TWM578576U - Detection and protection system for electric wheelchair - Google Patents

Abstract

A detection and protection system for an electric wheelchair is used to solve the problem that the conventional electric wheelchair causes user injury due to accidental touch. The system includes: a plurality of sensing units located on the foot pedal of an electric wheelchair, each sensing unit generates a detection data; a control unit is coupled to the sensing units, the control The unit receives the detection data, the control unit determines the use state of the electric wheelchair based on the detection data, and when the control unit determines that the electric wheelchair is in a dangerous state, the control unit generates a control signal; and a processing module , Coupled to the control unit, the control unit activates the processing module via the control signal, and the processing module operates the electric wheelchair into a shutdown state.

Description

Detection and protection system for electric wheelchair

This creation is about a safety protection mechanism for the use of electric wheelchairs, especially a detection and protection system for electric wheelchairs that prevents the user's feet from getting caught in the bottom of the electric wheelchair.

For the elderly and people with physical disabilities, manual wheelchairs are common and convenient mobile assistive tools. However, manual wheelchairs need to be pushed and pulled by human power. When used for a long time, they must rely on others to assist in care or push by themselves and are inefficient , And may cause excessive use of upper body muscles and injury, therefore, manual wheelchairs are a tool that is difficult for frail elderly and severe patients to use. However, as long as the user's consciousness is clear and the cognitive ability is normal, the system can easily control the electric wheelchair to move safely and autonomously and efficiently.

The above-mentioned conventional electric wheelchairs can adopt various control methods according to the user's physical conditions, such as: hand-push joystick, buttons, air blow, eye tracking and other action determination modes. However, most users of electric wheelchairs are physically weak , Slow response, and unable to control limb movements smoothly. Therefore, when the user has not fully seated in the electric wheelchair, the movement mechanism of the electric wheelchair may be accidentally triggered, causing the user to lose balance and fall, or, in the electric wheelchair During the process of travel, the user's body slipped and the feet were dragged to the ground, which caused injuries to the feet of the electric wheelchair that could not be stopped immediately.

In view of this, the conventional electric wheelchair does still need to be improved.

In order to solve the above-mentioned problems, the purpose of this creation is to provide a reconnaissance for electric wheelchairs The test protection system can prevent the user's feet from getting caught in the bottom of the electric wheelchair and being injured.

The next purpose of this creation is to provide a detection and protection system for electric wheelchairs, which can prevent accidental movement of electric wheelchairs caused by accidental touch.

Another purpose of this creation is to provide a detection and protection system for electric wheelchairs that can confirm that the user is fully seated in the electric wheelchair.

Another purpose of this creation is to provide a detection and protection system for electric wheelchairs, which can immediately stop the movement of electric wheelchairs in the event of danger.

The use of the quantifier "a" or "an" in the elements and components recorded in the entire text of this work is only for convenience and to provide the general meaning of the scope of the work; in this work, it should be interpreted as including one or at least one, and a single The concept of plural also includes the plural case, unless it obviously means otherwise.

The created detection and protection system for electric wheelchairs includes: several sensing units located on the foot pedals of an electric wheelchair, each sensing unit generates a detection data; a control unit , Coupled to the sensing units, the control unit receives the detection data, the control unit determines the use state of the electric wheelchair based on the detection data, when the control unit determines that the electric wheelchair is in a dangerous state, the The control unit generates a control signal; and a processing module coupled to the control unit, the control unit activates the processing module via the control signal, and the processing module operates the electric wheelchair into a shutdown state.

Accordingly, the detection and protection system for electric wheelchairs created by the author can detect the feet of the users of the electric wheelchairs through the sensing units located on the pedals of the electric wheelchairs. When a danger occurs, the operation of the electric wheelchair is stopped immediately, which can achieve the effect of avoiding continuous injury of the user and preventing the electric wheelchair from getting out of control and being damaged.

Wherein, the sensing unit is an infrared light interrupter, and the detection data is a voltage change value. In this way, it is possible to convert the positioning accuracy into an electrical signal, and it has a pair of feet that confirm the user Put the effect of location.

Wherein, when the voltage change value is less than a limit voltage value, the control unit determines that it is the dangerous state. In this way, it has the effect of judging whether the user is in a safe use state.

Wherein, the sensing unit is a pressure sensor, and the detection data is a pressure value. In this way, it can distinguish the sitting posture of the user, and has the effect of confirming whether the user is completely seated.

Wherein, when the pressure value is not detected by the sensing unit, the control unit determines that it is the dangerous state. In this way, it has the effect of judging whether the user's feet are in a safe state.

Wherein, when the magnitudes of the pressure values measured by the sensing units are not uniform, the control unit determines that it is the dangerous state. In this way, it has the effect of judging whether the user's center of gravity is balanced and suitable for traveling.

Wherein, the processing module suspends the power supply source of the electric wheelchair through a relay. In this way, it has the effect of preventing the user from accidentally touching and starting the movement of the wheelchair.

Wherein, the processing module reduces the traveling speed of the electric wheelchair or stops by a brake pad. In this way, it has the effect of stopping the movement immediately when the user is in danger.

1‧‧‧sensing unit

2‧‧‧Control unit

3‧‧‧Processing module

P‧‧‧ foot pedal

D‧‧‧Detection data

C‧‧‧Control signal

[Figure 1] A system block diagram of a preferred embodiment of the present invention.

[Figure 2] A combined perspective view of a preferred embodiment of this creation.

