GB2098430A - Apparatus for transmitting and metering a measurand from a displaceable object to an object which is stationary relative thereto - Google Patents
Apparatus for transmitting and metering a measurand from a displaceable object to an object which is stationary relative thereto Download PDFInfo
- Publication number
- GB2098430A GB2098430A GB8201421A GB8201421A GB2098430A GB 2098430 A GB2098430 A GB 2098430A GB 8201421 A GB8201421 A GB 8201421A GB 8201421 A GB8201421 A GB 8201421A GB 2098430 A GB2098430 A GB 2098430A
- Authority
- GB
- United Kingdom
- Prior art keywords
- transmitter
- oscillator circuit
- stage
- receiver
- frequency
- 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.)
- Granted
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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
- B60C23/0422—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
- B60C23/0427—Near field transmission with inductive or capacitive coupling means
- B60C23/0428—Near field transmission with inductive or capacitive coupling means using passive wheel mounted resonance circuits
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- 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
- B60C23/0427—Near field transmission with inductive or capacitive coupling means
- B60C23/043—Near field transmission with inductive or capacitive coupling means using transformer type signal transducers, e.g. rotary transformers
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01D—MEASURING NOT SPECIALLY ADAPTED FOR A SPECIFIC VARIABLE; ARRANGEMENTS FOR MEASURING TWO OR MORE VARIABLES NOT COVERED IN A SINGLE OTHER SUBCLASS; TARIFF METERING APPARATUS; MEASURING OR TESTING NOT OTHERWISE PROVIDED FOR
- G01D5/00—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable
- G01D5/12—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable using electric or magnetic means
- G01D5/243—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable using electric or magnetic means influencing the phase or frequency of ac
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06K—GRAPHICAL DATA READING; PRESENTATION OF DATA; RECORD CARRIERS; HANDLING RECORD CARRIERS
- G06K7/00—Methods or arrangements for sensing record carriers, e.g. for reading patterns
- G06K7/0008—General problems related to the reading of electronic memory record carriers, independent of its reading method, e.g. power transfer
-
- G—PHYSICS
- G08—SIGNALLING
- G08C—TRANSMISSION SYSTEMS FOR MEASURED VALUES, CONTROL OR SIMILAR SIGNALS
- G08C17/00—Arrangements for transmitting signals characterised by the use of a wireless electrical link
- G08C17/04—Arrangements for transmitting signals characterised by the use of a wireless electrical link using magnetically coupled devices
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Mechanical Engineering (AREA)
- Artificial Intelligence (AREA)
- Computer Vision & Pattern Recognition (AREA)
- Theoretical Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Arrangements For Transmission Of Measured Signals (AREA)
- Measuring Fluid Pressure (AREA)
Abstract
Apparatus for transmitting and metering a measurand from a transponder (1) positioned on a wheel of a vehicle, an element (2 or 3) of which is raised by the measurand to be measured, the apparatus including a transmitter-receiver oscillator circuit (4) connected to both a transmitter stage (7) and a receiver stage (8). The transmitter stage is controlled from an oscillator (9) and during the transmission phase transmits frequency signals to the transponder (1). The receiver stage comprises a phase detector (11), an evaluation stage (12) and an amplitude monitor (14). During a receiving phase, the phase detector compares the phase of the signals transmitted back from the transponder (1) via the transmitter- receiver oscillator circuit (4) with the reference frequency signals from the oscillator (9). The evaluation stage displays the result of the comparison to indicate the value of the measurand being measured if the level of the received signals is above a given value as determined by the amplitude monitor (14). <IMAGE>
Description
SPECIFICATION
Apparatus for transmitting and metering a measurand from a displaceable object to an object which is stationary relative thereto
The present invention relates to apparatus for transmitting and metering a measurand from a displaceable object to an object which is stationary relative thereto.
