EP0235237A1 - Generateur d'alimentation electrique pour un circuit electronique - Google Patents

Generateur d'alimentation electrique pour un circuit electronique

Info

Publication number
EP0235237A1
EP0235237A1 EP19860905389 EP86905389A EP0235237A1 EP 0235237 A1 EP0235237 A1 EP 0235237A1 EP 19860905389 EP19860905389 EP 19860905389 EP 86905389 A EP86905389 A EP 86905389A EP 0235237 A1 EP0235237 A1 EP 0235237A1
Authority
EP
European Patent Office
Prior art keywords
wheel
electronic circuit
dynamo
generator according
stator
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
EP19860905389
Other languages
German (de)
English (en)
Inventor
Luis Maria Antonello
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Individual
Original Assignee
Individual
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Individual filed Critical Individual
Publication of EP0235237A1 publication Critical patent/EP0235237A1/fr
Withdrawn legal-status Critical Current

Links

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
    • B60C23/041—Means for supplying power to the signal- transmitting means on the wheel
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K7/00—Arrangements for handling mechanical energy structurally associated with dynamo-electric machines, e.g. structural association with mechanical driving motors or auxiliary dynamo-electric machines
    • H02K7/18—Structural association of electric generators with mechanical driving motors, e.g. with turbines
    • H02K7/1807—Rotary generators
    • H02K7/1846—Rotary generators structurally associated with wheels or associated parts

