Acquisition control circuit

Abstract

The utility model provides an acquisition control circuit, which is used for a bioelectricity detection device and comprises an acquisition sub-circuit and a main control chip, the acquisition sub-circuit comprises a bias signal interface unit, at least one bio-electricity signal interface unit, an HDMI MINI switching unit and a bio-electricity acquisition chip; one end of the HDMI MINI switching unit is connected with a bioelectricity channel, and the other end of the HDMI MINI switching unit is connected with the bias signal interface unit and one end of each bioelectricity signal interface unit; the other end of the bias signal interface unit is respectively connected with a bias voltage output pin and a signal input channel of the bioelectricity acquisition chip; the other end of each bioelectricity signal interface unit is connected with a signal input channel of the bioelectricity acquisition chip; and the bioelectricity acquisition chip is in communication connection with the main control chip. The anti-interference performance and the signal acquisition precision of the system can be effectively improved, and the requirement of multi-channel real-time data transmission is met.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of medical electronic equipment, in particular to a collection control circuit. BACKGROUND

[0002] With the rapid development of bioelectric signal detection technology, the collection and analysis of bioelectric signals such as electroencephalogram (EEG), electromyogram (EMG) and electrocardiogram (ECG) are more and more widely used in the fields of medical diagnosis, rehabilitation training, brain-computer interface, etc. Bioelectric signals have the characteristics of weak amplitude, much noise interference and complex dynamic change, and how to efficiently and accurately collect these signals and perform reliable transmission and processing is one of the focuses of current technical research.

[0003] The existing bioelectric signal collection system usually includes electrodes, front-end signal processing circuit and main control processing unit. Among them, the main function of the collection part is to obtain weak bioelectric signals from the living body, and to amplify, filter and analog-to-digital convert (ADC) the signals through the front-end circuit, so as to provide high-quality signal input for subsequent data processing. However, in the process of signal input from the electrode to the main control chip in the prior art, there is a lack of systematic front-end processing and optimal design, which limits the performance of the signal in the filtering, current limiting and analog-to-digital conversion links. Low data transmission efficiency: in the existing collection system, the digital signal after analog-to-digital conversion is usually transmitted to the main control unit through a low-speed interface, which cannot meet the real-time demand of multi-channel high-precision sampling. CONTENT OF THE UTILITY MODEL

[0004] Therefore, the purpose of the present application is to provide a collection control circuit which can effectively improve the anti-interference performance and signal collection accuracy of the system and meet the demand of multi-channel real-time data transmission.

[0005] In a first aspect, the embodiments of the present application provide a collection control circuit for a bioelectric detection device, comprising: a collection sub-circuit and a main control chip;

[0006] The collection sub-circuit comprises a bias signal interface unit, at least one bioelectric signal interface unit, an HDMI MINI adapter unit and a bioelectric collection chip;

[0007] One end of the HDMI MINI adapter unit is connected to a bioelectric channel, and the other end is respectively connected to one end of the bias signal interface unit and each bioelectric signal interface unit;

[0008] The other end of the bias signal interface unit is respectively connected to a bias voltage output pin and a signal input channel of the bioelectric collection chip; and the other end of each bioelectric signal interface unit is connected to a signal input channel of the bioelectric collection chip;

[0009] The bioelectricity collection chip is in communication connection with the master control chip.

[0010] With reference to the first aspect, in a first possible implementation manner of the first aspect, the bias signal interface unit comprises a first connector, a second connector and a first filter circuit;

[0011] One end of the first connector is connected to the HDMI MINI adapter unit, and the other end is connected to the signal input channel of the bioelectricity collection chip through the first filter circuit.

[0012] One end of the second connector is connected to the HDMI MINI adapter unit, and the other end is connected to the signal input channel of the bioelectricity collection chip through the first filter circuit.

[0013] With reference to the first aspect, in a second possible implementation manner of the first aspect, the bioelectricity signal interface unit comprises a third connector and a second filter circuit;

[0014] One end of the third connector is connected to the HDMI MINI adapter unit.

[0015] The other end of the third connector is connected to the signal input channel of the bioelectricity collection chip through the second filter circuit.

[0016] With reference to the first aspect, in a third possible implementation manner of the first aspect, the collection sub-circuit further comprises a reference signal interface unit;

[0017] One end of the reference signal interface unit is connected to the HDMI MINI adapter unit.

