CN114488896A - High-precision sole pressure image acquisition device - Google Patents
High-precision sole pressure image acquisition device Download PDFInfo
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Abstract
The embodiment of the invention discloses a high-precision sole pressure image acquisition device which comprises a machine body, wherein the machine body comprises a circuit main board and at least one footprint acquisition unit, the footprint acquisition unit comprises a sole acquisition platform for sole treading, the sole acquisition platform comprises a pressure sensing module consisting of a plurality of flexible pressure film sensors in array distributed point array arrangement, and sole pressure information acquired by the pressure sensing module is transmitted to the circuit main board. The invention is a modularized splicing structure, a long footpath, such as a 10-meter step footpath, can be spliced by single machine, and the splicing design can not only ensure that the equipment laying is not limited by the field, but also ensure the real and stable collected plantar pressure data. The sensors are arranged in a matrix form, and the density reaches 25 points/cm2The area of the web reaches 50 x 30 cm, and a fine sole pressure image or pressure detail generated by sole patterns can be identified.
Description
Technical Field
The invention relates to the technical field of data acquisition and processing, in particular to a high-precision plantar pressure image acquisition device.
Background
The distribution of plantar pressure reflects the structure, function, and overall body posture control of the foot. There are studies that indicate that age is an important factor affecting plantar pressure. With age, the maximum peak pressure of the sole, the pressure experienced by the heel and forefoot, gradually decreases, while the pressure experienced by the arch increases; in addition, it has been found that the total contact time of the sole and the contact time of key parts are prolonged with age. Meanwhile, the body weight and the musculoskeletal system of the male and the female are different, particularly the longitudinal arch of the foot is different in biomechanics, the gender also has obvious influence on the pressure of the sole of the foot, and basic identification and determination can be carried out on an acquisition object through analysis of the stride, the step width, the step and the pressure of the sole of the foot. Some existing sole collection devices have many defects, such as:
first, the current devices are not accurate and the resolution is 4 dots/cm2(resolution 5mm x 5mm), the pressure image acquired by the collector under the resolution is analyzed, and the acquired information is deficient, so that the pressure distribution and the characteristics of key details cannot be well reflected.
Secondly, the existing equipment is not long enough in acquisition length, the general length is limited within 2 meters, only two to three serial footprints are allowed to be acquired, and the plantar pressure in a stable normal walking posture is difficult to acquire. The acquired image data is unstable due to the fact that the acquired person is prone to walking unnaturally, and further research cannot be continued;
thirdly, the existing device has a low acquisition frame rate, and a single chip microcomputer is used as a main controller in general products, so that the technical characteristics of the device can only meet the sole pressure acquisition in a static standing state, and the requirements of high frame rate acquisition in walking and moving states are difficult to meet.
Fourthly, the pressure sensor manufactured by the existing process has large crosstalk and serious data interference; mainly, besides the resistance characteristic, a small parasitic capacitance exists, and the interference caused by the charging and discharging of the capacitance exists on a channel;
fifth, most of the existing devices adopt a serial communication technical scheme, so that the data transmission efficiency is low, and the existing devices are not suitable for large data volume and quick transmission;
disclosure of Invention
The invention aims to overcome the defects and provides a high-precision plantar pressure image acquisition device.
In order to achieve the purpose, the invention adopts the following technical scheme:
the utility model provides a high accuracy plantar pressure image acquisition device, includes the organism, the organism includes circuit mainboard and at least one footprint acquisition unit, the footprint acquisition unit is including supplying the sole to step on the plantar acquisition platform of pressing, plantar acquisition platform includes the forced induction module that comprises the pressure sensor who arranges by a plurality of point arrays, the plantar pressure information that forced induction module acquireed is carried extremely circuit mainboard.
The pressure sensing module is composed of a plurality of pressure sensors arranged in a point array mode, and can identify fine sole pressure images or pressure details generated by sole patterns. In addition, the number of the footprint acquisition units can be set according to actual needs, for example, one footprint acquisition unit can be set and can be used for acquiring single footprint information, a plurality of footprint acquisition units can also be set, the sole pressure information sensed by the pressure sensing module is transmitted to the circuit mainboard and processed by the circuit mainboard, and the circuit mainboard can adopt a high-end FPGA programmable logic device to enable the data acquisition frequency to reach over 100HZ and meet the requirement of high-frame-rate data acquisition and processing required by human body movement.
