CN107595284B - Myoelectric sensor system based on wireless charging and energy self-collection technology - Google Patents
Myoelectric sensor system based on wireless charging and energy self-collection technology Download PDFInfo
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- 230000003183 myoelectrical effect Effects 0.000 title claims abstract description 25
- 238000005516 engineering process Methods 0.000 title claims abstract description 19
- 238000012544 monitoring process Methods 0.000 claims description 16
- 239000013078 crystal Substances 0.000 claims description 6
- 210000003205 muscle Anatomy 0.000 claims description 6
- 239000000919 ceramic Substances 0.000 claims description 5
- 230000006698 induction Effects 0.000 claims description 5
- 238000000034 method Methods 0.000 claims description 4
- 238000012937 correction Methods 0.000 claims description 3
- 238000007599 discharging Methods 0.000 claims description 3
- 230000005674 electromagnetic induction Effects 0.000 claims description 3
- 230000000087 stabilizing effect Effects 0.000 claims description 3
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 claims description 2
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- 229910052744 lithium Inorganic materials 0.000 claims description 2
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- 230000007613 environmental effect Effects 0.000 abstract description 3
- 238000010586 diagram Methods 0.000 description 11
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- 230000004048 modification Effects 0.000 description 2
- 230000006399 behavior Effects 0.000 description 1
- 238000013178 mathematical model Methods 0.000 description 1
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Abstract
The wearable myoelectric sensor system provided by the invention combines the technical characteristics of wireless charging, energy self-collection and the like, and can simultaneously solve the charging requirement of a user on demand and the sustainable requirement of long-time work of the system by intelligently managing the charging of the sensor system, thereby overcoming the defects of the traditional myoelectric sensor in the aspect of power supply charging management. The sensor system provides a composite charging source structure combining a wireless charging technology and an energy self-collection technology, and provides a new charging source technical strategy for the wearable myoelectric sensor. By means of the wireless charging technology, the sensor system can achieve rapid and wireless charging performance. Through the energy self-collection technology, the sensor system can utilize environmental energy to realize the performance of charging the battery for a long time, and the sustainable working performance of the system is ensured.
Description
Technical Field
The invention relates to the field of sensors, in particular to the field of novel myoelectric sensors combining wireless charging and energy self-collection technologies.
Background
With the rapid development of the Internet of things and big data age, the intelligent digitization of personal information is an emerging and popular development field. In the category of digitizing human behaviors or states, particularly in the aspects of human kinematics and dynamics, in order to better understand and analyze human information states and establish a correct mathematical model for the human information states, equipment is needed to detect and quantify various state parameters of a human body, and the wearable myoelectric sensor is one of the state parameters. The myoelectric sensor is mainly used for collecting the myoelectric signals of a human body and digitizing and quantifying the myoelectric signals for researching the human body dynamics.
Currently, the power supply for such wearable electromyographic sensor products mainly uses batteries. But the capacity of the battery is limited and it needs to be periodically charged or replaced. Conventional wearable electromyographic sensors typically use a charging cord to charge an embedded battery. Newer myoelectric sensors use wireless charging methods to charge the system battery, but both suffer from the problem that the user needs to charge the system frequently, which can cause great inconvenience to the user in the use experience of the system. Therefore, how to solve the intelligent charging and sustainable operability of the wearable sensor device, improving the user experience becomes a key topic.
The wearable myoelectric sensor system provided by the invention combines the technical characteristics of wireless charging, energy self-collection and the like, and can simultaneously solve the charging requirement of a user on demand and the sustainable requirement of long-time work of the system by intelligently managing the charging of the sensor system, thereby overcoming the defects of the traditional myoelectric sensor in the aspect of power supply charging management.
Disclosure of Invention
The invention provides a myoelectric sensor system based on wireless charging and energy self-collection technology, which aims to overcome the defects of the prior art.
