EP0596240A1 - Dispositif pour la transmission de valeurs de mesure par une liaison vertio à haute fréquence - Google Patents

Dispositif pour la transmission de valeurs de mesure par une liaison vertio à haute fréquence Download PDF

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Publication number
EP0596240A1
EP0596240A1 EP93115404A EP93115404A EP0596240A1 EP 0596240 A1 EP0596240 A1 EP 0596240A1 EP 93115404 A EP93115404 A EP 93115404A EP 93115404 A EP93115404 A EP 93115404A EP 0596240 A1 EP0596240 A1 EP 0596240A1
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EP
European Patent Office
Prior art keywords
receiver
transmitter
transmitters
channel
measured values
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
Application number
EP93115404A
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German (de)
English (en)
Other versions
EP0596240B1 (fr
Inventor
Jürgen Dipl.-Ing. Anlauf
Michael Dipl.-Ing. Fellhauer
Gerhard Dipl.-Ing. Haaga
Johannes Prof.Dr.-Ing. Gerstlauer
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.)
Robert Bosch GmbH
Original Assignee
Robert Bosch GmbH
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Filing date
Publication date
Application filed by Robert Bosch GmbH filed Critical Robert Bosch GmbH
Publication of EP0596240A1 publication Critical patent/EP0596240A1/fr
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Publication of EP0596240B1 publication Critical patent/EP0596240B1/fr
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    • G—PHYSICS
    • G08—SIGNALLING
    • G08C—TRANSMISSION SYSTEMS FOR MEASURED VALUES, CONTROL OR SIMILAR SIGNALS
    • G08C15/00—Arrangements characterised by the use of multiplexing for the transmission of a plurality of signals over a common path
    • G08C15/02—Arrangements characterised by the use of multiplexing for the transmission of a plurality of signals over a common path simultaneously, i.e. using frequency division
    • G08C15/04—Arrangements characterised by the use of multiplexing for the transmission of a plurality of signals over a common path simultaneously, i.e. using frequency division the signals being modulated on carrier frequencies