[0018] The other end of the reference signal interface unit is connected to a reference signal pin of the bioelectricity collection chip.

[0019] With reference to the first aspect, in a fourth possible implementation manner of the first aspect, the reference signal interface unit comprises a fourth connector and a third filter circuit;

[0020] One end of the fourth connector is connected to the HDMI MINI adapter unit.

[0021] The other end of the fourth connector is connected to the reference signal pin of the bioelectricity collection chip through the third filter circuit.

[0022] With reference to the first aspect, in a fifth possible implementation manner of the first aspect, the bioelectricity collection chip adopts an ADS1299 chip.

[0023] With reference to the first aspect, the second possible implementation of the first aspect is provided in embodiments of the present application. The data receiving end of the transparent chip is connected with the data sending end of the master chip to receive the bioelectric information sent by the master chip.

[0024] With reference to the first aspect, the seventh possible implementation of the first aspect is provided in embodiments of the present application. The SPI communication port of the master chip comprises an SPI clock line, a host data transceiving line and a chip selection signal line.

[0025] The SPI clock line, the host data transceiving line and the chip selection signal line are respectively connected to the corresponding pins of the master chip.

[0026] With reference to the first aspect, the eighth possible implementation of the first aspect is provided in embodiments of the present application. The acquisition control circuit further comprises a gyroscope sub-circuit.

[0027] The gyroscope sub-circuit comprises a gyroscope control chip, a transceiver chip and a gyroscope communication port.

[0028] The gyroscope control chip is connected with the gyroscope communication port.

[0029] The transceiver chip is connected with the gyroscope communication port.

[0030] With reference to the first aspect, the ninth possible implementation of the first aspect is provided in embodiments of the present application. The gyroscope control chip is an LIS3DHTR chip.

[0031] The transceiver chip is an SN74LVC chip.

[0032] The acquisition control circuit provided in embodiments of the present application is used in a bioelectric detection device, comprising an acquisition sub-circuit and a master chip. The acquisition sub-circuit comprises a bias signal interface unit, at least one bioelectric signal interface unit, an HDMIMINI switching unit and a bioelectric acquisition chip. One end of the HDMIMINI switching unit is connected with a bioelectric channel, and the other end of the HDMIMINI switching unit is respectively connected with one end of the bias signal interface unit and one end of each bioelectric signal interface unit. The other end of the bias signal interface unit is respectively connected with a bias voltage output pin and a signal input channel of the bioelectric acquisition chip. The other end of each bioelectric signal interface unit is connected with a signal input channel of the bioelectric acquisition chip. The bioelectric acquisition chip is in communication connection with the master chip. The system can effectively improve the anti-interference performance and signal acquisition accuracy, and meet the demand of multi-channel real-time data transmission. BRIEF DESCRIPTION OF DRAWINGS

[0033] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings needed to be used in the embodiment description will be briefly introduced as follows. Obviously, the drawings in the following description only represent some embodiments of the present application, and all other drawings obtained by those skilled in the art without creative efforts based on the embodiments of the present application also belong to the scope of protection of the present application.

[0034] Figure 1 A structure diagram of a collection control circuit of a bioelectricity detection device provided by the embodiment of the present application is shown in the figure.

[0035] Figure 2 A structure diagram of a collection control circuit of another bioelectricity detection device provided by the embodiment of the present application is shown in the figure.

[0036] Figure 3 A structure diagram of a main control sub-circuit of a collection control circuit of a bioelectricity detection device provided by the embodiment of the present application is shown in the figure.

[0037] Figure 4 A structure diagram of a main control sub-circuit of a collection control circuit of another bioelectricity detection device provided by the embodiment of the present application is shown in the figure.

[0038] Figure 5 A structure diagram of a gyroscope sub-circuit of a collection control circuit of a bioelectricity detection device provided by the embodiment of the present application is shown in the figure. DETAILED DESCRIPTION

[0039] In order to make the purpose, technical solutions and advantages of the embodiments of the present application more clear, the technical solutions in the embodiments of the present application will be described clearly and completely in combination with the drawings in the embodiments of the present application. Obviously, the described embodiments are only some embodiments of the present application, but not all the embodiments of the present application. The components of the embodiments of the present application described and shown in the drawings can be arranged and designed in various different configurations.

