JP5372581B2 - Measured value conversion device and measured value conversion method - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To reduce a data size of a measured value converting table. <P>SOLUTION: This measured value converter includes a memory which stores the measured value converting table for converting pre-conversion data D1 (pre-conversion measured value) into post-conversion data D2 (post-conversion measured value) in an exponential notation format and a conversion processing part which performs measured value conversion processing for converting data D1 into data D2 based on the table. The memory stores as the table a first converting table T1 where decimal parts of mantissa parts in the data D2 are related to data D1 and second converting tables T2 to T5 where integral parts of mantissa parts and exponential parts in the data D2 are related the range of the data D1. The conversion processing part specifies a decimal part corresponding to the data D1 in the table T1 and an integral part and an exponential part corresponding to a range to which the data D1 belongs in the tables T2 to T5 at the occasion of the measured value conversion processing and generates the data D2 based on the specified values. <P>COPYRIGHT: (C)2011,JPO&amp;INPIT

Description

  The present invention relates to a measurement value conversion apparatus and a measurement value conversion method for converting a plurality of pre-conversion measurement values into post-conversion measurement values in an exponential display format.

  In today's waveform recording apparatuses, a configuration is adopted in which an input signal (analog signal) is converted into digital data and recorded in various storage media in a measurement unit. For example, Japanese Patent Laid-Open No. 8-145728 discloses a signal waveform recording device (hereinafter also referred to as “waveform recording device”) configured to include an A / D converter, a loop memory, an external recording medium interface, and a control unit. It is disclosed. In this waveform recording apparatus, an A / D converter converts an analog signal waveform (measured value) into digital data and outputs it, and a loop memory temporarily stores the digital data output from the A / D converter. To do. Next, the control unit outputs the digital data stored in the loop memory from the external recording medium interface and records it on the external recording medium. In this case, in this type of measuring apparatus, the digital data output from the A / D converter is not recorded in the external recording medium in the form as it is, but the output digital data (hereinafter referred to as “data before conversion”) is used. Is generally recorded in a state of being converted into measurement value data (hereinafter also referred to as “converted data”) in a predetermined display format (an index display format as an example).

  Specifically, in the measurement apparatus such as the waveform recording apparatus described above, the digital data generated by the A / D converter according to the resolution is output. For example, in the A / D converter having a resolution of 16 bits, the input is performed. Any one of 65536 consecutive values is output for the signal. Accordingly, the digital data (pre-conversion data) output from the A / D converter does not directly represent the value (measured value) of the input signal, but is simply a list of numerical values. For this reason, in this type of measuring apparatus, post-conversion data that directly represents the signal voltage value of the analog signal waveform (e.g., decimal number measurement in exponential display format) for the pre-conversion data output from the A / D converter. Value) and the calculation result is converted into character data such as ASCII code in this order to generate converted data, and the generated converted data is stored in an external recording medium. A configuration for recording is adopted. Therefore, the waveform recording device disclosed in the above-mentioned publication discloses a plurality of conversions because it is necessary to sequentially execute each of the above arithmetic processes for all data to be recorded as post-conversion data. There is a problem that the time required for the conversion process for converting the previous data into the corresponding converted data is increased.

  On the other hand, in order to solve the above problems, the data before conversion is converted into data after conversion using a conversion table in which the value of the corresponding data after conversion is recorded in association with each value of the data before conversion. Configuration measuring devices have also been developed. In this case, in the measuring apparatus configured to convert the pre-conversion data into the post-conversion data using the conversion table, the value (character string) associated with the pre-conversion data is specified in the conversion table during the conversion process. It is possible to generate post-conversion data (convert pre-conversion data into post-conversion data) without performing complicated calculation processing simply by reading. Thereby, in the type of measuring apparatus using the conversion table, it is possible to shorten the time required for the conversion of data (measured values).

JP-A-8-145728 (page 4-7, Fig. 1-4)

  However, the measurement apparatus configured to convert pre-conversion data into post-conversion data using a conversion table has the following problems. That is, as described above, in the conversion table used in this type of measurement apparatus, the value of the corresponding converted data is recorded in association with each value of the pre-conversion data. For this reason, the data size of the conversion table is very large. Specifically, for the data before conversion of 65536 values from “−32768” to “+32767”, for example, the data before conversion of “−32768” is converted into data after conversion of “−3.27678E + 01V”, The conversion table for converting the pre-conversion data with “+32768” into the post-conversion data with “+ 3.26762E + 01V” has a record number of “65536” and the number of characters per record (the number of characters in one post-conversion data) ) Is “13 characters”, so that information of “65536” × “13” = “851968 characters” is recorded in total.

  In this case, when this conversion table is generated in, for example, the ASCII format, “1 character = 1 byte”, so the data size of the conversion table is “65536 bytes = 64 kbytes” × “13 characters” = “832 kbytes”. However, since “. (Decimal point)”, “E (exponential symbol)” and “V (unit symbol)” in each converted data are data commonly used in any converted data, By separating these three characters from the conversion table and using the common conversion data, the data size of the conversion data can be “64 kbytes” × “10 characters” = “640 kbytes”. As a result, “64 kbytes” × “3 characters” = “192 kbytes” is compared with the general conversion table in which the codes “.”, “E”, and “V” are included in the conversion table. Data size can be reduced.

  On the other hand, in the case of generating the conversion table by recording the numerical value part (the integer part of the mantissa part, the decimal part of the mantissa part, and the value of the exponent part) in the binary format instead of the ASCII format, in the converted data, Since each numerical value part is one of 10 values from “0” to “9”, it is possible to sufficiently record the numerical value part of each converted data with “1 value = 4 bits”. It becomes. In this case, in the above example, since the integer part of the mantissa part in each converted data is 1 digit, the data size is “4 bits × 1 digit = 4 bits”. Further, since the decimal part of the mantissa part in each converted data is 5 digits, the data size is “4 bits × 5 digits = 20 bits”. Furthermore, since the exponent part in each converted data is 2 digits, the data size is “4 bits × 2 digits = 8 bits”. In addition, the sign of the mantissa part and the exponent part (either “+” or “−”) can be expressed by “1 bit”. Therefore, since the data size per value of the converted data is “4 + 20 + 8 + 1 + 1 = 34 bits = 4.25 bytes”, the data size of the binary conversion table is “4.25 × 64 kbytes = 272 kbytes”.

