a1 muF capacitor, a pin I2C2_ SDA, a pin I2C2_ SCL, the pin DVDD and the pin GND of the LDO linear voltage stabilizing unit are connected with a connecting terminal P9, the connecting terminal P9 is used for being connected with an OLED display unit, a pin USART2_ RXD, a pin USART2_ TXD, the pin GND and the pin DVDD of the LDO linear voltage stabilizing unit are connected with a connecting terminal P10, and the connecting terminal P10 is used for being connected with.

The utility model comprises a lithium battery charging unit, the lithium battery charging unit comprises a lithium battery charging IC which is BQ2100DBVR, a charging hardware circuit contact is provided with a pin TS, a pin OUT, a pin CHG, a pin VIN, a pin GND, a pin ISET, the pin TS is connected with a 103AT NTC thermistor, the pin CHG is connected with a 1.5K omega resistor, the other ends of the 103AT NTC thermistor and the 1.5K omega resistor are connected with an LED3, the other end of the LED3 is connected with the pin GND, the pin ISET is connected with the 1K omega resistor, the other end of the 1K omega resistor is connected with the pin GND, the pin VIN is connected with a1 muF capacitor, the other end of the 1 muF capacitor is connected with the pin GND, the pin VIN is connected with the AVDD +5V of a USB terminal, the terminal J6 is connected with the terminal of the pin GND, the pin OUT is connected with the 1 muF, the pin OUT is connected to a 50m Ω resistor, a1 μ F capacitor, and a 100 μ F capacitor, respectively.

The utility model comprises a lithium battery electricity meter unit, which comprises a lithium battery electricity meter IC and a lithium battery electricity meter hardware circuit contact; the lithium battery electricity meter IC is LTC2944, a contact of a hardware circuit of the lithium battery electricity meter is provided with a pin SENSE +, a pin SENSE-, a pin GND, a pin SCL, a pin SDA and a pin ALCC, the pin SENSE + and the pin SENSE-are connected with two ends of a 50m omega resistor, the pin SENSE + is further connected with a1 muF capacitor, the other end of the 1 muF capacitor is connected with the pin GND, the pin SENSE + is connected with a pin OUT of the lithium battery charge IC, the pin SENSE-is connected with a connecting terminal J4, the J4 connecting terminal is used as the anode of a lithium battery terminal, the pin SCL of the lithium battery electricity meter IC is connected with a pin I2C1_ SCL of a main control IC, the pin I2C1_ SCL of the main control IC is connected with a 2K omega resistor, the other end of the 2K omega resistor is connected with a pin DVDD of an LDO linear voltage stabilizing unit, the pin SDA is connected with a pin I2C1_ SDA, the other end of 2K omega resistance is connected with the pin DVDD of LDO linear voltage regulation unit, and pin ALCC is connected with LED4, 2K omega's resistance, and the other end of 2K omega resistance is connected with the pin DVDD of LDO linear voltage regulation unit, and the other end of LED4 is connected with 10K omega's resistance, and the other end of 10K omega resistance is connected with the pin DVDD of LDO linear voltage regulation unit.

The utility model comprises a DC-DC boost unit, which comprises a boost IC and a boost hardware circuit contact; the boost IC is SY7069, the contact of the boost hardware circuit is provided with a pin LX, a pin IN, a pin EN, a pin GND, a pin FB and a pin OUT, the pin LX is connected with an inductor of 3.3 muH, the other end of the inductor of 3.3 muH is connected with the pin OUT of the lithium battery charging IC, the pin IN and the pin EN are connected with a capacitor of 1 muF and the other end of the inductor of 3.3 muH, the other end of the capacitor of 1 muF is connected with the pin GND, the other end of the inductor of 3.3 muH is connected with a capacitor of 22 muF and a capacitor of 100 muF, the other ends of the capacitor of 22 muF and the capacitor of 100 muF are connected with the pin GND, the pin FB and the pin OUT are connected with a resistor of 470 Komega, the pin FB is connected with a resistor of 150 Komega, the other end of the resistor of 150 KQGND is connected with the pin GND, the pin OUT is connected with, the pin OUT is connected with a 10K omega resistor, the other end of the 10K omega resistor is connected with the LED5, the other end of the LED5 is connected with the pin GND, and the pin OUT is connected with the pin IN of the 5V-5V linear voltage stabilizing IC TPS7350 of the LDO linear voltage stabilizing unit.

