Label: Completely Gone Recordings - CGR-216 • Format: 4x, File MP3, EP, Stereo 320 kbps • Country: US • Genre: Electronic • Style: Breakbeat, Drum n Bass, Electro, IDM
Effective date : Year of fee payment : 4. Year of fee Displacement - M▲R▲5* - Signals With Shoes : 8. A stride monitoring device that can be used particularly for sports applications and that includes a pair of shoes, Displacement - M▲R▲5* - Signals With Shoes of which includes at least one magnetic mass, and the other includes at least a measurement device to make at least one measurement, and a processor for processing of the measurement.
The measurement device includes at least one accelerometer and at least one magnetometer capable of outputting signals that can be processed to determine stride parameters.
It can be used particularly in sports and medicine applications. Devices are known that are installed in pairs of shoes and are designed to monitor some parameters. A device of this type can include a magnetic mass placed in one of the shoes, and a measurement means placed in the other shoe. The following documents in particular contain further information:. Document  describes an electronic device for measurement of the movement of a foot in a shoe, for example by means of Hall effect Sam Dees - After All and magnets fixed to the sole of this shoe.
Document  describes a device designed to warn a child when he puts a shoe on the wrong foot, by means of a magnet placed in one of the shoes and electrical and magnetic means placed in the other shoe. It Is What It Is - Thug Drama - Presents Streetforce should be noted that these documents do not describe the use of an accelerometer or a magnetometer.
The purpose of this invention is to solve the problem of obtaining information about the stride of a walker or a runner. It is intended to measure parameters characteristic of the stride and possibly other parameters complementary to the previous parameters particularly foot movementsusing appropriate means contained in the shoes of the person Displacement - M▲R▲5* - Signals With Shoes stride is being monitored.
The invention proposes to use at least one magnetometer to make measurements of the magnetic field and at least one accelerometer to make acceleration measurements during displacement of the device so as to calculate the position of this device in space. Specifically, the purpose of this invention is a stride monitoring device, this device comprising a pair of shoes comprising first and second Carinhoso - Various - Choro Chorado, the first shoe comprising at least a magnetic mass, the second shoe comprising at least measurement means to make at least one physical measurement, and electronic means for processing of this physical measurement, this device being characterised in that the measurement means comprise at least one accelerometer and at Come Back To Sorrento - Dean Martin - The Very Best Of Dean Martin one magnetometer capable of outputting signals that can be processed to determine stride parameters.
It should be noted that the insertion of the components of the device in the pair of shoes makes it possible not to hinder the person who is wearing these shoes and results in a discrete device. According to one preferred embodiment of the device according to the invention, each of the first and second shoes comprises at least one magnetic mass, measurement means for making at least one physical measurement, and electronic means for processing this physical measurement, the measurement means comprising at least one accelerometer and at least one magnetometer capable of outputting signals that can be processed to determine the stride parameters.
Preferably, the magnetic mass comprises at least one permanent magnet. The measurement means can comprise a plurality of accelerometers. Similarly, the measurement means can include a plurality of magnetometers. Preferably, the electronic processing means are provided with means of transmitting a signal output by these electronic processing means. According to one particular embodiment of the device according to the invention, this device also comprises portable means designed to receive the signal transmitted by the transmission means and to display data representative of this signal.
According to one preferred embodiment of the invention, the memory contains:. Preferably, the calibration sequence is designed firstly to determine a mathematical calibration law by means of a polynomial regression, and secondly to determine a direct correspondence between the measured signal and the stride length, for given shoes and a given individual.
Preferably, the stride length estimating algorithm uses the measurement of the variation in the magnetic field resulting from the movement of the magnetic mass.
This invention will be better understood after reading the description of example embodiments given below, purely for guidance and in no way limitative, with reference to the attached drawings in which:. The following describes examples of the device according to the invention, in which the fact that at all times in a stride, one foot has a support point fixed with respect to the ground while the other foot is moving, at a variable distance from the foot with a support point fixed with respect to the ground, and this distance is measured to calculate the distance travelled by integration.
These examples involve the combined association and processing of signals from one or several magnetometers preferably one or several micro-magnetometers and one or several accelerometers contained in one of the shoes in a pair of shoes, and a magnetic mass contained in the other shoe in the pair, to measure mainly distances and speeds. Thus, at least one magnetometer is used, and preferably a micro-magnetometer to measure the magnetic field produced by a moving magnetic mass, to make a dynamic measurement of the distance between the shoes using the measurement of the response of the signal from the magnetometer.
