WO2023070141A1 - Verfahren zur fortlaufenden lagebestimmung eines beckens einer person mittels eines einzigen einsatzsensors - Google Patents
Verfahren zur fortlaufenden lagebestimmung eines beckens einer person mittels eines einzigen einsatzsensors Download PDFInfo
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- WO2023070141A1 WO2023070141A1 PCT/AT2022/060371 AT2022060371W WO2023070141A1 WO 2023070141 A1 WO2023070141 A1 WO 2023070141A1 AT 2022060371 W AT2022060371 W AT 2022060371W WO 2023070141 A1 WO2023070141 A1 WO 2023070141A1
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- sensor
- pelvis
- calibration
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- pool
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Definitions
- the invention relates to a method for continuously determining the position of a person's pelvis using a single application sensor for determining a translational change in a spatial position and a rotational change in a spatial position.
- a person's pelvis is considered the positioner for a neutral alignment of the functional spine and lower extremities.
- the pelvis shows age- and gender-specific differences with regard to the length and angle ratios, a generally valid, uniform description of its position-related stress and a clearly characterizable assignment of the pelvic orientation in different posture situations, in particular the upright position, the upright position and the upright position horizontal lying position.
- the stress situation in the lowest lumbar spine area can be positively influenced by precise pelvic statics.
- peak pressures can be determined which can be assigned to the characteristic points of the pelvis in their geometric assignment to one another and to the person in the same way.
- the characteristic positions of the ischial tuberosity, the coccyx-sacral joint, the sacrum in the area of the sacroiliac joints with the iliac crests, as well as the pubic bone and the iliac spine of the person can be determined.
- the area sensor can be used to determine the current location and position of the pelvis in a highly precise manner, as long as the person is sitting on the seat or lying on the couch and the conditions of use permit the use or integration of area sensors in a seating or couch system make possible.
- this method is also suitable, for example, as an external system for calibration, since changes in all three body levels can be reliably evaluated.
- it is possible to determine minimal changes in location and position of the pool in very limited measurement areas and thus ensure precise pool statics.
- AT 523 112 A1 is very limited, since the location and position of the pelvis can only be determined if the person is in a predominantly passive postural situation, or an additional function can be fulfilled through the use of large area sensors (e.g. pressure monitoring for decubitus prophylaxis).
- the aim of the invention is to overcome these limitations of the prior art and to enable dynamic localization and positioning of the pelvis in relation to a defined reference system, which is possible even when the person is in a prone, supine or strong position bad posture, or in dynamic posture situations.
- the method according to the invention thus provides a measuring method for assessing all posture situations that can be compared with one another.
- This goal is achieved by a method for continuously determining the position of a person's pelvis using a single deployment sensor, comprising the steps:
- Providing at least one calibration sensor and the application sensor Applying the application sensor to the body of the person in the area of the pelvis, in particular in the area of a characteristic point of the pelvis such as the pubic bone, the iliac crest, the iliac spine or the sacrum, positioning the person on the at least one calibration sensor or applying the at least one calibration sensor to the Person, in a processing unit, receiving measured values from the calibration sensor and determining a reference representation of the pelvis based on the measured values received from the calibration sensor, with the current position of the pelvis being stored as the original position, in the processing unit, receiving measured values from the application sensor, and updating the current position of the pool based only on the readings received from the inset sensor.
- the method according to the invention has the advantage that an exact determination of a reference representation with several calibration sensors or one or more flat calibration sensors only has to take place initially, after which the further, dynamic tracking of the pelvis can take place using a single sensor.
- the calibration sensors can also be removed or the person can get up from a seat with a surface sensor and the position of the pelvis can be dynamically monitored. Since the person only has to wear one sensor after the first analysis of the pelvis, the person is more comfortable to wear and has much more freedom of movement. For example, the person can simply change from a prone position to a supine position without having to repeat the measurement process with the many or complex calibration sensors.
- the application sensor according to the invention can be designed as a simple inertial measuring unit, e.g. comprising a yaw rate sensor and possibly also an acceleration sensor.
- Such sensors can be made very small, as is known from smartphone technology, for example, so that the person's freedom of movement is not impaired by the use of the sensor, although the current position of the pelvis and possibly also the current location of the pelvis can be continuously tracked.
- the deployment sensor is provided with adhesive, for example, or is incorporated into a patch or adhesive strip, and/or communicates wirelessly with the computing unit, the deployment sensor can even be worn under clothing.
