CA2084995A1 - Process and system for transmitting energy and data - Google Patents
Process and system for transmitting energy and dataInfo
- Publication number
- CA2084995A1 CA2084995A1 CA002084995A CA2084995A CA2084995A1 CA 2084995 A1 CA2084995 A1 CA 2084995A1 CA 002084995 A CA002084995 A CA 002084995A CA 2084995 A CA2084995 A CA 2084995A CA 2084995 A1 CA2084995 A1 CA 2084995A1
- Authority
- CA
- Canada
- Prior art keywords
- main unit
- data
- unit
- auxiliary unit
- transmitting
- 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.)
- Abandoned
Links
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B5/00—Near-field transmission systems, e.g. inductive or capacitive transmission systems
- H04B5/70—Near-field transmission systems, e.g. inductive or capacitive transmission systems specially adapted for specific purposes
-
- G—PHYSICS
- G06—COMPUTING OR CALCULATING; 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
- G06K7/08—Methods or arrangements for sensing record carriers, e.g. for reading patterns by means detecting the change of an electrostatic or magnetic field, e.g. by detecting change of capacitance between electrodes
- G06K7/082—Methods or arrangements for sensing record carriers, e.g. for reading patterns by means detecting the change of an electrostatic or magnetic field, e.g. by detecting change of capacitance between electrodes using inductive or magnetic sensors
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B5/00—Near-field transmission systems, e.g. inductive or capacitive transmission systems
- H04B5/20—Near-field transmission systems, e.g. inductive or capacitive transmission systems characterised by the transmission technique; characterised by the transmission medium
- H04B5/24—Inductive coupling
- H04B5/26—Inductive coupling using coils
- H04B5/266—One coil at each side, e.g. with primary and secondary coils
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B5/00—Near-field transmission systems, e.g. inductive or capacitive transmission systems
- H04B5/70—Near-field transmission systems, e.g. inductive or capacitive transmission systems specially adapted for specific purposes
- H04B5/79—Near-field transmission systems, e.g. inductive or capacitive transmission systems specially adapted for specific purposes for data transfer in combination with power transfer
Landscapes
- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Artificial Intelligence (AREA)
- Computer Vision & Pattern Recognition (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Theoretical Computer Science (AREA)
- Bidirectional Digital Transmission (AREA)
- Synchronisation In Digital Transmission Systems (AREA)
- Selective Calling Equipment (AREA)
- Near-Field Transmission Systems (AREA)
Abstract
ABSTRACT
In a process for transmitting energy from a main unit (2) to an auxiliary unit (3) and for transmitting data bidirectionally between these units, energy is transmitted from the main unit (2) to the auxiliary unit (3) in the form of an alternating supply signal of predetermined frequency, a clock signal is generated on the basis of the alternating supply signal, a first data signal is transmitted from the main unit (2) to the auxiliary unit (3), a time window is generated in said auxiliary unit (3) from the moment at which the first data signal is received and on a time basis determined by the clock signal, the number of oscillations of the first data signal within the time window is counted and used to determine the transmitted first data value, whereupon retransmission of a second data signal from the auxiliary unit (3) to the main unit (2) takes place.
In a process for transmitting energy from a main unit (2) to an auxiliary unit (3) and for transmitting data bidirectionally between these units, energy is transmitted from the main unit (2) to the auxiliary unit (3) in the form of an alternating supply signal of predetermined frequency, a clock signal is generated on the basis of the alternating supply signal, a first data signal is transmitted from the main unit (2) to the auxiliary unit (3), a time window is generated in said auxiliary unit (3) from the moment at which the first data signal is received and on a time basis determined by the clock signal, the number of oscillations of the first data signal within the time window is counted and used to determine the transmitted first data value, whereupon retransmission of a second data signal from the auxiliary unit (3) to the main unit (2) takes place.
Description
~8~9~
Process and 8yst~m ~or Transmitting Fnorgy and Data Description The present invention refers to a process for transmitting energy from a main unit to an auxiliary unit and for trans-mitting data bidirectionally between said main unit and said auxiliary unit as well as to a system, which comprises a main unit and an auxiliary unit and which is used for trans-mitting energy from the main unit to the auxiliary unit as well as for transmitting data bidirectionally between said main unit and said auxiliary unit.
GB-A-2182794 discloses an energy and data transmission pro-cess of the type mentioned hereinbefore. A clock signal is transmitted from the main unit to the auxiliary unit, said clock signal being shown in Fig. 10 in the first line. Each transmission cycle comprises 18 clock bits including each a data word of 8 bits adapted to be transmitted in a first direction, a data word of 8 bits adapted to be transmitted in the reverse direction as well as change-over data bits.
In the case of each clock cycle, the signal frequency trans-mitted, which is shown in the second line of Fig. 10, is sampled so as to detect the presence of "l" or of "O", the thus detected, sequentially received data word with 8 data bits being supplied to a comparator, when the data word has been received completely, and said comparator will compare this data word with a data word previously stored in a mem-ory. If the two data words correspond to each other, a log-ical "1" will be generated on the output side. If, in the case of such a transmission process and transmission system, only one single bit of the data word is detected incorrectly due to some type of malfunction, the data word transmitted will no longer be recognized.
EP-A-288 791 already discloses a process and a system for transmitting energy from a main unit to an auxiliary unit
Process and 8yst~m ~or Transmitting Fnorgy and Data Description The present invention refers to a process for transmitting energy from a main unit to an auxiliary unit and for trans-mitting data bidirectionally between said main unit and said auxiliary unit as well as to a system, which comprises a main unit and an auxiliary unit and which is used for trans-mitting energy from the main unit to the auxiliary unit as well as for transmitting data bidirectionally between said main unit and said auxiliary unit.
GB-A-2182794 discloses an energy and data transmission pro-cess of the type mentioned hereinbefore. A clock signal is transmitted from the main unit to the auxiliary unit, said clock signal being shown in Fig. 10 in the first line. Each transmission cycle comprises 18 clock bits including each a data word of 8 bits adapted to be transmitted in a first direction, a data word of 8 bits adapted to be transmitted in the reverse direction as well as change-over data bits.
In the case of each clock cycle, the signal frequency trans-mitted, which is shown in the second line of Fig. 10, is sampled so as to detect the presence of "l" or of "O", the thus detected, sequentially received data word with 8 data bits being supplied to a comparator, when the data word has been received completely, and said comparator will compare this data word with a data word previously stored in a mem-ory. If the two data words correspond to each other, a log-ical "1" will be generated on the output side. If, in the case of such a transmission process and transmission system, only one single bit of the data word is detected incorrectly due to some type of malfunction, the data word transmitted will no longer be recognized.
