CN101520355A - Plantar pressure distribution signal acquisition system - Google Patents
Plantar pressure distribution signal acquisition system Download PDFInfo
- Publication number
- CN101520355A CN101520355A CN200910301297A CN200910301297A CN101520355A CN 101520355 A CN101520355 A CN 101520355A CN 200910301297 A CN200910301297 A CN 200910301297A CN 200910301297 A CN200910301297 A CN 200910301297A CN 101520355 A CN101520355 A CN 101520355A
- Authority
- CN
- China
- Prior art keywords
- multiplexer
- top plate
- pressure distribution
- sensing
- lower plywood
- 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.)
- Granted
Links
- 229920001971 elastomer Polymers 0.000 claims abstract description 36
- 239000005060 rubber Substances 0.000 claims abstract description 36
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims abstract description 25
- 229910052802 copper Inorganic materials 0.000 claims abstract description 25
- 239000010949 copper Substances 0.000 claims abstract description 25
- 239000011120 plywood Substances 0.000 claims description 40
- 230000004807 localization Effects 0.000 claims description 15
- 101000746134 Homo sapiens DNA endonuclease RBBP8 Proteins 0.000 claims description 9
- 101000969031 Homo sapiens Nuclear protein 1 Proteins 0.000 claims description 9
- 102100021133 Nuclear protein 1 Human genes 0.000 claims description 9
- 239000012528 membrane Substances 0.000 claims description 6
- 230000008447 perception Effects 0.000 claims description 6
- 230000000087 stabilizing effect Effects 0.000 claims description 6
- 239000012530 fluid Substances 0.000 claims description 4
- 230000007704 transition Effects 0.000 claims description 4
- 238000005253 cladding Methods 0.000 abstract 2
- 210000001217 buttock Anatomy 0.000 abstract 1
- 238000012856 packing Methods 0.000 abstract 1
- 238000005259 measurement Methods 0.000 description 17
- 238000010586 diagram Methods 0.000 description 9
- 238000003491 array Methods 0.000 description 8
- 238000003745 diagnosis Methods 0.000 description 7
- 206010012601 diabetes mellitus Diseases 0.000 description 6
- 230000006870 function Effects 0.000 description 6
- 238000000034 method Methods 0.000 description 6
- 230000008859 change Effects 0.000 description 5
- 238000012360 testing method Methods 0.000 description 5
- 238000005070 sampling Methods 0.000 description 4
- 208000004067 Flatfoot Diseases 0.000 description 3
- 238000006243 chemical reaction Methods 0.000 description 3
- 238000013461 design Methods 0.000 description 3
- 238000001514 detection method Methods 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 238000011160 research Methods 0.000 description 3
- 206010061159 Foot deformity Diseases 0.000 description 2
- 206010043101 Talipes Diseases 0.000 description 2
- 206010043255 Tendonitis Diseases 0.000 description 2
- 239000011888 foil Substances 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 230000007774 longterm Effects 0.000 description 2
- 210000003141 lower extremity Anatomy 0.000 description 2
- 210000002303 tibia Anatomy 0.000 description 2
- 241000218691 Cupressaceae Species 0.000 description 1
- 206010056340 Diabetic ulcer Diseases 0.000 description 1
- 206010019468 Hemiplegia Diseases 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 238000004458 analytical method Methods 0.000 description 1
- 238000013459 approach Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000009530 blood pressure measurement Methods 0.000 description 1
- 239000002775 capsule Substances 0.000 description 1
- 239000006229 carbon black Substances 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 239000012141 concentrate Substances 0.000 description 1
- 239000013078 crystal Substances 0.000 description 1
- 230000006837 decompression Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 201000010099 disease Diseases 0.000 description 1
- 208000037265 diseases, disorders, signs and symptoms Diseases 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000000839 emulsion Substances 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 210000003414 extremity Anatomy 0.000 description 1
- 239000012467 final product Substances 0.000 description 1
- 230000005021 gait Effects 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 210000003041 ligament Anatomy 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 210000003205 muscle Anatomy 0.000 description 1
- 201000001119 neuropathy Diseases 0.000 description 1
- 230000007823 neuropathy Effects 0.000 description 1
- 230000000399 orthopedic effect Effects 0.000 description 1
- 230000010355 oscillation Effects 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 230000007170 pathology Effects 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 208000033808 peripheral neuropathy Diseases 0.000 description 1
- 229920002635 polyurethane Polymers 0.000 description 1
- 239000004814 polyurethane Substances 0.000 description 1
- 239000000047 product Substances 0.000 description 1
- 238000012827 research and development Methods 0.000 description 1
- 230000004044 response Effects 0.000 description 1
- 229920002379 silicone rubber Polymers 0.000 description 1
- 238000004088 simulation Methods 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
Images
Abstract
A plantar pressure distribution signal acquisition system comprises a sensing unit and a control unit. The sensing unit is fixed with feet by a locating foot packing sheet and is a film pressure sensing measurer comprising an upper sheet and a lower sheet; parallel copper claddings are distributed on one of the faces of the upper sheet and the lower sheet at intervals; conductive rubbers are distributed on the copper claddings at intervals, and the conductive rubbers on the upper sheet and the lower sheet are contacted with one another to form sending dots. The control unit is a main control chip; one signal input terminal of the main control chip is connected with two signal output terminals and enabling terminals of a multiplexer of the upper sheet, and the other signal input terminal of the main control chip is connected with two signal output terminals and enabling terminals of a multiplexer of the lower sheet. The system is a large-area pressure distribution measuring device by taking the conductive rubber as a sensing element, and has the advantages of high reliability and precision and low cost, can dynamically measure pressure distribution of a plane and a curved surface in a large-area range in real time, and is suitable for measuring the pressure distribution of vola, buttocks and the like.
Description
Technical field
The invention belongs to the pressure measurement technology field, particularly a kind of test macro that is used to measure the distribution situation of foot pressure.
