WO1998029851A1 - Foot weight alarm - Google Patents
Foot weight alarm Download PDFInfo
- Publication number
- WO1998029851A1 WO1998029851A1 PCT/US1996/020362 US9620362W WO9829851A1 WO 1998029851 A1 WO1998029851 A1 WO 1998029851A1 US 9620362 W US9620362 W US 9620362W WO 9829851 A1 WO9829851 A1 WO 9829851A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- weight
- corresponding digital
- force sensor
- digital value
- force
- Prior art date
Links
Classifications
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B5/00—Measuring for diagnostic purposes; Identification of persons
- A61B5/103—Detecting, measuring or recording devices for testing the shape, pattern, colour, size or movement of the body or parts thereof, for diagnostic purposes
- A61B5/1036—Measuring load distribution, e.g. podologic studies
Definitions
- the present invention relates generally to the field of foot weight alarm devices and, more specifically, to weight alarming devices capable of alarming an individual's weight without restricting the individual's movement.
- Detection of the weight applied to the lower extremities is achieved through the use of an external sensing device employing some type of means to convert the weight applied into a signal.
- an external sensing device can be a foot force sensor attached directly to the injured person's foot or inserted in, or in some manner attached to, his or her shoe.
- the signal is then conveyed to a device which communicates to the injured person whether a predetermined weight limit is reached.
- Such communication can be in the form of a sensory alarm; either visual, audible or tactile. In this way the injured person is advised that the weight being applied to the lower extremity is below, within or above a predetermined limit or desired weight range.
- the injured person can then increase or reduce the amount of weight being applied to the lower extremity.
- weight alarming devices There are a number of weight alarming devices currently known and in use. These devices communicate either an alarm “on” or “off' state based upon a single predetermined weight limit without the ability to communicate multiple weights or weight ranges, or to communicate certain percentages of a predetermined weight or weight ranges. Therefore, by the time the alarm actuates, the injured person is already at, and possibly has exceeded, the predetermined weight or weight ranges and may be sustaining damage to the lower extremity without any forewarning. Also, these devices do not communicate to the injured person that more weight should be placed on the lower extremity to encourage bone growth and healing.
- the present invention provides a device to satisfy the aforementioned needs. Accordingly, the present invention relates to a device for alarming foot weight comprising: a power supply, which provides a regulated voltage, at least one resistive force sensor connected to the power supply, signal conditioning means, calibrating means, programming means and alarm generating means. Each resistive force sensor has a resistance which varies with the amount of weight applied to it.
- the signal conditioning means is connected to each resistive force sensor wherein the signal conditioning means produces a voltage-corresponding digital value which varies with the resistance of the resistive force sensor.
- the calibrating means connected to the signal conditioning means converts the voltage-corresponding digital value into a force-corresponding digital value so that the force-corresponding digital value corresponds to the weight to which the foot force sensor is subjected.
- the programming means is connected to the calibrating means and sets at least one weight limit or weight range in the calibrating means so that the calibrating means can compare the force-corresponding digital value to the weight limit.
- Alarm generating means generates an alarm in response to the force-corresponding digital value which alarm varies depending on whether the force-corresponding digital value is below, within, or above the weight limit or weight range.
- FIG. 1 is a view of a foot in a shoe showing the positioning of the foot weight alarm device on the shoe including connection to the programming means.
- FIG. 2 is a logic diagram of the invention.
- FIG. 1 there is first shown a view of an individual's foot in a shoe "S" with the foot weight alarm device 10 comprising a foot force sensor 12, a connecting means 14, a housing 16, a shoe pouch 18, a data cable 20 and a programming means 22.
- the foot force sensor 12 is positioned inside the shoe “S”.
- the housing 16 is enclosed in the shoe pouch 18 which is attached to the top of the shoe "S”.
- the programming means 22 is a computer and is located externally to the housing 16.
- the data cable 20 connects the programming means 22 to the housing 16 and, advantageously, is detachable from the housing 16 and the programming means 22.
- FIG. 2 a logic diagram of the invention is shown.
- the foot force sensor 12 has at least one resistive force sensor 24 located thereon.
- a plurality of resistive force sensors 24 located in four areas of the foot force sensor 12 is shown, although it should be understood that only one resistive force sensor 24 is necessary.
- a power supply 26 which produces a regulated voltage is electrically connected by the connecting means 14 to each resistive force sensor 24.
- the power supply 26 is a battery and a voltage regulator.