EP-A-288 791 already discloses a process and a system for transmitting energy from a main unit to an auxiliary unit
- 2 - 208~995 and for a bidirectional transmission of data between these units. In the case of the known process, a transmission of energy from the main unit to the auxiliary unit and a trans-mission of data from one unit to the other take place alter-nately. The transmission of energy and data takes place in a fixed cycle. Each cycle starts with an energy pulse of pre-determined duration, which is transmitted from the main unit to the auxiliary unit so as to guarantee that the auxiliary unit is supplied with energy. Upon expiration of a decay phase, which takes place when the energy pulse has been switched off, a change-over phase will follow in the course of which the main electronics can switch over the data di-rection between the main unit and the auxiliary unit for all additional data cycles by transmitting an additional energy pulse. If no transmission of energy is effected from the main unit to the auxiliary unit in the course of this change-over phase, a transmission of data in the previously determined data transmission direction will be carried out when the above-mentioned decay phase has expired.
The transmission of data between the main unit and the aux-iliary unit is effected by binary amplitude shift keying modulation in both directions of data transmission. This permits simple demodulation and high interference immunity.
In the case of this known process and system, the auxiliary unit has to have a separate frequency-determining element so that it cannot be fully implemented as a user-oriented in-tegrated circuit. Furthermore, it is necessary that the auxiliary unit is equipped with an energy store of compara-tively high capacity, and this, too, is opposed to integra-tion and to compact construction.
EP-Al-02 87 175 discloses an additional process and system for transmitting energy from a main unit to an auxiliary unit and for effecting bidirectional data transmission be-tween these units. In the case of this system, a simulta-neous transmission of energy and data takes place. When data are transmitted from the main unit to the subunit, a carrier 20~9~
is amplitude-modulated, eight bits (one byte) being - as will be explained hereinbelow - modulated onto a high-fre-quency carrier for each data bit to be transmitted. In the auxiliary unit, a clock signal and a data signal are ob-tained on the basis of the received, modulated signal by means of a voltage divider so as to be able to differentiate between a transmitted "0" with a Eirst, small amplitude and a transmitted "1" with a second, large amplitude. Hence, it will be necessary to adapt the transmitting power of the main unit to the attenuation of the respetive transmission link.
The transmission of data from the auxiliary unit to the main unit is effected by carrying out, by means of the auxiliary unit, a change of load at the secondary coil with half the carrier frequency. The phase position of the switching of the change of load at the secondary coil determines the state of the retransmitted bit. In order to achieve synchro-nous sequence control in the main unit and in the auxiliary unit, two start bits, one data bit with its complementary value, one clock bit with its complementary value and two stop bits are transmitted from the main unit for the trans-mission of each data bit. After the transmission of these bits, the carrier will not be modulated for a period of eight oscillations. During this period of time, data re-transmission will be carried out by retransmitting a data bit with the above-described change of load at the secondary coil.
EP-A2-03 20 015 discloses an additional process and system for transmitting energy from a main unit to an auxiliary unit and for bidirectional data transmission between these units. Data transmission from the main unit to the auxiliary unit is effected by pulse duration modulation of a high-fre-quency supply voltage signal by means of three different mark-to-space ratios corresponding to a transmitted "1", a transmitted "0" and the calling of a bit from the auxiliary unit. The retransmission of data from the auxiliary unit to 2 ~ 9 5 the main unit is effected by short-circuiting the secondary coil in the decay phase after the pulse which has been transmitted from the main unit to the auxiliary unit, where-by the decay level of the primary coil voltage will change.
A comparator in the main unit decides at a predetermined moment in the transmission cycle whether the value of the primary coil voltage corresponds to the retransmission of "1" or of "0" from the auxiliary unit to the main unit.
EP-A2-01 85 610 discloses an additional process and system for transmitting energy from a main unit to an auxiliary unit and for bidirectional data transmission between these units. The transmission of data from the main unit to the auxiliary unit is effected by modulating the mutual phase position of two coherent supply voltage oscillations. The transmission of data in the opposite direction is effected by load changes at the coils of the auxiliary unit. This permits simultaneous bidirectional data transmission. For transmitting the two coherent signals, two spatially sepa-rate pairs of coils are required.
US-C-47 30 188 discloses a different process and system for transmitting energy from a main unit to an auxiliary unit and for a unidirectional transmission of data from the aux-iliary unit to the main unit. The main unit continuously transmits a high-frequency alternating supply signal. The data to be transmitted from the auxiliary unit to the main unit are modulated by frequency shift keying with Manchester coding. It is true that this system requires neither any separate oscillator nor any separate energy store in the auxiliary unit, so that it can easily be implemented as an integrated circuit, but it is limited to unidirectional data transmission.
DE-A1-36 31 477 already discloses a network for transmitting data and energy, which comprises a network connected to a plurality of identically structured units. The network is supplied with energy by a central supply unit. The supply 20~4~
unit only serves to provide energy supply with a.c. voltage.
The transmission of data between the individual units is carried out in that one of the respective units accesses the network so as to subject the a.c. voltage signal, which is applied to said network, to amplitude modulation.
EP-A2-01 95 626 already discloses an information transmis-sion system in the case of which information, which has been modulated in a frequency shift keying process, is transmit-ted from an auxiliary unit to a main unit.
The technical journal "Technisches Messen", 1989, No. 4, pages 164 to 170, discloses the measure of using optical fibres for the purpose of transmitting energy from a main unit to distributed sensors.
Taking as a basis the above-described prior art, the present invention is based on the task of further developing a pro-cess and a system, which are used for transmitting energy from a main unit to an auxiliary unit and for transmitting data bidirectionally between these units, in such a way that the auxiliary unit has a simple and compact structural design and that a reliable transmission of data is guaran-teed in both directions of data transmission.
This task is solved by a process comprising the steps dis-closed in patent claims 1 or 2 and by systems having the features disclosed in patent claims 6 or 8.
Preferred further developments of the process according to the present invention are disclosed in claims 3 to 5 and preferred embodiments of the system according to the present invention are disclosed in claims 8 to 11.
In the following, a preferred embodiment of the transmission system according to the present invention, which works in accordance with the transmission process disclosed in the present invention, will be explained in detail with refer-- 6 - 2 0 3 ~ ~ 9 5 ence to the drawings enclosed, in which:
Fig. 1 shows an overview diagram of the transmission system;
Fig. 2 shows a block diagram of an embodiment of the auxiliary unit;
Fig. 3 shows a block diagram of an embodiment of the main unit; and Fig. 4 shows a time-sequence diagram for explaining the transmission process according to the present in-vention.
The system for transmitting data and energy, which, in Fig.