  Thus, by generating the conversion table in the binary format instead of the ASCII format, the data size can be reduced by “640-272 = 368 kbytes”. However, even if the conversion table is generated in the binary format, the data size of one conversion table is still very large as “272 kbytes”. In this case, for example, in a measurement apparatus that executes different measurement processes for each of a plurality of measurement channels, when converting pre-conversion data into post-conversion data and recording it, the above conversion table having a large data size is measured. It is necessary to memorize every channel. Therefore, in the conventional waveform recording (measurement value conversion device) configured to convert the pre-conversion data into the post-conversion data using the conversion table, even if the conversion table is generated in the binary format and the data size is reduced. In order to store the conversion table, a large-capacity memory is required, which makes it difficult to reduce the manufacturing cost.

  The present invention has been made in view of such problems, and a main object of the present invention is to provide a measurement value conversion apparatus and a measurement value conversion method capable of sufficiently reducing the data size of the measurement value conversion table.

  In order to achieve the above object, the measurement value conversion apparatus according to claim 1 stores a measurement value conversion table for converting a plurality of measurement values before conversion into converted measurement values in an exponential display format, A measurement value conversion apparatus comprising: a conversion processing unit that executes a measurement value conversion process for converting each of the measurement values before conversion into the measurement value after conversion based on the measurement value conversion table, the storage unit Is a first conversion table in which each value of the decimal part of the mantissa part in the converted measurement value is associated with the measurement value before conversion, and the mantissa in the converted measurement value as the measurement value conversion table. A second conversion table that associates each value of the integer part of the part and each value of the exponent part in the converted measurement value with the range of the measurement value before conversion, and the conversion processing unit stores the conversion To processing Then, when converting the pre-conversion measurement value to the post-conversion measurement value, the first specification that specifies the value of the decimal part of the mantissa part corresponding to the pre-conversion measurement value in the first conversion table Processing and second specifying processing for specifying the value of the integer part and the exponent part of the mantissa corresponding to the range to which the measurement value before conversion belongs in the second conversion table, The converted measurement value is generated based on the value specified by the both specifying processes.

  The measurement value conversion device according to claim 2 is the measurement value conversion device according to claim 1, wherein the storage unit converts the decimal point, the exponent symbol, and the unit symbol in the converted measurement value from the conversion table. Separately stored as code data, the conversion processing unit generates the post-conversion measurement value based on the value specified by the two specifying processes and the code data at the time of the conversion process.

  Furthermore, the measurement value conversion device according to claim 3 is the measurement value conversion device according to claim 1 or 2, wherein the storage unit has the mantissa part in the converted measurement value as the second conversion table. A third conversion table that associates each value of the integer part with the range of the measurement value before conversion, and a third table that associates each value of the exponent part in the measurement value after conversion with the range of the measurement value before conversion. 4 conversion table, and the conversion processing unit, as the second specific processing, the integer part of the mantissa part corresponding to the range to which the pre-conversion measurement value belongs in the third conversion table And a third specifying process for specifying a value of the exponent corresponding to the range to which the measurement value before conversion belongs in the fourth conversion table. .

  According to a fourth aspect of the present invention, there is provided the measured value conversion apparatus according to the third aspect, wherein the storage unit is used as the fourth conversion table as the first upper part of the exponent part in the converted measurement value. A fifth conversion table in which each value of the digit is associated with the range of the measurement value before conversion, and each value of the digit other than the first digit of the exponent part in the measurement value after conversion is the value of the exponent part A sixth conversion table associated with each value of the first digit, and the conversion processing unit stores the measurement value before conversion in the fifth conversion table during the fourth specific process. A fifth specifying process for specifying the value of the first digit of the exponent corresponding to the range to which the value belongs, and the first digit value specified by the fifth specifying process in the sixth conversion table. The corresponding digit other than the first digit Respectively perform a sixth specific process that identifies the.

  Furthermore, the measurement value conversion apparatus according to claim 5 is the measurement value conversion apparatus according to any one of claims 1 to 4, wherein the storage unit performs the post-conversion measurement in which the integer part of the mantissa part is a positive integer. A first range of the pre-conversion measurement value to be converted into a value, a second range of the pre-conversion measurement value to be converted into the post-conversion measurement value in which the integer part of the mantissa part is a negative integer, and the mantissa part of Storing a seventh conversion table capable of specifying a third range of the pre-conversion measurement values to be converted into the post-conversion measurement values having an integer part of 0, and the second conversion table being the first conversion table; The conversion processing unit is divided and stored in association with each range of the measurement values before conversion in the conversion table of 7, and the conversion processing unit is based on the seventh conversion table in the second specific processing. Which of the above ranges each measured value before conversion belongs to And specifying an integer part value and an exponent part value of the mantissa part corresponding to the range to which the measurement value before conversion belongs in the second conversion table associated with the specified range. To do.

  The measurement value conversion method according to claim 6 is a measurement value conversion method for converting a plurality of pre-conversion measurement values into post-conversion measurement values in an exponential display format based on a measurement value conversion table. As a value conversion table, a first conversion table in which each value of the decimal part of the mantissa part in the converted measurement value is associated with the measurement value before conversion, and an integer part of the mantissa part in the measurement value after conversion And the second conversion table in which each value of the exponent part of the measured value after conversion is associated with the range of the measured value before conversion, and the measured value before conversion is used as the measured value after conversion. When converting, a first specifying process for specifying a fractional part value of the mantissa part corresponding to the measurement value before conversion in the first conversion table, and before conversion in the second conversion table Measurement A second specifying process for specifying the value of the integer part of the mantissa part and the value of the exponent part corresponding to the range to which the value belongs, and performing the post-conversion measurement based on the values specified by the two specifying processes Generate a value.

  In the measured value conversion apparatus according to claim 1 and the measured value conversion method according to claim 6, for the first conversion, each value of the fractional part of the mantissa part in the converted measured value is associated with each measured value before conversion. A table and a second conversion table in which each value of the integer part of the mantissa part in the converted measurement value and each value of the exponent part in the converted measurement value are associated with the range of the measurement value before conversion, for conversion of the measurement value First specification for specifying the value of the fractional part of the mantissa part corresponding to the measurement value before conversion in the first conversion table when converting the measurement value before conversion into the measurement value after conversion in the conversion process And a second specifying process for specifying the value of the integer part and the exponent part of the mantissa part corresponding to the range to which the measurement value before conversion belongs in the second conversion table, and specifying by both specifying processes Based on the value Generating a converted measured value.

