CN113821111A - Computer input device using sole movement as displacement - Google Patents

Computer input device using sole movement as displacement Download PDF

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Publication number
CN113821111A
CN113821111A CN202111008994.8A CN202111008994A CN113821111A CN 113821111 A CN113821111 A CN 113821111A CN 202111008994 A CN202111008994 A CN 202111008994A CN 113821111 A CN113821111 A CN 113821111A
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CN
China
Prior art keywords
ball
rolling
displacement
sole
bearing
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Granted
Application number
CN202111008994.8A
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Chinese (zh)
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CN113821111B (en
Inventor
伍强
李艳丽
朱小娜
尹睿
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Fudan University
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Fudan University
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Priority to CN202111008994.8A priority Critical patent/CN113821111B/en
Publication of CN113821111A publication Critical patent/CN113821111A/en
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    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
    • G06F3/01—Input arrangements or combined input and output arrangements for interaction between user and computer
    • G06F3/03—Arrangements for converting the position or the displacement of a member into a coded form
    • G06F3/033—Pointing devices displaced or positioned by the user, e.g. mice, trackballs, pens or joysticks; Accessories therefor
    • G06F3/0334—Foot operated pointing devices
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61H—PHYSICAL THERAPY APPARATUS, e.g. DEVICES FOR LOCATING OR STIMULATING REFLEX POINTS IN THE BODY; ARTIFICIAL RESPIRATION; MASSAGE; BATHING DEVICES FOR SPECIAL THERAPEUTIC OR HYGIENIC PURPOSES OR SPECIFIC PARTS OF THE BODY
    • A61H39/00—Devices for locating or stimulating specific reflex points of the body for physical therapy, e.g. acupuncture
    • A61H39/04—Devices for pressing such points, e.g. Shiatsu or Acupressure
    • A—HUMAN NECESSITIES
    • A63—SPORTS; GAMES; AMUSEMENTS
    • A63F—CARD, BOARD, OR ROULETTE GAMES; INDOOR GAMES USING SMALL MOVING PLAYING BODIES; VIDEO GAMES; GAMES NOT OTHERWISE PROVIDED FOR
    • A63F13/00—Video games, i.e. games using an electronically generated display having two or more dimensions
    • A63F13/20—Input arrangements for video game devices
    • A63F13/21—Input arrangements for video game devices characterised by their sensors, purposes or types
    • A63F13/214—Input arrangements for video game devices characterised by their sensors, purposes or types for locating contacts on a surface, e.g. floor mats or touch pads
    • A—HUMAN NECESSITIES
    • A63—SPORTS; GAMES; AMUSEMENTS
    • A63F—CARD, BOARD, OR ROULETTE GAMES; INDOOR GAMES USING SMALL MOVING PLAYING BODIES; VIDEO GAMES; GAMES NOT OTHERWISE PROVIDED FOR
    • A63F13/00—Video games, i.e. games using an electronically generated display having two or more dimensions
    • A63F13/20—Input arrangements for video game devices
    • A63F13/24—Constructional details thereof, e.g. game controllers with detachable joystick handles
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61H—PHYSICAL THERAPY APPARATUS, e.g. DEVICES FOR LOCATING OR STIMULATING REFLEX POINTS IN THE BODY; ARTIFICIAL RESPIRATION; MASSAGE; BATHING DEVICES FOR SPECIAL THERAPEUTIC OR HYGIENIC PURPOSES OR SPECIFIC PARTS OF THE BODY
    • A61H2205/00—Devices for specific parts of the body
    • A61H2205/12—Feet
    • A61H2205/125—Foot reflex zones

Abstract

The invention belongs to the technical field of computer input equipment, and particularly relates to a computer input device using sole movement as displacement. The computer input device records the movement of the sole by detecting the displacement of the sole, and comprises a rolling ball driven by the sole and vertical pressing, or a camera is used for detecting the movement of sole grains (similar to an optical mouse); the linear displacement of the sole is converted into angular displacement by directly contacting the rolling ball, and then the angular displacement is sensed by using an angular displacement encoder driven by the soft cylinder, or the angular displacement is converted into voltage and current signals in direct proportion to the angular speed by using a micro direct current motor and an electrical amplifier driven by the soft cylinder. The outputs of the displacement sensor and the pressure sensor are connected to the singlechip through wires for signal processing. The device is connected with a computer through a USB interface and can be identified as a joystick or a mouse by the computer. The computer input device can be used by hands and feet, can be used for body building in the working and entertainment before a computer, and improves the working efficiency.