- Use case may be sufficient to track only the current position of the pool and not the current location of the pool.
- the person can sit on the calibration sensor, stand up after determining the reference representation and sit on another seat.
- the use sensor is thus only designed to deliver measured values from which a rotational change of that point on which the use sensor is arranged can be determined.
- the deployment sensor can therefore only be a yaw rate sensor, for example, and cannot determine any translational change in the spatial position.
- the use sensor may also be sufficient to use the use sensor to determine a rotation about a single spatial direction in order to detect forward and backward tilting of the pelvis, from which a change in the person's posture can already be determined.
- the yaw rate sensor should be placed in the middle of the pelvis. Since this is difficult to implement in practice, a yaw rate sensor is usually used, which can determine all rotations in all three spatial directions.
- the invention thus also relates to a method for continuously determining the location and position of a person's pelvis using a single application sensor for determining a translational change in a spatial position and a rotational change in a spatial position, comprising the steps:
- the deployment sensor can be designed in particular to detect the translational change in the spatial position and the rotational change in the spatial position of the deployment sensor, applying the deployment sensor to the body of the person in the area of the pelvis, in particular in the area a characteristic point of the pelvis such as the pubic bone, the iliac crest or the sacrum, positioning the person on the at least one calibration sensor or applying the at least one calibration sensor to the person, in a computing unit, receiving measured values from the calibration sensor and determining a reference representation of the pelvis using the Measured values received from the calibration sensor, with the current location and the current position of the pelvis being stored as the place of origin and the original position, in the computing unit, receiving measured values from the use sensor, , with the measured values representing the translatory change in the spatial position and the rotary Changing the position in space can optionally include directly or, for example, can be at a predetermined distance by two measurement sets of translational changes in the position in space, and updating the current location and the deployment sensor
- the sensor is thus designed to deliver measured values from which a rotational and a translational change of that point on which the application sensor is arranged can be determined.
- the deployment sensor is usually formed by a combination of a yaw rate sensor with an acceleration sensor.
- the application sensor could be formed by two acceleration sensors at a predetermined distance or by two yaw rate sensors at a predetermined distance, which in combination again form an application sensor for the translational change in the spatial position or for the rotational change in the spatial position.
- the deployment sensor is a substantially point-shaped sensor, preferably with an area of 0.5 cm 2 - 10 cm 2 when attached to the pelvis, so that it is as unnoticed by the user as possible and is not disturbing .
- the deployment sensor is a substantially point-shaped sensor, preferably with an area of 0.5 cm 2 - 10 cm 2 when attached to the pelvis, so that it is as unnoticed by the user as possible and is not disturbing .
- only a single point deployment sensor needs to be deployed to track the position (and location, if any) of the basin.
- a surface sensor can be provided as a calibration sensor, with the surface sensor determining the position of at least two, preferably at least three, characteristic points of the pelvis from measured pressure values and determining the reference representation therefrom.
- the area sensor can be part of a seat element and/or a back element, with the seat element or the back element in turn being part of a seat, a Pad or a couch can be.
- Determining the location or position of the pelvis is a particularly proven method, since the position of the ischial tuberosities, the iliac crest, the coccyx or the pubic bone can be deduced in a known manner by detecting fewer peak pressures. Based on these positions, the size, location and position of the pelvis can be determined on the basis of anatomical considerations, as is described in detail in AT 523 112 A1. In particular, by restricting the pool configurations possible with a Mandelbrot set, these parameters and thus the reference representation can be deduced particularly quickly. If the application sensor is also used to determine the reference representation in this method, it is even possible to measure only two pressure points using the area sensor, with position information from the application sensor being used as third information for unambiguous determination of the reference representation.
- the calibration sensor(s) can be applied to predetermined characteristic points of the pool and the computing unit can determine a mutual distance between the calibration sensors and from this determine the reference representation of the pool.
- the method according to the invention can therefore also be carried out without a seat or area sensor.
- two calibration sensors can be applied to two characteristic points of the pelvis, e.g., the iliac spines, and another calibration sensor or the deployment sensor can be applied to another characteristic point, such as the sacrum. If the position or relative position of the calibration sensors or, if applicable, of the application sensor is determined, the reference representation and thus the place of origin and the original position can be determined from this.
- the area sensor use is made of the fact that the size, location and position of the pool are already clearly determined by knowing three characteristic points.
