JP4219723B2 - Measuring device and measuring system - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention includes a first measurement unit that is disposed in the apparatus main body and that measures the parameters of the measurement object to obtain measurement data, and is disposed in the apparatus main body and transmits the measurement data via the communication unit. In addition, a measurement device including a control unit configured to be output to an external device, a second measurement unit that measures internal environment parameters of the device main body and obtains internal environment data, and measurement including the measurement device It is about the system.
[0002]
[Prior art]
As this type of measuring device, a measuring device (digital pressure gauge) disclosed in Japanese Patent Application Laid-Open No. 2000-266623 is known. As shown in FIGS. 1 and 2 in the publication, the digital manometer (1), which is a digital pressure gauge, is a pressure amplified by a pressure sensor (10) and an amplifier (11) connected to a pressure guiding tube (5). An A / D converter (12) that converts an electrical signal from the sensor (10) into digital data and outputs it as a pressure measurement value (measurement data), two thermocouples (8, 18), and these thermocouples ( 8, 18) which selectively supplies the electric signal from the amplifier (15) to the amplifier (15), the thermocouple (8, 18) selected by the switching circuit (17) and amplified by the amplifier (15) ) Is converted into digital data, so that when the electrical signal from the thermocouple (8) is selected, the gas temperature is output and the electrical signal from the thermocouple (18) is Selected The A / D converter (16) that outputs the internal temperature (internal environment data) of the device body (2), and the temperature difference between the gas temperature and the internal temperature input from the A / D converter (16). By calculating and determining whether this temperature difference is within a predetermined range, the effectiveness (reliability) for the input pressure measurement value is determined, and the determination result is obtained from the A / D converter (12). And a microcomputer (13) for displaying the input pressure measurement value on the display unit (3).
[0003]
In this digital manometer (1), the temperature difference between the internal temperature inside the apparatus main body (2) and the gas temperature as a parameter for the measurement object is detected, and the detected temperature difference is less affected by the preset temperature. Only when it is within the range, the fact that the pressure measurement value is valid (a reliable value) is displayed on the display unit (3). Therefore, only when the pressure measurement value is valid, the pressure measurement value is used to determine leakage or the like, and thus based on the pressure measurement value measured when the internal temperature of the digital manometer (1) is changing. False detection can be avoided.
[0004]
[Patent Document 1]
JP 2000-266623 A (page 3-4, FIG. 1-2)
[0005]
[Problems to be solved by the invention]
However, the conventional measuring apparatus has the following problems to be solved. That is, in this measuring device (digital manometer (1)), is the temperature difference between the internal temperature (internal environment data) of the device main body (2) and the gas temperature of the gas as a parameter within a preset temperature range? The validity (reliability) of the pressure measurement value (measurement data) is determined based on whether or not (that is, whether or not the temperature difference between the internal temperature and the gas temperature is small). However, even when the temperature difference between the internal temperature and the gas temperature is small, when the internal temperature of the apparatus main body (2) is abnormally high, or conversely, when the internal temperature is abnormally low, Due to the fact that the electronic components such as the pressure sensor (10), the amplifier (11) and the A / D (12) are operated out of their respective guaranteed temperature ranges, the digital manometer (1) There is a possibility that the measured value cannot be measured accurately. Therefore, there is a problem to be solved that the effectiveness (reliability) of the pressure measurement value cannot be accurately determined only by the temperature difference between the internal temperature of the apparatus main body (2) and the gas temperature.
[0006]
The present invention has been made to solve such a problem, and has as its main object to provide a measuring apparatus and a measuring system that can accurately determine the degree of reliability of measurement data.
[0007]
[Means for Solving the Problems]
In order to achieve the above object, a measuring apparatus according to claim 1 is disposed in the apparatus main body, measures a parameter of the measurement object, and obtains measurement data, and in the apparatus main body. A control unit arranged to input the measurement data and output the measurement data to an external device via a communication unit; and an internal environment of the device main body provided in the device main body A second measurement unit that measures parameters and obtains internal environment data, and the control unit compares the internal environment data with preset determination data to determine a rank of measurement accuracy for the measurement data. In addition to specifying, the measurement accuracy data indicating the specified rank can be output together with the measurement data to the external device.
[0008]
The measurement system according to claim 2 is configured to be separated from the measurement device according to claim 1 and to be communicable with the measurement device via a transmission path. A data collection device for collecting the measurement accuracy data output by the measurement device and the measurement data;
[0009]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, preferred embodiments of a measurement device and a measurement system according to the present invention will be described with reference to the accompanying drawings.
[0010]
First, the configuration of the measurement apparatus 1 and the measurement system MS of the present invention will be described with reference to the drawings.
