US20060234842A1 - Measuring device - Google Patents

Measuring device Download PDF

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Publication number
US20060234842A1
US20060234842A1 US11/456,088 US45608806A US2006234842A1 US 20060234842 A1 US20060234842 A1 US 20060234842A1 US 45608806 A US45608806 A US 45608806A US 2006234842 A1 US2006234842 A1 US 2006234842A1
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United States
Prior art keywords
load
weight
mass
weights
unit
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.)
Abandoned
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US11/456,088
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English (en)
Inventor
Kojiro Minami
Masato Nagatomi
Takuya Nakano
Daisuke SHIJO
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Konami Sports Club Co Ltd
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Konami Sports Life Corp
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Filing date
Publication date
Application filed by Konami Sports Life Corp filed Critical Konami Sports Life Corp
Assigned to KONAMI SPORTS LIFE CORPORATION reassignment KONAMI SPORTS LIFE CORPORATION ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: MINAMI, KOJIRO, NAGATOMI, MASATO, NAKANO, TAKUYA, SHIJO, DAISUKE
Publication of US20060234842A1 publication Critical patent/US20060234842A1/en
Abandoned legal-status Critical Current

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    • A—HUMAN NECESSITIES
    • A63—SPORTS; GAMES; AMUSEMENTS
    • A63B—APPARATUS FOR PHYSICAL TRAINING, GYMNASTICS, SWIMMING, CLIMBING, OR FENCING; BALL GAMES; TRAINING EQUIPMENT
    • A63B24/00—Electric or electronic controls for exercising apparatus of preceding groups; Controlling or monitoring of exercises, sportive games, training or athletic performances
    • A—HUMAN NECESSITIES
    • A63—SPORTS; GAMES; AMUSEMENTS
    • A63B—APPARATUS FOR PHYSICAL TRAINING, GYMNASTICS, SWIMMING, CLIMBING, OR FENCING; BALL GAMES; TRAINING EQUIPMENT
    • A63B21/00—Exercising apparatus for developing or strengthening the muscles or joints of the body by working against a counterforce, with or without measuring devices
    • A63B21/06—User-manipulated weights
    • A63B21/062—User-manipulated weights including guide for vertical or non-vertical weights or array of weights to move against gravity forces
    • A63B21/0626—User-manipulated weights including guide for vertical or non-vertical weights or array of weights to move against gravity forces with substantially vertical guiding means
    • A63B21/0628—User-manipulated weights including guide for vertical or non-vertical weights or array of weights to move against gravity forces with substantially vertical guiding means for vertical array of weights
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01G—WEIGHING
    • G01G19/00—Weighing apparatus or methods adapted for special purposes not provided for in the preceding groups
    • G01G19/14—Weighing apparatus or methods adapted for special purposes not provided for in the preceding groups for weighing suspended loads
    • A—HUMAN NECESSITIES
    • A63—SPORTS; GAMES; AMUSEMENTS
    • A63B—APPARATUS FOR PHYSICAL TRAINING, GYMNASTICS, SWIMMING, CLIMBING, OR FENCING; BALL GAMES; TRAINING EQUIPMENT
    • A63B2220/00—Measuring of physical parameters relating to sporting activity
    • A63B2220/10—Positions
    • A63B2220/13—Relative positions

Definitions

  • the present invention relates to a measuring device for a training device.
  • Some training devices comprise a measuring device for measuring the exercise state of a trainee.
  • a conventional training device which comprises a measuring unit for counting the number of weights a trainee lifts and the number of times that he/she lifts them. The number of weights and the number of times the weights are lifted are counted with the measuring unit that is arranged in the training device, by means of a detecting unit that is arranged in each weight, and a plurality of detected units, which face the detecting units and are arranged in the main body of the training device.
  • a trainee lifts the weights, each of the detecting units in the weights being lifted passes in front of each of the detected units of the main body.
  • the measuring unit counts the number of the detecting units that pass in front of the detected units, and the number of times that these units pass by, and displays to the trainee the total amount of weight he/she is using and the number of times that he/she lifts them.
  • a first aspect of the present invention provides a measuring device for a training device including a weight, an elongated member that is connected to one end of the weight, and a load generating unit for moving the weight upwards by moving the other end of the elongated member.
  • the measuring device comprises a position detecting unit for detecting the position of the weight; a load detecting unit for detecting a load that is applied to the elongated member; and a display unit for displaying report data based on the detection data obtained by the position detecting unit and the load detecting unit.
  • Each of the position detecting unit, the load detecting unit, and the display unit has an attachment portion which allows each unit to be detached from the training device.
  • the elongated member includes an elongated thin object such as a wire, an object that is flat in cross-section such as a belt, or the like, so long as it is flexible and extends from the load generating unit to the weight.
  • the weight is connected to the elongated member, and the load generating unit moves the weight in conjunction with movements of the other end of the elongated which a trainee moves.
  • a load is applied to the elongated member by the weight, and a trainee exercises by using the load applied to the elongated member.
  • a training device that has a weight connected to one end of the elongated member, and has a moving portion such as a pedal, a handle, a bar, and the like at the other end of the elongated member. With this training device, a trainee exercises by applying force to the moving portion so as to change the position of the moving portion.
  • a position detecting unit, a load detecting unit, and a display unit that comprise a measuring device can be attached to a training device by means of the attachment portion, and allow a trainee to see report data based on the position of the weight and the load applied to the elongated member during his/her exercise.
  • the report data may include the position of the weight, the number of the movements of the weight, the movement distance of the weight from an initial state, the acceleration of the weight, the load applied to the elongated member, the mass of the weight, and the like, for example. Therefore, a trainee can see his/her exercise status during an exercise.
  • a second aspect of the present invention provides a measuring device according to the first aspect, further comprising a reflecting unit for reflecting light, which is arranged on the upper surface of the weight, wherein the position detecting unit has a light emitting portion for emitting light to the reflecting unit, and a light receiving portion for receiving reflected light from the reflecting unit.
