CN116466213B - Method for guaranteeing output amplitude of electrode plate of electrotherapy equipment - Google Patents
Method for guaranteeing output amplitude of electrode plate of electrotherapy equipment Download PDFInfo
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- CN116466213B CN116466213B CN202310216311.0A CN202310216311A CN116466213B CN 116466213 B CN116466213 B CN 116466213B CN 202310216311 A CN202310216311 A CN 202310216311A CN 116466213 B CN116466213 B CN 116466213B
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- 238000000034 method Methods 0.000 title claims abstract description 42
- 238000001827 electrotherapy Methods 0.000 title claims abstract description 20
- 238000004891 communication Methods 0.000 claims abstract description 19
- 230000000638 stimulation Effects 0.000 claims description 16
- 238000005070 sampling Methods 0.000 claims description 7
- 239000002184 metal Substances 0.000 claims description 6
- 238000013459 approach Methods 0.000 claims 1
- 238000004519 manufacturing process Methods 0.000 description 3
- 230000004936 stimulating effect Effects 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000001225 therapeutic effect Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 238000012790 confirmation Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 238000002560 therapeutic procedure Methods 0.000 description 1
- 230000000007 visual effect Effects 0.000 description 1
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/28—Testing of electronic circuits, e.g. by signal tracer
- G01R31/2801—Testing of printed circuits, backplanes, motherboards, hybrid circuits or carriers for multichip packages [MCP]
- G01R31/281—Specific types of tests or tests for a specific type of fault, e.g. thermal mapping, shorts testing
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/28—Testing of electronic circuits, e.g. by signal tracer
- G01R31/282—Testing of electronic circuits specially adapted for particular applications not provided for elsewhere
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- General Engineering & Computer Science (AREA)
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- Microelectronics & Electronic Packaging (AREA)
- Electrotherapy Devices (AREA)
Abstract
The method for guaranteeing the output amplitude of the electrode plate of the electrotherapy equipment adopts the following method for calibration: s1, connecting a power interface of a circuit board to be calibrated with a power supply, connecting the output of an electrode plate with a load, and connecting the circuit board with a feedback module; s2: the circuit board is connected with a power supply and establishes communication with the feedback module; s3: setting an output voltage value Uout of the electrode sheet on the display; s4: the first MCU outputs a signal Ui, and the feedback circuit acquires a voltage value Uouti on the electrode plate and transmits the voltage value Uouti to the second MCU; the second MCU adjusts the output Ui of the first MCU in a forward direction or a reverse direction according to the difference value between Uouti and Uout; s5: when the feedback modules uouti=uout are equal in the step S4, the voltage value Ui of the output signal of the first MCU corresponding to Uout is stored in the memory; s6: when the circuit board is installed in the equipment and runs again, the first MCU reads the corresponding relation between Uout and Ui, and when the value to be output on the electrode plate is Uout, the first MCU correspondingly outputs Ui. The invention is simple and quick.
Description
Technical Field
The invention relates to electrotherapy equipment, in particular to a method for guaranteeing output amplitude of electrode plates of electrotherapy equipment, and belongs to the technical field of electrotherapy equipment.
