JP2006329845A - Measuring device and system thereof - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To easily understand measurement accuracy in an entire measurement system in a measurement device capable of easily understanding the measurement accuracy of the device and a measurement system with a plurality of the devices connected via a network, even if complex measurement accuracy is not operated by an operator himself. <P>SOLUTION: The measurement device includes a measuring means for measuring measurement data inputted from an object to be tested or outputting a measurement signal to the object, and a displaying means for displaying the measurement data or the output signal. In the device, a storing means for storing the measurement accuracy of the data is provided, and measurement accuracy information is calculated from the measurement accuracy, measurement requirements, and measurement data to display the information on the displaying means. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention provides a measuring device that allows the measuring device operator to easily grasp the measuring accuracy of the measuring device without calculating complicated measuring accuracy, and such a measuring device via a network. The present invention relates to a measurement system that can easily grasp the measurement accuracy of the entire measurement system in a measurement system connected to a plurality of devices.

The measurement accuracy of the measuring device varies depending on the frequency and voltage to be measured. For example, in the case of a high-frequency measurement device such as a spectrum analyzer, there are amplitude accuracy depending on the frequency to be measured and the measured signal level, and frequency accuracy depending on the frequency. As a prior art document of a measuring apparatus in consideration of such measurement accuracy, there is one such as Patent Document 1.

Japanese Patent Laid-Open No. 2001-311753

  FIG. 6 shows a configuration example of a conventional measuring apparatus. In FIG. 6, a test target (DUT) 1 is a device to be tested. The measuring device 10 is a measuring device such as a spectrum analyzer or a power meter. The measuring means 11 measures the measurement data input from the test object 1. The storage unit 12 stores the measurement data measured by the measurement unit 11. The display unit 13 displays the measurement data stored in the storage unit 12.

  The display method is to display the waveform of the measured data in the case of a measuring device with a graphic such as a spectrum analyzer, and in the case of a measuring device that displays only the numerical value of the measured data, such as a power meter, Is displayed.

  However, the conventional measuring apparatus has the following problems. In other words, to check the measurement accuracy, it is necessary to look at the instruction manual of the measuring device. However, since the contents of this instruction manual are complicated, the operator of the measuring device may mistake the measurement accuracy of the instruction manual. There is. For this reason, there are cases where measurement is performed even though the measurement range is not set to the measurement accuracy required for measurement of the measurement data.

  Furthermore, when measuring with multiple measuring devices connected, it is necessary to calculate the measurement accuracy of the entire measuring system taking into account the accuracy error of each measuring device. You may make a mistake. For this reason, the measurement which ignores measurement accuracy may be performed.

  The present invention has been made in view of these problems, and allows the measurement device operator to easily grasp the measurement accuracy of the measurement device without calculating complicated measurement accuracy. It is an object of the present invention to provide a measurement system capable of easily grasping the measurement accuracy of the entire measurement system in a measurement system in which a plurality of such measurement apparatuses are connected via a network.

In order to achieve such a problem, the invention described in claim 1
In a measurement apparatus comprising measurement means for measuring measurement data input from a test object, or a measurement means for outputting a measurement signal to the test object and a display means for displaying the measurement data or the output signal,
Storage means for storing the measurement accuracy of the measurement data,
Measurement accuracy information is calculated from the measurement accuracy, measurement conditions, and measurement data, and the measurement accuracy information is displayed on the display means.

The invention according to claim 2 is a measurement comprising measurement means for measuring measurement data input from a test object or outputting a measurement signal to the test object and display means for displaying the measurement data or the output signal. In the device
Storage means for storing the measurement accuracy of the measurement data together with the measurement data;
Measurement condition setting means for setting measurement conditions of the measurement means;
Measurement conditions set by the measurement condition setting means, measurement accuracy stored in the storage means, and accuracy calculation means for calculating measurement accuracy information from measurement data;
Display control means for controlling an operation of displaying the measurement accuracy information on the display means.

  According to a third aspect of the present invention, in the measurement apparatus according to the first or second aspect, the display control means switches between the measurement data and the measurement accuracy information and displays them on the display means.

  According to a fourth aspect of the present invention, in the measurement apparatus according to the first or second aspect, the display control means displays the measurement accuracy information together with the measurement data on the display means.

In the invention according to claim 5, the storage means stores a calibration date and a recommended calibration cycle,
Calibration expiration date determining means for determining whether the calibration date is within the range of the calibration expiration date from the calibration date and the recommended calibration cycle.