1, is provided with reference numeral 1 in its entirety, comprises a main unit 2 and an auxiliary unit 3. The main unit 2 includes a power supply unit 4 for supplying power to a main circuit means 5, which is connected to first and sec-ond coupling elements Lla, L2a. The auxiliary unit 3 in-cludes an auxiliary circuit means 6, which is connected to third and fourth coupling elements Llb, L2b.
Energy transmission from the main unit 2 to the auxiliary unit 3 takes place via the first and third coupling elements Lla, Llb. A bidirectional transmission of data between the main unit 2 and the auxiliary unit 3 takes place via the second and fourth coupling elements L2a, L2b.
To the person skilled in the art it will be evident that for data transmission as well as for energy transmission any type of non-contacting coupling elements will be suitable for inductive or capacitive or optical coupling.
In the case of the preferred embodiment shown, the coupling elements Lla, Llb, L2a, L2b have the form of coils for ef-fecting inductive coupling.
_ 7 _ 20~4g95 As can be seen in Fig. 2, the auxiliary unit 3 includes a rectifier circuit 7, which converts the alternating supply signal received from the third coupling element Llb into a d.c. supply voltage Vcc. The third coupling element Llb is additionally followed by a first signal-shaping circuit 8, which converts the received, essentially sinusoidal signal into an essentially rectangular clock signal, said clock signal being supplied to a reference counter 9 on the one hand and to a sequence control circuit 10 on the other.
The fourth coupling element L2b is followed by a first transmitting and receiving switch 11 whose control state is determined by the sequence control circuit 10. In its re-ceiving position, the first transmitting and receiving switch 11 connects the fourth coupling element L2b to a sec-ond signal-shaping circuit 12 connected to a data counter 13 on its input side. A microprocessor 14 communicates, on its output side, with the reference counter 9 as well as with the data counter 13, and, in addition, it is connected to the sequence control circuit 10 for a mutual exchange of data.
In a fundamentally customary manner, the microprocessor 14 is equipped with a reset logic circuit 15, which will reset the microprocessor, e.g. in the case of an initial applica-tion of the supply voltage Vcc or in cases in which unde-sirable program statuses occur.
A frequency shift keying circuit 16 for the retransmission of data from the auxiliary unit 3 to the main unit 2 is, depending on the logic value of the bit to be retransmitted, controlled by the microprocessor 14 for binary frequency shift keying, the output side of said frequency shift keying circuit 16 being connected to the first transmitting and receiving switch 11, which, in its transmitting position, connects said frequency shift keying circuit 16 to the fourth coupling member L2b.
20~ 9~
As can be seen in Fig. 3, the main unit 2 includes a host computer 17, a data transmission link existing between said host computer and a second microprocessor 18.
Furthermore, the main unit 2 includes an oscillator 19 con-nected to a power amplifier 20 whose output side is con-nected to the first coupling element Lla for transmitting a high-frequency alternating supply signal to the auxiliary unit 3.
Depending on a gating time or on-time determined by the sec-ond microprocessor 18, the output signal of the oscillator 19 is supplied to the second coupling element L2a in the transmitting position of a second transmitting and receiving switch 21. As will be explained in detail hereinbelow, a short or a long gating time of the through connection of the output signal of the oscillator 19 to the second coupling element L2a corresponds to the transmission of a first or of a second binary data value from the main unit 2 to the aux-iliary unit 3.
Instead of applying an output signal of an oscillator having a predetermined frequency to the second coupling element for different periods of time, it is - deviating from the em-bodiment shown - possible to connect a first or a second os-cillator having a first or a second frequency during respec-tive identical gating times to the second coupling element L2a for transmitting the first or second binary value.
In the receiving position of the second transmitting and receiving switch 21, which is determined by the second microprocessor 18, said transmitting and receiving switch 21 connects the second coupling element L2a to a first phase-locked loop 22 and a second phase-locked loop 23, each of said phase-locked loops being connected to the second microprocessor 18 on the output side thereof. The first phase-locked loop 22 responds to signals which have the first frequency produced by the frequency shift keying 9 2 ~
circuit 16 of the auxiliary unit 3, whereas the second phase-locked loop 23 responds to signals which have the second frequency coming from said frequency shift keying circuit 16.
Making reference to ~ig. 2 to 4, the transmission process will be explained in detail in the following. Starting with an actuation of the main unit, energy transmission in the form of the high-frequency alternating supply signal takes place continuously from the main unit 2 to the auxiliary unit 3. A clock signal is generated in the auxiliary unit 3 by the first signal-shaping circuit 8, the reference counter 9 being clocked or incremented by said clock signal. When a data signal from the main unit has been received by the aux-iliary unit, the data counter 13 is counted up in accordance with the oscillations of the data signal transmltted, the sequence control circuit 10 causing the reference counter 9 to count from the moment at which the data signal is re-ceived and, consequently, from the moment at which the data counter 13 begins to count. The reference counter 9 serves to define a time window with a time basis determined by the clock signal.
As soon as the count of the reference counter 9 has reached a maximum value or a final count corresponding to the end of the time window, the microprocessor 14 will cause reading of the data counter 13 at this moment. At the end of the time window, the first microprocessor 14 will switch over the first transmitting and receiving switch 11 so as to initiate a retransmission of data from the auxiliary unit 3 to the main unit 2. In accordance with the data value to be trans-mitted, the frequency shift keying circuit 16 will now pro-duce a send signal having one of two transmission frequen-cies. The second microprocessor 18 of the main unit switched over the second transmitting and receiving switch 21 after termination of data transmission to the auxiliary unit 3 so that either the first or the second phase-locked loop 22, 23 will respond to the signal transmitted by the auxiliary unit 208~9~
The transmission of data between the main unit and the aux-iliary unit is effected by binary amplitude shift keying modulation in both directions of data transmission. This permits simple demodulation and high interference immunity.
In the case of this known process and system, the auxiliary unit has to have a separate frequency-determining element so that it cannot be fully implemented as a user-oriented in-tegrated circuit. Furthermore, it is necessary that the auxiliary unit is equipped with an energy store of compara-tively high capacity, and this, too, is opposed to integra-tion and to compact construction.
EP-Al-02 87 175 discloses an additional process and system for transmitting energy from a main unit to an auxiliary unit and for effecting bidirectional data transmission be-tween these units. In the case of this system, a simulta-neous transmission of energy and data takes place. When data are transmitted from the main unit to the subunit, a carrier 20~9~
is amplitude-modulated, eight bits (one byte) being - as will be explained hereinbelow - modulated onto a high-fre-quency carrier for each data bit to be transmitted. In the auxiliary unit, a clock signal and a data signal are ob-tained on the basis of the received, modulated signal by means of a voltage divider so as to be able to differentiate between a transmitted "0" with a Eirst, small amplitude and a transmitted "1" with a second, large amplitude. Hence, it will be necessary to adapt the transmitting power of the main unit to the attenuation of the respetive transmission link.
