JP2008003896A - Communication characteristic measuring system - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a communication characteristic measuring system wherein a motor as a power source does not affect a measured result. <P>SOLUTION: The communication characteristic measuring system has an orthogonal coordinate type desk robot or a 6-freedom-degree articulated robot as a variable positioning means for holding a measurement object including a non-contact communication IC and varying the position of the measurement object to a reader-writer antenna 120 according to control signals, and measures communication characteristics of the measurement object including the non-contact communication IC and between the non-contact communication IC and the reader-writer antenna. The robot uses an ultrasonic motor as the power source. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a communication characteristic measurement system that measures a communication characteristic between a measurement object including a non-contact communication IC and the non-contact communication IC and a reader / writer antenna.

  As a non-contact communication IC card equivalent to ISO 14443 and a mobile phone terminal incorporating this function, those equipped with a non-contact communication IC called a Felica chip are known. ("Felica" is a registered trademark of Sony Corporation.) The communication antenna of this contactless communication IC is an antenna, such as stranded wire, single wire, wire, flexible, enamel, 3 roll product, 4 roll product, etc. The communication characteristics vary greatly depending on factors such as the shape and material of the device and the shape of the housing. In order to accumulate know-how as a manufacturer during terminal development, a lot of precise sample data and analysis are required for the communication characteristics of the communication antenna of the non-contact communication IC.

  In general, in a contactless communication IC card technology equivalent to ISO 14443, a communication hole (non-communication area) may occur even in a communicable radius. The magnetic coupling state changes depending on which position of the operating magnetic field generated by the reader / writer and at what angle the IC card is placed. The voltage induced in the IC card varies depending on the magnetic coupling state, and the load impedance changes due to voltage control for stably operating the circuit. Although the load impedance and the resistance / capacitor to be switched for load modulation are connected in parallel, the change in the combined value is small. When the coefficient K indicating the degree of magnetic flux passing through the antenna conductor of the reader / writer (reader) from the conductor loop of the non-contact communication IC card antenna increases, the reader / writer and the IC card influence each other and the resonance state changes. The waveform changes due to phase rotation.

  In the case of a card-shaped non-contact communication IC, a magnetic field is converted into voltage between the IC card and the reader / writer based on the principle of electromagnetic induction. The induced voltage is proportional to the magnetic field strength (H), the inner area (S) of the receiving coil, the number of turns of the coil, and the frequency (f) of the carrier wave. Between the IC card and a specific reader / writer, the inner area and the number of turns of the receiving coil are constant, and the frequency of the carrier wave is determined by radio wave regulations and standards. However, only the magnetic field strength changes depending on the relative positional relationship between the reader / writer and the IC coil antenna coil.

  With non-contact communication antennas built into electronic devices such as mobile phones such as Mobile Suica (registered trademark) implemented by JR East Railway Company, the inner area of the coil and the number of turns of the coil are indefinite. Prediction simulation of the occurrence location of the problem becomes even more difficult.

  Therefore, the spread of automatic measurement systems for the purpose of improving the development efficiency and quality of electronic devices using non-contact IC card technology is considered urgent.

  More specifically, in order to confirm the communication characteristics of the communication antenna of the non-contact communication IC built in the portable electronic device, in the development process, measurement of the maximum communication distance, measurement of the three-dimensional communication impossible region (three-dimensional NULL point measurement) It is necessary to carry out authenticity determination measurement using a pseudo ticket gate. The man-hours for the measurement work are enormous. Conventionally, this measurement is performed manually or automatically.

  In conventional measurement systems that use jigs by manual operation, in the case of a measurement system, the tower jig that holds the measurement object is manually operated during the maximum communication distance measurement work and the measurement work in the 3D communication impossible area. Then, the distance between the portable electronic device (built-in non-contact communication IC) or the contact communication IC card to be measured and the reader / writer / antenna is controlled according to empirical rules in the range of about 0 mm to 20 mm, and the control PC monitor screen Sample the measured values by visual inspection.

  This method wastes time and labor for data sampling. In the case of measurement in millimeter units, the number of measurement points is very large (200 points from 0 mm to 200 mm on one axis when measuring the maximum communication distance, and 8 million points of 200 × 200 × 200 when measuring three-dimensional NULL points). When there are many measurement points, manual sampling and visual data sampling may psychologically press the person in charge, and the data accuracy will be low, the reproducibility of the measured value will be low, or the measurement procedure will vary. Inconveniences such as becoming dependent on the user may occur.

