CN218332554U - Extensible possesses arbitrary ripples output function's electro photoluminescence ware - Google Patents

Abstract

The utility model discloses an extensible possesses arbitrary ripples output function's electric stimulator, include: the device comprises a storage module, a communication module, a main control module, a power supply module and a plurality of channel modules; wherein: the storage module is connected with the main control module through an I2C bus or an SPI interface or an FSMC interface; the main control module is connected with the communication module through a USART serial port or a SPI interface; the main control module is connected with the channel module through an IO line or a USART serial port or an SPI interface; the communication module is connected with the channel module through an SPI interface, a USART serial port or an I2C bus; the power supply module is respectively connected with the storage module, the communication module, the main control module and the channel module through power lines; when the hardware frame of the electric stimulator is used in cooperation with related software, the expansion function of the electric stimulator can be improved, and the electric stimulator can output various waveforms.

Description

Extensible possesses electric stimulator of arbitrary ripples output function

Technical Field

The utility model relates to an electro photoluminescence class medical equipment technical field, in particular to extensible possesses arbitrary ripples output function's electro stimulator.

Background

In order to restore the function of the human body or treat diseases, or to conduct relevant research, electrical stimulation is often used to directly apply current to a test body clinically or experimentally. Upon electrical stimulation, the electrons/currents flowing through the lead are converted into ionic currents flowing in the tissue, which can cause excitatory trans-membrane charge transport across the cell membrane of the tissue. The purpose of applying these stimulation currents is to depolarize the target nerve or muscle and reach a threshold voltage.

Because the structure of a human body or a laboratory body in a laboratory is complex, the effect under the electric stimulation of different frequencies, different amplitudes and different waveforms needs to be researched, and therefore, the electric stimulator with the flexible structure, which has any waveform output and can increase/decrease the stimulation channels according to the requirements, is needed to meet the requirements of clinic or experiment. The traditional electric stimulator product only has the functions of regulating pulse frequency, pulse amplitude and pulse duty ratio, and does not have the functions of editing and flexibly combining arbitrary waveforms and increasing/reducing stimulation channels, so that the traditional electric stimulator product cannot meet the requirements of clinical treatment, particularly scientific experimental research.

Therefore, how to construct a set of electrical stimulator hardware framework can improve the expansion function of the electrical stimulator when the electrical stimulator hardware framework is used in cooperation with related software, so that the electrical stimulator can help to output various waveforms, and becomes a key problem of current research.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide an extensible that solves above-mentioned technical problem at least part possesses arbitrary ripples output function's electro stimulator, can help improving the expansion function of electro stimulator when using this electro stimulator hardware frame cooperation relevant software, makes the electro stimulator can export multiple wave form.

The embodiment of the utility model provides an extensible possesses arbitrary ripples output function's electric stimulator, include: the system comprises a storage module (200), a communication module (300), a main control module (400), a power supply module (600) and a plurality of channel modules (700); wherein:

the storage module (200) is connected with the main control module (400) through an I2C bus or an SPI interface or an FSMC interface;

the main control module (400) is connected with the communication module (300) through a USART serial port or an SPI interface; the main control module (400) is connected with the channel module (700) through an IO line or a USART serial port or an SPI interface;

the communication module (300) is connected with the channel module (700) through an SPI interface, a USART serial port or an I2C bus;

the power supply module (600) is respectively connected with the storage module (200), the communication module (300), the main control module (400) and the channel module (700) through power lines.

Further, the system also comprises a man-machine interaction module (100);

the human-computer interaction module (100) is a liquid crystal screen of a DC80480M070 model;

the human-computer interaction module (100) is connected with the main control module (400) through an SPI interface or a USART serial port or an IO line;

the man-machine interaction module (100) is connected with the power supply module (600) through a power line.

Further, the storage module (200) is a FLASH chip or an EEPROM chip or a memory card.

Further, a trigger module (500) is also included;

the trigger module (500) adopts a PC817 photoelectric coupler to realize voltage isolation, and adopts a DQ trigger with a chip model number of SN74HC175D to realize capture of an external trigger signal;

the trigger module (500) is connected with the channel module (700) through an IO line;

the trigger module (500) is connected with the power supply module (600) through a power line.

