JP6182754B2 - Measuring device, charging device, and weight measuring system - Google Patents

Description

  The present invention relates to a measuring device, a charging device, and a weight measuring system.

Conventionally, various measuring devices for measuring the weight of an object to be measured have been proposed. A general measuring device includes a load sensor that outputs an electrical signal corresponding to an applied load as a weight detection unit that detects the weight of an object to be measured, and the object to be measured is based on the output value of the load sensor. Calculate the weight of the object.
The load sensor changes with time due to an increase in usage environment, usage frequency, and the like. If measurement is not performed in consideration of such a change with time of the load sensor, the measurement accuracy may be lowered. The weight measured by the measuring device is specified by measuring the force applied to the strain generating body. The force applied to the strain body is given by the product of the weight of the object and the gravitational acceleration. On the other hand, gravitational acceleration varies from region to region. For this reason, when the measurement place is moved, the measurement accuracy may be lowered unless the measurement is performed in consideration of the change in the gravitational acceleration. Therefore, in order to keep the measurement accuracy of the measurement device good, it is necessary to appropriately calibrate the measurement device.

In this specification, the meaning of calibration is defined in JIS Z 8103-2000 “Measuring terms” as “values indicated by measuring instruments or measuring systems, or actual measuring instruments or reference substances. "A series of tasks that establish the relationship between the value represented and the value realized by the standard. Calibration does not include adjusting the instrument to correct the error." As a specific calibration work, for example, a reference weight, which is a reference device with a known weight, is placed on the placing portion of the measuring device, and the known weight value of the reference weight, the output value of the weight detecting portion, The difference is calculated as correction data. This correction data is used for correcting the detection value by the weight detection unit in the subsequent weight measurement.
As a technique related to calibration of a measuring device, for example, in Patent Document 1, the usage status of the measuring device is detected, a calibration time is set according to the usage status, and the calibration of the measuring device is automatically performed at the calibration time. Techniques for performing are disclosed.

JP-A-6-331427

By the way, although calibration is necessary from the viewpoint of improving measurement accuracy, weight cannot be measured during calibration work. In the above-described conventional technique, the calibration time can be automatically set so that the calibration is executed in a period in which the probability of measuring the weight is low by grasping the usage state of the measuring device.
However, the automatically set calibration time is only an estimate based on the past use situation, and the user does not always use the measuring device at the automatically set calibration time. If the user uses the measuring device at the automatically set calibration time, automatic calibration is not performed. Therefore, it is necessary to perform measurement with poor accuracy or perform manual calibration before use.
The present invention has been made in view of the above circumstances, and in a measuring device using a secondary battery as a power source, by improving the user's convenience by executing calibration in a time when the weight is not measured. Is one of the resolution issues.

In order to solve the above-described problem, a measurement device according to a first aspect of the present invention is a measurement device that uses a secondary battery charged by a charging device as one of the power sources, and uses electric power supplied from the charging device. A charging circuit for charging the secondary battery; a placement part on which the object to be measured is placed; a weight detection part for detecting the weight of the object to be measured placed on the placement part; and the weight detection A reference unit weight value storage unit for storing a reference unit weight value for calibrating the unit, and after the charging circuit starts charging the secondary battery, if a predetermined condition is satisfied, the reference unit weight value, A correction data generating unit for performing correction based on the detection value by the weight detection unit and generating correction data for correcting the detection value by the weight detection unit; and a correction data storage unit for storing the correction data. It is characterized by providing.
According to the measurement device according to the first aspect of the present invention, the measurement device is also calibrated at the time of charging, which is an essential operation for the measurement device using the secondary battery as a power source. Therefore, the burden on the user is greatly reduced as compared with the conventional measuring apparatus that needs to perform work by separately determining the necessity for charging and calibration. In addition, since calibration is automatically performed when the measuring device is charged, it is possible to prevent forgetting to calibrate and extremely reduce the calibration frequency.
By the way, when using a portable measuring device, it is preferable to perform calibration at the measurement location before measurement. Accordingly, the portable measuring device is frequently required to be calibrated as compared with the stationary measuring device. In addition, since the rechargeable measuring device has different discharge characteristics of the secondary battery depending on the use environment and the like, it is necessary to charge the battery frequently to some extent in order to be usable when desired. Because of the above-described circumstances, charging and calibration of the measuring device are matters that the user must always care about, and these operations themselves are troublesome for the user. According to the measuring device according to the first aspect of the present invention, charging and calibration are performed at the same time, so the burden on the user is greatly reduced.
It is preferable that the predetermined condition can be calibrated. For example, a predetermined condition may be that a predetermined time required for the user to place the reference device on the placement unit has elapsed from the start of charging, or the reference device may be placed on the placement unit by some method. It may be a predetermined condition that this is detected.

In order to solve the above-described problem, in the measurement apparatus according to the second aspect of the present invention, the correction data generation unit is configured so that the value detected by the weight detection unit is within a predetermined range including the reference unit weight value. It is characterized by a predetermined condition.
According to the measurement apparatus of the second aspect of the present invention, calibration is performed in a state where the reference unit is forgotten to be placed on the placement unit due to a user's mistake or the like or an object other than the reference unit is placed. Can be prevented from being executed. That is, the accuracy of calibration is ensured.

In order to solve the above-described problem, in the measurement device according to the third aspect of the present invention, the charging device includes a first sensor that detects at least one of temperature and humidity, and the first sensor during the charging. A sensor value transmission unit that transmits the output value of the first sensor to the measurement device, and the measurement device includes a second sensor that detects a detection target similar to the detection target of the first sensor; The sensor value receiving unit that receives the output value of the first sensor transmitted by the sensor value transmitting unit, and the correction data generating unit generates the correction data, and the output value of the first sensor; The second sensor is calibrated based on the output value of the second sensor, sensor value correction data for correcting the output value of the second sensor is generated, and the correction data storage unit When storing data , And to store the sensor value correction data.
According to the measuring device of the third aspect of the present invention, calibration of at least one of the temperature sensor and the humidity sensor included in the measuring device is automatically performed when the measuring device is charged by the charging device. Therefore, the measurement accuracy can be further improved by applying the second aspect of the present invention to a measurement apparatus that calibrates the weight detection unit based on at least one of temperature and humidity.

In order to solve the above-described problem, a measurement device according to a fourth aspect of the present invention is the measurement device according to the first to third aspects, and authentication data to be used for authentication processing of the measurement device by the charging device, It includes an authentication data transmitting unit that generates and transmits based on an identifier unique to the measurement device.
According to the measurement device of the fourth aspect of the present invention, authentication data used for authentication processing of the measurement device by the charging device is generated by the measurement device and transmitted to the charging device. Thereby, the authentication process of the measuring device by the charging device can be performed. Therefore, the discrimination of counterfeits according to the measurement device according to the fourth aspect is facilitated.

In order to solve the above-described problem, a measurement device according to a fifth aspect of the present invention is a measurement device according to any one of the first to fourth aspects and has the following configuration. First, the charging device includes a power feeding circuit for supplying power to the secondary battery, a pair of power feeding electrodes electrically connected to the power feeding circuit, and a dummy power feeding electrode related to the power feeding electrode. The measuring device includes a pair of power receiving electrodes provided so as to be in contact with the power feeding electrode during the charging, and one or more dummy provided so as to be in contact with the dummy power feeding electrode during the charging. A power receiving electrode; and a charging circuit that electrically connects the power receiving electrode and the secondary battery.
According to the measuring device of the fifth aspect of the present invention, due to the presence of the dummy power receiving electrode, it is visually recognized that many power receiving electrodes are provided, and which electrode actually functions as the power receiving electrode. Only the manufacturer can know if it is. Therefore, it becomes difficult to manufacture a counterfeit product related to the measurement device.

In order to solve the above-described problem, a measurement device according to a sixth aspect of the present invention is the measurement device according to the first aspect and has the following configuration. First, the charging device generates encrypted authentication data obtained by encrypting authentication data used for authentication processing of the measurement device with an encryption key, transmits the encrypted authentication data to the measurement device, and the encrypted data decrypted by the measurement device An authentication unit that receives decryption authentication data that is authentication data, determines whether or not the decryption authentication data and the authentication data match, and determines that the authentication data matches, an authentication unit that starts charging the secondary battery Prepare. The measurement apparatus includes an encrypted data receiving unit that receives the encrypted authentication data, and a decryption processing unit that generates the decrypted authentication data by decrypting the encrypted authentication data with a decryption key corresponding to the encryption key. And a decrypted data transmission unit for transmitting the decrypted authentication data to the charging device.
According to the measurement device according to the sixth aspect of the present invention, authentication processing of the measurement device by the charging device can be performed. Therefore, the discrimination of counterfeits according to the measuring device according to the sixth aspect is facilitated.

