DE10260070B4 - System with an electric cable - Google Patents

Abstract

System, with an electrical cable,
comprising at least one stationary part and a mobile part, which is movable relative to the stationary part and at least can be supplied with energy and information from the stationary part,
wherein the movable part comprises an antenna device for at least receiving the electromagnetic radiation emerging from an electrical cable, which is connected to a receiving and evaluating unit for determining the received information,
wherein the movable part comprises a sensor for detecting the field strength of the electromagnetic radiation emerging from the electrical cable,
wherein the sensor is connected to an evaluation unit for position detection,
wherein the electrical cable is designed as a coaxial conductor and comprises at least one inner conductor, which is surrounded by at least one insulator, and at least one shielding conductor, which surrounds the insulator and is surrounded by an electrically insulating outer jacket,
wherein the shield conductor in the axial direction, ie in the cable direction, has a longitudinal slot with varying width, ...

Description

The The invention relates to a system with an electrical cable.

coaxial include an axially extending inner conductor and a shield conductor. They serve for transmission of electromagnetic waves for information transmission by means of modulation methods, such as amplitude modulation and / or frequency modulation.

From the DE 195 12 107 A1 In the closest prior art, a non-contact power transmission system is known in which a coaxial cable is also provided. The disadvantage here is that the coaxial cable used as a leaky waveguide is used only for information transmission.

From the DE 37 84 678 T2 a system is known in which data are transmitted to a handset by means of leaky waveguides.

From the DE 21 29 091 A is a slotted coaxial cable known, which is used for position detection.

Of the Invention is therefore based on the object, a system with electrical Develop cables while avoiding the aforementioned disadvantages. In particular, should as possible few components are necessary and as material-saving as possible inexpensive Arrangement are shown.

According to the invention Task in the system according to the features specified in claim 1 solved.

Important features in the system are that it comprises at least one stationary part and one mobile part, which is movable relative to the stationary part and at least can be supplied with energy and information from the stationary part,
wherein the movable part comprises an antenna device for at least receiving the electromagnetic radiation emerging from an electrical cable, which is connected to a receiving and evaluating unit for determining the received information,
wherein the movable part comprises a sensor for detecting the field strength of the electromagnetic radiation emerging from the electrical cable,
wherein the sensor is connected to an evaluation unit for position detection,
wherein the electrical cable is designed as a coaxial conductor and comprises at least one inner conductor, which is surrounded by at least one insulator, and at least one shielding conductor, which surrounds the insulator and is surrounded by an electrically insulating outer jacket,
wherein the shield conductor has a longitudinal slot with varying width in the axial direction, ie in the cable direction,
wherein a single means is provided as antenna device and sensor.

From The advantage here is that the coaxial cable for information transmission and as a standard for the linear Position is usable.

Because a single means provided as an antenna device and sensor is advantageous in that funds are saved.

at According to an advantageous embodiment, the evaluation unit for Position detection a counting unit. The advantage here is that in a simple and cost-effective Way the intensity fluctuations countable are and thus the position can be determined.

at an advantageous embodiment is the only means as a subsection a trace on a board executed. It is advantageous that a cost-effective Mass production executable is, as usual with boards.

Advantageous usable for the invention is an electrical cable having at least one inner conductor, which is surrounded by at least one insulator, and at least one Umbrella conductor surrounds the insulator and from an electrical insulating outer jacket is surrounded, wherein the shield conductor in the axial direction, ie in Cable direction, spaced apart recesses.

From The advantage here is that not only information is transferable but also a position detection by counting the intensity fluctuations allows is. In particular, as possible few components are available and it becomes material-saving material saved the screen. Furthermore is also a position detection systems, such as scale or like, saved. Therefore, the arrangement is inexpensive to carry out.

at In an advantageous embodiment, the recesses are at regular intervals from each other objected. The advantage here is that by counting a Distance is measurable.

In an advantageous embodiment, the recesses are rectangular or elliptical ge shaped. The advantage here is that with rectangular shape, the changes in the intensity of the electromagnetic radiation along the cable direction are very pronounced and thus a good signal-to-noise ratio can be achieved.

Further Advantages emerge from the subclaims.

1

outer sheath

2

shieldwires

3

rectangular recesses

4

insulator

5

inner conductor

6

sensor

7

evaluation

8th

handset

The The invention will now be explained in more detail with reference to an illustration:

In the 1 is shown an advantageously usable for the invention electrical cable, which consists of an outer sheath 1 consists, which is designed electrically insulating and the shield conductor 2 surrounds which rectangular recesses 3 having. In its interior is one of an insulator 4 surrounded inner conductor 5 intended.

When feeding high-frequency alternating currents into the electrical cable thus occurs electromagnetic radiation in particular from the rectangular recesses 3 out. Because these rectangular recesses 3 are regularly spaced from each other, varies the intensity of the exiting radiation along the direction of the cable, so the axial direction periodically.

The system according to the invention comprises at least one stationary part and one mobile part 8th which is movable relative to the stationary part and is at least supplied with energy and information from the stationary part. The power supply is non-contact, for example according to the of DE 195 12 107 A1 known system for contactless energy transfer. The stationary part includes the electrical cable.

The information is transmitted by means of the alternating currents fed into the cable, since the radiation emerging from the recesses from an antenna of the mobile part 8th received and demodulated.

Of the movable part thus includes an antenna device for at least Receiving the emerging from the electrical cable electromagnetic Radiation, with a receiving and evaluation unit for determination the received information is connected.

The movable part further comprises a sensor 6 for detecting the field strength of the electromagnetic radiation emerging from the electrical cable. This sensor 6 is with an evaluation unit 7 connected to the position detection.

In the particularly advantageous embodiment according to 1 is the sensor 6 at the same time provided as an antenna device and the evaluation unit 7 also includes the reception and evaluation unit. Thus, no other parts are necessary and the invention is inexpensive to carry out.

In further embodiments of the invention are also instead of the rectangular recesses 3 differently shaped recesses providable. It is also a longitudinal slot with varying width vorsehbar. It is essential that the recesses are such that the intensity of the exiting electromagnetic radiation along the cable direction varies periodically with a known period length. Thus, determining the position by means of determining the maxima and minima or the course of the intensity is made possible.

Claims (3)

System, with an electrical cable, full at least one dormant part and a handset relative to stationary part is movable and at least with energy and information can be supplied from the dormant part, being the moving one Part of an antenna device for at least receiving the from a electrical cable comprises emanating electromagnetic radiation, with a receiving and evaluation unit for determining the received Information is connected, wherein the movable part a Sensor for detecting the field strength the emerging from the electrical cable electromagnetic Includes radiation, wherein the sensor with an evaluation unit connected to position detection, where the electric Cable designed as a coaxial conductor is and at least one inner conductor, by at least one insulator is surrounded, and at least one shield conductor comprising the insulator surrounds and is surrounded by an electrically insulating outer sheath, in which the shield conductor in the axial direction, ie in the cable direction, a longitudinal slot having varying width, being a single agent is provided as an antenna device and sensor. System according to claim 1, characterized in that the evaluation unit for position detection a counting unit includes. System according to claim 1, characterized in that the only means as a subsection of a trace on one Board executed is.