In the case of known apparatus, a coupred oscillator circuit associated with a transponder is provided with a switch which, in the event of the air-pressure monitoring of a vehicle wheel, can be opened and closed as a function of the pressure value and either leaves the coupled oscillator circuit in the relatively de-attenuated condition or short-circuits it. With this arrangement it is possible to ascertain with that part of the device located on the chassis of the vehicle whether the air pressure has fallen below a pre-determined value. For this purpose, initially the transmitter stage is effectively switched in such manner that it radiates via the transmitter-receiver oscillator circuit a frequency signal which is received by the coupled oscillator circuit when the latter is located in the vicinity of the transmitter-receiver oscillator circuit.The energy of the frequency signal magnetically coupled with a coil of the coupled oscillator circuit energizes the coupled oscillator circuit to oscillate with its intrinsic frequency when the switch is opened. In the event where the switch is closed, no oscillator occurs in the coupled oscillator circuit. The transmitterreceiver oscillator circuit can now be attenuated by a control arrangement, so that the oscillation still occurring in it subsequent to switching off the transmitter stage very rapidly decays. Thereupon, the transmitter-receiver oscillator circuit with the receiver stage is also effectively connected by the control circuit arrangement.In the event in which the switch of the transponder is opened and consequently a decaying oscillation occurs in the coupled oscillator circuit, this frequency signal is, during the receiving phase, received by the transmitter-receiver oscillator circuit if the latter is in the vicinity of the coupled oscillator circuit. On the other hand, in the case in which the switch is closed in the receiving phase no signal is fed to the transmitter-receiver oscillator circuit. For evaluation of the frequency signal received, the receiver stage may have an electronic meter, the meter input of which is supplied with transformed metering pulses during a pre-set time interval, these being formed from the frequency signal received.Thus, the state of the counter indicates that the switch of the transponder is opened, if within the time duration, a pre-set meter content is reached, whereas on the other hand if the switch in the transponder is closed no metering pulses pass into the meter and a display stage indicates that there is an excessively low pressure. In the case of this known apparatus, it is disadvantageous that only two discreet metering values can be transferred contact-less, i.e.
depending on whether the transponder switch is opened or closed by the measurand.
Another known apparatus for transferring at least one measurand from a displaceable object to an object which is stationary relative thereto includes: a transmitter stage transmitting two transmission signals of varying frequency; at least one coupling element which mixes the two frequencies and which is secured to the displaceable object, and a receiver stage responding to the combined mixed frequency. The coupling element mixing the two frequencies has at least one oscillator circuit comprising an impedance element having a nonlinear currentvoltage characteristic curve. For this purpose there may be provided a diode or a transistor having a short-circuited base collector stage. If the switch of the coupled element is opened, then the impedance element does not supply any frequency signal.If, however, the switch is closed, then the coupled element generates a signal having a frequency corresponding to the difference between the varying frequencies of the transmission signals. The frequency signal representing the difference in frequencies is detected in the receiver stage and evaluated for the control of an alarm display system. When two coupling elements are employed for example per vehicle tyre for transmitting a temperaturedependent and a pressure-dependent signal, a further stage is required in the central unit comprising the transmitter stage and the receiver stage. This further stage effects a comparison of the phase of the receiver signal with that of a reference signal of identical frequency generated in the central unit.Also when employing two coupled elements and the phase comparison stage in the central unit, only the two measurands of the two metering magnitudes are detected and distinguished or differentiated.
According to the present invention there is provided apparatus for transmitting and metering a measurand from a displaceable object to an object which is stationary relative thereto, said apparatus including: a transmitter stage; a reference frequency oscillator connected to the transmitter, to enable the transmitter stage to transmit a frequency signal; a receiver stage comprising a phase detector and means for metering the value of the measurand transmitted; a transmitter-receiver oscillator circuit; means for connecting the transmitter stage and the receiver stage alternately with the transmitter-receiver oscillator circuit; an oscillator circuit arranged on the displaceable object which during at least part of its movement is coupled to the transmitterreceiver oscillator circuit; said oscillator circuit having at least one element which determines the frequency of said oscillator circuit according to the value of the measurand; frequency signals transmitted from the oscillator circuit and received by the receiver, having their phase compared with those of the oscillator associated with the transmitter stage, whereby the output from the phase detector as a result of the phase comparison, energizes the metering means to enable the value of the measurand to be indicated.
