JP2009003949A - Transponder and sensor measurement system using the transponder - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a measurement system allowing a plurality of transponders-TR3 each incorporating a sensor to simultaneously start measurement through communication between a reader/writer and the plurality of transponders. <P>SOLUTION: A transponder is provided with an integrated identifier UID as a combination of a sensor ID and a chip identifier TID, in addition to an identifier SID unique to a sensor and the chip identifier TID unique to a chip of the transponder. When specifying a transponder and transmitting a measurement command, a reader/writer 203 invalidates the chip identifier TID in the UID of the transponder, validates only information related to a sensor function, and transmits the measurement command including an operation command specific to each kind of sensors. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a transponder, and more particularly to a transponder incorporating a sensor and a sensor measurement system using the transponder.

  Conventionally, there is communication by a reader / writer and a transponder as communication used in this type of sensor measurement system. In this communication, the reader / writer uses an identifier (ID) unique to the transponder.

  First, in order for the reader / writer to recognize each transponder, it is necessary to have each transponder transmit an ID. Therefore, the reader / writer transmits an identification command so as to transmit ID information to the transponder.

  Here, in communication between the reader / writer and the transponder, different signals collide when a plurality of transponders simultaneously return to the reader / writer. This prevents the reader / writer from recognizing the ID of each transponder. Therefore, the reader / writer has a function of controlling a reply from the transponder in order to surely recognize the transponder ID.

  Using this function, the reader / writer acquires the IDs of all transponders. When the ID acquisition is completed, the reader / writer transmits a command to designate the transponder and perform internal processing. When the internal processing is completed, the transponder transmits the completion to the reader / writer.

  When the reader / writer confirms that the transponder has finished the internal processing, the reader / writer performs transmission / reception similar to that of another transponder, and repeats this operation until transmission / reception with all transponders is completed.

  By incorporating the sensor in the transponder, it becomes possible to read the measurement result of the sensor by communication. In addition, a transponder with a built-in sensor can be made as small as an integrated circuit chip by being configured using semiconductor integrated circuit technology. The smaller the size of this transponder, the more various applications it can handle.

  The following is known as a conventional example related to a data processing system between a plurality of transponders and one reader / writer, or a processing system based on wireless communication between a plurality of slave units and a master unit. .

  Japanese Unexamined Patent Publication No. 2000-224673 (Patent Document 1) relates to a radio telemeter system, and a group is formed by a combination of a parent device and a child device, and a group identification signal (group) following a communication synchronization signal (wireless header) ID) is transmitted and a reception state is started from a signal specifying a group to shorten the reception state time, thereby disclosing a wireless telemeter system that quickly determines a wireless unit.

  Japanese Patent Laid-Open No. 10-293893 (Patent Document 2) relates to a wireless meter reading method for continuously collecting information of a meter connected to a slave unit, while connecting an external device and a master unit with a line and from the external device. In accordance with the control of the main unit and the slave unit by wireless connection, after collecting the measuring instrument information of the measuring instrument connected to the slave unit, without disconnecting the line between the external device and the master unit, A wireless metering method is disclosed in which the master unit and another slave unit are wirelessly connected again in accordance with control from an external device, and the next measuring instrument information connected to the other slave unit is collected in the same manner. Has been.

  Japanese Patent Laid-Open No. 08-273088 (Patent Document 3) relates to a wireless meter reading method using a radio wave to measure a meter such as a water meter or a gas meter, and a meter subject to collective meter reading in a meter reading request message. The meter which should respond is specified by transmitting only a specific small number of digits designated by the ID number in order, and the meter which has received the meter-reading message has the ID of the designated digit corresponding to the meter. A wireless meter reading method is disclosed in which when the ID matches, the meter reading value is returned in order according to the order of the transmitted ID.

  Japanese Laid-Open Patent Publication No. 05-041888 (Patent Document 4) relates to a wide-area data collection device, and is provided for each residential unit that converts usage data such as electric power, water supply or gas into a required high-frequency signal and sends it through radio waves. A data sending means, a small group data receiving means provided for each small group of a plurality of dwelling units, receiving radio waves from the individual data sending means and demodulating the data, and receiving a plurality of the small group data via a communication line or the like A wide area data collecting means for collecting data of each dwelling unit received by the means, and a dwelling unit code set in advance for identifying the dwelling unit and a type of data set in advance in the individual data sending means A storage unit for storing the type code is provided, and a dwelling unit code read from the storage unit and an identification code corresponding to the type of data are attached to the front of the data and transmitted. Global data collection apparatus is disclosed that urchin configuration.