Description

Computer input device using sole movement as displacement
Technical Field
The invention belongs to the technical field of computer input equipment, and particularly relates to a computer input device using sole movement as displacement.
Background
With the large scale entry of integrated circuits into various areas, electronic computers have also begun to enter the areas of fitness, entertainment, and general health. In the aspect of human-computer interaction, techniques of keyboard input, manual mouse input, voice input, image input, and the like have been developed. In games, virtual reality treadmills (VR treadmills) have also been developed in which there is not only manual analog/digital input, but also foot-controlled analog/digital input, such as joysticks, pedals, footwear with sensors, and the like. However, foot-controlled analog/digital inputs have not yet expanded on the market, far from hand-controlled joysticks and mice. The main reason may be that some foot-controlled analog/digital input devices are too strong in specificity, such as streetscapes/dancers, and are applied to real person CS VR treadmills, and some are inconvenient to use, such as the former occupies a large area, and the VR treadmills need to wear special safety restraint devices for preventing tumble and bruise, and the cost is also high. In addition, most of the public do not realize the work and entertainment before the computer, if the foot control is introduced, the foot control can clear and activate the channels and collaterals, promote the blood circulation of the whole body and achieve the effect of integrating the work, the entertainment and the body building.
Disclosure of Invention
The invention aims to provide a computer input device which is more convenient to use and uses sole movement as displacement. The device does not need to occupy extra land or a complex safety protection device, and the normal desk and chair can be used with a computer with a USB interface. The application scenes also include 2D and 3D games, map experiences, 360-degree VR street view experiences, real-scene virtual visits, mouse devices and the like.
The computer input device using sole movement as displacement records the movement of the sole by detecting the sole displacement, and comprises a two-dimensional rolling ball driven based on the sole and vertical pressing (3 degrees of freedom: 2 degrees of freedom horizontal movement and 1 degree of freedom vertical pressure sensing), or uses a camera-based computer input device for detecting sole texture (texture of socks) movement (2 degrees of freedom horizontal movement), which is similar to an optical mouse. The linear displacement of the sole is converted into angular displacement through direct contact with the rolling ball or the roller, and then the angular displacement is sensed through an angular displacement encoder driven by the soft cylinder, or the angular displacement is converted into voltage and current signals in direct proportion to the angular speed through a micro direct current motor driven by the soft cylinder and an electrical amplifier. The outputs of the displacement sensor and the pressure sensor are connected to the singlechip through wires for signal processing. The whole computer is connected with the USB interface of the computer through the USB interface, adopts the USB for power supply, and is identified as a joystick or a mouse by the computer.
Specifically, the computer input device using sole movement as displacement provided by the invention comprises two identical foot-controlled displacement signal sensors corresponding to two feet of one person; fixed on a bottom plate; with this sensor, the position is indicated by the sole moving forward, backward, left, and right:
(1) using 2 soles to respectively control the sensors on 2 paths;
(2) or 2 soles are used to control the sensors on the 1-way.
The above-mentioned sensor indicating position means: front, back, left, right, i.e. X and Y directions (2 axes), or X1, Y1 and X2, Y2 directions (4 axes), "1" and "2" represent 2 soles, respectively, with one sensor per axis; such sensors are referred to as displacement sensors.
Further, the sensor may also include a vertical direction sensor, such as a Z-direction only pressure sensor.
In the invention, the displacement sensor can be realized by rotation sensing, for example, linear displacement of a sole is converted into angular displacement by directly contacting a rolling ball or a roller, and then the angular displacement is sensed by an angular displacement encoder driven by a soft cylinder.