In order to make the above-mentioned and other purposes, features and advantages of this creation more obvious and understandable, the preferred embodiments of this creation are specifically described below, and in conjunction with the attached drawings, detailed descriptions are as follows: Please refer to Figure 1, It is the original detection and protection system for electric wheelchairs A preferred embodiment includes a plurality of sensing units 1, a control unit 2, and a processing module 3. The sensing units 1 are coupled to the control unit 2, and the control unit 2 is coupled to the Processing module 3.

Please refer to Figs. 1 and 2, the sensing units 1 can be located on each pedal P of an electric wheelchair, and each sensing unit 1 is used to detect the user of the electric wheelchair. Left and right feet, and generate a detection data D. The sensing unit 1 may be an infrared light interrupter. When the infrared light emitted by the sensing unit 1 is blocked, the sensing unit 1 may generate the detection data D as a voltage change value, or the sensing The unit 1 may also be a pressure sensor. The sensing unit 1 may generate the detection data D as a pressure value at which the foot steps on the foot pedal P, which is not limited in this creation.

The control unit 2 receives the detection data D of each of the sensing units 1, the control unit 2 can determine the use state of the electric wheelchair based on the detection data D, when the control unit 2 determines that the electric wheelchair is a dangerous In the state, the control unit 2 generates a control signal C. The dangerous state may be that the user's foot leaves the foot pedal P, or the user's slanted posture causes the wheelchair's center of gravity to shift, which may affect the safety of using the wheelchair.

The processing module 3 receives the control signal C sent by the control unit 2 and cuts off the power source of the electric wheelchair to prevent the electric wheelchair from being suddenly activated due to accidental touch; and when the electric wheelchair is traveling, the processing module 3 receives To the control signal C, the processing module 3 can also stop the electric wheelchair to prevent the electric wheelchair from continuously sliding or even overturning due to inertia.

According to the foregoing structure, the sensing unit 1 may be an infrared light interrupter. When the left and right feet of the user are placed in the correct position of the foot pedal P, the infrared light emitted by the infrared light interrupter can be effectively blocked And a limited voltage value is generated. Therefore, the control unit 2 can determine whether the user of the electric wheelchair has placed his feet completely by comparing the voltage change value measured by the sensing unit 1 with the limited voltage value in real time On the foot pedal P, when the voltage change value is significantly less than the limit When the voltage value is reached, the control unit 2 can determine that the user has not placed his feet correctly; in addition, the sensing unit 1 can also be a pressure sensor. When the user sits firmly in the electric wheelchair, the left and right feet are stepped When the two pressure sensors on the foot pedal P can measure similar and moderate pressure values, if the two pressure sensors do not detect the pressure value, the control unit 2 It can be judged that the user is not seated correctly, and if the two pressure sensors measure two pressure values with a significant drop in value, the control unit 2 can determine that the user's sitting center of gravity is shifted, which may cause the electric wheelchair Tilt overturned.

When the control unit 2 judges that the electric wheelchair is in a dangerous state, the control unit 2 generates the control signal C to activate the safety protection mechanism of the processing module 3, and the processing module 3 can stop the electric power by a relay The power supply source of the wheelchair can also reduce the travel speed of the electric wheelchair or even stop through the brake pads to ensure the safety of the user.

In summary, the detection and protection system for electric wheelchairs created by the author can detect the feet of the users of the electric wheelchairs through the sensing units located on the foot pedals of the electric wheelchairs. When the user is in danger, the operation of the electric wheelchair is stopped immediately, which can achieve the effect of avoiding continuous injury of the user and preventing the electric wheelchair from getting out of control and being damaged.

Although this creation has been disclosed using the above-mentioned preferred embodiments, it is not intended to limit this creation. Anyone skilled in this art can make various changes and modifications to the above-mentioned embodiments without departing from the spirit and scope of this creation. The technical scope protected by the creation, so the scope of protection of this creation shall be determined by the scope of the attached patent application.

Claims (8)

A detection and protection system for an electric wheelchair includes: a plurality of sensing units, the plurality of sensing units are located on a foot pedal of an electric wheelchair, each sensing unit generates a detection data; a control unit, coupled The plurality of sensing units are connected, the control unit receives the detection data, the control unit determines the use state of the electric wheelchair based on the detection data, and when the control unit determines that the electric wheelchair is in a dangerous state, the control unit A control signal is generated; and a processing module is coupled to the control unit, the control unit activates the processing module via the control signal, and the processing module operates the electric wheelchair into a shutdown state. The detection and protection system for an electric wheelchair as described in item 1 of the patent scope, wherein the sensing unit is an infrared light interrupter, and the detection data is a voltage change value. The detection and protection system for an electric wheelchair as described in item 2 of the patent application scope, wherein, when the voltage change value is less than a limit voltage value, the control unit determines that it is the dangerous state. The detection and protection system for an electric wheelchair as described in Item 1 of the patent scope, wherein the sensing unit is a pressure sensor, and the detection data is a pressure value. The detection and protection system for an electric wheelchair as described in item 4 of the patent application scope, wherein, when the pressure value is not detected by the sensing unit, the control unit determines that it is the dangerous state. The detection and protection system for an electric wheelchair as described in item 4 of the patent application scope, wherein when the pressure values measured by the sensing units are not uniform in size, the control unit determines that it is the dangerous state . The detection and protection system for an electric wheelchair as described in any one of items 1 to 6 of the patent application scope, wherein the processing module suspends the power supply source of the electric wheelchair by a relay. The detection and protection system for an electric wheelchair as described in item 7 of the patent scope, wherein the processing module reduces the traveling speed of the electric wheelchair or stops by a brake pad.