CN104156742A - Automatic antenna adjusting device - Google Patents
Automatic antenna adjusting device Download PDFInfo
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- CN104156742A CN104156742A CN201410387630.9A CN201410387630A CN104156742A CN 104156742 A CN104156742 A CN 104156742A CN 201410387630 A CN201410387630 A CN 201410387630A CN 104156742 A CN104156742 A CN 104156742A
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Abstract
The invention provides an automatic antenna adjusting device. The automatic antenna adjusting device comprises a controller, wherein pulse signals are sent to a stepping motor by the controller; the stepping motor rotates for a stepping angle to enable a reader-writer to move for distance when receiving a pulse signal; the reader-writer receives radio-frequency signals sent by an electronic tag and works out the RSSI (Received Signal Strength Indicators) of the electronic tag based on the radio-frequency signals when moving for the distance every time; the controller receives the RSSI transmitted by the reader-writer in sequence and judges whether the RSSI is zero or not; when the RSSI is zero, the controller stops sending the pulse signals and selects one RSSI with the biggest numerical value from the RSSI ordered by the receiving sequence; the controller calculates the times of sending the pulse signals again and sends reverse signals and the times of the pulse signals to the stepping motor; the times is the difference of the number of the RSSI received by the controller and a sequence digit corresponding to the RSSI with the biggest numerical value, so that the antennae can be adjusted to the optimal position relative to the electronic tag automatically.
Description
Technical field
The present invention relates to electronic tag and read write line, particularly the Antennaautoadjust device of the relative position between a kind of automatic adjustment reading and writing device antenna and electronic tag.
Background technology
Due to ultra-high frequency wireless electricity wave reflection, diffraction and its around physical construction block and the difference of electronic tag kind all can affect the optimal antenna position of electronic tag, so can find that in practice the antenna of read write line is with respect to the Bu middle, optimum position of electronic tag, but slightly have skew.In addition in order to save cost, the spacing that the manufacturer of electronic tag can dwindle the size of electronic tag and reduce electronic tag, this also can limit the antenna of read write line greatly with respect to the optimum position of electronic tag, even sometimes for find an ideal position repeatedly mobile reading and writing device antenna with respect to the position of electronic tag, waste the plenty of time.
Summary of the invention
The technical problem to be solved in the present invention is cannot adjust rapidly and accurately read write line to the defect at the optimal antenna position place with respect to electronic tag in order to overcome in prior art, provides a kind of read write line of can adjusting fast, easily and accurately to the Antennaautoadjust device at the optimal antenna position place with respect to electronic tag.
The present invention solves above-mentioned technical matters by following technical proposals:
The invention provides a kind of Antennaautoadjust device, it comprises the first mobile device that makes a read write line that comprises antenna and to be sticked the travelling belt of electronic tag moves horizontally, this read write line is positioned at the below of this electronic tag, its feature is, it also comprises the second mobile device and the controller that this read write line is moved with respect to this electronic tag;
This second mobile device comprises that a stepper motor, a shaft coupling, a screw, are arranged with this screw and make the screw mandrel of this screw traveling priority and a fixed cover be located at the supporting seat on this screw, this read write line is fixed on this supporting seat, and this stepper motor is connected with this screw mandrel by this shaft coupling;
This controller for a fixed frequency transmitted signal to this stepper motor, this stepper motor often receives pulse signal and rotates a step angle, so that this read write line transverse shifting one distance;
This read write line for every movement this apart from time, receive the radiofrequency signal that this electronic tag sends the RSSI (received signal strength indicator) that calculates this electronic tag according to this radiofrequency signal, wherein, received signal strength indicator refers to the difference of the inter-stages such as real received signal strength and optimum received signal strength, its realization, oppositely carrying out after receiving cable base band receiving filter, mainly refers to the signal intensity of tag reflection signal in passive radio frequency identification system read write line;
The RSSI that this controller also comes for receiving successively this read write line transmission, and judge whether RSSI is zero, and when RSSI is zero, this controller stops transmitted signal, and from the RSSI sequentially sorting according to reception, filters out the RSSI of numerical value maximum;
This controller is also for calculating the number of times of transmitted signal again, successively send the pulse signal of this number of times of a reverse signal and this fixed frequency to this stepper motor thereafter, this stepper motor rotates to drive this read write line transverse shifting, wherein, this number of times is received the poor of the number of RSSI and sequence figure place corresponding to the RSSI of numerical value maximum for this controller.