  • the reflecting unit is provided on the top surface of the weight, and light is emitted from the light emitting portion toward the reflecting unit. Then, the reflected light which is reflected at the reflecting unit is received by the light receiving portion. The position of a spot of the reflected light received on the light receiving portion changes depending on the distance between the light emitting portion and the reflecting unit. The position of the weight having the reflecting unit can be calculated by measuring the change in the position of the spot.
  • a third aspect of the present invention provides a measuring device according to the first or second aspect, wherein the load detecting unit can be attached to the elongated member, and has a distortion receiving portion for receiving the tension applied to the elongated member, and a distortion measuring portion for measuring the distortion of the distortion receiving portion.
  • the distortion receiving unit provided for the elongated member is distorted in accordance with the amount of tension applied to the elongated member by the weight.
  • a tension applied to the elongated member can be measured by measuring the distortion of the distortion measuring portion. Then, a load applied to the elongated member can be detected based on the tension.
  • a fourth aspect of the present invention provides a measuring device according to any of the first to third aspects, further comprising a data processing unit for performing data processing in order to display report data on the display unit, based on detected data obtained by the load detecting unit and the position detecting unit, wherein the data processing unit has a position monitoring unit for monitoring changes in the position of the weight based on the detected data detected by the position detecting unit, a load monitoring unit for monitoring changes in a load based on the detected data detected by the load detecting unit, and a mass calculation unit for calculating the mass of the weight based on the changes in the position of the weight and the changes in the load.
  • the weight is connected to the elongated member, and the position of the weight changes depending on the movement of the other end of the elongated member.
  • the load is applied to the elongated member by the weight.
  • the position monitoring unit of the measuring device monitors changes in the position of the weight.
  • a change in the position of the weight means that the weight is moving or is stopped.
  • the load monitoring unit monitors the load which is applied to the elongated member by the weight.
  • F is the load applied to the pedal 5
  • m is the mass of the weight connected to the pedal 5
  • ⁇ is the acceleration of the weight
  • g is the acceleration due to gravity.
  • the position of the weight changes in accordance with movements of the other end of the elongated member, and the load applied to the elongated member changes in accordance with a change in the acceleration ⁇ .
  • F is nearly equal to mg (F ⁇ mg) because the acceleration ⁇ is nearly equal to 0 ( ⁇ 0).
  • the load F includes a dynamic load Fa and a static load Fs.
  • the dynamic load Fa is the load that is applied to the elongated member when the position of the weight is changing, and the weight is moving with acceleration.
  • the static load Fs is the load that is applied to the elongated member when the weight is stopped, or when the weight is moving at a constant speed (acceleration ⁇ of the weight ⁇ 0), which is represented as F ⁇ mg.
  • the mass calculating unit calculates the mass of the weight, based on the changes in the position of the weight and the load applied to the elongated member.
  • the acceleration ⁇ of the weight is monitored based on the changes in the position of the weights, and the mass of the weight is calculated based on the load that is applied to the elongated member when the weights are stopped and the acceleration ⁇ of the weight is nearly equal to 0 ( ⁇ 0).
  • the mass of the weight is calculated based on the acceleration ⁇ of the weight which is detected when the weight is moving according to the above-described formula (1).
  • the measuring device can calculate the mass of the stopped weight and display the above-mentioned data on the display unit as well as detect the load which is applied to the elongated member.
  • the load being lifted by the trainee is displayed. For example, the more the weight is moved vigorously, the larger the displayed value of the load will become. Consequently, this gives a trainee incentive to work out.
  • the mass of the weight is displayed.
  • the measuring device provides excellent operability in that a trainee does not have to look at the weight itself as he/she does with a conventional weight training machine, and a trainee can easily check the mass of the weight which is being used at present, the number of times he/she performed a movement in a work out, and the like by just looking at the display while maintaining his/her training position.
  • a fifth aspect of the present invention provides a measuring device according to the fourth aspect, wherein the mass calculation unit calculates the mass of the weight based on a load detected by the load monitoring unit, and displays the mass on the display unit when the position monitoring unit detects that the weight has stopped after movement of the weight.
  • the state in which the weight is stopped includes a situation in which the movement of the weight completely stops. It also includes a situation in which the speed and acceleration of the weight remain below a predetermined value.
  • the position of the weight is moving upwards and downwards due to the reciprocating movement of the other end of the elongated member, the position of the weight will stop when the weight is located at the uppermost position or the lowermost position.
  • the acceleration ⁇ of the weight is nearly equal to 0 (acceleration ⁇ 0). Therefore, the load F applied to the weight is represented as the static load Fs nearly equal to mg (Fs ⁇ mg) according to the above-described formula (1), and the mass of the weight can be calculated by detecting the static load Fs.
  • the state in which the weight is stopped includes a situation in which the weight is almost stopped as well as a situation in which the weight is completely stopped.
  • the mass of the weight is calculated as mentioned above when the position monitoring unit detects the weight has stopped so that that the actual mass of the weight can be accurately calculated. If the weight is calculated when it is moving, a load in accordance with acceleration of the movement will be added to the mass of the weight.
  • an accurate measurement of the mass is realized by coupling the functions of the position monitoring unit, the load monitoring unit, and the mass calculating unit.
  • a sixth aspect of the present invention provides a measuring device according to the fourth or fifth aspects, wherein the data processing unit further comprises a mass storing unit for storing mass data concerning weight which can be used in the training device, and the data mass calculation unit extracts from the mass storing unit the value closest to the mass of a weight calculated based on the change in the position of the weight used the training device and the load applied to the elongated member.
  • the data processing unit further comprises a mass storing unit for storing mass data concerning weight which can be used in the training device, and the data mass calculation unit extracts from the mass storing unit the value closest to the mass of a weight calculated based on the change in the position of the weight used the training device and the load applied to the elongated member.