In order to solve the above-described problem, a measurement device according to a seventh aspect of the present invention is the measurement device according to the first aspect, wherein the charging device includes a power feeding circuit for supplying power to the secondary battery, The power supply circuit selects three or more power supply electrodes that are electrical contacts with the measuring device at the time of charging, and two power supply electrodes from the three or more power supply electrodes at the time of charging. A first selection circuit that is electrically connected, and the measurement device is supplied from the charging device and three or more power receiving electrodes provided to contact each of the three or more power feeding electrodes. A charging circuit that charges the secondary battery with the generated power; a second selection circuit that selects two power receiving electrodes from among the three or more power receiving electrodes and electrically connects to the charging circuit; It is characterized by providing.
According to the measuring device according to the seventh aspect of the present invention, since three or more power receiving electrodes are provided, a manufacturer other than the manufacturer can know which of the power receiving electrodes actually functions. Can not. Moreover, even if the measuring device is disassembled, it is only known that all the power receiving electrodes can be used for actual charging in terms of the circuit configuration. Therefore, it becomes difficult to manufacture a counterfeit product of the measuring device.

In order to solve the above-described problem, a charging device according to an eighth aspect of the present invention detects a weight of a workpiece placed on the placement portion on which the workpiece is placed and a placement portion on which the workpiece is placed. A charging device for charging a secondary battery that is a power source of a measuring device, comprising: a weight detection unit that performs measurement; and a reference unit weight value storage unit that stores a reference unit weight value for calibrating the weight detection unit, A power supply circuit for supplying power to the secondary battery, and a load corresponding to the reference unit weight value with respect to the mounting unit during a period in which power is supplied to the secondary battery by the power supply circuit. And a load portion that continues to be added.
According to the charging device of the eighth aspect of the present invention, it is possible to charge the measuring device in which the measuring device is also calibrated at the time of charging, which is an essential work for the measuring device using the secondary battery as a power source. .

In order to solve the above-described problem, a charging device according to a ninth aspect of the present invention is the charging device according to the eighth aspect, wherein a sensor that detects at least one of temperature and humidity, A sensor output value transmission unit configured to transmit an output value of the sensor to the measurement device.
According to the charging device of the ninth aspect of the present invention, when the measuring device is charged by the charging device, data used for calibration of at least one of the temperature sensor and the humidity sensor included in the measuring device is transferred from the charging device to the measuring device. Sent to.

In order to solve the above problems, a charging device according to a tenth aspect of the present invention includes an authentication data receiving unit that receives authentication data generated based on an identifier unique to the measurement device, and the authentication data is appropriate. An authentication determination unit that determines whether the data is authentication data; and when the authentication determination unit determines that the authentication data is appropriate authentication data, the power supply circuit is supplied with power to the secondary battery. And a control unit to be started.
According to the charging device of the tenth aspect of the present invention, only a genuine measuring device that has been successfully authenticated is charged.

In order to solve the above problems, a charging device according to an eleventh aspect of the present invention is a charging device according to any one of the eighth to tenth aspects, and has the following configuration. First, the measuring device includes a charging circuit for charging the secondary battery, two power receiving electrodes electrically connected to the charging circuit, and the power receiving electrode in substantially the same shape as the power receiving electrode. And one or more dummy power receiving electrodes which are metal pieces provided in the vicinity of the electrodes. The charging device is electrically connected to the power feeding circuit, and two charging electrodes are provided corresponding to each of the power receiving electrodes so as to come into contact with each of the power receiving electrodes during the charging. A power supply electrode and at least one dummy power supply electrode that is a metal piece provided corresponding to each of the dummy power reception electrodes so as to come into contact with the dummy power reception electrode during the charging.
According to the charging device of the eleventh aspect of the present invention, due to the presence of the dummy power supply electrode, it is visually recognized that a large number of power supply electrodes are provided, and which electrode is actually functioning. Only the manufacturer can know. Therefore, it becomes difficult to manufacture a counterfeit product related to the measuring device corresponding to the charging device according to the eleventh aspect of the present invention.

In order to solve the above problem, a charging device according to a twelfth aspect of the present invention is the charging device according to any one of the eighth to eleventh aspects, wherein the load portion is the reference unit weight value. It is a press part which presses the above-mentioned mounting part so that the load corresponded to may be added to the above-mentioned mounting part.
According to the charging device of the twelfth aspect of the present invention, the user can calibrate the measuring device without performing the work of placing or removing the reference weight on the placing portion. That is, the user can automatically charge and calibrate the measuring device simply by placing the measuring device on the charging device in a manner that allows charging.

In order to solve the above-described problem, a charging device according to a thirteenth aspect of the present invention is the charging device according to the eleventh aspect, and includes a pressing portion adjusting mechanism that adjusts the pressing force by the pressing portion. To do.
According to the charging device of the thirteenth aspect of the present invention, since the pressing force by the pressing portion can be adjusted as appropriate, a load corresponding to a desired reference unit weight value can be applied to the mounting portion of the measuring device. it can.

In order to solve the above problem, a charging device according to a fourteenth aspect of the present invention is the charging device according to the eighth aspect or the ninth aspect, wherein the load portion is a weight corresponding to the reference unit weight value. The charging device includes a housing portion that houses the weight, a weight sensor that detects that the weight has been removed from the housing portion, and the weight sensor that removes the weight from the housing portion. And a control unit that transmits a calibration permission signal for permitting execution of the calibration to the measuring device when a predetermined time has elapsed since the detection time.
According to the charging device of the fourteenth aspect of the present invention, calibration can be prevented from being performed in a state in which the weight serving as the reference device is not placed on the placement portion of the measurement device.

In order to solve the above-described problem, a charging device according to a fifteenth aspect of the present invention detects a weight of a measurement part placed on the placement part on which the measurement object is placed, and the placement part. A charging device for charging a secondary battery, which is a power source of a measuring device, and a reference load value storage unit that stores a reference load value for calibrating the weight detection unit. A battery for charging a secondary battery, and an electrode portion that is an electrical contact with the measuring device at the time of charging, wherein the reference load value is a total weight value of the charging device, and the charging device Is placed on the mounting portion through the electrode portion during the charging.
According to the charging device of the fifteenth aspect of the present invention, since the charging device itself is a reference device (reference weight), when the measuring device is charged using the charging device, the measuring device is placed. The reference device (reference weight) is always placed on the part. Therefore, when charging a measuring device having a receiving electrode on the mounting portion of the reference device (reference weight) and performing calibration at the same time as charging, the charging device according to the fifteenth aspect is used. It is possible to prevent the measurement device from being calibrated in a state where the instrument (reference weight) is not placed on the placement unit.

In order to solve the above problems, a charging device according to a sixteenth aspect of the present invention is the charging device according to the eighth aspect, and has the following configuration. First, the measuring device includes three or more power receiving electrodes that are electrical contacts with the charging device, a charging circuit for charging the secondary battery, and two of the three or more power receiving electrodes. And a first selection circuit that selects a power receiving electrode and electrically connects to the charging circuit. The charging device includes three or more power feeding electrodes provided corresponding to each of the power receiving electrodes and the three or more power receiving electrodes so as to come into contact with each of the three or more power receiving electrodes during the charging. And a second selection circuit for selecting two of the power supply electrodes and electrically connecting the two power supply electrodes to the power supply circuit.
According to the charging device of the sixteenth aspect of the present invention, since three or more feeding electrodes are provided, other than the manufacturer can know which of the feeding electrodes actually functions. Can not. Moreover, even if the charging device is disassembled, it can be understood from the circuit configuration that all the feeding electrodes can be used for actual charging. Therefore, it becomes difficult to manufacture a counterfeit product related to the measurement device corresponding to the charging device.

In order to solve the above-described problem, a weight measurement system according to a seventeenth aspect of the present invention includes a measurement device that uses a secondary battery charged by a charging device as one power source, and a charging device that charges the secondary battery. , Wherein the measuring device includes a placement unit on which the measurement object is placed, and a weight detection unit that detects the weight of the measurement object placed on the placement unit. A reference unit weight value storage unit for storing a reference unit weight value for calibrating the weight detection unit, and when the predetermined condition is satisfied after the charging circuit starts charging the secondary battery, the reference unit A correction data generation unit that performs the calibration based on the weight value and the detection value by the weight detection unit and generates correction data for correcting the detection value by the weight detection unit, and a correction data storage unit that stores the correction data And the charging The device includes a load unit that applies a load corresponding to the reference unit weight value to the mounting unit when performing the charging, and a power supply circuit that supplies power to the secondary battery. Features.
According to the weight measurement system of the seventeenth aspect of the present invention, the measurement apparatus is also calibrated at the time of charging, which is an essential operation for the measurement apparatus using the secondary battery as a power source. Therefore, the burden on the user is greatly reduced as compared with the conventional measuring apparatus that performs charging and calibration separately.

In order to solve the above-described problem, a weight measurement system according to an eighteenth aspect of the present invention is the weight measurement system according to the seventeenth aspect, wherein the correction data generation unit detects a value detected by the weight detection unit as the reference value. The predetermined condition is that it is within a predetermined range including the container weight value.
According to the weight measurement system of the eighteenth aspect of the present invention, in a state where the reference unit is forgotten to be placed on the placement unit due to a user's mistake or the like, or an object other than the reference unit is placed, It is possible to prevent the calibration from being executed. That is, the accuracy of calibration is ensured.