JP 2000-224673 A JP-A-10-293893 Japanese Patent Laid-Open No. 08-273088 Japanese Patent Laid-Open No. 05-041888

  As the semiconductor process is miniaturized to reduce the size of the sensor, the influence of variations in elements cannot be ignored. By providing the sensor itself with a function for correcting an error, a certain degree of correction is possible, but it is difficult to compensate with only the correction function inside the sensor as the required accuracy increases. Therefore, in addition to the sensor's own correction function, the measurement results of each sensor can be averaged using a plurality of transponders that incorporate the same type of sensor, thereby reducing the effects of device variations. it can. A result that is almost the same as the result that should be measured is derived by the correction function and averaging.

  FIG. 1 shows a case where the value of the measurement item changes with time. The horizontal axis is time, and the vertical axis is the value of the measurement item. When transmitting a measurement command and a measurement result read command to the transponder that measures the measurement item, the transponder ID can be used. As shown in FIG. 1, when the value of a measurement item changes with time, the transmission / reception of a measurement command and the transmission / reception of a read command are performed one by one with respect to N transponders while specifying a transponder using this ID. And the value of the measurement object in the time zone t1 in which the first transponder is measuring, the value of the measurement item in the time zone t2 in which the second transponder is measured,..., The N−1th transponder measures. The value of the measurement item in the time zone tN−1 is different from the value of the measurement item in the time zone tN where the Nth transponder is measuring. Therefore, in this method, each transponder measures the value of the measurement item in a different time zone, and cannot measure the measurement item in the same time zone. Further, when the average value of the measurement results measured by each transponder is obtained, it is not in the same time zone, and the average value of the measurement results of each transponder in the same time zone cannot be calculated.

  That is, in the method of designating a transponder using an ID unique to the transponder, when a plurality of sensors are used, a plurality of sensors cannot perform measurement simultaneously. Therefore, the measurement item as shown in FIG. 1 cannot take advantage of the measurement using a plurality of transponders.

  An example of representative means of the present invention for solving the above-described problems is as follows. That is, the transponder according to the present invention includes a first coil antenna, a communication unit that performs communication with the reader / writer via the first coil antenna, and a sensor unit that includes a sensor that performs a predetermined measurement. A transponder having a chip control unit for controlling the communication unit and the sensor unit, wherein the sensor unit has sensor identification information unique to the sensor, and the chip control unit has chip identification information unique to the transponder And unique integrated identification information obtained by combining the chip identification information and the sensor identification information.

  According to the present invention, integrated identification information, which is unique identification information combining the identification information unique to the transponder and the sensor identification information of the sensor unit, is provided in the transponder, and for the sensor measurement command, the chip of the integrated identification information By disabling the identification information, the transponders containing sensors having the same sensor identification information can simultaneously measure at the same time. Thereby, even for a measurement object whose characteristics change with time, an average value of a plurality of sensor measurement data at the same time can be obtained, and the accuracy and reliability of the sensor measurement data can be improved.

  Embodiments according to the present invention will be described below in detail with reference to the accompanying drawings.

  As a measurement system using a plurality of transponders, FIG. 2 shows the configuration of a measurement system that detects biomolecules such as DNA or protein by measuring bioluminescence.

  In FIG. 2, a solution 201 in a test tank 200 includes a plurality of types of transponders TR1, TR2, and TR3 that incorporate a sensor and wirelessly transmit and receive measured data and commands from the reader / writer with a reader / writer. Is put.

  In FIG. 2, a temperature sensor (Th sensor) that measures the temperature of the solution as an example of measurement data necessary to determine the type of DNA, a pH sensor (pH sensor) for detecting the ion concentration in the solution, and A plurality of three types of transponders, TR2 and TR3, each of which is an optical sensor (Pho sensor) for detecting DNA by bioluminescence are placed in the solution. In addition, since it will become complicated when many transponders are shown, FIG. 2 only shows that there are a plurality of three types of transponders in the test tank, and does not limit the type of each transponder. It goes without saying that a large number of transponder chips can be used as needed to increase the accuracy of the measurement data.