Background
The stimulating signals of the existing medium-frequency and low-frequency electric stimulation therapeutic apparatus are output through electrode plates, the electrode plates are connected to a circuit board of a host, signals sent by an MCU on the circuit board are transmitted to the electrode plates through a circuit to finish electric stimulation therapy, the MCU sends signals with different voltage amplitudes, and different stimulating intensities are obtained on the electrode plates. In the production and manufacture of the electro-stimulation therapeutic apparatus, as different component values are caused by differences of materials and processes in the manufacturing process of electronic components forming a circuit on a circuit board, when various components are used for building the circuit, different positive and negative deviations can cause various different deviations of overall performance parameters of the circuit board, different deviation values generated by different batches of electronic components can also cause different differences of performance parameters of the circuit board, and the differences can cause inconsistent output of electrode plate ends of different circuit boards under the condition that MCU (micro controller Unit) on the circuit board outputs signals of the same size, so that in order to ensure the consistency of the output, the circuit board needs to be subjected to amplitude calibration adjustment when the equipment leaves a factory so as to ensure that the output amplitude is inconsistent when the equipment leaves a factory, and the amplitude is finishedAnd after calibration, the gear is linearly stepped according to the output gear number. The current common guarantee method of the circuit board is as mentioned in the background technology of chinese patent application No. 2020228736623 (a calibration and adjustment circuit and electrotherapy device) and adopts a method of manually adjusting an adjustable potentiometer, in actual adjustment, the lower limit of the output amplitude is 0, so only the upper limit is required to be adjusted, and the manual adjustment steps are generally: the method comprises the steps of firstly setting up a power supply and use environment for a circuit board to be tested, secondly connecting the circuit board to be tested with a 500 ohm fixed load and connecting an oscilloscope or amplitude checking equipment, thirdly starting electric stimulation, adjusting the electric stimulation intensity of an MCU on the circuit board to the highest amplitude, fourthly checking the amplitude at the moment, calculating the difference between the amplitude and a target value, fifth manually adjusting an adjustable potentiometer on the circuit board to adjust the voltage step by step in the opposite direction, and sixth checking the amplitude again, returning to the fifth step until the amplitude reaches the expected value if the amplitude is not satisfied. The adjustment process is time consuming and laborious, requiring visual confirmation each time, affecting output consistency. In order to overcome the above-mentioned drawbacks, the applicant disclosed in chinese patent application No. 2020228736623 a calibration and adjustment circuit and an electrotherapy device, which can implement automatic calibration of a circuit board, and the calibration method is essentially the same as that of manually adjusting an adjustable potentiometer, but the analog potentiometer is replaced by a digital potentiometer, but the method needs to make a larger change to a hardware circuit. Moreover, the current calibration and gear shifting have the following problems: the device cost of the digital potentiometer is higher than that of the analog potentiometer, the output of the device is calibrated by the adjustable potentiometer in the circuit board, and in the subsequent use, as the output of the digital potentiometer is influenced by the working voltage of the digital potentiometer, the amplitude and fluctuation of the working voltage of the digital potentiometer can influence the actual resistance and precision of the potentiometer, the inaccuracy of the amplitude output by the electrode plate end can be caused, if the output voltage of the electrode plate is lower, the treatment effect can be influenced, and if the amplitude of the output voltage exceeds the upper limit, the inaccuracy is not allowed; secondly, the output is to be graded after the calibration of the circuit board, and the current grading adopts linear grading, for example, if the output voltage of the MCU corresponding to the upper limit of the output amplitude is U T， If the output intensity is divided into 5 gears, the output voltage of each gear from small to large is 0.2U T 、0.4U T 、0.6U T 、0.8U T 、U T， However, in reality, the output voltage of the MCU is not strictly linear with the stimulating voltage of the electrode pad after passing through the circuit, so that the step is only an approximate processing mode, and the actual voltage except the highest step is only near the selected gear and is not an accurate value during the electrical stimulation treatment.
Disclosure of Invention
The invention aims to overcome the problems in the output of the electrode slice of the current electrotherapy equipment and provides a method for guaranteeing the output amplitude of the electrode slice of the electrotherapy equipment.