The utility model comprises an LDO linear voltage-stabilizing unit, which comprises a 5V-5V linear voltage-stabilizing unit and a 5V-3V3 linear voltage-stabilizing unit; the 5V-5V linear voltage stabilizing unit comprises a 5V-5V linear voltage stabilizing IC and a 5V-5V linear voltage stabilizing hardware circuit contact, the 5V-5V linear voltage stabilizing IC is TPS7350, the 5V-5V linear voltage stabilizing hardware circuit contact is provided with a pin GND, a pin IN, a pin ED, a pin RESET, a pin SENSE/FB and a pin OUT, the pin GND is connected with the pin ED, the pin IN is connected with a 10 muF capacitor, the other end of the 10 muF capacitor is connected with the pin GND, the pin OUT, the pin SENSE/FB are connected with capacitors of pins AVDDx and 10 muF of the acquisition IC, the other end of the 10 muF capacitor is connected with the pin GND, and the pin OUT, the pin SENSE/FB are connected with a pin AVDD of a connecting terminal J3;

the 5V-3V3 linear voltage-stabilizing unit comprises a 5V-3V3 linear voltage-stabilizing IC and a 5V-3V3 linear voltage-stabilizing hardware circuit contact, the 5V-3V3 linear voltage-stabilizing IC is AMS1117-3V3, the 5V-3V3 linear voltage-stabilizing hardware circuit contact is provided with a pin IN, a pin OUT, a pin DVDD and a pin GND, the pin IN is connected with the pin OUT of the 5V-5V linear voltage-stabilizing IC, the pin IN is connected with capacitors of 100nF and 10 muF, the other ends of the capacitors of 100nF and 10 muF are connected with the pin GND, the pin OUT is connected with the capacitors of 100nF and 10 muF, the other ends of the capacitors of 100nF and 10 muF are connected with the pin GND, and the pin OUT is connected with the pin DVDD of a connecting terminal J5.

The utility model discloses in, EEG signal collection system is including the EEG signal acquisition unit who gathers EEG signal, a single chip microcomputer control unit for quantizing the code to the signal of gathering, the information transmission bluetooth unit that sends the EEG signal of code, the information reception bluetooth unit that receives the signal, the lithium battery power supply unit who provides the power for the system, the lithium battery coulometer unit of monitoring lithium battery power supply unit electric quantity, the lithium battery charging unit who charges for lithium battery power supply unit, the DC-DC boost unit that steps up lithium battery power supply unit voltage, the LDO linear voltage stabilizing unit who carries out the steady voltage after stepping up again, LDO linear voltage stabilizing unit supplies power for entire system again, the OLED display element who shows basic information; through amplification, filtering, collection, quantization, coding, uploading and analysis, the electroencephalogram signals of the patients are subjected to abnormity analysis and pathological detection, and convenience is brought to medical staff.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the embodiments or the technical solutions in the prior art will be briefly described below. Throughout the drawings, like elements or portions are generally identified by like reference numerals. In the drawings, elements or portions are not necessarily drawn to scale.

Fig. 1 is a schematic structural diagram of a portable wearable electroencephalogram signal acquisition device provided by the utility model;

FIG. 2 is a schematic circuit diagram of an EEG signal acquisition unit provided by the present invention;

FIG. 3 is a schematic diagram of a filtering and reference circuit of the EEG signal acquisition unit provided by the present invention;

fig. 4 is a schematic circuit diagram of the single chip microcomputer control unit provided by the present invention;

fig. 5 is a schematic diagram of a minimum system circuit of the single chip microcomputer control unit provided by the present invention;

fig. 6 is a schematic circuit diagram of the lithium battery electricity meter unit, the DC-DC boost unit, the LDO linear voltage stabilizing unit, and the lithium battery charging unit provided by the present invention;

the device comprises an OLED display unit 1, an EEG signal acquisition unit 3, a single-chip microcomputer control unit 4, an information transmission Bluetooth unit 5, an information receiving Bluetooth unit 6, an LDO linear voltage stabilization unit 7, a lithium battery electricity meter unit 8, a DC-DC boosting unit 9, a lithium battery charging unit 10 and a lithium battery power supply unit.

Detailed Description

Embodiments of the present invention will be described in detail below with reference to the accompanying drawings. The following examples are only for illustrating the technical solutions of the present invention more clearly, and therefore are only examples, and the protection scope of the present invention is not limited thereby.