In order to solve the above problem, a weight measurement system according to a nineteenth aspect of the present invention is the weight measurement system according to the eighteenth aspect, wherein the charging device uses authentication data used for authentication processing of the measurement device, An encryption processing unit that generates encrypted authentication data encrypted with an encryption key, an encrypted data transmission unit that transmits the encrypted authentication data to the measurement device, and the encrypted authentication data decrypted by the measurement device The decrypted data receiving unit that receives the decrypted authentication data, the authentication determining unit that determines whether or not the decrypted authentication data and the authentication data match, and the authentication determining unit A control unit that causes the power supply circuit to start supplying power to the secondary battery, and the measurement device receives the encrypted authentication data. A decryption unit that decrypts the encrypted authentication data with a decryption key corresponding to the encryption key and generates the decryption authentication data; and a decryption data transmission unit that transmits the decryption authentication data to the charging device; It is characterized by that.
According to the weight measuring system of the nineteenth aspect of the present invention, the charging device performs authentication processing of the measuring device, and only the measuring device that has succeeded in the authentication processing is charged. Specifically, according to the weight measurement system of the nineteenth aspect of the present invention, authentication data used for authentication processing of the measurement device by the charging device is generated by the measurement device and transmitted to the charging device. Therefore, it becomes easy to distinguish counterfeit products related to the measurement device provided in the weight measurement system according to the nineteenth aspect.

In order to solve the above problems, a weight measurement system according to a twentieth aspect of the present invention is the weight measurement system according to the seventeenth aspect, wherein the charging device uses authentication data used for authentication processing of the measurement device, An encryption processing unit that generates encrypted authentication data encrypted with an encryption key, an encrypted data transmission unit that transmits the encrypted authentication data to the measurement device, and the encrypted authentication data decrypted by the measurement device The decrypted data receiving unit that receives the decrypted authentication data, the authentication determining unit that determines whether or not the decrypted authentication data and the authentication data match, and the authentication determining unit A control unit that causes the power supply circuit to start supplying power to the secondary battery, and the measurement device receives the encrypted authentication data. A decryption unit that decrypts the encrypted authentication data with a decryption key corresponding to the encryption key and generates the decryption authentication data; and a decryption data transmission unit that transmits the decryption authentication data to the charging device; It is characterized by that.
According to the weight measurement system of the twentieth aspect of the present invention, authentication processing of the measurement device is performed by the charging device. Therefore, it becomes easy to distinguish counterfeit products related to the measuring device provided in the weight measuring system according to the twentieth aspect.

In order to solve the above-mentioned problem, a weight measurement system according to a twenty-first aspect of the present invention is the weight measurement system according to the twentieth aspect, in which the load portion is placed by pressing the placement portion. A pressing unit that applies a load to the unit, and a pressing unit adjustment mechanism that adjusts a pressing force by the pressing unit, and the control unit does not match the authentication data with the decrypted authentication data by the authentication determination unit. If it is determined, the pressing unit adjusting mechanism is controlled such that a load smaller than or larger than the reference unit weight value is applied to the mounting unit.
According to the weight measurement system of the twenty-first aspect of the present invention, the pressing unit supports a weight of a value less than the reference unit weight value or a value exceeding the reference unit weight value with respect to the placement unit of the measurement device for which the authentication process has failed. The power to do is added. As a result, an erroneous calibration is performed in the measurement apparatus, and it cannot be used as a measurement apparatus unless a new appropriate calibration is performed thereafter. It is considered that the number of consumers who purchase the counterfeit product of the measuring device is reduced by recognizing that such processing is performed by the consumer layer.

According to the weight measurement system of the twenty-second aspect of the present invention, in the weight measurement system according to the seventeenth aspect, the charging device includes a first sensor that detects at least one of temperature and humidity; A sensor value transmission unit that transmits the output value of the first sensor to the measurement device during the charging, and the measurement device detects a detection target similar to the detection target of the first sensor. The second sensor, a sensor value receiving unit that receives the output value of the first sensor transmitted by the sensor value transmitting unit, and the correction data generating unit generate the correction data and the first data The second sensor is calibrated based on the output value of the second sensor and the output value of the second sensor, sensor value correction data for correcting the output value of the second sensor is generated, and the correction is performed. Data storage It may store the correction data, and to store the sensor value correction data.
According to the weight measurement system of the twenty-second aspect of the present invention, calibration of at least one of the temperature sensor and the humidity sensor included in the measurement device is automatically performed when the measurement device is charged by the charging device. Therefore, by applying the twenty-second aspect of the present invention to a measurement device that calibrates the weight detection unit based on at least one of temperature and humidity, the user can perform the measurement of the measurement device without requiring special work. Measurement accuracy can be improved.

In order to solve the above-described problem, a weight measurement system according to a twenty-third aspect of the present invention is the weight measurement system according to the seventeenth aspect, wherein the charging device includes two power supply electrodes connected to the power supply circuit. And at least one dummy power supply electrode that is a metal piece provided in the vicinity of the power supply electrode in substantially the same shape as the power supply electrode, and the measuring device contacts the power supply electrode during the charging The two power receiving electrodes provided corresponding to each of the power feeding electrodes, and the dummy power feeding electrodes provided corresponding to the dummy power feeding electrodes so as to come into contact with the dummy power feeding electrodes during the charging. It is characterized by comprising one or more dummy power receiving electrodes that are metal pieces, and a charging circuit that electrically connects the power receiving electrode and the secondary battery.
According to the weight measurement system of the twenty-third aspect of the present invention, the presence of the dummy power feeding electrode and the dummy power receiving electrode makes it visually visible that a large number of power feeding electrodes and power receiving electrodes are provided, Only the manufacturer can know if the electrode is functioning. Therefore, it becomes difficult to manufacture a counterfeit product related to the measuring device provided in the weight measuring system according to the twenty-third aspect of the present invention.

In order to solve the above problems, a weight measurement system according to a twenty-fourth aspect of the present invention is the weight measurement system according to the seventeenth aspect, wherein the charging device is electrically connected to the measurement device during the charging. Three or more power supply electrodes that are contacts, and a first selection circuit that selects two power supply electrodes from among the three or more power supply electrodes and electrically connects to the power supply circuit during the charging. The measurement device is supplied by the charging device with three or more power receiving electrodes provided corresponding to each of the power feeding electrodes so as to come into contact with the power feeding electrode during the charging. A charging circuit that charges the secondary battery with electric power; and a second selection circuit that selects two of the three or more receiving electrodes and electrically connects to the charging circuit. It is characterized by.
According to the weight measurement system of the twenty-fourth aspect of the present invention, since three or more feeding electrodes and receiving electrodes are provided, which of these feeding electrodes and receiving electrodes actually functions is determined. Only the manufacturer can know. Moreover, even if the charging device and the measuring device are disassembled, it is only known that all the power supply electrodes and the power reception electrodes can be used for actual charging in terms of the circuit configuration. Therefore, it becomes difficult to manufacture a counterfeit product related to the measurement device provided in the weight measurement system.

The block diagram which shows the structure of the weight measurement system which concerns on 1st Embodiment of this invention. The top view which shows the external appearance structural example of the weight measurement system which concerns on 1st Embodiment at the time of charging a measuring device with a charging device. The side view which looked at the weight measurement system 1 shown in FIG. 2 from the direction shown by the arrow A in FIG. The figure which shows the flowchart of the process in the charge mode of the measuring device which concerns on 1st Embodiment. The block diagram which shows the structure of the weight measurement system which concerns on 2nd Embodiment of this invention. The figure which shows the flowchart of the process in the charge mode of the measuring device which concerns on 2nd Embodiment. The block diagram which shows the structure of the weight measurement system which concerns on 3rd Embodiment. The figure which shows the flowchart of the authentication process by the charging device of the weight measurement system which concerns on 3rd Embodiment. The figure which shows the flowchart of the authentication process by the measuring device of the weight measurement system which concerns on 3rd Embodiment. The figure which shows the flowchart of the authentication process by the charging device of the weight measurement system which concerns on 3rd Embodiment. The figure which shows the flowchart of the authentication process by the measuring device of the weight measurement system which concerns on 3rd Embodiment. The top view which shows the external appearance structural example of the weight measurement system which concerns on 4th Embodiment at the time of charging a measuring device with a charging device. The side view which looked at the weight measurement system shown in FIG. 10 from the direction shown by arrow A in FIG. The top view which looked at the measuring device concerning the 1st modification from the back. The block diagram which shows the structural member peculiar to the measuring device and charging device which concern on a 1st modification. The block diagram which shows the structural member peculiar to the measuring device which concerns on a 2nd modification. The block diagram which shows the structural member peculiar to the charging device which concerns on a 2nd modification. The figure which shows schematic structure of the weight measurement system which concerns on a 3rd modification. The general view side view which shows the structural example of the direction change mechanism with which the weight measurement system which concerns on a 4th modification is provided. The general view side view which shows the structural example of the direction change mechanism with which the weight measurement system which concerns on a 4th modification is provided.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.
[First Embodiment]
FIG. 1 is a block diagram showing a configuration example of a weight measurement system 1 according to the first embodiment of the present invention. The weight measurement system 1 includes a measurement device 10 and a charging device 50.
The measuring device 10 includes a placement unit 11, a weight detection unit 13, an A / D conversion circuit 15, a control unit 17, a power receiving electrode 19, a charging circuit 21, a secondary battery 23, and a storage unit 25. The communication unit 27, the display unit 29, and the operation unit 31 are provided.