Preferably, the pressure sensor is a high-precision resistance type pressure sensor; the method comprises the following steps that sensing points are distributed every 2mm, wherein the line width is 1.2mm, the line spacing is 2mm, and the line spacing is 0.8 mm; the pressure sensing module is a point array of 37500 pressure sensors consisting of 150 rows and 250 columns. The line width is 1.2mm, the line spacing is 2mm, and the line gap is 0.8mm, which means that the width of the pressure sensor is 1.2mm, the center distance between the adjacent pressure sensors is 2mm, and the gap between the adjacent pressure sensors is 0.8 mm.
The pressure sensor is made of nano force-sensitive and silver paste materials, for example, a high-precision resistance type pressure sensor is utilized, and the acquisition density is 25 points/cm2(resolution 2mm), the problems of unobvious pressure characteristic region and low resolution are solved;
the pressure sensing module comprises 37500 sensing point arrays consisting of 150 rows and 250 columns, the collecting breadth reaches 300 x 500mm, and the width of the pressure sensing module is 50cm, so that the step width requirement under the normal motion state is met.
Preferably, the pressure sensing module is divided into a plurality of pressure sensing units, the body includes a plurality of analog-to-digital converters corresponding to the pressure sensing units one to one, and the circuit board switches and acquires plantar pressure information of different pressure sensing units through an all-in-one analog switch circuit.
In the invention, the partition control is carried out on the row and column channels on the sensor, and the channel data is received by a plurality of analog-to-digital converters at the same time, for example, the data of 20 channels can be received at the same time; in addition, the circuit main board selects different row and column channels through the all-in-one analog switch circuit, the design can reduce the crosstalk on the channels to the maximum extent, and can also improve the switching rate of the analog switch circuit so as to improve the acquisition rate, and the circuit main board has the characteristics of low crosstalk and low time delay,
preferably, the circuit main board adopts an FPGA programmable logic device as a main controller, and controls a plurality of analog-to-digital converters to work simultaneously in parallel.
The circuit main board adopts a high-end FPGA programmable logic device, controls a plurality of analog-to-digital converters to work simultaneously through abundant IO resources in parallel, can enable the data acquisition frequency to reach more than 100HZ, meets the high frame rate data acquisition processing required by human body movement, and has the characteristic of acquiring a high frame rate.
Preferably, the upper computer presets acquisition frequency parameters, and the machine body further comprises a synchronous trigger which generates and sends trigger signal pulses according to the acquisition frequency parameters preset by the upper computer so as to trigger the acquisition of plantar pressure information and achieve the purpose of data synchronization.
The invention is provided with a synchronous trigger controller, acquisition frequency parameters can be set through upper computer operating software, the synchronous trigger generates and sends trigger signal pulses according to the frequency parameters, and a device in the system starts to acquire after acquiring the trigger signal pulses, thereby achieving the purpose of data synchronization.
Preferably, the device also comprises a power supply device which can supply power for one or more machine bodies, and the plurality of machine bodies are powered on in a time-sharing manner and output in a constant voltage manner.
The invention is also provided with power supply equipment which can support the power supply of at most 34 acquisition devices and automatically control the power-on time interval and the starting sequence of the devices through an intelligent control system; the computer can also be operated to send instructions to control the on and off of a single power supply, a plurality of power supplies or all the power supplies.
Preferably, the sole collection platform further comprises a bearing plate and a collection protection film which protects the pressure sensing module and is in contact with the sole.
Preferably, the multifunctional collecting and protecting device further comprises power supply equipment for supplying electric energy to the machine body, a synchronous trigger and a USB port, and the collecting and protecting film is made of TPU, leather or high-mesh umbrella cloth.
The material and the structural form of the collecting protective film can be various, and the existing various materials can be adopted.
Preferably, the footprint acquisition units are multiple, and the multiple footprint acquisition units are spliced to form a sole acquisition footpath for the person to be acquired to walk. The invention adopts a modularized splicing structure, can be used for single acquisition to research a single footprint, can also be spliced into a plurality of acquisition footpaths with the maximum length of 10 meters, and builds a data acquisition platform for serial footprint research under different motion postures.