The present invention realizes reading and writing device antenna is adjusted to the optimum position with respect to electronic tag automatically, and concrete principle of work is:
This controller with a certain fixed frequency transmitted signal to this stepper motor, this stepper motor often receives a pulse signal and just rotates a step angle, the rotation drive of this stepper motor and the rotation of the screw mandrel of this stepper motor mechanical connection, because this nut sleeve is located on this screw mandrel, and the internal thread of this screw mates mutually with the external thread of this screw mandrel, so this screw is done rectilinear motion along this screw mandrel direction when this screw mandrel rotates, the traveling priority of this screw drives also traveling priority of this supporting seat simultaneously, the read write line being fixed on this supporting seat is also done traveling priority.Thus, this stepper motor often receives a pulse signal and just makes the certain distance of this read write line transverse shifting, every movement this apart from time, this read write line just receives the radiofrequency signal that this electronic tag sends the RSSI that calculates this electronic tag according to this radiofrequency signal.
This read write line often calculates a RSSI value and just transmits it to this controller, this controller receives the RSSI that this read write line transmission comes successively, and often receive a RSSI value and just judge whether a RSSI is zero, continue transmitted signal when non-vanishing to this stepper motor judging RSSI, when judging RSSI and be zero, this read write line has moved to the other end of this electronic tag and has surpassed the other end of this electronic tag from one end of this electronic tag, this controller stops transmitted signal, and from the RSSI sequentially sorting according to reception, filter out the RSSI of numerical value maximum, this read write line corresponding to the RSSI of this numerical value maximum is that this read write line is with respect to the optimal antenna position of this electronic tag with respect to the position of this electronic tag, the signal intensity of this electronic tag receiving at this this read write line of optimal antenna position place is the strongest.
After this this controller is controlled this read write line and is back to this optimal antenna position, be specially: this controller calculates the difference that this controller is received the number of RSSI and sequence figure place corresponding to the RSSI of numerical value maximum, this difference is exactly this controller number of times of transmitted signal again, thereafter the pulse signal of this number of times that this controller successively sends a reverse signal and this fixed frequency is to this stepper motor, this stepper motor counter-rotation, and then drive this read write line traveling priority in the other direction, send the pulse signal of this number of times at this controller after, stop transmitted signal, this stepper motor also stops operating, now this read write line moves to this optimal antenna position place.
Preferably, this second mobile device also comprises a support that contains base, the first back up pad and the second back up pad, this first back up pad and this second back up pad are installed on this base, the rotating shaft of this stepper motor wears this back up pad and is connected with one end of this screw mandrel by shaft coupling, and the other end of this screw mandrel wears this second back up pad.
Preferably, the rotating shaft of this stepper motor is connected with the main drive shaft of this shaft coupling, and the driven shaft of this shaft coupling is connected with one end of this screw mandrel.
Preferably, this support also comprises parallel the 3rd back up pad between this first back up pad and this second back up pad, and this screw mandrel wears the 3rd back up pad.
Preferably, this supporting seat comprises that a track base and is fixed on the worktable on track base, and this read write line is fixed on this worktable, and this track base fixed cover is located on this screw.
Preferably, this second mobile device also comprises an orienting lug, offers an elongated slot on this worktable, and the bottom of this orienting lug is embedded in this elongated slot movably, and the top of this orienting lug is fixed with this read write line.
Preferably, this second mobile device also comprises a fixture, and one end of this fixture wears this elongated slot and withstands this orienting lug.
Before moving this read write line along this screw mandrel direction, also need to adjust this read write line with respect to the front and back position of this electronic tag the vertical direction of this screw mandrel direction (perpendicular to), be specially:
When this orienting lug moves along this vertical direction in this elongated slot, this read write line also moves along this vertical direction thereupon, when this read write line moves to a certain position of below of this electronic tag along this vertical direction, the signal that this reading and writing device antenna can receive is maximum, thereby at this moment by this screw, wearing this elongated slot again and withstanding this orienting lug to move this read write line, this read write line is fixed can receive position corresponding to peak signal, this will be conducive to follow-up at this read write line during along this screw mandrel direction transverse shifting, after each mobile this distance, can receive better the radiofrequency signal that this electronic tag sends.