The transmission of data from the auxiliary unit to the main unit is effected by carrying out, by means of the auxiliary unit, a change of load at the secondary coil with half the carrier frequency. The phase position of the switching of the change of load at the secondary coil determines the state of the retransmitted bit. In order to achieve synchro-nous sequence control in the main unit and in the auxiliary unit, two start bits, one data bit with its complementary value, one clock bit with its complementary value and two stop bits are transmitted from the main unit for the trans-mission of each data bit. After the transmission of these bits, the carrier will not be modulated for a period of eight oscillations. During this period of time, data re-transmission will be carried out by retransmitting a data bit with the above-described change of load at the secondary coil.
EP-A2-03 20 015 discloses an additional process and system for transmitting energy from a main unit to an auxiliary unit and for bidirectional data transmission between these units. Data transmission from the main unit to the auxiliary unit is effected by pulse duration modulation of a high-fre-quency supply voltage signal by means of three different mark-to-space ratios corresponding to a transmitted "1", a transmitted "0" and the calling of a bit from the auxiliary unit. The retransmission of data from the auxiliary unit to 2 ~ 9 5 the main unit is effected by short-circuiting the secondary coil in the decay phase after the pulse which has been transmitted from the main unit to the auxiliary unit, where-by the decay level of the primary coil voltage will change.
A comparator in the main unit decides at a predetermined moment in the transmission cycle whether the value of the primary coil voltage corresponds to the retransmission of "1" or of "0" from the auxiliary unit to the main unit.
EP-A2-01 85 610 discloses an additional process and system for transmitting energy from a main unit to an auxiliary unit and for bidirectional data transmission between these units. The transmission of data from the main unit to the auxiliary unit is effected by modulating the mutual phase position of two coherent supply voltage oscillations. The transmission of data in the opposite direction is effected by load changes at the coils of the auxiliary unit. This permits simultaneous bidirectional data transmission. For transmitting the two coherent signals, two spatially sepa-rate pairs of coils are required.
US-C-47 30 188 discloses a different process and system for transmitting energy from a main unit to an auxiliary unit and for a unidirectional transmission of data from the aux-iliary unit to the main unit. The main unit continuously transmits a high-frequency alternating supply signal. The data to be transmitted from the auxiliary unit to the main unit are modulated by frequency shift keying with Manchester coding. It is true that this system requires neither any separate oscillator nor any separate energy store in the auxiliary unit, so that it can easily be implemented as an integrated circuit, but it is limited to unidirectional data transmission.
DE-A1-36 31 477 already discloses a network for transmitting data and energy, which comprises a network connected to a plurality of identically structured units. The network is supplied with energy by a central supply unit. The supply 20~4~
unit only serves to provide energy supply with a.c. voltage.
The transmission of data between the individual units is carried out in that one of the respective units accesses the network so as to subject the a.c. voltage signal, which is applied to said network, to amplitude modulation.
EP-A2-01 95 626 already discloses an information transmis-sion system in the case of which information, which has been modulated in a frequency shift keying process, is transmit-ted from an auxiliary unit to a main unit.
The technical journal "Technisches Messen", 1989, No. 4, pages 164 to 170, discloses the measure of using optical fibres for the purpose of transmitting energy from a main unit to distributed sensors.
Taking as a basis the above-described prior art, the present invention is based on the task of further developing a pro-cess and a system, which are used for transmitting energy from a main unit to an auxiliary unit and for transmitting data bidirectionally between these units, in such a way that the auxiliary unit has a simple and compact structural design and that a reliable transmission of data is guaran-teed in both directions of data transmission.
This task is solved by a process comprising the steps dis-closed in patent claims 1 or 2 and by systems having the features disclosed in patent claims 6 or 8.
Preferred further developments of the process according to the present invention are disclosed in claims 3 to 5 and preferred embodiments of the system according to the present invention are disclosed in claims 8 to 11.
In the following, a preferred embodiment of the transmission system according to the present invention, which works in accordance with the transmission process disclosed in the present invention, will be explained in detail with refer-- 6 - 2 0 3 ~ ~ 9 5 ence to the drawings enclosed, in which:
Fig. 1 shows an overview diagram of the transmission system;
Fig. 2 shows a block diagram of an embodiment of the auxiliary unit;
Fig. 3 shows a block diagram of an embodiment of the main unit; and Fig. 4 shows a time-sequence diagram for explaining the transmission process according to the present in-vention.
The system for transmitting data and energy, which, in Fig.
1, is provided with reference numeral 1 in its entirety, comprises a main unit 2 and an auxiliary unit 3. The main unit 2 includes a power supply unit 4 for supplying power to a main circuit means 5, which is connected to first and sec-ond coupling elements Lla, L2a. The auxiliary unit 3 in-cludes an auxiliary circuit means 6, which is connected to third and fourth coupling elements Llb, L2b.
Energy transmission from the main unit 2 to the auxiliary unit 3 takes place via the first and third coupling elements Lla, Llb. A bidirectional transmission of data between the main unit 2 and the auxiliary unit 3 takes place via the second and fourth coupling elements L2a, L2b.
To the person skilled in the art it will be evident that for data transmission as well as for energy transmission any type of non-contacting coupling elements will be suitable for inductive or capacitive or optical coupling.
In the case of the preferred embodiment shown, the coupling elements Lla, Llb, L2a, L2b have the form of coils for ef-fecting inductive coupling.
_ 7 _ 20~4g95 As can be seen in Fig. 2, the auxiliary unit 3 includes a rectifier circuit 7, which converts the alternating supply signal received from the third coupling element Llb into a d.c. supply voltage Vcc. The third coupling element Llb is additionally followed by a first signal-shaping circuit 8, which converts the received, essentially sinusoidal signal into an essentially rectangular clock signal, said clock signal being supplied to a reference counter 9 on the one hand and to a sequence control circuit 10 on the other.
The fourth coupling element L2b is followed by a first transmitting and receiving switch 11 whose control state is determined by the sequence control circuit 10. In its re-ceiving position, the first transmitting and receiving switch 11 connects the fourth coupling element L2b to a sec-ond signal-shaping circuit 12 connected to a data counter 13 on its input side. A microprocessor 14 communicates, on its output side, with the reference counter 9 as well as with the data counter 13, and, in addition, it is connected to the sequence control circuit 10 for a mutual exchange of data.
In a fundamentally customary manner, the microprocessor 14 is equipped with a reset logic circuit 15, which will reset the microprocessor, e.g. in the case of an initial applica-tion of the supply voltage Vcc or in cases in which unde-sirable program statuses occur.
