CN111556689B - Road surface sensing circuit and protector thereof - Google Patents
Road surface sensing circuit and protector thereof Download PDFInfo
- Publication number
- CN111556689B CN111556689B CN202010392437.XA CN202010392437A CN111556689B CN 111556689 B CN111556689 B CN 111556689B CN 202010392437 A CN202010392437 A CN 202010392437A CN 111556689 B CN111556689 B CN 111556689B
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- layer
- friction
- sensing circuit
- road surface
- power supply
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-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- H05K5/00—Casings, cabinets or drawers for electric apparatus
- H05K5/06—Hermetically-sealed casings
- H05K5/065—Hermetically-sealed casings sealed by encapsulation, e.g. waterproof resin forming an integral casing, injection moulding
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- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01F—ADDITIONAL WORK, SUCH AS EQUIPPING ROADS OR THE CONSTRUCTION OF PLATFORMS, HELICOPTER LANDING STAGES, SIGNS, SNOW FENCES, OR THE LIKE
- E01F11/00—Road engineering aspects of Embedding pads or other sensitive devices in paving or other road surfaces, e.g. traffic detectors, vehicle-operated pressure-sensitive actuators, devices for monitoring atmospheric or road conditions
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01P—MEASURING LINEAR OR ANGULAR SPEED, ACCELERATION, DECELERATION, OR SHOCK; INDICATING PRESENCE, ABSENCE, OR DIRECTION, OF MOVEMENT
- G01P3/00—Measuring linear or angular speed; Measuring differences of linear or angular speeds
- G01P3/64—Devices characterised by the determination of the time taken to traverse a fixed distance
- G01P3/66—Devices characterised by the determination of the time taken to traverse a fixed distance using electric or magnetic means
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01V—GEOPHYSICS; GRAVITATIONAL MEASUREMENTS; DETECTING MASSES OR OBJECTS; TAGS
- G01V3/00—Electric or magnetic prospecting or detecting; Measuring magnetic field characteristics of the earth, e.g. declination, deviation
- G01V3/15—Electric or magnetic prospecting or detecting; Measuring magnetic field characteristics of the earth, e.g. declination, deviation specially adapted for use during transport, e.g. by a person, vehicle or boat
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J7/32—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries for charging batteries from a charging set comprising a non-electric prime mover rotating at constant speed
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02N—ELECTRIC MACHINES NOT OTHERWISE PROVIDED FOR
- H02N1/00—Electrostatic generators or motors using a solid moving electrostatic charge carrier
- H02N1/04—Friction generators
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- H05K5/00—Casings, cabinets or drawers for electric apparatus
- H05K5/02—Details
- H05K5/0217—Mechanical details of casings
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- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Physics & Mathematics (AREA)
- Geology (AREA)
- Remote Sensing (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Environmental & Geological Engineering (AREA)
- Geophysics (AREA)
- Power Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Architecture (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Cleaning Of Streets, Tracks, Or Beaches (AREA)
- Road Signs Or Road Markings (AREA)
Abstract
The invention provides a protective device of a pavement sensing circuit, which solves the problems that the traditional pavement sensing device has high use cost, cannot adapt to complex climate, and is difficult to overhaul and cannot be replaced by an embedded sensing device, wherein the pavement sensing circuit comprises a lead for electrically connecting each component of the sensing circuit; still include protection device, protection device includes bottom, the upper portion layer of making by hot melt material, still includes the lamellar flexible clamping piece layer of making by insulating material between bottom and the upper portion layer, and the clamping piece layer sets up a plurality of through-holes that are the array and arrange, and the wire is fixed to be arranged in the surface of clamping piece layer, and is fixed through the hot melt between bottom and the upper portion layer, and power supply unit can dismantle fixed mounting in the through-hole position of clamping piece layer.
Description
Technical Field
The invention relates to the field of road surface sensing circuits, in particular to a road surface sensing circuit.
Background
The information society inevitably enters the world of everything interconnection, and information of all affairs in the traditional society is integrated into the Internet through sensors and communication so as to be convenient to inquire and call. It is a major difficult problem to transform an existing road into an informationized road with information collection and transmission.