Fig. 1 shows, utility model provides an electroencephalogram signal acquisition unit structure sketch map, for the convenience of explanation, only has given in the figure with the embodiment of the utility model provides a relevant part.

The OLED display unit 1 is used for a basic window for battery power display and interpersonal interaction; the electroencephalogram signal collector comprises an electroencephalogram signal collecting unit 2; a singlechip control unit 3 for controlling the system and processing signals; an information transmission Bluetooth unit 4 for communicating with an upper computer; an information receiving Bluetooth unit 5 for the upper computer; an LDO linear voltage stabilizing unit 6 for supplying power to the system; a lithium battery electricity meter unit 7 for monitoring the electricity quantity of the lithium battery; a DC-DC boosting unit 8 for boosting the voltage of the lithium battery; a lithium battery charging unit 9 for charging the lithium battery and a lithium battery power supply unit 10 for supplying the system with electric energy.

The electroencephalogram signal acquisition unit comprises an acquisition IC (integrated circuit) ADS1299, an external reference IC LM4140ACM-1.0/NOPB, a hardware circuit contact is provided with a pin DVDD, a pin AVDDx, a pin AVSSx, a pin VREFP, a pin VREFN, a pin CLKSEL, a pin DRDY, a pin DOUT, a pin SCLK, a pin CS, a pin START, a pin RESET, a pin PWDN, a pin DIN, a pin INxN, a pin INxP, a pin SRB1, a pin VCAP1, a pin VCAP2, a pin VCAP3, a pin VCAP4, a pin RESRVED, a pin BIASOUT, a pin BIASINV and a pin AGND, and the external reference hardware circuit contact is provided with a pin GND, a pin VIN, a pin EN and a pin VREF;

the device comprises an electroencephalogram signal acquisition unit, a main control unit, a low voltage drop-out (LDO) unit, a low voltage drop-out (VCAP) unit, a power supply unit (VCAP) unit (VCAP 39 2), a power supply unit (VCAP) unit (VCAP unit) unit (VCDD unit) unit, a power supply unit (VCAD unit) unit (VCDD unit), a power supply unit (AVDDD unit), The pin PWDN, the pin RESET, the pin START, the pin DOUT, the pin SCLK, the pin CS and the pin DIN are respectively connected with a pin PB0, a pin PB13, a pin PB12, a pin PB1, a pin PA6, a pin PA5, a pin PA4 and a pin PA7 of the main control IC, the pin SRB1 is connected with a connecting terminal P5, the other ends of the pin INxN, the pin InxP and the resistor Rp and the pin SRB1 are respectively connected with a low pass filter consisting of a resistor of 4.99K omega and a capacitor of 4.7nF through a connecting terminal P5, the interface is respectively led to the connecting terminals P1 and P3, the pin VCREFP of the acquisition IC is connected with the capacitors of 10 muF and 0.1 muF, the pin EFVRN is connected with the other ends of the capacitors of 10 muF and 0.1 muF, a resistor string of 0.0 string is arranged between the pin AGND and the pin of the external reference pin EN, the pin LDEN and the pin of the linear voltage stabilizing unit are connected with the capacitor VIN of the pin DVEN and the, the other end of the 1 mu F capacitor is connected with a pin AGND, the pin GND is connected with the pin AGND, a pin VREF is connected with the 1 mu F capacitor, the other end of the 1 mu F capacitor is connected with the pin AGND, and the pin VREF is connected with a contact pin VREFP of the acquisition hardware circuit;