A frequency shift keying circuit 16 for the retransmission of data from the auxiliary unit 3 to the main unit 2 is, depending on the logic value of the bit to be retransmitted, controlled by the microprocessor 14 for binary frequency shift keying, the output side of said frequency shift keying circuit 16 being connected to the first transmitting and receiving switch 11, which, in its transmitting position, connects said frequency shift keying circuit 16 to the fourth coupling member L2b.
20~ 9~
As can be seen in Fig. 3, the main unit 2 includes a host computer 17, a data transmission link existing between said host computer and a second microprocessor 18.
Furthermore, the main unit 2 includes an oscillator 19 con-nected to a power amplifier 20 whose output side is con-nected to the first coupling element Lla for transmitting a high-frequency alternating supply signal to the auxiliary unit 3.
Depending on a gating time or on-time determined by the sec-ond microprocessor 18, the output signal of the oscillator 19 is supplied to the second coupling element L2a in the transmitting position of a second transmitting and receiving switch 21. As will be explained in detail hereinbelow, a short or a long gating time of the through connection of the output signal of the oscillator 19 to the second coupling element L2a corresponds to the transmission of a first or of a second binary data value from the main unit 2 to the aux-iliary unit 3.
Instead of applying an output signal of an oscillator having a predetermined frequency to the second coupling element for different periods of time, it is - deviating from the em-bodiment shown - possible to connect a first or a second os-cillator having a first or a second frequency during respec-tive identical gating times to the second coupling element L2a for transmitting the first or second binary value.
In the receiving position of the second transmitting and receiving switch 21, which is determined by the second microprocessor 18, said transmitting and receiving switch 21 connects the second coupling element L2a to a first phase-locked loop 22 and a second phase-locked loop 23, each of said phase-locked loops being connected to the second microprocessor 18 on the output side thereof. The first phase-locked loop 22 responds to signals which have the first frequency produced by the frequency shift keying 9 2 ~
circuit 16 of the auxiliary unit 3, whereas the second phase-locked loop 23 responds to signals which have the second frequency coming from said frequency shift keying circuit 16.
Making reference to ~ig. 2 to 4, the transmission process will be explained in detail in the following. Starting with an actuation of the main unit, energy transmission in the form of the high-frequency alternating supply signal takes place continuously from the main unit 2 to the auxiliary unit 3. A clock signal is generated in the auxiliary unit 3 by the first signal-shaping circuit 8, the reference counter 9 being clocked or incremented by said clock signal. When a data signal from the main unit has been received by the aux-iliary unit, the data counter 13 is counted up in accordance with the oscillations of the data signal transmltted, the sequence control circuit 10 causing the reference counter 9 to count from the moment at which the data signal is re-ceived and, consequently, from the moment at which the data counter 13 begins to count. The reference counter 9 serves to define a time window with a time basis determined by the clock signal.
As soon as the count of the reference counter 9 has reached a maximum value or a final count corresponding to the end of the time window, the microprocessor 14 will cause reading of the data counter 13 at this moment. At the end of the time window, the first microprocessor 14 will switch over the first transmitting and receiving switch 11 so as to initiate a retransmission of data from the auxiliary unit 3 to the main unit 2. In accordance with the data value to be trans-mitted, the frequency shift keying circuit 16 will now pro-duce a send signal having one of two transmission frequen-cies. The second microprocessor 18 of the main unit switched over the second transmitting and receiving switch 21 after termination of data transmission to the auxiliary unit 3 so that either the first or the second phase-locked loop 22, 23 will respond to the signal transmitted by the auxiliary unit 208~9~
3, and this, in turn, will be detected by the second micro-processor 18. The retransmission of data is herewith finished.
The process according to the present invention permits, of course, more than only one bit to be transmitted per trans-mission in the respective data direction, provided that the data counter 13 has a sufficient capacity and that the transmission link is sufficiently safe. A multi-bit data re-transmission will require, instead of binary frequency shift keying, an appropriate multiple frequency shift keying with a suitable multiple phase-locked loop.
The process and the system according to the present inven-tion permit the use of a minimal amount of circuit elements on the side of the auxiliary unit 3, which, in addition to the use of comparators and basic gates, can be implemented almost exclusively by flipflops for realizing counters and dividers. It is thus easily possible to carry out the aux-iliary unit as a user-oriented integrated circuit.
In the case of the transmission process according to the present invention, forced synchronization takes place. The main unit determines the moment at which a cycle starts and the auxiliary unit determines the end of the cycle. Due to these characteristics of the transmission process, the main unit as well as the auxiliary unit can, before a respective data transmission takes place, let the respective other unit wait so as to accomplish specific time-critical tasks.
The process according to the present invention is addition-ally characterized by high transmission reliability. An al-most arbitrarily high transmission reliability can be achieved by a suitable selection of the time window. If the time window, which is determined by the circuitry used, is chosen large enough, the content of the data counter can be interpreted by means of a suitable software in such a way that bits are, for example, transmitted in pairs or that the 2~499~
content of the data counter corresponds directly to one byte. However, this will, of course, result in a reduction of the achievable transmission reliability.
Due to the frequency shift keying modulation process chosen, also the transmission of data from the auxiliary unit to the main unit is immune to trouble.
Due to the fact that, after each bit received, the auxiliary unit can retransmit a bit, transmission of a byte in both data directions can take place almost simultaneously.
The process according to the present invention permits, of course, more than only one bit to be transmitted per trans-mission in the respective data direction, provided that the data counter 13 has a sufficient capacity and that the transmission link is sufficiently safe. A multi-bit data re-transmission will require, instead of binary frequency shift keying, an appropriate multiple frequency shift keying with a suitable multiple phase-locked loop.
The process and the system according to the present inven-tion permit the use of a minimal amount of circuit elements on the side of the auxiliary unit 3, which, in addition to the use of comparators and basic gates, can be implemented almost exclusively by flipflops for realizing counters and dividers. It is thus easily possible to carry out the aux-iliary unit as a user-oriented integrated circuit.
In the case of the transmission process according to the present invention, forced synchronization takes place. The main unit determines the moment at which a cycle starts and the auxiliary unit determines the end of the cycle. Due to these characteristics of the transmission process, the main unit as well as the auxiliary unit can, before a respective data transmission takes place, let the respective other unit wait so as to accomplish specific time-critical tasks.
The process according to the present invention is addition-ally characterized by high transmission reliability. An al-most arbitrarily high transmission reliability can be achieved by a suitable selection of the time window. If the time window, which is determined by the circuitry used, is chosen large enough, the content of the data counter can be interpreted by means of a suitable software in such a way that bits are, for example, transmitted in pairs or that the 2~499~
content of the data counter corresponds directly to one byte. However, this will, of course, result in a reduction of the achievable transmission reliability.