In order to solve the technical problems, the basic technical scheme provided by the invention is as follows:
the myoelectric sensor system based on the wireless charging and energy self-collection technology is characterized by comprising a battery charger module, a wireless charging module, an energy self-collection module, a myoelectric signal module, a battery monitoring module, a charging source intelligent switching module, a microcontroller and a Bluetooth module;
the battery charger module controls the charging voltage and current of the battery through the battery charging chip, and simultaneously, the battery charger module is combined with the battery monitoring module to realize real-time monitoring and management on the residual capacity of the battery and the current discharging current parameters;
the wireless charging module utilizes a wireless charging receiver chip to integrate the induction current from the electric coil and provide a stable voltage source for battery charging;
the energy self-collection module collects energy from a solar light plate, piezoelectric ceramics, heat energy and the like through a booster chip, converts the energy into electric energy, and outputs the electric energy to a battery for charging;
the myoelectric signal module amplifies and filters weak bioelectric signals of human muscles to obtain state information of the muscles excited in the movement process;
the intelligent charging source switching module mainly manages the selection of charging sources, so that the system can be automatically switched under various charging sources;
the microcontroller performs overall control on the modules, performs calibration and correction on the collected myoelectricity data, and then sends the processed data to the upper main control computer for real-time display, analysis and storage through the Bluetooth module.
The beneficial effects of the invention are as follows: the sensor system provides a composite charging source structure combining a wireless charging technology and an energy self-collection technology, and provides a new charging source technical strategy for the wearable myoelectric sensor. By means of the wireless charging technology, the sensor system can achieve rapid and wireless charging performance. Through the energy self-collection technology, the sensor system can utilize environmental energy to realize the performance of charging the battery for a long time, and the sustainable working performance of the system is ensured.
Drawings
FIG. 1 is a schematic diagram of the overall structure of the system of the present invention
Fig. 2 is a circuit diagram of a battery charger module of the present invention
FIG. 3 is a circuit diagram of a wireless charging module according to the present invention
FIG. 4 is a circuit diagram of the energy self-harvesting module of the present invention
FIG. 5 is a circuit diagram of the intelligent switching module of the charging source of the present invention
FIG. 6 is a circuit diagram of a battery monitoring module according to the present invention
FIG. 7 is a circuit diagram of a microcontroller according to the present invention
FIG. 8 is a circuit diagram of an electromyographic signal module of the invention
Fig. 9 is a circuit diagram of a bluetooth module according to the present invention
FIG. 10 is a system frame diagram of the present invention
Detailed Description
The present invention will be further described with reference to fig. 1 to 9, but the scope of the present invention should not be limited thereto. For the convenience of description and understanding of the technical solution of the present invention, the azimuth terms used in the following description are all based on the azimuth shown in the drawings.
Referring to fig. 1, a schematic diagram of the overall structure of a system according to the present invention is shown, in which a myoelectric sensor system based on wireless charging and energy self-collection technology is provided, the system includes a battery charger module, a wireless charging module, an energy self-collection module, a myoelectric signal module, a battery monitoring module, a charging source intelligent switching module, a microcontroller and a bluetooth module;
as shown in fig. 2, the main components of the battery charger module in fig. 2 are U12: the charging chip is used for realizing control of charging voltage and current; PL2: and the battery connector is used for connecting a lithium battery. The main input and output signals are as follows: wireless_out, out_batt; the main working principle is as follows: u12 receives the output wireless_OUT from the Wireless charging module as a charging energy source, and then outputs a stable charging voltage OUT_BATT to the battery connector PL2 to finish charging the battery.
The battery charger module controls the charging voltage and current of the battery through the battery charging chip, and simultaneously the battery charger module is combined with the battery monitoring module to realize real-time monitoring and management on the residual electric quantity and the current discharging current parameters of the battery;
as shown in fig. 3, the main components of the wireless charging module in fig. 3 are U11, a wireless charging receiver chip; PL1 electrical coil. The module mainly inputs and outputs signals: wireless_out; the wireless charging module utilizes a wireless charging receiver chip to integrate the induction current from the electric coil, and provides a stable voltage source for battery charging, and the main working principle is as follows: PL1 receives electromagnetic induction energy from the Wireless charging base and outputs it to U11, U11 integrates the induction current into a stable voltage output wireless_out and then to U12 of the battery charger module, providing input power to the charging chip. Meanwhile, the output wireless_out of the U11 is connected to the high-power triode logic circuit T1 of the charging source intelligent switching module, so that the charging source intelligent switching module can select a charging source.
As shown in fig. 4, the main components of the energy self-collection module in fig. 4 are U14, booster chip; PL3, solar light plate/heat energy collecting element/piezoelectric ceramic element, etc., the module mainly inputs and outputs signals: harv_out; the booster chip is used for collecting energy from a solar light plate, piezoelectric ceramics, heat energy and the like, converting the energy into electric energy and outputting the electric energy to the battery for charging; the main working principle is as follows: PL3 gathers solar energy/heat energy/piezoelectric energy, converts it into the electric energy and gives U14, and U14 carries OUT the integration processing that steps up with the electric current that gathers, and output Harv_OUT is connected to the intelligent switching module of charging source to supply the intelligent switching module of charging source to select the source of charging.
