CN103383292B - Wearable real-time monitoring and feedback alarm device and method for scissors gaits - Google Patents
Wearable real-time monitoring and feedback alarm device and method for scissors gaits Download PDFInfo
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- CN103383292B CN103383292B CN201310300304.5A CN201310300304A CN103383292B CN 103383292 B CN103383292 B CN 103383292B CN 201310300304 A CN201310300304 A CN 201310300304A CN 103383292 B CN103383292 B CN 103383292B
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Abstract
The invention provides a plantar pressure measurement based wearable real-time monitoring and feedback alarm device and method for scissors gaits. The device mainly comprises a sole provided with pressure sensors, a signal acquisition and transmission module and a portable data receiving and processing terminal. The sensors are fixed on the sole, the signal acquisition and transmission module and a power supply battery are placed at the position of a heel, and the device is wearable. The signal acquisition and transmission module sends acquired signals to the portable data processing terminal (a smart phone, a tablet personal computer and the like) in a wireless transmission mode. The data processing terminal processes the received plantar pressure signals in real time and displays the plantar pressure signals in a waveform mode. The detection method for the scissors gaits includes the steps of firstly, dividing gait periods according to signal features to find a time division point between two adjacent gait periods, which is the forefoot raising moment; secondly, calculating the dynamic pressure index (heel bearing ratio) in each gait period; and finally, comparing the dynamic pressure indexes with a set threshold, if the dynamic pressure indexes are smaller than the threshold, judging that the current gaits are scissors gaits, sending alarm signals such as sound and vibration to remind patients to correct the gaits. Meanwhile, the acquired plantar pressure data can be stored automatically and sent to doctors, parents and the like as evaluation evidences of recovery progress and references for formulation of the next recovery training.
Description
Technical field
The present invention relates to the apparatus and method of the sufficient gait Real-Time Monitoring feedback alarm of a kind of Wearable point.More particularly, it relates to a kind of sufficient gait Real-Time Monitoring feedback alarm device and method of Wearable point measured based on plantar pressure.
Background technology
Point foot is a kind of abnormal gait very common in cerebral palsy patient, main manifestations in process of standing and walk always toe land, heel lands and insufficiently even not to land.The sufficient gait of point can cause poor stability on foot, easily falls, and also can affect the growth of heel to a certain extent.Permanently effective Walking is very important for the improvement of point foot gait.This device, in Walking process, carries out Real-Time Monitoring to gait, once occur that abnormal gait is just sounded feedback signal, reminding patient to correct gait, thus improving training effectiveness.Because patient age is less, gait is more easily corrected, so the present invention is mainly for the children having sharp sufficient gait, auxiliary its carries out walking rehabilitation training.
At present, someone carries out Real-Time Monitoring by the acceleration signal gathering foot movement in walking process to point foot gait, but this device is just monitored point foot gait, not feedback alarm.In addition, somebody, by placing the method for a plantar pressure switch at heel, identifies heel strike, just to sound signal once generation heel strike.This device can be correct the complete sharp sufficient gait of identification, but can to contact to earth for heel, but the sufficient gait of light moderate point that contact time is shorter, identification that just cannot be correct.Data are sent to computer to process by wire transmission mode respectively at the device of thumb, first metatarsal bone, fifth metatarsal bone and heel placement force sensor with four by somebody, realize the Real-Time Monitoring to point foot gait and feedback alarm.But computer has certain restriction as the application scenario of data processing terminal to this device, wired transmission mode has certain danger of falling for child simultaneously.
Therefore, in this area in the urgent need to a kind of device, it is one or more that it can realize in following functions:
-carry out Real-time Collection by the characteristic signal of Wearable device to point foot patient;
-receiving processing terminal by portable data, wireless transmission method carries out real-time Treatment Analysis to the signal collected, and accurately identifies point foot gait in real time, and feedback alarm.
Summary of the invention
The object of the invention is to overcome deficiency of the prior art, there is provided a kind of structure simple, with low cost, to the glitch-free device of normal walking and accurately, reliable, simple method, Real-Time Monitoring and feedback alarm are carried out to point foot gait, thus play the active role of patient in rehabilitation training to a greater degree, improve rehabilitation efficiency.
