CN113713250A - Stimulation device for human body multi-part feedback and intervention - Google Patents
Stimulation device for human body multi-part feedback and intervention Download PDFInfo
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Abstract
本发明公开了一种面向人体多部位反馈及干预的刺激装置，包括遥控器和长短可调连杆，在长短可调连杆两端安装有可旋转组件，在可旋转组件上通过曲度可连接杆至少设置一个以上的多模式融合刺激电极，在长短可调连杆内部，还设置有与遥控器通信的控制主板，可针对多种病患以及健康人群进行康复干预或是日常保健养生，且具备反馈系统，可以实时根据生物阻抗反馈调节刺激输出。
The invention discloses a stimulation device for feedback and intervention of multiple parts of the human body, comprising a remote control and a length-adjustable connecting rod. A rotatable component is installed at both ends of the length-adjustable connecting rod, and the rotatable component can be adjusted through a curvature. The connecting rod is equipped with at least one multi-mode fusion stimulation electrode. Inside the adjustable length of the connecting rod, there is also a control board that communicates with the remote control, which can be used for rehabilitation intervention or daily health care for a variety of patients and healthy people. And with a feedback system, the stimulation output can be adjusted in real time according to the bioimpedance feedback.
Description
Technical Field
The invention belongs to the field of medical instruments, and particularly relates to a stimulation device for multi-part feedback and intervention of a human body.
Background
In China, the disease conditions of diseases such as Parkinson's disease, Alzheimer's disease, cerebral palsy, cerebral apoplexy, autism, depression and the like show an increasing trend in recent years, and the diseases have no absolute treatment mode and are mostly treated by matching medicines. However, long-term administration of the medicine can cause dependence on the medicine and damage to the body of the patient. In recent years, with the attention of people on physical health, the comparative selection of treatment routes is particularly important, and both the curative effect and the side effect and the economic cost are considered. Under the condition, nerve Stimulation and regulation technology is gradually developed and matured, and a nerve regulation means represented by Deep Brain Stimulation (DBS) technology can effectively relieve clinical symptoms of a patient.
Transcranial Direct Current Stimulation (tDCS) is a non-invasive brain Stimulation method, and realizes neural regulation of the brain by inputting weak Current with constant amplitude into the brain through electrode medium. the tDCS has the advantages of being portable, noninvasive, low in price, good in treatment effect on specific nervous diseases and mental diseases (such as the diseases), and widely applied in clinic. the disadvantages of tDCS are that the stimulation site is not precise and cannot target the deep brain region, and in addition, tDCS is difficult to achieve precise stimulation and cannot achieve deep brain stimulation, which have important clinical significance for specific neurological and psychiatric diseases.
Transcranial Alternating Current Stimulation (tACS) is a non-invasive brain Stimulation method, and a Transcranial Stimulation electrode is used to inject weak single-frequency Alternating Current Stimulation Current into the brain so as to cause resonance of electrical activity of the brain in the frequency, further influence the state of the brain and realize neural regulation. the tACS and tDCS stimulation methods are the same, and accurate stimulation aiming at a certain deep brain region cannot be realized in the same way.
Time Interference (TI) Stimulation realizes Non-Invasive Brain Deep electrical Stimulation (NDBS), and Non-Invasive Stimulation of Brain Deep is realized by generating difference frequency low-frequency envelope of two high-frequency currents through Interference of two high-frequency sinusoidal currents with different frequencies in Brain Deep.
More than about half of the parkinson patients have a walking stoppage and the feet stick to the ground as if they were frozen, which is the so-called frozen gait, and the onset is even more severe in the middle and late stages of parkinson patients. Cerebral palsy children also have the clinical manifestations of gait abnormalities, which are caused by the damage of upper motor neurons of the patients, so that the spasm of limbs, the deformation of bones and the like are caused, and the gait abnormalities are further caused. Except for drug treatment, the nerve muscle can be effectively stimulated through vibration comprehensive therapy and relevant rehabilitation training, the growth of muscle and skeleton is promoted, and an ideal rehabilitation effect is achieved.
