WO2013187163A1 - 状態検出装置 - Google Patents
状態検出装置 Download PDFInfo
- Publication number
- WO2013187163A1 WO2013187163A1 PCT/JP2013/063268 JP2013063268W WO2013187163A1 WO 2013187163 A1 WO2013187163 A1 WO 2013187163A1 JP 2013063268 W JP2013063268 W JP 2013063268W WO 2013187163 A1 WO2013187163 A1 WO 2013187163A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- antenna
- printed wiring
- wiring board
- detection device
- tire
- Prior art date
Links
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60C—VEHICLE TYRES; TYRE INFLATION; TYRE CHANGING; CONNECTING VALVES TO INFLATABLE ELASTIC BODIES IN GENERAL; DEVICES OR ARRANGEMENTS RELATED TO TYRES
- B60C23/00—Devices for measuring, signalling, controlling, or distributing tyre pressure or temperature, specially adapted for mounting on vehicles; Arrangement of tyre inflating devices on vehicles, e.g. of pumps or of tanks; Tyre cooling arrangements
- B60C23/02—Signalling devices actuated by tyre pressure
- B60C23/04—Signalling devices actuated by tyre pressure mounted on the wheel or tyre
- B60C23/0408—Signalling devices actuated by tyre pressure mounted on the wheel or tyre transmitting the signals by non-mechanical means from the wheel or tyre to a vehicle body mounted receiver
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q1/00—Details of, or arrangements associated with, antennas
- H01Q1/52—Means for reducing coupling between antennas; Means for reducing coupling between an antenna and another structure
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60C—VEHICLE TYRES; TYRE INFLATION; TYRE CHANGING; CONNECTING VALVES TO INFLATABLE ELASTIC BODIES IN GENERAL; DEVICES OR ARRANGEMENTS RELATED TO TYRES
- B60C23/00—Devices for measuring, signalling, controlling, or distributing tyre pressure or temperature, specially adapted for mounting on vehicles; Arrangement of tyre inflating devices on vehicles, e.g. of pumps or of tanks; Tyre cooling arrangements
- B60C23/02—Signalling devices actuated by tyre pressure
- B60C23/04—Signalling devices actuated by tyre pressure mounted on the wheel or tyre
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60C—VEHICLE TYRES; TYRE INFLATION; TYRE CHANGING; CONNECTING VALVES TO INFLATABLE ELASTIC BODIES IN GENERAL; DEVICES OR ARRANGEMENTS RELATED TO TYRES
- B60C23/00—Devices for measuring, signalling, controlling, or distributing tyre pressure or temperature, specially adapted for mounting on vehicles; Arrangement of tyre inflating devices on vehicles, e.g. of pumps or of tanks; Tyre cooling arrangements
- B60C23/02—Signalling devices actuated by tyre pressure
- B60C23/04—Signalling devices actuated by tyre pressure mounted on the wheel or tyre
- B60C23/0408—Signalling devices actuated by tyre pressure mounted on the wheel or tyre transmitting the signals by non-mechanical means from the wheel or tyre to a vehicle body mounted receiver
- B60C23/0422—Signalling devices actuated by tyre pressure mounted on the wheel or tyre transmitting the signals by non-mechanical means from the wheel or tyre to a vehicle body mounted receiver characterised by the type of signal transmission means
- B60C23/0433—Radio signals
- B60C23/0447—Wheel or tyre mounted circuits
- B60C23/0452—Antenna structure, control or arrangement
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60C—VEHICLE TYRES; TYRE INFLATION; TYRE CHANGING; CONNECTING VALVES TO INFLATABLE ELASTIC BODIES IN GENERAL; DEVICES OR ARRANGEMENTS RELATED TO TYRES
- B60C23/00—Devices for measuring, signalling, controlling, or distributing tyre pressure or temperature, specially adapted for mounting on vehicles; Arrangement of tyre inflating devices on vehicles, e.g. of pumps or of tanks; Tyre cooling arrangements
- B60C23/02—Signalling devices actuated by tyre pressure
- B60C23/04—Signalling devices actuated by tyre pressure mounted on the wheel or tyre
- B60C23/0491—Constructional details of means for attaching the control device
- B60C23/0498—Constructional details of means for attaching the control device for rim attachments
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q1/00—Details of, or arrangements associated with, antennas
- H01Q1/12—Supports; Mounting means
- H01Q1/22—Supports; Mounting means by structural association with other equipment or articles
- H01Q1/2208—Supports; Mounting means by structural association with other equipment or articles associated with components used in interrogation type services, i.e. in systems for information exchange between an interrogator/reader and a tag/transponder, e.g. in Radio Frequency Identification [RFID] systems
- H01Q1/2241—Supports; Mounting means by structural association with other equipment or articles associated with components used in interrogation type services, i.e. in systems for information exchange between an interrogator/reader and a tag/transponder, e.g. in Radio Frequency Identification [RFID] systems used in or for vehicle tyres