the single chip microcomputer control unit comprises an STM32F103C8T6 as a main control IC, and the control hardware circuit contacts are provided with a pin OSCIN, a pin OSCOUT, a pin NRST, a pin VSSA, a pin VDDA, a pin I2C1_ SDA, a pin I2C1_ SCL, a pin I2C2_ SDA, a pin I2C2_ SCL, a pin SWCLK, a pin 5V, a pin DVDD, a pin SWDIO, a pin USART1_ RXD, a pin USART1_ TXD, a pin USART2_ RXD, a pin USART2_ TXD, a pin PWDN, a pin RESET, a pin START, a pin DADY, a pin GND, a pin 1, a pin PB15, a pin 14, a pin 13, a pin 12, a pin PB1, a pin PB0, a pin 11, a pin 12, a pin 6, a pin 5, a pin PA 2, a pin 4656, a pin VSS, a pin 13, a pin 8253, a pin 0, a pin 828653, a pin 0; pin OSCIN and pin OSCOUT of the control hardware circuit contact of the single chip microcomputer control unit are connected to the two ends of the 1M omega resistor and the 8MHz crystal oscillator respectively, the two ends of the 8MHz crystal oscillator are connected to the 20pF capacitor respectively, the other end of the 20pF capacitor is connected to pin GND, pin NRST is connected to the 10K omega resistor, the 1 uf capacitor and the key switch, the other end of the 10K omega resistor is connected to pin DVDD of the LDO linear regulator unit, the other ends of the 1 uf capacitor and the key switch are connected to pin GND, pin VSSA and pin VDDA are connected to the 10nF and 1 uf capacitors respectively, pin AVDD of the LDO linear regulator unit is connected to pin VDDA, pin VSSA is connected to pin GND, pin BOOT1 is connected to pin GND, pin BOOT 8, pin BOOT0 is connected to pin 10K omega resistor, the other end of 10K resistor is connected to terminal P8, pin VSS _1 is connected to pin GND, pin VDD _1, pin VDD _2, and pin VDD _3 are all connected to pin DVDD of the LDO linear voltage regulator unit, pin VSS _2 is connected to pin 5V, pin PB15 and pin PB14 are connected to 10K Ω resistors, the other ends of the two 10K Ω resistors are connected to two LEDs 1 and LED2, the other ends of LED1 and LED2 are connected to pin DVDD of the LDO linear voltage regulator unit, pin I2C2_ SDA, pin I2C2_ SCL, pin DVDD, pin GND is connected to terminal P9, pin USART2_ RXDD, pin USART2_ TXD, pin GND, pin DVDD of the LDO linear voltage regulator unit is connected to terminal P10, pin PA11 is connected to 10K USB resistor, the other end of the resistor is connected to pin 12, and one of the other ends of the pins is connected to USB resistor, the other end of the 10K omega resistor is connected with AVDD +5V of a USB connecting terminal, a pin DVDD, a pin SWDIO, a pin SWCLK and a pin GND of the LDO linear voltage stabilizing unit are connected with a connecting terminal P11, the pin DVDD and the pin GND of the LDO linear voltage stabilizing unit are connected by a capacitor of 1 muF, a pin I2C2_ SDA, a pin I2C2_ SCL, the pin DVDD and the pin GND of the LDO linear voltage stabilizing unit are connected with a connecting terminal P9, the connecting terminal P9 is used for being connected with an OLED display unit, a pin USART2_ RXD, a pin USART2_ TXD, the pin GND and the pin DVDD of the LDO linear voltage stabilizing unit are connected with a connecting terminal P10, and the connecting terminal P10 is used for being connected with an information transmission Bluetooth.

The lithium battery charging unit comprises a lithium battery charging IC and a charging hardware circuit contact; the lithium battery charging unit comprises a lithium battery charging IC (integrated circuit) of BQ2100DBVR, a charging hardware circuit contact is provided with a pin TS, a pin OUT, a pin CHG, a pin VIN, a pin GND and a pin ISET, the pin TS is connected with a 103AT NTC thermistor, the pin CHG is connected with a 1.5K omega resistor, the other ends of the 103AT NTC thermistor and the 1.5K omega resistor are connected with an LED3, the other end of the LED3 is connected with the pin GND, the pin ISET is connected with the 1K omega resistor, the other end of the 1K omega resistor is connected with the pin GND, the pin VIN is connected with a1 muF capacitor, the other end of the 1 muF capacitor is connected with the pin GND, the pin VIN is connected with AVDD +5V of a USB connecting terminal, a connecting terminal J6 is connected with a connecting terminal of the GND, the pin OUT is connected with the 1 muF capacitor, the other end of the 1 muF, The capacitance of 1 muF is connected to the capacitance of 100 muF.