Definitions

  • the invention relates to a device for the transmission of measured values via a radio-frequency radio link according to the preamble of the main claim.
  • a test device for motor vehicles which uses a device for the transmission of measured values via a radio frequency (RF) radio link.
  • RF radio frequency
  • a stationary diagnostic device contains a receiver which is tuned to a channel corresponding to the RF channel of the transmitter.
  • the receiver contains a device for separating the measured values sent one after the other, which can then be processed separately.
  • a transmitter is assigned to each sensor.
  • the stationary diagnostic device must have a number of different receivers corresponding to the number of transmitters, each of which must be matched to the RF channels corresponding to the transmitters assigned to them.
  • the invention is based on the object of specifying a simple device for the transmission of measured values via an HF radio link which enables sufficiently fast measured value transmission with a low outlay on equipment.
  • the device according to the invention for the transmission of measured values via an HF radio connection has the advantage that only two separate receivers are provided which cooperate with a large number of transmitters.
  • the different transmitters radiate the measured values simultaneously on predeterminable different RF channels.
  • a first receiver which is provided for cooperation with at least two transmitters, is tuned in chronological order to the RF channels corresponding to the transmitters. With this measure, a large number of measured values are available in succession in chronological order. The maximum possible transmission rate decreases with an increase in the number of transmitters. So that at least one measured value with a high transmission rate is nevertheless available, at least one second receiver is provided which interacts with another transmitter which emits the measured value required with a high transmission rate. The second receiver is tuned to an RF channel corresponding to the other transmitter.
  • the transmitter and the two receivers each have a pre-selection option for the HF channel.
  • This measure increases the availability of the device according to the invention in that, for example, in the case of a faulty RF channel or, for example, in the case of an RF channel that has already been found, another channel can be selected.
  • switching means are assigned to the transmitters for specifying an RF channel.
  • the selection of the RF channels of the transmitters takes place from the reception side, for which the RF channels have already been preselected.
  • a simple embodiment provides a galvanic connection, which is implemented, for example, by means of a plug connection.
  • an electromagnetic near-field coupling is provided, which works, for example, by means of a transformer coupling, inductive components being arranged on the receiver and on the transmitter side, via which the coupling preferably takes place via a magnetic near field.
  • the device according to the invention is particularly suitable for use in motor vehicle diagnosis.
  • the most varied measured values are related to at least one other measured value.
  • a reference measured value is, for example, the speed.
  • the speed must therefore be transmitted at a high transmission rate so that real-time measurement processing is possible.
  • the transmitter that emits the speed measurement value then interacts with the second receiver, which is tuned to a fixed RF channel.
  • a preferred use of the device according to the invention is given in a brake pressure measuring system in which the transmission of a reference pressure is required.
  • the reference pressure is preferably tapped at a brake pressure coupling head.
  • a device according to the invention for the transmission of measured values via an HF radio link manure is shown in the figure.
  • a transmitter 10 is shown in the upper part of the figure and a receiving device 11 is shown in the lower part which is separated by dashed lines.
  • the transmitter 10 emits a high-frequency signal via an antenna 12 which is generated in a transmission stage 13.
  • the emitted high-frequency signal is modulated by means of a modulator 14 with the measured value output by a sensor 15.
  • the transmission stage 13 contains an RF channel selector 16 which receives input signals from an input 17 and / or from a plug connection 18 and / or from a first part 19 of an electromagnetic near field coupling 20.
  • the receiving device 11 contains an antenna 21 which emits a received signal to a first receiver 22 and to a second receiver 23.
  • the signal processing arrangement 26 contains an RF channel specification 27, which in each case emits signals to the RF channel selector 24, 25.
  • the signal processing arrangement 26 also outputs signals to a plug connection 28 and / or to a second part 29 of the electromagnetic near field coupling 20 and to a display 30.
  • the arrangement 26 receives a signal from an input device 31.
  • the RF channel specification 27 receives a signal from a timer arrangement 32.
  • input 17 can be provided, for example, which contains switching means, preferably a series of miniature slide switches.
  • the plug connection 18 is provided, which interacts with a suitable counterpart, the plug connection 28.
  • the electromagnetic near field coupling 20 is provided.
  • the electromagnetic near field coupling 20 provides for wireless signal transmission via the electrical and / or the magnetic near field of electromagnetic radiation. The use of the magnetic near field is particularly suitable.
  • the first part 19 and the second part 29 of the electromagnetic near-field coupling 20 are provided for coupling, which therefore preferably each contain inductive elements. When brought together, the inductive elements form a loosely coupled transformer.
  • the high-frequency energy emitted by the transmitters 10 via antennas 12 is received by the antenna 21 of the receiving device 11 and fed to the two receivers 22, 23.
  • Both receivers each contain an RF channel selector 24, 25, which are also preferably each implemented as a frequency synthesizer.
  • the RF channel specification 27 is provided, which is arranged in the signal-processing arrangement 26 on the receiver side.
  • the selection of the RF channels and the assignment of the channels to the individual transmitters 10 is preferably carried out via the input device 31.
  • the signals output by the input device 31 are forwarded in the signal processing arrangement 26 to the RF channel specification 27, which signals are suitable for controlling the RF signals.
  • Channel selector 24, 25 generated.
  • the first receiver 22 is tuned to at least two different RF channels in chronological order, which is predetermined by the timer arrangement 32.
  • the transmission rate for the individual measured values decreases. If at least one measured value is to be recorded which has to be transmitted at a high transmission rate, the measurement task can no longer be solved with the first receiver 22.
  • the second receiver 23 is provided, which at least during the measurement gangs is constantly tuned to the specified high-frequency channel, via which the measured value is transmitted, which is required with a high transmission rate. If more than one such measured value with a high transmission rate is required, the device according to the invention can be supplemented by further receivers 23, which are permanently set to an RF channel during the measurement process.
  • the signal processing arrangement 26 With the information provided by the input device 31, it is possible for the signal processing arrangement 26 to provide the corresponding signals for HF channel selection at the plug connection 28 and / or the second part 29 of the electromagnetic near field coupling 20.
  • the individual transmitters 10 can then be tuned to the desired RF channels either one after the other via the plug-in connection 18, 28 or via the electromagnetic near-field coupling 20.
  • the second receiver 23 also preferably contains, in addition to an RF input part, also a demodulator which outputs the measured value to the signal processing arrangement 26.
  • the arrangement 26 can be used as a diagnostic device which carries out the desired processing of the measured values and outputs it, for example, via the display 30.
  • the device according to the invention is particularly suitable for use in motor vehicle diagnosis.
  • the particular advantage here is that a previously required cabling effort and the risk of incorrect adaptation resulting therefrom is reduced. In addition, the risk of accidents caused by cables lying around in the workshop is considerably reduced.
  • Another advantage of this use is the use of HF properties.
  • the transmission frequency of the transmitters 10 will preferably be in the megahertz or gigahertz range. These comparatively high transmission frequencies on the one hand enable a high signal transmission rate and on the other hand the use of antennas 12, 21 which have a high degree of efficiency.
  • the dimensions of the antennas 12, 21 may well be in the range of the wavelengths used. A possibly occurring directivity of the antennas 12, 21 for the radiated or received RF energy and the associated disadvantage that location-dependent field strength fluctuations occur, is weakened by the reflections within the workshop building.
  • a preferred application is in a brake pressure measuring system.
  • the brake pressures of the individual axles must be measured together with a reference pressure.
  • the reference pressure occurs, for example, on the brake coupling head.
  • This reference pressure is transmitted with a transmitter 10 which is tuned to an RF channel to which the second receiver 23 in the receiving device 11 is also tuned. The reference pressure is therefore always available for the comparison of the individual recorded pressure values.
  • different measured values have to be related, for example, to the speed of an internal combustion engine.
  • the speed signal is then always available for processing the individual measured values in chronological order.