Preferably, this fixture is a screw, it will be understood by those of skill in the art that this fixture is not limited to screw selected in this programme, the substitutions of elements that can also select other for example screw as fixture.
Preferably, this read write line is used for producing a feedback signal in the RSSI that calculates this electronic tag, and this feedback signal is transferred to this controller.
This first mobile device comprises that one is located at the unwinding device of this travelling belt on its (referring to unwinding device) for pulling out volume, one the first reverse wheel for this travelling belt conversion direction on (referring to the first reverse wheel) that will be sticked at it, one draw-gear for this travelling belt along continuous straight runs is moved, one for by the second reverse wheel of this travelling belt conversion direction on (referring to the second reverse wheel) that is sticked at it and for rolling the wrap-up that is located at this travelling belt on its (referring to wrap-up), wherein this draw-gear comprises two traction wheels, these two traction wheels are sticked respectively at the upper surface of this travelling belt and lower surface for this travelling belt of sandwiched.
Meeting on the basis of this area general knowledge, above-mentioned each optimum condition, can combination in any, obtains the preferred embodiments of the invention.
Positive progressive effect of the present invention is:
Antennaautoadjust device of the present invention, in the situation that electronic tag is relatively static, automated movement read write line tests out the RSSI value of electronic tag simultaneously automatically with respect to the diverse location place of electronic tag at read write line, then by comparing these RSSI values, compare out reading and writing device antenna with respect to the optimal antenna position of electronic tag, and read write line is moved to this optimal antenna position place.The present invention can adjust read write line to respect to the optimal antenna position place of electronic tag fast, easily and accurately by this device, not only reaches accurately, saves time and laborsaving, has also reduced operating personnel's operation easier.
Accompanying drawing explanation
Fig. 1 is the structural representation of the Antennaautoadjust device of preferred embodiment of the present invention.
Fig. 2 is the stereographic map of the second mobile device in the Antennaautoadjust device of preferred embodiment of the present invention.
Fig. 3 is the structural representation of the second mobile device of preferred embodiment of the present invention.
Fig. 4 is that the read write line of preferred embodiment of the present invention is with respect to the position of electronic tag and the corresponding relation figure of RSSI.
Embodiment
Mode below by embodiment further illustrates the present invention, but does not therefore limit the present invention among described scope of embodiments.
Shown in figure 1, the present embodiment provides a kind of Antennaautoadjust device, and it comprises the second mobile device 4 and a controller (not shown) that the first mobile device 3, of making a read write line that comprises antenna 1, to be sticked the travelling belt 5 of electronic tag 2 moving horizontally makes this read write line 1 move with respect to this electronic tag 2.Wherein, this read write line 1 is positioned at the below of this electronic tag 2, and this electronic tag 2 is a RFID (radio-frequency (RF) identification) electronic tag.
Continue to see Fig. 1, this first mobile device 3 comprises a unwinding device 31, one first reverse wheel 32, a draw-gear 33, one second reverse wheel 34 and a wrap-up 35, this draw-gear 33 comprises two traction wheels, and these two traction wheels are separately positioned on upper surface and the lower surface of this travelling belt 5.
Wherein, this travelling belt 5 that this unwinding device 31 can make because of the rotation of self volume establish thereon is evenly pulled out with certain tension force; This travelling belt 5 that this first reverse wheel 32 makes to be sticked thereon for the rotation because of self is converted to horizontal direction by vergence direction; This draw-gear 33 is for this travelling belt 5 of sandwiched, the traction wheel edge corresponding to upper surface of this travelling belt 5 rotates counterclockwise, and traction wheel edge corresponding to the lower surface of this travelling belt 5 clockwise rotates, these two traction wheels make this travelling belt 5 move horizontally along the direction from left to right in Fig. 1 along the rotation of different directions; This travelling belt 5 that this second reverse wheel 34 makes to be sticked thereon for the rotation because of self is converted to vergence direction by horizontal direction; This travelling belt 5 that this wrap-up 35 can make because of the rotation of self volume establish thereon is evenly rolled with certain pulling force.