The lithium battery electricity meter unit comprises a lithium battery electricity meter IC and a lithium battery electricity meter hardware circuit contact; wherein, the lithium battery electricity meter IC is LTC2944, the hardware circuit contact of the lithium battery electricity meter is provided with a pin SENSE +, a pin SENSE-, a pin GND, a pin SCL, a pin SDA, a pin ALCC, a pin SENSE +, a pin SENSE-and a 50m omega resistor, the pin SENSE + is connected with a1 muF capacitor, the other end of the 1 muF capacitor is connected with the pin GND, the pin SENSE + is connected with a pin OUT of the lithium battery charging IC, the pin SENSE-is connected with a connecting terminal J4, the J4 connecting terminal is used as the anode of a lithium battery terminal, the pin SCL of the lithium battery electricity meter IC is connected with a pin I2C1_ SCL of the main control IC, the pin I2C1_ SCL of the main control IC is connected with a 2K omega resistor, the other end of the 2K omega resistor is connected with a pin DD of the LDO linear voltage stabilizing unit, the pin DVDD is connected with a pin SDA 2C1_ SDA of the main control IC, and the pin, the other end of 2K omega resistance is connected with the pin DVDD of LDO linear voltage regulation unit, and pin ALCC is connected with LED4, 2K omega's resistance, and the other end of 2K omega resistance is connected with the pin DVDD of LDO linear voltage regulation unit, and the other end of LED4 is connected with 10K omega's resistance, and the other end of 10K omega resistance is connected with the pin DVDD of LDO linear voltage regulation unit.

The DC-DC boosting unit comprises a boosting IC and a boosting hardware circuit contact; wherein, the boost IC is SY7069, the contact of the boost hardware circuit is provided with a pin LX, a pin IN, a pin EN, a pin GND, a pin FB and a pin OUT, the pin LX is connected with an inductor of 3.3 muH, the other end of the inductor of 3.3 muH is connected with the pin OUT of the lithium battery charging IC, the pin IN and the pin EN are connected with a capacitor of 1 muF and the other end of the inductor of 3.3 muH, the other end of the capacitor of 1 muF is connected with the pin GND, the other end of the inductor of 3.3 muH is connected with a capacitor of 22 muF and a capacitor of 100 muF, the other ends of the capacitor of 22 muF and the capacitor of 100 muF are connected with the pin GND, the pin FB and the pin OUT are connected with a resistor of 470 Komega, the pin FB is connected with a resistor of 150 Komega, the other end of the resistor of 150 Komega is connected with the pin GND, the pin OUT is connected with a capacitor, the pin OUT is connected with a 10K omega resistor, the other end of the 10K omega resistor is connected with the LED5, the other end of the LED5 is connected with the pin GND, and the pin OUT is connected with the pin IN of the 5V-5V linear voltage stabilizing IC TPS7350 of the LDO linear voltage stabilizing unit.

The 5V-5V linear voltage stabilizing unit comprises a 5V-5V linear voltage stabilizing IC and a 5V-5V linear voltage stabilizing hardware circuit contact, the 5V-5V linear voltage stabilizing IC is TPS7350, the 5V-5V linear voltage stabilizing hardware circuit contact is provided with a pin GND, a pin IN, a pin ED, a pin RESET, a pin SENSE/FB and a pin OUT, the pin GND is connected with the pin ED, the pin IN is connected with a 10 muF capacitor, the other end of the 10 muF capacitor is connected with the pin GND, the pin OUT, the pin SENSE/FB are connected with the pins AVDDx and AVDD of the acquisition IC, the other end of the 10 muF capacitor is connected with the pin GND, and the pin OUT, the pin SENSE/FB are connected with the pin AVDD of a connection terminal J3;

The single chip microcomputer IC is communicated with the ADS1299 through an SPI protocol, an analog signal is converted into a digital signal by the front end of the ADS1299, the acquired semaphore is output in a digital form through calculation according to sampling, quantization and coding of a sampling theorem, the acquired signal is further subjected to digital signal processing in the single chip microcomputer, and the signal is optimized through a digital low-pass filter algorithm; the single chip microcomputer also provides various protocol interfaces such as USART and I2C through programs, and conditions are provided for function expansion and secondary development; the high-precision analog-digital converter ADS1299 is a 24-bit high-precision analog-digital conversion IC, and the reference voltage of the high-precision analog-digital converter ADS1299 is controlled to be 1.024V by the high-precision LDO linear voltage stabilization IC, so that the resolution of a weak model is greatly improved, and electroencephalogram signal data are more accurately acquired and analyzed; the single chip microcomputer displays the electric quantity information of the lithium battery and the working state of the electroencephalogram signal collector in real time through the OLED display, so that effective and reasonable prompts are provided for basic man-machine interaction.