It is an important task to combine the sensor circuit with the road safety and reliability. The traditional road surface sensing devices are divided into two types, one type is that the sensing devices are fixed on one side or above the road surface through fixing devices, and the information is read through visual identification or infrared sensing technology, but the sensing devices can be reliably fixed and installed only by a large number of auxiliary devices, so that the reconstruction cost is huge for the reconstruction of roads of tens of millions of kilometers, and the visual identification and infrared sensing technologies are sensitive to weather conditions and are not beneficial to popularization and use in regions with severe weather; in addition, when the highway is laid, the sensing equipment is buried to realize an integral structure with the highway, but the conventional highway cannot be reconstructed or is difficult to reconstruct, and on the other hand, the buried sensing equipment is very difficult to repair and replace.
Disclosure of Invention
In view of the above situation, the present invention provides a protection device for a road surface sensing circuit, which aims to solve the problems that the conventional road surface sensing device has high use cost, cannot adapt to complex climate, and is difficult to repair and replace the embedded type sensing device.
The technical scheme includes that the road surface sensing circuit comprises a wire for electrically connecting each component of the sensing circuit, and further comprises a power supply unit, wherein the power supply unit is electrically connected with the wire for supplying power to the road surface sensing circuit; still include protection device, protection device includes bottom, the upper portion layer of making by hot melt material, still include the lamellar flexible clamping piece layer of making by insulating material between bottom and the upper portion layer, the clamping piece layer sets up a plurality of through-holes that are the array and arrange, the wire is fixed arrange in the surface of clamping piece layer, it is fixed through the hot melt between bottom and the upper portion layer, power supply unit can dismantle fixed mounting in the through-hole position of clamping piece layer.
In the above or some embodiments, the power supply units are multiple and distributed in an array at the positions of the through holes of the clip layer.
In the above or some embodiments, the power supply unit includes a protective casing assembly, the protective casing assembly includes an upper casing and a lower casing, the upper casing and the lower casing are relatively fixedly mounted, and a mounting cavity is provided at a position corresponding to the upper casing and the lower casing, a power generation unit is provided in the mounting cavity, the power generation unit includes a plurality of wavy elastic frames arranged at intervals in a ring shape, plate-shaped layers integrally formed with the elastic frames are provided at both upper and lower ends of the elastic frames, and a plurality of sets of friction power generation units parallel to the plate-shaped layers are fixedly provided between the elastic frames; still including being located casing upper portion with go up casing sliding fit's pushing down the piece, the piece is equipped with the pressure head that is located casing top down, the pressure head with leave the interval between the last casing upper portion, form the structure that the pressure head atress pushed down friction power generation unit axial deformation.
In the above or some embodiments, the friction power generation unit includes a friction induction layer made of a conductive material, and a friction electrode layer, a friction layer made of a friction material is coated on a surface of the induction layer facing the friction electrode layer, and a space is provided between the friction layer and the friction electrode layer, so that a structure is formed in which the friction layer and the friction electrode layer can be contacted and separated through axial deformation of the elastic frame.
In the above or some embodiments, the friction induction layers of the friction power generation units are connected by a wire to form one output electrode of the power supply unit, the friction electrode layers of the friction power generation units are connected by a wire to form another output electrode of the power supply unit, the output electrodes are connected to the input end of the rectifying and filtering circuit, and the current output by each friction power generation unit is rectified by the rectifying and filtering circuit.
In the above or some embodiments, the upper casing and the lower casing are both truncated cone frustum-shaped structures, a protruding plug is arranged at the lower part of the upper casing, a socket matched with the plug is arranged at the center of the lower casing, and the upper casing and the lower casing are fixedly inserted and matched through the plug and the socket.