An object to be measured which is an object for weight measurement is placed on the placement unit 11. When the object to be measured is placed on the placement unit 11, a load corresponding to the weight of the object to be measured is applied to the weight detection unit 13.
The weight detection unit 13 is a load converter that converts a load applied by placing an object to be measured on the placement unit 11 into an electrical signal and outputs the electrical signal. For example, the weight detection unit 13 includes a strain generating body that is distorted according to an applied load, and a strain gauge that includes a bridge circuit that outputs an analog signal corresponding to the strain of the strain generating body. Hereinafter, the electrical signal output from the weight detection unit 13 is referred to as a weight detection signal. The A / D conversion circuit 15 converts the weight detection signal as an analog signal output from the weight detection unit 13 into a digital signal, and outputs weight detection data.
The control unit 17 comprehensively controls each unit of the measurement device 10. The control unit 17 includes an arithmetic processing unit 17-1, a charging processing unit 17-2, and a calibration processing unit 17-3. The arithmetic processing unit 17-1 calculates the weight value of the object to be measured based on the weight detection data. The charging processing unit 17-2 controls the charging circuit 21 so as to charge the secondary battery with the electric power supplied from the charging device 50. The calibration processing unit 17-3 executes the calibration process of the weight detection unit 13.

The power receiving electrode 19 is an electrical contact with the power feeding electrode of the charging device 50 when the secondary battery 23 is charged. The charging circuit 21 charges the secondary battery with the power supplied from the charging device 50. The secondary battery 23 is a power source of the measurement device 10 and is a rechargeable storage battery.
The storage unit 25 is a rewritable nonvolatile memory such as an EEPROM (Electrically Erasable and Programmable Read Only Memory), and stores various data used for the arithmetic processing by the arithmetic processing unit 17-1. For example, the storage unit 25 stores weight values (hereinafter referred to as reference unit weight values) corresponding to reference weights 101a and 101b, which will be described later, and the like. In addition, the storage unit 25 stores correction data generated by processing related to calibration described later.
The communication unit 27 is a short-range wireless communication module for transmitting and receiving data to and from the communication unit included in the charging device 50. Specifically, the communication unit 27 is a communication module that performs wireless communication of, for example, Bluetooth (registered trademark) standard.
The display unit 29 is a display device such as an LCD (Liquid Crystal Display), for example, and displays the weight value of the measurement object calculated by the arithmetic processing unit 17-1. The operation unit 31 is a key switch for various input operations by the user. Although not shown in FIG. 1, as shown in FIG. 2, in this example, as the operation unit 31, a power switch 31-1 for performing a power on / off operation of the measurement apparatus 10, A calculation switch 31-2 for calculating the weight and a mode setting switch 31-3 for setting the measurement apparatus to various modes are provided.
The operation unit 31 may be integrated with the display unit 29 and provided as a so-called touch panel type operation unit. In such a configuration, a space for providing a key switch separately can be omitted.

The charging device 50 includes a power supply electrode 51, a power supply circuit 53, a control unit 55, a communication unit 57, and a reference device sensor 59.
The power feeding circuit 53 is connected to, for example, a commercial AC power supply (AC power supply), and converts the commercial AC voltage into AC / DC (AC / DC) and supplies it to the measuring device 10. The feeding electrode 51 is an electrical contact with the power receiving electrode 19 of the measuring device 10 when power is supplied to the measuring device 10.
The control unit 55 comprehensively controls each unit of the charging device 50. For example, the control unit 55 controls the power feeding circuit 53 so as to supply power supplied from, for example, a commercial AC power supply (AC power supply) to the measuring device 10.
The communication unit 57 is a short-range wireless communication module for transmitting and receiving data to and from the communication unit included in the measurement device 10. Specifically, the communication unit 57 is a communication module that performs wireless communication of, for example, Bluetooth (registered trademark) standard.
The reference unit detection sensor 59 includes a reference weight (a member denoted by reference numerals 101a and 101b in FIGS. 2 and 3), which is a reference unit for calibrating the measuring apparatus 10, and a reference unit housing portion (in FIGS. 2 and 3). It is detected whether or not it is housed in the members (reference numerals 70a, 70b). As the reference device detection sensor 59, for example, a contact sensor or an infrared sensor can be used.

FIG. 2 is a top view illustrating an external configuration example of the weight measuring system 1 according to the first embodiment when the measuring device 10 is charged by the charging device 50. 3 is a side view of the weight measurement system 1 shown in FIG. 2 as viewed from the direction indicated by the arrow A in FIG.
As shown in FIGS. 2 and 3, the weight measuring system 1 has a measuring device on the charging device 50 so that the power receiving electrode 19 of the measuring device 10 and the power feeding electrode 51 of the charging device 50 are in contact with each other during charging. 10 can be placed.
On the upper surface of the charging device 50, as shown in FIGS. 2 and 3, reference device housing portions 70a and 70b for housing the reference weights 101a and 101b are provided. Further, as described above, the reference device detection sensor 59 which is a contact sensor is provided on the bottom surfaces of the reference device housing portions 70a and 70b. By referring to the output of the reference device detection sensor 59, the control unit 55 of the charging device 50 can determine whether or not the reference weights 101a and 101b are stored in the reference device storage portions 70a and 70b. . For convenience of explanation, in the present example, description will be given below assuming that one of the reference weights 101a and 101b is used for calibration.

  FIG. 4 is a diagram illustrating a flowchart of processing in the charging mode of the measurement apparatus 10 according to the first embodiment. When the measuring device 10 is placed on the charging device 50 in the above-described chargeable mode and set to the charging mode, the control unit 17 controls the charging circuit 21 to start charging the secondary battery 23 ( Step S1). Subsequently, the control unit 17 determines whether or not a predetermined condition is satisfied (step S2). The predetermined condition is that calibration is possible. In this example, the predetermined condition is that the value detected by the weight detector 13 is within a predetermined range including the reference device weight value. That is, when charging is started, a so-called calibration mode is set, and calibration is started when a predetermined condition is satisfied.

  In this example, the control unit 17 compares the weight value detected by the weight detection unit 13 at the time point with the reference unit weight value stored in the storage unit 25, and is detected by the weight detection unit 13. If the weight value is within a predetermined range including the reference device weight value, it is determined that the predetermined condition is satisfied. At this time, the reference weight 101 a or the reference weight 101 b is placed on the placement portion 11.

Satisfying the above conditions is an essential requirement for calibration. If the conditions are not met, calibration is not performed properly, and erroneous measurement values are output in subsequent weight measurements.
By the way, even when the reference device (reference weight 101a, reference weight 101b) is not placed on the placement portion 11 when the condition is determined, an object having a weight value within a predetermined range including the reference device weight value is placed. If it is placed on the placement unit 11, the control unit 17 determines that the condition is satisfied. Although the possibility of such a situation occurring is extremely low, in order to eliminate such a situation, the following determination method is further used in the determination of the condition, and the determination accuracy of whether or not the condition is satisfied is further improved. You may let them.
For example, it is indirectly determined whether or not the reference weight 101a or the reference weight 101b is placed on the placement portion 11 using the output of the reference device detection sensor 59 described above. Usually, the reference weights 101 a and 101 b are used only for calibration of the measuring device 10. For this reason, when the reference weights 101a and 101b are not accommodated in the reference device accommodating portions 70a and 70b, the reference weights 101a and 101b are placed on the placement portion 11 of the measuring apparatus 10. Can be caught. For example, after a predetermined time (for example, about several tens of seconds) has elapsed since the control unit 55 detected that the reference weight 101a or the reference device 101b was taken out from the reference device storage part 70a or the reference device storage part 70b, It can be assumed that the reference weight 101a or the reference device 101b is mounted on the mounting portion 11 of the measuring apparatus 10. Therefore, in this determination method, the following processing is performed.

First, the control unit 55 of the charging apparatus 50 detects that the reference weight 101a or the reference weight 101b has been taken out from the reference device storage unit 70a or the reference device storage unit 70b, and then a predetermined time (for example, about several tens of seconds). When the time has elapsed, a signal for permitting execution of calibration (abbreviated as a calibration permission signal) is generated and transmitted to the measuring apparatus 10 via the communication unit 57.
Next, the control unit 17 of the measuring apparatus 10 compares the weight value detected by the weight detection unit 13 as described above with the reference unit weight value stored in the storage unit 25, and the weight detection unit 13. When the weight value detected by the above is within a predetermined range including the reference device weight value and the calibration permission signal is received, it is determined that <Condition 2> is satisfied. As described above, by performing the above-described determination of the conditions from a plurality of viewpoints, it is possible to prevent the calibration from being performed in a state in which the reference weights 101a and 101b are not placed on the placement unit 11. .