- each resistive force sensor 24 varies with the amount of weight applied to that resistive force sensor 24 which, in turn, affects the voltage drop across that resistive force sensor 24. Accordingly, the voltage drop across each resistive force sensor 24 will vary in a corresponding fashion to the amount of weight applied to that resistive force sensor 24.
- Each resistive force sensor 24 is electrically connected by the connecting means 14 to the signal conditioning means 28. Due to the force-varying voltage experienced across the resistive force sensor 24, a force- varying voltage is present at the signal conditioning means 28. The signal conditioning means 28 converts this force-varying voltage to a voltage-corresponding digital value. In the present invention, this is accomplished by using an analog-to-digital converter 38.
- the force-varying voltage is amplified and buffered by the amplifier/buffer 40 prior to being converted, it is not always necessary to do so depending upon the type of analog-to-digital converter 38 employed.
- the voltage-corresponding digital value varies with the resistance of the resistive force sensor 24.
- the calibrating means 30 converts the voltage-corresponding digital value to a force- corresponding digital value. In the present invention, the calibrating means 30 accomplishes this by comparing the voltage-corresponding digital value of each resistive force sensor 24 with a set of values programmed by the programming means 22 into the calibrating means 30 as a linearization table 32. Based upon this comparison, the calibrating means 30 determines a force-corresponding digital value for each resistive force sensor 24 which corresponds to the weight applied thereto.
- Linear interpolation is used for inputs falling between two values in the linearization tables 32.
- the force- corresponding digital value corresponds to the weight to which the resistive force sensor 24 is subjected.
- the force-corresponding digital values of each resistive force sensor 24 are then combined to determine a force-corresponding digital value reflective of the total weight applied to the foot force sensor 12.
- the data cable 20 connects the calibrating means 30 to the programming means 22.
- the programming means 22 is used to set or reset at least one weight limit or weight range in units of, for example, pounds, kilograms, etc., based either on a percent of the person's body weight or on a specific unit, and to set the character of the alarm to be generated as the total weight applied to the foot force sensor 12 is below, within or above each weight limit or each weight range.
- the data cable 20 is then disconnected from the housing 16 to allow the individual unrestricted movement.
- the data cable 20 can also be used to transmit data to the programming means 22 in which event the programming means 22 can be used to display and/or analyze the data transmitted.
- Alarm generating means 34 generates an alarm or alarms in response to the force- corresponding digital value.
- the alarm or alarms can be generated when the force- corresponding digital value is below, within, or above the weight limit or weight range.
- the alarms generated may vary in volume, frequency and intermittency.
- Memory means 36 records both the time and the force-corresponding digital values experienced by the resistive force sensor 24 as may be determined through the use of the programming means 22.
- EXAMPLE 1 The invention, through the programming means 22, is programmed so that the alarm generating means 34 emits a low frequency tonal alarm when a minimal amount of weight, approximately two percent (2%) of total body weight, is applied to the foot force sensor 12; a high frequency tonal alarm when the applied weight on the foot force sensor 12 reaches about fifty percent (50%) of the total body weight and until it reaches about sixty percent (60%) of total body weight; and a two (2) tone steady warble when the applied weight exceeds sixty (60%) of total body weight. If the weight is reduced below any one of the above-stated percentages of weight the invention resets to the corresponding alarm for the lesser weight percentage and the alarm generating means 34 will emit alarms in the same manner if the weight is increased again.
- EXAMPLE 2 The invention, through the programming means 22, is programmed so that the alarm generating means 34 emits a repetitive short single-tone beep when the total amount of weight to which the foot force sensor 12 is subjected is between about forty percent 40%) and about fifty percent (50%) of total body weight; a repetitive double-tone beep between about fifty percent (50%) and sixty percent (60%) of total body weight; and a two (2) tone steady warble at more than about sixty percent (60%) of total body weight. The warble continues until the weight is reduced below sixty percent (60%) of total body weight. If the weight is reduced below any one of the percentages of weight the invention resets to the tonal alarm for the lesser weight percentage. The alarm generating means 34 will emit the alarms in the same manner if the weight is increased again.