In summary, the invention adopts the synchronous trigger to send the trigger signal to the equipment in the system to synchronize the data between the equipment, the acquisition frequency parameter can be set through the upper computer, the synchronous trigger generates and sends the trigger signal pulse according to the frequency parameter, and the equipment in the system starts to acquire after acquiring the trigger signal pulse, thereby achieving the purpose of data synchronization.
The USB link is provided with too many devices, and simultaneously, the USB port is started to cause a surge phenomenon, so that the device drive cannot be correctly identified, therefore, the invention can adopt an independent time-sharing power-on power supply system, and can support the power supply of 34 devices at most; and a time-sharing control technology is adopted, so that the surge phenomenon on the USB port is avoided.
When the system is powered on in a time-sharing manner, the power-on time interval and the starting sequence of the equipment are automatically controlled; the power supply of a single channel, a plurality of channels or all the channels can be controlled to be switched on and off by operating the computer to send instructions.
The acquisition scheme of the invention has the characteristics of low crosstalk and low time delay;
preferably, the row and column channels on the sensor are partitioned, and the number of the partitions is consistent; the rows and the columns are divided into 10 areas, the interval between the row areas is 3cm, and the interval between the row areas is 5 cm; receiving data of 20 channels simultaneously through 20 analog-to-digital converters; in addition, the main controller selects different rows and columns of channels by controlling the all-in-one analog switch circuit, so that the design can reduce crosstalk among rows and columns to the maximum extent and can improve the switching rate of the analog switch circuit, thereby improving the acquisition rate;
the height of the machine body can be set according to actual needs, for example, the whole height can be controlled to be 4cm, a single machine can be spliced into a longest 10-meter step road through a splicing module, and the splicing design can not only prevent equipment from being limited by a field, but also ensure the real and stable acquired plantar pressure data.
Preferably, the machine body is also provided with a starting sign board for indicating the person to be collected to enter the sole collecting footpath. The starting sign board can be used as an waiting area and an ending area before the collection personnel enters the sole collection footpath.
Compared with the prior art, the invention has the beneficial effects that:
(1) the invention is a combined type splicing structure, a long footpath, such as a 10-meter step-by-step footpath, can be spliced by single platform, and the splicing design can not only ensure that the equipment laying is not limited by the field, but also ensure the real and stable collected plantar pressure data.
(2) The sensor has the characteristic of high density, is arranged in a matrix form, and has the density of 25 points/cm2The area of the web reaches 50 x 30 cm, and a fine sole pressure image or pressure detail generated by sole patterns can be identified.
(3) According to the invention, single frame data and other information are compressed into a file according to a certain format, a single frame image is generated only by decompressing the data by using special export software, a certain effect is achieved on data encryption, original gray data is rendered into a multi-color image by adopting a special algorithm, a repressing area for displaying plantar pressure more visually and vividly is formed, information such as time, frame rate and the like during acquisition is recorded during data storage, a video file can be manufactured according to the information after the acquisition is finished, and a plantar pressure area forming process is repeatedly played according to gait during the acquisition.
(4) The acquisition scheme of the invention has the characteristics of low crosstalk and low time delay;
dividing the row and column channels on the sensor into regions, wherein the number of the regions is consistent; the rows and the columns are divided into 10 areas, the interval between the row areas is 3cm, and the interval between the row areas is 5 cm; receiving data of 20 channels simultaneously through 20 analog-to-digital converters; in addition, the main controller selects different rows and columns of channels by controlling the all-in-one analog switch circuit, so that the design can reduce crosstalk among rows and columns to the maximum extent and can improve the switching rate of the analog switch circuit, thereby improving the acquisition rate;
(5) the invention has the characteristic of acquiring high frame rate, wherein the circuit mainboard adopts a high-end FPGA programmable logic device, and a plurality of analog-to-digital converters are used for simultaneously acquiring, so that the data acquisition frequency can reach more than 100HZ, and the high frame rate data acquisition processing required by human body movement is met.
The invention is further described below with reference to the accompanying drawings and specific embodiments.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed to be used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.
Fig. 1 is a schematic structural diagram of the present embodiment.
Fig. 2 is an enlarged schematic view of a portion a in fig. 1.
Fig. 3 is a schematic top view of the present embodiment.
Fig. 4 is a schematic view of an arrangement structure of the pressure sensing modules in this embodiment.