Compared with the prior art, this scheme can adopt resin type hot melt coating as bottom and upper portion material, bottom and upper portion material accessible heating device are fixed as an organic whole with bottom and upper portion material, hot melt in-process bottom and upper portion material are connected through the through-hole of splint layer and are formed fixed integrative structure, this scheme is in concrete use, road surface sensing circuit encapsulates equally between bottom and upper layer material, and each electronic components of the road surface sensing circuit of telling carries out fixed protection through protecting casing. Compared with the traditional installation of the road surface sensing device, the technical scheme can directly transform the old road surface without damaging the road surface, and the bottom layer and the upper layer material can be separated by the heating device, so that the road surface sensing device is conveniently separated.
Drawings
Fig. 1 is a schematic structural diagram of the scheme.
Fig. 2 is a schematic side view of the present embodiment.
Fig. 3 is a schematic structural diagram of the protective shell assembly in the present embodiment.
Fig. 4 is a schematic structural view of the sandwich layer in the present scheme.
Fig. 5 is a schematic structural diagram of an embodiment of the power generation unit in the present embodiment.
Detailed Description
In order to more clearly and fully illustrate the core concepts of the present invention, the invention will be further described and illustrated with reference to specific embodiments. It should be noted that the following specific embodiments are intended to illustrate the inventive concept and are not intended to limit the implementation of the present invention, so the implementation of the present invention includes but is not limited to what is described in the present application, and the replacement and avoidance by those skilled in the art according to the inventive concept should be considered as falling within the scope of the present invention which is claimed or should not be granted.
In view of the above situation, the present invention provides a protection device for a road surface sensing circuit, which aims to solve the problems that the conventional road surface sensing device has high use cost, cannot adapt to complex climate, and is difficult to repair and replace the embedded type sensing device.
The technical scheme is that the road surface sensing circuit comprises a power supply unit 101, a processor unit 104, a storage unit 105 and a communication unit 106. The power supply unit 101 comprises a plurality of power generation units 102 distributed in an array manner, each power generation unit 102 comprises a plurality of wavy elastic frames 304 arranged at intervals in a ring shape, plate-shaped layers 305 integrally formed with the elastic frames 304 are arranged at the upper end and the lower end of each elastic frame 304, a plurality of groups of friction power generation units are fixedly arranged between the elastic frames 304 and parallel to the plate-shaped layers 305, the power generation unit further comprises a lower pressing piece 306 located at the upper part of the upper shell 301 and in sliding fit with the upper shell 301, a pressure head 307 located above the upper shell 301 is arranged on the lower pressing piece 306, a gap is reserved between the pressure head 307 and the upper part of the upper shell 301, and a structure that the pressure head 307 is stressed to press the friction power generation units to deform axially is formed. When a vehicle presses an area formed by arranging the power generation units 102, the power generation units 102 at different positions of the area rolled by the wheel lock generate electric signals, time difference exists between the electric signals generated by the power generation units 102 in different areas due to rolling action of wheels, speed information of the vehicle can be obtained according to the time difference, the electric signals of the power supply unit 101 are connected with the processor unit 104, the memory unit and the power storage unit 103, of course, the power supply unit 101 is not directly connected with the processor unit 104, the memory unit and the power storage unit 103 through electric signals of a signal amplification circuit, a rectification filter circuit and an AD conversion circuit, the power supply unit 101 is connected with the processor unit 104, the memory unit and the power storage unit 103 through electric signals of a signal amplification circuit, a rectification filter circuit and an AD conversion circuit, the information of the rolled area of the vehicle is judged according to the position information of each power generation unit 102 stored in the storage unit 105, while the vehicle speed information is determined from the time difference of the signals of the power generating units 102 of different positions, in particular in the set direction, of the different power generating units 102. The pavement sensing circuit further includes a communication unit 106, the communication unit 106 including, but not limited to, a radio frequency circuit coupled to a read circuit that can read information stored in the memory unit 105, including vehicle crush zone information, vehicle speed information, etc. The road surface sensing circuit further comprises a lead for electrically connecting each component of the sensing circuit, wherein the lead is made of a thin sheet-packed conductive material in the scheme and can be fixed on the surface of the clamping sheet layer 203 in a printing mode.