- the arithmetic unit preferably determines a mutual distance between the calibration sensors and the application sensor and thereby the location or position of the application sensor on the reference representation of the basin.
- the position of the deployment sensor can be determined in a known manner, for example via a field strength measurement if the deployment sensor has an electromechanical transceiver has, or by evaluating an image recorded by a camera if the use sensor is designed as an optical marker.
- the deployment sensor can also be attached to a characteristic point of the pool, with information about this characteristic point being stored in the processing unit and the processing unit using this information to determine the location or position of the deployment sensor on the reference representation of the pool determined.
- the use sensor can be fastened directly above the sacrum or the iliac spine, since there is usually only a particularly thin layer of tissue at these points. In these cases, the position of the deployment sensor in the reference representation is immediately known, so that the method can be carried out particularly easily.
- the translational change in the spatial position determined by the application sensor (if desired) and the rotational change in the spatial position can be converted into a movement of the pelvis using simple mathematical methods, since the position of the application sensor remains constant in the reference representation.
- the reference representation of the pelvis may be considered to be within a sphere, with the deployment sensor preferably being at the center of the sphere.
- a possibly measured translation of the application sensor then corresponds to a translation of the center point of the sphere and thus of the pelvis
- a measured rotation of the application sensor corresponds to a rotation of the sphere around the center point and thus a rotation of the pelvis. If the deployment sensor is not in the center of such a sphere, a simple coordinate transformation can be carried out in order to infer the movement of the reference representation or the movement of the pelvis from the movement of the deployment sensor.
- the method also preferably includes the step of activating a posture correction device, which is preferably arranged in a seat or in a couch, on the basis of the determined current position of the pelvis.
- the control is carried out until a desired, predetermined position of the pelvis is reached and usually takes place in the processing unit, which for this purpose can also include a further external sub-processing unit.
- the control can be designed as a feedback loop, ie after a first control, the current position of the pelvis is determined again and a check is made as to whether the desired position of the pelvis has been reached. If not, the control is carried out further or differently.
- posture correction devices are known per se from the prior art and could be formed, for example, by one or more hydraulically controllable cushions in a backrest.
- the method comprises the steps: Applying at least one additional sensor to the body of the person in the area of the spine, the application sensor and the at least one additional sensor preferably being connected by means of a strip, in the computing unit, determining a relative position of the additional sensor for said application sensor and/or a relative position to the current position and, if applicable, to the current location of the pelvis, optionally, activation of a posture correction device in a seat or in a couch based on the determined relative position and/or outputting the relative position on a screen.
- the method according to the invention can thus be expanded to the effect that a positioning of the spinal column is also measured, which is achieved by the stated determination of the position of the additional sensor relative to the pelvis.
- This can be used, among other things, to fully automatically control the stated posture correction device in order to correct the person's incorrect posture.
- the posture correction can therefore not only be determined on the basis of a pelvic position, but from the combination of pelvic position and spinal column position.
- the relative position can be determined in a suitable manner, such as by a field strength measurement or an optical method.
- the further sensor has no influence on the determination of the location and position of the pelvis, but only on the determination of the positioning of the spine.
- the invention relates to a system that is designed to carry out the aforementioned method, ie a system for the continuous position determination (and, if necessary, location determination) of a pelvis of a person by means of a single use sensor, comprising at least one calibration sensor and the use sensor, the use sensor can in particular be designed to detect the rotational change in the spatial position and, if necessary, the translational change in the spatial position of the use sensor, the use sensor being able to be applied to the body of the person in the area of the pelvis, in particular in the area of a characteristic point of the pelvis such as the pubic bone, the iliac crest or the sacrum, the system further comprising a computing unit which is designed to receive measured values from the calibration sensor, to determine a reference representation of the pelvis using the measured values received from the calibration sensor, and the current position and if necessary, to store the current location of the pool's original position or place of origin, with the computing unit also being designed to receive measured values from the application sensor, which are representative
- the system comprises a strip on which the application sensor and at least one additional sensor are attached, with the at least one additional sensor preferably being constructed in the same way as the application sensor.
- the strip may be applied, e.g., glued, substantially along the spine, with the deployment sensor attached to the lower end of the strip.
- FIG. 1 shows a schematic perspective representation of a seat with an integrated area sensor according to the prior art.
- FIG. 2 shows the seat from FIG. 1 with an additional use sensor according to the invention in a schematic perspective view.