  • Data on the mass of the actual weight which will be used is stored in the mass storing unit in advance.
  • An accurate mass of the weight can be obtained by extracting data on the mass of the actual weight which is closest to the mass of the weight which is calculated by the mass calculating unit.
  • the calculated data of the weight includes errors and the like. Therefore, if the calculated data is displayed on the display unit without any corrections, the data being displayed will vary for each training session, even if a trainee works out with a same load, and will result in an unclear standard for the trainee. Therefore, to prevent the abovementioned problem, the calculated data is adapted to the data on the mass of the actual weight.
  • a seventh aspect of the present invention provides a measuring device according to the sixth aspect, wherein the mass data includes data on the mass of a single weight which can be used in the training device, and mass data for multiples of the single mass data.
  • a training load for a training device such as a weight training machine is changed by changing the number of weights which have the same weight. Therefore, it is possible to apply the measuring device to this type of training device by including data on the mass of a single weight, and data on a mass which is calculated by multiplying the mass of the single weight by an integer corresponding to the number of the weights. Furthermore, the mass of a single weight may be changed depending on the training device, and the data includes the mass of a plurality of single weights which are prospectively assumed to be used, and the mass calculated by multiplying the mass of one weight by an integer. As mentioned above, the storage capacity of the mass storing unit can be kept low with no waste by limiting the mass data to the necessary and minimum data.
  • a measuring device provides a cost advantage to a fitness center and the like, because the device can be easily attached afterwards to an existing training device that does not have a measuring portion for measuring the number of times that a trainee has performed a movement in a work out and the like.
  • the mass of the weight is calculated based on the load applied to the wire or the like which pulls the weight, a trainee does not have to look at the weight itself in order to check the mass of the weight.
  • a trainee can check the number of the times he/she has performed a movement in a work out and the like as well as the mass of the weight by just looking at the display. Therefore, the measuring device provides excellent operability for a trainee, because he/she does not have to move unnecessarily.
  • FIG. 1 shows the configuration of a measuring device and a training device.
  • FIG. 2 shows the configuration of a training device to which a measuring device is attached.
  • FIG. 3 is an explanatory diagram showing the operation of the weights of the training device.
  • FIG. 4 shows a method for measuring the position of the weights by the position sensor.
  • FIG. 5A is an enlarged perspective view of the load sensor.
  • FIG. 5B is an enlarged perspective view of the load sensor observed from the opposite side of FIG. 5A .
  • FIG. 6A is a cross-sectional view of the load sensor before a load is applied to the wire.
  • FIG. 6B is a cross-sectional view of the load sensor after a load is applied to the wire.
  • FIG. 7 shows the appearance of a monitor of the measuring device.
  • FIG. 8 is an explanatory diagram showing that the weights are moving in the direction of the arrows from the lowest position to the uppermost position of the training device.
  • FIG. 9 is an explanatory diagram showing a method for counting the number of movements of the weight.
  • FIG. 10A shows the relationship between a load F and a time t.
  • FIG. 10B shows the relationship between a load F and a time t.
  • FIG. 10C is an enlarged view of a portion of FIG. 10A .
  • FIG. 11 is an exercise status (1) to be shown on a display of the monitor.
  • FIG. 12 is an exercise status (2) to be shown on a display of the monitor.
  • FIG. 13 is an exercise status (3) to be shown on a display of the monitor.
  • FIG. 14 is a flow chart showing the flow of calculating a mass of a weight and the number of movements of the weight.
  • a measuring device of the present invention is installed in a training device, and comprises a weight(s), a wire (corresponding to an elongated member) having a first end connected to the weight, and a load generating unit configured to move the weight upwards by moving the second end of the wire.
  • the load generating unit moves the weight in conjunction with force which a trainee applies to the other end of the wire by means of his/her legs or hands.
  • a load is applied to the wire by the weight, and a trainee exercises using the load applied to the wire.
  • a moving portion such as a pedal, a handle, a bar, and the like may be connected to the second end of the wire.
  • the measuring device detects the position of the weight, the load applied to the wire, and the like, and displays report data based on the detected data to a trainee on a monitor. Therefore, a trainee can determine his/her exercise routine, such as the number of movements of the weight and the exercise time, based on the report data displayed on the monitor.
  • the measuring device has a simple structure in that it is not necessary to build the device into a training device, and the measuring device is detachable, for example, it can be attached to an existing training device afterward, and the like.
  • the measuring device detects the load which is applied to the wire by means of the weight in conjunction with exercise. Then, the measuring device calculates the mass of the weight connected to the wire based on the load. Therefore, the load applied to a trainee can be detected without providing a detecting unit(s) or a detected unit(s) corresponding to the number of weights. In addition, it is not required to measure the mass of weight in advance because it is calculated based on the detected load. Therefore, the measuring device according to the present invention can be attached easily to a training device and can calculate the mass of the weight being lifted.
  • FIG. 1 is a block diagram showing the configuration of a measuring device 150 and a training device 100 .
  • the training device 100 to which the measuring device 150 is attached is located, for example, in a facility such as a fitness club, and connected to a server 300 in the facility.
  • the server 300 is connected to the measuring device 150 and receives the exercise state of a trainee, which is obtained by the measuring device 150 .
  • the server 300 transmits personal data about a trainee that is stored in the server 300 in response to requests from the measuring device 150 .
  • FIG. 2 is a block diagram showing the configuration of the training device 100 to which the measuring device 150 is attached.
  • the training device 100 has a structure in which a trainee pushes a pedal with his/her feet to move the weight upwards and downwards, and a load will in turn be applied to his/her legs.
  • the training device 100 is only illustrative and is not limited thereto.
  • a backrest 3 and a seat 4 are fixed to a support board 1 .
  • a pedal 5 is movably fixed to the support board 1 , facing the backrest 3 .
  • a handle 17 is provided so as to support a trainee during exercise.