Due to the frequency shift keying modulation process chosen, also the transmission of data from the auxiliary unit to the main unit is immune to trouble.
Due to the fact that, after each bit received, the auxiliary unit can retransmit a bit, transmission of a byte in both data directions can take place almost simultaneously.
Claims (11)
1. A process for transmitting energy from a main unit to an auxiliary unit and for transmitting data bidirectionally between said main unit and said auxiliary unit, comprising the following process steps:
- transmitting energy as an alternating supply signal of predetermined frequency from the main unit (2) to the auxiliary unit (3);
- generating a clock signal for the auxiliary unit on the basis of the alternating supply signal transmitted from the main unit (2) to the auxiliary unit (3);
- transmitting a first data signal from the main unit (2) to the auxiliary unit (3); and - retransmitting a second data signal from the auxiliary unit (3) to the main unit (2);
characterized by the following process steps:
- counting the number of oscillations of the clock signal from the moment at which the reception of the first data signal begins;
- counting the number of oscillations of the first data signal;
- stopping the operation of counting the oscillations of the first data signal as soon as a predetermined count, which corresponds to the time window, has been reached in the operation of counting the oscillations of the clock signal; and - determining the received first data value on the basis of the count;
- the retransmission of a second data signal from the auxiliary unit (3) to the main unit (2) being effected as soon as the predetermined count, which corresponds to the time window, has been reached in the counting operation of the clock signal.
- transmitting energy as an alternating supply signal of predetermined frequency from the main unit (2) to the auxiliary unit (3);
- generating a clock signal for the auxiliary unit on the basis of the alternating supply signal transmitted from the main unit (2) to the auxiliary unit (3);
- transmitting a first data signal from the main unit (2) to the auxiliary unit (3); and - retransmitting a second data signal from the auxiliary unit (3) to the main unit (2);
characterized by the following process steps:
- counting the number of oscillations of the clock signal from the moment at which the reception of the first data signal begins;
- counting the number of oscillations of the first data signal;
- stopping the operation of counting the oscillations of the first data signal as soon as a predetermined count, which corresponds to the time window, has been reached in the operation of counting the oscillations of the clock signal; and - determining the received first data value on the basis of the count;
- the retransmission of a second data signal from the auxiliary unit (3) to the main unit (2) being effected as soon as the predetermined count, which corresponds to the time window, has been reached in the counting operation of the clock signal.
2. A process for transmitting energy from a main unit to an auxiliary unit and for transmitting data bidirectionally between said main unit and said auxiliary unit, comprising the following process steps:
- transmitting energy as an alternating supply signal of predetermined frequency from the main unit (2) to the auxiliary unit (3);
- generating a clock signal for the auxiliary unit on the basis of the alternating supply signal transmitted from the main unit (2) to the auxiliary unit (3);
- transmitting a first data signal from the main unit (2) to the auxiliary unit (3); and - retransmitting a second data signal from the auxiliary unit (3) to the main unit (2);
characterized by the following process steps:
- counting the number of oscillations of the clock signal from the moment at which the reception of the first data signal begins;
- counting the number of oscillations of the first data signal;
- stopping the operation of counting the oscillations of the first data signal as soon as a predetermined count, which corresponds to the time window, has been reached in the operation of counting the oscillations of the clock signal; and - determining the received first data value on the basis of the count;
- the retransmission of a second data signal from the auxiliary unit (3) to the main unit (2) being effected as soon as the transmission of the first data signal from said main unit (2) to said auxiliary unit (3) has been finished.
- transmitting energy as an alternating supply signal of predetermined frequency from the main unit (2) to the auxiliary unit (3);
- generating a clock signal for the auxiliary unit on the basis of the alternating supply signal transmitted from the main unit (2) to the auxiliary unit (3);
- transmitting a first data signal from the main unit (2) to the auxiliary unit (3); and - retransmitting a second data signal from the auxiliary unit (3) to the main unit (2);
characterized by the following process steps:
- counting the number of oscillations of the clock signal from the moment at which the reception of the first data signal begins;
- counting the number of oscillations of the first data signal;
- stopping the operation of counting the oscillations of the first data signal as soon as a predetermined count, which corresponds to the time window, has been reached in the operation of counting the oscillations of the clock signal; and - determining the received first data value on the basis of the count;
- the retransmission of a second data signal from the auxiliary unit (3) to the main unit (2) being effected as soon as the transmission of the first data signal from said main unit (2) to said auxiliary unit (3) has been finished.
3. A process according to claim 1 or 2, characterized in - that the auxiliary unit (3) modulates the second data signal by frequency shift keying by means of at least two frequencies.
4. A process according to one of the claims 1 to 3, charac-terized in - that the main unit modulates the first data signal by producing a signal of fixed frequency with an oscil-lation period depending on the data.
5. A process according to one of the claims 1 to 3, charac-terized in - that the main unit (2) modulates the first data signal by frequency shift keying.
6. A system comprising a main unit (2) and an auxiliary unit (3) and used for transmitting energy from said main unit (2) to said auxiliary unit (3) and for transmitting data bidirectionally between said main unit (2) and said aux-iliary unit (3), - said main unit (2) having the following features:
-- an oscillator (19) for producing an alternating supply signal of predetermined frequency;
-- a first transmitting means (18, 19, 21) for trans-mitting a first data signal from the main unit (2) to the auxiliary unit (3); and -- a first receiving means (22, 23, 18) for receiving a second data signal from the auxiliary unit (3); and - said auxiliary unit (3) having the following features:
-- a clock signal generating means (8) for generating a clock signal on the basis of the alternating supply signal transmitted from the main unit (2) to the auxiliary unit (3); and -- a second transmitting means (14, 16) for transmit-ting a second data signal from said auxiliary unit (3) to said main unit (2);
characterized in that the auxiliary unit (3) addition-ally has the following features:
-- a reference counter (9) for generating a time win-dow, said reference counter (9) being activated upon reception of the first data signal and counting pulses of the clock signal and generating a time window signal until a count corresponding to the time window has been reached; and -- a data counter (13) counting the oscillations of the first data signal while the time window signal is present;
-- said second transmitting means (14, 16) for trans-mitting a second data signal from the auxiliary unit (3) to the main unit (2) responding to the end of the time window for transmitting the second data signal from the auxiliary unit (3) to the main unit (2).
