GB2461016A - Controlling a Vehicles Speed based on a Detected Downward Inclination - Google Patents
Controlling a Vehicles Speed based on a Detected Downward Inclination Download PDFInfo
- Publication number
- GB2461016A GB2461016A GB0805389A GB0805389A GB2461016A GB 2461016 A GB2461016 A GB 2461016A GB 0805389 A GB0805389 A GB 0805389A GB 0805389 A GB0805389 A GB 0805389A GB 2461016 A GB2461016 A GB 2461016A
- Authority
- GB
- United Kingdom
- Prior art keywords
- cart
- slope
- detecting device
- walk
- inclination
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Withdrawn
Links
- QSHDDOUJBYECFT-UHFFFAOYSA-N mercury Chemical compound [Hg] QSHDDOUJBYECFT-UHFFFAOYSA-N 0.000 claims abstract description 9
- 229910052753 mercury Inorganic materials 0.000 claims abstract description 9
- 238000005096 rolling process Methods 0.000 claims abstract description 9
- 239000011324 bead Substances 0.000 claims description 9
Classifications
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61G—TRANSPORT, PERSONAL CONVEYANCES, OR ACCOMMODATION SPECIALLY ADAPTED FOR PATIENTS OR DISABLED PERSONS; OPERATING TABLES OR CHAIRS; CHAIRS FOR DENTISTRY; FUNERAL DEVICES
- A61G5/00—Chairs or personal conveyances specially adapted for patients or disabled persons, e.g. wheelchairs
- A61G5/04—Chairs or personal conveyances specially adapted for patients or disabled persons, e.g. wheelchairs motor-driven
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
- B60L15/00—Methods, circuits, or devices for controlling the traction-motor speed of electrically-propelled vehicles
- B60L15/20—Methods, circuits, or devices for controlling the traction-motor speed of electrically-propelled vehicles for control of the vehicle or its driving motor to achieve a desired performance, e.g. speed, torque, programmed variation of speed
- B60L15/2009—Methods, circuits, or devices for controlling the traction-motor speed of electrically-propelled vehicles for control of the vehicle or its driving motor to achieve a desired performance, e.g. speed, torque, programmed variation of speed for braking
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01C—MEASURING DISTANCES, LEVELS OR BEARINGS; SURVEYING; NAVIGATION; GYROSCOPIC INSTRUMENTS; PHOTOGRAMMETRY OR VIDEOGRAMMETRY
- G01C9/00—Measuring inclination, e.g. by clinometers, by levels
- G01C9/02—Details
- G01C9/06—Electric or photoelectric indication or reading means
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01C—MEASURING DISTANCES, LEVELS OR BEARINGS; SURVEYING; NAVIGATION; GYROSCOPIC INSTRUMENTS; PHOTOGRAMMETRY OR VIDEOGRAMMETRY
- G01C9/00—Measuring inclination, e.g. by clinometers, by levels
- G01C9/10—Measuring inclination, e.g. by clinometers, by levels by using rolling bodies, e.g. spheres, cylinders, mercury droplets
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/60—Other road transportation technologies with climate change mitigation effect
- Y02T10/64—Electric machine technologies in electromobility
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/60—Other road transportation technologies with climate change mitigation effect
- Y02T10/72—Electric energy management in electromobility
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Radar, Positioning & Navigation (AREA)
- Remote Sensing (AREA)
- Transportation (AREA)
- Power Engineering (AREA)
- Mechanical Engineering (AREA)
- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Animal Behavior & Ethology (AREA)
- General Health & Medical Sciences (AREA)
- Public Health (AREA)
- Veterinary Medicine (AREA)
- Hydraulic Control Valves For Brake Systems (AREA)
Abstract
A walk-substituting cart 1 such as a motorized wheelchair is equipped with a detecting device 2, such as a mercury switch (figs.4 and 5), tilt switch, gyroscope (figs 8 and 9) or a rolling ball switch (figs 6 and 7), which can detect the existence and measure the inclination of a downward slope that the cart is moving on; when the cart is moving down a slope, the detecting device is capable of sending a signal to a power source 3 of the cart causing the power source to automatically reduce thus slowing down the speed of the cart; Preferably the speed reduction correlates to the degree of inclination detected and on determining severe inclination the cart's braking system is additionally automatically engaged.
Description
DETECTING DEVICE FOR A WALK-SUBSTITUTING CART TO
AUTOMATICALLY SLOW DOWN WHEN MOVING DOWN SLOPE
BACKGROUND OF THE INVENTION
1. Field of the invention
The present invention relates to a detecting device of a walk-substituting cart, more particularly one, which will switch on for the walk-substituting cart to automatically reduce its speed on a downward slope, and which allows the brake mechanism of the cart to automatically start functioning on a slope of relatively large inclination.