  • a wire 9 , a rod 11 , and a plurality of weights 13 are attached to a frame 7 .
  • the weights 13 are connected to the wire 9 , sliding upwards and downwards along the rod 11 .
  • the wire 9 connects the weights 13 and the pedal 5 through a plurality of pulleys 15 .
  • each of the plurality of the weights 13 has a weight adjustment hole 13 a .
  • the weights 13 into which the adjustment bar 13 b is inserted and the weights on top thereof are connected to the wire 9 as shown FIG. 3 . Therefore, a trainee can adjust the load which the weights 13 apply to the pedal 5 by inserting the adjustment bar 13 b into a desired position.
  • the wire 9 may be configured to connect the weights 13 and the pedal 5 , and to move the weights 13 by moving the pedal 5 , but is not limited to a wire.
  • the member that connects the weights 13 and the pedal 5 can be a long thin object such as a wire, an object that is flat in cross-section such as a belt, or the like, so long as it is flexible and long enough to extend between the pedal 5 and the weights 13 .
  • the structure in which the weights 13 are moved upwards by using the support board 1 , the backrest 3 , the seat 4 , and the pedal 5 , the rod 11 , the pulley 15 , the handle 17 , and the like corresponds to the load generating unit in the claims.
  • the load generating unit should be configured so as to move the weights, but the structure is not limited to the above-described structure.
  • the measuring device 150 has a data processing unit 200 comprised of a position sensor 20 , a load sensor 30 , a reflector plate 40 , a stopper 50 , a monitor 60 , and a computer, for example.
  • the measuring device 150 can be attached as follows when applied to the above-described training device 100 .
  • the load sensor 30 is attached to the wire 9 to detect the load applied to the wire 9 .
  • the reflector plate 40 such as a reflection sheet which reflects light, is affixed to the upper surface of the uppermost weight 13 .
  • the position sensor 20 is fixed to the frame 7 to emit light toward the reflector plate 40 on the weights 13 . Then, the position sensor 20 detects the position of the weights 13 by receiving the light reflected from the reflector plate 40 .
  • the stopper 50 is provided in order to prevent the weights 13 from moving beyond a predetermined position and from damaging the frame 7 , for example.
  • the position sensor 20 , the load sensor 30 , and the monitor 60 are configured to be detachable from the training device. Therefore, the present measuring device has excellent versatility in that it can be attached to an existing training device, and a measurement function can be added afterwards.
  • the structures and functions of the position sensor 20 , the load sensor 30 , and the monitor 60 will be explained below more specifically.
  • FIG. 4 is an explanatory diagram of the position sensor.
  • the position sensor 20 has a light emitting element 21 such as LED, a projection lens 23 , a receiving light lens 25 , a light receiving element 27 , and a light shielding plate 29 .
  • the position sensor 20 is arranged to face the reflector plate 40 that is affixed on the uppermost weight 13 .
  • Light is emitted from the light emitting element 21 toward the reflector plate 40 .
  • the projection lens 23 can improve directivity of the light which is emitted from the light emitting element 21 .
  • the receiving lens 25 focuses the light onto the light receiving element 27 which has been reflected by the reflector plate 40 and entered the receiving lens 25 .
  • the light shielding plate 29 prevents the light from the light emitting element 21 from entering the light receiving element 27 .
  • the position of the light spot on the light receiving element 27 will vary depending on the distance between the position sensor 20 and the reflector plate 40 .
  • the spot distance of the reflected light which is reflected by the reflector plate 40 is B 1 .
  • the spot distance of the reflected light is B 2 .
  • the distance A between the position sensor 20 and the reflected plate 40 on the weights 13 can be calculated by using the spot distance B of the reflected light and the following formula (2) based on, for example, the principal of triangulation.
  • A ( C ⁇ f )/ B (2)
  • C distance between the center of the projection lens and the center of the light receiving lens
  • f focal distance of the light receiving lens
  • the position of the weights 13 can be detected by using the position sensor 20 .
  • the position sensor 20 has an attachment structure which is attached to a frame support portion 71 with a screw holding portion 20 a.
  • FIG. 5A is an enlarged perspective view of the load sensor
  • FIG. 5B is an enlarged perspective view of the load sensor as seen from the opposite side of FIG. 5A
  • FIG. 6A is a cross-sectional view of the load sensor before a load is applied to the wire
  • FIG. 6B is a cross-sectional view of the load sensor after a load is applied to the wire.
  • the load sensor 30 has a distortion receiving portion 31 , a wire fixing portion 33 , screw portions 35 a and 35 b , wire supporting portions 37 a to 37 c , and a distortion measuring portion 39 .
  • the distortion measuring portion 39 is provided on one principal surface of the distortion receiving portion 31 .
  • the distortion measuring portion 39 can adopt a known distortion gauge.
  • the wire supporting portions 37 a and 37 b are provided at the other principal surface of the distortion receiving portion 31 , and are fixed to both ends of the distortion receiving portion 31 respectively.
  • the wire supporting portion 37 b is fixed to the wire fixing portion 33 .
  • the distortion receiving portion 31 and the wire fixing portion 33 are fixed with the screw portions 35 a and 35 b so that the wire 9 can be held by the wire supporting portions 37 a to 37 c .
  • the wire supporting portion 37 b is screwed so as to be located closer to the wire supporting portion 37 c , between the wire supporting portions 37 a and 37 c .
  • the distortion measuring portion 39 is located between the wire supporting portion 37 b and the wire supporting portion 37 a .
  • the distortion receiving portion 31 , the wire fixing portion 33 , and the wire supporting portions 37 a to 37 c are formed to have a predetermined width so that a wide belt or the like as well as a wire can be fixed.
  • FIGS. 6A and 6B a method for measuring a load with the load sensor 30 will be explained using FIGS. 6A and 6B .