Further, the channel module (700) comprises a sub communication module (702), a sub voltage reference module (703), a D/A output module (704), a sub control module (705), a sub storage module (706), a current pump module (707) and a current transformer module (709);

the sub-control module (705) is connected with the sub-communication module (702) through a USART serial port or an SPI interface; the sub-communication module (702) is connected with the main control module (400);

the sub-control module (705) is connected with the sub-storage module (706) by adopting an SPI interface or an FSMC interface;

the sub control module (705) is connected with the D/A output module (704) through an I2C bus or an SPI interface; the D/A output module (704) is respectively connected with the sub-voltage reference module (703) and the current pump module (707);

the current pump module (707) is connected with the current transformer module (709).

Further, the sub-storage module (706) is a FLASH chip or an EEPROM chip or a memory card.

Further, the sub-control module (705) is connected with the main control module (400) by adopting an IO line or a USART serial port.

Further, the sub-control module (705) and the main control module (400) are both STM32F103RBT6 chips.

Further, the channel module (700) further comprises a sub-trigger module (701);

the sub-trigger module (701) is respectively connected with the sub-control module (705) and the trigger module (500) through IO lines.

Further, a current monitoring module (708) is also included;

the current monitoring module (708) is respectively connected with the sub-control module (705) and the current transformer module (709) through IO lines.

Compared with the prior art, the utility model discloses an extensible possesses arbitrary ripples output function's electro photoluminescence ware who records has following beneficial effect:

1. the number of channels can be expanded, and the number of channels can be conveniently expanded on the premise of being supported by the power supply capability;

2. different from the traditional electrical stimulator, the stimulation waveform output by the channel of the stimulator can be edited at will, and the shape, amplitude and frequency of the waveform depend on the capacity of the neutron storage module in the channel module and the sampling rate of the D/A output module.

Additional features and advantages of the invention will be set forth in the description which follows, and in part will be obvious from the description, or may be learned by the practice of the invention. The objectives and other advantages of the invention will be realized and attained by the structure particularly pointed out in the written description and claims hereof as well as the appended drawings.

The technical solution of the present invention is further described in detail by the accompanying drawings and embodiments.

Drawings

Fig. 1 is a schematic structural view of an extensible electrical stimulator with an arbitrary wave output function according to an embodiment of the present invention.

Fig. 2 is a schematic structural diagram of a channel module according to an embodiment of the present invention.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without making creative efforts belong to the scope of the present novel protection.

Referring to fig. 1, an embodiment of the present invention provides an extensible electrical stimulator with an arbitrary wave output function, including: the system comprises a human-computer interaction module 100, a storage module 200, a communication module 300, a main control module 400, a trigger module 500, a power supply module 600 and a plurality of channel modules 700; wherein: the storage module 200 is connected with the main control module 400 through an I2C bus or an SPI interface or an FSMC interface; the main control module 400 is connected with the communication module 300 through a USART serial port or an SPI interface; and the main control module 400 is connected with the channel module 700 through an IO line; the communication module 300 is connected with the channel module 700 through an SPI interface, a USART serial port or an I2C bus; the power supply module 600 is connected to the storage module 200, the communication module 300, the main control module 400 and the channel module 700 through power lines.

Next, each of the above modules will be specifically described.

1. Human-computer interaction module 100

The human-computer interaction module 100 may be a liquid crystal screen with a touch function, or a liquid crystal screen without a touch function, a keyboard and a roller; in the embodiment of the present invention, the human-computer interaction module 100 selects a color medical liquid crystal display screen of DC80480M070 model, and has the function of a resistive touch screen; the man-machine interaction module 100 is connected with the main control module 400 through an SPI interface or a USART serial port or an IO line (interrupt line mode or level reading mode), and based on the connection, the man-machine interaction module 100 can be used for controlling the main control module 400 to be started; and the main control module 400 can be used for controlling the human-computer interaction module 100 to display the related information.

2. Memory module 200

The storage module 200 may be a FLASH chip or an EEPROM chip or a memory card (e.g., a TF card) or other hardware; the memory module 200 is connected to the main control module 400 through an I2C bus or an SPI interface or an FSMC interface, and based on this, the main control module 400 may be configured to read the waveform information stored in the memory module 200, or store the waveform information newly defined by the user into the memory module 200.