As shown in FIG. 5, the main components of the intelligent switching module of the charging source in FIG. 5 are T1, a high-power triode; the system manages the selection of charging sources, so that the system can be automatically switched under various charging sources; the module mainly inputs and outputs signals: out_batt, wireless_out, harv_out, ALM; the main working principle is as follows: t1 receives the Wireless_OUT signal from the Wireless charging module and the Harv_OUT signal of the energy self-harvesting module. And through logic judgment, the wireless charging mode and the energy self-collection charging mode are automatically switched. When the wireless charging source and the energy self-collecting charging source are simultaneously connected to the system, the wireless charging source is set to have higher priority. In the Wireless charging mode, T1 will be open to connect the wireless_OUT signal and the OUT_BATT signal. In the energy self-harvesting charging mode, T1 is open to connect the Harv_OUT signal and the OUT_BATT signal. T1 judges an ALM signal from the battery monitoring module for over-discharge protection control.
As shown in FIG. 6, the main components of the battery monitoring module circuit in FIG. 6 are U13, a battery management chip. The module mainly inputs and outputs signals: out_batt, i2c1_scl, i2c1_sda, ALM. The main working principle is as follows: the U13 communicates with the microcontroller using the i2c1_scl and i2c1_sda signal lines to exchange battery status data. U13 is connected with the battery through the OUT_BATT signal, and acquires battery parameter information such as electric quantity, voltage, current and the like. The ALM signal of U13 is output to the charge source intelligent switching module to provide the overdischarge protection signal.
As shown in fig. 7, the main elements of the microcontroller circuit in fig. 7 are:
u9 voltage stabilizing chip
U10: STM32Cortex-M3 microcontroller
LED1: trichromatic LED
Crystal oscillator Y1
The module mainly inputs and outputs signals:
USART2_RTS
USART2_TX
USART2_RX
USART2_CTS
BT_RESET#
BT_GPIO4
BT_GPIO3
BT_GPIO1
OSC32_IN
I2C1_SCL
I2C1_SDA
ALM
AA_SDN/
AA_CLK
EMG_AA
EMG_SIG
OUT_BATT
the microcontroller performs overall control on each module of the sensor system, performs calibration and correction on the collected myoelectricity data, and then sends the processed data to the upper main control computer for real-time display, analysis and storage through the Bluetooth module.
The main working principle of the microcontroller is as follows: y1 is the crystal vibration source of U10. The LED1 is mainly a system status display lamp. U9 stabilizes the voltage signal out_batt from the battery to the voltage value required by U10. U10 communicates with the Bluetooth module and related parameter settings via USART2_RTS, USART2_TX, USART2_RX, USART2_CTS, BT_RESET#, BT_GPIO4, BT_GPIO3, BT_GPIO1, OSC32_IN signals. U10 communicates with the battery monitoring module and sets parameters through I2C1_SCL, I2C1_SDA and ALM signals. U10 communicates with the electromyographic signal module and sets parameters through AA_SDN/, AA_CLK, EMG_AA and EMG_SIG signals.
As shown in fig. 8, the main elements of the electromyographic signal module circuit in fig. 8 are:
u5 and U7 amplifying circuit chip
U6: filtering chip
U8: reference voltage chip
E1 E2, E3 surface electrode
The module mainly inputs and outputs signals: aa_sdn/, aa_clk, emg_aa, emg_sig
The myoelectric signal module circuit amplifies and filters weak bioelectric signals of human muscles to acquire state information of the muscles excited in the movement process; the main working principle is as follows: the electromyographic signal module communicates and exchanges data with the microcontroller through aa_sdn/, aa_clk, emg_aa, emg_sig signals. The surface electromyographic signals are collected by the E1, E2 and E3 electrodes. And U5, amplifying the weak electromyographic signals acquired by the electrodes by the U7, and outputting the signals to the U6. And U6, filtering and shaping the amplified electromyographic signals, and outputting the amplified electromyographic signals to the microcontroller module. U8 provides a reference voltage for U5.