2. Brief Description of the Prior Art
Electric walk-substituting carts are usually used by the elderly and physically disabled persons. When such a walk-substituting cart is is moving down a slope, it will move faster and faster to cause danger if the rider doesn't use the brake lever/pedal of the cart. And, it is relatively difficult for an elderly or physically disabled rider to continue pressing the brake lever/pedal with a proper amount of force a long time when the cart is moving down a slope. Therefore, the walk-substituting cart can fall over when moving down a slope.
The industry develops a warning device, which is installed on. a walk-substituting cart to warn the rider if the rider has ridden the cart onto a relatively deeply inclined slope. The warning device includes a central processor, an inclination detecting and measuring unit, and a warning unit; the central processor includes an inclination comparison circuit, and an amplifier, which are connected to the inclination detecting and measuring unit, and the warning unit respectively. The inclination detecting and measuring unit includes a holding member, a rolling bead in the holding member, a photoelectric switch, and a light source above the photoelectric switch; the rolling bead usually blocks light beams from the light source, and will roll away for light beams of the light source to switch on the photoelectric switch if the walk-substituting cart has moved onto a slope of relatively large inclination; thus, the inclination detecting and measuring unit will send a signal to the central processor, and in turn the warning unit will produce signals to warn the rider off the deeply inclined slope.
However, the rider will have to turn around or back the walk-substituting cart on a relatively inclined slope because the warning device can't detect the slope until the cart moves thereon; because it isn't very easy for the elderly and physically disabled persons to do so, danger still can happen. Therefore, the walk-substituting cart still isn't safe to ride down slope even if it is equipped with the warning device.
Therefore, it is a main object of the present invention to provide a detecting device to a walk-substituting cart to overcome the above problems, which will switch on for the cart to automatically reduce its speed on a downward slope.
SUMMARY OF THE INVENTION
A detecting device in accordance with an embodiment of the present invention is installed on a walk-substituting cart, and connected to a power source of the cart. The detecting device can detect the existence and measure the inclination of a downward slope that the walk-substituting cart is moving on; when the cart is moving down a slope, the detecting device will send a signal to the power source so that the power source can automatically slow down. Therefore, the rider won't have to continue operating the brake lever or the brake pedal of the walk-substituting cart a long time when the cart is moving down a slope.
BRIEF DESCRIPTION OF THE DRAWINGS
The present invention will be better understood by referring to the accompanying drawings, wherein: Fig. 1 is a perspective view of a walk-substituting cart according to the present invention, Fig. 2 is a side view of the walk-substituting cart, Fig. 3 is a side view of the walk-substituting cart going downhill, Fig. 4 is a view of a first preferred embodiment of the detecting device in the present invention, Fig. 5 is a view of the first preferred embodiment, taken when the cart is going downhill, Fig. 6 is a view of a second preferred embodiment, Fig. 7 is a view of the second preferred embodiment, taken when the cart is going downhill, Fig. 8 is a view of a third preferred embodiment, and Fig. 9 is a view of the third preferred embodiment, taken when the cart is going downhill.
DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS
Referring to Figs. 1 to 3, a walk-substituting cart 1 in accordance with the present invention is equipped with a detecting device 2, which can detect the existence and measure the inclination of a downward slope that the walk-substituting cart 1 is moving on. And, when the cart 1 is moving downhill, the detecting device 2 will send a signal to a power source 3 of the walk-substituting cart 1 so that the power source 3 can automatically slow down. The detecting device 2 can be installed on a footrest board of the cart 1.
Shown in Figs. 4 and 5 is a first preferred embodiment of the detecting device 2 of the present invention, which is a mercury switch (2a). The mercury switch (2a) contains a mercury lump, which will move to such a contacting position as to switch on the mercury switch (2a) in order for the mercury switch (2a) to send a signal to the power source 3 when the walk-substituting cart 1 is moving downhill; thus, the power source 3 begins to decelerate. Furthermore, at the same time, the mercury switch (2a) will measure the inclination of the downward slope so that the brake mechanism of the cart 1 will be automatically actuated if the inclination of the slope is relatively large. Therefore, the rider of the cart 1 won't have to continue operating the brake lever or the brake pedal of the cart 1 when the cart 1 is. moving down a slope; in other words, the present invention can provide more safety and convenience to the rider.
Shown in Figs. 6 and 7 is a second preferred embodiment of the detecting device 2 of the present invention, which is a rolling bead switch (2b). The rolling bead switch (2b) includes a bead, which will roll to such a position as to switch on the rolling bead switch (2b) when the walk-substituting cart 1 is moving downhill; thus, the rolling bead switch (2b) will send a signal to the power source 3 for the power source 3 to slow down. Furthermore, the rolling bead switch (2b) will measure the inclination of the slope so that the brake mechanism of the cart 1 can be automatically actuated if the slope has a very large inclination.
Shown in Figs. 8 and 9 is a third preferred embodiment of the detecting device 2 of the present invention, which is a gyroscope (2c).
