CN202306569U - Mechanical system for simulation and automatic control system thereof - Google Patents
Mechanical system for simulation and automatic control system thereof Download PDFInfo
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- CN202306569U CN202306569U CN2011203674972U CN201120367497U CN202306569U CN 202306569 U CN202306569 U CN 202306569U CN 2011203674972 U CN2011203674972 U CN 2011203674972U CN 201120367497 U CN201120367497 U CN 201120367497U CN 202306569 U CN202306569 U CN 202306569U
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Abstract
The utility model provides a mechanical system for simulation and an automatic control system thereof. The mechanical system comprises an antenna support with a vertical rotating shaft, a tag support with a vertical rotating shaft and a translation shaft, tracks and a track support, wherein the antenna support is driven by a motor to rotate around the vertical rotating shaft; the antenna support is also in support of manually adjusting the angle between the antenna and the horizontal plane; the tag support is driven by the motor; and the track is used for supporting the tag support moving around the track; the track support provides supporting for the track so as to keep the track at the horizontal position and to make the track be suitable for connecting with at least one track so that the tracks can be in cascade connection. The utility model also provides an automatic control system for supporting and controlling the mechanical system.
Description
Technical field
The utility model relates to a kind of mechanical system and automation control system thereof that is used for emulation in the system of the individual antenna of two dimensional surface and single label.
Background technology
RF identification (RFID) is a kind ofly to send and the automatic identifying method of received RF signal to be used to discern by miniaturized electronics.
RFID equipment mainly is divided into reader and label.The RFID reader is a kind ofly to come to write the equipment that has antenna of data from RFID label reading of data and to it through the demodulation radiowave.The RFID label comprises small chip and antenna; Chip pickup is from the radiofrequency signal of reader to its emission, and has the signal emission of data to be back to any position at a distance of several inches and even 20 or 30 feet far away modulation.Said chip can also carry the data that reach several kilobyte.Label with unique identification number can be attached or be included in product, and in animal or human's body, thereby and canned data can be read device equipment through the long-range object that adheres to of identification that obtains of the signal of modulation.
Radio frequency (" the RF ") signal that returns from the RFID label can be read the device reception, and the intensity of this signal can use reception signal intensity indication (" RSSI ") to measure.RSSI is a kind of general radio frequency receiver technology tolerance.The RSSI value is transparent for the user of receiver usually, but it can be used to indicate the readability of RFID label.
The RFID label is divided into two kinds, and is promptly active with passive.Active label uses the electric power of the battery of himself to produce the RF signal actively.Passive label can only come the transmitting RF signal based on the RF signal that receives near reader.Therefore, active label generally has bigger effective range or signal intensity than passive label.But passive label is littler and more cheap than active label.
The RFID technology was used 10 years even more of a specified duration by several thousand companies, and the benefit that RFID uses is to increase productivity and reduce operation cost.Up to date, this technology all is widely used in following four main fields:
1) supply chain management,
2) identification,
3) transportation,
4) false proof.
The performance of given RFID equipment not only depends on product specification, also depends on setting, how much, interference, multipath fading and other environmental factors of reader.People can explore these factors through the method for repetition test.But the too loaded down with trivial details and result of this heuristic process might be at random.
A kind of more systematic method is at first to find out the ideal performance that is produced by how much, and afterwards, the skew at any scene is all caused by environmental factor.Fine setting further just can concentrate on the environmental factors such as multipath reflection, interference and noise more.So following plant equipment can make that this idea is feasible, promptly this plant equipment can most of how much situation of emulation and can be used in the anechoic chamber.
The utility model content
The utility model relate in one aspect to a kind of mechanical system that is used for emulation in the system of the individual antenna of two dimensional surface and single label; This mechanical system comprises: the antenna holder with a vertical turning axle; This antenna holder is rotated around vertical axes by motor-driven, and wherein said antenna holder is also supported the angle of manual adjustments antenna and surface level; Have the label support of a vertical turning axle and a translation shaft, this label support is by motor-driven; The supporting label support is along its track that moves; Track support, its for said track provide supporting with remain on horizontal level and be suitable for wanting connected one getting on the right track, thereby track can cascade.