[0011]
As illustrated in FIG. 1, the measurement system MS includes two measurement devices 1 a and 1 b (also referred to as “measurement device 1” unless otherwise specified) and a management device 2. In this case, the measuring apparatus 1 is connected to the management apparatus 2 via corresponding transmission paths 3a and 3b (also referred to as “transmission path 3” unless otherwise specified). Note that the measurement system MS may be configured by including one or three or more measurement devices 1. Each transmission path 3 can be configured with a wired transmission path or a wireless transmission path.
[0012]
Next, each structure of the measuring device 1 and the management device 2 will be specifically described.
[0013]
As shown in FIG. 1, the measurement device 1 includes a device main body 11 and a sensor (first sensor) 12, and includes a measurement unit (first measurement unit) 13 and a sensor (second sensor) 14 in the device main body 11. A measurement unit (second measurement unit) 15, a control unit 16, and a communication unit 17, and measurement data D 1 indicating parameters such as temperature and humidity and current of a measurement object (not shown) is measured using the sensor 12. Thus, it can be transmitted to an external device (management device 2).
[0014]
The sensor 12 is attached to, for example, a measurement object (not shown) disposed outside the apparatus main body 11, and outputs a detection signal S1 as an analog signal that changes according to a parameter value for the measurement object. . In this case, as the sensor 12, a sensor that matches a desired parameter is selected from various sensors and used. For example, a pressure sensor is used when the parameter is pressure, a temperature sensor is used when the parameter is temperature, and a humidity sensor is used when the parameter is humidity. When the parameter is current, a current sensor is used. When the parameter is vibration, a vibration sensor is used. When the parameter is acceleration, an acceleration sensor is used.
[0015]
The measurement unit 13 includes an amplifier 21 and an analog / digital converter (hereinafter also referred to as an “A / D converter”) 22, and acquires (generates) measurement data D <b> 1 by measuring parameters based on the input detection signal S <b> 1. ) Specifically, the amplifier 21 amplifies the input detection signal S1 to a level that matches the input specifications of the A / D converter 22. On the other hand, the A / D converter 22 receives the signal S2 amplified by the amplifier 21, converts it into measurement data D1, which is digital data, and outputs it.
[0016]
The sensor 14 outputs a detection signal S3 as an analog signal that changes in accordance with a parameter value for the internal environment in the apparatus main body 11. In this case, in the same manner as the sensor 12, a sensor that matches a desired parameter for the internal environment in the apparatus main body 11 is selected and used from among the various sensors. In the present embodiment, as an example, a temperature sensor is used as the sensor 14 in order to set the internal environment parameter of the apparatus main body 11 to be measured as the internal temperature. In this case, a contact-type temperature sensor such as a thermistor or a thermocouple can be used as the temperature sensor, or a non-contact type temperature sensor such as a radiation thermometer can be used.
[0017]
The measurement unit 15 includes an amplifier 23 and an A / D converter 24 in the same manner as the measurement unit 13, and measures internal environment parameters of the apparatus main body 11 based on the input detection signal S3 to obtain internal environment data D2. (Generate). Specifically, the amplifier 23 amplifies the input detection signal S3 to a level that matches the input specifications of the A / D converter 24. On the other hand, the A / D converter 24 receives the signal S4 amplified by the amplifier 23, converts it into internal environment data D2 which is digital data, and outputs it. In this case, as described above, since the sensor 14 is a temperature sensor in the present embodiment, the detection signal S3 detected by the sensor 14 is converted into the internal environment data D2 indicating the internal temperature.