Definitions

  • This invention relates to a device designed to monitor air pressure in motor vehicle tires, which operates during the time the motor vehicle is in motion.
  • this invention refers to the part of the device that has the function of converting the air pressure information into electrical signals and transmit these signals from the vehicle wheel, and it further refers to the supply of electric power to said part.
  • Each said part of the device is designed to be attached to one wheel of the vehicle so that it will be revolving, that is to say moving with respect to the vehicle body. For that reason, supplying power to said moving part presents considerable problems, since connecting it to the car battery would require the use of a commutator-and-brush assembly which would obviously be too complicated. It is therefore desirable that the moving part of the monitoring device, which includes a transducer, a transmitter, as well as the electric power supply to both, be mounted independent of the vehicle body.
  • independent is being used to imply the absence of any type of connection whether electrical or of any other type, with the vehicle body and, in particular, with the battery.
  • This invention physically comprises a dynamo mounted integral and coaxial with the car wheel axle; the dynamo includes two assemblies, mutually free to rotate and identified as the dynamo stator and rotor, one of which is integral coaxially with the wheel axle and the other consists of a flywheel of appreciable mass revolving about said axle, as well as a field coil having the function of generating the electrical energy necessary for the above mentioned power supply.
  • the electric power generator described in the preceding paragraph is intended to be used with a motor vehicle tire air pressure monitoring device, it can be used as well to supply power to any type electric or electronic circuits mounted on a rotating shaft.
  • Figure 1 is a perspective view of a motor vehicle with a sketch of the monitoring device to which the power generator according to this invention is applied.
  • Figure 2 is a block diagram illustrating the principle of operation of said monitoring device.
  • Figure 3 is a cross-section view of a motor vehicle wheel with the power generator attached to the wheel rim.
  • FIG. 4 is a detailed cross-section view of one embodiment of the power generator according to this invention, and the location of the monitoring device transducer and transmitter printed circuit boards.
  • Figure 5 is a detailed cross-section view of a second embodiment of the power generator according to this invention, and the location of the monitoring device transducer and transmitter printed circuit boards.
  • Figure 1 shows a motor vehicle 11 comprised of a body 13 and wheels 15, the number of wheels ranging from a minimum of four such as in a sedan or jeep type of vehicle, to six or more such as in a carrier used for transporting goods or passengers.
  • a monitoring device composed of moving or external parts 17 attached to each wheel 15, and a stationary or internal part 19 located inside body 13 of vehicle 11.
  • the stationary part 19 terminates with an alarm device consisting of display 21 mounted on panel 23 inside the passeneger compartment 25 of vehicle 13.
  • the moving part 17 is connected through a tube or hose 27 to a chuck 29 located on the tire or cover 31 of each wheel 15; chuck 29 contains a valve which is conventionally used to inflate tire 31.
  • the chuck 29 and tube 27 assembly allows the passage of air defined as air pressure inlet to the monitoring device 17, 49.
  • display 21 contains as many indicator lights 33 as are wheels 15, which have the dual function of warning the driver, while the vehicle is in motion, of a low pressure condition in any tire 31 and indicating which tire 31 is in that condition.
  • moving part 17 senses the air pressure value in the tire to which it is attached to send a corresponding signal to stationary part 19.
  • the signal originated by the moving part is of binary type i.e. it indicates either normal or insufficient air pressure in tire 31.
  • FIG. 2 a block diagram of the pneumatic pressure monitoring device is provided in Figure 2.
  • the monitoring device is composed of a moving or external part 17 and a stationary or internal part 19, the terms “moving” and “stationary” being in this case used with respect to the driver of motor vehicle 11 or to the vehicle body 13.
  • Moving part 17 includes a pressure transducer or converter pressure gage (P/V) 35 which receives pressurised air from tire 31 through tube 27 and converts said pressure value into a binary electric parameter, namely an electric voltage.
  • P/V pressure transducer or converter pressure gage
  • transducer 35 will provide an ON signal through output 37 only in the case the pressure value detected is within a predetermined threshold equivalent to tire 31 normal pressure range.
  • transducer 35 may simply consist of a switch which would sense the air pressure in tube 27 and would close when pressure is within the normal range to l et pass an ON si gnal that wi l l enabl e osci l l ator 39.
  • Oscillator 39 will generate a radio frequency signal when pressure in tire 31 is normal, and viceversa, it will not produce any signal when pressure is low, especially when tire 31 gets deflated.
  • the oscillator 39 signal is fed into a code modulator circuit 41 having the function of modulating the signal output by oscillator 39 in a code that will permit later identification cf wheel 15 location in vehicle 11.
  • Said modulation and coding process may be of the type 1 nown as PCM, in which modulation is applied by a pulse train and a code is generated according to pulse amplitude or repetition frequency.
  • the modulated and coded signal output from circuit 41 is applied to a transmitting amplifier (TX) 43 which adapts its amplitude level and sends it to a transmitting antenna 45.
  • TX transmitting amplifier
  • components 35, 39, 41, 43 of moving part 17 of the monitoring device are fed with electric power generated by generator (GEN) 49 through a supply line 47.
  • Generator 49 is the main component of this invention and will be described in detail in later paragraphs.
  • the stationary part 19 of the monitoring device includes a receiving antenna able to receive- the radio frequency signal emitted by transmitting antenna 45 and connected to the input of a receiver 53.
  • Antenna 51 may either be connected by means of individual cables to be run up to the fender relevant to each wheel 15, or it may be a single antenna located on panel 23 containing display 21.
  • the latter solution though requiring greater output power from transmitter 43, would make it easier to install stationary part 19 in vehicle 11, since it would only be a matter of installing some modules.
  • Receiver 53 amplifies and demodulates the input signal that indicates the pneumatic pressure value in one of wheels 15, and sends that signal to a decoder (DEC) 55.
  • the decoder 55 output is connected to display 21 through a harness 57 of cables which are individually connected to a.s many indicator lights 33.
  • Indicator lights 33 can consist of LEDs arranged in a geometric configuration r ⁇ produicing that of wheels 15 of motor vehicle 11, thus making it easier to identify the wheel 15 corresponding to the indicator light 33.
  • Components 21, 53, 55 of stationary part 19 are powered through another power supply line 59 connected to battery 61 of motor vehicle 11.
  • the radioelectric signal is transmitted during the time pneumatic pressure is normal and alarm 21 is activated when no such radioelectric signal is transmitted.
  • the signal is transmitted continually, and transmission stops as soon as pressure gage 35 senses a low pressure condition. Thanks to this feature, any failure of the monitoring device 17, 19 to generate, transmit, and receive the pressure value signal can be immediately detected, since the alarm is activated by the absence of signal caused by such a circuit failure.
  • Figure 3 is a cross-section view taken along the diameter of one front or rear wheel 15 of motor vehicle 11, comprising tire 31 mounted on rim 63 which is attached integral with rotating axle 65.
  • Axle 65 conventionally carries a hub 66 to which rim 63 is attadnec by mean s of a set of bolts and nuts 67.
  • the moving part 17 of the monitoring device is contained in a housing 69 which is attached concentric with rim 63 by means of the same sat of bolts and nuts 67.
  • Hose 27 projects from housing 69 and terminates with a sealed threaded fitting 70 attached to chuck 29 in place of the nipple normally used on a conventional wheel 15.
  • Fitting 70 contains a needle (not shown) which pushes chuck 29 center pin to open the valve of tire 31 and transmit pressure to transducer gage 35. That completes the installation of part 17 of the monitoring device, including generator 49 according to this invention, whose evident advantage is that it does not require any modification whatsoever to wheel 15 components. In addition to the advantage of not having to modify in any way wheel 15 conventional components, the fact that device 17 is mounted by utilising the same nut 67 as used for attaching rim 63 to hub 66, will allow providing part 17 with a theft protection for wheel 15 at no additional cost, by using a special nut with locknut currently available on the market, to protect wheel 15 against said risk.
  • Figure 4 is a detailed view of housing 69 containing part 17, according to a first embodiment of this invention.
  • Housing 69 consists of a base 71 and a cover 73 on both of which holes are drilled in line with each other and with bolts 67 of wheel 15.
  • generator 49 consists of a direct current motor contained in casing 77.
  • Casing 77 mounts a circular support 79 secured to base 71 by means of screws 81,
  • the direct current generator 49 is aligned coaxially with axle 65 so that casing 77 will rotate together with wheel 15.
  • Generator 49 includes a rotating shaft 83 projecting from casing 77, on which is mounted a flywheel 85, also contained in housing 69.
  • casing 77 together with the stator assembly of generator 49 rotates at the same speed as wheel 15 while vehicle 11 moves on; whereas flywheel 85 slips with respect to the rotary motion of wheel 15 since rotating shaft 83 is mounted idle on axle 65 of wheel 15.
  • the slipping ⁇ f flywheel 85 is due to the fact that its inertia makes it rotate at a considerably lower angular speed than that of axle 65.
  • flywheel 85 should practically stand still with respect to vehicle body 13 for the purpose of increasing generator 49 output power; however, the flywheel is drawn to rotate because of friction in the bearings that support rotating shaft 83 and, essentially, because of the electromagnetic coupling between the rotor and stator of generator 49.
  • there are two kinds of opposing forces acting upon flywheel 85 one force being generated bysaid electromagnetic coupling which tends to cause wheel 15 to draw flywheel 85 to a rotary motion, and the other force being originated by flywheel 85 inertia which counteracts said rotary motion.
  • Flywheel 85 should desirably have an appreciable mass in order to increase its moment of inertia, hence its checking action, as well as to increase t he slipping motion and maximising the generator 49 output power.
  • Figure 5 is a cross-section view taken along the diameter of a detail of a second preferred embodiment of generator 49 according to this invention.
  • dynamo 49 is provided with a flat stator consisting of a field coil 93 wound about a stator plate 95.
  • a coil 93 has several turns of extremely reduced thickness, of the order of the diameter of the wire used for winding coil 93, which results in considerably smaller size of housing 69 and, therefore, reduced size of the portion of the device projecting from rim 63 ( Figure 3).
  • the dynamo 49 rotor includes a permanent magnet 97 adhering to flywheel 85, in which a recess has been machined to accommodate magnet 97 so that its outer surface be flush with that of flywheel 85.
  • Both the dynamo 49 and printed circuit boards 87 are mounted on a supporting sleeve 79' fastened to base 71 of housing 69 by means of screws 81', the same as stator plate 95 is fastened to supporting sleeve 79'.
  • Printed circuit boards 87 can be mounted directly using long screws 89' and appropriate spacers to attach them to stator plate 95.
  • Rootating shaft 83 is mounted inside supporting sleeve 79' and kept in place by means of two bearings 99 suitable to allow it to rotate freely with respect to axle 65 with which it is aligned coaxially.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Power Engineering (AREA)
  • Connection Of Motors, Electrical Generators, Mechanical Devices, And The Like (AREA)