- EXAMPLE 3 Similar to EXAMPLE 1 and EXAMPLE 2 except that instead of percentages of total body weight the invention is programmed through the programming means 22 to alarm based upon certain amounts of pounds being experienced by the foot force sensor 12
- EXAMPLE 4 The invention, through the programming means 22, is programmed so that the alarm generating means 34 emits a tonal alarm when, during any two (2) hour period, the following occurs:
- the weight applied to the foot force sensor 12 is equal to or exceeds (40) pounds for thirty (30) minutes; or
- the weight applied to the foot force sensor 12 is equal to or exceeds (30) pounds for (40) minutes; or
- the weight applied to the foot force sensor 12 is equal to or exceeds (20) pounds for fifty (50) minutes.
Abstract
Description
Claims
Priority Applications (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US08/415,630 US5619186A (en) | 1995-04-03 | 1995-04-03 | Foot weight alarm |
EP96944512A EP0946931A4 (en) | 1996-12-27 | 1996-12-27 | Foot weight alarm |
AU14295/97A AU1429597A (en) | 1996-12-27 | 1996-12-27 | Foot weight alarm |
PCT/US1996/020362 WO1998029851A1 (en) | 1995-04-03 | 1996-12-27 | Foot weight alarm |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US08/415,630 US5619186A (en) | 1995-04-03 | 1995-04-03 | Foot weight alarm |
PCT/US1996/020362 WO1998029851A1 (en) | 1995-04-03 | 1996-12-27 | Foot weight alarm |
Publications (1)
Publication Number | Publication Date |
---|---|
WO1998029851A1 true WO1998029851A1 (en) | 1998-07-09 |
Family
ID=26791425
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/US1996/020362 WO1998029851A1 (en) | 1995-04-03 | 1996-12-27 | Foot weight alarm |
Country Status (2)
Country | Link |
---|---|
US (1) | US5619186A (en) |
WO (1) | WO1998029851A1 (en) |
Cited By (4)
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EP1419734A1 (en) * | 2002-11-13 | 2004-05-19 | Fritz Minke GmbH & Co. KG | Foot overload monitoring device |
WO2016112229A1 (en) * | 2015-01-07 | 2016-07-14 | Nano Composite Products, Inc. | Shoe-based analysis system |
US10263174B2 (en) | 2013-03-15 | 2019-04-16 | Nano Composite Products, Inc. | Composite material used as a strain gauge |
US10260968B2 (en) | 2013-03-15 | 2019-04-16 | Nano Composite Products, Inc. | Polymeric foam deformation gauge |
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US6230501B1 (en) | 1994-04-14 | 2001-05-15 | Promxd Technology, Inc. | Ergonomic systems and methods providing intelligent adaptive surfaces and temperature control |
US5840047A (en) * | 1996-04-16 | 1998-11-24 | Prosthetic Sensing Technologies, Llc | Sensor device for monitoring a prosthetic device |
US5877687A (en) * | 1996-07-02 | 1999-03-02 | Bernard; Corinne | Weight distribution training system for skiers and the like |
US6174294B1 (en) * | 1996-08-02 | 2001-01-16 | Orbital Technologies, Inc. | Limb load monitor |
AU1429597A (en) * | 1996-12-27 | 1998-07-31 | Cleveland Medical Devices, Inc. | Foot weight alarm |
US6001023A (en) * | 1997-09-23 | 1999-12-14 | Richard D. Sanchez | Angle activated training device for golfers |
US6030351A (en) * | 1998-06-26 | 2000-02-29 | Cleveland Medical Devices Inc. | Pressure relief reminder and compliance system |
US6270432B1 (en) * | 1999-09-13 | 2001-08-07 | Linda T. Matlock | Tennis training and drilling device |
US6273863B1 (en) | 1999-10-26 | 2001-08-14 | Andante Medical Devices, Ltd. | Adaptive weight bearing monitoring system for rehabilitation of injuries to the lower extremities |
AT412254B (en) * | 2002-06-19 | 2004-12-27 | Heimo Dr Clar | DEVICE FOR MEASURING AND MONITORING THE PARTIAL LOAD OF ORTHOPEDIC AND ACCIDENTAL SURGERY PATIENTS |
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US6955094B1 (en) | 2003-07-18 | 2005-10-18 | Cleveland Medical Devices Inc. | Sensor for measuring shear forces |
US6915701B1 (en) | 2003-07-18 | 2005-07-12 | Cleveland Medical Devices Inc. | Composite material for a sensor for measuring shear forces |
US20060132314A1 (en) * | 2004-12-06 | 2006-06-22 | Sokrethya Sok | Safety alarm for use with footwear |
US20080167580A1 (en) * | 2005-04-05 | 2008-07-10 | Andante Medical Devices Ltd. | Rehabilitation System |