  Therefore, according to the measurement value conversion apparatus according to claim 1 and the measurement value conversion method according to claim 6, the values of the integer part and the exponent part of the mantissa part with many pre-conversion measurement values having the same value are specified. For the measurement value conversion table for the above, by adopting a configuration and method for recording the range of the pre-conversion measurement value that becomes the same value, an integer of the mantissa part corresponding to each value of the pre-conversion measurement value The data size can be made sufficiently small as compared with the conversion table configured to individually record the values of the part and the exponent part. Thus, according to the measurement value conversion apparatus and the measurement value conversion method, the total data size of the measurement value conversion table necessary for converting the measurement value before conversion into the measurement value after conversion is sufficiently reduced. Therefore, each measurement value conversion table can be reliably stored even in a storage unit (memory) having a small capacity. For this reason, since it is not necessary to mount an excessively large storage unit, the manufacturing cost of the measurement value conversion device can be sufficiently reduced.

  According to the measurement value conversion apparatus of claim 2, after the conversion, the measurement value before conversion is generated by generating the measurement value after conversion based on the value specified by the two specification processes and the code data at the time of the conversion process. Compared with a configuration (conversion method) in which a code such as “.” Or “E” is recorded in each corresponding record in the measurement value conversion table for conversion into a measurement value, any measured value after conversion By providing these codes to be used as code data as shared data separately from the measurement value conversion table, data for converting the measurement value before conversion into the measurement value after conversion (measurement value conversion table and code data) ) Can be further reduced.

  Furthermore, according to the measurement value conversion apparatus of claim 3, the third conversion table in which each value of the integer part of the mantissa part in the converted measurement value is associated with the range of the measurement value before conversion, and the measurement after conversion The fourth conversion table that associates each value of the exponent part in the value with the range of the measurement value before conversion is used as the second conversion table, and conversion is performed in the third conversion table as the second specifying process. A third specifying process for specifying the value of the integer part of the mantissa part corresponding to the range to which the previous measurement value belongs, and the value of the exponent part corresponding to the range to which the measurement value before conversion belongs in the fourth conversion table By executing each of the fourth specific processes, compared with a configuration (conversion method) using one type of second conversion table that combines the third conversion table and the fourth conversion table, Few records By simply searching the third conversion table and the fourth conversion table for the number of conversions several times, it is possible to specify the value of the measurement value after conversion corresponding to the measurement value before conversion. The time required to convert the measured value to the converted measured value can be sufficiently shortened.

  According to the measurement value conversion apparatus of the fourth aspect, the fifth conversion table in which each first digit value of the exponent part in the converted measurement value is associated with the range of the measurement value before conversion, and the converted value A sixth conversion table in which each value of the digit other than the first digit of the exponent part in the measured value is associated with each value of the first digit of the exponent part is used as a fourth conversion table, and a fourth specification is made. At the time of processing, the fifth specifying process for specifying the first digit value of the exponent part corresponding to the range to which the measurement value before conversion belongs in the fifth conversion table, and the fifth specifying process in the sixth conversion table The fifth conversion table and the sixth conversion table are collected by executing the sixth specifying process for specifying the value of the digit other than the first digit corresponding to the value of the first digit specified by One kind of the fourth conversion table and the third Compared with the configuration using the conversion table (conversion method), it is only necessary to search each measurement value conversion table having a smaller number of records several times, and to convert the measured values after conversion corresponding to the measurement values before conversion. Since the value can be specified, the time required to convert the measurement value before conversion into the measurement value after conversion can be further shortened.

  Furthermore, according to the measurement value conversion apparatus according to claim 5, the first range of the pre-conversion measurement value in which the integer part of the mantissa part is converted into a post-conversion measurement value having a positive integer and the integer part of the mantissa part are negative. A second range of pre-conversion measurement values to be converted to an integer converted measurement value and a third range of pre-conversion measurement values to be converted to a post-conversion measurement value in which the integer part of the mantissa is 0 can be specified. While using the seventh conversion table and using the second conversion table divided in association with each range of the pre-conversion measurement values in the seventh conversion table, Based on the conversion table, specify which of the ranges the measurement value before conversion belongs to, and a mantissa part corresponding to the range to which the measurement value before conversion belongs in the second conversion table associated with the specified range Identifies the integer and exponent values of Accordingly, the number of records in the second conversion table can be reduced as compared with the configuration (conversion method) using one type of second conversion table without providing the seventh conversion table. Therefore, the time required to convert the pre-conversion measurement value into the post-conversion measurement value can be further reduced by the amount that the time required for searching the second conversion table can be reduced.

1 is a block diagram of a measuring device 1. FIG. 4 is a display screen diagram of a measurement result display screen 10. FIG. It is explanatory drawing for demonstrating an example of the data D1 before conversion, and the data D2 after conversion. In order to explain the mutual relationship between the conversion tables T1, T2, T3P, T3M, T4PP2 to T4PP0, T4PM0 to T4PM2, T4MP2 to T4MP0, T4MM0 to T4MM2, T5PP29 to T5PP00, T5PM01 to T5PM29, T5MP29 to T5MP00, T5MM01 to T5MM29 It is explanatory drawing of. It is explanatory drawing for demonstrating an example of the table T1 for conversion. It is explanatory drawing for demonstrating an example of the table T2 for conversion. It is explanatory drawing for demonstrating an example of the table T3P for conversion. It is explanatory drawing for demonstrating an example of table T3M for conversion. It is explanatory drawing for demonstrating an example of table T4PP0 for conversion. It is explanatory drawing for demonstrating an example of table T4PP1 for conversion. It is explanatory drawing for demonstrating an example of table T4PP2 for conversion. It is explanatory drawing for demonstrating an example of table T4PM0 for conversion. It is explanatory drawing for demonstrating an example of table T4PM1 for conversion. It is explanatory drawing for demonstrating an example of conversion table T4PM2. It is explanatory drawing for demonstrating an example of table T5PM01 for conversion. It is explanatory drawing for demonstrating an example of table T5PM02 for conversion. It is explanatory drawing for demonstrating an example of table T5PM03 for conversion. It is explanatory drawing for demonstrating an example of table T5PM04 for conversion. 10 is a flowchart of measured value conversion processing 20.

  Embodiments of a measurement value conversion apparatus and a measurement value conversion method according to the present invention will be described below with reference to the accompanying drawings.

  A measuring apparatus 1 shown in FIG. 1 is an example of a measured value conversion apparatus, and includes A / D conversion units 2a and 2b, a display unit 3, a control unit 4, and storage units 5 and 6. A / D converters 2a and 2b (hereinafter also referred to as “A / D converter 2” when not distinguished from each other) input signals S1 and S2 (hereinafter also referred to as “input signal S” when not distinguished from each other) as A / D. It converts (measures an electrical parameter) and outputs it as pre-conversion data D1 (an example of a pre-conversion measurement value). In this case, as an example, the A / D conversion unit 2 has a resolution of 16 bits, and, as will be described later, any one of 65536 values from “−32768” to “+32767” is used as the pre-conversion data D1. Output. The pre-conversion data D1 output from the A / D conversion unit 2 is actually a binary number, but in order to facilitate understanding of the present invention, hereinafter, each value of the pre-conversion data D1 is 10 This is described in decimal.