In the above or some embodiments, the sensing circuit is divided into a power generation unit 102 area and a signal processing area, the power generation unit 102 is located in the power generation unit 102 area, and the power storage unit 103, the communication unit 106, the processor unit 104 and the storage unit 105 are located in the signal processing area; and the corresponding signal processing area is provided with a shell which is packaged in the signal processing area.
In the above or some embodiments, the road surface sensing circuit is provided with the protection device 200, the protection device 200 includes a bottom layer 201 and an upper layer 202 made of a hot-melt material, a sheet-shaped flexible clip layer 203 made of an insulating material is further included between the bottom layer 201 and the upper layer 202, the clip layer 203 is provided with a plurality of through holes 204 arranged in an array, the wires are fixedly arranged on the surface of the clip layer 203, the bottom layer 201 and the upper layer 202 are fixed through hot melting, and the power supply unit 101 is detachably and fixedly mounted at the positions of the through holes 204 of the clip layer 203. When the hot-melt paint is used specifically, the hot-melt paint in a molten state can be coated on the position of a road surface to serve as a bottom layer 201, after the temperature of the bottom layer 201 is reduced for a period of time, the surface temperature is lower than 70 ℃, the surface is still in a softening state, at the moment, a clamping piece layer 203 with a road surface sensing circuit is laid on the upper portion of the bottom layer 201, the softened surface of the bottom layer 201 penetrates into the upper surface of the clamping piece layer 203 through an empty through hole 204, at the moment, an upper layer 202 is coated on the surface of the clamping piece layer 203, at the moment, the clamping piece layer 203 is covered by the upper layer 202 and is fused with the bottom layer 201 to form an integrated structure, heat is formed by tightly connecting the bottom layer 201 with the upper layer 202 through. In order to ensure the paving process, the power unit 101 protective shell assembly 300 and the casing are both made of epoxy resin glass fiber board composite material, and the heat insulation performance of the epoxy resin glass fiber board composite material protects electronic components of the hot-melt coating in the initial period of packaging.
Further, the protective casing assembly 300 includes an upper casing 301 and a lower casing 302, the upper casing 301 and the lower casing 302 are relatively fixedly installed and are provided with an installation cavity 303 at a relative position, a power generation unit 102 is arranged in the installation cavity 303, the power generation unit 102 includes a plurality of elastic frames 304 arranged in a wavy annular interval, both upper and lower ends of the elastic frames 304 are provided with plate-shaped layers 305 integrally formed with the elastic frames 304, wherein the elastic frames and the plate-shaped layers are made of the same material, including but not limited to elastic plastics, such as one of PE, TUV or HUS, of course, elastic metals can be used as their skeleton structure, and are made by laying insulating materials on the surface of the skeleton structure, in the embodiment shown in fig. 4, the elastic frames are made of wavy materials, wherein the friction material layer can be fixedly connected with the elastic frames in a whole, the adjacent friction electrode layers can be fixed together by the middle supporting layer in order to make the structure more compact; a plurality of groups of friction power generation units which are parallel to the plate-shaped layer 305 are fixedly arranged between the elastic frames 304; still including being located casing 301 upper portion and last casing 301 sliding fit's down piece 306, down piece 306 is equipped with the pressure head 307 that is located casing 301 top, leaves the interval between pressure head 307 and the last casing 301 upper portion, forms pressure head 307 atress and pushes down the structure of friction power generation unit axial deformation, it is truncated cone column structure to go up casing 301, casing 302 down, it is equipped with convex plug to go up casing 301 lower part, casing 302 center department down be equipped with plug complex socket, go up casing 301 with casing 302 carries out fixed grafting cooperation through plug, socket down.