  An automatic measurement system is also known as an improvement on a manual measurement system. In a conventional automatic measurement system, a vertical direction motor and a horizontal direction motor for automatically controlling a vertical movement (that is, vertical movement) and a horizontal direction as a pair of linear motion actuators as a pair of linear motion actuators. The operation is controlled by the control PC. Thus, the vertical and horizontal positions of the measurement target with respect to the reader / writer antenna are automatically controlled.

  Furthermore, an automatic system using a 6-DOF articulated industrial robot is also known. This robot hand is a combination of six joints capable of rotating in one axis and a grip portion for gripping the measurement target at the tip.

  By using such a rectangular coordinate type desktop robot and the 6-DOF multi-joint industrial robot shown in FIG. 4, maximum communication distance measurement, three-dimensional communication impossible area measurement, resonance frequency measurement, JR East mobile watermelon ticket gate performance In each measurement work of the test (touch & go test), improvement of reproducibility of measurement results and refinement of collected data can be expected.

Patent Documents 1 and 2 disclose a spherical ultrasonic motor having three degrees of freedom for constituting a spherical actuator.
JP 2000-270569 A JP 2003-70272 A

  However, in the conventional automatic measurement system, an electromagnetic servo motor that uses a coil as an internal stator is used as a power source for the existing products of Cartesian coordinate tabletop robots and 6-DOF multi-joint industrial robots. Adopted. For this reason, the electromagnetic field generated by the motor affects the communication characteristic measurement result of the communication antenna of the non-contact communication IC.

  After moving the measuring object to the measuring position, the servo motor is turned off once, and the portable electronic device and card to be measured by the mechanical brake built in the Cartesian coordinate tabletop robot or 6-DOF multi-joint industrial robot It is conceivable to fix the spatial position at the measurement point.

  However, in this method, for example, in the measurement work where the spatial position is not fixed, such as “JR East Mobile Watermelon Ticket Gate Performance Test (Touch & Go Test)”, the motor cannot be stopped, and the electromagnetic field generated by the motor is measured. Will be affected. In particular, a relatively large electromagnetic servomotor of 80 W or more is often used for the first and second joints of a 6-DOF multi-joint industrial robot. Therefore, even if an automatic measurement system is constructed using a Cartesian coordinated tabletop robot or a 6-DOF articulated industrial robot, the electromagnetic field generated by the motor used by the robot may affect the measurement results. I cannot deny.

  In such a background, the present invention intends to provide a communication characteristic measurement system in which a motor as a power source does not affect measurement results.

  A communication characteristic measurement system according to the present invention includes a variable positioning means for holding a measurement object including a non-contact communication IC and changing a position of the measurement object with respect to the reader / writer antenna according to a control signal, and a non-contact communication IC And measuring means for measuring communication characteristics between the non-contact communication IC and the reader / writer antenna, and the variable positioning means uses an ultrasonic motor as a power source.

  By using the ultrasonic motor as the power source, the electromagnetic wave generated by the power source is eliminated, thereby preventing the power source from providing communication between the non-contact communication IC and the reader / writer antenna.

  In particular, it is preferable to use a non-magnetic material for all of the components of the ultrasonic motor.

  According to the present invention, it is possible to prevent the power source from affecting the measurement result by using the ultrasonic motor as the power source in the communication characteristic measuring system including the variable positioning means that is automatically controlled. As a result, it is possible to perform highly accurate measurement while automating the measurement.

  Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the drawings.

  FIG. 1 shows a schematic configuration of a measurement system according to the first embodiment of the present invention.

  A support column 155 standing upright on the pedestal 150 is fixed, and an arm 157 protruding in the horizontal direction with respect to the support column 155 is supported so as to be slidable in the vertical direction. A grip 163 is attached to the lower side of the arm 157 via a spherical ultrasonic motor 230. As a result, the posture of the measurement object gripped by the gripper 163 can be controlled. In this case, the rotation angle around the axis around which the gripping part 163 is suspended and the elevation angle of the gripping part 163 can be changed. The gripper 163 is configured to be able to grip the measurement object 110. The measurement object 110 is a non-contact communication IC built-in device or a card. In the case of a card, the card may be held via an adapter that stores the card.

  Further, the vertical motor 210 for automatically controlling the vertical movement (that is, the vertical movement) of the arm 157 and the horizontal movement of the measuring object 110 attached to the arm 157 so as to be slidable in the horizontal direction. A lateral motor 220 for automatically controlling the above is provided. These motors 210 and 220 constitute a linear actuator, and the operation is controlled by the control PC 140. The operation of the spherical ultrasonic motor 230 is also controlled by the control PC 140. As a result, the vertical and horizontal positions and orientations of the measurement object 110 with respect to the reader / writer antenna 120 are automatically controlled. In this example, the reader / writer antenna 120 includes a reader / writer control board and an antenna board.