  The display unit 3 includes a liquid crystal panel as an example, and displays a measurement result display screen 10 according to the control of the control unit 4 as shown in FIG. In this case, in the measurement apparatus 1, the above-mentioned pre-conversion data D1 is converted into post-conversion data D2 (an example of the post-conversion measurement value) in the exponential display format and stored in the storage unit 6, and based on the post-conversion data D2 Thus, a configuration in which the measurement result 11 is displayed on the measurement result display screen 10 is employed. Specifically, as shown in FIG. 3, for example, when the pre-conversion data D1 of “−00006” is output from the A / D conversion unit 2a (CH1), the pre-conversion data D1 is “−5. 80000E-03V "is converted into recorded data D2 and recorded, and as shown in FIG. 2, the measurement result 11 based on the converted data D2 is the measurement result as the measurement result of the A / D converter 2a (CH1). It is displayed on the display screen 10.

  The control unit 4 comprehensively controls the measuring device 1. The control unit 4 is an example of a conversion processing unit. As will be described later, the control unit 4 executes a measurement value conversion process 20 shown in FIG. 19 and performs conversion tables T1, T2, T3P, T3M, T4PP0 to T0 shown in FIG. T4PP2, T4PM0 to T4PM2, T4MP0 to T4MP2, T4MM0 to T4MM2, T5PP00 to T5PP29, T5PM01 to T5PM29, T5MP00 to T5MP29, T5MM01 to T5MM29 (hereinafter referred to as "conversion table T" when not distinguished (The value in each conversion table T is updated), and the pre-conversion data D1 output from the A / D conversion unit 2 is converted into post-conversion data D2 using each conversion table T. To be stored in the storage unit 6. Moreover, the control part 4 displays the measurement result 11 based on the stored post-conversion data D2 on the display part 3 (measurement result display screen 10).

  In this case, the conversion table T1 is an example of a first conversion table. As shown in FIG. 5, each conversion of 65536 values from “−3.27678E + 01” to “+ 3.272672E + 01” as final output values is performed. Each value of the fractional part PMD (see FIG. 3) of the mantissa part PM in the post-data D2 is configured to be able to be recorded in association with each pre-conversion data D1 of 65536 values from “−32768” to “+32767”. In this figure, in order to facilitate understanding of the present invention, data D1 before conversion (input value), data D2 after conversion (final output value), and data contents (output value) of the conversion table T1. Are shown side by side, but the actual conversion table T1 is composed of 5-digit numerical information of 65536 records surrounded by a thick frame in the figure, and the first record (the uppermost record in the figure) Is associated with the pre-conversion data D1 of “−32768” and the 65536th record (the lowest record in the figure) is associated with the pre-conversion data D1 of “+32767”. The data size of the conversion table T1 is “2 × 64k = 128 kbytes”.

  Further, in this measuring apparatus 1, as will be described later, each conversion table T is initialized immediately after the start of the measured value conversion process 20, and at this time, each record of the conversion table T1 includes, for example, “65535. "Is recorded as an initial value. Further, when the converted data D2 corresponding to the pre-conversion data D1 of any value is calculated with the execution of the measurement value conversion process 20, the post-conversion data D2 is converted into a record corresponding to the pre-conversion data D1. The 5-digit value of the decimal part PMD of the mantissa part PM is recorded. At this time, when a predetermined value other than “65535” is recorded in the record associated with the pre-conversion data D1 to be converted in the conversion table T1, the control unit 4 sets the pre-conversion data D1. It is determined that the conversion process has already been performed, and the recorded value is read from each conversion table T to generate post-conversion data D2.

  When the initial value “65535” is recorded in the record associated with the conversion target pre-conversion data D1 in the conversion table T1, the control unit 4 performs the conversion process on the pre-conversion data D1. It is determined that the data has not been executed, predetermined arithmetic processing is performed on the pre-conversion data D1, and post-conversion data D2 is generated. Based on the generated post-conversion data D2, the corresponding record in each conversion table T is stored. Record the value for the conversion process. Thus, in this measuring apparatus 1, based on whether the value of the conversion table T1 is “65535 (initial value recorded after initialization)” or other values, the pre-conversion data D1 A configuration is employed in which either the processing for generating the post-conversion data D2 by the above arithmetic processing or the processing for generating the post-conversion data D2 using a value corresponding to the pre-conversion data D1 in each conversion table T is employed. ing. The recording of values for the conversion table T, the process of generating the converted data D2 using each conversion table T, and the like will be described in detail later.

  The conversion table T2 is an example of a seventh conversion table. As illustrated in FIG. 6, the integer part PMI (see FIG. 3) of the mantissa part PM is converted to a positive integer (“+”). The upper limit value and the lower limit value indicating the range (first range) of the pre-conversion data D1 to be converted to the data D2 and the post-conversion data D2 in which the integer part PMI of the mantissa part PM is a negative integer ("-") The upper limit value and lower limit value indicating the range (second range) of the pre-conversion data D1 to be converted, and the range of the pre-conversion data D1 to be converted to the post-conversion data D2 whose PMI of the mantissa part PM is “0” (third Range), and three flags indicating whether the values recorded as the upper limit value and the lower limit value of each range are valid or invalid. The relationship between each value in the conversion table T2, the pre-conversion data D1, and the post-conversion data D2 will be specifically described later.

  Also, in FIG. 6, in order to facilitate understanding of the present invention, the content (output value) of whether to convert the post-conversion data D2 into “+”, “0”, or “−”, and the pre-conversion The upper limit value and the lower limit value in the range of the data D1 (input value), the flag value (valid, invalid), and the type (remarks) of the conversion table T3 corresponding to each range are shown side by side. However, the actual conversion table T2 is composed of values (three upper limit values, three lower limit values, and three flags) surrounded by a thick frame in the figure, and the first record (the upper record in the figure). Is associated with the converted data D2 of “+”, the second record (the central record in the figure) is associated with the converted data D2 of “0”, and the third record (the lower record in the figure) Is converted data D2 with "-" It is associated. The data size of the conversion table T2 is “3 × (2 + 2 + 1) = 15 bytes”.