In the above or some embodiments, the friction power generating unit comprises a friction induction layer 308 made of conductive material, a friction electrode layer 309, the surface of the sensing layer facing the friction electrode layer 309 is coated with a friction layer 310 made of a friction material, a space is arranged between the friction layer 310 and the friction electrode layer 309, a structure which can be axially deformed by the elastic frame 304 to further enable the friction layer 310 to be in contact with and separated from the friction electrode layer 309 is formed, each friction induction layer 308 of the friction power generation units is connected through a lead to form one output electrode of the power supply unit, the friction electrode layer 309 of each friction power generation unit is connected through a lead to form the other output electrode of the power supply unit, the output electrode is connected to the input end of the rectifying and filtering circuit, and the current output by each friction power generation unit is rectified through the rectifying and filtering circuit.
Compared with the prior art, this scheme can adopt resin type hot melt coating as bottom 201 and upper portion's material, bottom 201 and upper portion's material accessible heating device are fixed as an organic whole with bottom 201 and upper portion's material, hot melt in-process bottom 201 and upper portion's material are connected through the through-hole 204 of splint layer 203 and are formed fixed integrative structure, this scheme is in concrete use, road surface sensing circuit encapsulates equally between bottom 201 and upper portion's material, and each electronic components of the road surface sensing circuit of telling carries out fixed protection through protecting casing. Compared with the traditional installation of the road surface sensing device, the technical scheme can be directly transformed through the old road surface, the road surface is not needed to be damaged, and the bottom layer 201 and the upper layer material can be separated through the heating device, so that the road surface sensing device is conveniently separated.
Although exemplary embodiments of the present disclosure have been described, it will be understood by those skilled in the art that various changes and modifications can be made to the exemplary embodiments of the present disclosure without departing from the spirit and scope of the present disclosure. Accordingly, all changes and modifications are intended to be included within the scope of the present disclosure as defined in the appended claims.
Claims (6)
1. The protective device for the road surface sensing circuit comprises a lead wire used for electrically connecting each component of the sensing circuit, and further comprises a power supply unit (101), wherein the power supply unit (101) is electrically connected with the road surface sensing circuit and used for supplying power to the road surface sensing circuit, the protective device is characterized by further comprising a rectifying and filtering circuit and an electricity storage unit (103) which are electrically connected with the power supply unit (101), the power supply unit (101) comprises a plurality of electricity generation units (102) which are distributed in an array manner, the electricity generation units (102) are used for capturing the motion of passing vehicles and generating electric energy, the electric energy is processed by the rectifying and filtering circuit and then charges the electricity storage unit (103), the protective device (200) comprises a bottom layer (201) and an upper layer (202) which are made of hot melting materials, and a flaky flexible clamping piece layer (203) made of insulating materials is further arranged between the bottom layer (201) and the upper layer (202), the utility model discloses a power supply unit, including splint layer (203), wire, bottom layer (201) and upper portion layer (202), power supply unit (101) can dismantle fixed mounting in through-hole (204) position of splint layer (203).
2. The road surface sensing circuit protection device according to claim 1, wherein the power supply unit (101) is plural and distributed in an array at the position of each through hole (204) of the clamping sheet layer (203).
3. The road surface sensing circuit protection device according to claim 1 or 2, wherein the power supply unit (101) comprises a protection housing assembly (300), the protection housing assembly (300) comprises an upper housing (301) and a lower housing (302), the upper housing (301) and the lower housing (302) are relatively fixedly mounted, mounting cavities (303) are arranged at the relative positions, power generation units (102) are arranged in the mounting cavities (303), the power generation units (102) comprise a plurality of wavy elastic frames (304) which are annularly arranged at intervals, plate-shaped layers (305) which are integrally formed with the elastic frames (304) are arranged at the upper end and the lower end of each elastic frame (304), and a plurality of groups of friction power generation units which are parallel to the plate-shaped layers (305) are fixedly arranged between the elastic frames (304); still including being located last casing (301) upper portion with go up casing (301) sliding fit's pushing down piece (306), pushing down piece (306) are equipped with pressure head (307) that are located last casing (301) top, pressure head (307) with leave the interval between last casing (301) upper portion, form pressure head (307) atress and push down the structure that friction power generation unit axial warp.