In order to achieve the purpose of the invention, the following technical scheme is adopted: the electrode plate is connected to an output port of a circuit board, the circuit board is provided with a power interface, the circuit board is provided with a first MCU for sending out waveform signals, the circuit board is provided with a memory, and the first MCU is provided with a first communication port and is calibrated by adopting the following method:
the method comprises the steps that S1, a power interface of a circuit board to be calibrated is connected with a power supply, an electrode plate is connected with a load resistor RL with 500 ohms, the circuit board is connected with a feedback module, a second MCU is arranged in the feedback module, a display is connected to the second MCU, the output of the feedback circuit is connected to the second MCU, the feedback circuit comprises a sampling resistor RFB connected in series with the load resistor RL, one end of the resistor Rin is connected between the load resistor RL and the sampling resistor RFB, the other end of the resistor Rin is connected with a 3 pin of an amplifier U1A, a 2 pin of the amplifier U1A is connected with a 1 pin through a resistor Rf1, the 2 pin of the amplifier is grounded after passing through a resistor Rf2, the 1 pin of the amplifier is output to the second MCU after passing through a resistor Rout, and a first communication port on the circuit board is connected with a second communication port on the second MCU;
s2: the circuit board is connected with a power supply and establishes communication with the feedback module;
s3: setting an output voltage value Uout of the electrode sheet on the display; uout is greater than zero and less than or equal to Uh, and Uh is the amplitude of equipment output;
s4: the first MCU outputs a signal Ui, and the feedback circuit acquires a voltage value Uouti on the electrode plate and transmits the voltage value Uouti to the second MCU; the second MCU adjusts the output Ui of the first MCU in a forward direction or a reverse direction according to the difference value between Uouti and Uout;
s5: when the feedback modules uouti=uout are equal in the step S4, the voltage value Ui of the output signal of the first MCU corresponding to Uout is stored in the memory;
s6: when the circuit board is installed in the equipment and runs again, the first MCU reads the corresponding relation between Uout and Ui, and when the value to be output on the electrode plate is Uout, the first MCU correspondingly outputs Ui.
Further; the above-mentioned uout=uh, and the steps S3 to S5 are executed once, and when the electrotherapy device works, uout is the maximum intensity of the electrical stimulation output of the first MCU.
Further; the Uout is a plurality of values greater than zero and less than or equal to Uh, the existing steps S3 to S5 are executed for a plurality of times, the corresponding Uout and Ui are stored in a memory each time, and when the electrotherapy device works, the corresponding electrical stimulation intensity from the lower part to the higher part of each Uout is from the lower part to the higher part of each Uout.
Further; calibration is carried out on unable adjustment base, has three contact on unable adjustment base, and the power of circuit board is awaited measuring is connected to first contact of group, and first MCU, second MCU communication are connected to the contact of second group, and the third contact is connected load resistance and the output with the electrode slice, and the corresponding position of circuit board that awaits measuring also processes the metal contact that has the flying space, and when circuit board that awaits measuring was put unable adjustment base, both metal contacts closely link to each other.
Further; the first MCU sends out a low-frequency or medium-frequency output signal.
The invention has the positive and beneficial technical effects that: the invention avoids the trouble of manually adjusting the potentiometer to calibrate, and has simple and quick calibration process; secondly, the method not only can ensure the amplitude, but also can ensure the gear value of each electric stimulation intensity; thirdly, by adopting the method, the adjustable potentiometer can be not used on the circuit board, so that the related problems caused by the drift of the adjustable potentiometer in the subsequent use process are avoided, and the stability of the equipment in the subsequent use process is ensured.
Drawings
Fig. 1 is a connection block diagram port employing the present method.
Fig. 2 is a circuit schematic of the feedback module.
Fig. 3 is a schematic diagram of a circuit board tested on a stationary base.
OUTA, OUTB are electrode pad outlets on the circuit board, 1 in fig. 3 the stationary base, 2 is the equipment frame.
Detailed Description
Examples of embodiments of the present invention are provided for more fully explaining the practice of the present invention, and are merely illustrative of the present invention and do not limit the scope of the present invention.
The method is used for output calibration of medium-frequency and low-frequency electric stimulation equipment. The MCU on the circuit board of the existing electrotherapy device is provided with a communication port (communication serial port). The memory used in the method can be a memory integrated in the first MCU or a memory outside the first MCU.