Background technology
Along with development of science and technology, the demand that contact pressure detects is also more and more.The tradition contact pressure detects and concentrates on the single-point detection mostly.But a lot of industries all need to measure multiple spot simultaneously, obtain the distribution situation of contact pressure.Industrial, the detection of curved surface pressure is a focus of recent researches.Detect curved surface pressure distribution situation and lay a plurality of sensing points usually, the rubber that sensing unit adopts conductive particle to fill.When the external world exerted pressure, the resistance of conductive rubber changed, and then caused the variation of voltage drop.By detecting voltage drop, and then obtain the size and the distribution situation of ambient pressure.Medically, body presses the measurement that distributes always to be the research focus.For the people of hemiplegia, long-term seat crouches and causes a lot of diseases easily.People wish to detect patient and sit stressing conditions for sleeping in, and then find suitable decompression method.In addition, plantar pressure distributes can reflect the healthy of a people, such as how judging whether diabetes and severity extent.
More in the market is to adopt foil gauge as pressure-sensing device, as patent CN2540911, measuring object is the semi-girder strain pressure transducer, yet use foil gauge as sensing element, distance between two sensing points there is certain limitation, and cost is high slightly, is not suitable for measuring the pressure distribution situation of large-area planars such as foot and curved surface.Patent CN201060206 can measure plantar pressure, but measure dot number is less.The patent US5505072 of U.S. Tekscan company designed the circuit of variable gain, but this method cost is too high for the pressure of measuring wide region changes.
Summary of the invention
In order to overcome the deficiencies in the prior art, the invention provides a kind of plantar pressure distribution signal acquisition system, solve the technical matters that traditional pressure testing system is not suitable for measuring the pressure distribution situation of foot; And solve traditional problem that the pressure testing system reliability is low, precision is low, cost is high.
The technical solution adopted for the present invention to solve the technical problems is:
A kind of plantar pressure distribution signal acquisition system, but the sensing unit that comprises a perception ambient pressure, one can convert the ambient pressure of sensing unit perception to the A/D converting unit of pressure signal, one can select the sensing point of sensing unit to carry out the control module of voltage transitions, one pressure signal that control module can be obtained sends the USB unit of host computer to, it is characterized in that:
Described sensing unit is fixing with foot by localization package foot sheet, sensing unit is the membrane type pressure sensing measuring appliance that comprises top plate and lower plywood, top plate and lower plywood wherein the one side on all be intervally distributed with parallel deposited copper, apply on the copper and be intervally distributed with conductive rubber, conductive rubber on the top plate contacts with conductive rubber on the lower plywood and is in the same place, become sensing point, and the deposited copper on the top plate intersects in opposite directions with deposited copper on the lower plywood; Deposited copper on the described top plate is connected with the passage input end of a top plate multiplexer, and the deposited copper on the described lower plywood is connected with the passage input end of lower plywood multiplexer.
Described control module is a main control chip, a signal input part of main control chip is connected with Enable Pin with two signal output parts of top plate multiplexer, another signal input part of main control chip is connected with Enable Pin with two signal output parts of lower plywood multiplexer, the COM1 end of top plate multiplexer is connected with the signal input part of A/D converting unit, above-mentioned COM1 end also is connected with the voltage stabilizing chip through a precision resistance, the COM2 end ground connection of described lower plywood multiplexer.
The signal input part of A/D converting unit is connected with the COM1 end of top plate multiplexer, and the signal output part of A/D converting unit is connected with the USB unit.
Two other signal input part of main control chip can be connected with Enable Pin with the output channel of a sign multiplexer.
Described top plate and lower plywood all can be flexible pcb board, i.e. printed circuit board (PCB).
Described A/D converting unit and USB unit can assemble a capture card.
Conductive rubber diameter on the described sensing unit is not less than 4mm, and the distance between the sensing point is for being not less than 5mm.
Sensing point in the described sensing unit is equidistantly to distribute or the unequal-interval distribution.
The quantity of described sensing point can be 4 * 4 or 4 * 4 multiple.
Localization package foot sheet has a vola pad part, the flexible projection of upper surface of vola pad part, one side of vola pad part is extended sufficient face cover part, be connected with a secondary vola side hasp on the lateral edges of foot face cover part and the edge of vola pad part, the rear portion of foot face cover part is extended heel and is surrounded part, and heel surrounds the edge of part and the back edge of sufficient face cover part is connected with a secondary heel portion fixed agraffe.
Described localization package foot sheet can be the hollow elasticity body, is filled with fluid in its internal cavities.
Beneficial effect of the present invention is as follows:
The present invention is in the market extensive contact pressure distribution measuring demand, overcome the weak point of prior art, what propose is a kind of based on the large tracts of land pressure distribution measurement mechanism of conductive rubber as sensitive element, it cooperates corresponding pressure data Acquisition Circuit, but the pressure distribution of real time dynamic measurement large tracts of land scope inner plane and curved surface is applicable to local pressure distribution situations such as measuring vola, burst end.
The present invention adopts conductive rubber as sensitive element, can measure the large tracts of land pressure distribution, and the sensing point distance is the shortest can to reach 5mm.The present invention effectively reduces cost on the basis that guarantees measurement performance, it determines to use background at first earlier, select conductive rubber that a resistance can change within the specific limits as sensitive element then, and the resistance that uses high precision, a low temperature to float carries out dividing potential drop, both simplified circuit, save cost, also guaranteed measuring accuracy.The present invention is made up of pressure signal harvester and upper-computer processing software two parts, link to each other by USB interface between the two, can measure the distribution situation of large-area planar or curved surface pressure, the distribution of measuring sensing point can have multiple choices, such as 8 * 16,16 * 32,24 * 32 or the like.