In the invention, the displacement sensor can be realized by rotation sensing, for example, the linear displacement of the sole of a foot is converted into angular displacement by directly contacting a rolling ball or a roller, and then is converted into voltage and current signals in direct proportion to the angular velocity by using a micro direct current motor and an electric amplifier which are driven by a soft cylinder.
The outputs of the displacement sensor and the pressure sensor are connected to the singlechip through wires for signal processing.
The diameter range of the rolling ball is 50-90 mm.
The material of the ball may be a metal, such as aluminium, or a composite material, such as nylon, polyoxymethylene, or a naturally processed material, such as wood, marble, etc., and needs to be a material that does not corrode or otherwise alter the properties of the cylinder surface, such as the material of the soft cylinder surface, the bearing or ball bearing material supporting it.
The surface of the ball can be smooth or matte and can generate enough friction force with the soft cylinder.
In addition, the displacement sensor in the invention can also realize the perception of displacement in a mode of perceiving the movement of the sole pattern through the inverted camera, like the relevant part of the optical mouse. In this case:
the sole pattern is designed on a special sock, the pattern is a thick square array, and the cycle range is as follows: 1-40 mm.
In the present invention, the ball can be fixed in a plurality of ways:
the fixing method 1 of the rolling ball is supported by at least 3-point miniature single-shaft rolling bearings and comprises a bearing fixing support, rolling bearings and a straight shaft 2 ends of which are fixed on the bearing fixing support.
The rolling ball is supported by 3 bearings as supporting points, and the horizontal positions of the rolling ball can be 120 degrees, 100 degrees to 130 degrees, 140 degrees to 110 degrees and the like, and are within the range of 120 degrees plus or minus 20 degrees. The distance between the 3 points is based on that the rolling ball can be stably supported and is not easy to separate from the supporting points when rolling, and more supporting points can be adopted, for example, 4 supporting points can be horizontally arranged at 90 degrees or 90 +/-15 degrees.
The vertical height of its support point is limited to no more than the height of the center of sphere (from the base of the sphere), preferably no more than 80% of the height of the center of sphere (from the base of the sphere). Different support heights can also be used for the at least 3 support points. The function of the bearing is to make the rolling ball roll in situ and not easy to separate from the supporting bearing assembly.
3 supporting points are fixed on the bottom plate.
The fixing method 2 of the rolling ball is that the ball bearing support of at least 3-point miniature balls is composed of a ball bearing fixing support, a ball bearing fixed on the ball bearing fixing support or a ball bearing capable of rolling.
The rolling ball is supported by 3 ball bearings as supporting points, and the horizontal positions of the rolling ball can be 120 degrees, 100 degrees to 130 degrees, 140 degrees to 110 degrees and the like, and are within the range of 120 degrees plus or minus 20 degrees. The distance between the 3 points is based on that the rolling ball can be stably supported and is not easy to separate from the supporting points when rolling, and more supporting points can be adopted, for example, 4 supporting points can be horizontally arranged at 90 degrees or 90 +/-15 degrees.
Wherein, the ball bearing fixing bracket is provided with a spherical recess, one end of the spherical recess is opened (the volume of the recess part slightly exceeds the volume of a half ball), a small ball is embedded in the spherical recess, and the other part of the spherical recess is exposed. The ball can be fixed in the recess or limited to roll in the recess, but is not easy to fall out. If the small balls are fixed in the depressions, the rolling of the rolling balls supported by the three ball bearings and the surfaces of the three small balls are in sliding friction; if the ball can roll in the recess, the rolling of the ball supported by the three ball bearings is the mixed friction of rolling and sliding with the surfaces of the three balls.
The vertical height of its support point is limited to no more than the height of the center of sphere (from the base of the sphere), preferably no more than 80% of the height of the center of sphere (from the base of the sphere). Different support heights can also be used for the at least 3 support points. The function of the bearing is to make the rolling ball roll in situ and not easy to separate from the supporting bearing assembly.
3 supporting points are fixed on the bottom plate.