  This measurement system controls the reader / writer (R / W) 203, which communicates with the transponders in these solutions via the coil antenna 202, the reader / writer, and processes the acquired measurement data. It is composed of a host system control device (SYS_CTL) 204 composed of a personal computer (PC) or the like that performs discrimination or the like.

  FIG. 3 is a block diagram showing the internal configuration of the reader / writer 203. The reader / writer includes a wireless communication circuit (RFCKT) 301 to which a coil antenna 202 for communicating with a transponder is connected, an oscillator (OSC) 303 whose transmission frequency is controlled by a control circuit (R / W_CTL) 304, A modulator (MOD) 302 that modulates the transmission frequency generated by the oscillator 303 and sends it to the wireless communication circuit, and a demodulator that demodulates the signal sent from the transponder received by the wireless communication circuit via the coil antenna 202 Circuit (DEM) 305. Here, the control circuit controls the modulation frequency of the modulator and the RF frequency of the RF communication circuit based on a control signal from the host system controller (SYS_CTL) 204 outside the reader / writer.

  FIG. 4 is a block diagram showing an internal configuration of the transponders TR1, TR2, and TR3. The electromagnetic wave transmitted from the reader / writer 203 is received by the coil antenna 400, rectified by the rectifier circuit (RCFY) 401, and stabilized by the power supply circuit (PWS) 402. This stabilized power is supplied to each circuit in the transponder as the power of the transponder TR (note that the power line is omitted in FIG. 4).

  The electromagnetic wave received by the coil antenna 400 is sent to a demodulation circuit (DEM) 404 and a clock generation circuit (CKGEN) 405, where signal demodulation and transponder internal clock signal generation are performed. The modulation circuit (MOD) modulates various commands and data transmitted from the control unit (TR_CTL) 414 via the coil antenna 400. The rectifier circuit, the demodulation circuit, the clock generation circuit, and the modulation circuit constitute a communication unit (COM) 415 for communicating with the reader / writer.

  The sensor unit (SENS) 413 measures measurement objects such as temperature, light intensity, and pH (pH) in the test tank. Analog data, which is a measurement result detected by the sensor unit, is converted into digital data by an analog / digital conversion circuit (ADC) 411 and stored in a storage circuit (MEM) 410.

  The control unit (TR_CTL) 414 controls the demodulation circuit, the clock generation circuit, the clock generation circuit, the sensor unit, the analog / digital conversion circuit, and the storage circuit. The control unit also includes a slot generation unit (SLTGEN) 407 for preventing a collision at the time of ID identification during communication with the reader / writer 203.

  The sensor unit has sensor identification information (SID) 412. The sensor identification information is information indicating the measurement target of the sensor unit, and is assigned for each measurement target. For example, transponders having a sensor unit whose temperature is to be measured have common sensor identification information. Further, a transponder having a sensor unit whose temperature is a measurement target and a transponder having a sensor unit whose measurement target is light have different sensor identification information. Therefore, by designating the sensor identification information, transponders having sensor units that measure the same measurement object can be designated at a time.

  Further, the control unit obtains chip identification information (TID) 409 which is an ID unique to the chip constituting the transponder, and integrated identification information (UID) 408 unique to each transponder in which the chip identification information and the sensor identification information are combined. Have. That is, different transponders have different chip identification information and different integrated identification information.

  5A shows chip identification information (TID), FIG. 5B shows sensor identification information (SID), and FIG. 5C shows integrated identification information (UID). For example, if the TID is composed of m-bit data and the SID is composed of n-bit data, the UID is data composed of a concatenation of TID and UID. The relationship between the UID, the TID, and the SID is not particularly limited only to the concatenation, and it is sufficient that the UID is specified from the TID and the SID.

  In the embodiment shown in FIG. 4, only one sensor unit is described, but a plurality of types of sensor units having different measurement objects may be provided. In this case, the transponder has a plurality of sensor identification information and chip identification information corresponding to a plurality of types of measurement objects.

  FIG. 6 is a diagram showing a command transmitted by the reader / writer (R / W) to the transponder (TR), its code, and operation description.