This first mobile device 3 make to be sticked travelling belt 5 of this electronic tag 2 moves horizontally, and this electronic tag 2 is moved into horizontal position, and at this moment this second mobile device 4 makes this read write line 1 do level with respect to this electronic tag 2 to relatively move.
As shown in Figures 2 and 3, this second mobile device 4 comprises a support (not indicating in figure), a stepper motor 42, a shaft coupling 43, a screw mandrel 44, a screw 45, a track base 46 and a worktable 47.
Wherein, this support comprises a base 411, one first back up pad 412, one second back up pad 413 and one the 3rd back up pad 414, this first back up pad 412, this second back up pad 413 and the 3rd back up pad 414 are installed on this base 411, and this first back up pad 412, this second back up pad 413 and the 3rd back up pad 414 be arranged in parallel.
The rotating shaft of this stepper motor 42 is connected with the main drive shaft of this shaft coupling 43, and the driven shaft of this shaft coupling 43 is connected with one end of this screw mandrel 44.On this screw mandrel 44, be arranged with this screw 45 and can make this screw 45 do traveling priority, be arranged with this track base 46 on this screw 45, be fixed with this worktable 47 on this track base 46, this read write line 1 is just fixed on this worktable 47.
The rotating shaft of this stepper motor 42 runs through this first back up pad 412, and is connected with one end of this screw mandrel 44 by this shaft coupling 43, and the other end of this screw mandrel 44 wears the 3rd back up pad 414 and this second back up pad 413.
Upper mask body has been introduced the structure of this Antennaautoadjust device, illustrates below by this Antennaautoadjust device and realizes reading and writing device antenna is adjusted to the principle of work with respect to the optimum position of electronic tag automatically:
This controller with a certain fixed frequency transmitted signal to this stepper motor 42, this stepper motor 42 often receives a pulse signal and just rotates a step angle, the rotation drive of this stepper motor 42 and the rotation of the screw mandrel 44 of this stepper motor mechanical connection, because this screw 45 is set on this screw mandrel 44, and the internal thread of this screw 45 mates mutually with the external thread of this screw mandrel 44, so this screw 45 is done rectilinear motion along these screw mandrel 44 directions when this screw mandrel 44 rotates, the traveling priority of this screw 45 drives also traveling priority of this track base 46 simultaneously, drive the read write line 1 being fixed on this worktable 47 also to do traveling priority.Thus, this stepper motor 42 often receives a pulse signal and just makes this read write line 1 along the certain distance of the transverse shifting of direction from left to right in Fig. 1, every movement this apart from time, this read write line 1 just receives the radiofrequency signal that this electronic tag 2 sends the RSSI that calculates this electronic tag 2 according to this radiofrequency signal.
This read write line 1 often calculates a RSSI value and just transmits it to this controller, this controller receives the RSSI that this read write line 1 transmission comes successively, and often receive a RSSI value and just judge whether a RSSI is zero, continue transmitted signal when non-vanishing to this stepper motor 42 judging RSSI, when judging RSSI and be zero, this read write line 1 has moved to the other end of this electronic tag 2 and has surpassed the other end of this electronic tag 2 from one end of this electronic tag 2, this controller stops transmitted signal, and from the RSSI sequentially sorting according to reception, filter out the RSSI of numerical value maximum, this read write line corresponding to the RSSI of this numerical value maximum is that this read write line is with respect to the optimal antenna position of this electronic tag with respect to the position of this electronic tag, the signal intensity of this electronic tag 2 receiving at this read write line 1 of this optimal antenna position place is the strongest.
After this this controller is controlled this read write line 1 and is back to this optimal antenna position, be specially: this controller calculates the difference that this controller is received the number of RSSI and sequence figure place corresponding to the RSSI of numerical value maximum, this difference is exactly this controller number of times of transmitted signal again, thereafter the pulse signal of this number of times that this controller successively sends a reverse signal and this fixed frequency is to this stepper motor 42, these stepper motor 42 counter-rotation, and then drive this read write line 1 traveling priority in the other direction, send the pulse signal of this number of times at this controller after, stop transmitted signal, this stepper motor 42 also stops operating, now this read write line 1 moves to this optimal antenna position place.