[0040] Therefore, the detailed description of the embodiments of the present application provided in the drawings below is not intended to limit the scope of the claimed present application, but only represents selected embodiments of the present application. All other embodiments obtained by those skilled in the art without creative efforts based on the embodiments in the present application also belong to the scope of protection of the present application.

[0041] It should be noted that: similar reference numerals and letters represent similar items in the following drawings, therefore, once an item is defined in one drawing, it does not need to be further defined and explained in the subsequent drawings.

[0042] In the description of the utility model, it is understood that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, or the orientation or positional relationship commonly used when the utility model product is used, or the orientation or positional relationship commonly understood by those skilled in the art, which is only for the convenience of describing the utility model and simplifying the description, and is not intended to indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the utility model.

[0043] In addition, the terms "first", "second", "third" and the like are only used for differentiation and description, and cannot be understood as indicating or implying relative importance.

[0044] In the description of the utility model, it is also necessary to point out that, unless otherwise explicitly specified and limited, the terms "set", "install", "connect", "connect" should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium, or it can be the communication between two elements. For those skilled in the art, the specific meaning of the above terms in the utility model can be understood according to the specific circumstances.

[0045] Considering that in the prior art, the bioelectric signal acquisition system usually includes electrodes, front-end signal processing circuit and main control processing unit. Among them, the main function of the acquisition part is to obtain weak bioelectric signals from the living body, and to amplify, filter and analog-to-digital convert (ADC) the signals through the preamplifier circuit, so as to provide high-quality signal input for subsequent data processing. However, in the prior art, the process of signal from electrode to main control chip lacks systematic front-end processing and optimization design, resulting in limited performance of signal in filtering, current limiting and analog-to-digital conversion links. Low data transmission efficiency: in the existing acquisition system, the digital signal after analog-to-digital conversion is usually transmitted to the main control unit through a low-speed interface, which cannot meet the real-time requirement of multi-channel high-precision sampling.

[0046] The embodiment of the present application provides a kind of acquisition control circuit, for biological electricity detection device, including: acquisition subcircuit and master control chip;The acquisition subcircuit includes bias signal interface unit, at least one biological electricity signal interface unit, HDMI MINI adapter unit and biological electricity acquisition chip;The one end of the HDMI MINI adapter unit is connected with biological electricity channel, and the other end is respectively connected with the one end of the bias signal interface unit and each biological electricity signal interface unit;The other end of the bias signal interface unit is respectively connected with the bias voltage output pin and signal input channel of the biological electricity acquisition chip;The other end of each biological electricity signal interface unit is connected with the signal input channel of the biological electricity acquisition chip;The biological electricity acquisition chip is connected with the master control chip in communication.It can effectively improve the anti-interference performance and signal acquisition precision of system, and meet the demand of multi-channel real-time data transmission.

[0047] Please refer to Figure 1 , Figure 1 The structure schematic diagram of the acquisition control circuit 100 provided by the embodiment.

[0048] As Figure 1 indicated, the acquisition control circuit 100 provided by the embodiment, for biological electricity detection device, includes: acquisition subcircuit 110 and master control chip 121.

[0049] Specifically, acquisition subcircuit 110 includes bias signal interface unit 111, at least one biological electricity signal interface unit 112, HDMI MINI adapter unit 113 and biological electricity acquisition chip 114;The one end of the HDMI MINI adapter unit 113 is connected with biological electricity channel, and the other end is respectively connected with the one end of the bias signal interface unit 111 and each biological electricity signal interface unit 112;The other end of the bias signal interface unit 111 is respectively connected with the bias voltage output pin and signal input channel of the biological electricity acquisition chip 114;The other end of each biological electricity signal interface unit 112 is connected with the signal input channel of the biological electricity acquisition chip;Biological electricity acquisition chip 114 is connected with master control chip 121 in communication.

[0050] Preferably, the bioelectricity collection chip 114 adopts ADS1299 chip, which is a high-performance, multi-channel, low-power analog-to-digital converter gate designed for bioelectricity signal collection applications, especially suitable for the measurement of biomedical signals such as electroencephalogram (EEG) and electromyogram (EMG). It provides 8 synchronous sampling channels, each of which can be independently configured with gain and input mode. It supports 24-bit resolution, can capture weak bioelectricity signals, supports multiple gain settings (such as x1, x2, x4, x6, etc.), is convenient for adapting to different signal strengths, and has built-in bias generation, respiration detection, electrode contact detection, etc. to reduce the complexity of peripheral circuits. It supports SPI interface for communication with the host IC, which is convenient for embedded system integration.