  • a load is not applied to the pedal 5 , and a load is not applied from the weights 13 to the wire 9 and the pedal 5 . Therefore, a tension T from the weights 13 is not applied to the wire 9 , and as shown in FIG. 6A , the distortion receiving portion 31 is not distorted.
  • the weights 13 move upwards and downwards repeatedly, and the load from the weights 13 is applied to the wire 9 .
  • the load applied by the weights 13 exerts a tension T on the wire 9 , and the wire 9 is pulled in the direction of the tension T.
  • the distortion receiving portion 31 is distorted because the distortion receiving portion 31 receives a stress ⁇ caused by the interaction among the wire supporting portions 37 a to 37 c which hold the wire 9 .
  • the distortion of the distortion receiving portion 31 makes the distortion measuring portion 39 extend and contract, and changes a resistance value R of the distortion measuring portion 39 .
  • the change of the resistance value R is detected by measuring an output voltage e of the distortion measuring portion, and the stress ⁇ is calculated.
  • the stress ⁇ which the distortion measuring portion 39 receives is calculated based on, for example, the following formulas (3) and (4).
  • ⁇ R/R K ⁇ ( ⁇ / E ) (3)
  • e ( 1 ⁇ 4) ⁇ ( ⁇ R/R ) ⁇ E (4)
  • R original resistance value R of the distortion measuring portion 39
  • ⁇ R amount of change of the resistance value R caused by the extension and contraction of the distortion measuring portion 39
  • K gauge factor
  • E Young's modulus
  • e output voltage of the distortion measuring portion 39 .
  • the stress ⁇ which the distortion measuring portion 39 receives is calculated, and the load which is applied to the pedal 5 is calculated based on the relationship between this previously calculated stress ⁇ and the load.
  • ⁇ an angle formed by the stress ⁇ and the distortion receiving portion 31
  • the load is equal to coefficient multiplied by a tension T.
  • the load which is applied to the pedal 5 is calculated.
  • the load which is applied to the pedal 5 may be calculated based on a relationship between a tension T and a load F by attaching a tension sensor instead of the load sensor 30 to the wire 9 .
  • the load sensor 30 is configured to be attachable and detachable, and configured to hold the wire in place by the distort receiving portion 31 and the wire fixing portion 33 , which are fixed with the screw portions 35 a and 35 b.
  • FIG. 7 is a view showing the appearance of monitor 60 .
  • the monitor 60 has a display 61 , an input portion 63 , a transponder receiving portion 65 , an authentication lamp 67 , and the like.
  • the display 61 of the monitor 60 displays to a trainee, for example, the position of the weights detected by the position sensor 20 , the load detected by the load sensor 30 , the number of movements of the pedal 5 , the mass of the weights 13 , quantity of exercise, and the like.
  • the input portion 63 accepts an input, such as a selection from an exercise menu.
  • the transponder receiving portion 65 accepts an input such as a personal ID.
  • the authentication lamp 67 lights up a lamp when it has identified a trainee. Furthermore, a speaker may be built into the monitor 60 in order to notify a trainee of his/her exercise state by voice.
  • the monitor 60 is attached to the frame 7 by means of the screw fixing portion 60 a , and is configured to be freely attachable and detachable.
  • the position sensor 20 and the load sensor 30 as well as the monitor 60 are configured to be freely attachable and detachable, a measurement function and a load measuring function can be added easily to an existing training device, by attaching these portions thereto and by affixing the reflector plate 40 on the uppermost weight 13 . Therefore, this provides a cost advantage for a fitness center and the like, because the function of an existing device can be improved and the existing device can continue to be used, without having to purchase a new training device with a measuring function.
  • the data processing unit 200 has a mass calculation unit 210 , a position monitoring unit 220 , a load monitoring unit 230 , a mass storing unit 240 , a display control unit 250 , and a communication control unit 260 .
  • the position monitoring unit 220 monitors the changes in the position of the weights 13 .
  • the load monitoring unit 230 monitors the load which is applied to the pedal 5 .
  • the mass calculation unit 210 calculates the mass of the weights 13 based on the position of the weights 13 obtained from the position monitoring unit 220 and the load applied to the pedal 5 obtained from the load monitoring unit 230 .
  • the mass storing unit 240 stores the mass of the weights 13 that are used in the training device 100 .
  • the display control unit 250 displays the exercise state which is obtained from the position monitoring unit 220 , the load monitoring unit 230 , and the mass calculating unit 210 , and personal data which is obtained from the server 300 via a communication control unit 260 , and the like.
  • the communication control unit 260 controls communication between the server 300 and the data processing unit 200 . The structure of each unit will be explained in more detail below.
  • the position monitoring unit 220 monitors the changes in the position of the weights 13 , which changes depending on the movements of the pedal 5 of the training device 100 that a trainee moves.
  • the change state of the position of the weights means that the weights are moving or have stopped. More specifically, it means that there has been a change in the distance moved from an initial state, the speed of movement, the acceleration, and the like.
  • the position monitoring unit 220 obtains the position of the weights 13 which is output by the position sensor 20 , and monitors the changes in the position of the weights 13 .
  • FIG. 8 is an explanatory diagram showing that the weights 13 are moving in the direction of the arrows shown in FIG. 8 from the lowest portion to the uppermost portion.
  • Table 1 shows an example of the change in the position of the weights 13 , which the position monitoring unit 220 obtains at every interval time ⁇ t 3 when the weights 13 are moving as shown in FIG. 8 .
  • Times t 1 to t 7 are divided by a predetermined interval time ⁇ t 3 .
  • the position monitoring unit 220 obtains a distance L between the reflector plate 40 pasted on the weights 13 and the position sensor 20 at a predetermined interval time ⁇ t 3 .
  • Table 2 shows a movement distance ⁇ L, movement speed V, and acceleration ⁇ of the weights 13 which the position monitoring unit 220 calculates based on the obtained distance L.
  • the position monitoring unit 220 may calculate the movement speed V and the acceleration ⁇ of the weights 13 .