For the large tracts of land array measurement, how locating starting point is very important work, the present invention adopts a slice to indicate multiplexer and is connected on the main control chip of control module or the remaining multiplexed port of multiplexer and produces the sign level, thereby determine reference position, accurately locate the measured point, id signal is made up of a series of level, when level when low, the direct ground connection of precision resistance, the dividing potential drop of A/D mouth is zero, when level when being high, precision resistance and conductive rubber series connection back ground connection, the dividing potential drop of A/D mouth is the dividing potential drop of conductive rubber.Because conductive rubber resistance under no pressure is very big, so the dividing potential drop of A/D mouth approaches supply voltage at this moment.The sign level is the id signal of the beginning of whole circulation, this id signal has been arranged, just can effectively determine starting point, thereby data and actual spot of measurement are mapped, even produce situations such as outage, the accidental operation irregularity of USB in the use, caused sampled data to be damaged, the next frame data also can reliably be guaranteed.All id signal can be detected before the each circulation of the present invention, the validity of data can be guaranteed.
Different medial temperatures in season have certain difference, on the same day, daytime and evening temperature also variant, variation of temperature can be brought certain influence to measurement result, and the precision resistance dividing potential drop that the present invention uses high precision, low temperature to float, be applicable to various throughout the year common weather temperature, simultaneously, only carry out dividing potential drop, simplified circuit design with a resistance, improved system reliability, provided cost savings.Experiment shows, for the measurement of plantar pressure in the embodiment of the invention, and the array for 24 * 24, speed can reach 60 frames/s, in pressure limit 0～3 * 10
5Within kPa (corresponding resistance is between 1-30K), maximum relative error is less than 5%.
But the present invention's quick diagnosis go out to stand and move in foot's function and the state of foot's deformity.When it can be analyzed the experimenter and walks the pressure at each position, vola, momentum, time response and foot in the feature of turning up, and the change in displacement situation etc. of center of gravity when walking.The capsule information of relevant lower limb holding capacity and the effect of each muscle in walking can be provided.The load of foot when walking also can be really measured in kinetic measurement.For example: the change of paces length and width, the position of talipes varus and talipes valgus, the area of foot kiss the earth, the function of toe, joint, ligament or the like.
The present invention also can do static measurement, also can write down dynamic data.Can be used for: rehabilitation assessment, diabetes diagnosis and the design of design of analyzing, assisting the improvement footwear and orthopedics, the on-the-spot test that footwear are carried out research and development, gait analysis, researches on exercise biomechanics, various sports, the monitoring of long-term motion load.
The present invention is not only a cover pressure Distribution Test system, more can be used for the diagnosis of lower limb and foot, for example, can be used for the pedopathy diagnosis of orthopaedics, as the intoe phenomenon, Achilles tendinitis, crossbows subsides, flat foot, shin bone damage etc., the present invention also can be used for the diagnosis in the high-risk zone of diabetic's ulcer, this is because the diabetic because peripheral vessel circulation is bad, at the far-end of limbs bad pathology usually takes place easily, is squeezed in footwear by the trick minister phase, easier festering, promptly form diabetes, the present invention can obtain the accurate pressure distribution value in diabetic vola, analyzes detailed vola dynamic pressure distribution plan then and just can discern neuropathy sex change diabetes at an easy rate.
Localization package foot sheet among the present invention relatively is applicable to plantar pressure and strand base pressure force measurement, localization package foot sheet adopts filling liquid method in the hollow elasticity body pad, can bring into play the plasticity of elastic body and liquid, make its each male and female face close proximity with foot, impel membrane type pressure sensing measuring appliance to cooperate closely with the region of interest of foot, reduced measuring error, improved measuring accuracy, the measurement needs of lopsided whole pressure have particularly been satisfied, be particularly useful for the foot intoe, Achilles tendinitis, crossbows subsides, multiple taliped measurements such as flat foot or shin bone damage can be measured the foot's function in standing and moving and the state of foot's deformity fast.
Principle of work of the present invention: sensing unit is a conductive rubber, its resistance becomes corresponding relation with ambient pressure, when the external world exerts pressure, the resistance of conductive rubber changes, and then causes the variation of tested voltage, detects the variation of voltage, just can calculate the size of ambient pressure, control circuit is selected different sensing points by specific time sequence, and searching loop just can obtain the pressure distribution situation of whole measurement plane or curved surface.
Description of drawings
The present invention is further described below in conjunction with drawings and Examples.
Fig. 1 is a system architecture synoptic diagram of the present invention.
Fig. 2 is the structural representation of top plate of the sensing unit of 4 * 4 arrays.
Fig. 3 is the structural representation of lower plywood of the sensing unit of 4 * 4 arrays.
Fig. 4 is the synoptic diagram of pressure data Acquisition Circuit embodiment one of the sensing unit of 4 * 4 arrays.
Fig. 5 is the synoptic diagram of pressure data Acquisition Circuit embodiment two of the sensing unit of 4 * 4 arrays.
Fig. 6 is the program circuit synoptic diagram of control module main control chip.
Fig. 7 is the sequential chart of multiplexer.
Fig. 8 is the program circuit synoptic diagram of upper-computer processing software.
Fig. 9 is the front schematic view of localization package foot sheet.
Figure 10 is the schematic rear view of localization package foot sheet.
Figure 11 is the elevational schematic view of Fig. 8.
Figure 12 is the partial schematic sectional view of localization package foot sheet.
Figure 13 is the sufficient synoptic diagram that steps down on the localization package foot sheet.
Reference numeral: 1-localization package foot sheet, 2-vola pad part, 3-sufficient face cover part, 4-heel surround part, 5-vola side hasp, 7-heel portion fixed agraffe, 8-elastic bumps, 10-foot, 11-fluid, 12-lower plywood multiplexer, 13-top plate multiplexer, 14-sign multiplexer;
9-membrane type pressure sensing measuring appliance, 9.1-top plate, 9.2-lower plywood, 9.3-deposited copper, 9.4-conductive rubber.
Embodiment
Embodiment one is referring to shown in Figure 1, this plantar pressure distribution signal acquisition system, but the sensing unit that comprises a perception ambient pressure, one can convert the ambient pressure of sensing unit perception to the A/D converting unit of pressure signal, one can select the sensing point of sensing unit to carry out the control module of voltage transitions, and a pressure signal that control module can be obtained sends the USB unit of host computer to.Referring to Figure 13, described sensing unit is fixing with foot 10 by localization package foot sheet 1.