[0051] Here, in the bioelectricity collection chip 114, AVDD and AVSS provide analog power supply for driving the analog signal processing part, AGND is the analog ground, which is connected to the common reference point of all analog signals to avoid interference from power supply noise. BIAS_DRY is a bias output signal used to generate a common-mode reference voltage for the human body. The bias output is connected to the human body through an operational amplifier, which improves the common-mode noise rejection capability. The bias voltage output pin (BIASOUT) outputs a stable bias voltage, and the signal is stabilized through peripheral resistance and capacitance.

[0052] Among them, for the signal input channel (INxP and INxN) of the bioelectricity collection chip 114, each channel has two input terminals, which are positive (INxP) and negative (INxN) respectively. The signal is connected to the input pin through the electrode, and there is a matching resistance and a filter capacitor between the electrodes. It is used to collect weak bioelectricity signals, and at the same time configure a filter circuit to suppress high-frequency noise and interference signals.

[0053] Further, the bias signal interface unit 111 includes a first connector 10, a second connector 11, and a first filter circuit 12; the bioelectricity signal interface unit 112 includes a third connector 20 and a second filter circuit 21.

[0054] Here, one end of the first connector 10 is connected to the HDMI MINI adapter unit 113, and the other end is connected to the signal input channel (INxP and INxN) of the bioelectricity collection chip 114 through the first filter circuit 12; one end of the second connector 11 is connected to the HDMI MINI adapter unit 113, and the other end is connected to the signal input channel (INxP and INxN) of the bioelectricity collection chip 113 through the first filter circuit 12. One end of the third connector 20 is connected to the HDMI MINI adapter unit 113; the other end of the third connector 20 is connected to the signal input channel (INxP and INxN) of the bioelectricity collection chip 114 through the second filter circuit 21.

[0055] In a specific implementation, the bioelectric signal is input through electrodes connected to the living body, transmitted to the bias signal interface unit 111 and the at least one bioelectric signal interface unit 112 through the HDMI MINI adapter unit 113, and the electrode access signal is usually a weak analog electrical signal, which has a low amplitude and a low frequency and is easily disturbed. Therefore, it is necessary to set a surge protection IC on the channel through which the bioelectric signal is input from the HDMI interface to limit the sudden high voltage in the signal path and protect the safety of the subsequent circuit.

[0056] Preferably, after surge protection, the signal passes through a set of filter capacitors to remove high-frequency noise. The filter capacitors are connected in a bypass design (grounded) to reduce the strength of the interference signal, and a current-limiting resistor is used to limit the current to prevent damage to the subsequent circuit caused by excessive current, while avoiding further high-frequency noise entering the signal processing path.

[0057] Here, the analog signal processed by the surge protection, filter capacitors and current-limiting resistor enters the signal input channel (INxP and INxN) of the ADS1299 chip, and the BIASOUT pin of the ADS1299 chip generates a stable bias signal for driving the bias circuit of the human body. This signal acts on the electrode through a feedback path to balance the potential of the human body and reduce noise interference.

[0058] As a possible implementation, please refer to Figure 2 , Figure 2 Another structure diagram of the acquisition control circuit 100 of the bioelectric detection device provided in the embodiment is shown in the figure. Figure 1 On the basis of the structure shown in the figure, the acquisition sub-circuit 110 further includes a reference signal interface unit 115; the reference signal interface unit 115 includes a fourth connector 30 and a third filter circuit 31.

[0059] As shown in the figure, Figure 2 One end of the reference signal interface unit 115 is connected to the HDMI MINI adapter unit 113; the other end of the reference signal interface unit 115 is connected to the reference signal pins (SRB1, SRB2) of the bioelectric acquisition chip 114.

[0060] Specifically, one end of the fourth connector 30 is connected to the HDMI MINI adapter unit 113; the other end of the fourth connector 30 is connected to the reference signal pins (SRB1, SRB2) of the bioelectric acquisition chip 114 through the third filter circuit 31.