Cerebral apoplexy is a cerebrovascular disease seriously harming human health and life safety, and has the characteristics of high morbidity, high mortality and high disability rate. Dysphagia is one of the common sequelae after cerebral apoplexy, and the incidence rate of dysphagia is up to 56-78%. And for the patient after the cerebral apoplexy with dysphagia, an electrode is placed at the seventh cervical vertebra position behind the neck of the patient, or stimulation is carried out on acupuncture points such as Lianquan acupuncture point, Tiantu acupuncture point, Renyingacupuncture point and the like, so that the dysphagia of the patient can be greatly improved.
Aiming at daily health care and health preservation of healthy people, Guanyuan acupoint, Qihai acupoint, Zhongwan acupoint, Shenque acupoint, Zusanli acupoint, Sanyinjiao acupoint, Yongquan acupoint and the like are health preservation acupoints, although people often moxibustion without diseases and can not grow, the longevity can be preserved for hundreds of years ', moxibustion taste is dense, smoke is large, a user is easy to scald without experience, acupuncture has certain requirements on an acupuncture application technology, and moxibustion simulation and acupuncture electrical stimulation can also achieve health care effects.
With the rapid development of electronic information technology, various electronic devices develop towards high frequency, high speed, high sensitivity, high integration degree, high reliability and other directions, the electromagnetic environments for survival and work become more and more complex and severe, and the characteristics of criss-cross distribution of electromagnetic fields in a space domain, sudden and variable electromagnetic signals in a time domain, dense overlapping of electromagnetic frequency spectrum in a frequency domain and uneven power distribution in an energy domain are formed. The problem of electromagnetic interference facing electronic devices is becoming more and more severe, which puts high demands on the design and manufacture of electronic devices. The electromagnetic compatibility of a device refers to the ability of the device to ensure that it will not cause unacceptable or unexpected performance degradation due to electromagnetic emissions or responses under given operating conditions, and on the other hand, the electromagnetic interference generated by the device to the outside should be limited to a certain range. The electromagnetic compatibility of the device includes two aspects, namely the capability of resisting external electromagnetic interference on one hand and the limit of generating electromagnetic interference to the outside on the other hand.
The electrical stimulator is an electric device, the core design of the electrical stimulator is built by combining various digital-analog circuits, and the stability of the stimulation current determines the working effect of the device. However, in military or civil environments, the stimulating current is easily interfered by itself or outside electromagnetism to generate unstable phenomena such as drifting and shaking, and even saturation occurs under high-energy electromagnetic radiation such as high-power microwave and instantaneous pulse, which causes serious consequences. Electromagnetic compatibility is really very important for the proper safe use of medical equipment, but many designs rely only on a simple shielding enclosure and do not give this emphasis to disposal. For example, in the case of MRI, electromagnetic interference may affect the image to different degrees, which may directly affect clinical diagnosis and subsequent treatment, and in the case of stimulation devices such as cardiac pacemakers and electrical brain stimulators, the electromagnetic interference may cause the output of these devices to fluctuate unstably and even fail or generate micro-shocks, which endangers the life of the patient. Electromagnetic interference comes from itself on the one hand, non-idealities in the power supply and non-linear effects in the control circuit are conducted through the circuit into the conductors, forming common mode and differential mode interference. On the other hand, electromagnetic energy from the space is converted into interference current to enter the lead through the coupling effect of the field lines. In addition, conducted interference in the circuit may also cause damage to the power supply in turn, and the antenna-like structure in the circuit board may also generate radiation interference to the outside, which affects normal operation of other devices, and thus external interference of the electrical stimulator needs to be limited. Many designs are not considering the arrangement of the grounding return line of the signal, designers do not worry about the problem that the distance between the signal line and the return line is too far, or a plurality of signal lines adopt the same grounding return line, and often consider that the multi-purpose grounding return line is the waste of space occupation and cost, but the consideration has great influence on the electromagnetic compatibility problem of the equipment, even if certain protection measures are taken on the packaging shell of the equipment, the electromagnetic compatibility problem has different degrees of influence on human bodies in the actual use of the equipment. The electrical stimulation device provided by the prior patent usually does not pay attention to the technologies of electromagnetic shielding and electromagnetic interference, and does not test the safety of the electromagnetic absorption rate of the human body.