  Furthermore, the conversion tables T3P and T3M correspond to a fifth conversion table that constitutes a part of the fourth conversion table as a part of the second conversion table. As shown in FIG. 7, the conversion table T3P includes each value of the first digit of the exponent part PI (see FIG. 3) in the post-conversion data D2 in which the integer part PMI of the mantissa part PM is “+”. Are recorded so as to be associated with the range (upper limit value and lower limit value) of the pre-conversion data D1 to be converted. As shown in FIG. 8, the conversion table T3M is a conversion to convert each value of the first digit of the exponent part PI in the converted data D2 in which the integer part PMI of the mantissa part PM is “−” into each value. Recording is performed in association with the range (upper limit value and lower limit value) of the previous data D1.

  In this case, in the post-conversion data D2 generated (converted) during various measurement processes using the measurement apparatus 1, the values of the exponent part PI are “+00” to “+29” and “−01” to “−”. 29 ". Therefore, in this measuring apparatus 1, the first digit value of the exponent part PI in the converted data D2 is “+2”, “+1”, “+0”, “−0”, “−1” and “−2”. It is defined as one of six values. For this reason, the conversion tables T3P and T3M (hereinafter also referred to as “conversion table T3” when not distinguished from each other) are before conversion to be converted into post-conversion data D2 in which the first digit value of the exponent part PI is “+2”. An upper limit value and a lower limit value indicating the range of the data D1, an upper limit value and a lower limit value indicating a range to be converted to “+1”, an upper limit value and a lower limit value indicating a range to be converted to “+0”, and “−0” "Upper limit value and lower limit value indicating the range to be converted", upper limit value and lower limit value indicating the range to be converted to "-1", upper limit value and lower limit value indicating the range to be converted to "-2" Each of the six flags indicating whether the value recorded as the upper limit value and the lower limit value of each range is valid or invalid can be recorded.

  In this case, the pre-conversion data D1 of “−32768” to “+32767” is converted into post-conversion data D2 of “−3.227678E + 01” to “+ 3.27262E + 01”. In this example, the exponent part PI of the post-conversion data D2 The first digit value is either “+0” or “−0”. Therefore, in this example, the record in which the upper limit value and the lower limit value indicating the range of the pre-conversion data D1 to be converted to the post-conversion data D2 in which the first digit value of the exponent part PI is “+0” is recorded; Only two records are used, that is, a record in which an upper limit value and a lower limit value indicating a range to be converted to “0” are recorded. The relationship between each value in each conversion table T3 and the pre-conversion data D1 and post-conversion data D2 will be specifically described later.

  7 and 8, in order to facilitate understanding of the present invention, the range of the first digit value (output value) of the exponent part PI and the pre-conversion data D1 (input value) in the post-conversion data D2. Upper limit value and lower limit value, flag value, first digit value of exponent part PI in converted data D2 to be finally converted, and type of conversion table T4 corresponding to each range (remarks) Are shown side by side, but the actual conversion table T3 is composed of values (six upper limit values, six lower limit values, and six flags) surrounded by a thick frame in both figures. In the actual conversion table T3, the first record (the uppermost record in FIGS. 7 and 8) is associated with the post-conversion data D2 of “the first digit of the exponent part PI = [+ 2]”, and the sixth record (The lowest record in both) is associated with the post-conversion data D2 of “the first digit of the exponent part PI = [− 2]”. The total data size of the conversion table T3 is “2 × 6 × (2 + 2 + 1) = 60 bytes”.

  Also, the conversion tables T4PP0 to T4PP2, T4PM0 to T4PM2, T4MP0 to T4MP2, T4MM0 to T4MM2 (hereinafter also referred to as “conversion table T4” when not distinguished) are the fourth conversion table as a part of the second conversion table. This corresponds to a sixth conversion table constituting another part of the conversion table. In this case, as shown in FIGS. 9 to 11, in the three conversion tables T4 of the conversion tables T4PP0 to T4PP2, the integer part PMI of the mantissa part PM is “+” and the exponent part PI (see FIG. 3) is “+”. In the post-conversion data D2, each value other than the first digit of the exponent part PI is recorded in association with the range (upper limit value and lower limit value) of the pre-conversion data D1 to be converted to each value. Yes. Also, as shown in FIGS. 12 to 14, the three conversion tables T4 of the conversion tables T4PM0 to T4PM2 include post-conversion data D2 in which the integer part PMI of the mantissa part PM is “+” and the exponent part PI is “−”. Each value other than the first digit of the exponent part PI is associated with the range (upper limit value and lower limit value) of the pre-conversion data D1 to be converted into each value, and can be recorded.

  Further, the three conversion tables T4 (not shown) of the conversion tables T4MP0 to T4MP2 include an exponent part PI in the converted data D2 in which the integer part PMI of the mantissa part PM is “−” and the exponent part PI is “+”. Each value other than the first digit is associated with the range (upper limit value and lower limit value) of the pre-conversion data D1 to be converted into each value, and can be recorded. Further, three conversion tables T4 (not shown) of the conversion tables T4MM0 to T4MM2 have an exponent part PI in the converted data D2 in which the integer part PMI of the mantissa part PM is “−” and the exponent part PI is “−”. Each value other than the first digit is associated with the range (upper limit value and lower limit value) of the pre-conversion data D1 to be converted into each value, and can be recorded.

  In this case, when the first digit value of the exponent part PI in the converted data D2 is “+0”, the value of the exponent part PI other than the first digit (in this example, the last one digit) is “0”. Any one of 10 values of “9”. Therefore, as shown in FIG. 9, the conversion table T4PP0 indicates the range of the pre-conversion data D1 to be converted into the post-conversion data D2 whose values other than the first digit of the exponent part PI are “0” to “9”. Each of the upper limit value and the lower limit value shown and each of ten flags indicating whether the values recorded as the upper limit value and the lower limit value of each range are valid or invalid can be recorded. Similarly, in the conversion tables T4PP1, T4PP2, T4PM0 to T4PM2 shown in FIGS. 10 to 14 and the conversion tables T4MP0 to T4MP2, T4MM0 to T4MM2 (not shown), values other than the first digit of the exponent part PI are “0”. The upper limit value and the lower limit value indicating the range of the pre-conversion data D1 to be converted to the post-conversion data D2 from “9” to “9”, and the values recorded as the upper limit value and the lower limit value of each range are valid. Each of the ten flags indicating invalidity can be recorded. The relationship between each value in each conversion table T4 and the pre-conversion data D1 and post-conversion data D2 will be specifically described later.