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Arrangements For Transmission Of Measured Signals (AREA)
  • Monitoring And Testing Of Transmission In General (AREA)
EP93115404A 1992-10-31 1993-09-24 Dispositif pour la transmission de valeurs de mesure par une liaison vertio à haute fréquence Expired - Lifetime EP0596240B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE4236923A DE4236923A1 (de) 1992-10-31 1992-10-31 Vorrichtung zur Übertragung von Meßwerten über eine Hochfrequenz-Funkverbindung
DE4236923 1992-10-31

Publications (2)

Publication Number Publication Date
EP0596240A1 true EP0596240A1 (fr) 1994-05-11
EP0596240B1 EP0596240B1 (fr) 2000-06-21

Family

ID=6471883

Family Applications (1)

Application Number Title Priority Date Filing Date
EP93115404A Expired - Lifetime EP0596240B1 (fr) 1992-10-31 1993-09-24 Dispositif pour la transmission de valeurs de mesure par une liaison vertio à haute fréquence

Country Status (4)

Country Link
EP (1) EP0596240B1 (fr)
DE (2) DE4236923A1 (fr)
ES (1) ES2148196T3 (fr)
GR (1) GR3034333T3 (fr)

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2290631B (en) * 1994-06-24 1998-11-11 Fuji Heavy Ind Ltd Diagnosis system for motor vehicle and the method thereof
DE19523352C1 (de) * 1995-06-27 1996-10-10 Reinhausen Maschf Scheubeck Anordnung zur Stromüberwachung
DE19602817A1 (de) * 1996-01-26 1997-07-31 Bayerische Motoren Werke Ag Fahrzeug mit einem mobilen Transponder
DE19650047A1 (de) * 1996-12-03 1998-06-04 Bayerische Motoren Werke Ag Verfahren zum Übermitteln von Fahrzeugdaten zu einer Fahrzeug-Service-Station sowie Vorrichtung zur Durchführung des Verfahrens
DE19715632A1 (de) * 1997-04-15 1998-10-22 Broeder Marie Luise Meßwertübertragung elektrischer Größen durch Funksignal
DE102018133208A1 (de) * 2018-12-20 2020-06-25 FUSS-EMV-Ing. Max Fuss GmbH & Co. KG Messeinrichtung zur Bestimmung von emittierten Störspannungen und Störströmen in elektrischen Leitungen und in der Umgebungsluft

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2117204A5 (fr) * 1970-12-02 1972-07-21 Siemens Ag
FR2192422A1 (fr) * 1972-07-10 1974-02-08 Zettler Elektrotechn Alois
DE3538687A1 (de) * 1985-10-31 1987-05-07 Bosch Gmbh Robert Testeinrichtung

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2117204A5 (fr) * 1970-12-02 1972-07-21 Siemens Ag
FR2192422A1 (fr) * 1972-07-10 1974-02-08 Zettler Elektrotechn Alois
DE3538687A1 (de) * 1985-10-31 1987-05-07 Bosch Gmbh Robert Testeinrichtung

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
J.R.SMITH ET AL: "APPLICATION OF A NEW FREQUENCY-DIVISION MULTIPLEXING TECHNIQUE", ADVANCES IN INSTRUMENTATION AND CONTROL, vol. 45, 1990, RESEARCH TRIANGLE PARK US, pages 241 - 248, XP000171987 *

Also Published As

Publication number Publication date
EP0596240B1 (fr) 2000-06-21
ES2148196T3 (es) 2000-10-16
DE59310063D1 (de) 2000-07-27
DE4236923A1 (de) 1994-05-05
GR3034333T3 (en) 2000-12-29

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