  A non-contact communication IC card reader / writer / antenna 120 that communicates with the measurement target 110 is disposed on a pedestal 150 below the measurement target 110 attached to the arm 157. The reader / writer antenna 120 is connected to a control PC (data collection PC) 140 via a cable. In the vicinity of the pedestal 150, an antenna 130 for measuring the resonance frequency of the communication antenna of the non-contact communication IC of the measurement object 110 is disposed, and this antenna 130 is connected to the measuring instrument 132 via a cable.

  FIG. 2 shows a first modification of the measurement system of FIG. Parts that are the same as those shown in FIG. 1 are given the same reference numerals, and redundant descriptions are omitted. In the configuration of FIG. 1, the gripping part 163 is supported by the spherical ultrasonic motor 230 so that the posture of the gripping part 163 can be controlled. However, in FIG. 2, the spherical ultrasonic motor 230 is provided on the pedestal 150 side. The antenna 120 is supported so that the attitude can be controlled. That is, the rotation angle around the axis supporting the reader / writer antenna 120 and the elevation angle of the reader / writer antenna 120 can be changed.

  FIG. 3 shows still another modification of the measurement system of FIG. This example is a compromise of the configuration of FIG. 1 and FIG. 2, and uses two spherical ultrasonic motors 230 so that the postures of both the gripping portion 163 and the reader / writer antenna 120 can be controlled.

  FIG. 4 shows a schematic configuration of a measurement system according to the second embodiment of the present invention. In this method, a 6-DOF manipulator using a spherical ultrasonic motor 230 is used. Usually, an articulated robot arm requires 6 degrees of freedom in order to fix the position of the workpiece in any posture within the three-dimensional space within the movement range. In this example, three spherical ultrasonic motors 230 are used, and the links are connected by the spherical ultrasonic motors 230. One end of the serially connected link is fixed to the floor, and a gripping portion 163 is attached to the other end.

  In constructing a robot arm with six degrees of freedom, as shown in FIG. 5A, if an electromagnetic servomotor is used, six motors are required. As shown in FIG. 5B, when a spherical ultrasonic motor is used to construct a robot arm having an equivalent function, only three motors are required.

  The following points can be mentioned as the effects of the 6-DOF manipulator using the spherical ultrasonic motor. That is, in the design of the manipulator link, the amount of calculation of the longitudinal elastic modulus E, the transverse elastic modulus G, the cross-sectional secondary moment, and the cross-sectional secondary pole moment is halved, and the design man-hours of the material constituting the link are reduced. The Further, a smaller 6-degree-of-freedom manipulator can be realized.

  FIG. 6 shows a plan view (a) and a front view (b) of a configuration example of the grip portion 163. The plan view is a cross-sectional view taken along the line A-A 'of the front view. Torque output from a traveling-wave, non-magnetic, rotary ultrasonic motor is used to open and close the fingers of the gripping part.

  A pinion 43 is coupled to the shaft 47 of the rotary ultrasonic motor 200. The pinion 43 is engaged with a pair of racks 41 configured to be slidable in parallel with each other, and the rotation of the pinion 43 is converted into a parallel sliding operation of the pair of racks 41. A pair of claws 45 for gripping the measurement object is attached to the rack 41, and the distance between the pair of claws 45 narrows or widens as the rack 41 slides in parallel. With this configuration, the measurement object 110 can be held by the pair of claws 45 by the rotation of the motor 200.

  When gripping the measurement target, which is a workpiece (the claw is closed), the rotational torque of the ultrasonic motor 200 is used. For the workpiece gripping function, for example, the following three methods can be switched. (1) The claw part is closed by rotating the ultrasonic motor at a constant speed. (2) The ultrasonic motor is rotated at a constant speed, the claw portion is closed, the work is gripped, and the rotation of the motor is stopped when the rotation speed is reduced by a specified rate. (3) The ultrasonic motor is rotated at a constant speed, and the claw part is closed. When the distance between the left and right claw parts reaches a specified distance [mm], the motor stops rotating.

  In the gripping portion configured as shown in FIG. 6, the holding torque is large and the gripping of the workpiece can be continued even if no current is flowing through the motor after the workpiece is gripped (the claw portion is closed). However, since it is an ultrasonic motor, there is no problem during measurement even if it is flowing.