- FIG. 3 shows another system according to the invention in a schematic perspective view.
- FIG. 4 shows the steps of the method according to the invention in a block diagram.
- FIG. 5 shows a measuring strip in which the application sensor according to the invention is used.
- FIG. 6 shows a preferred variant of the application sensor.
- FIG. 1 shows a device 100 for determining the location and orientation of a pelvis of a person sitting on a seat 10.
- the seat 10 could alternatively be a pad or couch (not shown) on which the person lies.
- Device 100 comprises a computer unit 20 and a surface sensor 11 connected to computer unit 20.
- Surface sensor 11 is arranged on a seat element 12 and/or in a back element 13 of seat 10, in particular integrated therein, with a leg element 14 of seat 10 having no Area sensor 11 has.
- the leg element 14 can also have a surface sensor 11.
- only the seat element 12 or the back element 13 can have a surface sensor 11 .
- the specified embodiments can be combined, ie, for example, the leg element 14 and the seat element 12 have a surface sensor 11 and the back element 13 has no surface sensor 11 .
- the area sensor 11 shown as an example in FIG. 1 has large-area individual sensors 15, which is why the distances can only be determined roughly. However, the area sensors used can also have many more individual sensors in a finer grid or array than is shown in FIG.
- the area sensor 11 can be shaped in such a way that it adapts at least partially to the pelvis of the person.
- the surface sensor 11 which is designed to detect sitting and support pressures exerted on the surface sensor 11 by the pelvis, coccyx and sacrum of the person, can detect the sitting and support pressures with a high degree of precision.
- the area sensor 11 is an array of sensors 15 which are selected from the group consisting of mechanical, electrical, pneumatic or hydraulic sensors.
- the area sensor is a two-dimensional array of sensors 15 which completely occupies the seat element 12 and the back element 14 of the seat 10 .
- the number of sensors 15 arranged in the array can vary and is not limited to a specific number. For example, an array with 5 ⁇ 5 sensors 15 could be used. In this way, the position of the sitting and supporting pressures exerted by the person's pelvis, coccyx and sacrum, and thus each position of the person's pelvis, can be determined with sufficient accuracy.
- the sensors 15 of the surface sensor 11 are preferably designed as flat chambers which are filled with a fluid, for example air or water.
- the area sensor 11 is connected to a computer unit 20 via channels 21 . Electrical or mechanical sensors can also be used to record the seat and support pressures and are therefore not limited to the sensors mentioned above by way of example.
- the sensors 15 can also be strain gauges that can be arranged in an array. In this case, the computer unit 20 is electrically connected to the area sensor 11 .
- the determined pressure points can be used to draw conclusions about characteristic points of the pelvis, such as the position of the pubic bone, the coccyx and sacrum, the ischial tuberosity, the iliac spine or the iliac crest. Since these characteristic points are in well-defined positions in the pelvis, a determination of the location and position of the basin can be carried out immediately, for example via the geometric relationships derived from the Mandelbrot set, as is sufficiently known from the prior art.
- such a device 100 has the disadvantage that the location and position of the pelvis can only be determined if the person is properly seated on the seat 10 and the pressure transmission function, which is dependent in particular on the degree of hardness and soft tissue, has a corresponding detection the pressure range allows.
- FIG. 2 shows a system 200 according to the invention, in which the seat 10 shown above (or a corresponding support or lounger) with a surface sensor 11 can be used, with this being used only as a calibration sensor, as explained in more detail below.
- the same reference numerals are therefore used for the seat 10, the surface element 11 and the other components as in FIG. 1 in the system 200 according to the invention from FIG. 2 and all the embodiments described for FIG. 1 can also be used in the system according to the invention.
- the seat 10 with a surface sensor is not mandatory in the system according to the invention.
- the area sensor 11 is used in the system 200 as a calibration sensor and is used to determine a current location and a current position of the person's pelvis at a "zero point in time", i.e. the location determined in this way and the position of the pelvis determined in this way are used as the place of origin and Original position determined.
- This can be done as is known in the prior art, e.g. by the surface element 11 determining the characteristic points of the pelvis via pressure points, from which the size, location and position of the pelvis can be deduced in a known manner. Since this is well known from the prior art, e.g. from the prior art cited in the introduction to the description, it will not be discussed further.
- the system includes a computing unit 30 which, as described above for FIG.