According to the research of the applicant, the existing tDCS and tACS devices cannot stimulate a specific deep brain region in a targeted and precise mode, and the deep brain stimulation capable of achieving a good effect is mainly invasive implantable stimulation, single-focus or even multi-focus devices related to time interference stimulation are extremely scarce, while multi-mode stimulation devices are mostly aimed at a specific disease, and are not assisted by peripheral stimulation, so that the application is very limited. Most equipment interactive with the user all adopts PC end or cell-phone end APP development to set up each parameter, but considers that user crowd has some to be old people, and old person's eyesight is not good, and this type of device of screen display is not friendly to old people, and the operation to computer end and cell-phone end will seem more labourious inconvenience moreover. Considering the outdoor use, the WIFI networking conditions may not be satisfied, so further consideration needs to be given to the user group and the use scene. The safety and stability of medical equipment are critical, and the use of products is problematic due to human static electricity or environmental electromagnetic interference, and the life of users is seriously and even more endangered. Therefore, the electrical stimulator with good electromagnetic compatibility is designed, a medical stimulation device suitable for multiple crowds is developed, attention is paid to daily health care of healthy crowds as well as patients, social convenience is greatly achieved, and burden is relieved.
Disclosure of Invention
In view of the above-mentioned drawbacks and deficiencies of the prior art, an object of the present invention is to provide a stimulation device for feedback and intervention of multiple parts of a human body.
In order to realize the task, the invention adopts the following technical solution:
a stimulation device for multi-part feedback and intervention of a human body comprises a remote controller and a long and short adjustable connecting rod, and is characterized in that rotatable components are mounted at two ends of the long and short adjustable connecting rod, at least more than one multi-mode fusion stimulation electrode is arranged on the rotatable components through the curvature connectable rod, is positioned at the far end of the curvature connectable rod and consists of an annular air bag, a stimulation electrode and a pressure sensor;
inside the adjustable connecting rod of length, still be provided with the control mainboard, the control mainboard includes microprocessor MCU, is connected with power module, voice system, electromagnetism atmospheric pressure valve switch, vibrations motor on the microprocessor MCU, and signal generator, bluetooth communication module and crash restart the system, wherein:
the power supply module is connected with a voltage boosting, stabilizing and back-pressure module; the signal generator is connected with the constant current module through the filtering voltage division module, and the constant current module is connected with the TVS parasitic capacitance cancellation circuit through the output interface;
the Bluetooth communication module is in interactive communication with the remote controller;
remote controller control system includes microprocessor MCU, is connected with power module, bluetooth communication module, display system, key-press system and mode selection module on the microprocessor MCU, wherein:
the power module is connected with a power main switch and a boosting and voltage stabilizing module, and the Bluetooth communication module is in interactive communication with the remote controller.
According to the invention, the multi-mode fusion stimulation electrode can be detached and combined.
Preferably, the structure of the stimulation electrode is divided into two parts: the first part of the surface array metal point electrodes are round pieces with the diameter of 1mm, the size of the first part of the surface array metal point electrodes is 30mm x 30mm, the first part of the surface array metal point electrodes is uniformly distributed on a ceramic substrate with the thickness of 1.6mm, the total number of the metal stimulation point positions is 48, and the second part of the surface array metal point electrodes is electrode leads communicated from all the surface array metal point electrodes to the ceramic substrate.
The vibration motor is a flat button type vibration motor.
Further preferably, the TVS parasitic capacitance cancellation circuit is composed of a transient diode D1, a diode D4, a transient diode D2 and a diode D3.
Compared with the prior art, the stimulation device for the feedback and intervention of multiple parts of the human body has the following beneficial effects:
1. can carry out rehabilitation intervention or daily health care and health preserving to many crowds, and possess feedback system, can be according to the feedback regulation stimulus output of bioimpedance in real time.