As shown in fig. 9, the main elements of the bluetooth module circuit in fig. 9:
u2: bluetooth chip
U1: crystal oscillator chip
U4, U3: level conversion chip
The main input and output signals of the module are as follows: usart2_rts, usart2_tx, usart2_rx, usart2_cts, bt_reset#, bt_gpio4, bt_gpio3, bt_gpio1, osc32_in
The main working principle of the module is as follows: the Bluetooth module communicates and exchanges data with the microcontroller via USART2_RTS, USART2_TX, USART2_RX, USART2_CTS, BT_RESET#, BT_GPIO4, BT_GPIO3, BT_GPIO1, OSC32_IN signals. U2 level converts bt_tx and bt_rts to usart2_rx and usart2_cts signals via U3 and U4.
The beneficial effects of the invention are as follows: the sensor system provides a composite charging source structure combining a wireless charging technology and an energy self-collection technology, and provides a new charging source technical strategy for the wearable myoelectric sensor. By means of the wireless charging technology, the sensor system can achieve rapid and wireless charging performance. Through the energy self-collection technology, the sensor system can utilize environmental energy to realize the performance of charging the battery for a long time, and the sustainable working performance of the system is ensured.
Variations and modifications to the above would be obvious to persons skilled in the art to which the invention pertains from the foregoing description and teachings. Therefore, the invention is not limited to the specific embodiments disclosed and described above, but some modifications and changes of the invention should be also included in the scope of the claims of the invention. In addition, although specific terms are used in the present specification, these terms are for convenience of description only and do not limit the present invention in any way.
Claims (1)
1. The myoelectric sensor system based on the wireless charging and energy self-collection technology is characterized by comprising a battery charger module, a wireless charging module, an energy self-collection module, a myoelectric signal module, a battery monitoring module, a charging source intelligent switching module, a microcontroller and a Bluetooth module;
the battery charger module controls the charging voltage and current of the battery through the battery charging chip, and simultaneously, the battery charger module is combined with the battery monitoring module to realize real-time monitoring and management on the residual capacity of the battery and the current discharging current parameters;
the wireless charging module utilizes a wireless charging receiver chip to integrate the induction current from the electric coil and provide a stable voltage source for battery charging;
the energy self-collection module collects energy from a solar light plate, piezoelectric ceramics and heat energy through a booster chip, converts the energy into electric energy, and outputs the electric energy to a battery for charging;
the myoelectric signal module amplifies and filters weak bioelectric signals of human muscles to obtain state information of the muscles excited in the movement process;
the intelligent charging source switching module manages the selection of charging sources, so that the system can be automatically switched under various charging sources;
the microcontroller performs overall control on the modules and calibration and correction on the collected myoelectricity data, and then sends the processed data to an upper main control computer for real-time display, analysis and storage through a Bluetooth module;
wherein the battery charger module comprises: charging chip U12 and battery connector PL2; the battery connector is used for connecting a lithium battery, and the charging chip realizes control of charging voltage and current; the working principle of the module comprises: the charging chip U12 receives the output wireless_OUT from the Wireless charging module, takes the output wireless_OUT as a charging energy source, and then outputs stable charging voltage OUT_BATT to the battery connector PL2 to finish charging the battery;
wherein, wireless charging module includes: a wireless charging receiver chip U11 and an electric coil PL1; the working principle of the module comprises: the electric coil PL1 receives electromagnetic induction energy emitted from the Wireless charging base, and then outputs the electromagnetic induction energy to the Wireless charging receiver chip U11, and the U11 integrates induction current into stable voltage output wire_OUT to the U12 of the battery charger module, so as to provide input power for the charging chip; meanwhile, the output wireless_OUT of the U11 is connected to a high-power triode logic circuit T1 of the intelligent switching module of the charging source so as to enable the intelligent switching module of the charging source to select the charging source;