The present invention adopts multiplexed chip of a slice or remaining multiplexed port to produce id signal, thereby determines reference position.For guaranteeing the validity of data, all need to detect id signal before each cycle detection.
With the measuring object of plantar pressure, be described in detail as follows in conjunction with each drawings and Examples as embodiment:
The composition of large tracts of land pressure distribution signal acquisition circuit of the present invention system as shown in Figure 1, be made up of pressure signal harvester and upper-computer processing software two parts, the pressure signal harvester is made up of control module, sensing unit, A/D converting unit and USB unit.In described control module, main control chip is by particular row and particular column in IO mouth and the multiplexer selection sensing unit, and then select some sensing points, after having selected specific sensing point, main control chip control A/D converting unit is carried out voltage transitions, and the pressure signal data that obtain send upper-computer processing software to by the USB unit.Described upper-computer processing software is utilized and is demarcated good program calculating sensing point pressure size in advance.Then data are analyzed, comprised functions such as drawing, diagnosis.
Present embodiment is an example with 4 * 4 arrays, sensing unit structure such as Fig. 2, shown in Figure 3, sensing unit is the membrane type pressure sensing measuring appliance 9 that comprises top plate 9.1 and lower plywood 9.2, top plate 9.1 and lower plywood 9.2 wherein the one side on all be intervally distributed with parallel deposited copper 9.3, apply on the copper 9.3 and be intervally distributed with conductive rubber 9.4, conductive rubber on the top plate 9.1 contacts with conductive rubber on the lower plywood 9.2 and is in the same place, become sensing point, and the deposited copper on the top plate intersects in opposite directions with deposited copper on the lower plywood.Referring to Fig. 4, the deposited copper on the top plate 9.1 is connected with the passage input end of a top plate multiplexer 13, and the deposited copper on the lower plywood 9.2 is connected with the passage input end of lower plywood multiplexer 12.Described top plate 9.1 is flexible pcb board with lower plywood 9.2, has only one side to apply copper, and upper and lower laminate contacts with conductive rubber by applying copper, all insulate in other zone.Left side figure is a top plate among Fig. 2, and right figure is a lower plywood, and conductive layer is flexible pcb board, has only one side to apply copper.Distance between the outward flange of adjacent two conductive rubbers is the distance between the sensing point.Consider that conductive rubber has the dimensions requirement, and have certain expansion behind the pressurized, the conductive rubber diameter on the general sensing unit is not less than 4mm, and the distance between the sensing point is not less than 5mm.In the present embodiment, what we selected for use is the card punch of 6mm, so the diameter of conductive rubber also is 6mm, and thickness is 1mm.Distance between the sensing point is 12mm.The deposited copper diameter of laminate is 6mm up and down.Conductive rubber is common carbon black-filled silicon rubber.This sensing unit can be measured large-area planar or curved surface pressure.In the present embodiment, the sensing point in the sensing unit is equidistantly to distribute, and the quantity of sensing point is 4 * 4, but in other embodiments, sensing point also can be for unequal-interval distributes, and the quantity of sensing point also can be 4 * 4 multiple.
Fig. 4 and Fig. 5 are the pressure data Acquisition Circuit figure of 4 * 4 arrays.Described control module is a main control chip, a signal input part of main control chip is connected with Enable Pin with two signal output parts of top plate multiplexer, another signal input part of main control chip is connected with Enable Pin with two signal output parts of lower plywood multiplexer, the COM1 end of top plate multiplexer 13 is connected with the signal input part of A/D converting unit, and above-mentioned COM1 end is also through a precision resistance R
AccurateBe connected the COM2 end ground connection of described lower plywood multiplexer with the voltage stabilizing chip.Present embodiment is an example with 4 * 4 arrays, and 4 * 4 sensing points in the sensing unit are respectively S1～S16, are indicated in top plate.Voltage stabilizing chip VCC (5V source of stable pressure) and precision resistance R
AccurateLink to each other, connect selecteed sensing point among S1～S16 then, this sensing point is connected to lower plywood 9.2 by conductive rubber, is connected to simulation ground.Top plate is divided into 4 row, and lower plywood is divided into 4 row.In described control module, main control chip passes through particular row and the particular column in IO mouth and the multiplexer selection sensing unit, and then selects some sensing points.In the present embodiment, if main control chip selects the IO1 and the IO0 of lower plywood multiplexer 12 to be respectively low level and high level, then gating the C1 end of lower plywood multiplexer 12, promptly gating the 2nd row of lower shoe.If main control chip selects the IO1 and the IO0 of top plate multiplexer 13 to be respectively high level and low level, then gating the C2 end of top plate multiplexer 13, promptly gating the 2nd row of top plate.Like this, S6 is the sensing point of choosing.
When exerting pressure on top plate, the resistance of conductive rubber changes, and the voltage drop that X is ordered also can change.By detecting the voltage that X is ordered, can derive the pressure size.Control circuit according to a certain select progressively S1～S16 after, start the A/D converting unit, the pressure data that is converted to sends upper-computer processing software to by the USB unit.
For conductive rubber, we know power P and its resistance R that the external world applies
SCorresponding relation is arranged:
Owing to have seepage flow zone, pressure P and resistance R
SThe relation of being inversely proportional to.The corresponding relation of the voltage that the resistance of conductive rubber and X are ordered is:
V wherein
XThe voltage of ordering for X; Vcc is the voltage stabilizing chip; R
AccurateResistance for precision resistance; R
SResistance for conductive rubber in the selecteed S1-S16 sensing point; R
mBe multiplexer resistance.From the formula as can be seen, V
XAnd R
SBe directly proportional, but be not linear relationship.In the present embodiment, Vcc is 5V, R
SVariation range be 1-30K Ω, get R
AccurateBe 15K Ω.
In the present embodiment, the voltage stabilizing chip is the MAX603 of MAXIM company.The fixing output of this chip 5V voltage, maximum output current can reach 500mA.Particulars about this chip can be with reference to the official website " www.maxim-ic.com.cn " of MAXIM.