[0061] Here, in the ADS1299 chip, the reference signal pins (SRB1, SRB2) provide a common reference signal for multiple channels. Improve the consistency of signals between multiple channels and reduce the deviation between channels. The reference signal pin SRB1 provides a shared reference signal for the negative poles (INxN) of multiple channels, and the reference signal pin SRB2 is used for a single channel as a reference signal configuration. The reference signal pin connects the signals of multiple channels through a common reference electrode, improving the consistency between channels.

[0062] Please refer to Figure 3 , Figure 3 The structure diagram of the main control sub-circuit 120 of the acquisition control circuit 100 of the biological electric detection device provided in the embodiment is shown.

[0063] As Figure 3 shown, the main control sub-circuit 120 of the acquisition control circuit 100 of the biological electric detection device provided in the embodiment includes: a main control chip 121, a transparent transmission chip 122, and a main control chip SPI communication port 123.

[0064] Here, the data receiving end of the transparent transmission chip 122 is connected with the data sending end of the main control chip 121 to receive the biological electric information sent by the main control chip 121. The main control chip SPI communication port 123 includes an SPI clock line, a host data transceiver line, and a chip selection signal line; the SPI clock line (SCLK), the host data transceiver line (MOSI / MISO), and the chip selection signal line (CS) are respectively connected to the corresponding pins of the main control chip 121.

[0065] Preferably, the main control chip 121 is an STM32 chip.

[0066] In specific implementation, after the ADS1299 chip completes analog-to-digital conversion, the generated digital signal is transmitted to the main control chip 121 through the main control chip SPI communication port 123. SPI communication has the characteristics of high efficiency and low delay, and can meet the real-time transmission requirements of multi-channel biological electric signals. The main control chip 121 receives the digitized biological electric signals transmitted from the ADS1299 chip and sends them to the transparent transmission chip 122.

[0067] As a possible implementation, please refer to Figure 4 , Figure 4 The structure diagram of the main control sub-circuit 120 of the acquisition control circuit 100 of another biological electric detection device provided in the embodiment is shown.

[0068] On the basis of Figure 3 , as Figure 4As shown in the figure, the acquisition control circuit 100 of the bioelectricity detection device is modified for the device connection mode of the transceiving chip 122, the LED lamp connected with the transceiving chip 122 is removed, and the key debouncing sub-circuit 123 is added.

[0069] Specifically, the key debouncing sub-circuit 123 includes a switch, a capacitor is arranged in parallel with the switch, one end of the switch is grounded, and the other end is connected with the 3.3V voltage (DVDD) output by the power supply module of the bioelectricity detection device through a resistor.

[0070] Here, the connection node between the switch and the resistor is connected to the corresponding pin of the main control chip 121.

[0071] Please refer to Figure 5 , Figure 5 A structure diagram of the gyroscope sub-circuit 130 of the acquisition control circuit 100 of the bioelectricity detection device provided in the embodiment is shown in the figure.

[0072] As Figure 5 shown in the figure, the gyroscope sub-circuit 130 of the acquisition control circuit 100 of the bioelectricity detection device provided in the embodiment includes a gyroscope control chip 131, a transceiver chip 132, and a gyroscope communication port 133.

[0073] Specifically, the gyroscope control chip 131 is connected with the gyroscope communication port 133, and the transceiver chip 132 is connected with the gyroscope communication port 133.

[0074] Preferably, the gyroscope control chip 131 is an LIS3DHTR chip, and the transceiver chip 132 is an SN74LVC chip.

[0075] It should be noted that the gyroscope sub-circuit 130, the main control chip 121, and the bioelectricity acquisition chip 114 in the embodiment are powered by the 3.3V voltage (DVDD) output by the power supply module of the bioelectricity detection device, on the basis of which, the power supply module of the bioelectricity detection device outputs a 2.5V positive voltage (AVDD) to provide a positive reference voltage for the bioelectricity acquisition chip 114, and outputs a 2.5V negative voltage (AVSS) to provide a negative reference voltage for the bioelectricity acquisition chip 114, because the electric charge of the human body has positive charge and negative charge and an alternating current, so the reference voltage is needed for the detection function.

[0076] It should be noted that the resistance values and capacitance values of all resistors and capacitors mentioned in the embodiment can be set according to actual needs, which are not specifically limited here.