  The integrated identification information request command (Req_UID) is represented by codes C01 and C02, and requests the identification information UID of the transponder before measurement, that is, in steps 801 to 803 shown in FIG. 8 and steps 900 to 902 shown in FIG. . The code C01 represents a verification slot, and the code C02 has a function of generating a slot in the transponder and transmitting a UID to the reader / writer when the slot generated in the transponder matches the verification slot C01. C01 changes at a constant interval (for example, 000, 001, 010...), And the interval and period are controlled by the reader / writer side. When C02 is received, the transponder generates a slot, but uses a part of the UID as an element for generating the slot (for example, a part of the UID is directly used as a verification slot).

  Here, which part of the UID is designated is controlled by the reader / writer. If the reply signals collide in step 901, Req_UID is transmitted again after one cycle. In this case, a part of the UID used when generating the slot uses a part different from the previous part (for example, when S1, S2, and S3 are used in the first period, the next period is S4, S5, and S6). C02 is controlled to use.

  Basically, the transponder executes the operation specified by the operation code when receiving its own integrated identification information. However, while receiving an operation command related to measurement and operating, the chip identification information is invalidated, that is, when the sensor identification information of its own is received.

  In the following, as a description of steps 804 to 807, a preprocessing execution command for executing preprocessing that the R / W transmits to each transponder in steps 903 to 904 is shown.

  As shown in FIG. 6, the temperature sensor pre-processing execution command (Th_SID) is composed of codes C04, C03, C05, and C06. The code C04 represents a Th sensor SID operation code, the code C03 represents a TID, the code C05 represents a temperature sensor SID, and the C06 represents a temperature sensor parameter. Th_SID is a command for only the transponders having Th sensors (temperature sensors) to execute the preprocessing operation all at once. Code C04 is preprocessing including initialization of the temperature sensor, and invalidation of the chip identification information TID constituting the UID (ie, only the sensor identification information SID is validated) between steps 1004 to 1007 shown in FIG. Has function.

  The optical sensor pre-processing execution command (Pho_SID) is composed of codes C07, C03, C08, and C09 (see FIG. 6). The code C07 represents the SID operation code of the Pho sensor, the code C03 represents the TID, the C08 represents the Pho sensor SID, and the C09 represents the Pho sensor parameter. Pho_SID is a command for executing preprocessing operations only for transponders having a Pho sensor. The code C07 has a preprocessing operation including initialization of the optical sensor and a function of invalidating the identification information TID of the chip constituting the UID between steps 1004 to 1007.

  The pH sensor preprocessing execution command (ph_SID) is composed of codes C010, C03, C011, and C012. A code C010 represents a pH_SID operation code, a code C03 represents a TID, a code C011 represents a pH sensor SID, and a code C012 represents a pH sensor parameter. pH_SID is a command for executing pre-processing operations only for transponders having a pH sensor all at once. The code C010 has a pre-processing operation including initialization of the pH sensor and a function of invalidating the TID of the chip constituting the UID between steps 1004 to 1007.

  When the preprocessing operation is completed, measurement is performed. Hereinafter, as an explanation of steps 808 to 811, the R / W is transmitted to the sensor unit of each transponder in steps 905 and 906 to perform the operation of converting the measurement result into digital data and storing it in the storage circuit 410. Indicates the measurement execution command.

  The temperature sensor measurement execution command (Meas_Th_SID) includes codes C013, C03, and C05. A code C013 represents an operation code for Meas_Th_SID of the Th sensor, C03 represents a TID, and C05 represents a SID for a temperature sensor. Meas_Th_SID is a command for executing only the transponders having a Th sensor from measurement to storage of measurement results. The code C013 has functions of executing measurement in steps 1008 to 1011 and invalidating the chip identification information TID constituting the UID (that is, validating only the sensor identification information SID).

  The optical sensor measurement execution command (Meas_Pho_SID) is composed of codes C014, C03, and C08. The code C014 represents the operation code for Meas_Pho_SID of the Pho sensor, the code C03 represents TID, and the C08 represents the SID for Pho sensor. Meas_Pho_SID is a command for executing the storage of the measurement result from the measurement only for the transponder having the Pho sensor. The code C014 has functions of executing measurement in steps 1008 to 1011 and invalidating the chip identification information TID constituting the UID (that is, validating only the sensor identification information SID).