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q1/00—Details of, or arrangements associated with, antennas
- H01Q1/27—Adaptation for use in or on movable bodies
- H01Q1/32—Adaptation for use in or on road or rail vehicles
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q1/00—Details of, or arrangements associated with, antennas
- H01Q1/27—Adaptation for use in or on movable bodies
- H01Q1/32—Adaptation for use in or on road or rail vehicles
- H01Q1/3208—Adaptation for use in or on road or rail vehicles characterised by the application wherein the antenna is used
- H01Q1/3233—Adaptation for use in or on road or rail vehicles characterised by the application wherein the antenna is used particular used as part of a sensor or in a security system, e.g. for automotive radar, navigation systems
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q1/00—Details of, or arrangements associated with, antennas
- H01Q1/27—Adaptation for use in or on movable bodies
- H01Q1/32—Adaptation for use in or on road or rail vehicles
- H01Q1/325—Adaptation for use in or on road or rail vehicles characterised by the location of the antenna on the vehicle
- H01Q1/3291—Adaptation for use in or on road or rail vehicles characterised by the location of the antenna on the vehicle mounted in or on other locations inside the vehicle or vehicle body
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q11/00—Electrically-long antennas having dimensions more than twice the shortest operating wavelength and consisting of conductive active radiating elements
- H01Q11/02—Non-resonant antennas, e.g. travelling-wave antenna
- H01Q11/08—Helical antennas
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q7/00—Loop antennas with a substantially uniform current distribution around the loop and having a directional radiation pattern in a plane perpendicular to the plane of the loop
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q9/00—Electrically-short antennas having dimensions not more than twice the operating wavelength and consisting of conductive active radiating elements
- H01Q9/04—Resonant antennas
- H01Q9/16—Resonant antennas with feed intermediate between the extremities of the antenna, e.g. centre-fed dipole
Definitions
- the present invention relates to a state detection device, and more particularly to a state detection device that transmits a detection result to the outside by radio waves and is used by being mounted on a metal surface such as a rim in a tire.
- a tire condition detection device equipped with a radio that transmits air pressure data on a tire rim well (see, for example, Patent Document 1).
- the antenna provided in the tire condition detection device is affected by the approach of a metal part such as a rim, and the characteristics often change greatly.
- the antenna design with the tire condition detection device installed on a metal such as a rim It was essential.
- the resonance frequency of the antenna of the tire condition detection device often shifts significantly, so in order to maintain good antenna characteristics, It was necessary to design an antenna for each rim shape on a one-by-one basis.
- the present inventor aims to provide a tire condition detection device that can obtain good antenna characteristics even when the shape of a rim to be mounted is changed, can reduce manufacturing costs, and can be mass-produced.
- a tire condition detection device disclosed in Japanese Patent No. 4868192 Patent Document 2 has been devised.
- the tire condition detection device 10 includes a sensor 410 for detecting a predetermined physical condition of the tire, an antenna 450 having a predetermined resonance frequency, and information on the detection result of the sensor 410 as an antenna.
- a detection / transmission / reception circuit 400 that transmits as a radio wave from 450, and a case 130 that houses the apparatus main body 30 in which the sensor 410, the antenna 450, the detection / transmission / reception circuit 400, and the like are formed and transmits the radio wave. Used by attaching to the rim 4 in the tire.
- the tire state detection device 10 includes a device main body 30 including printed wiring boards 351 and 352 fixed to a case 130 inside the case, and an antenna 450 is provided fixed to one surface side of the printed wiring board 351.
- the detection / transmission / reception circuit 400 is fixed in a state where it is electrically insulated from the antenna 450 at a predetermined distance from the antenna 450 so as to form a boundary surface between the antenna 450 and the rim 4 when mounted on the antenna 450.