The gyroscope (2c) will move into a tilted position as to switch on and send a signal to the power source 3 for the power source 3 to automatically slow down when the walk-substituting cart 1 is moving down a slope. Furthermore, the brake mechanism of the cart 1 will be * automatically actuated if the cart 1 is moving down a slope with a very large inclination.
The detecting device 2 can be a tilt switch, which will move into a tilted position as to switch on to send a signal to the power source 3 for the power source 3 to automatically slow down when the cart 1 is moving down a slope. Furthermore, the brake mechanism of the cart 1 will be automatically actuated if the cart 1 is moving down a slope with a very large inclination.
From the above description, it can be seen that the present invention has the following advantages over the prior art: 1. When one is riding the walk-substituting cart with the detecting device of the present invention down slope, he/she won't have to continue operating the brake mechanism of the cart a long time.
Therefore, the present invention provides more safety and convenience to the rider.
2. The detecting device of the present invention will measure the inclination of a slope that the walk-substituting cart is moving down so that the brake mechanism of the cart can be automatically actuated if the inclination of the slope is relatively large.
Claims (6)
- WHAT IS CLAIMED IS: 1. A detecting device for a walk-substituting cart to slow down when moving down a slope, the detecting device being installed on a walk-substituting cart to respond to a downward slope that the cart is moving along, thus sending a signal in order for a power source of the walk-substituting cart to decelerate.
- 2. The detecting device for a walk-substituting cart to slow down when moving down a slope as claimed in claim 1, wherein the detecting device measures an inclination of a downward slope, and an amount of speed reduction of the power source varies with the inclination of the downward slope.
- 3. The detecting device for a walk-substituting cart to slow down when moving down a slope as claimed in claim 1, wherein the detecting device is a mercury switch including a mercury lump capable of changing position in response to an inclination of a slope.
- 4. The detecting device for a walk-substituting cart to slow down when moving down a slope as claimed in claim 1, wherein the detecting device is a switch with a rolling bead capable of changing position in response to an inclination of a slope.
- 5. The detecting device for a walk-substituting cart to slow down when moving down a slope as claimed in claim 1, wherein the detecting device is a gyroscope.
- 6. The detecting device for a walk-substituting cart to slow down when moving down a slope as claimed in claim 1, wherein the detecting device is a tilt switch.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB0805389A GB2461016A (en) | 2008-03-25 | 2008-03-25 | Controlling a Vehicles Speed based on a Detected Downward Inclination |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB0805389A GB2461016A (en) | 2008-03-25 | 2008-03-25 | Controlling a Vehicles Speed based on a Detected Downward Inclination |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| GB0805389D0 GB0805389D0 (en) | 2008-04-30 |
| GB2461016A true GB2461016A (en) | 2009-12-23 |
Family
ID=39386686
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB0805389A Withdrawn GB2461016A (en) | 2008-03-25 | 2008-03-25 | Controlling a Vehicles Speed based on a Detected Downward Inclination |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB2461016A (en) |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0374111A (en) * | 1989-08-12 | 1991-03-28 | Matsushita Electric Works Ltd | Motor chair |
| JPH10328245A (en) * | 1997-06-04 | 1998-12-15 | Araco Corp | Inclination angle detector |
| EP1153590A2 (en) * | 2000-05-08 | 2001-11-14 | George Leitner | Variable-speed control for vehicle |
| JP2002262411A (en) * | 2001-02-28 | 2002-09-13 | Matsushita Electric Works Ltd | Speed-control device for electric vehicle |
| WO2005039473A2 (en) * | 2003-10-24 | 2005-05-06 | Sunrise Medical Hhg Inc. | Active stability wheelchair based on positive angle sensors |
| JP2005323431A (en) * | 2004-05-07 | 2005-11-17 | Atex Co Ltd | Travelling controller of small motor car |
-
2008
- 2008-03-25 GB GB0805389A patent/GB2461016A/en not_active Withdrawn
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0374111A (en) * | 1989-08-12 | 1991-03-28 | Matsushita Electric Works Ltd | Motor chair |
| JPH10328245A (en) * | 1997-06-04 | 1998-12-15 | Araco Corp | Inclination angle detector |
| EP1153590A2 (en) * | 2000-05-08 | 2001-11-14 | George Leitner | Variable-speed control for vehicle |
| JP2002262411A (en) * | 2001-02-28 | 2002-09-13 | Matsushita Electric Works Ltd | Speed-control device for electric vehicle |
| WO2005039473A2 (en) * | 2003-10-24 | 2005-05-06 | Sunrise Medical Hhg Inc. | Active stability wheelchair based on positive angle sensors |
| JP2005323431A (en) * | 2004-05-07 | 2005-11-17 | Atex Co Ltd | Travelling controller of small motor car |
Also Published As
| Publication number | Publication date |
|---|---|
| GB0805389D0 (en) | 2008-04-30 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| WAP | Application withdrawn, taken to be withdrawn or refused ** after publication under section 16(1) |