[0077] The embodiment of the application provides a collection control circuit for a bioelectricity detection device, comprising a collection sub-circuit and a master control chip; the collection sub-circuit comprises a bias signal interface unit, at least one bioelectricity signal interface unit, an HDMI MINI switching unit and a bioelectricity collection chip; one end of the HDMI MINI switching unit is connected with a bioelectricity channel, and the other end is connected with one end of the bias signal interface unit and each bioelectricity signal interface unit; the other end of the bias signal interface unit is connected with a bias voltage output pin and a signal input channel of the bioelectricity collection chip; the other end of each bioelectricity signal interface unit is connected with a signal input channel of the bioelectricity collection chip; and the bioelectricity collection chip is in communication connection with the master control chip. The anti-interference performance and signal collection precision of the system can be effectively improved, and the demand for multi-channel real-time data transmission can be met.

[0078] The above merely describes preferred embodiments of the present application and is not intended to limit the present application. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A data acquisition and control circuit, characterized in that, For use in bioelectric detection devices, including: acquisition sub-circuit and main control chip; The acquisition sub-circuit includes a bias signal interface unit, at least one bioelectric signal interface unit, an HDMI MINI adapter unit, and a bioelectric acquisition chip. One end of the HDMIMINI adapter unit is connected to the bioelectric channel, and the other end is connected to the bias signal interface unit and one end of each of the bioelectric signal interface units. The other end of each bias signal interface unit is connected to the bias voltage output pin and the signal input channel of the bioelectric acquisition chip, respectively; the other end of each bioelectric signal interface unit is connected to the signal input channel of the bioelectric acquisition chip. The bioelectricity acquisition chip is communicatively connected to the main control chip.

2. The acquisition and control circuit according to claim 1, characterized in that, The bias signal interface unit includes a first connector, a second connector, and a first filter circuit; One end of the first connector is connected to the HDMI MINI adapter unit, and the other end is connected to the signal input channel of the bioelectric acquisition chip via the first filter circuit; One end of the second connector is connected to the HDMI MINI adapter unit, and the other end is connected to the signal input channel of the bioelectric acquisition chip via the first filtering circuit.

3. The acquisition and control circuit according to claim 1, characterized in that, The bioelectric signal interface unit includes a third connector and a second filter circuit; One end of the third connector is connected to the HDMI MINI adapter unit; The other end of the third connector is connected to the signal input channel of the bioelectric acquisition chip via the second filter circuit.

4. The acquisition and control circuit according to claim 1, characterized in that, The acquisition sub-circuit also includes a reference signal interface unit; One end of the reference signal interface unit is connected to the HDMI MINI adapter unit; The other end of the reference signal interface unit is connected to the reference signal pin of the bioelectric acquisition chip.

5. The acquisition and control circuit according to claim 4, characterized in that, The reference signal interface unit includes a fourth connector and a third filter circuit; One end of the fourth connector is connected to the HDMI MINI adapter unit; The other end of the fourth connector is connected to the reference signal pin of the bioelectric acquisition chip via the third filter circuit.

6. The acquisition and control circuit according to claim 1, characterized in that: The bioelectric acquisition chip uses the ADS1299 chip.

7. The acquisition and control circuit according to claim 1, characterized in that, The acquisition and control circuit also includes a transparent transmission chip; The data receiving end of the transparent transmission chip is connected to the data sending end of the main control chip to receive bioelectrical information sent by the main control chip.

8. The acquisition and control circuit according to claim 1, characterized in that, The acquisition and control circuit also includes an SPI communication port for the main control chip; The main control chip's SPI communication port includes an SPI clock line, a host data transceiver line, and a chip select signal line. The SPI clock line, the host data transceiver line, and the chip select signal line are respectively connected to the corresponding pins of the main control chip.

9. The acquisition and control circuit according to claim 1, characterized in that, The acquisition and control circuit also includes a gyroscope sub-circuit; The gyroscope sub-circuit includes a gyroscope control chip, a transceiver chip, and a gyroscope communication port. The gyroscope control chip is connected to the gyroscope communication port; The transceiver chip is connected to the gyroscope communication port.

10. The acquisition and control circuit according to claim 9, characterized in that: The gyroscope control chip is a LIS3DHTR chip; The transceiver chip is an SN74LVC chip.

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