  According to a sixth aspect of the present invention, the measurement apparatus according to any one of the first to fifth aspects and an external control apparatus are connected via a network, and the external control apparatus transmits the measurement accuracy transmitted from these measurement apparatuses. Second display means for displaying information is provided.

According to a seventh aspect of the invention, the plurality of measuring devices according to any one of the first to fifth aspects and an external control device are connected via a network,
The external control device includes a total accuracy calculation device that calculates measurement accuracy of the entire measurement system based on the measurement accuracy information transmitted from the plurality of measurement devices according to claims 1 to 5, and measurement of the entire measurement system. Second display means for displaying the accuracy is provided.

The present invention has the following effects.
Measurement accuracy information is calculated from the measurement accuracy, measurement conditions, and measurement data, and this measurement accuracy information is displayed on the display means, so that the measurement device can be operated without the operator having to perform complicated measurement accuracy calculations. The measurement accuracy can be easily grasped.

  In addition, since the measurement data and the measurement accuracy information are switched and displayed, the measurement accuracy can be easily grasped even in a measurement device such as a power meter without a graphic.

  In addition, since the measurement accuracy information is displayed together with the measurement data, in the case of a measurement apparatus such as a spectrum analyzer with a graphic, it is possible to immediately grasp how much error the measurement data includes.

  Furthermore, since the total accuracy calculation device that calculates the measurement accuracy of the entire measurement system based on the measurement accuracy information transmitted from the plurality of measurement devices is provided, the measurement accuracy of the entire measurement system can be easily grasped.

  Hereinafter, a configuration example of the measurement apparatus of the present invention will be described with reference to FIG. The measuring apparatus 100 is a measuring apparatus such as a spectrum analyzer or a power meter, for example. The measuring unit 110 measures the measurement data input from the test object 200.

  In the storage means 120, a measurement data file 121 for storing measurement data is formed, and in addition to storing the measurement data, a measurement accuracy file 122 in which the measurement accuracy of the measuring instrument is stored is formed. When the measuring device 100 is provided with a calibration deadline warning function, the storage unit 320 stores the calibration date and time (the actual calibration date) and the recommended calibration cycle (to maintain the measurement performance of the measuring device 100). (Required calibration period).

  The measurement condition setting unit 130 sets various measurement conditions such as a frequency range and a voltage range for the measurement unit 110 and outputs the measurement conditions to an accuracy calculation unit 140 described later. The accuracy calculation means 140 calculates measurement accuracy information based on measurement conditions, measurement data, and measurement accuracy.

  In addition to the measurement data, measurement accuracy information is also input to the display control unit 150, and the measurement accuracy information is displayed on the display unit 160 according to the type of the measurement apparatus 100 as described in the operation of FIG.

  Next, the operation of FIG. 1 will be described with reference to the flowchart of FIG. The measurement condition setting unit 130 sets various measurement conditions such as a frequency range and a voltage range for the measurement unit 110, and outputs the measurement condition to the accuracy calculation unit 140 (step A1).

  The measurement data output from the test object 200 is measured by the measurement unit 110 (step A2). This measurement data is output to the storage means 120 and stored in the measurement data file 121 formed in the storage means 120 (step A3).

  The measurement accuracy calculation means 140 calculates measurement accuracy information based on the measurement conditions, the measurement data, and the measurement accuracy stored in the measurement accuracy file 122 (step A4). A detailed calculation method will be described later with reference to FIG. It shall be done in Then, the measurement accuracy information calculated in this way is output to the display control means 150.

  The display unit 160 displays measurement data and measurement accuracy information as described below under the control of the display control unit 150 (step A5). When the measuring device 100 has a calibration expiration warning function, the calibration expiration date determination unit 180 is within the range of the calibration expiration date from the calibration date and time stored in the storage unit 320 and the recommended calibration cycle. And the determination result is displayed on the display means 160 via the display control means 150.

  A specific example of the display method of measurement data and measurement accuracy information is shown in FIG. 3 when the measurement apparatus 100 is a spectrum analyzer, for example.