US9179862B2 (en) * | 2005-07-19 | 2015-11-10 | Board Of Regents Of The University Of Nebraska | Method and system for assessing locomotive bio-rhythms |
US7441436B2 (en) * | 2005-09-27 | 2008-10-28 | Mettler-Toledo, Inc. | Method for weighing apparatus calibration management |
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US20090227386A1 (en) * | 2008-03-07 | 2009-09-10 | Larry Dean Whitaker | Golf Swing Training Device |
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US8744783B2 (en) * | 2009-08-27 | 2014-06-03 | The United States Of America As Represented By The Secretary Of The Navy | System and method for measuring power generated during legged locomotion |
US8460218B2 (en) * | 2009-11-30 | 2013-06-11 | Randall Fenkell | Patient weight bearing monitor |
US8043173B2 (en) * | 2010-01-26 | 2011-10-25 | Nasrin Menalagha | Sports training system |
US10363453B2 (en) | 2011-02-07 | 2019-07-30 | New Balance Athletics, Inc. | Systems and methods for monitoring athletic and physiological performance |
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US9453772B2 (en) | 2011-03-24 | 2016-09-27 | MedHab, LLC | Method of manufacturing a sensor insole |
US10004946B2 (en) | 2011-03-24 | 2018-06-26 | MedHab, LLC | System and method for monitoring power applied to a bicycle |
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CN102715913A (en) * | 2012-07-12 | 2012-10-10 | 上海市第五人民医院 | Stress monitoring device for lower limb fracture rehabilitation patients |
US8915132B1 (en) | 2012-11-30 | 2014-12-23 | Physical Therapy Services, LLC | Visual warning device for weight bearing |
WO2014089331A1 (en) | 2012-12-06 | 2014-06-12 | Ossur Hf | Electrical stimulation for orthopedic devices |
US9568381B2 (en) | 2014-05-15 | 2017-02-14 | Henry J. Daniecki | Lower limb force sensing system |
DE102015108261A1 (en) | 2015-05-26 | 2016-12-15 | Edgar Emil Sinn | Device for generating a warning signal in case of excessive load on a leg of a patient |
DE202015102702U1 (en) | 2015-05-26 | 2015-06-23 | Edgar Emil Sinn | Device for generating a warning signal in case of excessive load on a leg of a patient |
EP4057865A4 (en) * | 2019-11-11 | 2023-12-20 | Orpyx Medical Technologies Inc. | Physiological sensor footwear insert system and method of manufacture |
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1996
- 1996-12-27 WO PCT/US1996/020362 patent/WO1998029851A1/en not_active Application Discontinuation
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US4928959A (en) * | 1988-12-16 | 1990-05-29 | Osteo-Dyne, Inc. | Method and device for providing active exercise treatment for a patient suffering from a bone disorder |
US5357696A (en) * | 1992-05-01 | 1994-10-25 | Gray Frank B | Device for measuring force applied to a wearer's foot |
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Cited By (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP1419734A1 (en) * | 2002-11-13 | 2004-05-19 | Fritz Minke GmbH & Co. KG | Foot overload monitoring device |
US10263174B2 (en) | 2013-03-15 | 2019-04-16 | Nano Composite Products, Inc. | Composite material used as a strain gauge |
US10260968B2 (en) | 2013-03-15 | 2019-04-16 | Nano Composite Products, Inc. | Polymeric foam deformation gauge |
US10658567B2 (en) | 2013-03-15 | 2020-05-19 | Nano Composite Products, Inc. | Composite material used as a strain gauge |
US11329212B2 (en) | 2013-03-15 | 2022-05-10 | Nano Composite Products, Inc. | Composite conductive foam insole |
US11874184B2 (en) | 2013-03-15 | 2024-01-16 | Nano Composite Products, Inc. | Composite conductive foam |
WO2016112229A1 (en) * | 2015-01-07 | 2016-07-14 | Nano Composite Products, Inc. | Shoe-based analysis system |
US10405779B2 (en) | 2015-01-07 | 2019-09-10 | Nano Composite Products, Inc. | Shoe-based analysis system |
US11564594B2 (en) | 2015-01-07 | 2023-01-31 | Nano Composite Products, Inc. | Shoe-based analysis system |
Also Published As
Publication number | Publication date |
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US5619186A (en) | 1997-04-08 |
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