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Electrical stimulation walking-assisting device and output control method thereof

A technology of output control and electrical stimulation, applied in the field of medical equipment, to achieve the effect of ensuring accurate opening and closing

Active Publication Date: 2014-01-22
JIANGSU NEUCOGNIC MEDICAL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the process of the patient's foot lifting and / or knee bending is a shaking process. How to accurately judge the patient's foot lifting and / or knee bending process and properly control the electrical stimulation output signal is a problem to be solved by the electrical stimulation walking aid device.

Method used

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  • Electrical stimulation walking-assisting device and output control method thereof
  • Electrical stimulation walking-assisting device and output control method thereof
  • Electrical stimulation walking-assisting device and output control method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] An electrical stimulation mobility aid device, see figure 1 The electric stimulation walking aid device includes a gait sensor that changes high, medium, and low potential signals with the swing of the foot, a filter circuit that filters the gait sensor signal, and a signal output from the filter circuit. A microprocessor 4 that performs analog-to-digital conversion 3 and performs analysis and processing, and a pulse electrical stimulation circuit 5 controlled by the microprocessor.

[0036] The gait sensor in the embodiment is a three-axis acceleration sensor, and a three-axis acceleration sensor with a model of SMB380 or ADXL327 is adopted. The three-axis acceleration sensor has X, Y, Z axis potential value output. Taking the model ADXL327 three-axis acceleration sensor as an example, when the power supply voltage is 3 volts, the origin potential value of the X, Y, and Z axes is about 1.5 volts.

[0037] The microprocessor in the embodiment is a microprocessor with an anal...

Embodiment 2

[0040] This embodiment is an improvement on the basis of embodiment 1. For the same parts in this embodiment as embodiment 1, please refer to the content disclosed in embodiment 1 for understanding, and the content disclosed in embodiment 1 should also be regarded as this embodiment The content of the example will not be repeated here.

[0041] See figure 2 In order to make the circuit simple and effective at the same time, the filter circuit in this embodiment is composed of a resistor 2-1 and a capacitor 2-2. The resistor is connected in series between the amplifier circuit output and the analog-to-digital conversion input, and one end of the capacitor is connected Analog-to-digital conversion input, the other end of the capacitor is connected to the common ground, the resistance value is 32 kiloohms, and the capacitance value is 2 microfarads. Because this embodiment uses a three-axis acceleration sensor model ADXL327, its resistance is three-axis The internal resistance of t...

Embodiment 3

[0043] This embodiment is an improvement on the basis of embodiment 1. For the same parts in this embodiment as embodiment 1, please refer to the content disclosed in embodiment 1 for understanding, and the content disclosed in embodiment 1 should also be regarded as this embodiment The content of the example will not be repeated here.

[0044] The difference between this embodiment and the first embodiment is that the microprocessor is also connected to a pressure sensor 6 output by the start pulse electrical stimulation circuit installed on the sole of the affected foot, and the signal of the pressure sensor is output to the microprocessor.

[0045] The pressure sensor signal is wired or wirelessly connected to the microprocessor; after the patient wears the electrical stimulation walking aid device, he turns on the electrical stimulation walking aid device and starts walking; when the heel of the affected foot is lifted, the pressure sensor signal is changed from High becomes lo...

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PUM

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Abstract

The invention relates to an electrical stimulation walking-assisting device and an output control method thereof. The electrical stimulation walking-assisting device is fixed on a leg. The electrical stimulation walking-assisting device comprises a sensor, a filter circuit, a microprocessor and a pulse electrical stimulation circuit, wherein the sensor is used for forming the high, medium and low potential signal variation along with the back-and-forth swing of a foot; the filter circuit is used for filtering signals of the sensor; the microprocessor is used for carrying out analog-to-digital conversion and analysis treatment on a signal output by the filter circuit; and a pulse electrical stimulation circuit is controlled by the microprocessor. The method comprises the following steps: starting a power supply of the electrical stimulation walking-assisting device; determining a start output electrical stimulation signal threshold value; and starting and shutting down an electrical stimulation signal output. According to the invention, only the start threshold value needs to be set without setting a stop threshold value, so that the full-automatic control on the output of the electrical stimulation walking-assisting device is implemented and the convenience is also brought to a user; and the shaking interference generated when the user uses the electrical stimulation walking-assisting device is eliminated by utilizing two software and hardware modes, so that the accurate start and shutdown of the electrical stimulation signal are ensured and the electrical stimulation signal output of the walking-assisting device is ensured to be automatically stopped when the suffered foot falls on the ground.

Description

Technical field [0001] The invention belongs to the field of medical equipment, and particularly relates to an electrical stimulation walking assistance device and an output control method thereof. The state of the electrical stimulation walking assistance device is collected by an acceleration sensor, and the gait is affected by a filter circuit and changes in the amplitude of the upper and lower waveforms. The accurate judgment of the situation provides an accurate turn-on and turn-off signal for the electrical stimulation signal. Background technique [0002] Central nervous system diseases such as stroke, traumatic brain injury, spinal cord injury, and multiple sclerosis often cause symptoms such as foot drop and bent knees that affect walking. The patient showed that he was unable to dorsiflex his feet and / or knees. When walking, he dragged the sick foot or raised the lower limbs of the sick side higher, so the gait was slow, abnormal, poor stability, and unable to walk for ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): A61N1/36A61H3/00
Inventor 吴长旺
Owner JIANGSU NEUCOGNIC MEDICAL
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