Here, FIG. 3 shows the measurement condition setting means 130 in step A1,
Frequency range 100kHz to 4GHz
Reference level 0 dBm
Input attenuation 10 dB
The measurement conditions of

The content of the measurement accuracy file 121 stored in the storage means 120 has a frequency of 100 kHz to 1 GHz. Measurement accuracy ± 0.5 dB (when the input ATT is 10 dB, the input level is -80 dBm or more)
Frequency 100 kHz to 1 GHz Measurement accuracy ± 0.8 dB (when input ATT is 10 dB, input level is -80 dBm or less)
Frequency 1GHz to 4GHz Measurement accuracy ± 0.9dB (When input ATT is 10dB, input level is -80dBm or more)
Frequency 1 GHz to 4 GHz Measurement accuracy ± 1.0 dB (when input ATT is 10 dB, input level is -80 dBm or less)
It is an example in the case of.

  In FIG. 3, the markers 510 and 520 are displayed together with the measurement data, and the measurement accuracy of the markers 510 and 520 is displayed in the measurement accuracy display area 530. In FIG. 3, the accuracy is displayed when the markers 510 and 520 are displayed. However, the accuracy may be displayed as a line in the spectrum graphic.

  Furthermore, as a second display method, the area boundary lines 540 and 541 may be drawn as shown in FIG. 4 to display the measurement accuracy information 550 to 553 for each area. Here, as is apparent from FIG. 4, the measurement accuracy information 550 to 553 obtained in step A4 differs depending on the measurement range (measurement conditions), the frequency of the measurement data, and the input level of the measurement data.

  In FIG. 4, the measurement accuracy under the conditions of a frequency of 100 kHz to 1 GHz and an input level of −80 dBm or more is the best, and the measurement accuracy information (error) is ± 0.5 dB. Note that the measurement accuracy information is different even at the same frequency with an input level of −80 dBm as a boundary (that is, the measurement accuracy information 553 is ± 0.5 dB while the measurement accuracy information 552 is ± 0.8 dB). This is because when the level is -80 dBm or less, it is strongly influenced by noise and the error becomes large. Therefore, the measurement accuracy file 121 stores the measurement accuracy based on these influences.

  In the embodiment of FIG. 4, the spectrum analyzer has been described as an example. Therefore, the content of the measurement accuracy file 121 is determined on the condition of the input level of the measurement data, but the measurement does not need to consider the influence of the error due to the input level. In the case of a measuring instrument, it goes without saying that the content of the measurement accuracy file 121 is determined without considering the input level.

  Note that the display of the measurement accuracy information 550 to 553 in FIG. 4 can be turned on / off by the display control means. Further, although the present embodiment has been described using a spectrum analyzer, the present invention is not limited to this measuring apparatus, and can be applied to all other measuring apparatuses.

  In this way, the measurement accuracy information is calculated from the measurement accuracy, measurement conditions, and measurement data, and this measurement accuracy information is displayed on the display means 160. Therefore, the operator of the measurement apparatus 100 does not calculate complicated measurement accuracy. However, the measurement accuracy can be easily grasped.

  Next, the configuration of the measurement system using the measurement apparatus 100 described in the first embodiment will be described with reference to FIG. 5, but the same components as those in FIG. .

  In the measurement system of FIG. 5, the measurement device 100 and the measurement device 300 are connected to an external control device 400 via a network. In addition to the configuration described in FIG. 1, the measurement apparatus 100 is provided with a communication unit 170 that communicates measurement accuracy information with the communication unit 410 of the external control device 400 via a network.

  The measuring apparatus 300 is a signal generator in this embodiment. The measuring means 310 outputs a measurement signal to the test object 200. The storage unit 320 is formed with an accuracy file 322 in which accuracy information of the measurement signal generated by the signal generator (that is, a signal indicating how much error is included in the measurement signal) is stored.

  The measurement signal setting unit 330 sets, for example, the frequency and power of the measurement signal with respect to the measurement unit 310 and outputs the measurement signal condition to an accuracy calculation unit 340 described later. The accuracy calculation means 340 calculates accuracy information of the measurement signal based on the measurement signal condition and the accuracy data output from the accuracy file 322.

  Since the display control unit 350 and the display unit 360 correspond to the display control unit 150 and the display unit 160, respectively, the measurement accuracy information may be displayed on the display unit 360 in the same manner as in FIG. Then, since the measurement accuracy of the entire measurement system is displayed on the display means 430 of the external control device 400 described later, these configurations may be omitted.

  The communication unit 370 outputs the accuracy information of the measurement signal calculated by the accuracy calculation unit 340 to the communication unit 410 of the external control device 400 via the network.