- a flat conductor 361 set to a potential equal to the reference potential is provided, and the flat conductor 361 is arranged so that the other surface of the printed wiring board 351 and one surface of the flat conductor 361 are parallel to each other with a predetermined distance D therebetween.
- This is fixed to the printed wiring board 351 by a plurality of holding members 371 so as to form a predetermined space between the other surface of the substrate 351 and one surface of the flat conductor 361.
- the antenna 450 is a coiled antenna whose resonance frequency is set to the transmission / reception frequency of the transmission / reception unit, and the printed wiring provided on the printed wiring board 351, the printed wiring provided on the printed wiring board 352, and the printed wiring board 351.
- the printed wiring and the printed wiring of the printed wiring board 352 are conductively connected and are formed by columnar connecting conductors 354 that fix the printed wiring boards 351 and 352 to each other.
- the feeding conductors 461a, 461b, 461c Connected by 462.
- the planar conductor 361 set to the reference potential of the detection circuit is provided at the position of the predetermined distance D from the antenna 450 in the apparatus, and when the apparatus is mounted on the rim 4, the planar conductor 361 is connected to the antenna 450 and the rim 4. Therefore, the influence of the metal constituting the rim 4 on the antenna 450 can be greatly reduced as compared with the prior art. Therefore, good antenna characteristics can be obtained even if the shape of the rim 4 to be mounted is changed, manufacturing costs can be reduced, and mass production becomes possible.
- JP 2006-327460 A Japanese Patent No. 4868192
- the antenna 450 is an extremely small antenna and has a narrow frequency bandwidth. It has been discovered that when the resonance frequency of 450 is shifted, the transmission / reception frequency is outside the frequency band of the antenna, the matching state between the transmission / reception unit and the antenna 450 is deteriorated, and the performance is deteriorated. In such a case, the size of the antenna has to be finely adjusted, but the fine adjustment has been troublesome.
- the present invention provides a sensor for detecting a predetermined physical quantity in the surroundings, a first printed wiring board and a second printed wiring board provided to face each other, and the first printed wiring board.
- a plurality of antenna printed wirings formed, a plurality of antenna printed wirings formed on the second printed wiring board, an antenna printed wiring formed on the first printed wiring board, and an antenna printed formed on the second printed wiring board A plurality of connecting conductors that form a coiled antenna having a predetermined resonance frequency by connecting wiring, and physical quantity information formed on the first printed wiring board and detected by the sensor as radio waves from the coiled antenna
- the plane conductor is parallel to the plane of the second printed wiring board and the plane of the plane conductor. And fixed to the second printed wiring board by a plurality of holding materials so as to form a predetermined space between the surface of the second printed wiring board and the surface of the planar conductor. It suggests that state detecting device.
- the planar conductor set at the reference potential of the detection circuit is provided at a predetermined distance from the antenna in the device, and when the device is mounted on a metal surface, the planar conductor is connected to the antenna and the metal. Since it becomes a boundary surface between surfaces, the influence which a metal surface gives to an antenna can be reduced significantly compared with the past.
- the case when the state detection device is mounted on a metal surface, the case is fixed to the metal surface so that the bottom surface of the case faces the metal surface. Since the case is fixed to the metal surface in this way, a plane conductor set at a reference potential is arranged between the antenna and the metal surface. Therefore, when the state detection device is mounted on the metal surface, the plane conductor is Since it becomes a boundary surface between an antenna and a metal surface, the influence which a metal surface gives to an antenna can be reduced significantly compared with the past. Therefore, there is no need to create an antenna with optimal characteristics for each shape of the metal surface such as a tire rim, and the same antenna can be used when fixing to a metal surface of any shape.
- the manufacturing cost per tire condition detecting device can be greatly reduced as compared with the conventional one, and mass production of the tire condition detecting device can be easily performed. Furthermore, the frequency band of the antenna can be made wider than the conventional example so that the transmission / reception frequency falls within the frequency band of the antenna even if the resonance frequency of the antenna is slightly shifted.
- the figure which shows the tire structure in one Embodiment of this invention. 1 is an external perspective view showing a tire condition detection device in one embodiment of the present invention.
- Side surface sectional drawing which shows the tire condition detection apparatus in one Embodiment of this invention 1 is an external perspective view showing an apparatus main body according to an embodiment of the present invention.
- 1 is an external perspective view showing an apparatus main body according to an embodiment of the present invention.
- 1 is an external perspective view showing a main part of an apparatus main body according to an embodiment of the present invention.