In the present embodiment, precision resistance is the precision resistance that Beijing Ni Ji Electron Technology Co., Ltd produces, and resistance is 15.1K Ω, temperature drift is lower than ± and 10ppm ℃.Within 0～3 * 105 kPas of pressure limits (corresponding resistance is between 1-30K), maximum relative error is less than 5%.
In order to identify the beginning of whole circulation, need to produce id signal, in order to produce flag, except software program, also need other port on the hardware, the remaining multiplexing port of general using multiplexer, if the residue multiplexing port is arranged, then utilize main control chip just can control its port, but want in advance one of the port that is re-used to be put high level, put low level for one.Referring to the embodiment among Fig. 5 two, multiplexer has remaining multiplexing port, then can directly use.
If there is not remaining multiplexing port, then need to reselect a sign multiplexer, the sign multiplexer is used for identifying whether begin new circulation.Be connected on the main control chip of control module.Referring to the embodiment among Fig. 4 one, need select sign multiplexer 14 for use, sign multiplexer 14 is connected on the main control chip of control module, two other signal input part of main control chip is connected with Enable Pin with the output channel of a sign multiplexer 14, among the embodiment one, select for use a slice 2 to select 1 multiplexer MAX4780 promptly can satisfy system requirements.MAX4780 contains four 2 and selects 1 module, and TTL/CMOS level compatibility, operating voltage range be+and 1.6V is to+4.2V.2 select the particulars of 1 multiplexer can be about this with reference to the official website " www.maxim-ic.com.cn " of MAXIM.
The main control chip of control module can be DSP, ARM, CPLD/FPGA and common single-chip microcomputer.In order to improve system speed, generally do not use common single-chip microcomputer.The TMS320F2812 of TI company is selected in this enforcement, the external crystal-controlled oscillation 30M of this chip, and system's dominant frequency can reach 150M after 5 frequencys multiplication.
In the present embodiment, the signal input part of A/D converting unit is connected with the COM1 end of top plate multiplexer 13, and the signal output part of A/D converting unit is connected with the USB unit.A/D converting unit and USB collection of units are synthesized a capture card.The A/D converting unit can be selected the high-speed a/d conversion chip for use, such as the MAX1336 of MAXIM company.The USB unit can be selected the Cy7c68001 of Cypress company for use, also can select the USB20C of western ADT electronics Ltd for use.In addition, the USB capture card of forming technique is arranged on the market, can realize A/D conversion and two functions of usb communication among the last figure.The UA307A capture card of Beijing excellent reconnaissance control techniques company limited (http://www.chuandong.com/product) has been selected in this enforcement, and this capture card resolution is 16, and the highest sample frequency is 500KHz.UA307A can realize outer trigger action sampling, and each passage quick sampling of each outer pulse is once controlled by main control chip conveniently.Particulars about this capture card can be with reference to company's site " www.addatech.net ".
Fig. 6 is the program flow diagram of control module main control chip.The control module main control chip is system initialization at first, selects 1 multiplexer yet control 2, produces the sign level.In the present embodiment, the sign level is 0101, and concrete production process can be with reference to the explanation to Fig. 5.The sign level shows and restarts to scan whole pressure data Acquisition Circuit.
Initialization sensing point i=0.Control lower plywood multiplexer 12 and top plate multiplexer 13 are selected specific row and column, and then are selected i sensing point (control timing is seen Fig. 5).Start the A/D conversion.I=i+1 is if i, continues control lower plywood multiplexer 12 not to 16 and top plate multiplexer 13 is selected i sensing point.If i has been 16, show that a scan full hard disk finishes, restart to scan since the 0th sensing point.Present embodiment is 4 * 4 array, and each circulation all produces 0101 flag, and to take resource relatively more, can only produce a flag in the time of initialization and get final product.For the large tracts of land array, each circulation produces a flag, helps accurate location, makes measurement result accurately reliable more.
Fig. 7 is the sequential chart of multiplexer in the control module main control chip, is used to select i sensing point.Present embodiment is an example with 4 * 4 arrays, explains this sequential chart in conjunction with Fig. 3 and Fig. 6.
In the I workspace, EN and IO are used for controlling 2 and select 1 multiplexer, produce the sign level.As shown in Figure 3, this multiplexer CO connects VCC, and C1 connects GND, therefore, the sequential of corresponding diagram 6, the sign level of generation is 0101.Low level is ground, and high level is near supply voltage.For present embodiment, real plantar pressure can not produce 0101 signal, so only just can become an effective id signal with 4 level.Id signal can effectively be determined the starting point of measurement, thereby data and actual spot of measurement are mapped.Even the situations such as outage, the accidental operation irregularity of USB that produce in the use cause sampled data to be damaged, the next frame data also can reliably be guaranteed.Detect id signal before each circulation, can guarantee the validity of data.In order to produce flag, the remaining multiplexing port of general using multiplexer.If there is not remaining multiplexing port, then need to select for use another sheet multiplexer.
After producing the sign level, program enters the II workspace.Program at first enables lower plywood multiplexer 12 and top plate multiplexer 13, IO1 and IO0 with top plate multiplexer 13 puts high level then, this moment, top plate was selected first row S1-S4, and the level of controlling the IO1 of lower plywood multiplexer 12 and IO0 respectively is 00,01,10 and 11 to select S1-S4 sensing point respectively.
The rest may be inferred, and program enters III, IV and V workspace respectively, selects S1-S16 sensing point one by one.
Fig. 8 is the upper-computer processing software program flow diagram.Host computer at first carries out system and hardware initialization, and this enforcement mainly is initialization UA307A capture card, sets sampling channel and sampling rate.Yet reading of data from capture card is analyzed the position that obtains identifying level, and then the reference position of definite pressure data, obtains valid data.The program that the program utilization is demarcated is in advance calculated sensing point pressure size.Then data are analyzed, comprised functions such as drawing, diagnosis.
