Receiver for the reception of wirelessly transmitted information

• US 5,559,499 A
• Filed: 08/01/1994
• Issued: 09/24/1996
• Est. Priority Date: 01/31/1992
• Status: Expired due to Term

• Current Assignee: Robert Bosch GmbH
• Original Assignee: Robert Bosch GmbH
• Inventors: Haubner, Georg
• Primary Examiner(s): Peng, John K.
• Assistant Examiner(s): MANNAVA, ASHOK K
• Application Number:
  US08/256,982
• Time in Patent Office: 785 Days
• Field of Search: 340/635, 340/636, 341/173, 341/178, 341/183, 371/25.1, 455/38.3, 455/38.4, 455/127, 455/343, 455/353
• US Class Current: 340/636.1
• CPC Class Codes: G08B 29/181 due to failing power supply
• CPC Class Codes: G08C 25/00 Arrangements for preventing or correcting errors; Monitoring arrangements

Abstract

The invention is directed to a receiver for receiving information transmitted without the use of wires, in particular by infrared light signals. The information is transmitted by a battery-operated transmitter provided with a display unit which delivers an appropriate signal depending on the completeness of the information (FIG. 1).

Claims

1. A receiver for receiving information transmitted without the use of wires by infrared signals, which information is transmitted by a battery-operated transmitter in form of at least one information word including a plurality of bits, the receiver comprising an evaluating unit which evaluates received pulses and recognizes from the received pulse a diminishing of a battery capacity in a sending device;

a display unit controlled for sending a warning signal when said evaluating unit recognizes a diminishing of the battery capacity of the sending device, said evaluating unit being designed so that it determines during a receiving process at least a number of completely received information words, said display unit being controlled for sending the warning signal when the number of the completely received information words is smaller than a predetermined reference value thus indicating the diminishing of the battery capacity.

2. A receiver as defined in claim 1, wherein the receiver is formed so that it waits for a synchronized period between the individual information words when receiving a plurality of the information words.

3. A receiver as defined in claim 1, wherein the receiver is formed so that it successively increases a time counter between the received signals.

4. A receiver as defined in claim 1, wherein said receiver is formed so that it compares a status of a time counter with predetermined limiting values, and results of the comparison establish a respective bit state of a received information.

5. A receiver as defined in claim 1, wherein said receiver is formed so that it compares a status of a time counter with predetermined limiting values, and results of the comparison establish a completeness of a received information.

6. A receiver as defined in claim 1;

and further comprising a video screen, said screen unit being electrically coupled with said video screen and the warning signal is displayed on said video screen.

7. A receiver as defined in claim 1, wherein said evaluating unit after the receipt of a pulse activates the display unit for sending a signal which displays arrival of the information words.

8. A receiver as defined in claim 1, wherein the reference value is a word which is produced from learning of a number of the received information words.