Abstract

Dans un générateur électrique destiné à alimenter un circuit électronique indépendant de transmission d'une pression pneumatique, monté sur une roue d'un véhicule à moteur, ou d'autres applications nécessitant une alimentation électrique d'un circuit électronique indépendant monté sur un arbre rotatif, une dynamo (49) comprend deux assemblages se déplaçant l'un par rapport à l'autre, l'un d'eux étant le stator et l'autre le rotor de la dynamo, le premier de ces assemblages étant solidaire de l'arbre rotatif (65) et coaxial par rapport à ce dernier et le second assemblage mobile consistant en un volant (85) d'une masse appréciable et tournant autour dudit arbre rotatif. La dynamo comporte une bobine de champ connectée à un point d'entrée d'alimentation dudit circuit électronique.
EP19860905389 1985-09-03 1986-09-03 Generateur d'alimentation electrique pour un circuit electronique Withdrawn EP0235237A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
AR301492 1985-09-03
AR30149285 1985-09-03

Publications (1)

Publication Number Publication Date
EP0235237A1 true EP0235237A1 (fr) 1987-09-09

Family

ID=3478340

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19860905389 Withdrawn EP0235237A1 (fr) 1985-09-03 1986-09-03 Generateur d'alimentation electrique pour un circuit electronique