This measurement uses the signal shape and the amplitude of the alternating magnetic field that is measured at the rate of the stride. This dynamic measurement is calibrated in time using the signal output by the accelerometer, particularly at the time of the impact of the foot on the ground and the calibration makes it possible to determine the instants at which the signal from the micro-magnetometer has to be processed.
This measurement can be Jessies Theme (Emergente En Los Veranos) - The Congosound - Jessies Theme or refined by joint integration of the acceleration measured by the accelerometer, the measured speed of the mobile magnetic mass and then the measured distance between the shoes.
This measurement will be calibrated by a calibration phase to establish the law defining the stride length as a function of the signal amplitude and as a function of the walker or runner and magnetic characteristics of the shoe containing the magnetic mass. In the given examples, the shoes are provided Work - CPI - Chinchillin completely standalone and portable means.
The measured parameters are preferably transmitted by radio to personal display and monitoring means that can be installed on a bracelet or on any other portable element.
A device conforming with the invention can be made in order to measure various parameters, and particularly the number of steps, the length of each step, the distance travelled, the walking or running time, the average speed of the walker or the runner, his maximum speed and his rest time. This device can be programmed to define a typical hike, particularly by the duration, speed, rhythm and rest time, and to measure differences between effective values and planned values so that the user can perform a defined program.
All parameters are transmitted to Displacement - M▲R▲5* - Signals With Shoes display means that can be fixed to a belt or a bracelet. Dh t where:. Dm: value calculated as a function of the distance travelled Displacement - M▲R▲5* - Signals With Shoes going uphill, with correlation of information provided by the altimeter.
Dd: value calculated as a function of the distance travelled when going downhill, with correlation of information provided by the altimeter. Dh: value calculated as a function of the distance travelled in a horizontal phase, with correlation of information provided by the altimeter. K: global coefficient, taking account of the units, nature and the difficulty of the ground. For high level sports applications or medical applications, a high sensitivity device according to the invention can be made using several accelerometers, several micro magnetometers and processing algorithms designed to make precise calculations of foot movements in space and different foot orientations, within a determined time phase.
A Displacement - M▲R▲5* - Signals With Shoes according to the invention is installed in a pair of shoes. One of the shoes may be simply provided with a magnetic mass consisting of a magnet, preferably a permanent magnet. The other shoe can simply include at least Displacement - M▲R▲5* - Signals With Shoes accelerometer, at least one magnetometer, electronic means for processing signals output by the latter and an electric energy source to supply power to the accelerometer, the magnetometer and the electronic processing means.
The device may also comprise display, monitoring and control means that can Displacement - M▲R▲5* - Signals With Shoes be placed on a bracelet or a belt, although this is not indispensable. However, the two shoes preferably contain the same equipment, for reasons of industrial manufacturing, manufactured quantities, symmetry and homogeneity. This is diagrammatically shown by the example in FIGS. It should be noted that these shoes are in the earth's magnetic field Bt.
For example, the various components of the device could be installed in the soles of shoes C 1 and C 2. In the example considered, the person wearing the shoes thus equipped also has a monitoring and control bracelet or belt BCC as shown in FIG. SEQCAL is a calibration sequence of the signal output by accelerometers and magnetometers, as a function of the stride length and intrinsic parameters of the shoe.
SEQCAL calculates the mathematical calibration law using a polynomial regression or any other Pilaus-Biisi - Gasellit - Gasellit algorithm, and sets up a direct correspondence between the measurement signal and the stride length for a given shoe and a given individual.
This correspondence depends on the internal magnetic mass, its distribution in the Displacement - M▲R▲5* - Signals With Shoes there is only one magnet per shoe in the example considered, Displacement - M▲R▲5* - Signals With Shoes in another example there could be severaland the orientation of the magnetic dipole s of Displacement - M▲R▲5* - Signals With Shoes magnetic mass.
The signal varies depending on the instantaneous distance between the micro-magnetometer and the shoe, the direction of magnetisation and the distribution of the magnetic mass in the shoe. The UTD unit calculates the stride length as a Displacement - M▲R▲5* - Signals With Shoes of the signal shape, its amplitude, the instant given by the accelerometer s for taking the magnetic signal of the stride into account, and the parameters in the law that are determined during the calibration phase.