  The pH sensor measurement execution command (Meas_pH_SID) is composed of codes C015, C03, and C011. A code C015 represents an operation code for Meas_pH_SID of the pH sensor, a code C03 represents TID, and C011 represents a SID for pH sensor. Meas_pH_SID is a command for executing the storage of the measurement result from the measurement of only the transponder having the pH sensor. The code C015 has functions of executing measurement in steps 1008 to 1011 and invalidating the chip identification information TID constituting the UID (that is, validating only the sensor identification information SID).

  When the transponder includes a sensor unit having measurement objects other than temperature, light, and pH, a preprocessing execution command and a measurement execution command corresponding to the sensor unit are prepared.

  The measurement result request command (Req_Resl) is a command for requesting a measurement result to each transponder. The code C016 is a measurement result transmission command stored in the storage circuit 410, and the code C03 is a TID. In order to designate a transponder, a normal UID is used, but the TID is also unique to each transponder, and since the R / W has information on the sensor built in each transponder from the acquired UID, the TID may be used. .

  FIG. 7 is a diagram showing a command transmitted from the transponder (TR) to the reader / writer (R / W), its code, and a description of the operation. The code C23 is sent to the reader / writer in step 802 and step 1002, and includes a UID that is a combination of TID and SID. The code C21 is transmitted to the reader / writer in steps 806, 1007 and steps 810, 1011. The code C22 is transmitted to the reader / writer in steps 813 and 1014.

  FIG. 8 is a ladder chart showing the measurement operation of the reader / writer and the transponder TR.

  First, the reader / writer 203 transmits a UID request command Req_UID in order to acquire the identification information UID of the transponder in the test tank from each transponder chip (801).

  When the transponder receives the command Req_UID, the transponder determines whether the transmitted slot and the slot generated in the transponder match, and if they match, the transponder transmits the UID to the reader / writer side. Note that a UID is used when generating a slot in the transponder (for example, a part of the UID is used as it is).

  When the reader / writer stops receiving the UID returned from the transponder, it determines that all the UIDs have been acquired (803).

  Next, the reader / writer transmits a preprocessing execution command for causing the transponder, such as Th_SID, Pho_SID, and pH_SID, to perform a preprocessing operation, to the transponder. For example, when the temperature measurement is to be executed by the transponder, Th_SID, which is a preprocessing execution command based on the SID of the temperature sensor, is transmitted.

  The transponder in the test tank that has received the pre-processing execution command compares the SID specified by the pre-processing execution command with the SID in the transponder. (Discharge by applying light) is started (805). In this case, all of the transponders within the effective radio wave area from the reader / writer and having the SID specified by the preprocessing execution command perform the preprocessing operation all at once.

  The transponder that has completed the preprocessing transmits a preprocessing completion notification command Res_Compl that notifies the reader / writer that the preprocessing has been completed (806).

  The reader / writer receives Res_Compl from all transponders having the SID specified by the preprocessing execution command (807).

  Thereafter, the reader / writer transmits a measurement execution command such as Meas_Th_SID, Meas_Pho_SID, Meas_pH_SID, and the like to be measured by the sensor in the transponder to the transponder (808). For example, when causing the transponder to perform temperature measurement, Meas_Th_SID, which is a pre-processing execution command based on the SID of the temperature sensor, is transmitted.

  The transponder receives the measurement execution command. When the SID specified by the measurement execution command matches the SID in the transponder, the transponder operates the sensor and starts measurement (809). In this case, all of the transponders having the SID specified by the measurement execution command operate the sensor all at once.

  The transponder that has finished the measurement transmits a measurement end notification command Res_Compl that informs the reader / writer of the end of the measurement (810).

  The reader / writer receives Res_Compl from all transponders having the SID specified by the measurement execution command (811).

  Thereafter, the reader / writer transmits a measurement result request command Req_Resl for reading the temperature measurement data stored in the storage circuit by the transponder to the sensor Th transponder (812).

  When receiving the measurement result request command, the transponder transmits a measurement result transmission command Req_Resl to the reader / writer when the UID specified by the measurement result request command matches the UID in the transponder (813). In this case, the measurement results are transmitted to the reader / writer in order from the transponder having the UID specified by the measurement result request command.

  When the reader / writer acquires the measurement results from all the transponders specified by the measurement result request command, the reader / writer ends the measurement.