The above apparatus can continuously detect measurands of a value to be metered, transfer them contactless and evaluate them in a central unit comprising the transmitter stage and the receiver stage. A preferred feature of the apparatus is the coupled oscillator circuit forming the transponder, the coil of which serves as coupling element and which serves as a continuous measurand transducer converting the magnitude to be metered by varying a parameter of at least one element of the coupled oscillator circuit.
The inductance of the coil of the oscillator circuit may serve as the measurand transducer, the inductance of the coil being varied by the measurand. Alternatively, the capacitance of the capacitor of the oscillator circuit may be varied by the measurand. In both cases, in the event of variation of the measurand, a high value of the coupled oscillator circuit is-maintained, this producing advantageous transmission properties of the coupled oscillator circuit. The measurand transmission pre-requires an at least minimum coupling of the coil of the coupled oscillator circuit and of the transmitter-receiver oscillator circuit, as substantially determined by the spacing between the coils.
In the central unit, the transmitter-receiver oscillator circuit is employed during the transmission phase as an aerial and is subjected to the action of the reference frequency. The frequency of the said frequency signal corresponds preferably to the resonance frequency of th e the transmitter-receiver oscillator circuit. During the transmission phase, there is induced in the coupled oscillator circuit, an oscillation the frequency of which is also equal to the reference frequency and which is phaseshifted relative to the emitted frequency signal. At the end of the transmission phase, the oscillation coupled-into the coupled oscillation circuit and which for its part generates a frequency signal begins to decay, i.e. at a frequency which is equal to the intrinsic frequency of the coupled oscillator circuit.This decaying oscillation has furthermore a pre-determined phase which is a function of the resonance frequency of the coupled oscillator circuit, relative to the originally transmitted difference frequency signal. If the coupled oscillator circuit is located in the vicinity of the transmitter-receiver coupled circuit, the oscillation of the coupled oscillator circuit induces a frequency signal having the same frequency as the decaying oscillation in the coupled oscillation circuit, and being phase-shifted relative thereto.
The transmitter-receiver oscillator circuit is expediently, if it is common both to the transmitter stage and also to the receiver stage, damped for high-speed switch-over from the transmission phase to the receiving phase, between the two phases, so that each oscillation decays in a short time. The oscillation then induced during the receiving phase in the transmitter-receiver oscillator circuit is then expediently amplified in the central unit and evaluated with a phase-detector. This phase metering may be effectively and reliably achieved during a few oscillations of the decaying oscillation, this being especially advantageous with a view to the movement of the coupled oscillator circuit relative to the transmitter receiver oscillator circuit. The phase metering is, as will be shown later, expediently effected as time metering.
In place of the phase metering of the frequency signal coupled-in into the transmitter-receiver oscillator circuit during the receiving phase, and which emerges from the coupled oscillator circuit, it is also possible to alternatively use a frequency meter if the latter is so designed that it can make a reliable frequency metering during a few oscillations.
Both the metering of the decaying oscillation of the coupled oscillator circuit due to phase metering also due to frequency metering has the advantage that the metering result remains substantially uninfluenced by the magnitude of the coupled oscillator circuit which under some circumstances may depend on the built-in conditions at the point of metering, in particular in the vicinity of metal elements.
Advantageously, the apparatus may comprise in the central unit means for amplitude monitoring which do not activate evaluation of the frequency signal in the receiver stage until the amplitude of the frequency signal exceeds a preset value, As a result, no false evaluation occurs if the coupled oscillator circuit is located too far from the transmitter-receiver oscillator circuit to make possible a reliable statement with regard to the phase-position or frequency of the frequency signal received. Apart therefrom, the frequency signal radiated-back from the coupled oscillator circuit induces in the stationary transmitterreceiver oscillator circuits, oscillation which does not increase until during the swing-in procedure of the transmitter-receiver circuit, and which then decreases exponentially to correspond to the oscillation in the coupled oscillator circuit.
Thereby, there is produced in the receiving phase a short interval of time during which the frequency signal received has a maximum magnitude. During this interval of time extending over some periods, the sensitivity of the device and the metering reliability is at a maximum.