  By using an ultrasonic motor as a motor used in each part, the electromagnetic field generated by the motor can be measured without affecting the communication characteristic measurement result of the communication antenna of the non-contact communication IC chip. In addition, a small robot hand can be configured.

  Here, the operation principle of the ultrasonic meter used in the present invention will be described. There are two types of operating principles of an ultrasonic motor: a standing wave method and a traveling wave method.

  FIG. 7 is a diagram for explaining the principle of a standing wave type ultrasonic motor. The standing wave type ultrasonic motor includes a piezoelectric vibrator (also referred to as a longitudinal vibrator) 50 that is integrated by sandwiching a piezoelectric ceramic 51 between a pair of metals 52. When an AC voltage near the resonance frequency of the piezoelectric vibrator 50 is applied to the piezoelectric ceramic 51, longitudinal vibration is generated. An output extracting vibration piece 53 is attached to one end of the piezoelectric vibrator 50 and is inclined with respect to the moving body 55 by an angle θ. The tip of the vibrating piece 53 repeatedly strikes the moving body 55 to move the moving body 55 in a certain direction. The standing wave type ultrasonic motor is characterized in that the output per unit volume is large and the driving efficiency is high in terms of operation principle compared to the traveling wave type ultrasonic motor. However, because the output transmission part of the vibrator is the same place and its contact area is small, wear of the output transmission part is large, and the method of output transmission is basically the same direction, so it is difficult to reverse Has disadvantages.

  FIG. 8 is a diagram for explaining the principle of a traveling wave type ultrasonic motor. In the traveling wave type ultrasonic motor, a piezoelectric body 59 and an elastic body 58 such as a metal are bonded to each other to form a vibrating body 60, and the moving body 55 is placed in pressure contact with the vibrating body 60 by means such as a spring. . The piezoelectric ceramic 59 is bonded to one surface of an elastic body 58 as a stator. A wear-resistant friction material 57 is provided on the surface of the moving body 55 to reduce wear. The piezoelectric ceramic 59 is an element that generates ultrasonic vibrations. When a specific high frequency voltage is applied, the piezoelectric ceramic 59 itself expands and contracts due to electrostriction. When two sets of drive electrodes are formed on the piezoelectric ceramic 59 and an AC voltage having a predetermined phase difference is applied to both sets, the ultrasonic vibration generated thereby is continuously unidirectional while bending the stator. move on. The ultrasonic vibration that rises and falls and travels in this waveform is called a traveling wave. The points on the surface of the vibrating body 60 move along an elliptical locus. The moving body 55 contacts the vibrating body 60 only at the wavefront of the traveling wave, and is frictionally driven by an elliptical locus to move in a direction opposite to the traveling direction of the traveling wave.

  The traveling wave type ultrasonic motor has lower driving efficiency than the standing wave type, but the contact area between the vibrating body and the moving body changes continuously with the progress of the elastic wave, and the contact area is large. Wear can be reduced. Further, the traveling direction of the traveling wave can be changed by simply switching the phase difference between the two applied voltages to ± 90 degrees. Thus, the reversing operation can be easily performed by reversing the traveling direction of the traveling wave.

FIG. 9 is a diagram for explaining a driving method of the traveling wave type ultrasonic motor.
In this case, two AC voltages E1 and E2 having a predetermined phase difference (90 degrees) are applied simultaneously to two sets of piezoelectric ceramic drive electrodes.

Standing wave 1: ε sinωt cos kx
Standing wave 2: ε cosωt sin kx
ε sinω t coskx + ε cosω t sin kx
= Ε sin (ωt−kx)
Here, ε is an amplitude value of vibration, ω is a number for each week, t is a time, k is a wave number, and x is a coordinate in a traveling direction.

The characteristics of the traveling wave ultrasonic motor are summarized as follows.
・ Low driving efficiency ・ Contact area between vibrating body and moving body changes continuously with the progress of elastic wave, and because the contact area is large, wear of the contact area can be reduced ・ Easy to reverse ・ High without speed reduction mechanism Torque can be obtained. -Variable speed is easy. -Responsiveness is excellent. -Holding torque is large and no power is required when stationary. -Can be composed of non-magnetic material.

  In this traveling wave method, a rotary ultrasonic motor can be configured by configuring the vibrating body 60 and the moving body 55 in a circular shape.