When the method is adopted for calibration, the fixed base tool shown in fig. 3 is adopted, three groups of contacts are arranged on the fixed base 1, the first group of contacts are connected with a power supply structure of a circuit board to be tested, the second group of contacts are connected with a first MCU and a second MCU for communication, the third contact is used for connecting a load resistor with the output of an electrode plate, corresponding metal contacts are also processed at corresponding positions of the circuit board to be tested, and when the circuit board to be tested is placed on the fixed base for compression, the two metal contacts are tightly connected.
The electrode plate is connected to output ports OUTA and OUTB of a circuit board, the circuit board is provided with a power interface, the circuit board is provided with a first MCU for sending out waveform signals, the circuit board is provided with a memory, and the first MCU is provided with a first communication port and is calibrated by adopting the following method:
the circuit board to be calibrated is connected with a power supply through a power interface, the output of the electrode plate is connected with a load resistor RL with the amplitude of 500 ohms, the circuit board is connected with a feedback module, a second MCU is arranged in the feedback module, a display is connected to the second MCU, the output of the feedback circuit is connected to the second MCU, the feedback circuit comprises a sampling resistor RFB connected in series with the load resistor RL, one end of the resistor Rin is connected between the load resistor RL and the sampling resistor RFB, the other end of the resistor Rin is connected with a 3 pin of an amplifier U1A, a 2 pin of the amplifier U1A is connected with a 1 pin through a resistor Rf1, the 2 pin of the amplifier is grounded after passing through a resistor Rf2, the 1 pin of the amplifier is output to the second MCU after passing through a resistor Rout, and a first communication port on the circuit board is connected with a second communication port on the second MCU;
s2: the circuit board is connected with a power supply and establishes communication with the feedback module;
s3: setting an output voltage value Uout of the electrode sheet on the display; uout is greater than zero and less than or equal to Uh, and Uh is the amplitude of equipment output;
s4: the first MCU outputs a signal Ui, and the feedback circuit acquires a voltage value Uouti on the electrode plate and transmits the voltage value Uouti to the second MCU; the second MCU adjusts the output Ui of the first MCU in a forward direction or a reverse direction according to the difference value between Uouti and Uout;
s5: when the feedback modules uouti=uout are equal in the step S4, the voltage value Ui of the output signal of the first MCU corresponding to Uout is stored in the memory;
s6: when the circuit board is installed in the equipment and runs again, the first MCU reads the corresponding relation between Uout and Ui, and when the value to be output on the electrode plate is Uout, the first MCU correspondingly outputs Ui.
After the execution of step S5 is completed, a further optimized scheme is provided, in which, when the circuit errors and tolerances are equal, uouti=uout, the voltage value Ui of the output signal of the first MCU corresponding to Uout is saved in the memory, and the Ui may not be the minimum value at this time, and the same output amplitude may be obtained even if the Ui is further reduced, and then the Ui is reduced by 1-5% to obtain U （i+1） The method comprises the steps of carrying out a first treatment on the surface of the Whether Uout changes or not is checked, if not, the U is obtained by continuously reducing 1-5 percent （i+2） Whether Uout changes or not is checked, if not, the U is obtained by continuously reducing 1-5% （i+3） The method comprises the steps of carrying out a first treatment on the surface of the And so on until the Uout is reduced, the corresponding U is （i+n） In U form （i+n-1） The corresponding voltage value is updated as a new Ui instead of the Ui saved in the memory in step S5.
The feedback circuit in the present application may employ the following options: U1A: LM 358; rl=500Ω, rfb=1Ω; rin=10kΩ; rout=2kΩ; rf1=9kΩ; rf2 = 1kΩ; the first MCU and the second MCU can be selected from GD32F103vct6
First embodiment: calibration of amplitude:
the amplitude is the maximum allowable output upper limit of the electrode plate, and the stimulus intensity during the electric stimulus treatment must be less than or equal to the amplitude.