Advantageously the apparatus for the evaluation of the frequency signal received may comprise a phase detector in the receiver stage, for metering the time difference in the case of a pre-determined period of the reference frequency between a zero passage of the reference frequency and a following zero passage of the frequency signal received by the receiver stage which is induced due to the oscillation in the coupled oscillator circuit. This metering can be advantageously carried into effect during a period of the received frequency signal. In this connection, it is advantageous that the metering may take place independently of supplementary external time or frequency signals. Rather, all the time signals in the central unit can be derived by dividers from a single oscillator.
An advantageous embodiment of the evaluation circuit arrangement for evaluation of the ascertained time difference may include a voltage integrator in the form of a resistorcapacitor combination fed with a constant current.
In a modified form, the apparatus comprises a phase detector means metering the time difference between zero passages of the reference frequency and of the received frequency signal via a plurality of periods, but as a whole also via a comparatively short interval of time.
The present invention will now be described in greater detail by way of example with reference to the accompanying drawings, wherein: In Figure 1 a block circuit diagram of one preferred form of apparatus operating in accordance with the principle of metering the time difference at a pre-determined period; and
Figure 2 is a block circuit diagram of the apparatus in which metering of the frequency signal received takes place with a frequency meter.
Referring first to Figure 1 the apparatus includes a transponder 1 the coupled oscillation circuit of which comprises a coil 2 and a capacitor 3. Due to the design of the coil or the capacitor which acts as a metering transducer, the resonance frequency of the transponder 1 is continuously varied to correspond to the value to be metered. The transponder 1 is secured to a displaceable element, by way of example to the wheel of a road vehicle.
In the zone of movement of the transponder 1, there is located on a stationary element, a transmitter-receiver oscillator circuit 4 including a coil 5 and a capacitor 6. The transmitter-receiver oscillator circuit 4 either receives from a transmitter stage 7 a signal of a given frequency, or transmits a received signal of a given frequency to a receiver stage 8.
Both the transmitter stage 7 and also the receiver stage 8 are associated with a central unit comprising an oscillator 9 for generating a reference frequency and a control circuit 10.
The oscillator 9 feeds both the control circuit 10 and also the transmitter stage 7 and a phase detector 11 in the receiver stage 8. The output of the phase detector 11 in the receiver stage 8 is supplied to an evaluation circuit 12.
The transmitter stage 7, a damping stage 13 for damping the transmitter-receiver oscillator circuit 4 and the phase detector 11 receive control signals from the control circuit 10.
Similarly, an amplitude monitor 14 receives a control signal from the control circuit 10. The circuit 14 is also supplied with an output from the transmitter-receiver oscillator circuit 4 and transmits a control signal to the evaluation circuit 12.
This circuit arrangement operates in such manner that during a transmission phase the transmitter stage 7 transmits the reference frequency from the oscillator 9 to the transmitterreceiver oscillator circuit 4 which thereupon energizes the transponder 1 if the latter is located in the vicinity of the transmitter-receiver oscillator 4. After energization of the transponder 1 during the damping phase, the oscillations induced in the transmitter-receiver oscillator circuit 4 will decay.
If the transponder 1 is in the vicinity of the transmitter-receiver oscillator circuit 4, then it induces during the receiving phase in the transmitter-receiver oscillating circuit, an alternating signal which corresponds to the intrinsic frequency of the coupled oscillator circuit comprising the coil 2 and the capacitor 3, the frequency of which signal corresponds to the measurand.
In the receiver stage 8, metering takes place in such manner that the phase detector 11 is energized by a control signal "phase-meteringactivation", which is transmitted from the control circuit 10. Thus, the phase detector 11 meters during a pre-determined period the time difference to the next flank of the reference frequency signal, for example during zero passage and the corresponding flank of the received frequency signal. The time signal is converted in the evaluation circuit 12 to an analog voltage if the amplitude monitor 14 signals an amplitude of the frequency signal received which is adequate for reliable metering. The conversion of the time differential into an analog voltage can be effected by charging a capacitor in a resistor-capacitor circuit by a constant current.The voltage of the capacitor is then further conducted via a scanning circuit.