- the computing unit 30 receives measured values from the calibration sensor and determines a reference representation of the pelvis based on the measured values received from the calibration sensor.
- the reference representation could be, for example, a graphical representation that is displayed on a screen, or simply a numeric or parameterized representation of the pool that is displayed in a volatile or non-volatile memory of the computing unit 30 is stored.
- a simple parameterization can be given, for example, by storing the positions of three pressure points, eg the position of the ischial tuberosity/iliac crest and the position of the sacrum/pubic bone.
- the pelvis could also be parameterized as a sphere, the center of which is located, for example, in the sacrum of the pelvis, ie the reference representation of the pelvis can be selected within this sphere.
- the further dynamic tracking of the pelvis is carried out according to the invention by means of a deployment sensor 40 which is fixed in the area of the person's pelvis.
- a deployment sensor 40 which is fixed in the area of the person's pelvis.
- “In the area of the pelvis” is understood here to mean that the respective sensor is fastened, for example, directly above the pelvic bone on the patient's skin.
- the sensor can be attached over a larger layer of tissue, e.g., a layer of fat or muscle, over the pelvic bone.
- the sensor is therefore attached to a part of the human body that is not connected to the pelvis via another joint.
- the use sensor 40 is designed to detect a translatory change in a spatial position and a rotary change in a spatial position of the use sensor 40 .
- the deployment sensor 40 is therefore generally a so-called inertial measurement unit (IMU), usually comprising an acceleration sensor and a yaw rate sensor.
- IMU inertial measurement unit
- the deployment sensor 40 can, for example, determine a translation forward, to the side or upward, in each case starting from the person, or a rotation about a sagittal axis, transverse axis or frontal axis of the person.
- the deployment sensor 40 can also detect combined, i.e. simultaneous, translation and rotation.
- the use sensor 40 could also determine the translational change in a spatial position and a rotational change in a spatial position of a point by determining the translation or rotation of two points at a predetermined distance from one another.
- the deployment sensor 40 could therefore be formed by the combination of two acceleration sensors 80 at a predetermined distance (see FIG. 6) or by two yaw rate sensors at a predetermined distance.
- the deployment sensor 40 or the computing unit 30 could detect the translational movement or Convert the rotational movement of one of the acceleration sensors or yaw rate sensors into a rotational movement or translational movement of the other acceleration sensor or yaw rate sensor.
- a first accelerometer can be used to determine the translational motion at the point of the first accelerometer, and the translational motion of the other accelerometer combined with the predetermined distance can be used to determine the rotational motion at the point of the first-mentioned accelerometer.
- a first yaw rate sensor can be used to determine the rotational movement at the point of the first yaw rate sensor, and the rotational movement of the other yaw rate sensor can be used in combination with the predetermined distance to determine the translational movement at the point of the first-mentioned yaw rate sensor.
- the processing unit 30 receives the measurement data from the application sensor 40 for determining the translational change in a spatial position and the rotational change in a spatial position of the application sensor 40.
- the measurement data can be a direct translation and a rotation or two different translations or rotations.
- the computing unit 30 can then, if necessary, carry out a coordinate transformation, depending on the location at which the deployment sensor 40 is located on the pelvis, and can convert the translation and rotation of the deployment sensor 40 into a translation and rotation of the pelvis.
- the place of origin and the original position determined by the calibration sensor can initially be used and the measurement data supplied by the application sensor 40 can be applied to this place of origin and this original position, if necessary using a coordinate transformation, and the current place and the current position of the basin can be updated continuously .
- Updating the current location and position of the pelvis by the deployment sensor 40 can be used to allow the location and position of the pelvis to be tracked using just a single sensor 40, even if the person stands up from said seat 10 or others as described below Calibration sensors 50 removed.
- the insertion sensor 40 can, but does not have to, be applied to characteristic points of the pelvis such as the pubic bone, the iliac crest, the iliac spines or the sacrum. In particular, this simplifies the spatial assignment of the deployment sensor 40 to the reference representation used by the computing unit 30 . For example, as described above, the computing unit 30 determines characteristic points of the pelvis such as the ischial tuberosity/iliac crest and the sacrum/pubic bone/iliac spine.