The control unit 17 repeats the process of step S2 until it is determined that the above-described conditions are satisfied. When the control unit 17 determines that the condition is satisfied, the weight value detected by the weight detection unit 13 and the reference unit used in the process of step S1. A difference value Δw from the weight value is calculated (step S3). And the control part 17 produces | generates correction data based on difference value (DELTA) w calculated in step S3 (step S4). Then, the control part 17 memorize | stores the correction data produced | generated by the process in step S4 in the memory | storage part 25 (step S5), and complete | finishes the process which concerns on calibration. Note that the processing related to charging is continued until the charging of the secondary battery 23 is completed or until the charging device 50 and the measuring device 10 are separated from each other and charging becomes impossible.
Incidentally, the correction data generated by the above-described processing and stored in the storage unit 25 is used in the subsequent weight measurement of the object to be measured. That is, the value detected by the weight detection unit 13 is output to the display unit 29 after being corrected based on the correction data. For example, the value detected by the weight detection unit 13 is added / subtracted by the difference value Δw and output to the display unit 29.

As described above, according to the first embodiment of the present invention, the measurement device 10, the charging device 50, and the weight that reduce the work load required of the user when using the measurement device using the secondary battery as the power source. The measurement system 1 can be provided.
Specifically, the measuring device 10, the charging device 50, and the weight measuring system 1 according to the first embodiment of the present invention have the following effects, for example. The calibration of the measurement device 10 is also performed at the time of charging, which is an essential operation for the measurement device 10 using the secondary battery 23 as a power source. Therefore, the burden on the user is greatly reduced as compared with the conventional measuring apparatus that performs charging and calibration separately.
Further, the control unit 17 controls the charging circuit so that the charging of the secondary battery 23 is started only when the value detected by the weight detection unit 13 is within a predetermined range including the reference device weight value. Calibration is executed after it is detected that the reference devices (reference weights 101a and 101b) are placed on the ten placement parts 11. Therefore, it is possible to prevent the calibration from being performed in a state where the reference device (reference weights 101a and 101b) is not placed on the placement unit 11. Moreover, according to the measuring apparatus 10 which concerns on 1st Embodiment, the execution frequency of calibration increases compared with the conventional measuring apparatus which is not calibrated in the case of charge.
By the way, by applying the first embodiment to a portable measuring device, for example, when the user needs to charge the measuring device at a destination measurement location that is carried around, After that, the measurement work can be performed immediately without performing the calibration work again at the measurement location, thereby reducing the work burden on the user and improving the convenience.

[Second Embodiment]
The weight measurement system 1 according to the second embodiment of the present invention performs calibration of a sensor that detects temperature and humidity during charging. FIG. 5 is a block diagram showing the configuration of the weight measurement system 1 according to the second embodiment of the present invention.
In the weight measurement system 1 according to the second embodiment, the measurement device 10 includes a temperature sensor 41 and a humidity sensor 45, and the charging device 50 includes a temperature sensor 61 and a humidity sensor 65. It is different from the weight measurement system 1 of the embodiment. In the measuring apparatus 10 according to the second embodiment, in consideration of the fact that the output signal of the strain generating body included in the weight detection unit 13 changes depending on the temperature and humidity, the weight is based on the output of the temperature sensor 61 and the output of the humidity sensor 65. The weight detection signal output from the detection unit 13 is corrected. Furthermore, in the measuring device 10 according to the second embodiment, the temperature sensor 41 and the humidity sensor 45 are calibrated based on data transmitted from the charging device 50 when the secondary battery 23 is charged. Note that the processing related to the correction of the weight detection signal based on the outputs of the temperature sensor and the humidity sensor is a known technique, and therefore the description thereof will be omitted. Here, the processing related to calibration of the temperature sensor 41 and the humidity sensor 45 itself will be described.

As illustrated in FIG. 5, the measurement device 10 converts the temperature sensor 41 and an analog signal output from the temperature sensor 41 into a digital signal, in addition to the components included in the measurement device 10 according to the first embodiment. An A / D conversion circuit 43, a humidity sensor 45, and an A / D conversion circuit 47 that converts an analog signal output from the humidity sensor 45 into a digital signal are provided.
The charging device 50 includes, in addition to the members included in the charging device 50 according to the first embodiment, a temperature sensor 61, an A / D conversion circuit 63 that converts an analog signal output from the temperature sensor 61 into a digital signal, A humidity sensor 65 and an A / D conversion circuit 67 that converts an analog signal output from the humidity sensor 65 into a digital signal are provided.
Here, the temperature sensor 61 included in the charging device 50 is a highly accurate temperature sensor compared to the temperature sensor 41 included in the measuring device 10, a temperature sensor with a small change with time, or a highly accurate and time-dependent sensor. It is a sensor with little change. Similarly, it is assumed that the humidity sensor 65 included in the charging device 50 is a sensor that has higher accuracy and / or a change with time than the humidity sensor 45 included in the measurement device 10.

  FIG. 6 is a diagram illustrating a flowchart of processing in the charging mode of the measurement apparatus 10 according to the second embodiment. When the measuring device 10 is placed on the charging device 50 in the above-described chargeable mode and is set to the charging mode, the processing of the flowchart shown in FIG. 6 is executed. Of the processes in the flowchart shown in FIG. 6, steps S11 to S15 are steps for performing the same processes as steps S1 to S5 in the flowchart shown in FIG.

After performing the processing of step S11 to step S15, the control unit 17 converts the temperature data that is the output signal of the temperature sensor 41 converted into a digital signal by the A / D conversion circuit 43 and the digital data by the A / D conversion circuit 47. Humidity data that is an output signal of the humidity sensor 45 converted into a signal is acquired (step S16).
Subsequently, the control unit 17 converts the temperature data that is an output signal of the temperature sensor 61 converted into a digital signal by the A / D conversion circuit 63 and the humidity sensor 65 that is converted into a digital signal by the A / D conversion circuit 67. Humidity data, which is an output signal, is acquired from the charging device 50 by the communication unit 27 (step S17).
And the control part 17 calculates the difference value (DELTA) t of temperature based on the temperature data acquired by step S16, and the temperature data acquired by step S17, and the humidity data acquired by step S16, and the humidity acquired by step S17. Based on the data, a humidity difference value Δh is calculated (step S18).

Further, the control unit 17 generates temperature correction data for correcting the output value of the temperature sensor based on the difference value Δt calculated in step S18, and outputs the humidity sensor output value based on the difference value Δh. Humidity correction data for correcting is generated (step S19). Thereafter, the control unit 17 stores the temperature correction data and the humidity correction data generated by the process in step S19 in the storage unit 25 (step S20), and ends the process related to calibration. Note that the processing related to charging continues until the charging of the secondary battery 23 is completed or until the charging device 50 and the measuring device 10 are separated from each other and charging is impossible.
By the way, the temperature correction data and the humidity correction data generated by the processing described above and stored in the storage unit 25 are used for the subsequent correction of the output value of the temperature sensor 41 and the output value of the humidity sensor 45. For example, temperature data from the temperature sensor 41 is added / subtracted by the difference value Δt and output to the control unit 17, and humidity data from the humidity sensor 45 is added / subtracted by the difference value Δh and output to the control unit 17 for weight detection. Used for calibration of the unit 13.
Therefore, the measuring apparatus 10 can obtain the measurement value similar to the measurement value by the temperature sensor 61 and the humidity sensor 65 with at least higher accuracy or smaller change with time than the sensors by the temperature sensor 41 and the humidity sensor 45. The weight detector 13 can be calibrated by the value.

  As described above, according to the second embodiment of the present invention, when the measuring device 10 is charged by the charging device 50, the weight detector 13 is automatically calibrated, and the temperature of the measuring device 10 is provided. Calibration of the sensor 41 and the humidity sensor 45 is also automatically performed. Therefore, according to the second embodiment of the present invention, the calibration of the temperature sensor 41 and the humidity sensor 45 provided in the measurement device 10 is also performed at the time of charging. The measurement accuracy of the device 10 can be further improved.

[Third Embodiment]
The weight measurement system 1 according to the third embodiment of the present invention determines the legitimacy of the measuring device 10 to be charged, and permits charging only when it is authenticated as legitimate. The weight measurement system 1 according to the third embodiment is except that the measurement device 10 and the charging device 50 are each provided with an RFID (Radio Frequency Identification) chip, and authentication processing of the measurement device 10 is performed using the RFID chip. And it is comprised similarly to the weight measurement system 1 of 1st Embodiment.

  FIG. 7 is a block diagram showing the configuration of the weight measurement system 1 according to the third embodiment. As shown in the figure, the measuring apparatus 10 includes an RFID chip 42 in addition to the members included in the measuring apparatus 10 according to the first embodiment. The charging device 50 includes an RFID chip 72 in addition to the members included in the measurement device 10 according to the first embodiment. Here, the RFID chips 42 and 72 are RF (Radio Frequency) chips storing ID (Identification) information. Specifically, the RFID chips 42 and 72 are IC (Integrated Circuit) chips that transmit and receive information by short-range wireless communication, for example.