- the figure which shows the positional relationship of the conductor for electric power feeding and planar conductor board in one Embodiment of this invention 1 is an external perspective view showing a planar conductor plate and a holding material in one embodiment of the present invention. 1 is an external perspective view showing a holding material in an embodiment of the present invention.
- the figure which shows the Smith chart in one Embodiment of this invention The figure which shows the relationship between the power efficiency with respect to input impedance and VSWR in one Embodiment of this invention.
- Smith chart explaining antenna characteristics when appropriate in the conventional example Smith chart explaining variation in antenna characteristics in conventional example Side surface sectional view showing a tire condition detection device in a conventional example External perspective view showing an apparatus main body in a conventional example External perspective view showing an apparatus main body in a conventional example
- the figure which shows the positional relationship of the conductor for electric power feeding and a planar conductor board in a prior art example The figure which shows the example which applied the state detection apparatus of this invention to the pneumatic fender
- FIG. 1 is a diagram showing a tire mounted with a tire condition detection device according to one embodiment of the present invention
- FIG. 2 is a diagram showing a tire structure in one embodiment of the present invention
- FIG. 3 is a tire condition in one embodiment of the present invention.
- FIG. 4 is a plan view showing a tire condition detecting device in one embodiment of the present invention
- FIG. 5 is a side sectional view showing the tire condition detecting device in one embodiment of the present invention
- FIG. 7 is an external perspective view showing an apparatus main body according to an embodiment of the present invention
- FIG. 8 is an external perspective view showing an essential part of the apparatus main body according to an embodiment of the present invention
- FIG. 9 is a tire according to an embodiment of the present invention.
- It is a block diagram which shows the electric system circuit of a state detection apparatus. In the figure, the same components as those in the conventional example are represented by the same reference numerals.
- the tire condition detection device 100 in the present embodiment is fixed at a predetermined position of the rim 4 inside the air chamber 3 of the tire 1, and will be described later provided in the tire condition detection device 100.
- the pressure and temperature in the air chamber 3 of the tire main body 2 are detected by a sensor unit including a pressure detecting element and a temperature detecting element, and the detection result is converted into a digital value. Further, the tire condition detection device 100 generates and transmits digital information including these digital values. This digital information includes identification information unique to the tire condition detection device 100 in addition to the digital value of the detection result.
- the tire 1 used in the present embodiment is a tire used for a large truck or the like, and a steel carcass is embedded in the tire 1.
- the tire used in this embodiment is normally used for a large vehicle, and has a steel belt and a steel carcass embedded therein.
- the tire 1 is a known tubeless radial tire, for example, and includes a wheel and a rim in the present embodiment. 1 and 2, the tire 1 includes a tire body 2, a rim 4 and a wheel 5.
- the tire body 2 includes a known cap tread 21, under tread 22, belts 23A and 23B, carcass 24, and the like. .
- the case 130 of the tire condition detection device 100 has a substantially rectangular parallelepiped shape, has protrusions for screwing at both ends in the longitudinal direction, and the case main body 131 and the lid 132. It consists of and.
- a storage space 134 for storing the apparatus main body 300 is formed inside the case main body 131, and the opening of the storage space 134 is formed by fixing the lid 132 to the case main body 131 with screws 141. Closed.
- a vent hole 133 is formed in the lid body 132, and even when the lid body 132 is fixed to the case main body 131, air can flow from the outside to the storage space 134 through the vent hole 133. Yes.
- the apparatus main body 300 includes two printed wiring boards 351 and 352 having a substantially rectangular shape arranged in parallel at a predetermined interval, and a columnar connection constituting an antenna 450 therebetween.
- the conductor 354 and the third printed wiring board 353 for connection are fixed to each other.
- a coil-shaped antenna 450 having a central axis extending in the width direction of the first and second printed wiring boards 351 and 351 is formed at the other end portion in the longitudinal direction of the apparatus main body 300, and the sensor portion 410 and the battery are disposed at one end side.
- Electronic components that constitute an electronic circuit including 420 are mounted.
- the connecting printed wiring board 353 is soldered to each of the two printed wiring boards 351 and 352.
- the first printed wiring board 351 and the second printed wiring board 352 are provided between them, and fix the other printed wiring board to the one printed wiring board at a predetermined interval, and The printed wiring and the printed wiring of the other printed wiring board are connected by a plurality of columnar connecting conductors 354 that are conductively connected.