3. Communication module 300

The communication module 300 has communication functions of various communication forms, such as a USB communication function, a serial communication function, a 485 communication function, a network port communication function and the like, and can complete communication with a PC (personal computer) terminal based on the communication functions; the communication module 300 may also use CH340G to convert an external USB signal into UART communication;

the communication module 300 is connected with the main control module 400 through a USART serial port or an SPI interface and the like; based on this, the main control module 400 can be used to transmit the waveform information to the communication module 300; in addition, the main control module 400 may also acquire control information or downloaded waveform information sent by the computer software through the communication module 300 by using information interaction methods such as a USB interface, a USATR serial port, or an SPI interface;

communication module 300 is connected with channel module 700 through modes such as SPI interface or USART serial ports or I2C bus, and based on this, communication module 300 can be used to transmit waveform information to channel module 700.

4. Master control module 400

In the embodiment of the present invention, the main control module 400 is implemented by using STM32F103RBT6 chip;

the main control module 400 is connected with the human-computer interaction module 100 through an SPI interface or a USART serial port or an IO line (interrupt line mode or level reading mode), and based on this, the human-computer interaction module 100 can be used to control the main control module 400 to be turned on; the main control module 400 can be used for controlling the human-computer interaction module 100 to display the related information;

the main control module 400 is connected to the storage module 200 through an I2C bus or an SPI interface or an FSMC interface, and based on this, the main control module 400 may be configured to read waveform information stored inside the storage module 200, or store waveform information newly defined by a user into the storage module 200;

the main control module 400 is connected with the communication module 300 through a USART serial port or an SPI interface; based on this, the main control module 400 can be used to transmit the waveform information to the communication module 300; in addition, the main control module 400 may also obtain the control information or the downloaded waveform information sent by the computer software through the communication module 300 by using information interaction methods such as a USB interface, a USATR serial port, or an SPI interface;

because the communication levels between the main control module 400 and the channel module 700 are consistent, a communication chip can be omitted here, and the hard wire connection is directly used; the method comprises the following specific steps: the main control module 400 is connected with the channel module 700 through USART serial port or SPI interface, and based on this, the main control module 400 may be used to control the start/stop of the channel module 700, and meanwhile, the main control module 400 may be used to monitor the alarm state of the channel module 700; the main control module 400 may also be connected to the channel module 700 through at least 4 IO lines (interrupt line mode or level reading mode), where two directions are sent from the main control module 400 to the channel module 700 for controlling the start and stop of the channel module 700, and the other direction is sent from the channel module 700 to the main control module 400 for feeding back the alarm information of the channel; and finally 1 IO line is reserved.

5. Trigger module 500

The trigger module 500 forwards a trigger signal transmitted from the outside to each channel module 700 in a photoelectric coupling manner, and forwards the trigger signal transmitted by each channel module 700, so that cascade connection among multiple devices or connection with EEG acquisition equipment and the like is realized, and the functions of marking mark information and the like are realized; the method specifically comprises the following steps: a PC817 photoelectric coupler is adopted to realize voltage isolation, and a DQ trigger with a chip model number of SN74HC175D is adopted to realize capture of an external trigger signal; these functions can also be realized by means of SPI communication and the like;

the trigger module 500 is connected to the channel module 700 through at least two IO lines; the direction of one IO line is sent to the channel module 700 by the trigger module 500 for the external control channel module 700 to start, and the IO line is generally active at a high level; the other IO line direction is sent from the channel module 700 to the trigger module 500, for notifying the external device of the starting time of the channel, and the IO line is generally active at high level.

