1.-16. (canceled)
17. A method for adjusting a transmission time of a continuous wave (CW), comprising:
setting an initial value for a response waiting time;
sending the CW to a tag after sending a command to the tag and waiting for a response from the tag; and
judging whether the response from the tag is received within the response waiting time,
wherein if the response from the tag is received within the response waiting time, then stopping sending the CW and adjusting the response waiting time; and
wherein if the response from the tag is not received beyond the response waiting time, then stopping sending of the CW.
18. The method as claimed in claim 17, wherein said step of setting an initial value for a response waiting time comprises setting an initial value of the response waiting time to an arbitrary value.
19. The method as claimed in claim 18, wherein said arbitrary value is one of less than and equal to a maximum response waiting time provided in a radio frequency identification protocol.
20. The method as claimed in claim 17, wherein said command is a command instructing the tag to modify one of data or a flag bit in the tag.
21. The method as claimed in claim 20, wherein said command instructing the tag to modify the one of data or the flag bit in the tag comprises one of a write command, a kill command, a lock command a block-write command and a block-erase command.
22. The method as claimed in claim 17, wherein said adjusting the response waiting time comprises:
recording a time from sending out the command to receiving the response from the tag, and
adjusting the response waiting time according to the recorded time.
23. The method as claimed in claim 22, wherein said adjusting the response waiting time according to the recorded time comprises adjusting the response waiting time in accordance with the following relationship:
Tout(n)=\u03b1Tout(n\u22121)+(1\u2212\u03b1)Ts\u2003\u2003Eq. (1)
wherein Tout(n\u22121) is the response waiting time before the adjustment, Tout (n) is the response waiting time after the adjustment, Ts is the recorded time from sending out the command to receiving the response from the tag, and \u03b1 is an adjustment factor with a value range of 0, 1.
24. The method as claimed in claim 17, wherein said adjusting the response waiting time comprises adjusting the response waiting time in accordance with at least one of at least one piece of inherent information in the tag and statistical information of the tag’s operations.
25. The method as claimed in claim 24, wherein said inherent information in the tag is information determined during the tag’s manufacturing process, said information comprising at least a type and a serial number of the tag, a model number and manufacturer of the tag’s chip; and
said statistical information of the tag’s operations is the information obtained statistically during a process when the tag is performing various operations, the statistical information comprising at least a number of times of receiving the tag’s response, a number of times for timeout, and a time recorded by the reader from sending out a command to receiving a response from the tag.
26. The method as claimed in claim 17, further comprising subsequent to the response from the tag is being not received beyond the response waiting time, stopping sending the CW and adjusting the response waiting time.
27. The method as claimed in claim 26, wherein said adjusting the response waiting time comprises increasing the response waiting time.
28. The method as claimed in claim 27, wherein said increasing the response waiting time comprises:
adjusting the response waiting time according to the following equation:
Tout(n)=minTout(n\u22121)\xd72,20 ms
wherein Tout(n\u22121) represents the response waiting time before the adjustment, Tout(n) represents the response waiting time after the adjustment, and min represents an operation of taking a minimum value.
29. The method as claimed in claim 27, wherein said increasing the response waiting time comprises:
adjusting the response waiting time in accordance with the following relationship:
Tout(n)=minTout(n\u22121)+\u03bb,20 ms
wherein Tout(n\u22121) represents the response waiting time before the adjustment, Tout(n) represents the response waiting time after the adjustment, \u03bb is a pre-set adjusting step length \u03bb, and min represents an operation of taking a minimum value.
30. A reader, comprising:
a response waiting time setting unit for pre-setting an initial value for a response waiting time;
a command processing unit for sending out a command to a tag and sending a continuous wave (CW) to the tag after sending the command and waiting for a response from the tag; and
a response waiting time adjusting unit for adjusting the response waiting time;
wherein if the response from the tag is received by the command processing unit within the response waiting time, a response waiting time adjusting unit is triggered to adjust the response waiting time; and
wherein if the response from the tag is not received within the response waiting time, sending of the CW is stopped.
31. The reader as claimed in claim 30, wherein said command processing unit further triggers the response waiting time adjusting unit to adjust the response waiting time when the response from the tag is not received within the response waiting time.
32. The reader as claimed in claim 30, wherein said response waiting time adjusting unit comprises:
a response waiting time recording module for recording the time from sending out the command by the command processing unit to receiving the response from the tag; and
a response waiting time adjusting module for adjusting the response waiting time according to the time recorded by the response waiting time recording module.
The claims below are in addition to those above.
All refrences to claim(s) which appear below refer to the numbering after this setence.
1. A control valve for connection unit for flexible pipes, comprising a plurality of sectors rotatable between a completely open position and a completely closed position, wherein said plurality of sectors comprises at least two series of sectors of different shape and dimensions disposed in an alternate way along the circumference of the connection unit; wherein the at least two series of sectors includes a series of sector of a larger size relative to the other series of sectors and series of sectors of a smaller size a relative to the other series of sectors, wherein each sector of the series of sectors of the larger size have a V-shaped extremity whose sides, when in the completely closed position, abut in a fluid tight fit manner against corresponding sides of adjacent sectors of the same series, and have lateral sides with an arched extremity that, when in the completely closed position, is leaned on by an adjacent side of a sector from the series of sectors of the smaller size that is interposed between two sectors from the series of the sectors of the larger size, and wherein each sector of the series of sectors of the smaller size have a rounded extremity that, when in the completely closed position, engages tightly with the arched extremities of two adjacent sectors from the series of sectors of the larger size, and have straight sides that, in the completely closed position, engage tight with lateral sides of the two adjacent sectors from the series of sectors of the larger size.
2. The control valve according to claim 1, wherein the valve is an upstream control valve of the connection unit in the direction of flow of the fluid, and the sectors from the series of the smaller size are driven to close slowly with respect to the sectors from the series of the larger size.
3. The control valve according to claim 1, wherein said arched extremity, said rounded extremity, and said straight sides have a step so as to consent a partial overlapping of borders of the adjacent sectors for increasing tightness between the sectors thereof.
4. A control valve for connection unit of flexible pipes, comprising a plurality of petal sectors rotatable between a completely open position and a completely closed position, wherein said plurality of petal sectors comprises at least two series of sectors of different shape and dimensions disposed in an alternate way along a circumference of the connection unit; wherein the at least two series of sectors includes a series of sectors of a larger size relative to the other series of sectors and a series of sectors of a smaller size relative to the other series of sectors, wherein the sectors of the control valve have substantially triangular shapes of different size with bases rotatable about respective pivoting axes arranged as sides of polygonal figure perpendicular to a longitudinal axis of the connection unit.
5. The control valve according to claim 4, wherein the valve is an upstream control valve of the connection unit in the direction of flow of the fluid, and the sectors from the series of the smaller size are driven to close slowly with respect to the sectors from the series of the larger sizes.
6. The control valve according to claim 4, wherein the sectors of bigger dimensions have a V-shaped extremity, whose sides, when in the completely closed positions, abut in a fluid tight fit manner against corresponding sides of adjacent sectors of the same series and have lateral sides with an arched extremity that, when in the completely closed position, is leaned on by an adjacent side of a sector from the series of sectors of the smaller size that is interposed between two sectors from the series of sectors of the larger size, and wherein each sector of the series of the smaller size have a rounded extremity and straight sides that, when in the completely closed position, engage tight with lateral sides of the two adjacent sectors from the series of sectors of the larger sizes.
7. The control valve according to claim 6, wherein said arched extremity, said rounded extremity, and said straight sides have a step so as to consent a partial overlapping of borders of the adjacent sectors for increasing tightness between the sectors thereof.