2. Performing peripheral vibration stimulation on the frozen gait of the Parkinson patient so as to improve intervention;
3. the abnormal gait of the cerebral palsy patient can be subjected to nerve regulation and control through electrical stimulation, so that part of cerebral nerves can recover normal functions, and the rehabilitation training can be carried out by combining peripheral vibration stimulation;
4. performing electrical stimulation on patients with dysphagia after stroke to improve swallowing conditions;
5. adopting TI deep brain stimulation aiming at the Alzheimer disease;
6. electrical stimulation intervention for autism and depression;
7. aiming at the daily health care of healthy people, such as stimulating or massaging Guanyuan acupoint, the health care tea can regulate consumptive disease and weakness; similarly, the Chinese medicinal composition has a good relieving effect on female dysmenorrheal, can play a role in reinforcing primordial qi by stimulating or massaging the Qihai acupoint, can improve the functions of spleen and stomach by stimulating or massaging the Zhongwan acupoint or Shenque acupoint, can promote digestion and absorption and enhance the resistance of people, can relieve female dysmenorrheal by stimulating or massaging the Sanyinjiao acupoint, can play a role in regulating the spleen and stomach and building body by stimulating or massaging the Zusanli, can play a role in activating blood and dissolving stasis, and guiding blood and returning meridian, and the like.
Drawings
FIG. 1 is a schematic structural diagram of a stimulation device for human body multi-site feedback and intervention;
FIG. 2 is a schematic diagram of a multimodal fusion stimulation electrode;
FIG. 3 is a block diagram of a control motherboard module;
figure 4 is a block diagram of a controller circuit;
FIG. 5 is a schematic view of the appearance of the control remote controller;
FIG. 6 is a block diagram of a current circuit design;
FIG. 7 is a specific circuit diagram according to FIG. 6;
FIG. 8 is a schematic diagram of a circuit inhibitor protection circuit;
FIG. 9 is a schematic diagram of the internal structure of the stimulation electrode;
FIG. 10 is a diagram of results of animal simulation for electromagnetic absorption rate SAR;
the invention is described in further detail below with reference to the figures and examples.
Detailed Description
In the following embodiments, the current outputs for the respective stimulation modes are designed according to the human body safety current.
A first part: stimulation device overall design for human body multi-part feedback and intervention
The stimulation device for human body multi-part feedback and intervention is shown in fig. 1. The device comprises a remote controller and an adjustable length connecting rod 1, wherein rotatable components 2 are installed at two ends of the adjustable length connecting rod 1, at least more than one multi-mode fusion stimulation electrode 4 is arranged on the rotatable components 2 through a curvature connectable rod 3, and the multi-mode fusion stimulation electrode 4 is positioned at the far end of the curvature connectable rod 3 and consists of an annular air bag 5, a stimulation electrode 6 and a pressure sensor;
inside adjustable length connecting rod 1, still be provided with the control mainboard, the control mainboard includes microprocessor MCU, is connected with power module, voice system, electromagnetism atmospheric pressure valve switch, vibrations motor on the microprocessor MCU, and signal generator, bluetooth communication module and crash restart the system, wherein:
the power supply module is connected with a voltage boosting, stabilizing and back-pressure module; the signal generator is connected with the constant current module through the filtering voltage division module, and the constant current module is connected with the TVS parasitic capacitance cancellation circuit through the output interface;
the Bluetooth communication module is in interactive communication with the remote controller;
remote controller control system includes microprocessor MCU, is connected with power module, bluetooth communication module, display system, key-press system and mode selection module on the microprocessor MCU, wherein:
the power module is connected with a power main switch and a boosting and voltage stabilizing module, and the Bluetooth communication module is in interactive communication with the remote controller.
The stimulation device for the feedback and intervention of multiple parts of the human body provided by the embodiment can perform targeted stimulation and intervention on more parts of the human body, such as the parts of the neck, the waist, the legs, the arms and the like.
The attaching degree of the multi-mode fusion stimulation electrode is controlled by the embedded air bag 5 and the pressure sensor, the specific design is as shown in fig. 2, the annular air bag 5 and the stimulation electrode 6 mainly complete the adjustment of the attaching tightness degree of the multi-mode fusion stimulation electrode and the stimulation position, and the whole attaching process can be adjusted in a self-adaptive mode. The function of self-adaptive adjustment is realized by an algorithm embedded in the MCU of the processor, the pressure of inflation and deflation of the annular air bag 5 is determined, air pressure control is completed by an electromagnetic air pressure valve switch, and the function of self-adaptive adjustment has the advantages of wearing comfort, firmness and the like.
The stimulation device for human body multi-part feedback and intervention of the embodiment has two stimulation classifications: the electric stimulation and the vibration stimulation are used for controlling the operation of the main board to be interactively communicated with the remote controller by taking the Bluetooth communication module as an intermediary.