- the size and shape of the pelvis can already be determined from anatomical considerations, as is known per se to a person skilled in the art. If the insertion sensor 40 is now attached to a characteristic point of the pelvis, such as the sacrum, pubic bone, iliac crest or also the iliac spine, the computing unit 30 immediately knows where the insertion sensor 40 is located on the pelvis or in the reference representation and the translation or The rotation of the deployment sensor 40 can be converted into a translation or rotation of the pelvis. If the application sensor 40 is located, for example, on the pelvis in the area of the sacrum, a rotation of the application sensor can be converted directly into a rotation of the reference representation around the point that is located in the sacrum.
- the rotation of the deployment sensor corresponds to a rotation of the sphere around its center.
- the deployment sensor 40 is attached to the pelvis in the region of the iliac spine, pure rotation of the deployment sensor will result in combined rotation and translation of a sphere centered in the sacrum.
- the computing unit 30 has, for example, an interface in which it is possible to enter the location at which the insertion sensor 40 is applied, e.g. sacrum, right or left iliac spines, etc.
- the geometric assignment of the position of the insertion sensor 40 could the reference representation in the computing unit 30 can also be automated, for example when a relative position of the application sensor 40 is determined in relation to the respective calibration sensor.
- the deployment sensor 40 could output or receive an electromechanical signal and the position of the deployment sensor 40 could be determined by a measured field strength.
- the deployment sensor 40 could be in the form of an RFID transmitter and/or RFID receiver. Position determinations using such sensors are well known to those skilled in the art.
- the position of the calibration sensor or sensors could also be determined in this way, so that the exact position of the application sensor 40 in relation to the reference representation can be known in the computing unit 30, which can facilitate a coordinate transformation.
- the surface sensor 11 could be determined, for example, in which Height (and/or at which degree of longitude or latitude) the application sensor 40 is located above the surface sensor 11, for which purpose a corresponding electromechanical sensor such as an RFID transmitter and/or RFID receiver can also be installed in or on the surface sensor 11 .
- the use sensor 40 it is therefore not absolutely necessary for the use sensor 40 to be applied to a characteristic point of the pool, but the use sensor 40 could also be attached at an arbitrary point, such as on the side of the pool, and the computing unit could, for example, have a relative position For example, the sacrum to use sensor 40 automatically detect.
- FIG. 3 shows an embodiment of a system 300 according to the invention, in which no seat 10 with surface sensor 11 is used, but the place of origin and the original position of the pelvis are determined in a different way.
- several calibration sensors 50 for example punctiform, are applied to predetermined characteristic points of the pool and the computing unit 30 determines, for example by means of measured values of the calibration sensors 50 received via lines 51, a mutual distance of the calibration sensors 50 and from this the reference representation of the pool. The determination of the mutual distance can take place as above for the use sensor 40 or in another way.
- These calibration sensors 50 could also be inertial measurement units themselves, and the geometry of the basin could be determined from corresponding measurement values.
- the calibration sensors 50 could also just be optical markers and images of the pool could be recorded with these markers, so that the distance between the markers can be determined from the images.
- the positions of the sensors are used in the computing unit in order to generate the reference representation. Such determinations for determining the reference representation or the place of origin and the original position are known per se to the person skilled in the art or at least can be implemented easily.
- These calibration sensors 50 are also only used for the initial determination of the reference representation and the further tracking is carried out with the use sensor 40 mentioned. It goes without saying that measurement data from the deployment sensor 40 could also be used to determine the place of origin or the original position.
- the computing unit 30 determines the reference representation, including the place of origin and original position, from the measured values of the two calibration sensors 50 and the application sensor 40, with the further dynamic tracking of the basin only taking place on the basis of the measurement data from the application sensor 40 , ie the calibration sensors 50 could also be removed.
- the calibration sensors 50 from FIG. 3 to be applied to the person do not have to be point-shaped, but could also be strip-shaped or flat and, for example, be stuck over an area of the pelvis, which can also include several characteristic points of the pelvis.
- such calibration sensors 50 to be applied to the person could also be combined with an area sensor 11, as shown in FIG. 2, in order to obtain a more precise reference representation.
- All connections between sensors and the computing unit described herein can be wired via lines 31, 41, 51 or wireless, e.g. via Bluetooth or another communication standard.
- step S1 the application sensor 40 is applied to the person's body in the area of the pelvis.
- step S2 the person positions themselves on the at least one calibration sensor, e.g. if the calibration sensor is designed as a surface sensor 11 on a seat 10, a couch or a support.
- the calibration sensors 50 are applied to the person's body in the area of the pelvis, as shown in FIG. 3, for example.