In addition, this read write line 1 is positioned at the below of this electronic tag 2, when this read write line 1 is mobile along the vertical direction perpendicular to these screw mandrel 44 directions (this read write line 1 is along the direction perpendicular to paper direction), this read write line 1 is positioned at the signal intensity that the diverse location (for example, under, take back in below or below takes over) of these electronic tag 2 belows locates to detect and has nothing in common with each other.When this read write line 1 is positioned at a certain position of these electronic tag 2 belows, the signal intensity that this read write line 1 detects is very weak, this is the reception to radiofrequency signal when being unfavorable for that this read write line 1 moves along these screw mandrel 44 directions, that is to say, before moving this read write line along these screw mandrel 44 directions, also need to adjust this read write line with respect to the front and back position of this electronic tag the vertical direction of this screw mandrel direction (perpendicular to), this will be conducive to follow-up at this read write line during along this screw mandrel 44 direction transverse shifting, after each mobile this distance, can receive better the radiofrequency signal that this electronic tag sends.
So, in order to make the present embodiment can receive better the radiofrequency signal that this electronic tag sends, this second mobile device 4 also comprises an orienting lug 48 and a screw 49, on this worktable 47, offer an elongated slot 471, the bottom of this orienting lug 48 is embedded in this elongated slot 471 movably, the top of this orienting lug 48 is fixed with this read write line 1, and one end of this screw 49 wears this elongated slot 471 and withstands this orienting lug 48.
When this orienting lug 48 moves along this vertical direction in this elongated slot 471, this read write line 1 also moves along this vertical direction thereupon, when this read write line 1 moves to a certain position of below of this electronic tag 2 along this vertical direction, the signal that this reading and writing device antenna can receive is maximum, thereby at this moment by this screw 49, wearing this elongated slot 471 again and withstanding this orienting lug 48 to move this read write line 1, this read write line 1 is fixed can receive position corresponding to peak signal, this will be conducive to follow-up at this read write line during along this screw mandrel 44 direction transverse shifting, after each mobile this distance, can receive better the radiofrequency signal that this electronic tag 2 sends.
In addition, this read write line 1 produces a feedback signal in the RSSI that calculates this electronic tag 2, and this feedback signal is transferred to this controller.Also have, the present embodiment selects screw as the fixing fixture of read write line, but it will be understood by those of skill in the art that the present invention is not limited to screw selected in the present embodiment, the substitutions of elements that can also select other for example screw as fixture.
For a concrete example, illustrate the present invention below, to enable those skilled in the art to understanding better technical scheme of the present invention:
Staff is mobile this orienting lug 48 manually, and this orienting lug 48 is moved along the vertical direction perpendicular to these screw mandrel 44 directions in this elongated slot 471, and mobile this read write line 1 that drives of this orienting lug 48 also moves along this vertical direction thereupon simultaneously.In the process moving staff, this read write line 1 connects a display or oscillograph, this read write line 1 transfers to this display or oscillograph by the signal detecting, staff observes this read write line 1 by the signal waveforms showing on the signal intensity that shows on this display or this oscillograph, and to be positioned at the signal at the diverse location place in this vertical direction strong and weak, in this way staff to find the position corresponding to crest place of the waveform showing on the strongest or this oscillograph of the signal intensity that shows on this display be exactly the optimum signal position of this read write line 1 in this vertical direction.
After searching out this optimum signal position, this controller with a certain fixed frequency transmitted signal to this stepper motor 42, this stepper motor 42 rotates a step angle after receiving first pulse signal, the rotation drive of this stepper motor 42 and the rotation of the screw mandrel 44 of this stepper motor mechanical connection, the rotation of this screw mandrel 44 drives this screw 45 to do transverse movement along these screw mandrel 44 directions, the traveling priority of this screw 45 drives also traveling priority of this track base 46 simultaneously, and then drives the read write line 1 being fixed on this worktable 47 also to do traveling priority.