The utility model also relates to a kind of automation control system of supporting and controlling the described mechanical system in above-mentioned aspect; This automation control system comprises: the equivalent displacement computing module, according to label in two-dimensional space with respect to the position calculation label of antenna equivalent displacement from antenna; The angle calculation module is calculated aerial angle and label angle; Antenna motor control module, control antenna motor come rotating antenna to arrive the aerial angle of setting; The tag displacements motor control module, control tag displacements motor moves to label support the position of setting; Label electric rotating machine control module, control label electric rotating machine rotates to label support the angle of setting; RFID reader control module, the power level and the operating frequency of control RFID reader; Receiver module is from RFID reader acceptance test result; Memory module stores test result in file or the database into.
Description of drawings
Fig. 1 is the 3-D view of said mechanical system.
Fig. 2 draws, and shows the top view and the side view of said mechanical system.
Fig. 3 shows the 3-D view of the amplification of antenna holder (holder).
Fig. 4 is the top view that the amplification of geometric relationship is shown.
Fig. 5 is the top view of the layout of the read access measurement in two dimensional surface.
Fig. 6 draws, and shows the measurement result of test shown in Figure 5.
Fig. 7 is a kind of 3-D view of application scenarios, and antenna is installed on the wall, and label is bonded on the box and along conveyer belt and moves.
Fig. 8 illustrates the calculating of the geometry of simulation scenarios shown in Figure 7.
Fig. 9 illustrates the experimental result of test shown in Figure 8.
Figure 10 illustrates the conversion of Cartesian coordinates and polar coordinate system.
Figure 11 illustrates the reference mechanical system of the rotation and the translation of label support.
Figure 12 illustrates the reference mechanical system of the rotation of antenna holder.
Figure 13 illustrates the process flow diagram of test operation.
Figure 14 illustrates the process flow diagram of the geometry that is used for the test parameter conversion.
Figure 15 illustrates the block diagram of automated software system.
Figure 16 is the block diagram of automation control system.
Embodiment
The utility model relates to the mechanical system that obtains the access performance of single label in different relative orientations and displacement from reader.The term access performance refers to the performance of reading and writing, locking and the elimination (killing) of RFID label.
In most RFID disposes, there is following parameter to need to regulate, that is, and the distance between antenna orientation, label orientation, label and antenna and the transmitted power and the sensitivity of reader.In addition can not be by the environmental factor of controlling fully, for example humidity, temperature, multipath fading, interference.If want under the situation that the fluctuation that environmental factor is caused is known nothing, to finely tune controlled variable, this process can be very consuming time and also performance possibly not reach the best forever.
Here we propose to come micro-tensioning system with two steps.Step 1: in anechoic chamber,, test.All interference all conductively-closed are fallen, and multipath fading is minimized.Controlled humidity and temperature.Utilize the disclosed mechanical system of the utility model can the many geometric relationships of emulation.Thereby measurement performance in the ideal case.Then, in step 2, the in-site measurement performance.Because have the priori of the tag access performance at each some place, any deflection is all caused by environmental factor.The slip-stick artist can be absorbed in the factor of controling environment the difference of reality and ideal state is reduced to minimum.
The purpose of this mechanical system is an emulation different geometric structure in two dimensional surface.Any two points in a plane form straight line, and the distance of point-to-point transmission is clear and definite.With reference to Figure 10, in the Cartesian plane more arbitrarily (x, y) can be mapped to uniquely polar coordinates (r, θ).Wherein r can be obtained by
, and θ is obtained by
.For the radiowave of in free space, advancing, physical characteristics depends on relative distance, but irrelevant with reference frame.Phasing degree θ does not influence the RF characteristic and can ignore.Therefore, the equipment that has a translation of a direction just is enough to any two dot systems of emulation in two dimensional surface.In RF communication, the antenna radiation pattern of reader antenna and label are in general also non-isotropic.Antenna orientation and label orientation influence the tag access performance.If the support that allows antenna and label 360 degree rotations is arranged, complete geometric relationship that so just can emulation RFID application.Fig. 4 illustrates process of simulation.First system among Fig. 4 and the angled δ of X axle.Translation is through realizing the total system anglec of rotation-δ.As long as angle α and β are constant, on radio characteristic, do not have any physical differences.
This mechanical system is that antenna provides a turning axle, for label provides a turning axle and a translation shaft.With reference to figure 4, the value of α and β and displacement all are motor-driven.These motors are connected with the computer control panel.So the emulation of geometric relationship is programmable.