In the utility model, in the design, the STM32F103C8T6 single chip microcomputer 3 system is initialized; and initializing and configuring the ADS1299 electroencephalogram signal acquisition unit 2, the OLED display unit 1 and the information transmission Bluetooth unit 4 to enable signal acquisition to enter a real-time acquisition state. The main program carries out information transmission with the lithium battery electricity meter unit through an I2C protocol, and the service condition of the battery is displayed on the OLED display unit in real time.

In the utility model, the EEG signal acquisition unit 2 is connected with the single chip microcomputer control unit 3, the single chip microcomputer control unit 3 is connected with the information transmission Bluetooth unit 4, the information transmission Bluetooth unit 4 is communicated with an information receiving Bluetooth unit 5 attached to an upper computer through a Bluetooth protocol, the LDO linear voltage-stabilizing unit 6 is respectively connected with the electroencephalogram signal acquisition unit 2, the singlechip control unit 3 and the information transmission Bluetooth unit 4 to supply power to the electroencephalogram signal acquisition unit, the lithium battery power supply unit 10 is connected with the lithium battery electricity meter unit 7, the lithium battery electricity meter unit 10 is connected with the lithium battery charging unit 9, the lithium battery charging unit 9 boosts the voltage with the DC-DC boosting unit 8 through the lithium battery charging unit, the DC-DC boosting unit 8 is connected with the LDO linear voltage stabilizing unit 6 to provide continuous power supply for the LDO linear voltage stabilizing unit.

The above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; although the present invention has been described in detail with reference to the foregoing embodiments, it should be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; such modifications and substitutions do not substantially depart from the scope of the embodiments of the present invention, and are intended to be covered by the claims and the specification.

Claims

1. A portable wearable electroencephalogram signal acquisition device is characterized by comprising an electroencephalogram signal acquisition unit for acquiring electroencephalogram signals, a single-chip microcomputer control unit for quantizing and coding the acquired signals, an information transmission Bluetooth unit for sending the coded electroencephalogram signals, an information receiving Bluetooth unit for receiving the signals, a lithium battery power supply unit for providing power for a system, a lithium battery electricity meter unit for monitoring the electric quantity of the lithium battery power supply unit, a lithium battery charging unit for charging the lithium battery power supply unit, a DC-DC boosting unit for boosting the voltage of the lithium battery power supply unit, an LDO linear voltage stabilizing unit for stabilizing the voltage after boosting, an LDO linear voltage stabilizing unit for supplying power for the whole system again, and an OLED display unit for displaying basic information;

2. The portable wearable electroencephalogram signal acquisition device according to claim 1, wherein the information receiving Bluetooth unit is used for carrying out information communication between the upper computer and the hardware circuit through a Bluetooth protocol and a hardware circuit information transmission Bluetooth unit.

3. The portable wearable electroencephalogram signal acquisition device according to claim 1, wherein the electroencephalogram signal acquisition unit comprises an acquisition IC, an external reference IC, an acquisition hardware circuit contact and an external reference hardware circuit contact, and the single-chip microcomputer control unit comprises a master control IC and a control hardware circuit contact;

the single chip microcomputer control unit comprises an STM32F103C8T6 as a main control IC, and the control hardware circuit contacts are provided with a pin OSCIN, a pin OSCOUT, a pin NRST, a pin VSSA, a pin VDDA, a pin I2C1_ SDA, a pin I2C1_ SCL, a pin I2C2_ SDA, a pin I2C2_ SCL, a pin SWCLK, a pin 5V, a pin DVDD, a pin SWDIO, a pin USART1_ RXD, a pin USART1_ TXD, a pin USART2_ RXD, a pin USART2_ TXD, a pin PWDN, a pin RESET, a pin START, a pin DADY, a pin GND, a pin 1, a pin PB15, a pin 14, a pin 13, a pin 12, a pin PB1, a pin PB0, a pin 11, a pin 12, a pin 6, a pin 5, a pin PA 2, a pin 4656, a pin VSS, a pin 13, a pin 8253, a pin 0, a pin 828653, a pin 0;