Technical scheme of the present invention is summarized as follows: whole device comprises a pair of and is fixed with the shoe-pad of pressure transducer, two signals collecting transport modules and a portable data reception and processing terminal.Thin film resistance pressure transducer is placed in the middle part of the second os metatarsale tertium and heel respectively, measures plantar pressure in real time; Signals collecting transport module is a circuit board imbedding heel, pressure-dependent resistance signal can be converted into voltage signal, simulating signal is converted to digital signal, and by bluetooth module be sent to portable data receive and processing terminal carry out signal real-time reception, waveform display, preserve and the identification of sharp sufficient gait.Once detect that sharp sufficient gait is just sounded feedback signal, patient is reminded to carry out gait correction.Data receiver and processing terminal can be the portable sets such as smart mobile phone or panel computer.
Compared with prior art, the present invention has the following advantages:
With place the device of a plantar pressure switch at heel compared with, replace vola switch with piezoresistive pressure sensor, can identify point foot gait more accurately.By carrying out quantitative measurment to plantar pressure, according to signal characteristic dividing gait cycles, calculating dynamic plantar pressure index (heel momentum accounts for the number percent of heel and front foot momentum sum), then point foot gait being identified.This device can not only identify complete sharp sufficient gait, can also identify light moderate point foot.On the other hand, also by dynamic plantar pressure index and sharp sufficient gait incidence, the point foot degree to patient is evaluated.
With place the device of acceleration transducer at heel compared with, add feedback alarm function.Not only can evaluate point foot, can also be used for auxiliary daily rehabilitation training simultaneously, improve the subjective property of participation of patient, thus improve training effectiveness.
Compared with the device at thumb, first metatarsal bone, fifth metatarsal bone and heel placement force sensor, portable terminal is more suitable for using for children, and environment for use does not have too much restriction.On the other hand, wireless transmission mode can eliminate potential fall risk.Finally, decrease number of sensors, also make cost lower.
Accompanying drawing explanation
Fig. 1 is the general structure schematic diagram of this invention.
Fig. 2 is sufficient gait Real-Time Monitoring feedback alarm device assembling schematic diagram (left foot) of Wearable point.
Fig. 3 is that portable data receives and processing terminal user basic information interface schematic diagram.
Fig. 4 is that portable data receives and processing terminal waveform shows and operation interface schematic diagram.
Fig. 1 is according to a system global structure schematic diagram of the present invention.Its device mainly comprises insole type sole pressure measuring system, signals collecting transport module and portable data and receives and processing terminal.
Fig. 2 is device according to an embodiment of the invention assembling schematic diagram.This is wearable device.Signals collecting transport module and to the chargeable lithium cell compact that device is powered, is embedded in heel.
Fig. 3 is that portable data according to an embodiment of the invention receives and processing terminal user basic information interface schematic diagram.Mainly comprise typing and the confirmation of the essential informations such as address name, sex, age, height and body weight.
Fig. 4 is that portable data according to an embodiment of the invention receives and processing terminal shows and operation interface schematic diagram.Mainly comprise a threshold value load module, two real-time display modules of waveform, a start button and one are placed with the shoe-pad schematic diagram module of sensor.
Embodiment
Below in conjunction with accompanying drawing and embodiment, the present invention is described in further detail:
According to one embodiment of present invention, as shown in Figure 1, be the general structure schematic diagram that this invents.Patient puts on the footwear shown in Fig. 2, and have the shoe-pad (2) of placement force sensor (4) in footwear, sensor is connected to signals collecting transport module (5).Signals collecting transport module mainly comprises a microcontroller C8051F410, a multi channel signals selector switch ADG1608, an operational amplifier OPA340, a bluetooth module HC06, an electric pressure converter REG1117 and peripheral resistance capacitance etc.Microcontroller major function is the collection of the whole signal of control realization, coding and transfer function; The effect of multi channel signals selector switch selects the signal of two passages, transmits to ensure that two paths of signals is non-interfering; Track to track operational amplifier uses as voltage follower, can reduce distortion and the interference of signal; Bluetooth module realizes the wireless transmission to signal.Whole module adopts chargeable lithium cell (6) power supply, and compact is simply easy to operate.Data receiver and processing terminal adopt portable equipment, as smart mobile phone, and panel computer etc.Main realization to the reception of data, real-time waveform display, preserve, dynamic plantar pressure index (heel momentum accounts for the number percent of heel and front foot momentum sum) calculates and the identification of sharp sufficient gait.The method judges point foot gait based on the dynamic plantar pressure index in each gait cycle.If dynamic plantar pressure index is less than some threshold values, be then judged as sharp sufficient gait, feedback signal of sounding, remind patient to correct gait.Threshold value manually can be arranged easily according to the point foot degree of patient self, both the average dynamic plantar pressure index of patient had been higher than in principle, training is acquired a certain degree of difficulty, ensures that patient oneself has the ability to reach the requirement of threshold value, avoids reporting to the police simultaneously again always.