The method comprises the steps that firstly, an electric stimulation output amplitude Uh and tolerance are set on a display, and a second MCU obtains the data;
the second step is to put the circuit board to be tested on the base and compress the circuit board to be tested, the circuit board to be tested and the feedback module complete connection communication,
starting calibration, the first MCU outputs u i When the current is modulated and amplified and then is output to a load, the current generates an electric signal v through a sampling resistor RFB i Electric signal gamma i Through the amplifier U1A, the signal is converted into the working range input by the ADC module. The second MCU in the feedback module judges the difference with the target value by acquiring the Uouti value of the signal, when the Uouti is smaller than the Uh, the next Ui output by the first MCU is increased, when the Uouti is smaller than the Uh, the next Ui output by the first MCU is reduced until Uouti=Uh, the value of the Uouti is stored in a memory and is used as the amplitude of the first MCU output of the electrotherapy equipment, after the amplitude of the first MCU output is obtained, the stimulation intensity can be graded averagely according to a traditional method, and particularly if N gears exist, the output of the first MCU of each gear sequentially increases Uouti/N. When the device is used, the first MCU reads the Uout and N values in the memory and can output the stimulation intensity which does not exceed the standard according to the gear. Further optimized in this step, when uouti=uh is equal, the voltage value Ui of the output signal of the first MCU corresponding to Uout is saved in the memory, because the Ui may not be the minimum value at this time, and the same output amplitude Uh may also be obtained when the Ui is further reduced, and then the Ui is reduced by 1-5% to obtain U （i+1） The method comprises the steps of carrying out a first treatment on the surface of the Whether Uout changes or not is checked, if not, the U is obtained by continuously reducing 1-5 percent （i+2） Whether Uh changes or not is checked, if not, the U is obtained by continuously reducing 1-5 percent （i+3） The method comprises the steps of carrying out a first treatment on the surface of the And so on to obtain U corresponding to the time when Uh is reduced （i+n） In U form （i+n-1） The corresponding voltage value replaces the Ui stored in the memory, and the new Ui corresponding to the output amplitude of the device is updated.
Second embodiment: calibration of the intensity of each stimulation gear:
the calibration process of each gear is the same as the calibration process of the amplitude, but only the electric stimulation output amplitude Uh on the display is changed to the corresponding gear value in the first step, and the calibration process is the same. When calibrating, each gear can be calibrated in sequence from low gear to high gear, one gear can be selected at will for calibration, and the amplitude is the highest gear.
Having described embodiments of the present invention in detail, it will be apparent to those skilled in the art that various changes and modifications can be made therein without departing from the scope and spirit of the invention as defined in the appended claims, and any simple, equivalent changes and modifications to the above examples are intended to be within the scope of the present invention and the invention is not limited to the embodiments as set forth in the specification.
Claims (4)
1. The method for calibrating the output amplitude of the electrode plate of the electrotherapy equipment is characterized in that the electrode plate is connected to an output port of a circuit board, the circuit board is provided with a power interface, the circuit board is provided with a first MCU for sending out waveform signals, the circuit board is provided with a memory, and the first MCU is provided with a first communication port, and the method is characterized in that the method is adopted for calibrating:
the method comprises the steps that S1, a power interface of a circuit board to be calibrated is connected with a power supply, an electrode plate is connected with a load resistor RL with 500 ohms, the circuit board is connected with a feedback module, a second MCU is arranged in the feedback module, a display is connected to the second MCU, a feedback circuit is further arranged in the feedback module, the output of the feedback circuit is connected to the second MCU, the feedback circuit comprises a sampling resistor RFB connected in series with the load resistor RL, one end of the resistor Rin is connected between the load resistor RL and the sampling resistor RFB, the other end of the resistor Rin is connected with a 3 pin of an amplifier U1A, a 2 pin of the amplifier U1A is connected with the 1 pin through a resistor Rf1, the 2 pin of the amplifier is grounded after passing through a resistor Rf2, the 1 pin of the amplifier is output to the second MCU after passing through a resistor Rout, and a first communication port on the circuit board is connected with a second communication port on the second MCU;