  Here, the SID specified by the preprocessing execution command and the measurement execution command is changed to the SID specifying the temperature sensor, the SID specifying the optical sensor, and the SID specified by the pH sensor, and the steps (803) to (814) are performed. By repeating the above, it is possible to specify and measure different measurement items such as temperature, light, and pH.

  FIG. 9 is a flowchart showing the operation of the reader / writer 203 in more detail.

  First, the reader / writer 203 transmits a UID request command Req_UID in order to obtain the identification information UID of the transponder in the test tank from each transponder chip (900).

  The reader / writer side recognizes the UID of the transponder returned from the transponder and stores it in the storage device. If the UID cannot be recognized (NO), the reader / writer side returns to step 900 and again returns to the UID request command Req_UID. Is transmitted (901).

  When the transponder returns the UID and the reader / writer 203 recognizes it, the transponder terminates the transmission of the UID. Therefore, if the reader / writer stops receiving the UID returned from the transponder side, all the UIDs are acquired. Judgment is made (902).

  Next, the reader / writer transmits a preprocessing execution command based on the SID (903). For example, when the temperature measurement is to be executed by the transponder, Th_SID, which is a command for specifying the temperature sensor SID and executing preprocessing, is transmitted. For example, when the temperature measurement is to be executed by the transponder, Th_SID, which is a command for specifying the temperature sensor SID and executing preprocessing, is transmitted.

  The reader / writer receives a pre-processing end command Res_Compl from each transponder (904).

  Thereafter, a measurement execution command based on the SID is transmitted to the transponder (905). For example, when causing the transponder to perform temperature measurement, Meas_Th_SID, which is a command for performing measurement by designating by the SID of the temperature sensor, is transmitted.

  The reader / writer receives an end command Res_Compl informing that the temperature measurement is finished from each transponder (906), and then sends a command Req_Resl for reading the temperature measurement data stored in the storage circuit by each transponder to the sensor Th transponder. Transmit (907).

  When the reader / writer has acquired all the temperature measurement data, the reader / writer terminates the temperature measurement (908).

  The reader / writer checks whether all measurement items have been completed (909), and ends if the data of all measurement items has been obtained. If there are still measurement items remaining, the reader / writer is ready for the next measurement item. Returning to step 1003, the next measurement item is measured.

  FIG. 10 is a flowchart showing the operation of the transponder.

  When the transponder receives the command Req_UID (1000), it determines whether the slots match and if they match (1001), the transponder sends a UID to the reader / writer side (1002) and collides on the reader / writer side. If this occurs, the process returns to (1000) and receives the Req_UID command again. If there is no collision, the process waits until a preprocessing command is received (1003).

  The transponder (1004) compares the SID specified by the preprocessing execution command with the SID in the transponder (1005), and if they match, starts the preprocessing operation (1006). For example, when Meas_Th_SID, which is a command for performing measurement by designating with the SID of the temperature sensor, is received, the transponders having the temperature sensor start preprocessing operations all at once.

  The transponder notifies the reader / writer of an end command Res_Compl (code C21) notifying that the preprocessing has ended (1007).

  The transponder receives the measurement execution command (1008). The transponder compares the SID specified by the measurement execution command and the SID in the transponder (1009), and if they match, the measurement by the sensor unit is started (1010). The transponder that has finished the measurement transmits an end command Res_Compl that informs the reader / writer of the end of the measurement (1011).

  When the Th transponder receives the command Req_Resl (1012), it determines the UID (1013), transmits the measurement result to the reader / writer in order from the transponder with the matching UID (1014), and then ends the operation.

  As described above, in this embodiment, the integrated identification information UID, which is identification information obtained by combining the chip identification information TID of the transponder and the identification information SID of the sensor, is provided in the transponder. By disabling the TID, transponders incorporating sensors having the same sensor identification information SID can be operated simultaneously. Therefore, it is possible to prevent a sensor whose sensor identification information SID does not match from starting measurement and detecting an erroneous measurement result.