-- an oscillator (19) for producing an alternating supply signal of predetermined frequency;
-- a first transmitting means (18, 19, 21) for trans-mitting a first data signal from the main unit (2) to the auxiliary unit (3); and -- a first receiving means (22, 23, 18) for receiving a second data signal from the auxiliary unit (3); and - said auxiliary unit (3) having the following features:
-- a clock signal generating means (8) for generating a clock signal on the basis of the alternating supply signal transmitted from the main unit (2) to the auxiliary unit (3); and -- a second transmitting means (14, 16) for transmit-ting a second data signal from said auxiliary unit (3) to said main unit (2);
characterized in that the auxiliary unit (3) addition-ally has the following features:
-- a reference counter (9) for generating a time win-dow, said reference counter (9) being activated upon reception of the first data signal and counting pulses of the clock signal and generating a time window signal until a count corresponding to the time window has been reached; and -- a data counter (13) counting the oscillations of the first data signal while the time window signal is present;
-- said second transmitting means (14, 16) for trans-mitting a second data signal from the auxiliary unit (3) to the main unit (2) responding to the end of the time window for transmitting the second data signal from the auxiliary unit (3) to the main unit (2).
7. A system comprising a main unit (2) and an auxiliary unit (3) and used for transmitting energy from said main unit (2) to said auxiliary unit (3) and for transmitting data bidirectionally between said main unit (2) and said aux-iliary unit (3), - said main unit (2) having the following features:
-- an oscillator (19) for producing an alternating supply signal of predetermined frequency;
-- a first transmittin means (18, 19, 21) for trans-mitting a first data signal from the main unit (2) to the auxiliary unit (3); and -- a first receiving means (22, 23, 18) for receiving a second data signal from the auxiliary unit (3); and - said auxiliary unit (3) having the following features:
-- a clock signal generating means (8) for generating a clock signal on the basis of the alternating supply signal transmitted from the main unit (2) to the auxiliary unit (3); and -- a second transmitting means (14, 16) for transmit-ting a second data signal from the auxiliary unit (3) to the main unit (2);
characterized in that the auxiliary unit (3) additionally has the following features:
-- a reference counter (9) for generating a time window, said reference counter (9) being activated upon recep-tion of the first data signal and counting pulses of the clock signal and generating a time window signal until a count corresponding to the time window has been reached; and -- a data counter (13) counting the oscillations of the first data signal while the time window signal is present;
-- said second transmitting means (14, 16) for transmit-ting a second data signal from the auxiliary unit (3) to the main unit (2) responding to the end of the transmission of the first data signal from said main unit (2) to said auxiliary unit (3) for transmitting the second data signal from said auxiliary unit (3) to said main unit (2).
-- an oscillator (19) for producing an alternating supply signal of predetermined frequency;
-- a first transmittin means (18, 19, 21) for trans-mitting a first data signal from the main unit (2) to the auxiliary unit (3); and -- a first receiving means (22, 23, 18) for receiving a second data signal from the auxiliary unit (3); and - said auxiliary unit (3) having the following features:
-- a clock signal generating means (8) for generating a clock signal on the basis of the alternating supply signal transmitted from the main unit (2) to the auxiliary unit (3); and -- a second transmitting means (14, 16) for transmit-ting a second data signal from the auxiliary unit (3) to the main unit (2);
characterized in that the auxiliary unit (3) additionally has the following features:
-- a reference counter (9) for generating a time window, said reference counter (9) being activated upon recep-tion of the first data signal and counting pulses of the clock signal and generating a time window signal until a count corresponding to the time window has been reached; and -- a data counter (13) counting the oscillations of the first data signal while the time window signal is present;
-- said second transmitting means (14, 16) for transmit-ting a second data signal from the auxiliary unit (3) to the main unit (2) responding to the end of the transmission of the first data signal from said main unit (2) to said auxiliary unit (3) for transmitting the second data signal from said auxiliary unit (3) to said main unit (2).
8. A system according to claim 6 or 7, characterized in - that the main unit (2) as well as the auxiliary unit (3) each include an energy and data transmitting ele-ment (L1a, L1b; L2a, L2b) for the transmission of energy from the main unit (2) to the auxiliary unit (3) and for the bidirectional transmission of data between these units.
9. A system according to claim 8, characterized in - that the auxiliary unit (3) additionally has the fol-lowing features:
-- a first digital control device (10, 14, 15);
-- a first transmitting and receiving switch (11) con-nected to said first digital control device (10, 14, 15) and to the data transmitting element (L2b) of the auxiliary unit (3);
-- a first signal-shaping circuit (12), which is con-nected downstream of said first transmitting and receiving switch (11) and the output side of which is connected to the data counter (13), said data counter (13) being, in turn, connected to the first digital control device (10, 14, 15) on the output side thereof;
-- a rectifier circuit (7) connected to the energy transmitting element (Llb); and -- a second signal-shaping circuit (8), which is also connected to the energy transmitting element (Llb) and the output side of which is connected to the reference counter (9), said reference counter (9) being, in turn, connected to the first digital con-trol device (10, 14, 15) on its output side.
-- a first digital control device (10, 14, 15);
-- a first transmitting and receiving switch (11) con-nected to said first digital control device (10, 14, 15) and to the data transmitting element (L2b) of the auxiliary unit (3);
-- a first signal-shaping circuit (12), which is con-nected downstream of said first transmitting and receiving switch (11) and the output side of which is connected to the data counter (13), said data counter (13) being, in turn, connected to the first digital control device (10, 14, 15) on the output side thereof;
-- a rectifier circuit (7) connected to the energy transmitting element (Llb); and -- a second signal-shaping circuit (8), which is also connected to the energy transmitting element (Llb) and the output side of which is connected to the reference counter (9), said reference counter (9) being, in turn, connected to the first digital con-trol device (10, 14, 15) on its output side.
10. A system according to claim 9, characterized in - that the second transmitting means is provided with a frequency shift keying circuit (16), which is con-nected to the digital control device (10, 14, 15) on its input side and to the first transmitting and re-ceiving switch (11) on its output side.
11. A system according to one of the claims 6 to 10, charac-terized in - that the main unit (2) additionally has the following features:
-- a second digital control device (17, 18);
-- a second transmitting and receiving switch (21) connected to said second digital control device (17, 18) and to the data transmitting element (L2a) of the main unit (2);
--- said second transmitting and receiving switch (21) connecting, in its transmitting position, the oscillator (19) to the data transmitting element (L2a) of the main unit (2) during a gating time predetermined by the second digital control device (17, 18) in accordance with the data to be transmitted, and --- connecting, in its receiving position, the data transmitting element (L2a) of the main unit (2) to first and second phase-locked loops (22, 23), which are connected to said second digital control device (17, 18) on their output sides.