According to this metering principle, during one cycle which includes the transmission phase, the damping phase and the receiving phase (pulse period), the metering of the transponder 1 takes place in order to determine the measurand.
The time difference between the zero passages relating to a pre-determined Nth period (reference frequency) amounts to:
wherein (AT)N is, the time difference between the zero passages of the reference frequency fr and the frequency signal fk, and 0, is a constant phase displacement of the voltage induced in the transmitter-receiver oscillator circuit 4 relative to the reference frequency.
Referring now to the device shown in Figure 2, identical circuit components have been given identical reference numerals. To the extent that the frequency metering involves variation of the structural groups shown in Figure 1, the reference numerals have been changed. This applies to the reference oscillator 9' to the control circuit 10' and to the evaluation circuit 12'. The apparatus shown in Figure 2 includes a frequency meter 1 6 for determining the frequency of the signal received by the transmitter-receiver oscillator circuit 4, the frequency of which is equal to that of the intrinsic frequency of the coupled oscillator circuit which forms the transponder 1. The frequency signal is output from the transmitterreceiver oscillator circuit 4 during the receiving phase, via an amplifier 15, to the frequency meter 1 6. The frequency meter 1 6 also receives a reference frequency from the reference frequency oscillator 9'.
The frequency can be metered via one or more signal periods of the frequency signal.
Claims (13)
1. Apparatus for transmitting and metering a measurand from a displaceable object to an object which is stationary relative thereto, said apparatus including: a transmitter stage: a reference frequency oscillator connected to the transmitter, to enable the transmitter stage to transmit a frequency signal; a receiver stage comprising a phase detector and means for metering the value of the measurand transmitted; a transmitter-receiver oscillator circuit; means for connecting the transmitter stage and the receiver stage alternately with the transmitter-receiver oscillator circuit; an oscillator circuit arranged on the displaceable object which during at least part of its movement is coupled to the transmitterreceiver oscillator circuit said oscillator circuit having at least one element which determines the frequency of said oscillator circuit according to the value of the measurand; frequency signals transmitted from the oscillator circuit and received by the receiver, having their phase compared with those of the oscillator associated with the transmitter stage, whereby the output from the phase detector as a result of the phase comparison, energizes the metering means to enable the value of the measurand to be indicated.
2. Apparatus according to claim 1, wherein the oscillator circuit includes an inductance variable by the measurand.
3. Apparatus according to claim 1 , wherein the oscillator circuit includes a capacitance variable by the measurand.
4. Apparatus according to any one of the preceding claims wherein there are provided means for monitoring the amplitude in order to prevent the energization of the metering means in the receiver stage until the amplitude of the frequency signal exceeds a predetermined value.
5. Apparatus according to any one of the preceding claims including a control circuit arrangement which, in the event of a predetermined number of reference frequency pulses from the oscillator which are applied to both the control circuit arrangement and the phase detector, causes the transmitter stage to transmit the frequency signals during a transmission phase, the phase detector metering the time difference between the next zero passage of the reference oscillation and the next zero passage of the frequency signal received by the receiver stage during a receiving phase during a period.
6. Apparatus according to claim 5, wherein the metering means comprises an evaluation circuit arrangement which converts the time difference to an analog voltage.
7. Apparatus according to claim 5 wherein the evaluation circuit includes a voltage integrator which is energized during the time difference ascertained by the phase detector and which is connected with a scanning circuit for subsequent scanning of the integrated voltage value.
8. Apparatus according to any one of the preceding claims 1 to 4, including a control circuit arrangement which, during a first number and following thereon a second number of reference frequency pulses which are applied to both the control circuit arrangement and the phase detector, causes the transmitter stage to transmit the frequency signals during a transmission phase, the phase detector metering the time differences between the next zero passage of the reference oscillation and the next zero passage of the frequency signal received by the receiver stage during a receiving phase, whereby the metering means indicates the subtraction of the time differences by conversion into an analog voltage.
9. Apparatus according to claim 8 wherein the metering means includes two voltage integrators which, during in each particular instance one of the two time differences ascertained by the phase detector are energized and are connected to a voltage subtraction circuit.