  Thus, in each measurement, if the transponder containing the same type of sensor is a measurement command from the reader / writer, for example, temperature measurement, the measurement command Meas_Th_SID based on the temperature sensor identification information SID can be used for optical measurement. In the case of a pH measurement command Meas_Pho_SID, if it is a pH measurement, the measurement is started simultaneously by a pH measurement command Meas_pH_SID. Therefore, even if the characteristic value of the measurement object changes with time as shown in FIG. Since measurement using a plurality of transponders in each time zone tN to be originally measured can be performed, N pieces of measurement data at the same time can be acquired. This makes it possible to obtain average value data at the same time, and obtain a measurement result with improved accuracy for one measurement item by averaging a plurality of measurement data at the same time. Furthermore, by using the correction function of the transponder sensor, it is possible to further improve accuracy of data and obtain highly reliable measurement data.

  FIG. 11 shows an example of DNA detection by bioluminescence. A primer that specifically binds to a target site of DNA is hybridized to the target DNA ((1) in FIG. 11 (a)). When specific binding occurs, pyrophosphate (PPi) is released by a DNA elongation reaction. PPi is converted to ATP in the presence of APS and sulfurrase, and bioluminescence is generated by the luminescence reagent luciferin-luciferase (see (3) of FIG. 11 (a), FIG. 11 (b)). If the primer and the target do not bind specifically, the extension reaction does not occur and PPi is not released, so no light emission occurs. Therefore, DNA can be typed by the presence or absence or intensity of luminescence. At this time, if the amount of the sample is small, PPi also decreases, and accurate measurement of weak light is required. In such a case, data accuracy can be improved by using a plurality of optical sensor transponders. In the case of the match in FIG. 11 (a), light emission starts simultaneously with the dispensing of the luminescent reagent, and light is attenuated when ATP is consumed. Bioluminescence starting with the dispensing of the luminescent reagent depends on the composition of the luminescent reagent, but changes with a short time constant, rises rapidly after dispensing, and decreases rapidly after taking the peak value. In measurement of such a light emission pattern, it is necessary to drive each transponder (TR3) at exactly the same timing. Simultaneous control using SID becomes effective. In FIG. 11 (a), the number of TR3 is two. In particular, when the number of TR3 increases, the time for starting signal accumulation of the optical sensor and the time for starting the conversion of the ADC become equal to each other. Can be obtained, and highly accurate data can be obtained.

  These measurement data obtained by the reader / writer 203 are sent to the host system control device 204, and the average value of the data, aggregation processing, comparison with other accumulated data, etc. are performed, and the obtained measurement results The DNA is discriminated by this.

  In the present embodiment, in the operation shown in FIG. 10 of the transponder, when the UID request command Req_UID is received from the reader / writer, it is determined whether or not the slot transmitted in step 1001 matches the slot generated based on the UID. The transponder with the matching slot transmits the UID to the reader / writer.

  As described above, the preferred embodiment of the present invention has been described by taking as an example a wireless biomeasurement system for measuring a biomolecule such as DNA. However, the present invention is not limited to the above embodiment, and departs from the spirit of the present invention. Of course, various design changes can be made without departing from the scope. For example, it can be applied to temperature measurement of sterilization treatment by short-time heating of beverages, quality control of chemicals at pharmaceutical factories, etc. In the case of sterilization treatment of milk etc., a temperature sensor is built in. When a plurality of transponders are used and sterilization is performed by heating at 100 ° C. for several seconds, for example, a plurality of data at the same time can be obtained, so that the temperature of the heat treatment can be accurately measured.

  Further, when used for the inspection of a biological sample, for example, if a plurality of transponders with built-in optical sensors and transponders with built-in temperature sensors are used to measure bioluminescence, a plurality of DNAs and proteins related to the same time are measured. Since data is obtained, the accuracy and reliability of the test result of the biological sample are improved.