The design block diagram of the remote controller is shown in fig. 4, and the appearance schematic diagram of the remote controller is shown in fig. 5, and the remote controller comprises a panel on which a display is arranged. Upper, lower, left and right keys, OK key and number keys. A delete key (x), an electrical stimulation mode dial, a shock mode switch, an adaptive pinch button, etc.
For the design, the phenomena of static electricity, surge and the like have great instantaneous energy, can seriously interfere the normal working state of the stimulator, even can cause the damage of the whole circuit and possibly cause the injury of treatment to users, so the high standard and high requirement of the use stability of the medical instrument are considered, the requirement is provided for the electromagnetic compatibility of the stimulation device facing the human body multi-part feedback and intervention in the embodiment at the beginning of the design, the problems of electromagnetic interference resistance, human body static electricity resistance and the like are considered, the sensitive part is reinforced, and the stimulation device runs through the design all the time.
The electromagnetic compatibility of the equipment comprises two aspects, namely the capacity of resisting external electromagnetic interference on one hand, the limit of generating electromagnetic interference on the other hand, the addition of a TVS parasitic capacitance counteracting circuit, the design of a crash restart system and the simulation verification of the electromagnetic absorption rate of a human body. In addition, the convenience of the system in use and operation is considered, a device controller similar to a remote controller is adopted, and a voice prompt function is added, so that the system is convenient for multiple people to use.
When the stimulation device facing the multi-part feedback and intervention of the human body is used, the multi-mode fusion stimulation electrodes can be selected and combined, namely, a pair of multi-mode fusion stimulation electrodes 4 (such as a TI stimulation mode) with the same stimulation mode are arranged on the curvedness connectable rod 3 to perform TI stimulation.
When another stimulation mode is needed, the unnecessary multi-mode fusion stimulation electrodes 4 (such as TI stimulation mode) can be detached from the curved connectable rods 3, and then the multi-mode fusion stimulation electrodes 4 (such as tACS mode) of other modes are replaced according to the requirement, and tACS mode stimulation is carried out, and the operation is carried out according to the following specific requirements:
firstly, aiming at common electrical stimulation:
1. turning on a main switch of the remote controller, and carrying out voice prompt to 'welcome use, please select a proper mode', wherein a user dials a six-gear switch for controlling a corresponding electrical stimulation mode on the remote controller, and carrying out voice prompt to 'please select a proper mode', and combines screen display to select a needed stimulation mode: TI stimulation mode, tACS mode, tDCS mode, acupoint electrical stimulation mode, user-defined stimulation mode and impedance feedback stimulation mode (the default of the system is the impedance feedback stimulation mode);
2. and (3) combining a display system and a key system on the remote controller, setting parameters such as stimulation amplitude, frequency, stimulation duration, waveform (related only in a user-defined mode) and the like required according to display operation, pressing an OK key to confirm after the setting is finished, starting stimulation after the voice prompt of 'stimulation start', finishing the stimulation when the stimulation is finished, and automatically turning off the power supply after five minutes.
Secondly, aiming at the electrical stimulation mode of the acupuncture points:
1. turning on a main switch of the remote controller, and prompting 'welcome use, please select a proper mode' by voice, and selecting a required acupuncture point electrical stimulation mode by combining screen display;
2. the voice prompts 'please select a wearing part', one of a neck, a chest lower edge, a waist, thigh legs and shank legs is selected by combining screen display, wherein the neck corresponds to an acupuncture point Dazhui acupoint, the chest lower part corresponds to an acupuncture point Zhongwan acupoint, the waist corresponds to a Qihai acupoint, a Shenque acupoint, a Guanyuan acupoint and the like, the thigh legs correspond to a Xuehai acupoint and the like, and the shank legs correspond to Zusanli, Sanyinjiao and the like;
3. the voice prompts ' please select the acupuncture point to be stimulated ', after the needed acupuncture point is selected, the self-adaptive contraction ' button on the remote controller is pressed, namely, the stimulation device facing to the feedback and the intervention of the human body multi-part of the embodiment can search the nearest electrode position according to the embedded algorithm and adjustMulti-mode fusionSynthetic stimulationThe position of the electrode 4 is moved to the acupuncture point, the movement is completed through the long and short adjustable connecting rod 1 and the rotatable component 2, dynamic adjustment can be carried out in multiple dimensions, after the voice prompt that the acupuncture point is determined and stimulation is started, and the stimulation fixed-point stimulation parameters are adjusted in strength according to the difference of the individual biological impedance of the second part.