- a detection / transmission / reception circuit 400 shown in FIG. 9 is formed on the first printed wiring board 351 of the apparatus main body 300. That is, the detection / transmission / reception circuit 400 includes a sensor unit 410, a battery 420, a main control unit 430, a transmission / reception unit 440, and an antenna 450.
- the sensor unit 410 is mounted on the surface of the main body 300, and includes an air pressure detection element 411, a temperature detection element 412, and an analog / digital conversion circuit 413.
- the air pressure detection element detects the air pressure and temperature in the tire air chamber. 411 and the temperature detection element 412, and the detection result is converted into a digital value by the analog / digital conversion circuit 413 and output to the main control unit 430.
- the battery 420 is fixed to the surface of the second printed wiring board 352, connected to the apparatus main body 300 by a connection conductor, and supplies power to the detection / transmission / reception circuit 400 formed on the first printed wiring board 351.
- the main control unit 430 includes a well-known CPU and memory, receives the detection result from the sensor unit 410 as a digital value, generates digital information including the digital value, and outputs the digital information to the transmission / reception unit 440.
- the digital information includes identification information unique to the apparatus main body 300 that has been set in advance (which has been previously written in a memory or set by a dip switch). It is.
- the transmission / reception unit 440 switches between transmission and reception based on an instruction from the main control unit 430.
- the digital information input from the main control unit 430 is transmitted from the antenna 450 with a predetermined frequency, for example, 315 MHz, and at the time of reception.
- a digital signal is detected from the 315 MHz radio wave received via the antenna 450, digital information is extracted from the detected digital signal, and is output to the main control unit 430.
- the transmission frequency and the reception frequency of the transmission / reception unit 440 are set to the same frequency.
- input / output terminals 441 and 442 connected to the antenna 450 of the transmission / reception unit 440 are formed on the first printed wiring board 351.
- the antenna 450 is a coiled antenna whose resonance frequency is set to the transmission / reception frequency of the transmission / reception unit 440, and the printed wiring 351a provided on the first printed wiring board 351 and the printed wiring 352a provided on the second printed wiring board 352.
- the printed wiring of the first printed wiring board 351 and the printed wiring of the second printed wiring board 352 are conductively connected and formed by columnar connecting conductors 354 that fix the printed wiring boards 351 and 352 to each other.
- the feeding conductors 451a, 451b, 451c, 452 are conductively connected.
- a rectangular planar conductor plate 361 is fixed to the outer surface of the other end of the second printed wiring board 352 by four holding members 371.
- a planar conductor plate 361 is provided at the position of the antenna 450 so as to be parallel to the printed wiring board 352 located on the bottom surface side of the case body 131 when the apparatus body 300 is housed in the case 130.
- the flat conductor plate 361 is fixed to the second printed wiring board 352 by the holding material 371 so as to maintain a predetermined distance D.
- the planar conductor plate 361 is conductively connected to a predetermined conductor pattern (a conductor pattern connected to the negative electrode of the battery 420) of the second printed wiring board 352 and set to a reference potential. Further, as shown in FIG.
- the holding member 371 is fixed to the four corners of the planar conductor plate 361. As shown in FIG. 12, the holding member 371 has a shape in which cylindrical projections 371b having a diameter smaller than that of the main body 371a are provided at both ends of the cylindrical main body 371a.
- the planar conductor plate 361 is disposed so as to form a boundary surface between the antenna 450 and the rim 4 when the case 130 of the tire condition detection device 100 is attached to the rim 4.
- the directivity of the transmission radio wave at this time is as shown in FIG.
- the antenna 450 has a resonance frequency of 315 MHz with the planar conductor plate 361 mounted on the second printed wiring board 352, and the antenna impedance at 315 MHz is 50 ohms. At this time, the distance D between the printed wiring board 351 and the planar conductor plate 361 is set to 1.5 mm by the holding material 371.
- FIG. 15 shows the impedance characteristics of the tire condition detection device 100 in this embodiment
- FIG. 16 shows the power efficiency (Pin / Pout) and the VSWR characteristics with respect to the input impedance of the antenna 450.
- the characteristic curve A represents the outer periphery of the range where the input impedance Z1 of the antenna 450 is 25 ⁇ ⁇ Z1 ⁇ 100 ⁇ .
- a characteristic curve B is an impedance curve in the present embodiment, and represents that the input impedance Z1 of the antenna 450 is 25 ⁇ ⁇ Z1 ⁇ 100 ⁇ between the frequency 316 MHz at the point B1 and the frequency 314.5 MHz at the point B2. .