Reference numerals:
1. a floor mat; 2. an aluminum alloy decorative strip; 3. stainless steel decorative plates; 4. a starting sign board; 5. a side decorative panel; 6. a circuit main board; 7. a pressure sensor; 8. a circuit adapter plate; 9. a bearing plate; 11. USB-HUB; 12. a power supply device.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, not all, embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
It will be understood that the terms "comprises" and/or "comprising," when used in this specification and the appended claims, specify the presence of stated features, integers, steps, operations, elements, and/or components, but do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, and/or groups thereof.
It is also to be understood that the terminology used in the description of the invention herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used in the specification of the present invention and the appended claims, the singular forms "a," "an," and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise.
It should be further understood that the term "and/or" as used in this specification and the appended claims refers to and includes any and all possible combinations of one or more of the associated listed items.
Referring to fig. 1 to 3, the present embodiment is a high-precision sole pressure image collecting device, which includes a body, the body includes a circuit board 6 and at least one footprint collecting unit, the footprint collecting unit includes a sole collecting platform for being stepped on by a sole, the sole collecting platform includes a pressure sensing module composed of a plurality of pressure sensors 7 arranged in a dot array, and sole pressure information obtained by the pressure sensing module is transmitted to the circuit board 6.
The pressure sensing module in this embodiment is composed of a plurality of pressure sensors 7 arranged in a dot array, and can recognize fine sole pressure images or pressure details generated by sole patterns. In addition, in this embodiment, the number of the footprint acquisition units can be set according to actual needs, for example, one footprint acquisition unit can be set, the footprint acquisition unit can be used for acquiring single footprint information, and a plurality of footprint acquisition units can also be set, the plantar pressure information sensed by the pressure sensing module is transmitted to the circuit board 6 and processed by the circuit board 6, the circuit board 6 in this embodiment can adopt a high-end FPGA programmable logic device to enable the data acquisition frequency to reach more than 100HZ, and the requirement of high frame rate data acquisition and processing required by human body movement is met.
In one embodiment, the pressure sensor 7 is a high-precision resistive pressure sensor 7; the pressure sensing module is a spot array of 37500 pressure sensors 7 consisting of 150 rows and 250 columns.
In this embodiment, the pressure sensor 7 is made of nano force-sensitive silver paste material, for example, the high-precision resistance pressure sensor 7 is used, and the acquisition density is 25 points/cm2(the resolution is 2 mm-2 mm), the problems that the pressure characteristic area is not obvious and the resolution is not high are solved;
the pressure sensing module comprises 37500 sensing point arrays consisting of 150 rows and 250 columns, the collecting breadth reaches 300 x 500mm, and the width of the pressure sensing module is 50cm, so that the step width requirement under the normal motion state is met.
As shown in fig. 4, the pressure sensor in this embodiment is a high-precision resistive pressure sensor; the sensing points are distributed at intervals of 2mm, wherein the line width is 1.2mm, the line spacing is 2mm, and the line spacing is 0.8 mm; the line width is 1.2mm, the line spacing is 2mm, and the line gap is 0.8mm, which respectively means that the width of the pressure sensor is 1.2mm, the center distance between the adjacent pressure sensors is 2mm, and the gap between the adjacent pressure sensors is 0.8 mm.
In an embodiment, the pressure sensing module is divided into a plurality of pressure sensing units, the body includes a plurality of analog-to-digital converters corresponding to the pressure sensing units one to one, and the circuit board switches to obtain plantar pressure information of different pressure sensing units through an all-in-one analog switch circuit.
In this embodiment, partition control is performed on row and column channels on the sensor, and a plurality of analog-to-digital converters receive channel data at the same time, for example, data of 20 channels can be received at the same time; in addition, the circuit main board selects different row and column channels through the all-in-one analog switch circuit, the design can reduce the crosstalk on the channels to the maximum extent, and can also improve the switching rate of the analog switch circuit so as to improve the acquisition rate, and the circuit main board has the characteristics of low crosstalk and low time delay,
in one embodiment, the circuit main board adopts an FPGA programmable logic device as a main controller, and controls a plurality of analog-to-digital converters to work simultaneously in parallel.