  FIG. 10 shows an example in which a linear actuator is constructed using a rotary ultrasonic motor. The rotary ultrasonic motor includes a piezoelectric ceramic 63, an elastic body (stator) 64, a rotor 61, a bearing 62, and a rotary shaft 65. A threaded thread 66 is formed or coupled to the rotating shaft 65. On the other hand, a cylindrical screw receiver 67 having a thread groove engaging with the thread on the inner wall is supported in a cylindrical case 68 of the motor so as to be slidable in the longitudinal direction. The cylindrical case 68 is fixed to the motor and is stationary. When the rotor 61 rotates, the rotating shaft 65 fixed to the rotor 61 rotates. By this rotation, the screw 66 is rotated, and the screw receiver 67 is moved along the longitudinal direction. The screw receiver 67 is coupled to the shaft 69, and the shaft 69 moves linearly with the movement of the screw receiver 67.

Non-magnetic materials are used for all ultrasonic motor components. For example, the various parts and materials of the motor constituting the linear motion actuator are as follows.
Stator: Phosphor bronze or ceramic Rotor: Ceramic or aluminum Shaft: Ceramic or phosphor bronze or plastic Bearing: Ceramic Case: Plastic or aluminum or ceramic

  Thus, no magnetic material (ferromagnetic material) is used for any of the components. This eliminates as much as possible the possibility that the motor affects the communication characteristics. Among short-range wireless communication specifications, those using induced electromotive force due to magnetic flux may affect inductive coupling and modulation processing if some magnetic force (magnetic flux) is present in the communication area. Therefore, even in an ultrasonic motor using a magnetic material, the configuration using a non-magnetic material improves the reliability and versatility of the system.

  FIG. 11 shows a configuration example of a spherical ultrasonic motor. A spherical rotor 71 is sandwiched between a pair of piezoelectric ceramics (stators) 72 from both sides thereof. A non-magnetic material is also used as a component of this spherical ultrasonic motor.

  FIG. 12 shows a control PC 140 and its peripheral devices as a configuration example of the communication characteristic measurement system in the present embodiment.

  Although not shown, the control PC 140 includes a CPU, a storage device such as a ROM and an HDD that store the control program, a memory such as a RAM that provides temporary storage and a work area, an input / output interface, An input device such as a keyboard and a mouse and a display device such as an LCD and a CRT are provided. Various peripheral devices are connected to the control PC 140.

  In the example of FIG. 12, the control PC 140 is provided with a camera 311 that provides a photographing function for obtaining a still image and a moving image, and a non-contact communication IC reading function (including a modulation / demodulation function, an encryption / decryption function, and a command analysis generation function). Reader / writer 312, manipulator / gripping unit 313 that provides a terminal movement gripping function, thermometer / hygrometer 314 that provides temperature / humidity detection function, smart card IC 315 that provides cryptographic processing function / random number generation function / hash function function A measuring instrument (including a measuring antenna) 316 providing a resonance frequency measuring function is connected.

  The control PC 140 includes a monitoring camera control function 301 for controlling the camera 311, an inter-reader communication control function 302 for communicating with the non-contact communication IC reader / writer 312, and a robot control function for controlling the manipulator / gripping unit 313 (motor control function, 303 including a feedback control function), a temperature / humidity meter control function 304 for controlling the thermometer / hygrometer 314, a smart card IC communication control function 305 for controlling the smart card IC 315, and a measurement for controlling the resonance frequency measuring device 316. A device control function 306 is included.

  FIG. 13 is a flowchart showing an example of a processing procedure of the communication characteristic measurement system in the present embodiment.

  First, the control PC that controls the entire measurement system checks the operation of peripheral devices such as a camera, a measuring device, a reader, a manipulator, and a smart card IC (S10).

  Next, the gripping unit grips the measurement target portable terminal (S11).

  Therefore, the antenna center point to be measured is brought into close contact with the center point of the resonance frequency measuring antenna 130, and the measured value from the measuring device 132 is read and stored (S12). Next, a predetermined static test and dynamic test are executed (S13, S14). In the static test, the communication state of the non-contact communication IC is confirmed in a state where the measurement object is fixed to each measurement position with respect to the reader / writer antenna 120. However, the measurement target is usually used while being moved with respect to the reader / writer antenna 120 while being held by the user. Therefore, in the dynamic test, the communication state is confirmed while moving the measurement target with respect to the reader / writer antenna 120. Details of these tests will be described later. After the test is completed, the gripper releases the measurement object and returns it (S15).

  Note that the order of steps S12, S13, and S14 is arbitrary.