- a characteristic curve C is an impedance curve in the conventional example, and represents that the input impedance Z1 of the antenna is 25 ⁇ ⁇ Z1 ⁇ 100 ⁇ between the frequency 315.5 MHz at the point C1 and the frequency 314.5 MHz at the point C2. . Therefore, in this embodiment, it can be seen that the frequency band where the input impedance Z1 of the antenna 450 is 25 ⁇ ⁇ Z1 ⁇ 100 ⁇ is expanded by 0.5 MHz compared to the conventional example.
- curve P represents power efficiency
- curve S represents VSWR.
- the case 130 is attached to the rim 4 so that the bottom surface of the case 130 faces the surface of the rim 4. Since the case 130 is fixed to the rim 4 in this manner, the planar conductor plate 361 set at the reference potential is disposed between the antenna 450 and the surface of the rim 4, so that the tire
- the planar conductor plate 361 becomes an interface between the antenna 450 and the rim 4, so that the influence of the metal constituting the rim 4 on the antenna 450 is significantly larger than before. Can be reduced.
- the second printed wiring board 352 facing the first printed wiring board 351. Since the plane conductor plate 361 is fixed and the plane conductor plate 361 is disposed away from the input / output terminals 441 and 442 connected to the antenna 450 of the transmission / reception unit 440, the frequency band where the input impedance Z1 of the antenna 450 is 25 ⁇ ⁇ Z1 ⁇ 100 ⁇ . However, it increased by 0.5 MHz compared with the conventional example.
- the planar conductor plate 361 is arranged at a position away from the input / output terminals 441 and 442 of the transmission / reception unit 440, thereby connecting the antenna 450 of the transmission / reception unit 440. This is probably because the stray capacitance formed between the output terminals 441 and 442 and the planar conductor plate 361 is reduced.
- the manufacturing cost can be greatly reduced as compared with the conventional one, and mass production of the tire condition detection device can be easily performed. Furthermore, since the frequency band in which the input impedance Z1 of the antenna 450 is 25 ⁇ ⁇ Z1 ⁇ 100 ⁇ is wider than that of the conventional example, fine adjustment of the antenna is not necessary even if the resonance frequency of the antenna is slightly shifted.
- the tire state detection device 100 that can detect both the air pressure and the temperature in the tire is configured, but an information acquisition device that can detect either the air pressure or the temperature or another physical quantity is also configured. good.
- the state detection device configured to detect the physical quantity in the tire while using the rim in the tire as the metal surface to be mounted is configured, but the state in which the surrounding physical quantity is detected by mounting on a metal surface other than the tire It goes without saying that the same effect can be obtained when the detection apparatus is configured.
- the state detection device of the present invention can reduce the influence on the antenna characteristics not only from the tire rim but also from the surrounding casing, it can be used for other purposes.
- the air pressure inside the pneumatic fender 5 used when a ship is berthed or touched to a quay or another ship is also detected by the sensor of the state detection device 100, The detection value is transmitted to a place away by radio waves using the state detection device 100, and this is received and applied to the one in which the internal air pressure can be monitored without touching the pneumatic fender 5 it can.