In the embodiment, the circuit main board adopts a high-end FPGA programmable logic device, and controls a plurality of analog-to-digital converters to work simultaneously through abundant IO resources in parallel, so that the data acquisition frequency can reach more than 100HZ, the high frame rate data acquisition processing required by human body movement is met, and the high frame rate acquisition device has the characteristic of acquiring a high frame rate.
In one embodiment, the upper computer presets acquisition frequency parameters, and the machine body further comprises a synchronous trigger, wherein the synchronous trigger generates and sends trigger signal pulses according to the acquisition frequency parameters preset by the upper computer to trigger the acquisition of plantar pressure information, and achieve the purpose of data synchronization.
In the embodiment, a synchronous trigger controller is arranged, acquisition frequency parameters can be set through upper computer operating software, the synchronous trigger generates and sends trigger signal pulses according to the frequency parameters, and a device in the system starts to acquire the trigger signal pulses to achieve the purpose of data synchronization.
In one embodiment, the device further comprises a power supply device which can provide power for one or more machine bodies, and the plurality of machine bodies are powered on in a time-sharing manner and output at constant voltage.
The power supply equipment is also arranged in the embodiment, the power supply of 34 acquisition devices can be supported at most, and the power-on time interval and the starting sequence of the devices are automatically controlled through an intelligent control system; the computer can also be operated to send instructions to control the on and off of a single power supply, a plurality of power supplies or all the power supplies.
In one embodiment, the sole collection platform further includes a bearing plate 9 and a collection protection film for protecting the pressure sensing module and contacting with the sole.
In one embodiment, the device further comprises a power supply device 12 for supplying electric energy to the body, a synchronous trigger and a USB port, and the collecting protective film is made of TPU, leather or high-mesh umbrella cloth.
The material and the structural style of gathering the protection film in this embodiment can have the multiple, can adopt current multiple material.
In summary, in this embodiment, a synchronous trigger is used to send a trigger signal to devices in the system to synchronize data between the devices, an acquisition frequency parameter can be set by the upper computer, the synchronous trigger generates and sends a trigger signal pulse according to the frequency parameter, and the devices in the system start to acquire after acquiring the trigger signal pulse, so as to achieve the purpose of data synchronization.
Since too many devices are mounted on the USB link and the USB port is powered on, the device driver cannot be correctly identified, and therefore, in this embodiment, an independent time-sharing power-on power supply system can be used to support power supply of 34 devices at most; and a time-sharing control technology is adopted, so that the surge phenomenon on the USB port is avoided.
In the embodiment, when the system is powered on in a time-sharing manner, the power-on time interval and the starting sequence of the equipment are automatically controlled; the power supply of a single channel, a plurality of channels or all the channels can be controlled to be switched on and off by operating the computer to send instructions.
In addition, in an embodiment, the footprint acquisition units can be a plurality of footprint acquisition units, and the plurality of footprint acquisition units are spliced to form a sole acquisition footpath for the person to be acquired to walk. The embodiment adopts a modularized splicing structure, can be used for single acquisition to research a single footprint, can also be spliced into a plurality of acquisition footpaths with the longest length of 10 meters, and builds a data acquisition platform for the research of serial footprints under different motion postures.
The shape and the height of the organism of this embodiment can set up according to actual need, and whole height is steerable in 4cm in this embodiment for example, through the concatenation module, can splice the one-tenth footpath for longest 10 meters, and the design that can splice can make equipment lay not restricted by the place but also guaranteed the plantar pressure data of collection truly stable. In this embodiment, structures such as the ground mat 1, the aluminum alloy decorative strip 2, the stainless steel decorative plate 3, and the side decorative plate 5 can be further arranged as required.
In one embodiment, the body also has a start marker plate for indicating the entry of the person to be collected into the sole collection footpath.
The embodiment provides a high-precision sole pressure image acquisition method, which comprises the following steps:
acquiring plantar pressure data information;
processing and converting plantar pressure data information into a gray-scale image, calculating effective collection points of each frame of gray-scale image, and storing the gray-scale image when the effective collection points are larger than a mining threshold CountCaptureSec;
converting the stored gray-scale image into JPEG (joint photographic experts group) for compression, and encrypting and storing the compressed image data and corresponding parameter information into a ch file;
and generating a final effect image synthesized by all the single-frame gray image images stored in the ch file into a gray image in a BMP format, and rendering the gray image into a color effect image capable of visually displaying the pressure change of each area.