[0018]
The control unit 16 includes, for example, a CPU and a memory (both not shown). In this case, the memory stores in advance an operation program that defines the operation of the CPU and data for specifying measurement accuracy as the degree of reliability (validity) of the measurement data D1 based on the internal environment data D2. ing. Here, the measurement accuracy of the measurement data D1 is determined according to the measurement accuracy of the measurement device 1, and the measurement accuracy of the measurement device 1 is the internal temperature of the device body 11, that is, the amplifier 21 and the A / D converter. It is determined according to the accuracy with respect to the operating temperature of an electronic component such as 22. Therefore, as data for specifying the measurement accuracy of the measurement data D1, in the memory, as shown in FIG. 2, determination data Dj that is data indicating a temperature range for ranking the accuracy of the internal environment data D2 is used. And measurement accuracy data Dr indicating the measurement accuracy of the measurement apparatus 1 corresponding to each temperature range (each rank) indicated by the determination data Dj are stored in advance in the memory in association with each other. In this case, the determination data Dj is a range of less than −10 ° C., a range of −10 ° C. or more and less than 0 ° C., a range of 0 ° C. or more and less than 18 ° C., a range of 18 ° C. or more and 28 ° C. or less, Each upper and lower limit value for ranking into the following range, the range exceeding 40 ° C. and the range exceeding 50 ° C., and the range exceeding 50 ° C. The measurement accuracy data Dr includes rank A indicating the basic specifications (for example, ± 0.05% rdg (reading value) ± 0.1 ° C.) of the measuring apparatus 1, and rank for adding 0.2% rdg to the basic specifications. B, rank C that adds 0.5% rdg to the basic specification, and data indicating rank D that does not guarantee the measurement accuracy. On the other hand, the CPU inputs measurement data D1 and internal environment data D2 periodically, and compares measurement data D1 with measurement data D1 (reliability) by comparing internal environment data D2 and determination data Dj. To do. Further, the CPU periodically outputs the measurement accuracy data Dr as the identification result and the measurement data D1 to the communication unit 17 together with the time stamp Dt. The communication unit 17 transmits the input measurement data D1, measurement accuracy data Dr, and time stamp Dt to the management apparatus 2 via the transmission path 3.
[0019]
On the other hand, the management device 2 corresponds to the data collection device in the present invention, and is constituted by, for example, a personal computer, and the measurement data D1 and the measurement accuracy data Dr sent from each measurement device 1 via the transmission path 3. The time stamp Dt is collected and stored in a storage device (not shown), and each data is managed. Further, the management device 2 displays the measurement data D1, the measurement accuracy data Dr, and the time stamp Dt stored in the storage device on a display device (not shown) such as a monitor in accordance with the operation of the administrator.
[0020]
Next, the overall operation in the measurement system MS will be described with reference to the drawings.
[0021]
In this measurement system MS, each measurement device 1 periodically measures parameters for each corresponding measurement object, and periodically outputs measurement data D1, measurement accuracy data Dr, and time stamp Dt to the management device 2. To do. In this case, when the internal environment data D2 changes as time passes, for example, as shown in FIG. 3, the control unit 16 determines that the internal temperature of the measuring device 1 indicated by each internal environment data D2 is any of ranks A to D. And the measurement accuracy data Dr corresponding to the rank is specified. Next, in the periods T1 to T2, the periods T3 to T4, and the periods T7 to T8, the control unit 16 outputs the measurement data D1, the measurement accuracy data Dr indicating the specified rank B, and the time stamp Dt, and the period T2 After T3 and time T8, measurement data D1, measurement accuracy data Dr indicating the specified rank A, and time stamp Dt are output. Further, in the periods T4 to T5 and the periods T6 to T7, the measurement data D1, the measurement accuracy data Dr indicating the specified rank C, and the time stamp Dt are output. In the periods T5 to T6, the measurement data D1 is specified. Measurement accuracy data Dr indicating rank D and time stamp Dt are output.
[0022]
On the other hand, the management device 2 receives and collects the measurement data D1, the measurement accuracy data Dr, and the time stamp Dt sent from each measurement device 1 via the transmission path 3, and stores them in the storage device. Therefore, the administrator can collect and manage the measurement data D1, the measurement accuracy data Dr, and the time stamp Dt for each measurement object or each parameter using the measurement system MS. The administrator operates the management device 2 to display the measurement data D1, the measurement accuracy data Dr, and the time stamp Dt stored in the storage device on the display device, thereby measuring the measurement data based on the measurement accuracy data Dr. The parameter about each measurement object can be managed while grasping the reliability with respect to D1.
[0023]
Thus, according to the measurement device 1 and the measurement system MS, the control unit 16 in each measurement device 1 determines the degree of reliability of the measurement data D1 determined based on the measurement data D1 and the internal environment data D2. By transmitting the measured measurement accuracy data Dr to the management device 2, the administrator operates the management device 2 to display the measurement data D1 and the measurement accuracy data Dr stored in the storage device on the display device, for example. Thus, the measurement accuracy as the degree of reliability with respect to the measurement data D1 can be grasped reliably, easily and accurately. Therefore, the administrator can monitor and manage each measurement data D1 in consideration of measurement accuracy. Furthermore, since the administrator can also grasp the internal environment of each measuring device 1 based on the measurement accuracy data Dr, it is necessary to grasp the environmental conditions (weather, ambient temperature, etc.) in which the measuring device 1 is installed. In addition, when the measurement accuracy data Dr transmitted from the measuring device 1 is deteriorated, the necessity of maintenance for the measuring device 1 can be determined. Therefore, the transition to the abnormal state (failure state) of the measuring device 1 can be prevented in advance. In this case, it is also possible to employ a configuration in which the measurement device 1 transmits the measured internal environment data D2 itself to the management device 2 together with the measurement data D1. However, each measurement device 1 itself transmits the measurement accuracy data Dr specified by comparing the internal environment data D2 and the determination data Dj to the management device 2 as in the measurement system MS. Unlike the configuration in which the measurement device 1 simply transmits the internal environment data D2 to the management device 2, it is possible to eliminate the need for determination on the measurement accuracy for the measurement data D1 on the administrator side. As a result, the administrator can immediately grasp the degree of reliability of the measurement data D1 and the internal environment of the measurement device 1 based on the measurement accuracy data Dr.
