摘要:
In order to achieve an optimal identification with an identification device for objects that comprise a transponder and are transported by means of a conveyor device through a closed tunnel (2), it is proposed that the antenna device of the transmitting and receiving device (10) comprises at least three sequentially arranged coil-shaped antennas (4, 6, 8). They surround the tunnel (2), each lying in a plane and representing a linearly independent system. The antennas (4, 6, 8) are operated in a multiplexer mode.
摘要:
The invention relates to a radio frequency (RF) system and method for improving the detection efficiency of an identification system including a transponder and a reader. The system (1) comprises an interrogator reader device (3) having an interrogator coil antenna (4) and a transponder (2) having a transponder coil antenna (5) and a microchip (6) Advantageously, the interrogator reader device (3) comprises a detection portion (11) including a sensitive signal gain detector (SSGN) for detecting just the presence of the transponder coil antenna (5) in case of misplacement of the transponder or broken link between the transponder coil antenna (5) and the microchip (6). The invention allows remedying to those potentially dangerous situations that might lead to a misdetection of the transponder (2).
摘要:
An optical fiber tap is described which comprises a beamsplitter formed by positioning bevelled, parallel endfaces of two segments of optical fiber in coaxial alignment and in close proximity to each other. A suitable dielectric film, such as air, fills the gap between the endfaces. Light propagating into the tap from the first fiber segment is partially reflected and partially refracted at the bevelled endfaces. The refracted portion enters the second fiber segment and the reflected portion leaves the tap and is detected by a photodetector. By choice of the proper angle for the bevelled endfaces, the tap can be made substantially mode independent. A greater degree of mode independence can be obtained by interposing a steady-state mode exciter between the light source and the beamsplitter. The tap is particularly useful for semiconductor junction laser stabilization by the feedback arrangement described herein since the ratio of the intensity of the reflected portion to that of the refracted portion is substantially constant. A package assembly for use in the feedback arrangement is also described.
摘要:
The invention relates to a method for determining of at least an order of objects O1,O2 transported by a conveyor 1 along a conveyor path 2, wherein each of the objects O1,O2 carries an assigned transponder T1,T2 having a characterizing code.At least a first radio frequency identification reader R1—having at least a first reader-antenna A1 for generating a first reading field F1—is arranged with respect to the conveyor 1 and built for identifying the transponders T1,T2 of the transported objects O1,O2 passing along or through the first reading field F1. The following steps are performed: reading out the codes of the transponders T1,T2 by the first reader R1 and generating detection-signals as long as the respective transponder T1,T2 is detectable by the first reader R1, saving the detection-signals linked with a time information, deriving a mean first point of time for each detected transponder T1,T2 from the saved detection-signals and the time information linked therewith by an assessment method—wherein the first points of time indicate an estimated discrete point of time for each transponder of passing the first reader R1—and determining the order of the objects O1,O2 on the conveyor 1 according to the first points of time of each transponder T1,T2.
摘要:
The invention relates to a method for determining of at least an order of objects O1,O2 transported by a conveyor 1 along a conveyor path 2, wherein each of the objects O1,O2 carries an assigned transponder T1,T2 having a characterizing code.At least a first radio frequency identification reader R1—having at least a first reader-antenna A1 for generating a first reading field F1—is arranged with respect to the conveyor 1 and built for identifying the transponders T1,T2 of the transported objects O1,O2 passing along or through the first reading field F1. The following steps are performed: reading out the codes of the transponders T1,T2 by the first reader R1 and generating detection-signals as long as the respective transponder T1,T2 is detectable by the first reader R1, saving the detection-signals linked with a time information, deriving a mean first point of time for each detected transponder T1,T2 from the saved detection-signals and the time information linked therewith by an assessment method—wherein the first points of time indicate an estimated discrete point of time for each transponder of passing the first reader R1—and determining the order of the objects O1,O2 on the conveyor 1 according to the first points of time of each transponder T1,T2.
摘要:
The invention relates to a radio frequency (RF) system and method for improving the detection efficiency of an identification system including a transponder and a reader.The system (1) comprises an interrogator reader device (3) having an interrogator coil antenna (4) and a transponder (2) having a transponder coil antenna (5) and a microchip (6) Advantageously, the interrogator reader device (3) comprises a detection portion (11) including a sensitive signal gain detector (SSGN) for detecting just the presence of the transponder coil antenna (5) in case of misplacement of the transponder or broken link between the transponder coil antenna (5) and the microchip (6).The invention allows remedying to those potentially dangerous situations that might lead to a misdetection of the transponder (2).
摘要:
A solid state electrical switch is described which exhibits high off/on resistance ratios and low insertion loss. An additional advantage is that removal of the switching energy does not alter the status (off or on) of the switch. The active solid state material in the switch is an electrochromic material (e.g., tungsten trioxide) which undergoes a transformation from insulator to metallic conductor on injection of certain ions.