  • the position monitoring unit 220 can detect that the weights 13 are in the stopped state based on the movement speed V and the acceleration ⁇ .
  • the position monitoring unit 220 stores the changes in the position of the weights 13 , such as the distance L, the movement distance ⁇ L, the movement speed V, and the acceleration ⁇ .
  • the state in which the weights 13 are stopped includes the state in which the weights 13 are almost stopped as well as the state in which the weights 13 are completely stopped.
  • the position monitoring unit 220 detects that the weights 13 are stopped based on whether the movement distance ⁇ L is below a predetermined value. Likewise, the position monitoring unit 220 may detect that the weights 13 are stopped based on whether the movement speed V or the acceleration ⁇ of the weights 13 stays below a predetermined value.(B) Monitoring the movement of the weights (t 2 ⁇ t ⁇ t 6 )
  • the weights 13 are moving upwards in the direction of the arrows shown in FIG. 8 under tension from the wire 9 , because a trainee is applying a load to the pedal 5 and moving the pedal 5 . Therefore, as shown in Table 1, a distance L which the position monitoring unit 220 obtains from the position sensor 20 differs from time to time at t 2 ⁇ t ⁇ t 6 . Then, the position monitoring unit 220 calculates each movement distance ⁇ L based on the obtained distance L as shown in Table 2. The position monitoring unit 220 detects that the weights 13 are moving because the movement distance is ⁇ L ⁇ 0. In addition, as shown in Table 2, the movement speed V and the acceleration ⁇ may be calculated as described above. The position monitoring unit 220 detects that the position of the weights 13 is changing because the movement speed is V ⁇ 0 or the acceleration is ⁇ 0. Then, the position monitoring unit 220 stores the changes in the position of the weights 13 .
  • the position monitoring unit 220 counts the number of movements of the weights 13 based on the position of the weights 13 , which is obtained from the position sensor 20 .
  • the number of movements of the weights 13 is counted based on, for example, the movement of the weights upwards and downwards repeatedly over a predetermined amplitude.
  • the following requirements must be met so that a plurality of movements may be counted.
  • the position of the weights 13 which go up from MIN must move upwards beyond a line A, which is a predetermined bottom end line, and further move upwards beyond an upper end line B, which is set to have a predetermined distance from the line A.
  • the first count is counted when the position of the weights 13 goes over the line B.
  • the position of the weights 13 which has once moved beyond the line B must go down below the line A.
  • the load monitoring unit 230 obtains information on the load applied to the pedal 5 , which is measured by the load sensor 30 at every interval time ⁇ t 3 , and monitors the load.
  • the time when the load monitoring unit 230 obtains information on the load is coincident with the time when the position monitoring unit 220 obtains the position of the weights 13 .
  • F load applied to the pedal 5
  • m mass of the weights 13 connected to the pedal 5
  • ⁇ acceleration of the pedal 5 , i.e., the acceleration of the weights 13
  • g gravity acceleration.
  • the load includes a dynamic load Fa and a static load Fs.
  • the static load Fs is a load which is applied to the pedal 5 when the pedal 5 is stopped, or when the pedal 5 is moving at a constant speed (an acceleration ⁇ of the pedal 5 ⁇ 0).
  • the static load Fs is represented as F ⁇ mg because acceleration ⁇ 0.
  • the load monitoring unit 230 obtains and stores the load measured by the load sensor 30 over time, and stores this information.
  • the load monitoring unit 230 obtains the static load Fs at t 1 ⁇ t ⁇ t 2 and t 6 ⁇ t ⁇ t 7 because the position of the weights 13 is not changed.
  • the load monitoring unit 230 obtains the dynamic load Fa (Fa 2 , Fa 3 , Fa 4 , and Fa 5 ) at t 2 ⁇ t ⁇ t 6 because the position of the weights 13 is changing and the acceleration ⁇ is not equal to 0 (acceleration ⁇ 0).
  • a change in the dynamic load Fa when acceleration ⁇ is being added may be reported as a visual image to a trainee by using an acceleration state display bar P in the display 61 of the monitor 60 in FIG. 11 as described below.
  • the load monitoring unit 230 can use the average value of the load at a predetermined interval time ⁇ t 2 ( ⁇ t 2 ⁇ t 3 ) instead of the value of the load which is obtained at every predetermined interval time ⁇ t 3 . This is because the effect of noise on the value of the load which is obtained at every predetermined interval time ⁇ t 3 may be reduced.
  • FIGS. 10A and 10B are explanatory diagrams showing that the average value of the load at a predetermined interval time ⁇ t 2 can be regarded as the value of the load at every predetermined interval time ⁇ t 3 .
  • FIG. 10C shows a method for calculating an average value of the load at a predetermined interval time ⁇ t 2 .
  • the average value of the loads at a predetermined interval time ⁇ t 2 can be calculated as the average value of a load obtained at every predetermined interval time ⁇ t 1 (2 ⁇ t 1 ⁇ t 2 ).
  • the predetermined interval time ⁇ t 2 may be set so that each predetermined interval time ⁇ t 3 is included within the predetermined interval time ⁇ t 2 (see time ta in FIG. 10A ), or alternatively, the predetermined interval time ⁇ t 2 may be set prior to each predetermined interval time ⁇ t 3 (see time tb in FIG. 10B ).
  • the above-described predetermined interval time ⁇ t 1 is a very short period of time, for example, one-sixtieth of a second
  • the predetermined interval time ⁇ t 2 is, for example, sixteen-sixtieth of a second.
  • the load averaging is effective in, for example, the following situation.
  • the position of the weights 13 will almost stop when the weights 13 are located at the uppermost position or at the lowest position in their range of motion.
  • the acceleration of the weights 13 will change, and the load on the pedal 5 will change.
  • the mass calculating unit 210 calculates the mass m of the weights 13 based on the change in the position of the weights 13 obtained from the position monitoring unit 220 and the load applied to the pedal 5 obtained from the load monitoring unit 230 .