According to one embodiment of present invention, the assembling schematic diagram of device for this reason as shown in Figure 2.Signals collecting transport module adopts chargeable lithium cell (6) power supply, and whole device can be placed on heel, very light, noiseless to patient's daily life.(2) be the shoe-pad being placed with thin film resistance pressure transducer (4).FSR-400(Interlink Electronics selected by sensor, the U.S.), this sensor is thin film resistance pressure transducer, and thickness is only 0.35mm, the circle of induction area to be diameter be 5.08mm, thin and the characteristic of softness makes it to gait without impact.
According to one embodiment of present invention, a pressure transducer is respectively placed at front foot and hindfoot areas.The plantar pressure feature of the sufficient gait of point is that heel load-bearing is few, so account for the number percent of heel and front foot momentum sum with heel momentum and dynamic plantar pressure index detects the sufficient gait of point.In order to calculate the momentum of heel and front foot, need to measure the pressure of front foot and heel.In order to reduce costs, simplify gait determination methods, respectively placing a sensor at front foot and heel.Represent front foot pressure with the pressure at second and os metatarsale tertium place, the pressure in the middle part of heel represents heel pressure.Two positions are all the main load-bearing districts in walking process, thus can with the pressure of these two zonules approximate represent front foot and heel pressure respectively.
According to one embodiment of present invention, portable data reception and processing terminal mainly realize reception, in real time display and the process of data.Judgement for point foot is divided into three steps: first divide gait cycle, namely finds the time division point of two adjacent gait cycles; Second calculates the dynamic plantar pressure index (heel momentum accounts for the number percent of heel and front foot momentum sum) in a gait cycle; The threshold value of the dynamic plantar pressure index calculated and setting compares by the 3rd, is less than threshold value and is then judged as sharp sufficient gait, send alerting signal, otherwise be judged as normal gait.Generally, gait cycle to refer to from a heel strike to the heel strike of one time, same underfooting.But because the heel strike of point foot patient is abnormal, so can not split gait with heel pressure signal.The segmentation moment of moment as gait cycle is lifted using front foot in this device.In order to find front foot to lift the moment, first calculate the first differential of front foot pressure, i.e. the difference of two adjacent force value, negative value represents the process that front foot pressure reduces, and the process that front foot lifts, on the occasion of then representing the process of front foot pressure increase.The moment that the first differential of front foot pressure is minimum is exactly that front foot lifts the fastest moment, becomes large after this gradually, and one that finally tends to be steady less value, Here it is, and front foot lifts the moment.By experiment, the first differential previous moment of front foot pressure is less than-2kpa, and the moment that current time is greater than-2kpa lifts the moment as front foot, i.e. the cut-point of gait cycle.Two front foots lift just to think a complete gait cycle between the moment.Calculate the front foot within a gait cycle and heel momentum, then the dynamic plantar pressure index calculated (heel momentum accounts for the number percent of heel and front foot momentum sum) is compared with threshold value, if be less than threshold value, then this gait is sharp sufficient gait, toggle sound feedback signal, reminds patient's self-recision gait, otherwise, then this gait is normal gait, not trigger feedback signal, enters the judgement of next gait cycle.
According to one embodiment of present invention, be illustrated in figure 3 portable data receive and processing terminal display and operation interface schematic diagram.Comprise user basic information module (9) and rehabilitation training module (10), by user basic information module (9) can the name (13) of typing patient, sex (18), the age (14), height (17) and body weight (15); Rehabilitation training module (10) comprises a threshold value load module (7), two waveform display modules (8) and is placed with the shoe-pad schematic diagram module (12) of thin film resistance pressure transducer, can carry out real-time waveform display, preservation and process to the received signal.Manually can insert the threshold value (0-100) according to patient's point sufficient degree personalization setting in threshold value load module (7), be defaulted as 30; The whole bottom pressure squiggle in front and back of two waveform display window (8) difference Real time dynamic display left and right pin, the curve of the front and back foot pressure curve different colours of same pin is presented in same window; The beginning of this device of switch co-controlling above start button (11) and data receiver and signals collecting transmission circuit plate (5) and end.