s2: the circuit board is connected with a power supply and establishes communication with the feedback module;
s3: setting an output voltage value Uout of the electrode sheet on the display; uout is greater than zero and less than or equal to Uh, and Uh is the amplitude of equipment output;
s4: the first MCU outputs a signal Ui, and the feedback circuit acquires a voltage value Uouti on the electrode plate and transmits the voltage value Uouti to the second MCU; the second MCU positively or reversely adjusts the output Ui of the first MCU according to the difference value between Uouti and Uout so that the Uouti approaches the Uout;
s5: when the feedback modules uouti=uout are equal in the step S4, the voltage value Ui of the output signal of the first MCU corresponding to Uout is stored in the memory;
s6: when the circuit board is arranged in the equipment and runs again, the first MCU reads the corresponding relation between Uout and Ui, and when the value to be output on the electrode sheet is Uout, the first MCU correspondingly outputs Ui;
calibration is carried out on unable adjustment base, has three contact on the unable adjustment base, and first group contact is connected the power of the circuit board of waiting to calibrate, and first MCU, second MCU communication are connected to the contact of second group, and the third contact is connected the load resistance with the output of electrode slice, and the circuit board of waiting to calibrate corresponds the position and also has processed corresponding metal contact, and when unable adjustment base was put to the circuit board of waiting to calibrate, both metal contacts closely link to each other.
2. The method for calibrating the output amplitude of an electrode plate of an electrotherapy device according to claim 1, wherein: the above-mentioned uout=uh, and the steps S3 to S5 are executed once, and when the electrotherapy device works, uout is the maximum intensity of the electrical stimulation output of the first MCU.
3. The method for calibrating the output amplitude of an electrode plate of an electrotherapy device according to claim 1, wherein: the Uout is a plurality of values greater than zero and less than or equal to Uh, the existing steps S3 to S5 are executed for a plurality of times, the corresponding Uout and Ui are stored in a memory each time, and when the electrotherapy device works, the corresponding electrical stimulation intensity from the lower part to the higher part of each Uout is from the lower part to the higher part of each Uout.
4. The method for calibrating the output amplitude of an electrode plate of an electrotherapy device according to claim 1, wherein: the first MCU sends out a low-frequency or medium-frequency output signal.
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| CN202310216311.0A CN116466213B (en) | 2023-03-08 | 2023-03-08 | Method for guaranteeing output amplitude of electrode plate of electrotherapy equipment |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2000009801A (en) * | 1998-06-19 | 2000-01-14 | Advantest Corp | Method for calibrating tdr timing of ic test apparatus |
| CN106618485A (en) * | 2015-11-04 | 2017-05-10 | 三星电子株式会社 | Signal processing apparatus and method |
| CN111366861A (en) * | 2018-12-07 | 2020-07-03 | 通用汽车环球科技运作有限责任公司 | Estimating battery state using electrode transient model |
| CN113341254A (en) * | 2021-06-08 | 2021-09-03 | 中国科学院空天信息创新研究院 | Aircraft static electricity detection device and method |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US8134369B2 (en) * | 2009-04-28 | 2012-03-13 | Kjt Enterprises, Inc. | Method of testing electric field recording of a marine electromagnetic sensor cable |
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Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2000009801A (en) * | 1998-06-19 | 2000-01-14 | Advantest Corp | Method for calibrating tdr timing of ic test apparatus |
| CN106618485A (en) * | 2015-11-04 | 2017-05-10 | 三星电子株式会社 | Signal processing apparatus and method |
| CN111366861A (en) * | 2018-12-07 | 2020-07-03 | 通用汽车环球科技运作有限责任公司 | Estimating battery state using electrode transient model |
| CN113341254A (en) * | 2021-06-08 | 2021-09-03 | 中国科学院空天信息创新研究院 | Aircraft static electricity detection device and method |
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