Thirdly, aiming at the peripheral vibration stimulation mode:
1. the peripheral vibration stimulation mode is used in cooperation with the electrical stimulation mode: the main switch of the remote controller is turned on, the voice prompts ' welcome use, please select a proper mode ', the vibration mode switch on the remote controller is turned on after the electrical stimulation parameters are set, the voice prompts ' vibration mode, vibration starts ' and vibration starts ', the vibration motor utilizes a flat button type vibration motor which is a permanent magnet motor and can be directly linearly controlled through alternating current, noise and unstable states in the vibration process are reduced, and the vibration strength is determined according to the individual body fat rate.
2. The peripheral vibration stimulation mode was used alone: the main switch for controlling the remote controller is turned on, the user is prompted to welcome the user and please select a proper mode, the vibration mode switch is directly turned on, the vibration mode is prompted through voice, vibration starts, vibration can be started through independent vibration, different strengths can be selected, the user can select the vibration according to body feeling of the user, and the vibration frequency interval is adjusted between 120Hz and 200 Hz. In addition, in order to secure safety of physical tolerance, one shaking period is set to 10 min.
The two multi-mode fusion stimulation electrodes form a complete loop, the thickness of each layer of tissue of a human body, including skin, fat, bones, brain tissue and the like, can be detected, and then the stimulation intensity is self-adaptively adjusted through the tissue thicknesses of different individuals, so that the impedance feedback stimulation function is completed.
A second part: self-adaptive human body acupuncture point detection method of multi-mode fusion stimulation electrode
The embodiment also provides a self-adaptive human body acupuncture point detection method of the multi-mode fusion stimulation electrode. The acupuncture diagnosis and treatment practice in China has been for thousands of years, and the acupuncture diagnosis and treatment device has good diagnosis and treatment effects. Although the approximate positions of the acupoints are relatively determined, the search for the acupoints becomes an urgent problem to be solved due to individual differences of sex, age, body type and the like. The voltage, current, conductivity and biological impedance of human body on the skin surface of the acupuncture points on the meridians of human body are different from those of common skin. The main points are as follows:
1) measured on the surface of the skin, almost all acupuncture points have the characteristics of low resistance and high potential;
2) when the electrical characteristics of the acupoints change, the physical state changes, which is mainly manifested as disease;
3) the electrical characteristics of the acupuncture points are hardly affected by the external environment, but are affected by the skin moisture.
The self-adaptive human acupuncture point detection method of the multi-mode fusion stimulation electrode 4 provided by the embodiment comprises the following specific steps:
1) the multi-mode fusion stimulation electrode 4 is used for collecting the voltage, the current, the conductivity and the bioimpedance of the position under different frequencies, the parameters are input into an unsupervised learning model, and four categories of gender, height, age and body fat are output. Based on a depth confidence network (DBN) to judge whether the nonlinear dependence relationship between body components in different body types can be used for judging the positions of acupuncture points and common positions. For example, a first layer of learning is performed using a DBN multi-layer model.
2) Extracting the characteristics of each category, namely the data transmission characteristics of different working carrier frequencies corresponding to the heights, body fat, arm length, waist circumference, arm circumference, body components and the like of different users, such as voltage gain, current change, stimulation time delay of different point positions of the patch, scattering parameters and other characteristics, and determining the bioimpedance threshold of indexes such as current attenuation, voltage gain, bioimpedance difference and the like according to the requirements of the stimulation position. The extracted data features are used as input to a second hidden layer of the deep belief network.
3) And classifying by combining the parasitic capacitance of the human body and other electrophysiological signals to establish an acupuncture point position model.
4) The length-adjustable connecting rod 2 and the rotatable component 3 are used for carrying out the fine adjustment of the multi-mode fusion stimulation electrode 4, and the stimulation position is accurately positioned.
It should be noted that, in addition to multi-label classification using deep belief networks, other types of neural networks may be used, such as feed-forward neural networks and wavelet neural networks.