  9 to 14, in order to facilitate understanding of the present invention, the value of the exponent part PI (output value) in the post-conversion data D2 and the upper limit value in the range of the pre-conversion data D1 (input value) and The lower limit value, the flag value, the first digit value of the exponent part PI in the finally converted data D2, and the type (remarks) of the conversion table T5 corresponding to each range are arranged side by side. Although shown in the figure, the actual conversion table T4 is a value surrounded by a thick frame in both figures (10 upper limit values, 10 lower limit values, and 10 flags: only the conversion table T4PM0 is 9 Number of upper limit values, nine lower limit values, and nine flags). In the actual conversion table T4, the first record (the uppermost record in each figure) is associated with the post-conversion data D2 of “value other than the first digit of the exponent part PI = [9]”. The record (the lowest record in each figure) is associated with the post-conversion data D2 of “value other than the first digit of the exponent part PI = [0]”. The total data size of the conversion table T4 is “((6 + 6) × 10−1) × (2 + 2 + 1) = 595 bytes”.

  Furthermore, the conversion tables T5PP29 to T5PP00, T5PM01 to T5PM29, T5MP29 to T5MP00, and T5MM01 to T5MM29 (hereinafter also referred to as “conversion table T5” when not distinguished) constitute another part of the second conversion table. This corresponds to the third conversion table. In this case, each conversion table T5 is configured to be able to record each value of the integer part PMI of the mantissa part PM in the converted data D2 in association with the range of the pre-conversion data D1. Specifically, as an example, the conversion table T5PM01 shown in FIG. 15 converts each value of the integer part PMI of the mantissa part PM in the post-conversion data D2 whose exponent part PI is “−01” into the respective values. It is configured to be recordable in association with the range (upper limit value and lower limit value) of power pre-conversion data D1. In this case, since the integer part PMI of the mantissa part PM is any one of “+1” to “+9” and “−1” to “−9”, the exponent part PI is “−01” in this conversion table T5PM01. The range of the pre-conversion data D1 to be converted to the post-conversion data D2 in which the integer part PMI of the mantissa part PM in the post-conversion data D2 is “+1” to “+9” is recordable.

  Further, in the conversion table T5 used in the measuring apparatus 1, the decimal part PMD of the mantissa part PM is expressed by “in order to smoothly perform arithmetic processing by the control unit 4 when converting the pre-conversion data D1 into the post-conversion data D2. The conversion table T1 is configured to be manageable with values in the range of “00000” to “49999”, and the values of “50000” to “99999” are “00000” to “49999” in the conversion table T1. The conversion table T5 is configured so that the decimal part PMD managed as a value within the range is converted into a value within the range of “50000” to “99999” by the conversion table T5. Therefore, in the conversion table T5PM01, the converted data in which the fractional part PMD in the mantissa part PM is in the range from “00000” to “49999” and the integer part PMI of the mantissa part PM is “+1” to “+9”. A record for recording the range (upper limit value and lower limit value) of the pre-conversion data D1 to be converted into D2 (for example, a record whose “output value” is “+9.0”, “+8.0”, etc.); and the mantissa part PM The range of the pre-conversion data D1 to be converted to the post-conversion data D2 in which the decimal part PMD is in the range from “50000” to “99999” and the integer part PMI of the mantissa part PM is “+1” to “+9” And a record for recording (upper limit value and lower limit value) (for example, a record whose “output value” is “+9.5”, “+8.5”, etc.).

  Each value of the integer part PMI of the mantissa part PM in the post-conversion data D2 with the exponent part PI of “−02” is respectively in the range (upper limit value and lower limit value) of the pre-conversion data D1 to be converted to each value. Each value of the integer part PMI of the mantissa part PM in the post-conversion data D2 having the conversion part T5PM02 (see FIG. 16) and the exponent part PI of “−03” configured to be associated and recordable is converted to each value. The conversion table T5PM03 (see FIG. 17) configured to be recordable in association with the range (upper limit value and lower limit value) of the pre-conversion data D1, and the mantissa in the post-conversion data D2 whose exponent part PI is “−04” The conversion table configured to be able to record each value of the integer part PMI of the part PM in association with the range (upper limit value and lower limit value) of the pre-conversion data D1 to be converted into each value. T5PM04 (see FIG. 18) for also configured similarly to the above conversion table T5PM01. Actually, 114 conversion tables T5 are used in addition to the conversion tables T5PM01 to T5PM04, but only four of the conversion tables T5PM01 to T5PM04 out of a total of 118 conversion tables T5 are used. While illustration in FIGS. 15-18, illustration about the other conversion table T5 is abbreviate | omitted. In this case, the total data size of each conversion table T5 is “(30 + 29 + 29 + 30) × 18 × (2 + 2 + 1) = 10620 bytes”.

  In this case, as shown in FIG. 5, the pre-conversion data D1 (“input value” in the figure) of “−32768” to “+32767” and the post-conversion data D2 obtained by converting the pre-conversion data D1 (in the figure) Looking at the relationship with the “final output value”), for example, the pre-conversion data D1 to be converted into a value with the exponent part PI being “−01” is “−01000” to “−00101” or “+00100” to “ It can be seen that there are a plurality of such as “+00999”. Similarly, for example, there are a plurality of pre-conversion data D1 to be converted into a value of “−02” in the exponent part PI, such as “−00100” to “−00011” and “+00010” to “+00099”. I understand. Therefore, in the measuring apparatus 1, in the conversion table T3 for determining the first digit of the exponent part PI, a plurality of conversions to be converted into the converted data D2 in which the first digit of the exponent part PI is “−0”. Rather than individually recording the previous data D1, a plurality of pre-conversion data D1 to be converted to post-conversion data D2 in which the first digit of the exponent PI is “−0” is recorded so that the range of the values can be specified As a result, the data size of the conversion table T3 is reduced.

  Specifically, as an example, a record of [when the pre-conversion data D1 of the value “−01000” is converted into post-conversion data D2, the first digit of the exponent PI is “−0”]. , [When the pre-conversion data D1 of the value “−00999” is converted into the post-conversion data D2, the first digit of the exponent part PI is “−0”], and the record “[−00998” When converting the pre-conversion data D1 of the value to the post-conversion data D2, the first digit of the exponent part PI is “−0”], and the pre-conversion data D1 of the value “−00997” Is converted to post-conversion data D2, the record with the first digit of the exponent PI is “−0”, and the pre-conversion data D1 with the value of “−00996” are converted into post-conversion data D2. When converting, the first digit of the exponent PI is “−0”] When the conversion table is configured by separately recording these records, as a result, it takes five records to specify that the first digit of the exponent part PI is “−0”. The data size of the conversion table becomes very large.