[0024]
The present invention is not limited to the embodiment described above. For example, in this embodiment, an example in which a temperature sensor is used as the sensor 14 of the measuring device 1 has been described, but instead of the temperature sensor, a humidity sensor, an atmospheric pressure sensor, a vibration sensor, an acceleration sensor, or the like is used. A configuration in which measurement accuracy data Dr indicating the degree of reliability (validity) of the measurement data D1 based on the internal environment data D2 of the apparatus main body 11 measured by these sensors can also be adopted. Furthermore, in the above-described embodiment, an example in which one sensor 14 is disposed in the apparatus main body 11 has been described. However, different internal environments of the apparatus main body 11 are measured by disposing a plurality of different types of sensors. In addition, it is possible to adopt a configuration in which measurement accuracy data Dr indicating the degree of reliability (effectiveness) of the measurement data D1 is specified based on a plurality of internal environment data D2 obtained by measurement. According to this configuration, the measurement accuracy data Dr for the measurement data D1 can be specified with higher accuracy. In addition, when the parameters of the measurement object measured by each measuring device 1 are different, a sensor 12 of a type that matches each measuring device 1 can be used.
[0025]
【The invention's effect】
As described above, according to the measurement device and the measurement system according to the present invention, the control unit of each measurement device compares the measured internal environment data with preset determination data, thereby improving the reliability of the measurement data. By specifying the degree and sending the measurement accuracy data together with the measurement data , the administrator can reliably and easily grasp the degree of reliability of the measurement data based on the received measurement accuracy data. it can. Therefore, the administrator can monitor and manage each measurement data while considering the degree of reliability of the measurement data. Furthermore, the administrator can grasp the internal environment of each measurement device based on the degree of reliability of the measurement data, so the environment state (weather, ambient temperature, etc.) where the measurement device is installed is grasped. In addition, when the degree of reliability of the measurement data transmitted from the measuring device is deteriorated, the necessity of maintenance for the measuring device can be determined. Therefore, it is possible to prevent the measurement apparatus from shifting to an abnormal state (failure state). In this case, the measurement accuracy data indicating the rank of the measurement accuracy is output to the external device, which is different from the configuration in which the measurement device simply outputs the internal environment data to the external device. Judgment about accuracy can be made unnecessary. As a result, the administrator can immediately grasp the degree of reliability of the measurement data and the internal environment of the measurement apparatus based on the measurement accuracy data.
[Brief description of the drawings]
FIG. 1 is a block diagram showing a configuration of a measurement system MS.
FIG. 2 is a correspondence diagram showing a correspondence relationship between determination data Dj and measurement accuracy data Dr stored in a memory provided in a control unit 16 of the measurement apparatus 1;
FIG. 3 is an explanatory diagram showing the relationship between the passage of time and the ranks A to D for explaining the operation of the measuring apparatus 1;
[Explanation of symbols]
1a, 1b Measuring device 2 Management device 3a, 3b Transmission path 11 Device body 12, 14 Sensor 13, 15 Measuring unit 16 Control unit 17 Communication unit D1 Measurement data D2 Internal environment data Dj Determination data Dr Measurement accuracy data

Claims (2)

A first measurement unit that is disposed in the apparatus main body and that acquires measurement data by measuring parameters of the measurement object, and is provided in the apparatus main body to input the measurement data and to store the measurement data. A control unit configured to be able to output to an external device via a communication unit, and a second measurement unit that is disposed in the device main body and measures internal environment parameters of the device main body to acquire internal environment data And
The control unit specifies the rank of measurement accuracy for the measurement data by comparing the internal environment data and preset determination data, and the measurement accuracy data indicating the specified rank together with the measurement data. A measuring device that can be output to an external device. The measurement accuracy of the measurement device according to claim 1, arranged to be separated from the measurement device and configured to be communicable with the measurement device via a transmission path and output by the measurement device. A measurement system comprising data and a data collection device for collecting the measurement data.

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