1 0. Apparatus according to any one of the preceding claims, additionally including means for damping either the transmitter stage or the receiver stage.
1 Apparatus for transmitting and metering a measurand from a displaceable object to an object which is stationary relative thereto, said apparatus including: a transmitter stage; a reference frequency oscillator connected to the transmitter, to enable the transmitter stage to transmit a frequency signal; a receiver stage comprising a frequency meter and means for metering the value of measurand transmitted; a transmitter-receiver oscillator circuit; means for connecting the transmitter stage and the receiver stage alternately with the transmitter-receiver oscillator circuit; an oscillator circuit arranged on the displaceable object which during at least part of its movement is coupled to the transmitterreceiver oscillator circuit, said oscillator circuit having at least one element which determines the frequency of said oscillator circuit according to the value of the measurand; frequency signals transmitted from the oscillator circuit and received by the receiver, having their frequency compared with that of the oscillator associated with the transmitter stage, whereby the output from the frequency meter as a result of the frequency comparison, energizes the metering means to enable the value of the measurand to be indicated.
12. Apparatus according to claim 11, wherein an amplifier is provided between the transmitterreceiver oscillator circuit and the frequency meter.
13. Apparatus for transmitting and metering a measurand from a displaceable object to an object which is stationary relative thereto, constructed and arranged to operate substantially as herein described with reference to and as illustrated in Fig. 1 or Fig. 2 of the accompanying drawings.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE19813107947 DE3107947A1 (en) | 1981-03-02 | 1981-03-02 | DEVICE FOR TRANSMITTING A MEASURED VALUE FROM A MOVING OBJECT TO A RELATIVE TO THIS FIXED OBJECT |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| GB2098430A true GB2098430A (en) | 1982-11-17 |
| GB2098430B GB2098430B (en) | 1985-09-04 |
Family
ID=6126180
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB8201421A Expired GB2098430B (en) | 1981-03-02 | 1982-01-19 | Apparatus for transmitting and metering a measure and from a displaceable object which is stationary relative thereto |
Country Status (4)
| Country | Link |
|---|---|
| JP (1) | JPS57157396A (en) |
| DE (1) | DE3107947A1 (en) |
| FR (1) | FR2500926B1 (en) |
| GB (1) | GB2098430B (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5054315A (en) * | 1987-12-18 | 1991-10-08 | Compagnie Generale Des Etablissements Michelin-Michelin & Cie | Coding of the value of several quantities measured in a tire |
| WO2002040331A1 (en) * | 2000-11-17 | 2002-05-23 | Transense Technologies Plc | Method of and device for acquiring data of dynamic physical processes via a radio link |
| EP1876945B1 (en) * | 2005-03-04 | 2012-12-05 | CardioMems, Inc. | Communicating with an implanted wireless sensor |
Families Citing this family (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3330519C2 (en) * | 1983-08-24 | 1986-09-04 | Weck, Manfred, Prof. Dr.-Ing., 5100 Aachen | Method and device for the contactless transmission of a signal from a rotating component to a stationary component |
| EP0276335A1 (en) * | 1987-01-24 | 1988-08-03 | Allied Corporation | Environmental indicator device and method |
| EP0261353A3 (en) * | 1986-09-24 | 1989-02-01 | Grapha-Holding Ag | Measuring unit |
| DE3922556C3 (en) * | 1989-07-08 | 1994-09-15 | Gabriele Manner | Arrangement for contactless energy and sensor signal transmission |