FIG. 8 is a diagram illustrating a flowchart of authentication processing by the RFID chip 72 of the charging device 50 of the weight measurement system 1 according to the third embodiment. First, when the measuring device 10 is placed on the charging device 50 so that the RFID chip 42 provided in the measuring device 10 and the RFID chip 72 of the charging device 50 can communicate with each other, as shown in FIG. The process of the flowchart is executed. In the weight measurement system 1 according to the third embodiment, the control unit 55 of the charging device 50 controls the power feeding circuit 53 so as not to supply power to the measurement device 10 until an authentication success signal described later is input. In other words, in the weight measurement system 1 according to the third embodiment, charging is permitted only when the charging device 50 determines the validity of the measuring device 10 and authenticates it.
In an authentication process to be described later, an authentication data encryption process is performed by the RFID chip 72 of the charging device 50, and an encrypted authentication data decryption process is performed by the RFID chip 42 of the measurement apparatus 10. Here, the encryption key used for the encryption process by the RFID chip 72 and the decryption key used for the decryption process by the RFID chip 42 are a pair of keys. The encryption key is stored in the RFID chip 72 so that it cannot be read, and the decryption key is stored in the RFID chip 42 so that it cannot be read. By adopting such a configuration, even if the communication content related to the authentication process performed between the charging device 50 and the measurement device 10 is intercepted by a third party, the communication content that the third party intercepted Based on this, it is impossible to illegally manufacture the measuring device 10 whose validity is authenticated.

The RFID chip 72 encrypts the “authentication data” stored therein with the encryption key to generate encrypted authentication data (step S21). Here, the “authentication data” is an identifier unique to each charging device 50, for example. In addition, you may use the data generated at random instead of the identifier intrinsic | native to the charging device 50 as authentication data. Subsequently, the RFID chip 72 transmits the encrypted authentication data generated in step S21 to the measuring device 10 (step S22).
The encrypted authentication data transmitted to the measuring device 10 in step S22 is received by the RFID chip 42 of the measuring device 10 and then decrypted by the RFID chip 42 with the decryption key. The decryption authentication data generated by this decryption is transmitted by the RFID chip 42 of the measuring device 10. Then, the RFID chip 72 of the charging device 50 receives this decryption authentication data (step S23).

  Here, the RFID chip 72 determines whether or not the authentication data matches the decrypted authentication data (step S24). When the authentication data matches the decrypted authentication data (when step S24 is branched to YES), the RFID chip 72 performs a process of causing the measuring device 10 to start charging the secondary battery 23 (step S25). For example, in step S <b> 25, the RFID chip 72 outputs a signal indicating that the authentication process has succeeded (abbreviated as an authentication success signal) to the control unit 55. The control unit 55 controls the power feeding circuit 53 to supply power to the measurement device 10 when an authentication success signal is input in the process of step S25.

  On the other hand, when the authentication data does not match the decrypted authentication data (when step S24 is branched to NO), the RFID chip 72 processes the measurement device 10 as an inappropriate measurement device 10 (step S26). For example, in step S <b> 26, the RFID chip 72 outputs a signal indicating that the authentication process has failed (abbreviated as an authentication failure signal) to the control unit 55. When the authentication failure signal is input, the control unit 55 controls the power feeding circuit 53 so as not to supply power to the measuring device 10 and controls the communication unit 57 so as not to communicate with the measuring device 10.

  FIG. 9 is a diagram illustrating a flowchart of authentication processing by the RFID chip 42 of the measuring device 10 of the weight measuring system 1 according to the third embodiment. First, when the measuring device 10 is placed on the charging device 50 so that the RFID chip 42 provided in the measuring device 10 and the RFID chip 72 of the charging device 50 can communicate with each other, as shown in FIG. The process of the flowchart is executed. In the weight measurement system 1 according to the third embodiment, power is not supplied from the charging device 50 to the measurement device 10 until the charging device 50 successfully authenticates the measurement device 10.

The RFID chip 42 receives the encrypted authentication data transmitted from the RFID chip 72 of the charging device 50 (step S31). Subsequently, the RFID chip 42 decrypts the encrypted authentication data with the decryption key corresponding to the encryption key of the RFID chip 72, and generates the decrypted authentication data (step S32). Then, the RFID chip 42 transmits this decryption authentication data to the RFID chip 72 of the charging device 50 (step S33).
Thereafter, as described above, the RFID chip 72 of the charging device 50 determines whether or not the authentication data and the decrypted authentication data match. When the authentication data and the decrypted authentication data match, the charging device 50 Then, power is supplied to the measurement device 10. On the other hand, when the authentication data and the decrypted authentication data do not match, power is not supplied from the charging device 50 and communication with the charging device 50 is also blocked.

In addition, the authentication processing method of the measuring device 10 in the weight measurement system 1 is not restricted to the example shown in FIG.8 and FIG.9. For example, a simplified authentication processing method as described later may be employed. The simplified authentication processing method will be described below with reference to the flowcharts shown in FIGS.
FIG. 10 is a diagram illustrating a flowchart of authentication processing by the charging device 50. First, when the measuring device 10 is placed on the charging device 50 so that the RFID chip 42 provided in the measuring device 10 and the RFID chip 72 of the charging device 50 can communicate with each other, as shown in FIG. The process of the flowchart is executed. Note that, similarly to the example described with reference to FIGS. 8 and 9, power is not supplied from the charging device 50 to the measuring device 10 until the charging device 50 successfully authenticates the measuring device 10.

The RFID chip 42 generates authentication data (referred to as unique authentication data) to be used for authentication processing by the charging device 50 based on an identifier unique to the measurement device 10 (step S41). Subsequently, the RFID chip 42 transmits this unique authentication data to the RFID chip 72 of the charging device 50 (step S42).
FIG. 11 is a diagram illustrating a flowchart of authentication processing by the measurement apparatus 10. The RFID chip 72 receives the unique authentication data transmitted from the RFID chip 42 of the measuring device 10 (step S51). Subsequently, the RFID chip 72 determines whether or not the unique authentication data received in step S51 is proper unique authentication data (step S52). Specifically, for example, a list of appropriate unique authentication data is stored in advance in the RFID chip 72, and if the unique authentication data received in step S51 is present in the list, the unique authentication data is stored in the proper unique authentication data. What is necessary is just to determine with it being authentication data.

  If the unique authentication data received in step S51 is proper unique authentication data, step S52 is branched to YES, and the RFID chip 72 performs processing for causing the measuring device 10 to start charging the secondary battery 23 (step S53). . For example, in step S53, the RFID chip 72 outputs an authentication success signal to the control unit 55. As described above, the control unit 55 controls the power feeding circuit 53 so that power is not supplied to the measurement device 10 until the authentication success signal is input. When the authentication success signal is input in the process of step S53, the measurement device 10. The power feeding circuit 53 is controlled so as to supply electric power.

  If the unique authentication data received in step S51 is not proper unique authentication data, step S52 is branched to NO, and the RFID chip 72 processes the measuring device 10 as an inappropriate measuring device 10 (step S54). For example, in step S <b> 54, the RFID chip 72 outputs an authentication failure signal to the control unit 55. When the authentication failure signal is input, the control unit 55 controls the power feeding circuit 53 so as not to supply power to the measurement device 10 and also controls the communication unit 57 so as not to communicate with the measurement device 10.

  As described above, according to the weight measurement system 1 according to the third embodiment of the present invention, since the authentication process of the measurement device 10 is executed by the charging device 50, only the legitimate measurement device 10 can be charged. The spread of the counterfeit product is prevented, and the discrimination of the counterfeit product becomes easy at the time of charging.

[Fourth Embodiment]
In the weight measurement system 1 according to the fourth embodiment of the present invention, the charging device 50 applies a load corresponding to the reference device to the placement unit 11 of the measurement device 10 during charging and calibration. The work of placing on the placement unit 11 is unnecessary.
In the weight measurement system 1 according to the fourth embodiment, the charging device 50 is provided with a pressing member 201 and a drive mechanism 203 instead of the reference device housing portions 70a and 70b and the reference device detection sensor 59. The configuration is the same as that of the weight measurement system according to the first embodiment.
FIG. 12 is a top view illustrating an external configuration example of the weight measurement system according to the fourth embodiment when the measurement device is charged by the charging device. 13 is a side view of the weight measurement system 1 shown in FIG. 12 as viewed from the direction indicated by the arrow A in FIG.

  That is, as shown in FIGS. 12 and 13, a pressing member 201 is provided on the upper surface of the charging device 50 according to the fourth embodiment, instead of the reference device housing portions 70 a and 70 b. Furthermore, as shown in FIG. 13, in order to adjust the pressing force applied to the mounting portion 11 by the pressing member 201, a driving mechanism 203 including a stepping motor capable of driving the pressing member 201 is provided. The drive mechanism 203 is connected to the control unit 17. The load applied to the weight detection unit 13 when the placement unit 11 is pressed by the pressing member 201 is detected when the reference device (for example, the reference weights 101a and 101b) is placed on the placement unit 11. The drive mechanism 203 drives the pressing member 201 under the control of the control unit 17 so that the load is the same as the load applied to the unit 13.