Country Status (2)

Country Link
EP (1) EP0235237A1 (fr)
WO (1) WO1987001527A1 (fr)

Families Citing this family (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2658759A1 (fr) * 1990-02-28 1991-08-30 Labinal Dispositif a alimentation locale de surveillance de pneumatique de roue de vehicule.
CA2211657A1 (fr) * 1996-07-29 1998-01-29 Kevin Patrick Austin Pearman Detecteur de degonflement d'un pneu
NL1006450C1 (nl) * 1997-07-02 1999-01-05 Pedro De Smit Detectiesysteem voor het detecteren van een verminderde gasdruk in een band van een voertuig, en een detectie-eenheid voor toepassing daarin.
US7081693B2 (en) * 2002-03-07 2006-07-25 Microstrain, Inc. Energy harvesting for wireless sensor operation and data transmission
US7256505B2 (en) 2003-03-05 2007-08-14 Microstrain, Inc. Shaft mounted energy harvesting for wireless sensor operation and data transmission
EP2829727B1 (fr) * 2013-07-22 2018-09-05 Iveco France S.A.S. Véhicule pour le transport de passagers comprenant au moins un essieu possédant des roues externes comprenant un appareil de récupération d'énergie
EP2829728B1 (fr) * 2013-07-22 2018-06-27 Iveco France S.A.S. Véhicule pour le transport de passagers comprenant au moins un essieu possédant des roues externes comprenant un appareil de récupération d'énergie
CN104965210A (zh) * 2015-07-08 2015-10-07 北京玛施德利科技有限公司 动能gps跟踪器
US12059930B1 (en) * 2017-07-31 2024-08-13 Aperia Technologies, Inc. System and method for automatic pressure management

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4075603A (en) * 1976-10-04 1978-02-21 Gould Inc. Apparatus and method for indicating condition of a rotating body
FR2393227A1 (fr) * 1977-05-31 1978-12-29 Snecma Montage d'une machine tournante sur un arbre moteur
US4536668A (en) * 1982-09-13 1985-08-20 Boyer Robert E Vehicle mountable electrical generating system
US4539497A (en) * 1983-04-11 1985-09-03 Boyer Robert E Electrical generator with ring housing mountable on a wheel assembly

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO8701527A1 *

Also Published As

Publication number Publication date
WO1987001527A1 (fr) 1987-03-12

Similar Documents

Publication Publication Date Title
US4539497A (en) Electrical generator with ring housing mountable on a wheel assembly
US4536668A (en) Vehicle mountable electrical generating system
US5285189A (en) Abnormal tire condition warning system
US4160234A (en) Abnormal tire condition sensing system
US4075603A (en) Apparatus and method for indicating condition of a rotating body
KR101388177B1 (ko) 유도 전력 소스를 갖춘 타이어 파라미터 모니터링 시스템
CN204586699U (zh) 汽车车轮雷达
JPH029964B2 (fr)
EP0235237A1 (fr) Generateur d'alimentation electrique pour un circuit electronique
US4300120A (en) Tire pressure monitor
EP1445125A2 (fr) Appareil de surveillance de condition de pneumatique
US20180301035A1 (en) Bicycle notification device including attaching portion transmitter and power generator
CA2273174A1 (fr) Dispositif de controle de la pression de pneus montes sur des automobiles, au moyen d'un circuit alimente par une batterie
EP1587696A1 (fr) Generateur de puissance monte sur roues
CN210273751U (zh) 集成式电机的编码器装置
EP0832764A3 (fr) Dispositif de détection de dégonflement d'un pneumatique
CN101259820A (zh) 无源汽车轮胎预警系统
JP2001151090A (ja) アンチロックブレーキ装置
JP3687385B2 (ja) 発電装置及びこれを用いたタイヤ内圧検出装置
KR102085006B1 (ko) 자가 발전 장치
JPH08301175A (ja) 無接点式信号伝送装置
JP2007008206A (ja) タイヤ空気圧監視システム
EP0864450B1 (fr) Arrangement d'un générateur de courant intégré à un palier
GB2243010A (en) Fluidic pressure loss warning system
CN215621219U (zh) 一种带有自充电装置的汽车胎压蓝牙传感器

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

AK Designated contracting states

Kind code of ref document: A1

Designated state(s): AT BE CH DE FR GB IT LI LU NL SE

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: THE APPLICATION IS DEEMED TO BE WITHDRAWN

18D Application deemed to be withdrawn

Effective date: 19870605