  • the mass m of the weights 13 can be calculated based on either the static load Fs or the dynamic load Fa. This will be explained using FIG. 8 , Table 1, and Table 2.
  • m ⁇ Fa/g is calculated as the mass m of the weights 13 as shown in Table 4.
  • Table 4 Time t Mass m t1 ⁇ t ⁇ t2 Fs/g t2 ⁇ t ⁇ t3 Fa2/(Va/ ⁇ t3 + g) t3 ⁇ t ⁇ t4 Fa3/(Vb/ ⁇ t3 + g) t4 ⁇ t ⁇ t5 Fa4/(Vc/ ⁇ t3 + g) t5 ⁇ t ⁇ t6 Fa5/(Vd/ ⁇ t3 + g) t6 ⁇ t ⁇ t7 Fs/g
  • the mass calculating unit 210 may calculate the mass m of the weights 13 according to the above formula (1) based on the acceleration of the weights 13 being ⁇ 0. which is calculated by the position monitoring unit 220 .
  • the mass calculating unit 210 obtains the acceleration ⁇ (acceleration ⁇ 0) of the weights 13 from the position monitoring unit 220 at t 2 ⁇ t ⁇ t 6 .
  • the mass m of the weights 13 is calculated according to the above formula (1) as shown in Table 4.
  • the mass of the weights 13 may be calculated based on the dynamic load Fa as described above. However, the actual mass of the weights 13 can be calculated more accurately by calculating the mass of the weights 13 when the position monitoring unit 220 detects that the weights 13 are at rest.
  • the load along with the acceleration of the movement will be added to the mass of the weights.
  • accurate measurement of the mass is realized by coupling each function of the position monitoring unit 220 , the load monitoring unit 230 , and the mass calculating unit.
  • the mass storing unit 240 is provided in order to adjust a load calculated based on a detected voltage by the load sensor 30 to an accurate mass of the weights 13 . More specifically, the calculated load differs slightly from the actual mass of the weights because of noise, rounding off the value the load, and the like. If the calculated load is output to the monitor 60 without any changes, it is difficult for a trainee to look at and understand the output data. Furthermore, although a trainee works out with the same load, different data will be displayed for each training session, which results in an unclear standard for the trainee. Therefore, the calculated load is adjusted to actual mass of the weights 13 , by comparing the calculated load with a mass which is stored in the mass storing unit 240 .
  • the mass storing unit 240 stores the substantial mass of the weights 13 that are used in the training device 100 . More specifically, if the mass of a single weight for the relevant training device is 2 Kg, two weights are 4 Kg, and three weights are 6 Kg. Therefore, the mass data is stored as 2 Kg, 4 Kg, 6 Kg, . . . in a table. If the mass of a weight is 5 Kg, the mass data is stored as 5 Kg, 10 Kg, 15 Kg, . . . in a table. Then, the mass calculating unit 210 compares the calculated mass of the weights with the mass data. The closest value to the calculated mass of the weights is extracted. For example, if the mass of a weight is 2 Kg, and the calculated data is 4.2 Kg, then the data 4 Kg stored in the mass storing unit 240 will be extracted. Therefore, an accurate mass of the weights which are being used can be calculated.
  • the mass of a single weight is set by inputting it on an input screen which can be displayed on the display 61 of the monitor 60 .
  • the communication control unit 260 transmits the exercise status of the trainee obtained from the position monitoring unit 220 , the load monitoring unit 230 , and the mass calculating unit 210 to the server 300 .
  • the communication control unit 260 receives from the server 300 personal data which has been stored in the server 300 .
  • the personal data includes body height, body weight, the previous exercise status of the trainee, and the like.
  • the display control unit 250 outputs the exercise status of a trainee such as the movement distance ⁇ L, and the number of movements of the weights 13 obtained from the position monitoring unit 220 , the load applied to the pedal obtained from the load monitoring unit 230 , and the mass of the weights 13 which is obtained from the mass calculation unit 210 , to the monitor 60 .
  • the display control unit 250 outputs personal data received from the server 300 to the monitor 60 .
  • the display 61 of the monitor 60 displays the exercise status obtained from the display control unit 250 as shown in FIG. 11 to FIG. 13 . In FIG. 11 , the mass of the weights 13 , the number of movements of the weights 13 , and the target number of movements are displayed. In FIG.
  • P is an acceleration state display bar which shows the acceleration with which a trainee lifts the weights 13 .
  • the number of white rectangular portions displayed on the bar P correspond to the mass of the weights 13 to be lifted. For example, as shown in FIG. 11 , several white rectangles will be displayed, and correspond to 30 kg.
  • the white rectangles in the bar P will not move to the right beyond their original position (e.g., beyond the position shown in FIG. 11 ).
  • the while rectangles in the bar P will extend beyond their original position (rightward in FIG. 11 ), and proceed to a new position corresponding to the acceleration of the weights 13 .
  • the acceleration state display bar P can extend beyond the area of the original mass of the weights 13 in accordance with not only the mass of the weights, but also the training state of a trainee, and thus can arouse a trainee's interest.
  • FIG. 12 the previous number of movements, the best number of movements, and the like are displayed.
  • FIG. 13 shows the present position of the weights 13 , and the range in which the number of movements of the weights 13 is counted, as displayed on the monitor 60 .
  • the number of movements is counted when the weights 13 exceed the shaded area which is shown in FIG. 13 . Therefore, a trainee can understand the position of the weights 13 , and move the pedal 5 so that the number of the movements can be counted.
  • FIG. 14 is a flow chart showing the flow when calculating the mass and the number of movements of weights 13 .
  • a trainee will place an authentication card such as an IC card and the like on the receiving portion 65 of the monitor 60 so that the measuring device 150 can identify the ID of the trainee. Then, the following process will begin when the trainee moves the pedal 5 with his/her legs.