  On the other hand, as in the conversion table T3, for example, [the pre-conversion data D1 to be converted into the post-conversion data D2 in which the first digit of the exponent part PI is “−0” is “−1000” to “−1000”. -00996 "] and forming the conversion table T, it is only necessary to prepare one record in order to specify that the first digit of the exponent part PI is" -0 ". That's it. For this reason, it is possible to sufficiently reduce the data size of the conversion table. Similarly, in this measuring apparatus 1, in the conversion table T4 for determining a value other than the first digit of the exponent part PI (in this example, the last digit value of the exponent part PI), the exponent part PI is Rather than individually recording a plurality of pre-conversion data D1 to be converted to “−01” post-conversion data D2, a plurality of pre-conversion data to be converted to post-conversion data D2 whose exponent part PI is “−01” By recording the value range of the data D1 in an identifiable manner, the data size of the conversion table T4 is sufficiently small. Also, with respect to the conversion table T5 for determining the integer part PMI of the mantissa part PM, a plurality of pre-conversion data D1 to be converted into values such as “+2” and “+1” is not recorded individually. For example, the data size of the conversion table T5 is sufficiently small by recording the range of values of the plurality of pre-conversion data D1 to be converted into the post-conversion data D2 whose integer part PMI is “+02”. .

  The storage unit 5 stores the conversion table data Dt of each of the conversion tables T and code data Ds of codes such as “.”, “E”, and “V” in the converted data D2. In this case, as described above, the data size of the conversion table T1 is 128 kbytes, the data size of the conversion table T2 is 15 bytes, the total data size of each conversion table T3 is 60 bytes, and the total of each conversion table T4 Since the data size is 595 bytes and the total data size of each conversion table T5 is 10620 bytes, the total data size of each conversion table T is about 139 kbytes. Therefore, in order to store the two sets of conversion tables T for the A / D conversion units 2a and 2b and the code data Ds, each pre-conversion data D1 can be handled only by facilitating a small storage capacity of about 278 kbytes. Each can be converted into post-conversion data D2.

  In this case, as described above, when the conversion table used in the conventional conversion method is recorded in the binary format, the data size of the conversion table is 272 kbytes. On the other hand, since the total data size of each conversion table T used in this measuring apparatus 1 is 139 kbytes as described above, 133 kbytes is also smaller than the conventional conversion table T. The storage unit 6 stores post-conversion data D2 converted (generated) by the control unit 4. In this case, the storage medium for storing the post-conversion data D2 is not limited to the storage unit 6 built in the measurement apparatus 1 (measurement value conversion apparatus), and various storage media (hard disk drives and optical recording disks) as external apparatuses. Etc.) may be employed in which the post-conversion data D2 is stored.

  Next, measurement value conversion processing by the measurement apparatus 1 will be described with reference to the accompanying drawings.

  When the pre-conversion data D1 is converted into the post-conversion data D2 using each of the conversion tables T, each conversion table T is generated in advance according to the conversion contents and stored in the storage unit 5 prior to the conversion process. It is also possible to adopt a configuration (conversion method) stored in the memory. However, each conversion table T cannot be generated unless the setting of various measurement conditions (that is, conditions for converting the pre-conversion data D1 to the post-conversion data D2) is completed. Since a certain amount of time is required to generate each conversion table T, when the configuration (conversion method) for generating each conversion table T prior to the conversion process is adopted, after setting the measurement conditions is completed. As a result of the long time required for starting the conversion process (measurement process), it may be difficult to immediately start the conversion process.

  On the other hand, in the measuring apparatus 1, when it becomes necessary to convert the pre-conversion data D1 into the post-conversion data D2 (specifically, the conversion generated under the measurement conditions after the measurement conditions are set) A process of converting the pre-conversion data D1 into the post-conversion data D2 by the arithmetic processing without using the conversion table T when executing the processing of converting the pre-data D1 into the post-conversion data D2, and the calculation result The conversion table T2 is sequentially executed based on the data, and the pre-conversion data D1 converted into the post-conversion data D2 by the arithmetic processing (that is, the pre-conversion data D1 in which the corresponding values are recorded in the conversion table T) ), A configuration is employed in which the data is converted into post-conversion data D2 by using the conversion table T without executing the arithmetic processing.

  Specifically, when setting of the measurement conditions is completed and the start of the measurement process is instructed, the control unit 4 controls the A / D conversion units 2a and 2b to measure the input signals S1 and S2. (Generation processing of pre-conversion data D1) is started. In response to this, the A / D converters 2a and 2b execute measurement processing on the input signals S1 and S2 at a predetermined sampling rate, and sequentially output the corresponding pre-conversion data D1. Moreover, the control part 4 starts the measured value conversion process 20 shown in FIG. In this measured value conversion process 20, first, the control unit 4 initializes each conversion table T (step 21). At this time, the control unit 4 overwrites the values of all records for the conversion table T1 with the value “65535”, and for the conversion tables T2 to T5, for example, “ The “upper limit value” and the “lower limit value” are set to “+00000”, and the flag is set to “invalid”. Next, the control unit 4 starts a process of converting the pre-conversion data D1 output from the A / D conversion unit 2 into post-conversion data D2.

  Specifically, the control unit 4 includes the pre-conversion data D1 (unconverted conversion) that has not been completely converted to the post-conversion data D2 among the pre-conversion data D1 sequentially output from the A / D conversion unit 2. It is determined that the previous data D1) exists (in this example, the conversion process of the pre-conversion data D1 is not executed) (step 22), and the process of converting the unconverted pre-conversion data D1 to the post-conversion data D2 is performed. Start. In this process, the control unit 4 first determines whether or not the pre-conversion data D1 output from the A / D conversion unit 2 has already been converted into post-conversion data D2 (that is, the corresponding value is converted into each conversion value). Whether or not it is recorded in the table T (step 23). Specifically, when the record in the conversion table T1 corresponding to the value of the pre-conversion data D1 to be converted is the initial value “65535”, the control unit 4 executes the conversion process for the pre-conversion data D1. It is determined that the corresponding data does not exist in the conversion table T, and the record of the conversion table T1 corresponding to the value of the pre-conversion data D1 to be converted is a value other than the initial value “65535”. In some cases, the control unit 4 determines that the conversion process for the pre-conversion data D1 has been performed (the corresponding data exists in the conversion table T).