the device comprises an electroencephalogram signal acquisition unit, a main control unit, a low voltage drop-out (LDD) unit, a low voltage drop-out (LDO) unit, a low voltage drop-out (VCAP) unit, a power supply unit (VCAP) unit (VCAP 39 2), a power supply unit (VCAP) unit (VCAP unit) unit (VCDD unit) unit, a power supply unit (VCPD), a power supply unit (DRDN) unit (DRSEL unit), a power supply unit (DRSEL, Pin START, pin DOUT, pin SCLK, pin CS, pin DIN are connected to pin PB0, pin PB13, pin PB12, pin PB1, pin PA6, pin PA5, pin PA4, pin PA7 of the main control IC, pin SRB1 is connected to terminal P5, pin INxN, pin InxP, the other end of resistor Rp, pin SRB1 are connected to a low pass filter composed of 4.99K Ω resistor and 4.7nF capacitor through terminal P5, and then the interface is led to terminal P1 and P3, pin VCREFP of the collection IC is connected to 10 μ F and 0.1 μ F capacitors, pin VREFN is connected to 10 μ F and 0.1 μ F capacitors, pin GND and pin agvin are connected in series to a 0 Ω resistor, pin of the external reference IC, pin LDO is connected to pin DVDD and pin 1 μ F capacitors of the linear regulator, pin EN and pin dd are connected to pin agvin, a pin GND is connected with a pin AGND, a pin VREF is connected with a1 muF capacitor, the other end of the 1 muF capacitor is connected with the pin AGND, and the pin VREF is connected with a collection hardware circuit contact pin VREFP;

wherein, the pin OSCIN and the pin OSCOUT of the control hardware circuit contact of the single chip microcomputer control unit are respectively connected with two ends of a 1M omega resistor and a 8MHz crystal oscillator, two ends of the 8MHz crystal oscillator are respectively connected with a 20pF capacitor, the other end of the 20pF capacitor is connected with a pin GND, a pin NRST is connected with a 10K omega resistor, a1 muF capacitor and a key switch, the other end of the 10K omega resistor is connected with a pin DVDD of the LDO linear voltage stabilizing unit, the other ends of the 1 muF capacitor and the key switch are connected with a pin GND, a pin VSSA and a pin VDDA are respectively connected with a 10nF capacitor and a1 muF capacitor, a pin AVDD of the LDO linear voltage stabilizing unit is connected with a pin VDDA, a pin VSSA is connected with the pin GND, a pin BOOT1 is connected with the 10K omega resistor, the other end of the 10K omega resistor is connected with a terminal P8, a pin BOOT0 is connected, the other end of the 10K omega resistor is connected with a connecting terminal P8, a pin VSS _1 is connected with a pin GND, the pin VDD _1, the pin VDD _2 and the pin VDD _3 are all connected with a pin DVDD of the LDO linear voltage stabilizing unit, the pin VSS _2 is connected with a pin 5V, the pin PB15 and the pin PB14 are respectively connected with 10K omega resistors, the other ends of the two 10K omega resistors are respectively connected with two LEDs 1 and LED2, the other ends of the LEDs 1 and LED2 are connected with the pin DVDD of the LDO linear voltage stabilizing unit, the pin I2C2_ SDA, the pin I2C2_ SCL, the pin DVDD and the pin GND are connected with a connecting terminal P9, the pin USART2_ RXDD, the pin USART2_ TXD, the pin and the pin DVDD of the LDO linear voltage stabilizing unit are connected with the connecting terminal P10, the pin PA11 is connected with a 10K omega resistor, the other end of the pin PA12 is connected with a USB connecting terminal P10K omega resistor, the other end of the 10K omega resistor is connected with AVDD +5V of a USB connecting terminal, a pin DVDD, a pin SWDIO, a pin SWCLK and a pin GND of the LDO linear voltage stabilizing unit are connected with a connecting terminal P11, the pin DVDD and the pin GND of the LDO linear voltage stabilizing unit are connected with a capacitor of 1 muF, a pin I2C2_ SDA, a pin I2C2_ SCL, the pin DVDD and the pin GND of the LDO linear voltage stabilizing unit are connected with a connecting terminal P9, the connecting terminal P9 is used for being connected with an OLED display unit, a pin USART2_ RXD, a pin USART2_ TXD, the pin GND and the pin DVDD of the LDO linear voltage stabilizing unit are connected with a connecting terminal P10, and the connecting terminal P10 is used for being connected with an information transmission.