  Thereafter, if there is a next measurement target (S16, Yes), the process returns to step S12 and the above test is performed on the new measurement target.

  If there is no next measurement target, the hash value is calculated from the stored collection data items (resonance frequency measurement data item, static test data item, and dynamic test data item), and an electronic signature (both digital signature and digital signature) is obtained. (S17) and the measurement result data and the measurement environment data are transmitted to the certification authority together with the electronic signature (S18). An electronic signature is signature information attached to a digital document in order to guarantee its validity, and is usually generated using a digital signature technique in a well-known public key cryptosystem. Recipient confirms that the document was actually sent from the sender (has not been tampered with) by decrypting the sender's digital signature using the sender's public decryption key can do. The certification body conducts a predetermined certification based on the measurement result data and returns the result to the certification applicant.

FIG. 14 shows an example, items, values, etc. of items and values of the collected data of the static test in step S13 shown in FIG. Specifically, it is as follows. 14 shows an example in which an orthogonal axis type actuator as shown in FIGS. 1 and 2 is used, but a robot arm type actuator as shown in FIG. 4 is used for a static test. You can also.
(1) Measurement point XYZ coordinates: Three-dimensional coordinates indicating the measurement point. For example, (X, Y, Z) = (-114.110, -370.500, 175.160)
Joint motor rotation angle: This is the rotation angle of the joint motor. The “joint motor rotation angle” in this example assumes the spherical ultrasonic motor 230 of FIG. 1 or FIG. For example, (A, B, C) = (90.000, -180.000, 0.000), where A, B, and C represent the inclinations of the grip portion in the X, Y, and Z axis directions, respectively.
Communication justification rate: The degree of normal communication between the reader / writer and the measurement target. For example, RESPONSE = 99.9% (0999/1000)
As the “measurement point XYZ coordinates”, a plurality of trajectory patterns are prepared in advance with a combination of a plurality of positions that define a trajectory of a measurement target moving along with the passage of time as a trajectory pattern.
Note that XY is an orthogonal axis on a plane parallel to the pedestal, and Z is an axis perpendicular to the XY plane (parallel to the support column 155). The position of both center points in the state where the center point of the reader / writer antenna 120 and the contactless communication IC antenna center point are in close contact is defined as the origin (X, Y, Z) = (0.000, 0.000, 0.000) of the measurement position.
(2) Ambient temperature / humidity: Units are ° C. and% rh (relative humidity).
(3) Camera image at the measurement point XYZ coordinates at the time of measurement: A captured image of a camera having a resolution of VGA size or more, JPEG, etc. are desirable.
(4) Camera image at the time of gripping the housing before the start of measurement: A captured image of a camera having a resolution of VGA size or more, JPEG, or the like is desirable.
(5) Camera image when the housing is returned after the measurement is completed: A captured image of a camera having a resolution equal to or higher than the VGA size, JPEG, or the like is desirable.
(6) Network time stamp (preferably using a value obtained through a time distribution business certified supplier): NTP and SNTP format time stamps described in RFC1305 and RFC-2030 (7) Measurement target case ID: Measurement target Unique identification information assigned to each case (8) Non-contact communication ICID: Unique identification information assigned to each product of the non-contact communication IC
(9) Measurement person ID: Unique identification information assigned to each measurement person, or a value obtained from a smart card IC connected to the control PC may be substituted.

FIG. 15 shows an example, a unit, an explanation, etc. of items and values of the collection data of the dynamic test of step S14 shown in FIG. Specifically, it is as follows. The example of FIG. 15 shows an example using a robot arm type actuator, but an orthogonal axis type actuator can also be used for a dynamic test.
(1) XYZ coordinates for each motion locus during measurement: For example, (X1, Y1, Z1) = (-114.110, -370.500, 175.160) → (X2, Y2, Z2) = (35.890, -370.50, 255.16) → (X3, Y3, Z3) = (-234.110, -370.50, 275.16) → (X4, Y4, Z 4) = (-114.110, -370.500, 375.16)
The XYZ axes are the same as in the static test. However, when a robot arm is used, the root position of the robot arm is the origin of the robot arm system.
Each joint motor rotation speed: J1 = 20.000, J2 = 15.000, J3 = 22.000, J4 = 32.000, J5 = 15.000, J6 = 0.000,
Here, J1 to J6 represent the rotation speeds of the joints in the case of the manipulator (robot hand) shown in FIG. In the case of the manipulator of FIG. 5B, each spherical joint serves as two rotational speeds. The “rotational speed” of the spherical motor is determined by at least one of the pressure value and the frequency of the AC voltage to be applied.
Communication correct answer rate: RESPONSE = 99.9% (0999/1000)
(2) Ambient temperature / humidity: Units are ° C. and% rh (relative humidity).
(3) Camera image at the measurement point XYZ coordinates at the time of measurement: A captured image of a camera having a resolution of VGA size or more, MOTION JPEG, or the like is desirable.
(4) Camera image at the time of gripping the housing before the start of measurement: A captured image of a camera having a resolution of VGA size or more, MOTION JPEG, or the like is desirable.
(5) Camera image when the housing is returned after the measurement is completed: A captured image of a camera having a resolution of VGA size or more, MOTION JPEG, or the like is desirable.
(6) Network time stamp (preferably using a value obtained through a time distribution business certified supplier): NTP and SNTP format time stamps described in RFC1305 and RFC-2030 (7) Measurement target case ID: Measurement target Unique identification information assigned to each case (8) Non-contact communication ICID: Unique identification information assigned to each product of non-contact communication IC (9) Measurement person ID: Unique identification assigned to each person in charge of measurement information