As described above, according to the fourth embodiment of the present invention, when the reference unit (for example, the reference weights 101a and 101b) is placed on the placement unit 11 by the pressing member 201 during charging and calibration. A load similar to the load applied to the weight detection unit 13 is applied to the weight detection unit 13. Therefore, the user can calibrate the measurement apparatus 10 without performing an operation of placing or removing the reference weight on the placement unit 11 by himself / herself. In other words, the user simply places the measuring device 10 on the charging device 50 in a chargeable manner, and the measuring device 10 is automatically charged and calibrated. A special effect of not requesting can be obtained.
In addition, by applying the fourth embodiment to the third embodiment that performs the authentication process of the measurement apparatus 10, the “corresponding process to an inappropriate measurement apparatus 10 (step S26) when the authentication process fails. , Step S54) ", more effective processing can be performed. For example, when the authentication process fails (when the measurement device 10 is a counterfeit product), the control unit 55 causes the pressing member 201 to apply a force corresponding to a weight value that is less than the reference device weight value or exceeds the reference device weight value. The drive mechanism 203 is controlled so as to be applied to the placement unit 11. As a result, the counterfeit product is erroneously calibrated and cannot be used as a measuring device until proper calibration is performed thereafter. By recognizing the disadvantages of such counterfeit products to the consumer layer, it is considered that the number of people who purchase counterfeit products of the measuring device 10 is reduced, and the production of counterfeit products of the measuring device 10 can be reduced. it is conceivable that.

As mentioned above, although this invention was demonstrated based on each embodiment, this invention is not limited to the above-mentioned example, Of course, a deformation | transformation and application are possible within the range of the summary of this invention.
[First Modification]
In the weight measurement system 1 according to the first modified example of the present invention, in order to make it difficult to manufacture a counterfeit product, the measurement device 10 is provided with a dummy electrode related to the power reception electrode 19, and the charging device 50 is supplied with power. A dummy electrode related to the electrode 51 is provided. The weight measurement system 1 according to the first modification of the present invention is configured in the same manner as the weight measurement system 1 of each embodiment except that a dummy electrode is provided.
FIG. 14 is a plan view of the measuring apparatus 10 according to the first modification when viewed from the back side. FIG. 15 is a block diagram illustrating components unique to the measurement device 10 and the charging device 50 according to the first modification.
As shown in FIG. 14, the dummy electrode 200 is a member that can be visually recognized as the power receiving electrode 19 or the power feeding electrode 51, but is electrically connected to the charging circuit 21 and the power feeding circuit 53 as shown in FIG. 15. Not. That is, the dummy electrode 200 is a simple metal piece that does not actually function as an electrode.

  As described above, according to the weight measuring system 1 according to the first modification of the present invention, the presence of the dummy electrode 200 makes it visually visible that the power receiving electrode 19 and the power feeding electrode 51 are provided in large numbers. In addition, a manufacturer other than the manufacturer cannot know which electrode actually functions as the power receiving electrode 19 or the power feeding electrode 51. Therefore, even if it is going to manufacture the counterfeit goods which concern on the measuring device 10 which comprises the weight measurement system 1, it cannot be known which power supply electrode 51 should be provided corresponding to the power receiving electrode 19. For this reason, it becomes difficult to manufacture a counterfeit product related to the measurement device 10 according to the first modification. In particular, the charging circuit 21 is formed of an IC chip, wiring is provided between the dummy electrode 200 and the charging circuit 21, the charging electrode 19 and the internal circuit are electrically connected inside the IC chip, and the power feeding circuit 53. Is configured by an IC chip, wiring is provided between the dummy electrode 200 and the power supply circuit 53, and the power supply electrode 51 and the internal circuit are electrically connected inside the IC chip. In this case, since the dummy electrode 200 cannot be determined by destroying the measuring device 10 and the charging device 20 and looking at the internal wiring of each device, it is more difficult to manufacture a counterfeit product.

[Second Modification]
In the weight measurement system 1 according to the second modification of the present invention, in order to make it difficult to manufacture a counterfeit product, the measurement device 10 is provided with three or more power receiving electrodes 19, and the charging device 50 has 3 One or more power supply electrodes 51 are provided. The weight measurement system 1 according to the second modification of the present invention is the weight measurement system 1 of each embodiment except for the configuration related to the power receiving electrode 19 of the measurement device 10 and the configuration related to the power feeding electrode 51 of the charging device 50. It is configured in the same way.
As shown in FIG. 16, the measuring device 10 according to the second modification includes a selection circuit 18 for selectively connecting two power receiving electrodes out of three or more power receiving electrodes 19 to the charging circuit 21. It is a point provided.
As shown in FIG. 17, the charging device 50 according to the second modification is provided with a selection circuit for selectively connecting two power supply electrodes from among three or more power supply electrodes 51 to the power supply circuit 53. This is the point.

The selection circuit 18 provided in the measuring device 10 is connected to the control unit 17 as shown in FIG. 16, and any two power receiving electrodes 19 are selected by the control of the control unit 17 to electrically connect the charging circuit 21. Connect. That is, of the three or more power receiving electrodes 19, the two power receiving electrodes 19 selected by the selection circuit 18 are actually used as electrodes, and the other power receiving electrodes 19 that are not selected are used in this case. Does not function as an electrode.
As shown in FIG. 17, the selection circuit 56 provided in the charging device 50 is connected to the control unit 55, and any two power supply electrodes 51 are selected by the control of the control unit 55 to electrically connect the power supply circuit 53. Connect. That is, of the three or more power supply electrodes 51, the two power supply electrodes 51 selected by the selection circuit 56 are actually used as electrodes, and the other power supply electrodes 51 that are not selected are used in this case. Does not function as an electrode.

Here, the two power receiving electrodes 19 selected by the selection circuit 18 of the measuring device 10 and the two power feeding electrodes 51 selected by the selection circuit 56 of the charging device 50 are measured on the charging device 50 during charging. The electrodes need to be provided at positions where they are in contact with each other when the apparatus 10 is placed. In order to realize this, for example, the following configuration may be adopted.
That is, the same identification number is attached to the power receiving electrode 19 and the power feeding electrode 51 provided at positions where the measuring device 10 is placed on the charging device 50 during charging, and the charging device 51 is provided with the same identification number. The control unit 55 of 50 transmits information indicating the identification number assigned to the power feeding electrode 51 to be selected by the selection circuit 56 to the measuring device 10 by the communication unit 57. The control unit 17 of the measuring apparatus 10 that has received the information indicating the identification number controls the selection circuit 18 so as to select the power receiving electrode 19 corresponding to the identification number.
In addition, when applying this 2nd modification with respect to 3rd Embodiment which performs the authentication process of the measuring device 10, the authentication data used for the said authentication process or the specific authentication data of the electrode which the said apparatus selects An identification number may be included.

  As described above, according to the second modification of the present invention, since three or more power receiving electrodes 19 and three power feeding electrodes 51 are provided, any one of the power receiving electrodes 19 and the power feeding electrodes 51 is actual. Only the manufacturer can know if it is functioning properly. Moreover, even if the measuring device 10 and the charging device 50 are disassembled, it is only known that all the power receiving electrodes 19 and the power feeding electrodes 51 can be used for actual charging in terms of circuit configuration. Therefore, it becomes difficult to manufacture a counterfeit product related to the measurement device 10 included in the weight measurement system 1.

[Third Modification]
The weight measurement system 1 according to the third modified example of the present invention uses a reference in order to reliably prevent charging and calibration in a state where a reference unit (reference weight) is not placed on the placement unit 11. The weight measurement system of each embodiment, except that the battery (reference weight) itself is provided with a secondary battery and a feeding electrode to form a charging device, and the receiving electrode 19 of the measuring device 10 is provided on the mounting portion 11. 1 is configured.
FIG. 18 is a diagram illustrating a schematic configuration of the weight measurement system 1 according to the third modification. As shown in the figure, in the weight measurement system 1 according to the third modification, the charging device 500 itself is configured as a reference weight which is a reference device. In order to perform calibration and charging of the measuring device 10 at the same time, the measuring device 10 and the charging device 500 are configured as follows.
That is, the charging device 500 is provided with a secondary battery 505 for charging the secondary battery 23 of the measuring device 10 and an electrode 501 that is an electrical contact with the measuring device 10 as shown in FIG. Yes. On the other hand, the main difference between the measurement apparatus 10 according to the third modification and the measurement apparatus 10 according to the above-described embodiment is that the power receiving electrode 19 is provided on the mounting portion 11.