- step S3 the computing unit 30 determines the reference representation of the basin on the basis of the measurement data received from the calibration sensors 11, 50, and possibly also taking into account the measurement data received from the application sensor 40. Furthermore, the processing unit 30 stores the current location and the current position of the pool according to the reference representation as the place of origin and the original position.
- step S1 can take place before step S2 or also after step S2 or S3.
- the computing unit can preferably also receive a “zero signal” from the deployment sensor 40 in order to calibrate it with respect to the place of origin and the original position. It is therefore preferred if the use sensor 40 attached to the person's body at least at the time of filing the place and position of origin.
- a step S4 after the reference representation has been generated and the place of origin and the original position have been stored, the calibration sensors 50 can be removed or the person can get up from the seat 10 with the area sensor, since these measurement data are no longer required.
- step S5 which takes place at the same time as, before or after step S4, processing unit 30 receives the measured values from application sensor 40, including the translational change in the spatial position and the rotational change in the spatial position, and calculates them into a translational one, possibly using a coordinate transformation Change in the spatial position and the rotational change in the spatial position of the reference representation, so that the computing unit can update the current location and the current position of the pool based only on the readings received from the application sensor.
- This method can be used, for example, to display a graphical representation of the dynamic change in the location or position of the pelvis (with measurement points of the spine that can be expanded at will) on a screen, for example during physiotherapy.
- control elements such as a posture correction device on a seat, couch or support on which the person is located can be automatically controlled in order to automatically correct the position or posture of the person, for example, automated patient positioning management could be supported in this way using a single sensor.
- the system 200, 300 or the corresponding method can be used to combine the current location and the current position of the pelvis with other measuring systems, such as a measured posture of the spine, which is achieved, for example, in that at least one additional sensor 60 is applied to the body of the person in the area of the spine, which could be designed as an inertial measuring unit, for example like the aforementioned use sensor 40 .
- the additional sensor 60 is shown schematically in FIG. 3, but can also be combined with all other embodiments.
- the additional sensor 60 can be in the form of a point and can be fastened, for example, between the shoulder blades or in the area of a predetermined vertebra.
- a further sensor 60 or a plurality of further sensors 60 can also be arranged in the region of the cathedral processes of one or more vertebrae, in particular the three lower lumbar vertebrae L3, L4 and L5. Since the position of the spinous processes, in particular the lower three lumbar vertebrae, is based on an ideal in relation to the rest of the characteristics of the pelvis, this information can also be used to provide feedback on correct posture or posture that needs to be corrected.
- the ideal position could be determined, for example, from the first iterations or their edge curves of a Mandelbrot set, which was determined using an area sensor 11 .
- a measuring strip could also be used, which is applied along the spine and covers several spinal processes, so that the curvature of the spine can also be measured accurately.
- the computing unit 30 can then determine a relative position between the additional sensor 60 and the deployment sensor 40 and/or a relative position between the additional sensor 60 and the current location and position of the pool (e.g. the center of the aforementioned sphere).
- This relative position can be used to determine whether the person is sitting upright, for example. For example, if the relative position is too small, a hunched posture can be inferred.
- the relative position can be used to display the posture of the spine on a screen, e.g. in the course of physiotherapy, or the computing unit 30 can directly control a posture correction device in a seat or in a couch based on the determined relative position in order to correct the posture of the person to correct.
- the posture correction device can be, for example, an inflatable or fillable cushion in the backrest of a seat.
- FIG. 5 shows a practical implementation of the use sensor 40 in combination with three further sensors 60, although more or fewer further sensors 60 can also be used.
- the use sensor 40 and the additional sensors 60 are fixed in or on a strip 70, whereby the respective relative position, i.e. the distance, from the use sensor 40 to the next of the additional sensors 60 or from one of the additional sensors 60 to the next of the additional sensors 60 is predefined is.
- These distances can, for example, be stored in the processing unit 30 or fed into the processing unit 30 after the strip 70 has been applied and the distances have been measured.
- the deployment sensor 40 is again used to track the position of the pelvis, while the other sensors 60 are used to track the position of the spine.
- the additional sensors 60 can be applied to characteristic points of the spinal column, for example certain vertebrae.
- the deployment sensor 40 is typically attached to one end of the strip 70 so that the strip 70 can extend from the pelvis, where the deployment sensor 40 is attached, over the spine.
- the additional sensors 60 are constructed in the same way as the use sensor 40, although this is not mandatory.