Fig. 9-13 is shown is the structural drawing of right foot pad, structural drawing of its left side foot pad in contrast, its structure is identical with title.Localization package foot sheet 1 has a vola pad part 2, the upper surface of vola pad part 2 flexible protruding 8, one side of vola pad part 2 is extended sufficient face cover part 3, be connected with a secondary vola side hasp 5 on the lateral edges of foot face cover part 3 and the edge of vola pad part 2, the rear portion of foot face cover part 3 is extended heel and is surrounded part 4, and heel surrounds the edge of part 4 and the back edge of sufficient face cover part 3 is connected with a secondary heel portion fixed agraffe 7.Localization package foot sheet 1 is the hollow elasticity body, is filled with fluid 11 in its internal cavities.Described hollow elasticity body can adopt elastic polyurethane or natural emulsion.
The using method of the harvester of plantar pressure distribution signal acquisition system:
1, membrane type pressure sensing measuring appliance 9 is placed pad part 2 positions, vola, and will foot 10 flat stepping on.
2, lid is enclosed along sufficient face in sufficient face cover part 3, and with vola side hasp 5 fastenings.
3, heel is surrounded part 4 and enclose forward tightly along heel, and with 7 fastenings of heel portion fixed agraffe.
4, begin to carry out sufficient pressure initialization survey and confirm id signal after carry out sufficient pressure survey.
Claims (9)
- [claim 1] a kind of plantar pressure distribution signal acquisition system, but the sensing unit that comprises a perception ambient pressure, one can convert the ambient pressure of sensing unit perception to the A/D converting unit of pressure signal, one can select the sensing point of sensing unit to carry out the control module of voltage transitions, one pressure signal that control module can be obtained sends the USB unit of host computer to, it is characterized in that:Described sensing unit is fixing by localization package foot sheet (1) and foot (10), sensing unit is the membrane type pressure sensing measuring appliance (9) that comprises top plate (9.1) and lower plywood (9.2), top plate (9.1) and lower plywood (9.2) wherein the one side on all be intervally distributed with parallel deposited copper (9.3), apply on the copper (9.3) and be intervally distributed with conductive rubber (9.4), conductive rubber on the top plate (9.1) contacts with conductive rubber on the lower plywood (9.2) and is in the same place, become sensing point, and the deposited copper on the top plate intersects in opposite directions with deposited copper on the lower plywood; Deposited copper on the described top plate (9.1) is connected with the passage input end of a top plate multiplexer (13), and the deposited copper on the described lower plywood (9.2) is connected with the passage input end of lower plywood multiplexer (12);Described control module is a main control chip, a signal input part of main control chip is connected with Enable Pin with two signal output parts of top plate multiplexer, another signal input part of main control chip is connected with Enable Pin with two signal output parts of lower plywood multiplexer, the COM1 end of top plate multiplexer (13) is connected with the signal input part of A/D converting unit, above-mentioned COM1 end also is connected with the voltage stabilizing chip through a precision resistance, the COM2 end ground connection of described lower plywood multiplexer.The signal input part of A/D converting unit is connected with the COM1 end of top plate multiplexer (13), and the signal output part of A/D converting unit is connected with the USB unit.
- [claim 2] plantar pressure distribution signal acquisition system according to claim 1 is characterized in that: two other signal input part of described main control chip is connected with Enable Pin with the output channel of a sign multiplexer (14).
- [claim 3] plantar pressure distribution signal acquisition system according to claim 1 is characterized in that: described top plate (9.1) is flexible pcb board with lower plywood (9.2).
- [claim 4] plantar pressure distribution signal acquisition system according to claim 1 is characterized in that: described A/D converting unit and USB collection of units are synthesized a capture card.
- [claim 5] according to claim 1 or 2 or 3 or 4 described plantar pressure distribution signal acquisition systems, it is characterized in that: the conductive rubber diameter on the described sensing unit is not less than 4mm, and the distance between the sensing point is for being not less than 5mm.
- [claim 6] plantar pressure distribution signal acquisition system according to claim 5 is characterized in that: the sensing point in the described sensing unit is for equidistantly distributing or the unequal-interval distribution.
- [claim 7] plantar pressure distribution signal acquisition system according to claim 6 is characterized in that: the quantity of described sensing point is 4 * 4 or 4 * 4 multiple.
- [claim 8] plantar pressure distribution signal acquisition system according to claim 6, it is characterized in that: localization package foot sheet (1) has a vola pad part (2), the flexible projection of upper surface (8) of vola pad part (2), one side of vola pad part (2) is extended sufficient face cover part (3), be connected with a secondary vola side hasp (5) on the edge of the lateral edges of foot face cover part (3) and vola pad part (2), the rear portion of foot face cover part (3) is extended heel and is surrounded part (4), and heel surrounds the edge of part (4) and the back edge of sufficient face cover part (3) is connected with a secondary heel portion fixed agraffe (7).