And a third part: integrated design of stimulation electrodes
Referring to fig. 8, the electrode substrate of the stimulation electrode 6 is formed by a multi-layer printing structure. The electrode substrate is made of alumina ceramic (Al) as the main material2O3) Relative dielectric constant εrThe alumina ceramic material has the characteristics of high hardness, strong durability and good insulation property, namely 9.8. In addition, in the medical industry, the ceramic material has the characteristics of corrosion resistance, friction resistance and no sensitization, and is very suitable for being used as a substrate of an electrode contacting the skin, and the metal stimulation point of the stimulation electrode 6 is made of copper. In this embodiment, the specific parameters of the branched structure are shown in FIG. 8, and the electrode substrate parameters are 30mm × 30mm × 1.6 mm.
At present, most stimulator electrodes adopt a Rogers plate or metal as a substrate, and after a patient uses the stimulator electrodes for a long time, bacteria are easy to breed, anaphylactic reaction occurs and the like. The stimulation electrode 6 designed in this embodiment is made of a skin-friendly alumina ceramic material, which has a wide application in medical materials, and is specifically represented as follows:
firstly, the material has good biocompatibility and is not easy to cause rejection reaction. Therefore, the material is widely applied to human tissue substitute materials and the like.
Secondly, the alumina ceramic material is compact, and is a good physical antibacterial surface.
And the alumina ceramic material has good tensile property and is suitable for long-term rehabilitation treatment.
As shown in fig. 9, the structure of the stimulating electrode 6 is divided into two parts as viewed from the feeding position: the metal point electrodes are arrayed on the surface of the first part, the size of each metal point electrode is a circular sheet with the diameter of 1mm, the circular sheets are uniformly distributed on a ceramic substrate with the thickness of 1.6mm and the diameter of 30mm multiplied by 30mm, and the total number of the metal point electrodes is 48. The second part is an electrode lead which is communicated from each surface array metal point electrode to the ceramic substrate. Having good electrical properties mainly in the stimulation range.
The fourth part: optimizing current circuit and performing electromagnetic compatibility design
1. The block diagram of the current circuit is designed as shown in fig. 6, and the current circuit is divided into four parts, namely a pre-stage amplifying circuit, a Howland current pump, a bridge and a secondary amplifying and output stage. The power supply current is amplified by low power consumption and low input bias current in the front-stage amplification circuit, so that the input stability of the input current is ensured in the amplification process. Although the input current is kept as stable as possible during the pre-amplification, the current flowing through the load changes with the change of the overall resistance, and therefore, the output current is further rectified by the Howland current pump circuit so as not to change with the tissue. The current then goes into the bridge and the secondary amplification, the resistive bridge acting to provide the rate of change of resistance of the output of the preceding stage to the operational amplifier, facilitating the measurement, while the operational amplifier C will further amplify the input of the preceding stage. And finally, inputting the current after secondary amplification into a first input bias current amplifier for amplification to enable the current to become the current suitable for the stimulation electrode, and outputting the current to the stimulation electrode through an output port and the TVS parasitic capacitance cancellation circuit. Finally acts on the human body part needing stimulation. The actual current circuit design is shown in fig. 7.
2. For medical devices, the TVS itself has parasitic capacitance, which can cause current offset during the operation of the stimulation electrode 6, and in order to ensure the accurate operation of the stimulation electrode 6, a TVS parasitic capacitance cancellation circuit is added between the output port of the current circuit and the stimulation electrode 6. The circuit consists of a transient diode D1(TVS), a diode D4, a transient diode D2(TVS), and a diode D3 (as shown in fig. 8). The transient diode (TVS) suppression protection capability calculation method follows: pppm ═ clamp voltage × transient peak current.
3. Reasonable wiring, grounding and filtering are carried out on the actual design of the circuit. The wiring takes into account the signal and its return path and provides a suitable return path to prevent crosstalk of noise signals to the operating signal. The signal lines correspond to respective grounding return lines as much as possible, the distance between the signal lines and the grounding return circuit is not too far, otherwise, the loop antenna formed by the signal lines and the grounding return circuit is larger, and the grounding return lines are arranged nearby the signal lines, so that external radiation emission and external interference in receiving of the loop antenna can be avoided to a great extent. Furthermore, the common impedance of the multiple signal line pairs sharing the return ground line may interfere with each other.
4. The mechanical structures of the circuit board and the equipment and the installation positions of various connectors are reasonably arranged.