The whole surface of the shell can be parallel to the ground, and can also form an adjustable inclination angle with the ground.
The whole computer is connected with the USB interface of the computer through the USB interface, adopts the USB for power supply, and is identified as a joystick or a mouse by the computer.
The application scenarios of the present invention are numerous, for example:
(1) step counting;
(2) recording walking, running speed and direction;
(3) massaging Yongquan acupuncture points, recording times and intensity (Z-axis pressure), and performing physical therapy and body building;
(4) a foot-controlled mouse.
The application range comprises software needing to record the position of a main corner, such as 2D and 3D games, map experience, 360-degree VR street view experience and real-scene virtual visit.
The invention is particularly suitable for the situations of long working time, high labor intensity and lack of exercise time of people in the high-speed development of economy in China. The hands and the feet are used in front of a computer for work and entertainment, so that the body-building machine can build the body in work and build the body in entertainment, greatly improve the working efficiency and play an important role in preventing and treating office occupational diseases and chronic diseases caused by cold dampness of various lower bodies and lower limbs.
Drawings
Fig. 1 is a schematic overall structure diagram of an implementation of the present invention.
Fig. 2 is a schematic overall structure (with the top panel removed) of one implementation of the present invention.
Fig. 3 is a schematic diagram of the overall structure of one implementation of the present invention (top plate removed, angular displacement sensor removed upwards).
Fig. 4 is an implementation of the present invention. Wherein, (a) is a single rolling ball, a rolling ball supporting bearing assembly and an angular displacement sensor assembly, and (b) is a single rolling ball and an angular displacement sensor.
FIG. 5 is one implementation of the present invention. The rolling bearing comprises a straight shaft, a rolling ball support bearing assembly, a rolling bearing, a bearing inner ring and a bearing outer ring, wherein the rolling ball support bearing assembly is arranged on the straight shaft, the rolling ball support bearing assembly is arranged on the rolling bearing inner ring, and the bearing outer ring rotates relative to the inner ring.
Fig. 6 is an implementation of the present invention. Wherein, (a) is a single rolling ball and rolling ball supporting ball bearing assembly, and (b) is a single rolling ball and rolling ball supporting ball bearing assembly.
FIG. 7 is an implementation of the present invention: a single ball, a ball support bearing assembly, and a pressure sensor assembly. Wherein (a) is a perspective view. (b) Is a side view.
Fig. 8 shows another embodiment of a displacement sensor: the displacement sensing schematic diagram is realized by a mode that the inverted camera senses the movement of the sole (sock bottom) pattern.
Reference numbers in the figures: the device comprises a rolling ball 1, a bottom plate 2, a top plate 3, an angular displacement sensor assembly 4, a rolling ball supporting bearing assembly 5, a soft cylinder 6, a transmission bearing 7, a transmission bearing support 8, an angular displacement sensor 9, a spring leaf 10, a rolling bearing 11 and a bearing fixing support 12, wherein the rolling ball supporting bearing assembly is a rolling ball, the angular displacement sensor assembly is an angular displacement sensor assembly, and the bearing fixing support is a spring leaf; 13 is a ball bearing, and 14 is a ball bearing fixing bracket; 15 is a supporting spring, and 16 is a main spring; the sock bottom pattern is shown at 17, the illumination light source is shown at 18, the camera is shown at 19, the side plate is shown at 20, and the pressure sensor is shown at 21.
Detailed Description
Example (b):
fig. 1 is a schematic view of the whole structure of an implementation mode of the invention, showing a rolling ball, a whole frame and the like, wherein two through holes are arranged on a top plate, 2 rolling balls extend out of the through holes, the top of the rolling balls is higher than the plane of the top plate, and the rolling balls are convenient to rub soles of feet against the rolling balls to push the rolling balls to roll.
Fig. 2 shows a schematic view of the overall structure of the top plate after it is removed, showing the bottom plate, the side plates (one on each of the four sides), the angular displacement sensor assembly, and the like. The bottom plate and the side plates can be integrated into a whole, the bottom plate and the side plates are molded in one step through mold opening and then connected with the top plate through screws, the top plate and the side plates can also be integrated into a whole, and the bottom plate is connected with the bottom plate through screws.