- [claim 9] plantar pressure distribution signal acquisition system according to claim 8 is characterized in that: described localization package foot sheet (1) is the hollow elasticity body, is filled with fluid (11) in its internal cavities.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009103012974A CN101520355B (en) | 2009-04-02 | 2009-04-02 | Plantar pressure distribution signal acquisition system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009103012974A CN101520355B (en) | 2009-04-02 | 2009-04-02 | Plantar pressure distribution signal acquisition system |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101520355A true CN101520355A (en) | 2009-09-02 |
| CN101520355B CN101520355B (en) | 2011-05-18 |
Family
ID=41081066
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2009103012974A Active CN101520355B (en) | 2009-04-02 | 2009-04-02 | Plantar pressure distribution signal acquisition system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN101520355B (en) |
Cited By (21)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101843497A (en) * | 2010-04-08 | 2010-09-29 | 中国科学院合肥物质科学研究院 | System for collecting and processing information of plantar pressure distribution of wearable power-assisting robot |
| CN101912271A (en) * | 2010-07-19 | 2010-12-15 | 中国科学院深圳先进技术研究院 | System and method for displaying plantar pressure in real time |
| CN102657535A (en) * | 2012-05-23 | 2012-09-12 | 西安交通大学 | Flexible sole force measuring system |
| CN102670207A (en) * | 2012-05-15 | 2012-09-19 | 北京大学 | Gait analysis method based on plantar pressure |
| CN102715892A (en) * | 2012-06-05 | 2012-10-10 | 中国科学院合肥物质科学研究院 | Integral determination system for traditional Chinese manipulation and flexible three-dimensional mechanical quantity determination pad |
| CN102908156A (en) * | 2012-09-25 | 2013-02-06 | 郑蕾娜 | Multi-information fusion intelligent health foot pressure analysis system based on internet of things and cloud computation |
| CN103048068A (en) * | 2013-01-15 | 2013-04-17 | 中国人民解放军总后勤部军需装备研究所 | Flexible sensing device for measuring head pressure and manufacture method thereof |
| CN103063347A (en) * | 2012-12-30 | 2013-04-24 | 韩雪峰 | Flexible pressure measuring and locating analyzer |
| CN105092114A (en) * | 2015-04-28 | 2015-11-25 | 深圳市豪恩声学股份有限公司 | Pressure sensor, intelligent shoe pad, intelligent shoe, and manufacturing method of pressure sensor |
| CN105310654A (en) * | 2015-08-06 | 2016-02-10 | 跑动（厦门）信息科技有限公司 | Foot pronation detection method and smart shoe pad for detecting pronation |
| CN105380602A (en) * | 2015-11-13 | 2016-03-09 | 汪毅 | Wearable human achilles tendon information collection and monitoring system |
| CN103610446B (en) * | 2013-11-28 | 2017-05-31 | 中山大学 | A kind of foot movement condition detection apparatus |
| CN108703756A (en) * | 2018-08-02 | 2018-10-26 | 贵州大学 | A kind of Footscan |
| CN108731853A (en) * | 2018-03-16 | 2018-11-02 | 东南大学 | Pressure distribution measurement analysis system based on flexible material and method |
| CN109100060A (en) * | 2018-08-02 | 2018-12-28 | 贵州大学 | A kind of infant creeping pad pressure testing system |
| CN109100059A (en) * | 2018-08-02 | 2018-12-28 | 贵州大学 | A kind of pliable pressure sensor for diabetic's sole pressure test |
| CN109141690A (en) * | 2018-08-02 | 2019-01-04 | 贵州大学 | A kind of pliable pressure sensor for infant creeping pad |
| CN109186837A (en) * | 2018-10-16 | 2019-01-11 | 西北工业大学 | Buttocks presses force volume imaging system |
| CN111811722A (en) * | 2020-07-10 | 2020-10-23 | 北京交通大学 | Motor vertical load testing structure and method for rib plate type motor suspension force measuring framework |
| CN112729624A (en) * | 2020-12-04 | 2021-04-30 | 厦门大学 | Array LC pressure sensor integrated device |
| CN113647937A (en) * | 2021-08-16 | 2021-11-16 | 宁波荣勃通机电科技有限公司 | Detection device, detection method, insole, training method and identification method |
-
2009
- 2009-04-02 CN CN2009103012974A patent/CN101520355B/en active Active
Cited By (26)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101843497B (en) * | 2010-04-08 | 2011-11-30 | 中国科学院合肥物质科学研究院 | System for collecting and processing information of plantar pressure distribution of wearable power-assisting robot |
| CN101843497A (en) * | 2010-04-08 | 2010-09-29 | 中国科学院合肥物质科学研究院 | System for collecting and processing information of plantar pressure distribution of wearable power-assisting robot |
| CN101912271A (en) * | 2010-07-19 | 2010-12-15 | 中国科学院深圳先进技术研究院 | System and method for displaying plantar pressure in real time |
| CN102670207A (en) * | 2012-05-15 | 2012-09-19 | 北京大学 | Gait analysis method based on plantar pressure |
| CN102657535B (en) * | 2012-05-23 | 2013-10-16 | 西安交通大学 | Flexible sole force measuring system |
| CN102657535A (en) * | 2012-05-23 | 2012-09-12 | 西安交通大学 | Flexible sole force measuring system |
| CN102715892A (en) * | 2012-06-05 | 2012-10-10 | 中国科学院合肥物质科学研究院 | Integral determination system for traditional Chinese manipulation and flexible three-dimensional mechanical quantity determination pad |
| CN102908156A (en) * | 2012-09-25 | 2013-02-06 | 郑蕾娜 | Multi-information fusion intelligent health foot pressure analysis system based on internet of things and cloud computation |
| CN103063347A (en) * | 2012-12-30 | 2013-04-24 | 韩雪峰 | Flexible pressure measuring and locating analyzer |
| CN103063347B (en) * | 2012-12-30 | 2014-12-03 | 韩雪峰 | Flexible pressure measuring and locating analyzer |
| CN103048068A (en) * | 2013-01-15 | 2013-04-17 | 中国人民解放军总后勤部军需装备研究所 | Flexible sensing device for measuring head pressure and manufacture method thereof |
| CN103048068B (en) * | 2013-01-15 | 2015-05-13 | 中国人民解放军总后勤部军需装备研究所 | Flexible sensing device for measuring head pressure and manufacture method thereof |
| CN103610446B (en) * | 2013-11-28 | 2017-05-31 | 中山大学 | A kind of foot movement condition detection apparatus |
| CN105092114A (en) * | 2015-04-28 | 2015-11-25 | 深圳市豪恩声学股份有限公司 | Pressure sensor, intelligent shoe pad, intelligent shoe, and manufacturing method of pressure sensor |
| CN105310654A (en) * | 2015-08-06 | 2016-02-10 | 跑动（厦门）信息科技有限公司 | Foot pronation detection method and smart shoe pad for detecting pronation |