Since the mechanical structure is adjustable and adaptive, the connection cables are all flexible thin cables. The advantages are that: 1. can adapt to repeated bending; 2. the weight is light, and the wearing is suitable; 3. the transmission loss is small; 4. the cost is low.
In addition, the substrate material of the control mainboard is selected from a glass fiber epoxy resin copper clad laminate (FR-4A1) which has stable size and relative dielectric constant epsilonr4.4, bending resistance, flame retardance and excellent insulating properties.
5. The design adopts a shielding microstrip line for the transmission of the stimulating current.
The microstrip line is a transmission line composed of a conductor strip embedded in a dielectric substrate and having a certain width. The method is suitable for integrated circuit transmission of multi-channel signals and current. The device has the characteristics of small volume, light weight, high reliability and low cost, and is very suitable for the design of medical instruments. In the embodiment, the ceramic substrate is designed to be coated with the copper microstrip line, so that the ceramic substrate is suitable for transmission of physiological electrical signals and stimulating current, the shielding performance of the signals can be ensured, and the mutual interference during multi-channel transmission can be reduced to the minimum.
The fifth part is that: safety design
As shown in fig. 9, in order to ensure the safety of the stimulation device for human body multi-site feedback and intervention in this embodiment, the applicant simulated in SIM4LIFE biomedical electromagnetic simulation software, the multi-mode fusion stimulation electrode 4 was attached to the back of the rat model for stimulation, and the electromagnetic absorption rate of each site of the rat was analyzed by multiple times of stimulation with different powers (5W-10W), and the peak value was 4.59e-26W/Kg, far below the international safety limits, tableThe stimulation device for the multi-part feedback and intervention of the human body has excellent safety.
Claims (5)
1. A stimulation device for multi-part feedback and intervention of a human body comprises a remote controller and a long and short adjustable connecting rod (1), and is characterized in that two ends of the long and short adjustable connecting rod (1) are provided with rotatable components (2), at least more than one multi-mode fusion stimulation electrode (4) is arranged on the rotatable components (2) through a curvature connectable rod (3), and the multi-mode fusion stimulation electrode (4) is positioned at the far end of the curvature connectable rod (3) and consists of an annular air bag (5), a stimulation electrode (6) and a pressure sensor;
inside adjustable connecting rod of length (1), still be provided with the control mainboard, the control mainboard includes microprocessor MCU, is connected with power module, voice system, electromagnetic pressure valve switch, vibrations motor on the microprocessor MCU, and signal generator, bluetooth communication module and crash restart the system, wherein:
the power supply module is connected with a voltage boosting, stabilizing and back-pressure module; the signal generator is connected with the constant current module through the filtering voltage division module, and the constant current module is connected with the TVS parasitic capacitance cancellation circuit through the output interface;
the Bluetooth communication module is in interactive communication with the remote controller;
remote controller control system includes microprocessor MCU, is connected with power module, bluetooth communication module, display system, key-press system and mode selection module on the microprocessor MCU, wherein:
the power module is connected with a power main switch and a boosting and voltage stabilizing module, and the Bluetooth communication module is in interactive communication with the remote controller.
2. The stimulation device for human body multi-site feedback and intervention according to claim 1, wherein the multi-mode fusion stimulation electrode (4) is detachable and combinable.
3. The stimulation device for multi-part feedback and intervention of the human body as claimed in claim 1 or 2, wherein the structure of the stimulation electrode (6) is divided into two parts: the first part of the surface array metal point electrodes are round pieces with the diameter of 1mm, the size of the first part of the surface array metal point electrodes is 30mm x 30mm, the first part of the surface array metal point electrodes is uniformly distributed on a ceramic substrate with the thickness of 1.6mm, the total number of the metal stimulation point positions is 48, and the second part of the surface array metal point electrodes is electrode leads communicated from all the surface array metal point electrodes to the ceramic substrate.
4. The stimulation device for body-oriented multi-site feedback and intervention of claim 1, wherein the vibration motor is a flat button-type vibration motor.
5. The stimulation device for human body multi-site feedback and intervention as recited in claim 1, wherein the TVS parasitic capacitance cancellation circuit is composed of a transient diode D1, a diode D4, a transient diode D2 and a diode D3.
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