While the invention has been described with reference to specific embodiments, the invention is not limited thereto, and various equivalent modifications and substitutions can be easily made by those skilled in the art within the technical scope of the invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.
Claims (10)
1. The utility model provides a high accuracy sole pressure image acquisition device, includes the organism, its characterized in that, the organism includes circuit mainboard and at least one footprint acquisition unit, the footprint acquisition unit is including supplying the sole to step on the pressure's sole acquisition platform, sole acquisition platform includes the forced induction module that comprises the pressure sensor that a plurality of array arranged, the sole pressure information that forced induction module acquireed is carried extremely circuit mainboard.
2. The device for acquiring the pressure image of the sole of the foot according to claim 1, wherein the pressure sensor is a high-precision resistance type pressure sensor, the pressure sensing module is a point array consisting of 37500 pressure sensors and 150 rows and 250 columns, and the density is 25 points/cm2The array is distributed with one pressure sensor every 2mm, the center distance between adjacent pressure sensors is 2mm, the width of each pressure sensor is 1.2mm, and the gap between adjacent pressure sensors is 0.8 mm; .
3. The device according to claim 1, wherein the pressure sensing module is divided into a plurality of pressure sensing units, the body includes a plurality of analog-to-digital converters corresponding to the pressure sensing units one by one, and the circuit board switches to obtain the sole pressure information of different pressure sensing units through an all-in-one analog switch circuit.
4. The high-precision plantar pressure image acquisition device according to claim 1, wherein the circuit board adopts an FPGA (field programmable gate array) programmable logic device as a main controller, and controls a plurality of analog-to-digital converters to work simultaneously in parallel.
5. The high-precision plantar pressure image acquisition device according to claim 1, characterized in that acquisition frequency parameters are preset by an upper computer, the body further comprises a synchronous trigger, and the synchronous trigger generates and sends trigger signal pulses according to the acquisition frequency parameters preset by the upper computer to trigger plantar pressure information acquisition and achieve the purpose of data synchronization.
6. The apparatus according to claim 1, further comprising a power supply device for supplying power to one or more bodies, wherein the plurality of bodies are powered on in a time-sharing manner and output at a constant voltage.
7. The high-precision plantar pressure image acquisition device according to claim 1, wherein the footprint acquisition units are multiple, and the multiple footprint acquisition units are spliced to form a plantar acquisition footpath for walking of acquisition personnel.
8. The device according to claim 1, wherein the sole collection platform further comprises a bearing plate and a collection protection film for protecting the pressure sensing module and contacting with the sole.
9. The device for acquiring the pressure image of the sole of the foot with high precision according to claim 1, wherein the acquisition protective film is made of TPU, leather or high-mesh umbrella cloth.
10. The device according to claim 1, wherein said body further has a start marker plate for indicating the person to be collected to enter the foot sole collection footpath.
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| CN202210095168.XA CN114488896A (en) | 2022-01-26 | 2022-01-26 | High-precision sole pressure image acquisition device |
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| CN101344421A (en) * | 2008-08-20 | 2009-01-14 | 秦皇岛首秦金属材料有限公司 | Dynamic railway truck scale data acquisition instrument and method |
| CN208012779U (en) * | 2018-01-23 | 2018-10-26 | 黄文通 | Eight channel input temp collectors |
| CN112418110A (en) * | 2020-11-26 | 2021-02-26 | 浙江大学 | Human gait stability assessment method and device |
| CN112766142A (en) * | 2021-01-15 | 2021-05-07 | 天津大学 | Plantar pressure image processing method, plantar pressure image identification method and gait analysis system |
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| CN101344421A (en) * | 2008-08-20 | 2009-01-14 | 秦皇岛首秦金属材料有限公司 | Dynamic railway truck scale data acquisition instrument and method |
| CN208012779U (en) * | 2018-01-23 | 2018-10-26 | 黄文通 | Eight channel input temp collectors |
| CN112418110A (en) * | 2020-11-26 | 2021-02-26 | 浙江大学 | Human gait stability assessment method and device |
| CN112766142A (en) * | 2021-01-15 | 2021-05-07 | 天津大学 | Plantar pressure image processing method, plantar pressure image identification method and gait analysis system |
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