Method for data transmission in a vehicle

• US 6,373,375 B1
• Filed: 11/17/1999
• Issued: 04/16/2002
• Est. Priority Date: 01/29/1997
• Status: Expired due to Fees

• Current Assignee: Robert Bosch GmbH
• Original Assignee: Robert Bosch GmbH
• Inventors: Hoetzel, Juergen, Tschiskale, Ega
• Primary Examiner(s): TRIEU, VAN THANH
• Application Number:
  US09/355,537
• Time in Patent Office: 881 Days
• Field of Search: 340/310.01, 340/310.02, 340/310.05, 340/310.07, 340/310.08, 340/825.06, 340/538, 340/431, 340/870.01, 340/825.07, 307/10.1, 307/10.6, 307/9.1
• US Class Current: 340/425.5
• CPC Class Codes: B60Q 9/006 using a distance sensor
• CPC Class Codes: H04B 2203/5458 Monitor sensor; Alarm systems
• CPC Class Codes: H04B 2203/547 via DC power distribution
• CPC Class Codes: H04B 3/54 Systems for transmission via power distribution lines
• CPC Class Codes: H04B 3/548 the power on the line being DC arrangements for feeding power H04L12/10; extracting feeding power from signals H04L25/02

Abstract

A method for data transmission from control devices to a display, which also makes possible retrofitting of a reversing aid system since it transmits the data via existing supply line(s) of further electrical loads.

Claims

1. A method for transmitting data by a plurality of control devices in a vehicle which receive and analyze the data for a reversing aid, comprising the steps of:

transmitting the data to be displayed from the control devices to a display unit in the vehicle via at least one display unit electrical supply line;

supplying the control devices with power via at least one control device electrical supply line of an electrical load in the vehicle; and

defining a ranking of the control devices for transmitting the data.

2. The method according to claim 1, wherein the at least one display unit electrical supply line and the at least one control device electrical supply line are the same line.

3. The method according to claim 1, wherein the at least one control device electrical supply line includes a first line of the electrical load and the at least one display unit electrical supply line includes a second line of a further electrical load, the first line being different from the second line.

4. The method according to claim 1, wherein the at least one display unit electrical supply line includes a plurality of electrical supply lines corresponding to the plurality of control devices for separately transmitting the data of the plurality of control devices.

5. The method according to claim 1, wherein the control devices include a first control device and a second control device, the first control device being situated at an end of a supply line, the first control device beginning a data transmission after an initialization, the second control device beginning a data transmission after a delay period if the second control device is not detected by the first control device.

6. The method according to claim 5, wherein, after the delay period, the second control device detects the data on at least one supply line by way of a detection system, and is muted after detecting the data of the first control device.

7. The method according to claim 5, wherein, within the delay period, the second control device detects an additional power consumption on a supply line, and is muted after detecting the additional power consumption by the first control device.

8. The method according to claim 5, wherein voltage is supplied to the plurality of control devices only when the vehicle is moving in a reverse direction.

9. The method according to claim 1, further comprising the step of modulating the data using a frequency shift keying technique.