| CN105380602A (en) * | 2015-11-13 | 2016-03-09 | 汪毅 | Wearable human achilles tendon information collection and monitoring system |
| CN108731853A (en) * | 2018-03-16 | 2018-11-02 | 东南大学 | Pressure distribution measurement analysis system based on flexible material and method |
| CN108703756A (en) * | 2018-08-02 | 2018-10-26 | 贵州大学 | A kind of Footscan |
| CN109100060A (en) * | 2018-08-02 | 2018-12-28 | 贵州大学 | A kind of infant creeping pad pressure testing system |
| CN109100059A (en) * | 2018-08-02 | 2018-12-28 | 贵州大学 | A kind of pliable pressure sensor for diabetic's sole pressure test |
| CN109141690A (en) * | 2018-08-02 | 2019-01-04 | 贵州大学 | A kind of pliable pressure sensor for infant creeping pad |
| CN109186837A (en) * | 2018-10-16 | 2019-01-11 | 西北工业大学 | Buttocks presses force volume imaging system |
| CN111811722A (en) * | 2020-07-10 | 2020-10-23 | 北京交通大学 | Motor vertical load testing structure and method for rib plate type motor suspension force measuring framework |
| CN112729624A (en) * | 2020-12-04 | 2021-04-30 | 厦门大学 | Array LC pressure sensor integrated device |
| CN112729624B (en) * | 2020-12-04 | 2021-10-15 | 厦门大学 | Array LC pressure sensor integrated device |
| CN113647937A (en) * | 2021-08-16 | 2021-11-16 | 宁波荣勃通机电科技有限公司 | Detection device, detection method, insole, training method and identification method |
Also Published As
| Publication number | Publication date |
|---|---|
| CN101520355B (en) | 2011-05-18 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN101520355B (en) | Plantar pressure distribution signal acquisition system | |
| CN201382838Y (en) | Large-area pressure distribution signal acquisition system | |
| CN101828794B (en) | Dynamic sole pressure test insole with multilayer sensing core structure | |
| CN103142236B (en) | Intelligent shoe pad and method for determining walking gait | |
| CN105266257A (en) | Intelligent shoe based on whole-foot pressure information acquiring | |
| CN107157485A (en) | A kind of intellectual monitoring shoe-pad and its intelligent monitor system | |
| CN103610446B (en) | A kind of foot movement condition detection apparatus | |
| CN105748078A (en) | Sole pressure measuring device based on pressure sensing insole and system | |
| CN205250477U (en) | Intelligence shoes based on press force information to acquire enough entirely | |
| US20140081160A1 (en) | Flexible Multi-point Pulse Sensor | |
| CN108042138A (en) | Intelligent wireless plantar pressure monitors insole and its application method | |
| CN106768508A (en) | A kind of gel capacitance type sensor and method for measuring plantar pressure and dynamic change | |
| CN201710368U (en) | Plantar pressure measuring device | |
| CN103622709A (en) | Insole type walking input sensing device | |
| CN201379559Y (en) | Foot pressure distribution signal acquisition system | |
| CN201700509U (en) | Dynamic pelma pressure test insole with multi-layer sensing core structure | |
| CN105581803A (en) | Piezoresistive plantar pressure sensor arranged in shoe | |
| CN101843497B (en) | System for collecting and processing information of plantar pressure distribution of wearable power-assisting robot | |
| CN202408922U (en) | Foot arch measuring instrument | |
| CN101147677A (en) | Abdominal impedance based body composition meter | |
| CN202589508U (en) | Flexible multi-point capacitance-type pulse detection device | |
| CN203169148U (en) | Novel fat scale | |
| CN107898464B (en) | System and method for measuring plantar pressure distribution | |
| CN113303544B (en) | Special testing device for deviation of actual measurement data and theoretical data of insole stress sensor | |
| CN2721009Y (en) | Measuring device for realizing foot sole pressure with thumb exstrophy |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| ASS | Succession or assignment of patent right |
Owner name: LONGHAO TIANDI CO., LTD. Free format text: FORMER OWNER: ZHANG SHUO Effective date: 20130415 |
|
| C41 | Transfer of patent application or patent right or utility model | ||
| COR | Change of bibliographic data |
Free format text: CORRECT: ADDRESS; FROM: 100039 HAIDIAN, BEIJING TO: 518010 SHENZHEN, GUANGDONG PROVINCE |
|
| TR01 | Transfer of patent right |
Effective date of registration: 20130415 Address after: 7, building 2018, Shen Hua commercial building, No. 518010, guest Road, Shenzhen, Guangdong, Luohu District Patentee after: Longhao Tiandi Corporation Limited Address before: 100039 Beijing city Haidian District West Fourth Ring Road No. 39, 10000 to Mingyuan 2-401 Patentee before: Zhang Shuo |
|
| C56 | Change in the name or address of the patentee |
Owner name: SHENZHEN LONGHAO TIANDI CO., LTD. Free format text: FORMER NAME: LONGHAO TIANDI CO., LTD. |
|
| CP03 | Change of name, title or address |
Address after: Luohu District road Shenzhen city Guangdong province 518010 No. 2018 road and South Road Interchange on the north side of deep China commercial building seventh floor podium Patentee after: LONGHAO TIANDI CORPORATION LIMITED Address before: 7, building 2018, Shen Hua commercial building, No. 518010, guest Road, Shenzhen, Guangdong, Luohu District Patentee before: Longhao Tiandi Corporation Limited |
|
| C41 | Transfer of patent application or patent right or utility model | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20161216 Address after: 518109 Guangdong Province, Shenzhen New District of Longhua City, Dalang street, Huaning Road No. 99 Patentee after: Xinbaili Shoe (Shenzhen) Co.Ltd Address before: Luohu District road Shenzhen city Guangdong province 518010 No. 2018 road and South Road Interchange on the north side of deep China commercial building seventh floor podium Patentee before: LONGHAO TIANDI CORPORATION LIMITED |
|
| TR01 | Transfer of patent right |
Effective date of registration: 20211220 Address after: 518109 Room 501, building 1, xinbaili Industrial Park, Xinshi community, Dalang street, Longhua District, Shenzhen, Guangdong Province Patentee after: Lirong shoes (Shenzhen) Co.,Ltd. Address before: No. 99, Huaning West Road, Dalang street, Longhua New District, Shenzhen, Guangdong 518109 Patentee before: BELLE SHOES (SHENZHEN) CO.,LTD. |
|
| TR01 | Transfer of patent right |