6. Power supply module 600

In the embodiment of the present invention, the power supply module 600 uses the switching power supply LM150-12a15 to generate ± 15V voltage, uses the golden rising LM15-23B05 to generate 5V voltage, and simultaneously uses the LM2937-3.3 to convert the 5V voltage into 3.3V voltage;

the power supply module 600 is respectively connected with the human-computer interaction module 100, the storage module 200, the communication module 300, the main control module 400, the trigger module 500 and the plurality of channel modules 700 through power lines and is used for supplying power to the modules;

7. channel module 700

The channel module 700 is used for receiving information from the communication module 300, the main control module 400 or the trigger module 500, and controlling the sub-modules therein to realize the output of stimulation signals and the safety monitoring in the stimulation process;

in an embodiment of the present invention, there are a plurality of channel modules 700; in a specific use process, the number of the channel modules 700 may be increased or decreased according to the needs of users, and the hardware structure of each channel module is completely the same, but the addresses of different channel modules are different. The main control module 400 communicates with the channel module 700 through the communication module 300 in a polling manner or a token ring manner, before communicating with a certain channel module, the main control module 400 firstly "calls" the address thereof, and when finding that the calling address does not accord with the address of the other channel modules, the other channel modules enter a "silent" state, and only the channel modules with the same address can perform information feedback. When the channel module is in an alarm state, the channel module may report information to the main control module 400 "urgently" through an IO line or the like.

The embodiment of the utility model provides an in above-mentioned various modules all adopt chip commonly used to connect through actual printed circuit board, promptly the utility model protects be the relation of connection between above-mentioned each module, based on the relation of connection between this each module, can assist relevant software to realize relevant function.

The embodiment of the utility model provides an in, the extensible possesses arbitrary ripples output function's theory of operation does: under the control of the human-computer interaction module 100, the main control module 400 reads the waveform information from the storage module 200 and sends the waveform information to the corresponding channel module 700 through the communication module 300; the channel module 700 processes the waveform information and generates a corresponding stimulation current signal; for the waveforms that have been currently stored in the channel module 700, the main control module 400 may directly control the output of the channel module 700 under the control of the human-computer interaction module 100; in this process, the main control module 400 is used to control the starting or stopping of the channel module 700, and the trigger module 500 may also be used to control the starting of the channel module 700.

The sub-modules in the channel module 700 will be described in detail below.

Referring to fig. 2, the channel module 700 includes a sub-trigger module 701, a sub-communication module 702, a sub-voltage reference module 703, a D/a output module 704, a sub-control module 705, a sub-storage module 706, a current pump module 707, a current monitoring module 708, and a current transformer module 709; wherein:

1. sub-trigger module 701

The sub-trigger module mainly comprises 74 series D triggers; the sub-trigger module 701 is connected to the trigger module 500 by an IO line or the like, and is configured to obtain a trigger signal (e.g., a start or stop signal) from the trigger module 500 or output the trigger signal to the trigger module 500.

The sub-trigger module 701 is connected with the sub-control module 705 through at least two IO lines and the like, wherein one IO line is sent from the sub-trigger module 701 to the sub-control module 705, based on this, the sub-trigger module 701 can send a start or stop signal to the sub-control module 705, so that the sub-control module 705 controls the channel module to start, and the IO line is generally high-level and effective; another IO line is sent from the sub-control module 705 to the sub-trigger module 701, and is used to notify an external module of the starting time of the channel module, where the IO line is generally active at a high level.

2. Sub-communication module 702

The sub-communication module 702 is connected with the main control module 400, and the sub-communication module 702 is connected with the sub-control module 705 through a USART serial port or an SPI interface; based on this, the sub communication module 702 may be configured to obtain the waveform information from the main control module 400, and forward the waveform information to the sub control module 705; in addition, the sub-communication module 702 can also be used to feed back internal information to the main control module 400.

3. Sub-voltage reference module 703

In an embodiment of the present invention, sub-voltage reference module 703 uses TL431 to generate a 3V reference voltage;

the sub-voltage reference module 703 is connected to the D/a output module 704 through a wire, and is configured to output a reference voltage signal (e.g., 2.048V) to the D/a output module 704, so as to serve as a voltage reference of the D/a output module.

4. D/A output module 704

The D/a output module 704 is connected to the sub-voltage reference module 703, and is configured to obtain reference voltage information from the sub-voltage reference module 703;

the D/A output module 704 is connected with the sub-control module 705 through an I2C bus or an SPI interface and the like, the sub-control module 705 sends the waveform information read in the sub-storage module 706 to the D/A output module 704 and controls the D/A output module 704 to output a stimulation voltage signal corresponding to the waveform information;

d/a output module 704 is connected to current pump module 707, based on which D/a output module 704 is operable to send a stimulation voltage signal to current pump module 707.