-- a second digital control device (17, 18);
-- a second transmitting and receiving switch (21) connected to said second digital control device (17, 18) and to the data transmitting element (L2a) of the main unit (2);
--- said second transmitting and receiving switch (21) connecting, in its transmitting position, the oscillator (19) to the data transmitting element (L2a) of the main unit (2) during a gating time predetermined by the second digital control device (17, 18) in accordance with the data to be transmitted, and --- connecting, in its receiving position, the data transmitting element (L2a) of the main unit (2) to first and second phase-locked loops (22, 23), which are connected to said second digital control device (17, 18) on their output sides.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE4018814A DE4018814A1 (en) | 1990-06-12 | 1990-06-12 | METHOD AND SYSTEM FOR TRANSMITTING ENERGY AND DATA |
| DEP4018814.0 | 1990-06-12 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA2084995A1 true CA2084995A1 (en) | 1991-12-13 |
Family
ID=6408272
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA002084995A Abandoned CA2084995A1 (en) | 1990-06-12 | 1991-06-05 | Process and system for transmitting energy and data |
Country Status (7)
| Country | Link |
|---|---|
| EP (1) | EP0533709B1 (en) |
| JP (1) | JPH05502147A (en) |
| KR (1) | KR960000146B1 (en) |
| AU (1) | AU640026B2 (en) |
| CA (1) | CA2084995A1 (en) |
| DE (2) | DE4018814A1 (en) |
| WO (1) | WO1991020135A1 (en) |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE19636031A1 (en) * | 1996-09-05 | 1998-03-12 | Varchmin J Uwe Prof Dr Ing | Communication system for explosive detonation |
| US8363744B2 (en) | 2001-06-10 | 2013-01-29 | Aloft Media, Llc | Method and system for robust, secure, and high-efficiency voice and packet transmission over ad-hoc, mesh, and MIMO communication networks |
| DE10228060A1 (en) * | 2002-06-19 | 2004-01-15 | Robert Bosch Gmbh | Method and circuit arrangement for the transmission of binary user data |
| DE10240671A1 (en) | 2002-09-04 | 2004-03-18 | Christian Bauer Gmbh + Co | Combustion engine knocking sensor has a piezo-resistive amorphous carbon, or DLC, layer as a sensor element, which provides an electrical signal that is evaluated to detect knocking |
| DE10329123B3 (en) | 2003-06-27 | 2004-09-16 | Christian Bauer Gmbh + Co | Clutch, especially vehicle gearbox lamella clutch, has sensor for determining spring device output force, device for transferring measurement value for displacement force source control/regulation |
| AT512504B1 (en) * | 2012-03-22 | 2013-09-15 | Seibersdorf Labor Gmbh | Apparatus and method for determining the capacity |
| CN110350943B (en) * | 2018-09-28 | 2023-09-15 | 深圳市速腾聚创科技有限公司 | Wireless communication device with energy transmission and wireless communication method with energy transmission |
Family Cites Families (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2290801A1 (en) * | 1974-11-08 | 1976-06-04 | Thomson Csf | Numeric transmission and reception centre - which is for use at millimetric wavelengths, has automatic frame length correction system |
| JPS5732144A (en) * | 1980-08-06 | 1982-02-20 | Nippon Gakki Seizo Kk | Energy and/or data transmitter and receiver |
| AU1999983A (en) * | 1982-10-01 | 1984-04-05 | Sugar Research Limited | Load monitoring means |
| DE3336717A1 (en) * | 1983-10-08 | 1985-04-25 | Dai Nippon Printing Co., Ltd., Tokio/Tokyo | METHOD AND DEVICE FOR CONTACTLESS, ELECTROMAGNETIC TRANSFERRING OF CONTROL COMMANDS AND DATA |
| JPS60171475A (en) * | 1984-02-15 | 1985-09-04 | アイデンティフィケ−ション・デバイセス・インコ−ポレ−テッド | Discriminating system |
| JPS61101885A (en) * | 1984-10-24 | 1986-05-20 | Tdk Corp | Ic card connecting system |
| DE3447560A1 (en) * | 1984-12-21 | 1986-07-10 | Angewandte Digital Elektronik Gmbh, 2051 Brunstorf | DEVICE FOR CONTACTLESS SIGNAL AND ENERGY TRANSMISSION |
| GB8507281D0 (en) * | 1985-03-20 | 1985-04-24 | Emi Ltd | Data communications system |
| JPS61283981A (en) * | 1985-06-11 | 1986-12-13 | Nippon Denzai Kogyo Kenkyusho:Kk | Integrated circuit card |
| DE3631477C3 (en) * | 1986-09-16 | 1995-01-26 | Siegfried Dipl Ing Schwarz | Network for control, measurement and regulation technology for data and energy transmission |
| NL8700861A (en) * | 1987-04-13 | 1988-11-01 | Nedap Nv | READING, WRITING SYSTEM WITH MINIATURE INFORMATION CARRIER. |
| DE3714195A1 (en) * | 1987-04-29 | 1988-11-10 | Fraunhofer Ges Forschung | METHOD FOR CONTACTLESS ENERGY AND DATA TRANSFER, AND MECHANICAL AND ELECTRONICALLY CODED LOCK |
| DE3850753T2 (en) * | 1987-12-09 | 1995-03-16 | Omron Tateisi Electronics Co | Inductive data transmission system. |
| JPH0732368B2 (en) * | 1987-12-09 | 1995-04-10 | オムロン株式会社 | Data communication device |
-
1990
- 1990-06-12 DE DE4018814A patent/DE4018814A1/en active Granted
-
1991
- 1991-06-05 DE DE91910294T patent/DE59100782D1/en not_active Expired - Fee Related
- 1991-06-05 EP EP19910910294 patent/EP0533709B1/en not_active Expired - Lifetime
- 1991-06-05 JP JP3509507A patent/JPH05502147A/en active Pending
- 1991-06-05 AU AU79719/91A patent/AU640026B2/en not_active Ceased
- 1991-06-05 CA CA002084995A patent/CA2084995A1/en not_active Abandoned
- 1991-06-05 WO PCT/DE1991/000480 patent/WO1991020135A1/en active IP Right Grant
- 1991-06-05 KR KR1019920703164A patent/KR960000146B1/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| AU640026B2 (en) | 1993-08-12 |
| DE59100782D1 (en) | 1994-02-10 |
| AU7971991A (en) | 1992-01-07 |
| EP0533709A1 (en) | 1993-03-31 |
| WO1991020135A1 (en) | 1991-12-26 |
| EP0533709B1 (en) | 1993-12-29 |
| DE4018814C2 (en) | 1993-02-04 |
| JPH05502147A (en) | 1993-04-15 |
| KR960000146B1 (en) | 1996-01-03 |
| KR930701798A (en) | 1993-06-12 |
| DE4018814A1 (en) | 1992-01-02 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| EEER | Examination request | ||
| FZDE | Discontinued |