Figure 3 further shows ball support bearing assemblies (3 per ball) or the like mounted on the base, where the balls are supported using 3 bearings as support points and are positioned at 120 deg., or 100 deg. -130 deg., or 140 deg. -110 deg., or the like, within 120 deg. + -20 deg.. The vertical height of its support point is limited to no more than the height of the center of sphere (from the base of the sphere), preferably no more than 80% of the height of the center of sphere (from the base of the sphere). More support points, e.g. 4, may be used, the horizontal positions of which may be 90 ° or 90 ± 15 ° to each other. Different support heights can also be used for the at least 3 support points. The function of the bearing is to make the rolling ball roll in situ and not easy to separate from the supporting bearing assembly.
Figure 4 further shows a single rolling ball, a rolling ball support bearing assembly, an angular displacement sensor assembly and a decomposition, wherein the two mutually orthogonal directions of movement of the single rolling ball are sensed by a 2-axis angular displacement sensor, each axis of the angular displacement sensor assembly is composed of an elastic reed, a transmission shaft bracket and a bearing, a soft cylinder in frictional contact with the rolling ball, a transmission shaft connected with the soft cylinder, and an angular displacement sensor. One end of the elastic reed is connected with the transmission shaft bracket and the bearing, and the other end of the elastic reed is fixed on the bottom plate, so that a lateral acting force tightly attached to the rolling ball is applied to the soft cylinder, and the soft cylinder is ensured to be tightly connected with the rolling ball so as to transmit rotary motion.
FIG. 5 further illustrates the disassembly of a single ball, ball-supporting bearing assembly, each of which is fixed to the base plate and consists of a bearing mounting bracket, a rolling bearing, and a straight shaft with the 2 end fixed to the bearing mounting bracket. Wherein each bearing is free to rotate about a straight axis.
FIG. 6 further illustrates another ball support bearing assembly: the single rolling ball and rolling ball supporting ball bearing (3 small ball supporting) assembly and the single rolling ball supporting ball bearing assembly are arranged, wherein each rolling ball supporting ball bearing assembly is fixed on the bottom plate and consists of a ball bearing fixing support, a ball bearing fixing support fixed on the ball bearing fixing support or a ball bearing capable of rolling. Wherein, the ball bearing fixing bracket is provided with a spherical recess, one end of the spherical recess is opened (the volume of the recess part slightly exceeds the volume of a half ball), a small ball is embedded in the spherical recess, and the other part of the spherical recess is exposed. The ball can be fixed in the recess or limited to roll in the recess, but is not easy to fall out. If the small balls are fixed in the depressions, the rolling of the rolling balls supported by the three ball bearings and the surfaces of the three small balls are in sliding friction; if the ball can roll in the recess, the rolling of the ball supported by the three ball bearings is the mixed friction of rolling and sliding with the surfaces of the three balls.
Fig. 7 further shows the disassembly of a single ball, a ball support bearing assembly, a pressure sensor assembly (perspective view and test chart), a pressure sensor assembly, wherein the pressure sensor assembly is composed of an upper plate, a lower plate, a main spring, a pressure sensor, and at least 3 support springs. The pressure sensor is inserted between the rolling ball supporting bearing/ball bearing assembly and the bottom plate, wherein the upper plate and the rolling ball supporting bearing/ball bearing assembly are fixed, the lower plate and the bottom plate are fixed, and the upper plate and the lower plate are connected with the pressure sensor through at least 3 supporting springs and main springs. The support springs also limit lateral movement of the upper plate. The main spring plays a role in conducting the vertical pressure of the sole on the rolling ball to the pressure sensor under the ground.
Fig. 8 shows another embodiment of the displacement sensor: the displacement is sensed by a mode that an inverted camera senses the movement of a sole (sock bottom) pattern, and the method is similar to a method for detecting the displacement by an optical mouse.