  FIG. 16 shows a specific processing example of a part of the static test in the present embodiment. In the static test, as described above, when measuring a three-dimensional NULL point, it is necessary to measure an enormous position of 200 million 200 × 200 × 200 million on the XYZ axes. However, it takes a lot of time to execute the test by repeatedly stopping the movement at each position. Therefore, in the present embodiment, the measurement object is moved at a constant speed within a test range in a three-dimensional space predetermined as a communication guarantee area (this operation is referred to as seek). The motor power remains on during the seek operation. Based on the result of the communication during the seek, an area where communication is impossible is determined, and then detailed measurement is performed.

  First, the position of the measurement object is several hundred mm in the X axis + direction, several hundred mm in the negative direction, and several hundred mm in the Y axis + direction from the origin position (X, Y, Z) = (0.000, 0.000, 0.000) A measurement range by seeking such as several hundred mm in the-direction and several hundred mm in the Z-axis + direction is acquired (S21). The measurement range may be manually input by the measurer, or a fixed value may be set for each model and each reading device.

  Next, monitoring of the response value of the reader / writer is started (S22), and the measurement object is sought along a predetermined route so as to cover the entire range within the measurement range (S23). For example, a certain Z value within a certain measurement range is raster scanned on the XY plane with a predetermined raster width, and the same raster scanning is repeatedly performed while changing the Z value by a predetermined value. Alternatively, the vertical scanning from Z to MAX or MIN or MIN to MAX is repeatedly performed from the position (0,0) on the XY plane to (MAX, MAX) sequentially.

  If monitoring communication failure occurs during monitoring of the response value at the time of seek, the coordinates of the point are stored (S24).

  After completion of the seek operation, monitoring is intensively performed around the stored point (for example, in the range of XYZ ± 5 to 15 mm) (S25). In this case, the test is performed with the measurement object stationary at each position. At each coordinate position, the joint motor is turned off, and in order to calculate a correct answer rate with a comma zero percent, a monitoring communication packet exchange is tried a predetermined number of times (for example, 1000 times or more) between the reader / writer and the measurement target.

As described above, the effects of the embodiment of the present invention include the following points.
(1) It is possible to automatically collect accurate and accurate data in a portable electronic device (built-in non-contact communication IC) or a communication characteristic measurement work between a non-contact communication IC card and a non-contact communication IC card reader / writer / antenna. it can. The collected data is more accurate without the influence of the electromagnetic field generated by the motor built in the automated measurement system, compared to the data acquired by the existing method.
(2) It is possible to accurately acquire measurement data in a state where the measurement target is moving in the spatial position. In addition, the posture of the measurement object can be controlled with three degrees of freedom in the spatial position.
(3) The communication antenna of the non-contact communication IC (equivalent to ISO 14443) built in the mobile phone is the shape and material of the antenna, such as stranded wire, single wire, wire, flexible, enamel, 3-roll product, 4-roll product, etc. Communication characteristics vary greatly depending on factors such as body shape. Accumulating a lot of precise sample data and analysis is required to accumulate know-how as a manufacturer during set development. The development man-hour is reduced.

  The preferred embodiments of the present invention have been described above, but various modifications and changes other than those mentioned above can be made. For example, the relationship between the measurement object and the reader / writer is relative, and the positional relationship between the two may be reversed.