the self-energy collecting module comprises a booster chip U14 and a booster chip PL3, wherein the PL3 comprises one of a solar light plate, a heat energy collecting element and a piezoelectric ceramic element; the working principle of the module comprises: PL3 collects one of solar energy, heat energy and piezoelectric energy, converts the solar energy, heat energy and piezoelectric energy into electric energy for U14, the U14 carries OUT boosting integration treatment on collected current, and output Harv_OUT is connected to a charging source intelligent switching module so as to enable the charging source intelligent switching module to select a charging source;
wherein, the element of the electromyographic signal module includes: amplifying circuit chips U5 and U7, a filter chip U6, a reference voltage chip U8, and surface electrodes E1, E2 and E3; the working principle of the module comprises: the electromyographic signal module communicates and exchanges data with the microcontroller through AA_SDN/, AA_CLK, EMG_AA and EMG_SIG signals; the electromyographic signal module collects surface electromyographic signals through electrodes E1, E2 and E3, amplifies weak electromyographic signals collected by the electrodes U5 and U7 and outputs the weak electromyographic signals to U6; u6 filters and shapes the amplified electromyographic signals and outputs the amplified electromyographic signals to the microcontroller module, and U8 provides reference voltage for U5;
wherein, the circuit element of battery monitoring module includes: a battery management chip U13; the working principle of the module comprises: u13 utilizes I2C1_SCL and I2C1_SDA signal lines to communicate with the microcontroller so as to exchange battery state data, U13 is connected with a battery through an OUT_BATT signal to acquire battery parameter information such as electric quantity, voltage and current, and an ALM signal of U13 is output to a charging source intelligent switching module so as to provide an overdischarge protection signal;
wherein, the component of the intelligent switching module of the charging source includes: a high-power triode T1; the working principle of the module comprises: t1 receives a wireless_OUT signal from a Wireless charging module and a Harv_OUT signal of an energy self-collection module, and automatically switches between a Wireless charging mode and an energy self-collection charging mode through logic judgment; when the wireless charging source and the energy self-collecting charging source are simultaneously connected to the system, the wireless charging source is set to have higher priority; in the Wireless charging mode, T1 is connected with a wireless_OUT signal and an OUT_BATT signal; in an energy self-collection charging mode, T1 is connected with the Harv_OUT signal and the OUT_BATT signal; t1 judges an ALM signal from a battery monitoring module and is used for over-discharge protection control;
wherein the circuit elements of the microcontroller comprise: the three-color LED comprises a voltage stabilizing chip U9, an STM32Cortex-M3 microcontroller U10, a three-color light emitting diode LED1 and a crystal oscillator Y1; the working principle of the module comprises: y1 is a crystal source of U10, LED1 is a system state display lamp, U9 is used for stabilizing a voltage signal OUT_BATT from a battery to a voltage value required by U10, U10 is used for communicating with a Bluetooth module and setting related parameters through USART2_RTS, USART2_TX, USART2_RX, USART2_CTS, BT_RESET#, BT_GPIO4, BT_GPIO3, BT_GPIO1 and OSC32_IN signals, U10 is used for communicating with a battery monitoring module and setting parameters through I2C1_SCL, I2C1_SDA and ALM signals, and U10 is used for communicating with an electromyographic signal module and setting parameters through AA_SDN/, AA_CLK, EMG_AA and EMG_SIG signals;
wherein, the circuit component of bluetooth module includes: bluetooth chip U2, crystal oscillator chip U1, level conversion chip U4, U3; the working principle of the module comprises: the Bluetooth module communicates with the microcontroller and exchanges data with the microcontroller through USART2_RTS, USART2_TX, USART2_RX, USART2_CTS, BT_RESET#, BT_GPIO4, BT_GPIO3, BT_GPIO1 and OSC32_IN signals, and U2 converts the BT_TX and BT_RTS into USART2_RX and USART2_CTS signals through U3 and U4.
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| CN104769766A (en) * | 2012-02-17 | 2015-07-08 | 弗吉尼亚大学专利基金会以弗吉尼亚大学许可＆合资集团名义经营 | Energy harvesting and control for sensor node |
| CN105411594A (en) * | 2015-11-02 | 2016-03-23 | 广州阿路比电子科技有限公司 | Novel sensor used for collecting human motion signals |
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| US20110248846A1 (en) * | 2010-04-13 | 2011-10-13 | Green SHM Systems, Inc, Incorporated | Wireless Sensing Module and Method of Operation |
| US20160310012A1 (en) * | 2015-04-25 | 2016-10-27 | Peter MANKOWSKI | Closed-loop vital signs and energy harvesting systems using micro events for improved performance and hybrid wearable/implantable applications |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN104769766A (en) * | 2012-02-17 | 2015-07-08 | 弗吉尼亚大学专利基金会以弗吉尼亚大学许可＆合资集团名义经营 | Energy harvesting and control for sensor node |
| CN105411594A (en) * | 2015-11-02 | 2016-03-23 | 广州阿路比电子科技有限公司 | Novel sensor used for collecting human motion signals |
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