Thus, this stepper motor 42 makes this read write line 1 along the certain distance of the transverse shifting of direction from left to right in Fig. 1 and moves to the A position with respect to this electronic tag 2 after receiving first pulse signal, this read write line 1 receives the radiofrequency signal that this electronic tag 2 sends the RSSI that calculates this electronic tag 2 according to this radiofrequency signal for-45dBm (referring to Fig. 4) simultaneously, and then this read write line 1 transfers to this controller by first RSSI value (45dBm) calculating.This controller just judges that whether the value of this first RSSI is zero, and it is non-vanishing to judge RSSI after receiving this first RSSI value immediately, and this controller continues transmitted signal to this stepper motor 42.
Thereafter, this stepper motor 42 receives second pulse signal, make this read write line 1 along the direction from left to right in Fig. 1 again transverse shifting certain distance move to the B position with respect to this electronic tag 2, this read write line 1 receives the radiofrequency signal that this electronic tag 2 sends the RSSI that calculates this electronic tag 2 according to this radiofrequency signal for-38dBm (referring to Fig. 4) simultaneously, and then this read write line 1 transfers to this controller by second the RSSI value (38dBm) calculating.This controller just judges that whether the value of this second RSSI is zero, and it is non-vanishing to judge RSSI after receiving this second RSSI value immediately, and this controller continues transmitted signal to this stepper motor 42.
This stepper motor 42 receives the 3rd pulse signal, make this read write line 1 along the direction from left to right in Fig. 1 again transverse shifting certain distance move to the C position with respect to this electronic tag 2, this read write line 1 receives the radiofrequency signal that this electronic tag 2 sends the RSSI that calculates this electronic tag 2 according to this radiofrequency signal for-44dBm (referring to Fig. 4) simultaneously, and then this read write line 1 transfers to this controller by the 3rd the RSSI value (44dBm) calculating.This controller just judges that whether the value of the 3rd RSSI is zero, and it is non-vanishing to judge RSSI after receiving the 3rd RSSI value immediately, and this controller continues transmitted signal to this stepper motor 42.
This stepper motor 42 receives the 4th pulse signal, make this read write line 1 along the direction from left to right in Fig. 1 again transverse shifting certain distance move to the D position with respect to this electronic tag 2, this read write line 1 receives the radiofrequency signal that this electronic tag 2 sends the RSSI that calculates this electronic tag 2 according to this radiofrequency signal for-51dBm (referring to Fig. 4) simultaneously, and then this read write line 1 transfers to this controller by the 4th the RSSI value (51dBm) calculating.This controller just judges that whether the value of the 4th RSSI is zero, and it is non-vanishing to judge RSSI after receiving the 4th RSSI value immediately, and this controller continues transmitted signal to this stepper motor 42.
This stepper motor 42 receives the 5th pulse signal, make this read write line 1 along the direction from left to right in Fig. 1 again transverse shifting certain distance move to the E position with respect to this electronic tag 2, this read write line 1 receives the radiofrequency signal that this electronic tag 2 sends the RSSI that calculates this electronic tag 2 according to this radiofrequency signal for-48dBm (referring to Fig. 4) simultaneously, and then this read write line 1 transfers to this controller by the 5th the RSSI value (48dBm) calculating.This controller just judges that whether the value of the 5th RSSI is zero, and it is non-vanishing to judge RSSI after receiving the 5th RSSI value immediately, and this controller continues transmitted signal to this stepper motor 42.
This stepper motor 42 receives the 6th pulse signal, make this read write line 1 along the direction from left to right in Fig. 1 again transverse shifting certain distance move to the F position with respect to this electronic tag 2, this read write line 1 receives radiofrequency signal that this electronic tag 2 sends and is 0dBm (referring to Fig. 4) according to the RSSI that this radiofrequency signal calculates this electronic tag 2 simultaneously, and then this read write line 1 transfers to this controller by the 6th the RSSI value (0dBm) calculating.This controller just judges whether its value is zero after receiving the 6th RSSI value immediately, and to judge RSSI be zero, show that this read write line 1 moves to the right-hand member of this electronic tag 2 and surpasses the right-hand member of this electronic tag 2 from the left end of this electronic tag 2, at this moment this controller stops transmitted signal.