Fig. 1 illustrates the 3-D view of this mechanical system, and antenna holder 101 can rotate freely along the longitudinal axis at the center through cramp bar 103.Plant equipment is that 101 rotation provides machine torque and by 102 protections of mechanical cover.Label support 104 is cystosepiments, is used to hold the tested person label on the plane that is in vertical position.Label support cramp bar 105 can rotate freely along the longitudinal axis through its center.Dolly 106 can move along track 107.Being used for the machine torque that label support rotates and dolly 106 moves is produced by the plant equipment of laying at 106 places.The technology figure of this plant equipment is shown in figure 11.Motor 1 is used for translation, and motor 2 is used for rotation.For antenna holder, Figure 12 shows corresponding mechanical system.
Fig. 2 illustrates the side view and the top view of layout.The center of antenna and the centrally aligned of label, and they all are in sustained height on the ground.
Fig. 3 illustrates the 3-D view of antenna holder.This is a reference design.Antenna (301) is installed on the backboard (302).This backboard is installed on the U-shaped platform (303).Groove on the platform (303) allows to carry out the minor adjustment to the angle between antenna and the ground.This is very important for antenna alignment.
Whole test is under the control of automated software, to carry out.Software block diagram is shown in figure 15.The whole control is under the leading engine (main engine).Graphic user interface is accepted user's order.The geometric simulation manager converts two-dimensional position to the one dimension displacement of label support.Simultaneously, calculate aerial angle and label support angle.The flow process of simulation calculation is shown in figure 14.The test vector manager is accepted the user about the input of power level and operating frequency and the output of reception geometric simulation manager.It stores test vector in the database into through the database interface driver.Then, vector is sent to the test control manager.Test control manager order Electric Machine Control manager is regulated the setting of mechanical hardware.Simultaneously, it disposes the RFID reader through the command RFID control manager.The flow process of test control manager is shown in figure 13.
Here provide two instances and explain how to use this system in real world applications, to come emulation different geometric structure.
Example 1:
For example, a new antenna is arranged, we hope to know the read access performance under different angles and displacement.That label is positioned at is different (x, y) coordinate, wherein the normal center of directional antenna always.Referring to Fig. 5, we can become the displacement between label and antenna with the x-displacement with the y-displacement conversion according to Pythagorean theorem.Rotating antenna produces required angle displacement then.Therefore, thus these geological informations all import in the geometric simulation manager with generating test vector.In case user's input power level and operating frequency, test vector is just ready.The user can begin test operation through graphic user interface afterwards.The test control manager will be handled all cycle testss.Process flow diagram is shown in figure 13.
Carry out test, and measurement result is as shown in Figure 6.Colour code is represented successful read rate.In the position (0,1800), successful read rate is near 100%.In the position (900,1558), successful read rate is also near 100%.But in the position (+900,1588), successful read rate approaches 0.Can see that antenna radiation pattern is biased to the left side.We have known how directed this new antenna is to realize bigger coverage now.
Example 2:
In Fig. 7, antenna (702) is installed on the wall (701).Travelling belt is with respect to wall (701) vertical moving.Antenna direction must become miter angle with wall.Box (704) is by Tape movement.RFID label (703) is installed on the box.We want to know whole width that antenna power whether can cover tape and can detect box where now.This geometry appears in Fig. 8.Find out the answer of first problem, just need checking when y equals bandwidth, whether can access acceptable successful read rate (as 90%).Find out the answer of second problem, just need obtain the maximal value of the x with acceptable successful read rate.Emulation testing is will measure in whole (x, y) all the read access performances in the coordinate range.At this moment, δ=45
0β and displacement are calculated according to each x and y value.Can find this equation among Fig. 8.All these geological informations and computing formula all are input in the geometric simulation manager.
Carry out test.The measurement of success read rate is as shown in Figure 9.Work as y=600mm, the read range of x is 1600 mm.Work as y=1300mm, the read range of x is 1000 mm.As desired, the value of y is big more, and the read range on the x direction is just more little.We also can see blind area (stain).These blind areas are that the antenna radiation pattern owing to label produces.
Above information has been arranged, the slip-stick artist can select bandwidth (y read range reliably) practicality value and know the securing position (x read range reliably) of detection.
Figure 16 is the block diagram of automation control system.This automation control system comprises the equivalent displacement computing module, is used for according to label at two-dimensional space with respect to the position calculation label of the antenna equivalent displacement from antenna; The angle calculation module is used to calculate aerial angle and label angle; The antenna motor control module is used for the control antenna motor and comes rotating antenna to arrive the aerial angle of setting; The tag displacements motor control module is used to control the position that the tag displacements motor moves to label support setting; Label electric rotating machine control module is used to control the angle that the label electric rotating machine rotates to label support setting; RFID reader control module is used to control the power level and the operating frequency of RFID reader; Receiver module is used for from RFID reader acceptance test result; And memory module, be used for storing test result into file or database.