4. The road surface sensing circuit protection device according to claim 3, wherein the friction power generation unit comprises a friction induction layer (308) made of a conductive material, a friction electrode layer (309), a friction layer (310) made of a friction material is coated on the surface of the induction layer facing the friction electrode layer (309), a gap is arranged between the friction layer (310) and the friction electrode layer (309), and a structure capable of being axially deformed by the elastic frame (304) to enable the friction layer (310) and the friction electrode layer (309) to be in contact with and separated from each other is formed.
5. The road surface sensing circuit protection device according to claim 4, wherein the friction induction layers (308) of the friction power generation units are connected through a lead to form one output electrode of the power supply unit, the friction electrode layers (309) of the friction power generation units are connected through a lead to form the other output electrode of the power supply unit, the output electrodes are connected to the input end of the rectifying and filtering circuit, and the current output by each friction power generation unit is rectified through the rectifying and filtering circuit.
6. The road surface sensing circuit protection device according to claim 5, wherein the upper shell (301) and the lower shell (302) are both in a truncated cone frustum-shaped structure, a protruding plug is arranged at the lower part of the upper shell (301), a socket matched with the plug is arranged at the center of the lower shell (302), and the upper shell (301) and the lower shell (302) are fixedly inserted and matched through the plug and the socket.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010392437.XA CN111556689B (en) | 2020-05-11 | 2020-05-11 | Road surface sensing circuit and protector thereof |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010392437.XA CN111556689B (en) | 2020-05-11 | 2020-05-11 | Road surface sensing circuit and protector thereof |
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| Publication Number | Publication Date |
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| CN111556689A CN111556689A (en) | 2020-08-18 |
| CN111556689B true CN111556689B (en) | 2021-06-04 |
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| CN202010392437.XA Expired - Fee Related CN111556689B (en) | 2020-05-11 | 2020-05-11 | Road surface sensing circuit and protector thereof |
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| CN202090301U (en) * | 2011-04-28 | 2011-12-28 | 华南理工大学 | Integral dot-matrix type pressure sensitive sensor device for motor vehicle axle identification |
| CN103366562A (en) * | 2012-09-12 | 2013-10-23 | 国家纳米科学中心 | Traffic monitoring sensor and detection method |
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| CN106325583A (en) * | 2015-07-10 | 2017-01-11 | 宸鸿科技(厦门)有限公司 | Pressure sensing input device |
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| US9187316B2 (en) * | 2013-07-19 | 2015-11-17 | University Of Windsor | Ultrasonic sensor microarray and method of manufacturing same |
| CN203519128U (en) * | 2013-10-11 | 2014-04-02 | 清华大学 | Highway piezoelectric dynamic weighing sensor adopting PVDF |
| CN107195137A (en) * | 2017-06-27 | 2017-09-22 | 苏州市国晶电子科技有限公司 | A kind of drop-proof POS |
| CN207340372U (en) * | 2017-09-04 | 2018-05-08 | 江苏非寻信息技术有限公司 | A kind of sensor-based high security protective device |
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2020
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Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP3613593B2 (en) * | 2002-03-29 | 2005-01-26 | 国土交通省国土技術政策総合研究所長 | Vehicle position detection device |
| CN101560749A (en) * | 2009-05-13 | 2009-10-21 | 长安大学 | Sensor for detecting dynamic response of asphalt pavement |
| CN201952753U (en) * | 2011-01-18 | 2011-08-31 | 北京中交国通智能交通***技术有限公司 | Sensor |
| CN202090301U (en) * | 2011-04-28 | 2011-12-28 | 华南理工大学 | Integral dot-matrix type pressure sensitive sensor device for motor vehicle axle identification |
| CN103366562A (en) * | 2012-09-12 | 2013-10-23 | 国家纳米科学中心 | Traffic monitoring sensor and detection method |
| CN104314019A (en) * | 2014-11-11 | 2015-01-28 | 大连理工大学 | Traffic detection sensor |
| CN106325583A (en) * | 2015-07-10 | 2017-01-11 | 宸鸿科技(厦门)有限公司 | Pressure sensing input device |
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| CN111556689A (en) | 2020-08-18 |
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