- the strip 70 typically includes an adhesive strip for attachment to the person's back.
- the strip could be designed as a simple carrier material or with lines which connect the sensors 40,60. A common line could then be routed to the processing unit or to a transceiver, which in turn communicates with the processing unit 40 .
- FIG. 6 shows a particularly preferred example of a practical structure of an application sensor 40.
- This application sensor 40 is designed in that two acceleration sensors 80 are arranged at a predetermined distance from one another, for example 2 cm or more generally for example 1 cm to 5 cm.
- the acceleration sensors 80 can only determine a translatory movement.
- the translational movement of one of the acceleration sensors 80 can be converted into a rotational movement, so that a rotation and translation of the pelvis can be tracked.
- the accelerometers are separated by a physical spacer 90, although this is not mandatory and the distance may be permanently dictated by the manufacturing of the deployment sensor 40.
- the distance between the acceleration sensors 80 parallel to the strip 70 can be chosen.
- the system 200, 300 tracks both the current location and the current position of the pool. In simpler embodiments, however, it could also be provided that only the current position of the pelvis is tracked, i.e. the current location of the pelvis is not tracked in other embodiments.
- the deployment sensor 40 can therefore only be a yaw rate sensor, or a combination of two acceleration sensors from which a rotation is determined. The calibration sensor therefore does not have to determine the place of origin either, and a location determination in the processing unit 30 can be omitted if only the position of the pool is to be tracked.
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Description
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EP22800568.2A EP4422487A1 (de) | 2021-10-29 | 2022-10-27 | Verfahren zur fortlaufenden lagebestimmung eines beckens einer person mittels eines einzigen einsatzsensors |
CN202280085042.2A CN118434356A (zh) | 2021-10-29 | 2022-10-27 | 使用单个部署传感器连续确定人的骨盆的方向的方法 |
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ATA50858/2021A AT525616A1 (de) | 2021-10-29 | 2021-10-29 | Verfahren zur fortlaufenden Orts- und Lagebestimmung eines Beckens einer Person mittels eines einzigen Einsatzsensors |
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CN111616845A (zh) * | 2020-06-03 | 2020-09-04 | 北京积水潭医院 | 一种用于髋关节置换手术的定位测量装置和测量方法 |
WO2020182962A1 (de) * | 2019-03-12 | 2020-09-17 | Forstgarten International Holding Gmbh | Vorrichtung, system und verfahren zur bewegungsverfolgung |
WO2021072461A1 (de) * | 2019-10-16 | 2021-04-22 | Zenzmaier Cornelia | Verfahren zur orts- und lagebestimmung eines beckens einer person |
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JP3820811B2 (ja) * | 1999-08-02 | 2006-09-13 | 株式会社デンソー | 呼吸器系疾患のモニタ装置 |
WO2013070171A1 (en) * | 2011-11-08 | 2013-05-16 | Nanyang Technological University | Method and apparatus for calibrating a motion tracking system |
US10806399B2 (en) * | 2016-11-22 | 2020-10-20 | General Electric Company | Method and system of measuring patient position |
AT522485B1 (de) * | 2019-04-26 | 2020-12-15 | Margarethe Zenzmaier Cornelia | Vorrichtung zur Körperpositionierung |
AT523113A1 (de) * | 2019-10-16 | 2021-05-15 | Zenzmaier Cornelia | Vorrichtung zur Lagebestimmung eines Beckens einer Person |
WO2021152847A1 (en) * | 2020-01-31 | 2021-08-05 | Karlos Ishac | Posture detection system and posture detection method |
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- 2022-10-27 WO PCT/AT2022/060371 patent/WO2023070141A1/de active Application Filing
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WO2020182962A1 (de) * | 2019-03-12 | 2020-09-17 | Forstgarten International Holding Gmbh | Vorrichtung, system und verfahren zur bewegungsverfolgung |
WO2021072461A1 (de) * | 2019-10-16 | 2021-04-22 | Zenzmaier Cornelia | Verfahren zur orts- und lagebestimmung eines beckens einer person |
AT523112A1 (de) | 2019-10-16 | 2021-05-15 | Zenzmaier Cornelia | Verfahren zur Orts- und Lagebestimmung eines Beckens einer Person |
CN111616845A (zh) * | 2020-06-03 | 2020-09-04 | 北京积水潭医院 | 一种用于髋关节置换手术的定位测量装置和测量方法 |
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