This controller filters out the RSSI of numerical value maximum from the RSSI sequentially sorting according to reception, i.e. second RSSI value (38dBm) maximum, this read write line corresponding to the RSSI of this numerical value maximum is that B position is the optimal antenna position of this read write line with respect to this electronic tag with respect to the position of this electronic tag.
Then, this controller calculates the difference 6-2=4 that this controller is received the sequence figure place (the 2nd) that the RSSI of the number of RSSI (6) and numerical value maximum is corresponding, thereafter the pulse signal of 4 times that this controller successively sends a reverse signal and this fixed frequency is to this stepper motor 42, these stepper motor 42 counter-rotation, and then drive this read write line 1 traveling priority in the other direction, send the pulse signal of this number of times at this controller after, stop transmitted signal, this stepper motor 42 also stops operating, and now this read write line 1 moves to i.e. this optimal antenna position place, B position.
In sum, the present invention can adjust read write line to respect to the optimal antenna position place of electronic tag fast, easily and accurately by this Antennaautoadjust device, not only reaches accurately, saves time and laborsaving, has also reduced operating personnel's operation easier.
Although more than described the specific embodiment of the present invention, it will be understood by those of skill in the art that these only illustrate, protection scope of the present invention is limited by appended claims.Those skilled in the art is not deviating under the prerequisite of principle of the present invention and essence, can make various changes or modifications to these embodiments, but these changes and modification all fall into protection scope of the present invention.
Claims (10)
1. an Antennaautoadjust device, it comprises the first mobile device that makes a read write line that comprises antenna and to be sticked the travelling belt of electronic tag moves horizontally, this read write line is positioned at the below of this electronic tag, it is characterized in that, it also comprises the second mobile device and the controller that this read write line is moved with respect to this electronic tag;
This second mobile device comprises that a stepper motor, a shaft coupling, a screw, are arranged with this screw and make the screw mandrel of this screw traveling priority and a fixed cover be located at the supporting seat on this screw, this read write line is fixed on this supporting seat, and this stepper motor is connected with this screw mandrel by this shaft coupling;
This controller for a fixed frequency transmitted signal to this stepper motor, this stepper motor often receives pulse signal and rotates a step angle, so that this read write line transverse shifting one distance;
This read write line for every movement this apart from time, receive the radiofrequency signal that this electronic tag sends the RSSI that calculates this electronic tag according to this radiofrequency signal;
The RSSI that this controller also comes for receiving successively this read write line transmission, and judge whether RSSI is zero, and when RSSI is zero, this controller stops transmitted signal, and from the RSSI sequentially sorting according to reception, filters out the RSSI of numerical value maximum;
This controller is also for calculating the number of times of transmitted signal again, successively send the pulse signal of this number of times of a reverse signal and this fixed frequency to this stepper motor thereafter, this stepper motor rotates to drive this read write line transverse shifting, wherein, this number of times is received the poor of the number of RSSI and sequence figure place corresponding to the RSSI of numerical value maximum for this controller.
2. Antennaautoadjust device as claimed in claim 1, it is characterized in that, this second mobile device also comprises a support that contains base, the first back up pad and the second back up pad, this first back up pad and this second back up pad are installed on this base, the rotating shaft of this stepper motor wears this back up pad and is connected with one end of this screw mandrel by shaft coupling, and the other end of this screw mandrel wears this second back up pad.
3. Antennaautoadjust device as claimed in claim 2, is characterized in that, the rotating shaft of this stepper motor is connected with the main drive shaft of this shaft coupling, and the driven shaft of this shaft coupling is connected with one end of this screw mandrel.
4. Antennaautoadjust device as claimed in claim 2, is characterized in that, this support also comprises parallel the 3rd back up pad between this first back up pad and this second back up pad, and this screw mandrel wears the 3rd back up pad.
5. Antennaautoadjust device as claimed in claim 1, is characterized in that, this supporting seat comprises that a track base and is fixed on the worktable on track base, and this read write line is fixed on this worktable, and this track base fixed cover is located on this screw.