Only need during use first manually to input threshold value, the toggle switch in opening signal collect and transmit module, and click the start button on processing terminal, just automatically can start data transmission and display in real time, preserve and process.End only again need click start button, and close toggle switch.
drawing reference numeral explanation
Footwear body 1, shoe-pad 2, sole 3, thin film resistance pressure transducer 4, signals collecting transport module 5, chargeable lithium cell 6, threshold value load module 7, waveform display window 8, user basic information module 9, rehabilitation training module 10, start button 11, be placed with the shoe-pad schematic diagram module 12 of thin film resistance pressure transducer, name load module (13), age input module (14), body weight load module (15), height input user basic information confirms module (16), module (17), sex load module (18).
Should be understood that, just to illustrate but not determinate in the above description described and carry out the present invention in illustrating, and do not depart from as appended claims under the prerequisite of the present invention that limits, can various change, distortion be carried out to above-described embodiment and/or revise.
Claims (9)
1. the sufficient gait Real-Time Monitoring feedback alarm device of Wearable point, comprises the shoe-pad (2), signals collecting transport module (5) and the portable data that are fixed with sensor and receives and processing terminal; It is characterized in that: described shoe-pad measures plantar pressure or pressure in real time by sensor (4); The signal collected wirelessly sends to described portable data to receive and processing terminal by described signals collecting transport module; Described portable data receives and processing terminal receives the signal collected, and carry out real-time waveform display and process, gait cycle is divided and point foot gait is identified, if walking step state is sharp sufficient gait, then send feedback signal, remind patient to correct gait; Described portable data receives and processing terminal comprises user basic information module (9) and rehabilitation training module (10); Described rehabilitation training module (10) comprises a threshold value load module (7), two waveform display modules (8) and shoe-pad schematic diagram module (12), can carry out real-time waveform display, preservation and process to the received signal; Calculate the front and back foot momentum in each gait cycle according to the plantar pressure of gait cycle division result and front and back foot, and then calculate the dynamic plantar pressure index in each gait cycle, namely heel momentum accounts for the number percent of heel and front foot momentum sum.
2. device according to claim 1, is characterized in that, described sensor (4) is film piezoresistive transducer, is placed on second and os metatarsale tertium position and the heel medium position of front foot respectively.
3. device according to claim 1, it is characterized in that, described point sufficient gait Real-Time Monitoring feedback alarm device is Wearable, and signals collecting transport module (5) is powered by chargeable lithium cell (6), be embedded in heel, on gait without impact.
4. device according to claim 1, it is characterized in that, pressure-dependent resistance signal is converted into voltage signal by described signals collecting transport module, and carry out analog/digital conversion output digit signals, then by bluetooth module, described digital signal is sent to described data receiver and processing terminal, described data receiver and processing terminal are smart mobile phone or panel computer.
5. device according to claim 1, it is characterized in that, described data receiver and processing terminal by user basic information module (9) can the name (13) of typing user, sex (18), the age (14), height (17) and body weight (15).
6. device according to claim 1, is characterized in that, described data receiver and processing terminal can according to the signal characteristics collected, and find the time division point of adjacent gait cycle, namely front foot lifts the moment, thus divides gait cycle.
7. device according to claim 1, is characterized in that, is compared by the dynamic plantar pressure index in each gait cycle with threshold value, if this index is less than threshold value, then current gait is sharp sufficient gait, thus trigger feedback signal, remind patient to carry out gait correction, improve rehabilitation efficiency.
8. device according to claim 7, is characterized in that, described threshold value can carry out personal settings according to the sufficient degree of patient's point, corresponding numerical value is inputed to the threshold value load module (7) on operation interface.
9. device according to claim 1, is characterized in that, the start button (11) of switch and data receiver and processing terminal that described device only need open described signals collecting transport module can be started working.
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