The relations and algorithm given below are then used. The complete magnetic signature of the passage of one foot in front of the other depends on the minimum distance between the two feet and the speed V of the foot in the stride. Here, There And Everywhere - The Beatles - Revolver a correct estimate of the speed V can be obtained using a known quadratic differences minimisation process and an adapted filtering.
Under these conditions, using the speed estimate made when the signal quality is good, it is easy to calculate the distance travelled in this area by multiplying the estimated speed by the path time corresponding to this area, for which the end is determined by when the accelerometer is tripped.
Furthermore, the quality of the measurement signal output by the micro-magnetometers contained in the shoes can be improved by correcting this measurement taking account of the value of the earth's magnetic field Bt.
This is done by subtracting the measured value of Bt made by the micro-magnetometer fixed to the bracelet or to the belt from this measurement, this magnetometer not being sensitive to the magnets in the shoes. NORPARAM is an algorithm to calibrate signals as a function of parameters input by the user onto the keypad on the bracelet or the belt. This algorithm takes account of the derivative of the signal output by the magnetometer in one shoe following a variation in the magnetic field generated by the magnet in the other Displacement - M▲R▲5* - Signals With Shoes.
The bracelet or belt may also be provided with:. Other algorithms may also be provided to calculate other parameters such as the distance travelled, the average speed, the maximum instantaneous speed, the total energy spent by the runner or the walker, the instantaneous energy integrated in different phases, the power output, the state of deviations from the run or the walk as a function of a previously defined program.
We will discuss such a processing at the end of this description. If the magnetic mass that has to be placed in a shoe is too large, an electromagnet can be used to produce the magnetic field instead of a permanent magnet. Preferably, this electromagnet is placed in the sole of the shoe. The energy to the electromagnet may be produced by a generator during each stride during the run or the walk, either at the time of the impact on the ground, or when the sole is folding.
Displacement - M▲R▲5* - Signals With Shoes battery is then used only to supply power to the remainder of the electronic means. The parameter x represents the distance travelled. At time t 0the shoe C 2 left foot is stopped and the shoe C 1 right foot begins its stride movement that terminates at time t 1.
Under these conditions, for signals received by C 1 :. ACC 1 saves the acceleration then the deceleration of stride 1and. MAG 1 measures a signal s 1 Displacement - M▲R▲5* - Signals With Shoes is the sum of:. ACC 2 does not measure any acceleration, since C 2 is stopped, and the speed is zero. MAG 2 measures a signal s 2 that is the sum of:.
At time t 1 the stride 1 is terminated, C 1 is stopped and C 2 begins and then stops at time t 2. Operation is exactly the same but symmetric: signals with index 1 are replaced by signals with index 2 and vice versa.
Refer to FIG. These measurements are used in module ET 1 ET 2 of shoe C 1 C 2 using an interface not shown and are firstly stored in a memory with a FIFO first in first out type management, and secondly transmitted directly to the interface MTR 1 MTR 2 that transmits them in encoded form, through a multi-channel digital radio transmission process.
For example, data for shoe 1 will be transmitted on MTR 1 channel 1and data for shoe 2 will be transmitted on MTR 2 channel 2. Displacement - M▲R▲5* - Signals With Shoes sensors are sampled at Fiedel Michel - Fiedel Michel No. 2 typical frequency of Hz, that is adaptable.
A time indicator is inserted at the beginning of each list, so as to be able to mark each value of the corresponding encoders in time. The number of numeric values of sensors between two time indicators of the lists recorded in memory depends on the selected sampling frequency. For example, this number is equal to if this frequency is equal to Hz.
The storage capacity of unit UTD is such that at least all values of the sensors multiplied by the sampling frequency, multiplied by the maximum walking or running time to be recorded for example 24 hours can be stored. The unit UTD continuously calculates parameters of the walk or the run, and to do so it triggers various calculation algorithms saved in its program memory.
The resulting data are displayed cyclically on the display means AFF, for example every 10 seconds, or when specifically requested by the walker or the runner. The signals are recorded continuously over time and are stored in the memory. With this invention, a user can know the main parameters of his run or walk. Furthermore, the device according to the invention can easily be inserted in standard hiking or jogging shoes, due to its lightweight due to the use of integrated technologies enabling a reduction in weight and volume.
The following is an example of a technique used to create an algorithm to determine orientations of the foot in space, with reference to FIG. References 10 a and 10 b indicate an accelerometer and a magnetometer respectively.
They are sensors with three sensitivity axes of a known type, capable of outputting measurement data representative of the orientation, in other words an angular position of a solid S 1.
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