Communications: electrical – Continuously variable indicating – With meter reading
Patent
1991-08-22
1993-11-09
Peng, John K.
Communications: electrical
Continuously variable indicating
With meter reading
34082572, 455 88, H04Q 100
Patent
active
052607011
DESCRIPTION:
BRIEF SUMMARY
The invention relates to a method of bidirectional transmission of data between a master system (transmitter) and a slave system (receiver) powered on the basis of the electromagnetic energy emitted by the master system, and to a device for implementing this method.
In numerous areas of the art, the need exists to have available such a device, whose slave system, devoid of any self-contained source for supplying electrical energy, is capable of receiving data, of powering electronic circuits or other loads, and of transmitting data to the master system.
Such is the case for example in the area of telemetry, remote control, active electronic devices which can be implanted in a human or animal body, etc., where for reasons of inaccessibility and/or of bulkiness of the slave system, of inadequate reliability and/or lifetime of electric batteries, etc., it is not always possible or desirable to equip the slave system with a self-contained source of electrical energy.
In the remainder of the description "slave system" therefore designates a system comprising at least one antenna and reception circuits and which is entirely dependent on the "master system" for its electrical energy supply, which energy is provided to it in electromagnetic form.
It is already known, in particular in respect of implantable active prostheses, to power a reception module on the basis of the energy radiated by the transmission antenna of a transmission module.
Thus, the document GB-A-2,123,648 describes an implantable prosthesis for biological stimulation comprising a reception antenna which is able to pick up radiation carrying, at one and the same time, control data and the energy required for powering the circuits and loads of the prosthesis. The energy received is stored in a capacitor which, in association with a voltage regulator, serves to supply circuits for demodulating the signal received, for decoding the data carried by this signal, for controlling and supplying the stimulation electrodes, etc. Data transmission takes place solely from the transmitter to the receiver and is therefore unidirectional.
However, it may prove necessary for such a prosthesis or a similar implanted electronic device to also be capable of outside transmission of measurement data on the electrical characteristics of the electrodes, on the state of operation of its electrical circuits, data provided by sensors, etc.
To this end, the document WO 84/01719 describes a device aimed at a similar application, the slave system of which is equipped with a transmission antenna and with circuits for transmitting the said data. The slave system of this device therefore includes both a reception module and a transmission module.
However, as regards the slave system, the not insignificant energy required for the transmission of data by emitting electromagnetic radiation becomes added to the energy consumed by the other circuits and loads which the reception module of the slave system must supply. Now, the instantaneous power extracted by the slave system from the radiation emitted by the master system is relatively low. In practice, this power proves inadequate to supply, at one and the same time, the reception, control and transmission circuits and the electrical loads of the slave system.
For this reason, the document WO 84/01719 provides for equipping the slave system with an accumulator capable of storing the energy picked up by the reception antenna. However, for reasons of bulkiness, weight, safety, reliability or for other reasons the presence of an electric accumulator in the slave system is often unacceptable.
It is moreover known from the document U.S. patent application Ser. No. 4,741,340 to carry out bidirectional transmission of data between a master system and a slave system comprising respectively a transmission antenna and a reception antenna which are tuned to the same frequency f, by modulating the impedance of the slave system, during reception of a data signal emitted by the master system, in accordance with data to be transmitted to the mas
REFERENCES:
patent: 4361153 (1982-11-01), Slocum et al.
patent: 4528987 (1985-07-01), Slocum
patent: 4532932 (1985-08-01), Batty, Jr.
patent: 4543953 (1985-10-01), Slocum et al.
patent: 4561443 (1985-12-01), Hogrefe et al.
patent: 4700707 (1987-10-01), Batina et al.
patent: 4741340 (1988-05-01), Batina et al.
Patent Abstracts of Japan; vol. 10; No. 197; Jul. 10, 1986 Japanese Pat. Appl'ns No. 6139740(A); 61-39741(A); and 61-39742(A).
IEEE 1987; CH2398-6/37/0000-0394, Numerical Determination of the Performance of Magnetically Coupled Coils in Medical Telemetry Systems, Osama A. Mohammed; pp. 394 to 397.
Ayraud Michel
Dubujet Bruno
Guern Yves
Gray Robert
Peng John K.
Societe Bertin & Cie
LandOfFree
Bidirectional inductive transmission of data with slave station does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Bidirectional inductive transmission of data with slave station , we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Bidirectional inductive transmission of data with slave station will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1146032