Claims (7)

1. A computer input device using sole movement as displacement is characterized in that the device comprises two identical foot-controlled displacement signal sensors corresponding to two feet of a person; fixed on a bottom plate; with this sensor, the position is indicated by the sole moving forward, backward, left, and right:
(1) 2 soles are used to respectively control the sensors on 2 paths,
(2) or 2 soles are used for jointly controlling the sensors on the 1-path;
the above-mentioned sensor indicating position means: front, back, left, right, i.e. X and Y directions (2 axes), or X1, Y1 and X2, Y2 directions, "1" and "2" respectively represent 2 soles, with one sensor per axis; the sensor is called a displacement sensor;
a vertical direction sensor, namely a pressure sensor for Z direction;
the displacement sensor is implemented in a rotation sensing mode, namely linear displacement of a sole is converted into angular displacement through direct contact with a rolling ball or a roller, and then the angular displacement is sensed through an angular displacement encoder driven by a soft cylinder; or, the voltage and current signals which are in direct proportion to the angular speed are converted by a micro direct current motor and an electric amplifier which are driven by the soft cylinder;
the outputs of the displacement sensor and the pressure sensor are connected to the singlechip through wires for signal processing.
2. The computer input device of claim 1, wherein the ball has a diameter of 50-90 mm.
3. The computer input device of claim 1, wherein the surface of the ball is smooth or matte and can generate sufficient friction with the soft cylinder.
4. The computer input device of claim 1, wherein the ball is fixed in one of the following ways:
the method 1 is characterized in that at least 3-point miniature single-shaft rolling bearings are supported and fixed, and each single-shaft rolling bearing support is composed of a bearing fixing support, a rolling bearing and a straight shaft, wherein the straight shaft is fixed on the bearing fixing support through 2 ends;
when 3 bearings are used as supporting points for supporting, the horizontal positions of the 3 bearings are 120 degrees or within the range of 120 +/-20 degrees; the vertical height of the supporting point is limited to be not more than the height of the center of a sphere; 3 supporting points are fixed on the bottom plate;
mode 2, the ball bearing support of at least 3-point miniature balls is fixed, and the ball bearing support consists of a ball bearing fixing support, a ball bearing fixed on the ball bearing fixing support or a ball bearing capable of rolling;
when the rolling ball adopts 3 ball bearings as supporting points for supporting, the horizontal positions of the 3 ball bearings are 120 degrees or within the range of 120 +/-20 degrees;
wherein, the ball bearing fixing bracket is provided with a spherical recess, one end of the spherical recess is opened, the volume of the concave part slightly exceeds the volume of a half ball, and a small ball is embedded into the spherical recess, and the other part of the spherical recess is exposed; the small ball is fixed in the dent or limited in the dent to roll for a limited time, but is not easy to fall off; if the small balls are fixed in the depressions, the rolling of the rolling balls supported by the three ball bearings and the surfaces of the three small balls are in sliding friction; if the small balls can roll in the depressions, the rolling of the rolling balls supported by the three ball bearings and the surfaces of the three small balls are rolling or mixed friction of rolling and sliding;
the vertical height of the supporting points is limited to be not more than the height of the sphere center, and 3 supporting points are fixed on the bottom plate.
5. The computer input device as claimed in claim 1, wherein the displacement sensor senses the displacement by using an inverted camera to sense the movement of the sole pattern, in this case, the sole pattern is designed on a special sock, the pattern is a thick square array, and the period range is: 1-40 mm.
6. The computer input device of claim 1, wherein the two orthogonal movements of a single rolling ball are sensed by a 2-axis angular displacement sensor, and the assembly of the angular displacement sensor on each axis is composed of an elastic reed, a transmission shaft bracket and a bearing, a soft cylinder in frictional contact with the rolling ball, a transmission shaft connected with the soft cylinder, and angular displacement sensing; one end of the elastic reed is connected with the transmission shaft bracket and the bearing, and the other end of the elastic reed is fixed on the bottom plate, so that a lateral acting force tightly attached to the rolling ball is applied to the soft cylinder, and the soft cylinder is ensured to be tightly connected with the rolling ball so as to transmit rotary motion.
7. The computer input device of claim 1, wherein the assembly of pressure sensors is composed of an upper plate, a lower plate, a main spring, a pressure sensor, and at least 3 supporting springs; the pressure sensor is inserted between the rolling ball supporting bearing/ball bearing assembly and the bottom plate, wherein the upper plate is fixed with the rolling ball supporting bearing/ball bearing assembly, the lower plate is fixed with the bottom plate, and the upper plate and the lower plate are connected with the pressure sensor through at least 3 supporting springs and main springs; the supporting spring has a limiting effect on the transverse movement of the upper plate; the main spring plays a role in conducting the vertical pressure of the sole on the rolling ball to the pressure sensor under the ground.
CN202111008994.8A 2021-08-31 2021-08-31 Computer input device using sole movement as displacement Active CN113821111B (en)

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Publication number Priority date Publication date Assignee Title
US20030117373A1 (en) * 2001-12-17 2003-06-26 Tai-Her Yang Foot controlled rolling ball signal generator
CN1477490A (en) * 2002-05-14 2004-02-25 陈长城 Multi-freedom signal input device for computer input
WO2006080858A1 (en) * 2005-01-30 2006-08-03 Simtrix Limited Computer mouse peripheral
CN202159309U (en) * 2011-02-22 2012-03-07 申金坡 Multipurpose mouse pen

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Title
刘博伟；李省阁；: "一种通过测量角位移测量电动机转矩波动系数的方法", 微电机, no. 07 *
赵勇;王士军;刘敦宁;宋信勇;郑晓龙;张军伟;: "基于LabVIEW的人体下肢力量动力学数据测试仪设计与研究", 机床与液压, no. 04 *

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