IPC분류정보
국가/구분 |
United States(US) Patent
등록
|
국제특허분류(IPC7판) |
|
출원번호 |
US-0564596
(2000-05-03)
|
우선권정보 |
DE-0020299 (1999-05-03) |
발명자
/ 주소 |
- Rumpler, Gerhard
- Kahle-Nobis, Gerhard
- Meier, Christof
|
출원인 / 주소 |
- Siemens Aktiengesellschaft
|
대리인 / 주소 |
|
인용정보 |
피인용 횟수 :
10 인용 특허 :
6 |
초록
▼
The use of radio technology for transmission of EMERGENCY-OFF, START-, STOP- and process and confirmation signals from industrial processing machines, such as numerically controlled machine tools and robots, by radio is described. There is no need for any additional safety measures for the START and
The use of radio technology for transmission of EMERGENCY-OFF, START-, STOP- and process and confirmation signals from industrial processing machines, such as numerically controlled machine tools and robots, by radio is described. There is no need for any additional safety measures for the START and process signals by means of a confirmation signal, provided the control functions satisfy appropriate safety requirements. To this end, safety-relevant signals are physically detected on at least two channels at the transmitter end, the detected data are logically transmitted by at least two channels using a safety technique by radio to a receiver end, and the received data are likewise physically processed and monitored on at least two channels at the receiver end. In addition to the safety-related signal data, additional protection data are produced for monitoring purposes and are used at the receiver end for monitoring by checking the plausibility of a redundant value for data protection and by cross-comparison of the evaluation results, etc.
대표청구항
▼
The use of radio technology for transmission of EMERGENCY-OFF, START-, STOP- and process and confirmation signals from industrial processing machines, such as numerically controlled machine tools and robots, by radio is described. There is no need for any additional safety measures for the START and
The use of radio technology for transmission of EMERGENCY-OFF, START-, STOP- and process and confirmation signals from industrial processing machines, such as numerically controlled machine tools and robots, by radio is described. There is no need for any additional safety measures for the START and process signals by means of a confirmation signal, provided the control functions satisfy appropriate safety requirements. To this end, safety-relevant signals are physically detected on at least two channels at the transmitter end, the detected data are logically transmitted by at least two channels using a safety technique by radio to a receiver end, and the received data are likewise physically processed and monitored on at least two channels at the receiver end. In addition to the safety-related signal data, additional protection data are produced for monitoring purposes and are used at the receiver end for monitoring by checking the plausibility of a redundant value for data protection and by cross-comparison of the evaluation results, etc. is based on correlations. 2. The method of claim 1, wherein the M and the N are 9 and 12, respectively. 3. The method of claim 2, wherein the unbalanced codewords have a Hamming weight of 5 or 7, wherein the Hamming weight 7 is obtained by complementing the codewords of Hamming weight 5. 4. The method of claim 3, wherein the codewords belonging to a set of codewords have a minimum Hamming distance 4. 5. The method of claim 4, wherein the number of states in the trellis are 8. 6. A recoding medium containing data encoded by the method of claim 1. 7. A method for decoding a codeword, which is encoded by the method of claim 1, from a series of data word representing intensities of an analog signal, comprising steps of: receiving the data word; calculating branch metrics between the data word and each codeword in the codeword set classified by the state transition in the trellis to obtain minimum branch for each bottom states; figuring out path metric for each bottom state based on the calculated branch metrics to select a minimum path metric thereamong for each bottom state in the trellis; selecting a best path having the smallest path metric of the calculated path metrics; tracing back the selected best path and decoding a codeword corresponding to a state transition into a message word by using the codeword ID in the codebook. 8. The method of claim 7, wherein the data word is output from a volume holographic storage device. 9. The method of claim 8, wherein the unbalanced codewords have a Hamming weight of 5 or 7, wherein the Hamming weight 7 is obtained by complementing the codewords of Hamming weight 5. 10. The method of claim 9, wherein the codewords belonging to a set of codewords have a minimum Hamming distance 4. 11. The method of claim 10, wherein the number of states in the trellis are 8.
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