Here, the secondary battery 505 provided in the charging device 500 is connected to, for example, a commercial AC power source (AC power source) or the like, and is a charger (not shown) including a circuit that converts commercial AC voltage to AC / DC (AC / DC). ). During the charging, the electrode 501 serves as an electrical contact with a charger (not shown).
Of course, a non-chargeable battery may be used instead of the secondary battery 505. In that case, the charging device 500 is a so-called disposable member. That is, when the charging device 500 runs out of battery, the user purchases a new charging device 500.
As described above, according to the third modification of the present invention, a load corresponding to the reference device weight value is always applied to the weight detection unit 13 when charging using each charging device 500. Therefore, it is possible to prevent charging and calibration from being performed in a state in which the reference unit (reference weight) is not placed on the placement unit 11.

[Fourth Modification]
19 and 20 are schematic side views showing a configuration example of the direction changing mechanism 600 provided in the weight measuring system 1 according to the fourth modification of the present invention. The weight measurement system 1 according to the fourth modified example of the present invention is configured so that the direction d perpendicular to the placement surface of the placement unit 11 of the measurement device 10 and the direction of the gravitational acceleration g are perpendicular to each other. The configuration is the same as that of the weight measurement system 1 of each embodiment except that the direction changing mechanism 600 is provided in order to enable execution of charging and calibration in a state in which is mounted.

  As shown in FIG. 19, the direction changing mechanism 600 includes a reference weight placing portion 603 a, a measuring device pressing portion 603 b, and a rotating member 601. The reference weight placing portion 603a is a member that is pushed down in the direction of the arrow d1 by the weight of the reference weight 101 when the reference weight 101 is placed. One end of the rotating member 601 is connected to the reference weight mounting portion 603a by the rotating shaft 613a, the other end is connected to the measuring device pressing portion 603b by the rotating shaft 613b, and a predetermined position is charged by the fixed shaft 611. It is fixed with respect to the device 50. The measuring device pressing member 603b is provided so as to face the mounting portion 11 of the measuring device 10, and when the rotating member 601 rotates about the fixed shaft 611 in the direction indicated by the arrow d3, the measuring device pressing member 603b is indicated by the arrow d2. Extruded in the direction.

  Here, when the reference weight 101 is placed on the reference weight placing portion 603, the direction changing mechanism 600 transitions from the state shown in FIG. 19 to the state shown in FIG. That is, according to the weight of the reference weight 101 placed on the reference weight placing portion 603, the reference weight placing portion 603 is pushed down in the direction indicated by the arrow d1. By this depression, the rotation member 601 rotates in the direction indicated by the arrow d3 with the fixed shaft 611 as the rotation center. By this rotation, the measurement device pressing portion 603 is pushed out in the direction indicated by the arrow d2. Thus, according to the direction conversion mechanism 600, the direction of the force applied by the weight of the reference weight 101 is converted into a direction perpendicular to that direction.

As described above, according to the fourth modification of the present invention, the measurement d is performed so that the direction d perpendicular to the placement surface of the placement unit 11 of the measurement apparatus 10 and the direction of the gravitational acceleration g are perpendicular to each other. Even when the device 10 is placed, charging and calibration can be performed. In other words, even when the measurement device 10 is in a so-called vertical position, the measurement device 10 can be charged and calibrated.
Note that the configuration of the direction changing mechanism 600 is not limited to the configuration shown in FIGS. 19 and 20, and any known mechanism that realizes a mechanical action that converts the direction in which the force acts into a direction perpendicular to the direction is known. Any mechanism can be applied.

Further, the above-described embodiments include inventions at various stages, and various inventions can be extracted by appropriately combining a plurality of disclosed constituent elements. For example, even if some constituent requirements are deleted from all the constituent requirements shown in the embodiment, the problem described in the column of the problem to be solved by the invention can be solved, and the effect described in the column of the effect of the invention can be achieved. In the case of being obtained, a configuration from which this configuration requirement is deleted can also be extracted as an invention.
In each figure, the size and scale of each part are appropriately different from the actual ones. In addition, each embodiment is a preferred specific example of the present invention, and thus various technically preferable limitations are given. However, the scope of the present invention is not particularly limited to the description that the present invention is limited. However, it is not limited to these forms.

DESCRIPTION OF SYMBOLS 1 ... Weight measuring system, 10 ... Measuring apparatus, 101, 101a, 101b ... Reference | standard weight, 11 ... Mounting part, 13 ... Weight detection part, 15 ... A / D conversion circuit, 17 ... Control part, 17-1 ... Calculation Processing unit, 17-2 ... Charge processing unit, 17-3 ... Calibration processing unit, 18 ... Selection circuit, 19 ... Receiving electrode, 200 ... Dummy electrode, 201 ... Pressing member, 203 ... Drive mechanism, 21 ... Charging circuit, 23 ... secondary battery, 25 ... storage unit, 27 ... communication unit, 29 ... display unit, 31 ... operation unit, 31-1 ... power switch, 31-2 ... calculation switch, 31-3 ... mode setting switch, 41 ... temperature Sensor, 42, 72 ... RFID chip, 43 ... A / D conversion circuit, 45 ... Humidity sensor, 47 ... A / D conversion circuit, 59 ... Reference sensor, 50, 500 ... Charging device, 501 ... Electrode, 505 ... Two Secondary battery, 51 ... feed electrode, 53 ... supply Circuit 55 ... Control part 56 ... Selection circuit 57 ... Communication part 59 ... Reference device detection sensor 61 ... Temperature sensor 63 ... A / D conversion circuit 65 ... Humidity sensor 67 ... A / D conversion circuit 70a, 70b ... reference device accommodating portion, 72 ... RFID chip, 600 ... direction changing mechanism, 603a ... reference weight mounting portion, 603b ... measuring device pressing portion 603b, 601 ... rotating member, 611 ... fixed shaft, 613a, 613b ... rotation axis.

Claims (6)

A measuring device having a secondary battery charged by a charging device as one of power sources,
A charging circuit for charging the secondary battery with electric power supplied from the charging device;
A placement section on which the object to be measured is placed;
A weight detection unit for detecting the weight of the object to be measured placed on the placement unit;
A reference unit weight value storage unit for storing a reference unit weight value for calibrating the weight detection unit;
When the measuring device is connected to the charging device and the charging circuit charges the secondary battery, the detected value of the reference weight detected by the weight detecting unit is the reference device weight value. A correction data generation unit that generates correction data for correcting the detected value of the measurement object detected by the weight detection unit,
A correction data storage unit for storing the correction data;
A measuring device comprising: The charging device includes: a first sensor that detects at least one of temperature and humidity; and a sensor value transmission unit that transmits an output value of the first sensor to the measurement device during the charging. Prepared,
The measuring device is
A second sensor for detecting a detection target similar to the detection target of the first sensor;
A sensor value receiving unit that receives the output value of the first sensor transmitted by the sensor value transmitting unit;
The correction data generation unit generates the correction data, calibrates the second sensor based on the output value of the first sensor and the output value of the second sensor, and Sensor value correction data for correcting the output value of the sensor of
The correction data storage unit stores the correction data and the sensor value correction data.
The measuring apparatus according to claim 1. Including an authentication data transmitting unit that generates and transmits authentication data to be used for authentication processing of the measurement device by the charging device based on an identifier unique to the measurement device;
The measuring apparatus according to claim 1 or 2, wherein The charging device includes a power supply circuit for supplying power to the secondary battery, a pair of power supply electrodes electrically connected to the power supply circuit, and a dummy power supply electrode related to the power supply electrode,
The measuring device is
A pair of power receiving electrodes provided in contact with the power feeding electrode during the charging;
A dummy power receiving electrode provided in contact with the dummy power feeding electrode during the charging;
A charging circuit that electrically connects the power receiving electrode and the secondary battery;
The measuring device according to any one of claims 1 to 3, further comprising: Weight measurement comprising: a secondary battery as one of the power sources, and a measuring device including a charging circuit that charges the secondary battery; and a charging device that supplies power to the secondary battery to charge the secondary battery. A system,
The measuring device is
A placement section on which the object to be measured is placed;
A weight detection unit for detecting the weight of the object to be measured placed on the placement unit;
A reference unit weight value storage unit for storing a reference unit weight value for calibrating the weight detection unit;
When the measuring device is connected to the charging device and the charging circuit charges the secondary battery, the detected value of the reference weight detected by the weight detecting unit is the reference device weight value. A correction data generation unit that generates correction data for correcting the detected value of the measurement object detected by the weight detection unit,
A correction data storage unit for storing the correction data,
The charging device is:
A load portion that applies a load corresponding to the reference unit weight value to the placement portion when performing the charging;
And a power supply circuit for supplying power to the secondary battery. The measuring device is
An authentication data transmitting unit that generates and transmits authentication data to be used for authentication processing of the measurement device by the charging device based on an identifier unique to the measurement device;
The charging device is:
An authentication data receiving unit for receiving the authentication data transmitted by the measuring device;
An authentication determination unit for determining whether or not the authentication data is appropriate authentication data;
A control unit that causes the power supply circuit to start supplying power to the secondary battery when the authentication determination unit determines that the authentication data is appropriate authentication data,
The weight measuring system according to claim 5.

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