The figure which shows the case where the value of a measurement item changes with time. The figure which shows the structure of a wireless bio-measurement system. The block diagram which shows the internal structure of a reader / writer. The block diagram which shows schematic structure of a transponder. The figure which shows the relationship between chip | tip identification information, sensor identification information, and integrated identification information. The command transmitted to a transponder from a reader / writer, and its operation explanatory drawing. The figure which shows an example of the command returned from a transponder to a reader / writer, and its content. The ladder chart which shows the outline of the measurement operation | movement between a reader / writer and a transponder. 6 is a flowchart showing the operation on the reader / writer side. The flowchart which shows operation | movement of a transponder. The figure which shows the Example of DNA detection by bioluminescence.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 200 ... Test tank, 201 ... Solution, 202 ... Coil antenna, 203 ... Reader / writer (R / W), 204 ... Host system controller (SYS_CTL), 301 ... Wireless communication circuit (RFCKT), 302 ... Modulator (MOD) , 303 ... Oscillator (OSC), 304 ... Control circuit (R / W_CTL), 305 ... Demodulation circuit (DEM), 400 ... Coil antenna, 401 ... Rectification circuit (RCFY), 402 ... Power supply circuit (PWS), 403 ... Modulator (MOD), 404 ... Demodulation circuit (DEM), 405 ... Clock generation circuit (CKGEN), 407 ... Slot generation unit (SLTGEN), 408 ... Integrated identification information (UID), 409 ... Chip identification information (TID), 410: Memory circuit (MEM), 411: Analog to digital converter (ADC), 412 ... Sensor identification information ( ID), 413 ... sensor unit (SENS), 414 ... control unit (TR_CTL), 415 ... communication unit (COM), t1~tN ... hours, TN ... time required for measurement, TR, TR1 to TR3 ... transponder.

Claims (6)

A test tank containing the solution;
First and second transponders immersed in the solution;
With reader / writer,
A host system controller for controlling the reader / writer;
Each of the first and second transponders includes a first sensor unit whose measurement target is a first measurement target;
Having a second sensor part whose second measurement object is a measurement object;
The first transponder is assigned first chip identification information;
Second chip identification information is assigned to the second transponder,
First sensor identification information is assigned to the first sensor unit,
Second sensor identification information is assigned to the second sensor unit,
The first and second transponders that have received the first measurement execution command including the first sensor identification information from the reader / writer simultaneously operate the first sensor unit to measure the first measurement object. ,
The first and second transponders that have received the second measurement execution command including the second sensor identification information from the reader / writer simultaneously operate the second sensor unit to measure the second measurement object. ,
The first transponder that has received the measurement result request command including the first chip identification information from the reader / writer transmits first measurement data that is a result of the measurement to the reader / writer,
The second transponder that has received the measurement result request command including the second chip identification information from the reader / writer transmits second measurement data that is the measurement result to the reader / writer,
The host system control device obtains average data by averaging the first measurement data and the second measurement data. A test tank containing the solution;
A plurality of transponders immersed in the solution;
With reader / writer,
A host system controller for controlling the reader / writer;
Each of the transponders has a sensor unit with a different measurement target,
Each of the transponders is assigned different chip identification information,
The same sensor identification information is assigned to the same sensor unit to be measured,
The transponder that has received the measurement execution command from the reader / writer operates the sensor unit to which the sensor identification information included in the measurement execution command is assigned, performs measurement,
The transponder to which the chip identification information included in the measurement result request command from the reader / writer is assigned, transmits measurement data that is a result of the measurement to the reader / writer,
The host system control device obtains average data by averaging the measurement data from the transponders. Multiple transponders,
With reader / writer,
A host system controller for controlling the reader / writer;
Each of the transponders has a sensor unit whose measurement object is different from each other,
Each transponder is assigned different chip identification information,
The same sensor identification information is assigned to the sensor units having the same measurement target,
The transponder that has received the measurement execution command from the reader / writer drives the sensor unit to which sensor identification information included in the measurement execution command is assigned, performs measurement,
The measurement system, wherein the transponder to which the chip identification information included in a measurement result request command from the reader / writer is assigned transmits measurement data as a result of the measurement to the reader / writer. The measurement system according to any one of claims 1 to 3,
The measurement object is temperature, light intensity, and pH. A test tank containing the solution;
A plurality of transponders immersed in the solution;
With reader / writer,
A host system controller for controlling the reader / writer;
Each of the transponders has a sensor unit with a different measurement target,
Each transponder is assigned different chip identification information,
The sensor unit having the same measurement object is a measurement method in which measurement is performed by a measurement system to which the same sensor identification information is assigned,
The transponder that has received a measurement execution command from the reader / writer operates the sensor unit to which sensor identification information included in the measurement execution command is assigned, and performs measurement.
By the transponder to which the chip identification information included in the measurement result request command from the reader / writer is assigned, the measurement data as the measurement result is transmitted to the reader / writer,
An average data is obtained by averaging the measurement data from each of the transponders by a host system controller that controls the reader / writer. The measurement method according to claim 5,
The measurement method is characterized in that the measurement object is temperature, light intensity, and pH.

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