5. Sub control module 705

In the embodiment of the utility model, the sub-control module is realized by STM32F103RBT6, and all externally connected signal lines in the module are protected by TVS tubes and magnetic beads;

the sub-control module 705 is connected to the main control module 400 by using an IO line or a USART serial port, and is configured to receive a start/stop signal of the main control module 400 and feed back an alarm signal to the main control module 400; the sub-control module 705 is connected with an external module through at least 4 IO lines (1 is a spare line), wherein two directions are sent to the sub-control module 705 by the external module for controlling the starting and stopping of the channel module, and the other direction is sent to the external module by the sub-control module 705 for feeding back the alarm information of the channel;

the sub-control module 705 is connected to the sub-trigger module 701 through an IO line, and based on this, the sub-trigger module 701 may be configured to send the trigger information of the trigger module 500 to the sub-control module 705, and simultaneously feed back the relevant information of the sub-control module 705 to the trigger module 500;

the sub-control module 705 is connected with the sub-communication module 702 through a USART serial port or an SPI interface and the like; based on this, the sub-communication module 702 may be configured to send the waveform information sent by the main control module 400 to the sub-control module, and feed back the internal information of the channel module to the main control module 400 under the control of the sub-control module 705; in the interaction process of the sub-control module 705 and the sub-communication module 702, a common mode choke ACM2012H-900-2P-T05 is additionally used for protection;

the sub-control module 705 is connected to the D/a output module 704 through an I2C bus or an SPI interface, and is configured to control the D/a output module 704 to output a stimulation voltage signal;

the sub-control module 705 is connected with the sub-storage module 706 by using an SPI interface or an FSMC interface, and based on this, the sub-control module 705 can send the waveform information to the sub-storage module 706 for storage and read the waveform information in the storage module 706;

the sub-control module 705 is connected to the current monitoring module 708 by an IO line or the like, and is configured to obtain feedback information of the current monitoring module 708, so as to quickly handle an emergency situation that the output current of the channel exceeds the limit.

6. Sub-storage module 706

In the embodiment of the present invention, the sub-storage module 706 may be a FLASH chip or an EEPROM chip or a memory card (e.g., a TF card).

7. Current pump module 707

In the embodiment of the present invention, a circuit corresponding to the current pump module 707 is mainly constructed by 2 operational amplifiers and 4 high-precision resistors according to the principle of a Howland current pump;

the current pump module 707 is connected to the D/a output module 704, and configured to perform transconductance conversion on the stimulation voltage signal generated by the D/a output module 704 according to the Howland current pump principle to generate a stimulation current signal; meanwhile, in order to improve the current output capability of the current pump module 707, the current output capability of the current pump module 707 is increased by using a power amplifier or a push-pull circuit,

the current pump module 707 is connected to the current transformer module 709, and is configured to send the stimulation current signal to the current transformer module 709.

8. Current monitoring module 708

In the embodiment of the present invention, the current monitoring module 708 is mainly composed of a linear optocoupler HCNR201-500E, an operational amplifier OP07, and a voltage comparator TL 331B;

the current monitoring module 708 is connected with the current transformer module 709, and meanwhile, the current monitoring module 708 is also connected with the sub-control module 705 through an IO line and the like; based on this, the current monitoring module 708 may be configured to monitor the stimulation current sent by the current transformer module 709 in real time, and if the stimulation current exceeds the limit, the current monitoring module 708 may timely notify the sub-control module 705 through the IO line, so as to prevent the damage to the experimental object caused by the excessive current.

9. Current transformer module 709

The circuit corresponding to the current transformer module 709 mainly uses a current transformer (with low primary winding number and high secondary winding number) to realize the conversion from a large-current small-voltage signal to a small-current large-voltage signal.