- Sensor unit 411 ... Air pressure detection element, 412 ... Temperature detection element, 413 ... Analog / digital conversion circuit, 420 ... battery, 421, 422 ... connection conductor, 430 ... main control unit, 440 ... transmission / reception unit, 441, 442 ... input / output terminal, 450 ... antenna, 451, 452 ... feeding point, 461a, 461b, 461c, 462 ... feeding conductor.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Remote Sensing (AREA)
- Computer Security & Cryptography (AREA)
- Radar, Positioning & Navigation (AREA)
- Arrangements For Transmission Of Measured Signals (AREA)
- Measuring Fluid Pressure (AREA)
- Details Of Aerials (AREA)
Abstract
Description
Claims (3)
- 周囲の所定物理量を検出するセンサと、面対向して設けられた第1プリント配線基板及び第2プリント配線基板と、前記第1プリント配線基板に形成された複数のアンテナプリント配線及び第2プリント配線基板に形成された複数のアンテナプリント配線と、前記第1プリント配線基板に形成されたアンテナプリント配線と第2プリント配線基板に形成されたアンテナプリント配線とを連結して所定の共振周波数を有するコイル状アンテナを形成する複数の連結導体と、前記第1プリント配線基板に形成され前記センサによって検出された物理量の情報を前記コイル状アンテナから電波として送信する送信回路と、前記第1プリント配線基板に設けられた前記送信回路の出力端子と、前記アンテナの給電点と前記出力端子とを導電接続する導電体と、前記第1プリント配線基板及び第2プリント配線基板を収納し且つ電波を透過するケースと、前記ケースを金属面に装着したときに前記アンテナと前記金属面との間に境界面を形成するように前記アンテナから所定距離の位置に前記アンテナと電気的に絶縁された状態で固定され且つ前記送信回路の基準電位と等しい電位に設定されている平面導体とを備え、前記ケースを前記金属面に装着して用いる状態検出装置において、
前記平面導体は前記第2プリント配線基板の面と前記平面導体の面が所定の間隔を開けて平行になるように且つ前記第2プリント配線基板の面と前記平面導体の面との間に所定の空間を形成するように複数の保持材によって前記第2プリント配線基板に固定されている
ことを特徴とする状態検出装置。 - 前記コイル状アンテナの軸が前記平面導体の面と平行に設定されていることを特徴とする請求項1に記載の状態検出装置。
- 前記コイル状アンテナの前記軸方向の長さLと、前記送信回路の送信周波数の波長λとの関係においてL/λの値が0.25以下となるように前記長さLが設定されている
ことを特徴とする請求項1又は請求項2に記載の状態検出装置。
Priority Applications (6)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP13803961.5A EP2863479A4 (en) | 2012-06-13 | 2013-05-13 | STATUS DETECTION DEVICE |
CN201380031169.7A CN104919653A (zh) | 2012-06-13 | 2013-05-13 | 状态检测装置 |
US14/407,900 US20150122005A1 (en) | 2012-06-13 | 2013-05-13 | State Condition Detection Device |
JP2013552746A JPWO2013187163A1 (ja) | 2012-06-13 | 2013-05-13 | 状態検出装置 |
AU2013275529A AU2013275529B2 (en) | 2012-06-13 | 2013-05-13 | Condition detection device |
KR1020147034864A KR101633750B1 (ko) | 2012-06-13 | 2013-05-13 | 상태 검출 장치 |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2012-133431 | 2012-06-13 | ||
JP2012133431 | 2012-06-13 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2013187163A1 true WO2013187163A1 (ja) | 2013-12-19 |
Family
ID=49757995
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/JP2013/063268 WO2013187163A1 (ja) | 2012-06-13 | 2013-05-13 | 状態検出装置 |
Country Status (7)
Country | Link |
---|---|
US (1) | US20150122005A1 (ja) |
EP (1) | EP2863479A4 (ja) |
JP (1) | JPWO2013187163A1 (ja) |
KR (1) | KR101633750B1 (ja) |
CN (1) | CN104919653A (ja) |
AU (1) | AU2013275529B2 (ja) |
WO (1) | WO2013187163A1 (ja) |
Families Citing this family (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2012073973A1 (ja) * | 2010-12-02 | 2012-06-07 | 横浜ゴム株式会社 | 情報取得装置を備えたタイヤ |
JP6992052B2 (ja) * | 2017-03-31 | 2022-01-13 | 株式会社ヨコオ | アンテナ装置 |
WO2019244349A1 (ja) * | 2018-06-22 | 2019-12-26 | 横浜ゴム株式会社 | 空気入りタイヤおよびアセンブリシート |
JP7350984B2 (ja) * | 2019-08-05 | 2023-09-26 | ブリヂストン アメリカズ タイヤ オペレーションズ、 エルエルシー | タイヤ電子機器アセンブリ |
Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2006074627A (ja) * | 2004-09-03 | 2006-03-16 | Neomax Co Ltd | バーアンテナ |
JP2006327460A (ja) | 2005-05-27 | 2006-12-07 | Sanyo Electric Co Ltd | タイヤ空気圧警報システム |
JP4868192B2 (ja) | 2009-09-01 | 2012-02-01 | 横浜ゴム株式会社 | タイヤ状態検出装置 |
WO2012073973A1 (ja) * | 2010-12-02 | 2012-06-07 | 横浜ゴム株式会社 | 情報取得装置を備えたタイヤ |
Family Cites Families (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