  • Step S 10 The position monitoring unit 220 and the load monitoring unit 230 determine whether or not a predetermined time interval ⁇ t 1 has elapsed. ⁇
  • Step S 20 The position monitoring unit 220 and the load monitoring unit 230 obtain the position of the weights 13 and the load F applied to the pedal 5 from the position sensor 20 and the load sensor 30 when the predetermined time interval ⁇ t 1 has elapsed.
  • the position of the weights is represented by a distance L, which is the distance from the position sensor 20 to the weights 13 .
  • Step S 30 The position monitoring unit 220 and the load monitoring unit 230 stores the obtained position of the weights 13 and the obtained load applied to the pedal 5 .
  • Step S 40 The load monitoring unit 230 determines whether or not a predetermined time interval ⁇ t 2 has elapsed. If the predetermined time interval ⁇ t 2 has not elapsed, the process returns to Step S 10 .
  • Step S 50 After the predetermined time interval ⁇ t 2 has elapsed, the load monitoring unit 230 averages the loads which have been stored for each predetermined time interval ⁇ t 1 , within the predetermined time interval ⁇ t 2 , and reduces the effect of noise.
  • Step S 60 The position monitoring unit 220 and the load monitoring unit 230 determine whether or not a predetermined time interval ⁇ t 3 has elapsed.
  • Step S 70 When the predetermined time interval ⁇ t 3 has elapsed, the position monitoring unit 220 calculates and stores the movement distance ⁇ L, the movement speed V, and the acceleration ⁇ .
  • Step S 80 The position monitoring unit 220 determines whether or not the display control unit 250 has output the mass m of the weighs 13 to the monitor 60 . In other words, the position monitoring unit 220 determines whether or not the mass m of the weights 13 has been already displayed on the display 61 of the monitor 60 .
  • Step S 90 The mass calculating unit 210 calculates the mass m of the weights 13 based on the acceleration ⁇ of the weight 13 that is calculated by the position monitoring unit 220 and the load applied to the pedal 5 .
  • Step S 100 The display control unit 250 obtains the mass m which has been calculated by the mass calculating unit 210 and outputs it to the monitor 60 so as to display it on the display 61 .
  • Step S 110 In contrast, when the mass m of the weights 13 has already been displayed, the load monitoring unit 230 outputs the load F applied to the pedal 5 to the display control unit 250 .
  • the display control unit 250 displays the load F on the display 61 .
  • Step S 120 Furthermore, when the mass m of the weights 13 has already been displayed, the position monitoring unit 220 calculates the movement distance ⁇ L of the weights.
  • Step S 130 The position monitoring unit 220 determines whether or not the calculated movement distance ⁇ L is a predetermined value or greater.
  • Step S 140 When the movement distance ⁇ L is equal to or greater than a predetermined value, the number of movements of the weights 13 is incremented.
  • Step S 150 The position monitoring unit 220 outputs the number of movements of the weights 13 to the display control unit 250 .
  • the display control unit 250 outputs the latest number of movements to the display 61 .
  • the updated number of movements is displayed. If the movement distance ⁇ L is equal to or less than a predetermined value, and the number of movements is not incremented, the current number of movements will be displayed as it is.
  • Step S 160 The position monitoring unit 220 and the load monitoring unit 230 will determine whether or not an end instruction has been received from a trainee. If the exercise has not ended, the position monitoring unit 220 and the load monitoring unit 230 will continue obtaining the position of the weight and the load applied to the pedal 5 .
  • the measuring device can calculate the mass of the weights 13 when stopped as well as detect the load applied to the wire 9 , and can display the data on the monitor 60 . Therefore, when the weights 13 are moving, the load corresponding to the weights 13 being lifted by the trainee is displayed. For example, the more the weights are moved vigorously, the larger the displayed value of the load will become. Consequently, this gives a trainee incentive to work out. In addition, when the weights 13 are stopped, the mass of the weights 13 is displayed.
  • the measuring device provides excellent operability in that a trainee can easily check the mass of the weight(s) which is being used at present, by just looking at the display while maintaining his/her training position, and the trainee does not have to look at the weights 13 as with a conventional weight training machine. Further, the measuring device according to the present invention can be attached to an existing training device that does not have a measuring portion as described above, and thus provides a cost advantage for a fitness center and the like.
  • Programs for carrying out the above-described methods on computers and computer readable recording media on which such a program is recorded are included within the scope of the present invention.
  • the programs may include a downloadable program.
  • the recording media may include computer readable/writable discs, hard discs, semiconductor memories, CD-ROMs, DVDs, magneto-optical discs (MO), and the like.
  • the term “configured” as used herein to describe a component, section or part of a device includes hardware and/or software that is constructed and/or programmed to carry out the desired function.
  • the term “comprising” and its derivatives, as used herein are intended to be open ended terms that specify the presence of the stated features, elements, components, groups, integers, and/or steps, but do not exclude the presence of other unstated features, elements, components, groups, integers and/or steps.
  • the foregoing also applies to words having similar meanings such as the terms, “including”, “having” and their derivatives.
  • the terms “part,” “section,” “portion,” “member” or “element” when used in the singular can have the dual meaning of a single part or a plurality of parts.
  • terms of degree such as “substantially”, “about” and “approximately” as used herein mean a reasonable amount of deviation of the modified term such that the end result is not significantly changed. For example, these terms can be construed as including a deviation of at least ⁇ 5% of the modified term if this deviation would not negate the meaning of the word it modifies.

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  • Orthopedic Medicine & Surgery (AREA)
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  • General Physics & Mathematics (AREA)
  • Rehabilitation Tools (AREA)
  • Force Measurement Appropriate To Specific Purposes (AREA)
  • Length Measuring Devices By Optical Means (AREA)
  • Length Measuring Devices With Unspecified Measuring Means (AREA)
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TWI246430B (en) 2006-01-01

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