The current transformer module 709 is respectively connected with the current pump module 707 and the experimental body, and is configured to transform the stimulation current signal generated by the current pump module 707 according to a basic principle of the current transformer, so as to change a low-voltage large current of the stimulation signal to a high-voltage small current; meanwhile, the transformation realizes the physical isolation of the contact part of the experimental body and the stimulation output part, and then outputs the result to the tested part of the experimental body. The current transformer module can be designed in a high-frequency transformer mode, can also be designed in an audio transformer mode, and finally needs to judge according to the bandwidth of a stimulation current signal to be output.

The working principle of the channel module 700 is as follows:

after the sub-control module 705 receives the start control signal of the main control module 400, each sub-module in the control channel module 700 starts to work; the sub-communication module 702 sends the waveform information sent by the main control module 400 to the sub-storage module 706 through the sub-control module 705 for temporary storage; then, the sub-control module 705 reads the waveform signal from the sub-storage module 706, and sends the waveform signal to the D/a output module 704, and at the same time, controls the D/a output module 704 to generate a stimulation voltage signal corresponding to the waveform signal; the D/a output module 704 sends the generated stimulation voltage signal to the current pump module 707, the current pump module 707 converts the stimulation voltage signal into a stimulation current signal, and sends the generated stimulation current signal to the current transformer module 709; the current transformer module 709 transforms the stimulation current signal to change the low-voltage large current of the stimulation signal to the high-voltage small current, and then outputs the transformed stimulation current signal to the experimental body. In order to ensure the safety of the experimental object when receiving stimulation, each channel module also monitors the stimulation current through the current monitoring module so as to prevent the current from damaging the experimental object greatly. In this way, experimenters can apply electrical stimulation signals of any stimulation waveform through the device described in this patent to meet the requirements of self-treatment/experimental research.

The arbitrary waveform index may be a waveform edited by the user, the waveform edited by the user may be a common triangular wave, a pulse wave, a sine wave, or an arbitrary waveform such as a trapezoidal wave, and the period of the waveform is mainly determined by the sampling rate of the D/a output module 704 and the capacity of the storage module. At present, the waveform cycle output with the sampling rate of 100k SPS and the maximum storage capacity of 8M bits can be theoretically realized, and the waveform cycle output is equivalent to a periodic signal of 40.96 s.

In the embodiment of the present invention, the start or stop signal from the trigger module 500 can be obtained through the sub-trigger module 701, and the start or stop signal is sent to the sub-control module 705, so that each sub-module in the control channel module 707 starts to operate.

In the embodiment of the present invention, since the sub-voltage reference module 703 and the sub-control module 705 have the same level, the sub-communication module 702 can be omitted; the sub-trigger module 701 is mainly composed of 74 series D-trigger chips 74HC175 and peripheral circuits thereof; since the stored waveform length is only 32kB, the sub-storage module 706 can be omitted and replaced with FLASH in the sub-controller module 705, where one data point information is stored every 2 bytes, so the maximum waveform length is 16k; since the sub-control module is used, 705 is the self-contained 12-bit DAC function in the chip, so that the D/A output module 704 can be omitted; based on this, the sub-voltage reference module 703 uses TL431 to generate a 3V reference voltage, and the reference voltage signal is directly inputted into the chip of the sub-control module 705; in order to generate bidirectional voltage signals, at the primary stage of the current pump module 707, a subtractor circuit based on an OP07 is used to convert the 0V to 3V signals output by the D/A into-1.5V to +1.5V signals; the current pump module 707 realizes a Howland current pump by using a power operational amplifier OPA541, converts a voltage signal output by a D/a into a current signal, and can directly output a current signal with a peak value of 6A because the OPA541 has a high-power push-pull structure therein; the current transformer module is composed of a high-frequency transformer, the number of turns and the wire diameter of the high-frequency transformer are deduced by calculating according to parameters such as the maximum current actually allowed to be output by a channel, the maximum current allowed to be input by the primary side of the current transformer module 709, the working efficiency of the current transformer module 709, the duty ratio of an output signal, the bandwidth of the transformer and the like according to an EE type framework, and then the high-frequency transformer is wound to realize the current transformer module; in order to meet the test requirement of the EMC, the key signals of the channel module are protected by TVS tubes, and the input ends of the operational amplifiers are clamped by 1N4148 to prevent the internal chips from being damaged by pulse voltage.