  In addition, when the measurement system described in the above embodiment is used as an in-house measuring device instead of a system for verification, the functions of the smart card IC communication control function 305 and the smart card IC 315 shown in FIG. The electronic signature function and communication control function by the smart card IC) and the process of step S17 shown in FIG. 13 are unnecessary.

It is a figure which shows schematic structure of the measurement system which concerns on the 1st Embodiment of this invention. It is a figure which shows the 1st modification of the measurement system of FIG. It is a figure which shows the 2nd modification of the measurement system of FIG. It is a figure which shows schematic structure of the measurement system which concerns on the 2nd Embodiment of this invention. It is explanatory drawing (a) (b) of a robot arm of 6 degrees of freedom. The top view (a) and front view (b) of one structural example of the holding part in embodiment of this invention are shown. It is a figure for demonstrating the principle of a standing wave type ultrasonic motor. It is a figure for demonstrating the principle of a traveling wave type ultrasonic motor. It is a figure for demonstrating the drive method of a traveling wave type ultrasonic motor. It is a figure which shows the example which comprised the linear motion actuator used by embodiment of this invention. It is a figure which shows the structural example of the spherical ultrasonic motor used by embodiment of this invention. It is a figure which shows control PC and its peripheral device as a structural example of the communication characteristic measuring system in embodiment of this invention. It is a flowchart which shows the example of a process sequence of the communication characteristic measurement system in embodiment of this invention. It is a figure which shows the example of the item and value of collection data of step S13 shown in FIG. It is a figure which shows the example of the item and value of collection data of step S14 shown in FIG. It is a figure which shows the one part specific process example of the static test in embodiment of this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 41 ... Rack, 43 ... Pinion, 45, 46 ... Claw, 47 ... Shaft, 50 ... Piezoelectric vibrator, 51 ... Piezoelectric ceramic, 52 ... Metal, 53 ... Vibrating piece, 55 ... Moving body, 57 ... Friction material, 58 ... Elastic body, 59 ... piezoelectric ceramic, 60 ... vibrating body, 61 ... rotor, 62 ... bearing, 63 ... piezoelectric ceramic, 65 ... rotating shaft, 66 ... screw, 68 ... cylindrical case, 69 ... shaft, 71 ... rotor, 110 ... Measurement object, 120 ... reader / writer antenna, 130 ... antenna, 132 ... resonance frequency measuring device, 150 ... pedestal, 155 ... support, 157 ... arm, 163 ... gripping part, 200 ... rotary ultrasonic motor, 210 ... vertical Direction motor, 220 ... Transverse motor, 230 ... Spherical ultrasonic motor, 301 ... Monitoring camera control function, 302 ... Inter-reader communication control function, 304 ... Temperature Hygrometer control function, 305 ... Communication control function, 306 ... Measuring instrument control function, 311 ... Camera, 312 ... Reader / writer, 313 ... Manipulator / gripping unit, 314 ... Thermometer / hygrometer, 315 ... Smart card IC, 316 ... Resonance frequency measuring instrument

Claims (8)

Variable positioning means for holding a measurement object including a non-contact communication IC and changing a position of the measurement object with respect to the reader / writer antenna according to a control signal;
A measurement object including a non-contact communication IC, and a measurement unit for measuring communication characteristics between the non-contact communication IC and the reader / writer antenna,
The variable positioning means uses an ultrasonic motor as a power source.   The communication characteristic measuring system according to claim 1, wherein the ultrasonic motor uses a non-magnetic material for all its components.   The communication characteristic measuring system according to claim 1, wherein the variable positioning means is an orthogonal coordinate type desktop robot. The desktop robot has a gripping part for gripping the measurement object,
4. The communication characteristic measuring system according to claim 3, further comprising posture control means for controlling a posture of at least one of the gripping unit or the reader / writer antenna.   The communication characteristic measuring system according to claim 1, wherein the variable positioning means is a 6-DOF articulated robot.   6. The communication characteristic measuring system according to claim 5, wherein a spherical ultrasonic motor is used as a joint of the 6-DOF articulated robot.   The measurement by the measuring means includes a static test for confirming a communication state of the non-contact communication IC in a state in which a measurement object is fixed at each measurement position with respect to the reader / writer antenna, and for the reader / writer antenna. The communication characteristic measurement system according to claim 1, further comprising at least one of a dynamic test for confirming a communication state while moving the measurement object.   In the static test, the communication state is monitored while moving the measurement target with respect to the reader / writer / antenna in a given three-dimensional space along a predetermined route, 8. The communication characteristic measurement system according to claim 7, wherein the communication state is confirmed by intensively stopping the measurement object.