KR100691162B1 (ko) * | 2005-05-16 | 2007-03-09 | 삼성전기주식회사 | 직교 헬리컬 안테나 |
CN201417818Y (zh) * | 2009-03-18 | 2010-03-03 | 深圳市麦捷微电子科技股份有限公司 | 一种片式多层射频天线 |
CN201576738U (zh) * | 2009-08-27 | 2010-09-08 | 杭州物网科技有限公司 | 基于折叠缝隙天线的超高频射频识别标签天线 |
JP5716891B2 (ja) * | 2010-11-10 | 2015-05-13 | 横浜ゴム株式会社 | 情報取得装置 |
-
2013
- 2013-05-13 WO PCT/JP2013/063268 patent/WO2013187163A1/ja active Application Filing
- 2013-05-13 AU AU2013275529A patent/AU2013275529B2/en not_active Ceased
- 2013-05-13 US US14/407,900 patent/US20150122005A1/en not_active Abandoned
- 2013-05-13 KR KR1020147034864A patent/KR101633750B1/ko active IP Right Grant
- 2013-05-13 EP EP13803961.5A patent/EP2863479A4/en not_active Withdrawn
- 2013-05-13 CN CN201380031169.7A patent/CN104919653A/zh active Pending
- 2013-05-13 JP JP2013552746A patent/JPWO2013187163A1/ja active Pending
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2006074627A (ja) * | 2004-09-03 | 2006-03-16 | Neomax Co Ltd | バーアンテナ |
JP2006327460A (ja) | 2005-05-27 | 2006-12-07 | Sanyo Electric Co Ltd | タイヤ空気圧警報システム |
JP4868192B2 (ja) | 2009-09-01 | 2012-02-01 | 横浜ゴム株式会社 | タイヤ状態検出装置 |
WO2012073973A1 (ja) * | 2010-12-02 | 2012-06-07 | 横浜ゴム株式会社 | 情報取得装置を備えたタイヤ |
Non-Patent Citations (1)
Title |
---|
See also references of EP2863479A4 * |
Also Published As
Publication number | Publication date |
---|---|
AU2013275529A1 (en) | 2015-01-29 |
EP2863479A1 (en) | 2015-04-22 |
KR20150008187A (ko) | 2015-01-21 |
US20150122005A1 (en) | 2015-05-07 |
JPWO2013187163A1 (ja) | 2016-02-04 |
EP2863479A4 (en) | 2016-03-02 |
CN104919653A (zh) | 2015-09-16 |
AU2013275529B2 (en) | 2016-02-04 |
KR101633750B1 (ko) | 2016-07-08 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
US8988207B2 (en) | Information acquiring device | |
EP1976714B1 (en) | Tire monitor system having tire valve antenna | |
US7215244B2 (en) | Transmitter for tire condition monitoring apparatus | |
WO2013187163A1 (ja) | 状態検出装置 | |
EP2474429B1 (en) | Tire-state detection device | |
WO2019241118A1 (en) | Methods of measuring tire tread thickness using dual sensors and/or differential measurement and related monitoring systems | |
US8818301B2 (en) | Transmission device | |
EP1775146B1 (en) | Tire condition monitoring device | |
WO2019191246A1 (en) | Structures and methods providing sensor-package integration | |
US20190001764A1 (en) | Tire pressure monitoring unit | |
WO2023032187A1 (ja) | アンテナユニットおよび送信機 | |
US20210206210A1 (en) | Tire monitor sensor and tire monitor system for a vehicle | |
TWM572982U (zh) | Tire pressure monitoring system | |
WO2023032186A1 (ja) | 無給電素子 | |
WO2016031878A1 (ja) | 送信装置 |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
ENP | Entry into the national phase |
Ref document number: 2013552746 Country of ref document: JP Kind code of ref document: A |
|
121 | Ep: the epo has been informed by wipo that ep was designated in this application |
Ref document number: 13803961 Country of ref document: EP Kind code of ref document: A1 |
|
ENP | Entry into the national phase |
Ref document number: 20147034864 Country of ref document: KR Kind code of ref document: A |
|
WWE | Wipo information: entry into national phase |
Ref document number: 14407900 Country of ref document: US |
|
NENP | Non-entry into the national phase |
Ref country code: DE |
|
WWE | Wipo information: entry into national phase |
Ref document number: IDP00201500183 Country of ref document: ID |
|
ENP | Entry into the national phase |
Ref document number: 2013275529 Country of ref document: AU Date of ref document: 20130513 Kind code of ref document: A |