The embodiment of the utility model provides an extensible possesses arbitrary ripples output function's electro photoluminescence ware through being equipped with host system, passageway module, power module, human-computer interaction module, storage module and communication module, satisfies a great deal of requirement to the electro photoluminescence in clinical and the experiment. The embodiment of the utility model provides an in various modules all adopt chip commonly used to connect through actual printed circuit board, realize relevant function after the download program again. The embodiment of the utility model provides an in above-mentioned all connected mode have only influenced the communication form between each module to the theory of operation that does not change each module.

Although the present invention has been described with reference to the preferred embodiments, it will be understood by those skilled in the art that various changes and modifications may be made without departing from the spirit and scope of the invention, and the scope of the invention is to be determined by the appended claims.

Claims (10)

1. An expandable electrical stimulator having an arbitrary wave output function, comprising: the device comprises a storage module (200), a communication module (300), a main control module (400), a power supply module (600) and a plurality of channel modules (700); wherein:

the storage module (200) is connected with the main control module (400) through an I2C bus or an SPI interface or an FSMC interface;

the main control module (400) is connected with the communication module (300) through a USART serial port or an SPI interface; the main control module (400) is connected with the channel module (700) through an IO line or a USART serial port or an SPI interface;

the communication module (300) is connected with the channel module (700) through an SPI interface, a USART serial port or an I2C bus;

the power supply module (600) is respectively connected with the storage module (200), the communication module (300), the main control module (400) and the channel module (700) through power lines.

2. The expandable electrical stimulator with arbitrary wave output function according to claim 1, further comprising a human-computer interaction module (100);

the human-computer interaction module (100) is a liquid crystal screen of a DC80480M070 model;

the human-computer interaction module (100) is connected with the main control module (400) through an SPI interface or a USART serial port or an IO line;

the man-machine interaction module (100) is connected with the power supply module (600) through a power line.

3. The expandable electrical stimulator with arbitrary wave output function according to claim 1, wherein the memory module (200) is a FLASH chip or an EEPROM chip or a memory card.

4. An expandable electrical stimulator with arbitrary wave output function as claimed in claim 1, further comprising a trigger module (500);

the trigger module (500) adopts a PC817 photoelectric coupler to realize voltage isolation, and adopts a DQ trigger with a chip model of SN74HC175D to realize capture of an external trigger signal;

the trigger module (500) is connected with the channel module (700) through an IO line;

the trigger module (500) is connected with the power supply module (600) through a power line.

5. The scalable electrical stimulator with arbitrary wave output function as claimed in claim 4, wherein the channel module (700) comprises a sub communication module (702), a sub voltage reference module (703), a D/A output module (704), a sub control module (705), a sub storage module (706), a current pump module (707) and a current transformer module (709);

the sub-control module (705) is connected with the sub-communication module (702) through a USART serial port or an SPI interface; the sub-communication module (702) is connected with the main control module (400);

the sub-control module (705) is connected with the sub-storage module (706) by adopting an SPI interface or an FSMC interface;

the sub-control module (705) is connected with the D/A output module (704) through an I2C bus or an SPI interface; the D/A output module (704) is respectively connected with the sub-voltage reference module (703) and the current pump module (707);

the current pump module (707) is connected with the current transformer module (709).

6. The expandable electrical stimulator with arbitrary wave output function according to claim 5, wherein the sub-memory module (706) is a FLASH chip or an EEPROM chip or a memory card.

7. The expandable electrical stimulator with arbitrary wave output function according to claim 5, wherein the sub-control module (705) is connected to the main control module (400) by using an IO line or a USART serial port.

8. The expandable electrical stimulator with arbitrary wave output function according to claim 5, wherein the sub-control module (705) and the main control module (400) are STM32F103RBT6 chips.

9. An expandable electrical stimulator with arbitrary wave output functionality as claimed in claim 5, wherein the channel module (700) further comprises a sub-trigger module (701);

the sub-trigger module (701) is respectively connected with the sub-control module (705) and the trigger module (500) through IO lines.

10. The expandable electrical stimulator with arbitrary wave output functionality according to claim 5, further comprising a current monitoring module (708);

the current monitoring module (708) is respectively connected with the sub-control module (705) and the current transformer module (709) through IO lines.

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