Conclusion:
We have proposed to be used to finely tune the two-stage process that RFID disposes.The first step is to understand the effect of the geometry of antenna and label, and second step was to regulate environmental factor to obtain optimum performance.
The first step is carried out in anechoic chamber,, has eliminated all environmental factors such as for example multipath fading, interference etc.The mechanical system of using us to propose can be tested the individual antenna that relates on a two dimensional surface and all how much an of label.
Although utility model combines its specific embodiment to be described, obvious many changes, modification and modification are to it will be readily apparent to those skilled in the art that.Therefore, be intended to contain change, modification and the modification in all such spirit that fall into accompanying claims and the broad range.In addition, in this application the quoting or identify should not be interpreted as and admit that such reference can be used as the prior art of the utility model of any reference.
Claims (4)
1. mechanical system that is used for emulation in the system of the individual antenna of two dimensional surface and single label, this mechanical system comprises:
Antenna holder with a vertical turning axle, this antenna holder is rotated around vertical axes by motor-driven, and wherein said antenna holder is also supported the angle of manual adjustments antenna and surface level;
Have the label support of a vertical turning axle and a translation shaft, this label support is by motor-driven;
The supporting label support is along its track that moves;
Track support, its for said track provide supporting with remain on horizontal level and be suitable for wanting connected one getting on the right track, thereby track can cascade.
2. mechanical system as claimed in claim 1 also comprises the backboard that this antenna is mounted thereto, and this backboard is installed in again on the U-shaped platform.
3. mechanical system as claimed in claim 2, wherein this U-shaped platform has minor adjustment is carried out in permission to the angle between antenna and the ground groove.
4. support and the automation control system of the described mechanical system of control claim 1 that this automation control system comprises for one kind:
The equivalent displacement computing module, according to label in two-dimensional space with respect to the position calculation label of antenna equivalent displacement from antenna;
The angle calculation module is calculated aerial angle and label angle;
Antenna motor control module, control antenna motor come rotating antenna to arrive the aerial angle of setting;
The tag displacements motor control module, control tag displacements motor moves to label support the position of setting;
Label electric rotating machine control module, control label electric rotating machine rotates to label support the angle of setting;
RFID reader control module, the power level and the operating frequency of control RFID reader;
Receiver module is from RFID reader acceptance test result;
Memory module stores test result in file or the database into.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US34476710P | 2010-10-01 | 2010-10-01 | |
| US61/344767 | 2010-10-01 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202306569U true CN202306569U (en) | 2012-07-04 |
Family
ID=46375422
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011203674972U Expired - Lifetime CN202306569U (en) | 2010-10-01 | 2011-09-30 | Mechanical system for simulation and automatic control system thereof |
Country Status (2)
| Country | Link |
|---|---|
| CN (1) | CN202306569U (en) |
| HK (1) | HK1150726A2 (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103438925A (en) * | 2013-09-06 | 2013-12-11 | 北京邮电大学 | Wireless radio frequency identification device detection device |
| CN104422826A (en) * | 2013-08-19 | 2015-03-18 | 鸿富锦精密电子(天津)有限公司 | Anechoic chamber and electric wave test device thereof |
| CN109613478A (en) * | 2018-12-13 | 2019-04-12 | 成都精位科技有限公司 | UWB positions label omni-directional test method and device |
-
2011
- 2011-09-30 HK HK11110384A patent/HK1150726A2/en not_active IP Right Cessation
- 2011-09-30 CN CN2011203674972U patent/CN202306569U/en not_active Expired - Lifetime
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104422826A (en) * | 2013-08-19 | 2015-03-18 | 鸿富锦精密电子(天津)有限公司 | Anechoic chamber and electric wave test device thereof |
| CN103438925A (en) * | 2013-09-06 | 2013-12-11 | 北京邮电大学 | Wireless radio frequency identification device detection device |
| CN109613478A (en) * | 2018-12-13 | 2019-04-12 | 成都精位科技有限公司 | UWB positions label omni-directional test method and device |
Also Published As
| Publication number | Publication date |
|---|---|
| HK1150726A2 (en) | 2011-12-30 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20120704 |