  The external control device 400 is a personal computer, for example. The communication unit 410 receives measurement accuracy information from the communication unit 170 via a network, and receives measurement signal accuracy information from the communication unit 370. The total accuracy calculation device 420 calculates the measurement accuracy of the entire measurement system from the accuracy information and measurement accuracy information of the measurement signal.

  Next, the operation of FIG. 5 will be described. However, in the measurement apparatus 100 of FIG. 5, the same reference numerals as those in FIG. 1 operate in the same manner as in FIG. 1, and each configuration of the measurement apparatus 300 is also given the same name as the configuration of the measurement apparatus 100. Since the same operation is performed with respect to the configuration, the description of the operation of these configurations is omitted. Therefore, the description of the operation of FIG. 5 only describes the operation in which the total accuracy calculation device 420 calculates the measurement accuracy of the entire measurement system based on the measurement accuracy information output from each measurement device 100, 300 and the accuracy information of the measurement signal. To do.

  The total accuracy calculation means 420 to which the accuracy information of the measurement signal and the measurement accuracy information are input from the communication means 410 calculates the measurement accuracy of the entire measurement system as follows. For example, when the error of the accuracy information of the measurement signal of the measurement device 300 that is a signal generator is 1 dB and the measurement accuracy information of the measurement device 100 that is a receiver is 1 dB, these errors are superimposed and integrated. The accuracy calculation means 420 calculates the measurement accuracy of the entire measurement system as 2 dB. The display unit 430 displays the measurement accuracy of the entire measurement system output from the total accuracy calculation device 420.

  As described above, since the overall accuracy calculation device for calculating the measurement accuracy of the entire measurement system based on the measurement accuracy information (measurement signal accuracy information) transmitted from the plurality of measurement devices 100 and 300 is provided, Measurement accuracy can be easily grasped.

  As a result, it is a measure against measuring data with more digits than significant digits. Furthermore, it is possible to immediately determine how much error the measurement value includes.

It is an example of composition of measuring device 100 by the present invention. It is a flowchart explaining the operation | movement of FIG. It is an example of a display of the measurement accuracy information in the markers 510 and 520. It is the figure which showed the measurement accuracy information by dividing with an area boundary line. 1 is a configuration example of a measurement system using a measurement device 100. It is an example of composition of conventional measuring device 10.

Explanation of symbols

DESCRIPTION OF SYMBOLS 100 Measuring apparatus 110 Measuring means 120 Memory | storage means 130 Measurement condition setting means 140 Accuracy calculation means 150 Display control means 160 Display means 200 Test object 400 External control apparatus 410 Total accuracy calculation means

Claims (7)

In a measurement apparatus comprising measurement means for measuring measurement data input from a test object, or a measurement means for outputting a measurement signal to the test object and a display means for displaying the measurement data or the output signal,
Storage means for storing the measurement accuracy of the measurement data,
A measurement apparatus characterized by calculating measurement accuracy information from the measurement accuracy, measurement conditions, and measurement data, and displaying the measurement accuracy information on the display means. In a measurement apparatus comprising measurement means for measuring measurement data input from a test object, or a measurement means for outputting a measurement signal to the test object and a display means for displaying the measurement data or the output signal,
Storage means for storing the measurement accuracy of the measurement data together with the measurement data;
Measurement condition setting means for setting measurement conditions of the measurement means;
Measurement conditions set by the measurement condition setting means, measurement accuracy stored in the storage means, and accuracy calculation means for calculating measurement accuracy information from measurement data;
And a display control means for controlling an operation of displaying the measurement accuracy information on the display means.   The measurement apparatus according to claim 1, wherein the display control unit switches the measurement data and the measurement accuracy information to display on the display unit.   The measurement apparatus according to claim 1, wherein the display control unit displays the measurement accuracy information together with the measurement data on the display unit. The storage means stores a calibration date and a recommended calibration cycle,
5. The measuring apparatus according to claim 1, further comprising calibration expiration date determining means for determining whether the calibration date is within a range of a calibration expiration date from the calibration date and the recommended calibration cycle. The measuring device according to any one of claims 1 to 5 and an external control device are connected via a network,
The external control device includes a second display unit that displays the measurement accuracy information transmitted from these measurement devices. A plurality of measuring devices according to any one of claims 1 to 5 and an external control device are connected via a network,
The external control device includes a total accuracy calculation device that calculates measurement accuracy of the entire measurement system based on the measurement accuracy information transmitted from the plurality of measurement devices according to claims 1 to 5, and measurement of the entire measurement system. A measurement system comprising second display means for displaying accuracy.

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