| DE4005396A1 (en) * | 1990-02-21 | 1991-08-22 | Bayerische Motoren Werke Ag | Measurement signal communication device for motor vehicle - performs optical, transfer between rotary and fixed transfer parts with pre-transfer amplification |
| DE4007838A1 (en) * | 1990-03-12 | 1991-09-19 | Dittel Walter Gmbh | DEVICE FOR TOUCH DETECTION |
| DE4033053C1 (en) * | 1990-10-18 | 1992-03-05 | Hottinger Baldwin Messtechnik Gmbh, 6100 Darmstadt, De | |
| FR2710144A1 (en) * | 1993-09-13 | 1995-03-24 | Bouzaglo Henri | Sensor for deformation of the tyre of the wheel of a motor vehicle |
| EP0901417B1 (en) * | 1996-05-29 | 2002-02-27 | IQ-Mobil Electronics GmbH | Device for wireless transmission from moving parts |
| DE19631425A1 (en) * | 1996-08-06 | 1998-02-12 | Wolf & Beck Gmbh Dr | Identification method for interchangeable accessories of machines tools |
| FR2862751B1 (en) * | 2003-11-21 | 2006-03-03 | Roulements Soc Nouvelle | SYSTEM AND METHOD FOR DETERMINING AT LEAST ONE PARAMETER OF AT LEAST ONE ROTATING ORGAN BY MEANS OF REFERENCE AND SPEED SIGNALS |
Family Cites Families (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CA1020631A (en) * | 1974-03-04 | 1977-11-08 | Edward I. Parker | Control and gauging method and apparatus using locked oscillators |
| GB1543155A (en) * | 1975-05-02 | 1979-03-28 | Nat Res Dev | Transponders |
| SE400385B (en) * | 1976-01-28 | 1978-03-20 | Nordstjernan Rederi Ab | PROCEDURE FOR SENSING IN A SWINGING SYSTEM IN A METHODER SENSING THE SWITCH STATE OF THE SYSTEM AND DEVICE FOR PERFORMING THE PROCEDURE |
| JPS52110682A (en) * | 1976-03-15 | 1977-09-16 | Konsorideetetsudo Furaitoueizu | Method of and apparatus for measuring air pressure in pneumatic tire |
| JPS5374079A (en) * | 1976-12-14 | 1978-07-01 | Bridgestone Tire Co Ltd | Device for warning pressure reducing of inner pressure of tire |
| DE2854199A1 (en) * | 1978-12-15 | 1980-06-26 | Vdo Schindling | DEVICE FOR TRANSMITTING MEASURED VALUES |
| FR2485192A1 (en) * | 1980-06-19 | 1981-12-24 | Telecommunications Sa | METHOD AND DEVICE FOR MEASURING PRESSURE OF TIRES, IN PARTICULAR FOR AIRCRAFT |
-
1981
- 1981-03-02 DE DE19813107947 patent/DE3107947A1/en active Granted
- 1981-11-03 FR FR8120584A patent/FR2500926B1/en not_active Expired
-
1982
- 1982-01-19 GB GB8201421A patent/GB2098430B/en not_active Expired
- 1982-02-26 JP JP2914782A patent/JPS57157396A/en active Granted
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5054315A (en) * | 1987-12-18 | 1991-10-08 | Compagnie Generale Des Etablissements Michelin-Michelin & Cie | Coding of the value of several quantities measured in a tire |
| AU619793B2 (en) * | 1987-12-18 | 1992-02-06 | Compagnie Generale Des Etablissements Michelin - Michelin & Cie | Coding the value of several quantities measured in a tyre |
| WO2002040331A1 (en) * | 2000-11-17 | 2002-05-23 | Transense Technologies Plc | Method of and device for acquiring data of dynamic physical processes via a radio link |
| US7026977B2 (en) | 2000-11-17 | 2006-04-11 | Transense Technologies Plc | Method of and apparatus for acquiring data of dynamic physical processes via a radio link |
| EP1876945B1 (en) * | 2005-03-04 | 2012-12-05 | CardioMems, Inc. | Communicating with an implanted wireless sensor |
Also Published As
| Publication number | Publication date |
|---|---|
| FR2500926B1 (en) | 1986-06-27 |
| JPH0318234B2 (en) | 1991-03-12 |
| FR2500926A1 (en) | 1982-09-03 |
| DE3107947A1 (en) | 1982-09-16 |
| GB2098430B (en) | 1985-09-04 |
| DE3107947C2 (en) | 1990-10-25 |
| JPS57157396A (en) | 1982-09-28 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| 746 | Register noted 'licences of right' (sect. 46/1977) | ||
| PCNP | Patent ceased through non-payment of renewal fee |
Effective date: 19940119 |