6. Antennaautoadjust device as claimed in claim 5, it is characterized in that, this second mobile device also comprises an orienting lug, offers an elongated slot on this worktable, the bottom of this orienting lug is embedded in this elongated slot movably, and the top of this orienting lug is fixed with this read write line.
7. Antennaautoadjust device as claimed in claim 6, is characterized in that, this second mobile device also comprises a fixture, and one end of this fixture wears this elongated slot and withstands this orienting lug.
8. Antennaautoadjust device as claimed in claim 7, is characterized in that, this fixture is a screw.
9. Antennaautoadjust device as claimed in claim 1, is characterized in that, this read write line is used for producing a feedback signal in the RSSI that calculates this electronic tag, and this feedback signal is transferred to this controller.
10. Antennaautoadjust device as claimed in claim 1, it is characterized in that, this first mobile device comprises that one establishes the unwinding device of this travelling belt thereon for pulling out volume, one for by the first reverse wheel of this travelling belt conversion direction thereon that is sticked, one draw-gear for this travelling belt along continuous straight runs is moved, one for by the second reverse wheel of this travelling belt conversion direction thereon that is sticked and for rolling the wrap-up of establishing this travelling belt thereon, wherein this draw-gear comprises two traction wheels, these two traction wheels are sticked respectively at the upper surface of this travelling belt and lower surface for this travelling belt of sandwiched.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410387630.9A CN104156742B (en) | 2014-08-07 | 2014-08-07 | Antennaautoadjust device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410387630.9A CN104156742B (en) | 2014-08-07 | 2014-08-07 | Antennaautoadjust device |
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| Publication Number | Publication Date |
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| CN104156742A true CN104156742A (en) | 2014-11-19 |
| CN104156742B CN104156742B (en) | 2017-07-14 |
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| CN201410387630.9A Expired - Fee Related CN104156742B (en) | 2014-08-07 | 2014-08-07 | Antennaautoadjust device |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113283258A (en) * | 2021-06-02 | 2021-08-20 | 上海宜链物联网有限公司 | Method and reading device capable of automatically searching optimal working frequency point of electronic tag |
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| JP2008161994A (en) * | 2006-12-29 | 2008-07-17 | Mitsubishi Electric Corp | Automatic connector insertion/removal device and connector insertion/removal method |
| CN101320061A (en) * | 2008-07-21 | 2008-12-10 | 西安电子科技大学 | Automatic measuring system of antenna phase center |
| CN101344932A (en) * | 2007-06-20 | 2009-01-14 | 香港科技大学 | Method and system for determining the placement of RFID antennas to obtain a readable region for RFID tags |
| CN201229382Y (en) * | 2008-07-21 | 2009-04-29 | 西安电子科技大学 | Multifunctional antennae test rotating platform |
| CN102402675A (en) * | 2010-09-13 | 2012-04-04 | 株式会社理光 | Motion tracking techniques for RFID tags |
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Patent Citations (5)
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| JP2008161994A (en) * | 2006-12-29 | 2008-07-17 | Mitsubishi Electric Corp | Automatic connector insertion/removal device and connector insertion/removal method |
| CN101344932A (en) * | 2007-06-20 | 2009-01-14 | 香港科技大学 | Method and system for determining the placement of RFID antennas to obtain a readable region for RFID tags |
| CN101320061A (en) * | 2008-07-21 | 2008-12-10 | 西安电子科技大学 | Automatic measuring system of antenna phase center |
| CN201229382Y (en) * | 2008-07-21 | 2009-04-29 | 西安电子科技大学 | Multifunctional antennae test rotating platform |
| CN102402675A (en) * | 2010-09-13 | 2012-04-04 | 株式会社理光 | Motion tracking techniques for RFID tags |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113283258A (en) * | 2021-06-02 | 2021-08-20 | 上海宜链物联网有限公司 | Method and reading device capable of automatically searching optimal working frequency point of electronic tag |
| CN113283258B (en) * | 2021-06-02 | 2024-04-23 | 上海宜链物联网有限公司 | Method capable of automatically searching optimal working frequency point of electronic tag and reading device |
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| CN104156742B (en) | 2017-07-14 |
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