4. The portable wearable electroencephalogram signal acquisition device according to claim 1, wherein the lithium battery charging unit comprises a lithium battery charging IC and charging hardware circuit contacts;

the lithium battery charging unit comprises a lithium battery charging IC (integrated circuit) of BQ2100DBVR, a charging hardware circuit contact is provided with a pin TS, a pin OUT, a pin CHG, a pin VIN, a pin GND and a pin ISET, the pin TS is connected with a 103AT NTC thermistor, the pin CHG is connected with a 1.5K omega resistor, the other ends of the 103AT NTC thermistor and the 1.5K omega resistor are connected with an LED3, the other end of the LED3 is connected with the pin GND, the pin ISET is connected with the 1K omega resistor, the other end of the 1K omega resistor is connected with the pin GND, the pin VIN is connected with a1 muF capacitor, the other end of the 1 muF capacitor is connected with the pin GND, the pin VIN is connected with AVDD +5V of a USB connecting terminal, a connecting terminal J6 is connected with a connecting terminal of the GND, the pin OUT is connected with the 1 muF capacitor, the other end of the 1 muF, The capacitance of 1 muF is connected to the capacitance of 100 muF.

5. The portable wearable electroencephalogram signal acquisition device according to claim 1, wherein the lithium battery coulometer unit comprises a lithium battery coulometer IC and lithium battery coulometer hardware circuit contacts;

wherein, the lithium battery electricity meter IC is LTC2944, the hardware circuit contact of the lithium battery electricity meter is provided with a pin SENSE +, a pin SENSE-, a pin GND, a pin SCL, a pin SDA, a pin ALCC, a pin SENSE +, a pin SENSE-and a 50m omega resistor, the pin SENSE + is connected with a1 muF capacitor, the other end of the 1 muF capacitor is connected with the pin GND, the pin SENSE + is connected with a pin OUT of the lithium battery charging IC, the pin SENSE-is connected with a connecting terminal J4, the J4 connecting terminal is used as the anode of a lithium battery terminal, the pin SCL of the lithium battery electricity meter IC is connected with a pin I2C1_ SCL of the main control IC, the pin I2C1_ SCL of the main control IC is connected with a 2K omega resistor, the other end of the 2K omega resistor is connected with a pin DD of the LDO linear voltage stabilizing unit, the pin DVDD is connected with a pin SDA 2C1_ SDA of the main control IC, and the pin, the other end of 2K omega resistance is connected with the pin DVDD of LDO linear voltage regulation unit, and pin ALCC is connected with LED4, 2K omega's resistance, and the other end of 2K omega resistance is connected with the pin DVDD of LDO linear voltage regulation unit, and the other end of LED4 is connected with 10K omega's resistance, and the other end of 10K omega resistance is connected with the pin DVDD of LDO linear voltage regulation unit.

6. The portable wearable electroencephalogram signal acquisition device according to claim 1, wherein the DC-DC boosting unit comprises a boosting IC and a boosting hardware circuit contact;

wherein, the boost IC is SY7069, the contact of the boost hardware circuit is provided with a pin LX, a pin IN, a pin EN, a pin GND, a pin FB and a pin OUT, the pin LX is connected with an inductor of 3.3 muH, the other end of the inductor of 3.3 muH is connected with the pin OUT of the lithium battery charging IC, the pin IN and the pin EN are connected with a capacitor of 1 muF and the other end of the inductor of 3.3 muH, the other end of the capacitor of 1 muF is connected with the pin GND, the other end of the inductor of 3.3 muH is connected with a capacitor of 22 muF and a capacitor of 100 muF, the other ends of the capacitor of 22 muF and the capacitor of 100 muF are connected with the pin GND, the pin FB and the pin OUT are connected with a resistor of 470 Komega, the pin FB is connected with a resistor of 150 Komega, the other end of the resistor of 150 Komega is connected with the pin GND, the pin OUT is connected with a capacitor, the pin OUT is connected with a 10K omega resistor, the other end of the 10K omega resistor is connected with the LED5, the other end of the LED5 is connected with the pin GND, and the pin OUT is connected with the pin IN of the 5V-5V linear voltage stabilizing IC TPS7350 of the LDO linear voltage stabilizing unit.

7. The portable wearable electroencephalogram signal acquisition device according to claim 1, wherein the LDO linear voltage regulation unit comprises a 5V-5V linear voltage regulation unit, a 5V-3V3 linear voltage regulation unit;