  At this time, as an example, when the pre-conversion data D1 having the value “+00020” is output from the A / D conversion unit 2, the control unit 4 refers to the record corresponding to “+00020” in the conversion table T1. To do. At this time, since the referenced record is the initial value (“65535”), the conversion process for the pre-conversion data D1 of that value has never been executed (the record corresponding to “+00020” in the conversion table T). And a valid value is not recorded: the corresponding data does not exist), and a value of “+ 2.02000E-02V” is calculated as converted data D2 by calculation processing (character string calculation (generation): Step 24). Next, based on the calculation result (in this example, “+ 2.02000E-02V”), the control unit 4 changes the value of the record corresponding to “+00020” in the conversion table T1 from the initial value “65535”. The value of the mantissa part PMD of the mantissa part PM in the above calculation result is changed to a value (in this example, a value of “02000”) (update of the conversion table T1: step 25).

  Subsequently, since the integer part PMI of the mantissa part PM in the calculation result is a positive integer (“+”), the control unit 4 sets the flag of the record “+ (positive)” in the conversion table T2 to “invalid”. Therefore, the “upper limit value” and the “lower limit value” are changed from the initial value “+00000” to the value “+00020”, and the flag of the record is changed to “valid” (conversion table T2 Update: Step 26). Next, since the first digit of the exponent part PI in the calculation result is “−0”, the control unit 4 determines that the flag of the record corresponding to “−0” in the conversion table T3P is “invalid”. The “upper limit value” and the “lower limit value” are changed from the initial value “+00000” to the value “+00020”, and the flag of the record is changed to “valid” (update of the conversion table T3: Step 27) ). Subsequently, since the value other than the first digit (value of the last digit) of the exponent part PI in the calculation result is “2”, the control unit 4 stores the record corresponding to “−02” in the conversion table T4PM0. Since the flag is “invalid”, the “upper limit value” and “lower limit value” are changed from the initial value “+00000” to the value “+00020”, and the flag of the record is changed to “valid”. (Update of conversion table T4: Step 28).

  Next, since the integer part PMI in the mantissa part PM in the calculation result is “+2”, the control unit 4 determines that the flag of the record corresponding to “+2.0” in the conversion table T5PM02 is “invalid”. The “upper limit value” and the “lower limit value” are changed from the initial value “+00000” to the value “+00020”, and the flag of the record is changed to “valid” (update of the conversion table T5: Step 29) ). As a result, each conversion table T is updated so that the pre-conversion data D1 having a value of “+00020” can be converted into post-conversion data D2 having a value of “+ 2.02000E-02V”. Subsequently, the control unit 4 stores the calculation result (character string data: “+ 2.02000E-02V” in this example) in the storage unit 6 as the converted data D2 (step 30). Thereby, the conversion process of the pre-conversion data D1 with the value “+00020” to the post-conversion data D2 is completed. Next, the control unit 4 determines whether or not unconverted pre-conversion data D1 exists (step 22), and when it exists, executes a process of converting the pre-conversion data D1 into post-conversion data D2.

  At this time, the pre-conversion data D1 that has been converted to the post-conversion data D2 by the arithmetic processing, that is, the pre-conversion data D1 in which the corresponding value exists in each conversion table T (in this example, “+00020” For the pre-conversion data D1), the control unit 4 converts the pre-conversion data D1 into the post-conversion data D2 using each conversion table T instead of the generation processing of the post-conversion data D2 by the above arithmetic processing. Execute the process. Specifically, when there is unconverted pre-conversion data D1 (step 22) and the pre-conversion data D1 has a value of “+00020”, the control unit 4 converts the conversion target in the conversion table T1. Since the value of the record corresponding to the pre-conversion data D1 is a value other than the initial value “65535” (in this example, “02000”), the value corresponding to the pre-conversion data D1 to be converted is converted into each conversion value. It is determined that it exists in the work table T (step 23).

  Next, the control unit 4 determines the corresponding data (in this example, the value “02000”) recorded in the conversion table T1 as the value of the fractional part PMD of the mantissa part PM, and in the conversion table T2 It is searched which record range “+00020” belongs to (step 31). At this time, since the “upper limit value” is “+00020”, the lower limit value is “+00020”, and the flag is “valid”, the record of “+ (positive)” is applicable. It is determined that the integer part PMI of the mantissa part PM is “+ (positive)”. Subsequently, the control unit 4 searches in which range of records “+00020” belongs in the conversion table T3P associated with the record “+ (positive)” in the conversion table T2 (step 32). ). In this case, since the “upper limit value” is “+00020”, the lower limit value is “+00020”, and the flag is “−0”, the record is “−0”. It is determined that the first digit of PI is “−0”.

  Next, the control unit 4 searches for which record range “+00020” belongs to in the conversion table T4PM0 associated with the record “−0” in the conversion table T3P (step 33). In this case, since the “upper limit value” is “+00020”, the lower limit value is “+00020”, and the flag is “valid”, the record “−02” is applicable. The digit other than the first digit of PI is “2”, and as a result, the exponent part PI is determined to be “−02”. Subsequently, the control unit 4 searches for which record range “+00020” belongs to in the conversion table T5PM02 associated with the record “−02” in the conversion table T4PM0 (step 34). At this time, since the “upper limit value” is “+00020”, the lower limit value is “+00020”, and the flag is “valid”, the record of “+2.0” is applicable. It is determined that the integer part PMI of the part PM is “+2”.

  Next, the control unit 4 is based on the character string identified as a result of the search for each conversion table T and the code data Ds (by combining the identification result and the code recorded in the code data Ds), The result (character string: “+ 2.02000E-02V” in this example) is generated as converted data D2 (step 35), and the generated converted data D2 is stored in the storage unit 6 (step 30). Thereby, the conversion processing of the value “+00020” into the post-conversion data D2 using the conversion table T of the pre-conversion data D1 is completed.

  On the other hand, as an example, when the pre-conversion data D1 having a value of “+00999” is output from the A / D conversion unit 2, the control unit 4 has unconverted pre-conversion data D1 (step 22). It is determined that the data (value) for the previous data D1 does not exist in the conversion table T1 (step 23), and the conversion process to the post-conversion data D2 by the aforementioned arithmetic process is executed. Specifically, an arithmetic process is performed on the converted data D1 for the value “+00999” to calculate the value “+ 9.99200E-01V” as the converted data D2 (character string calculation (generation)) : Step 24). Next, the control unit 4 updates the value of the record corresponding to “+00999” in the conversion table T1 according to the operation result (“+ 9.9999E-01V” in this example) (step 25). At this time, the measuring apparatus 1 employs a configuration in which the conversion table T1 is managed with a value within the range of “00000” to “49999” as described above. Therefore, in this example in which the fractional part PMD of the mantissa part PM is “99200” within the range of “50000” to “999999” (outside the range of “00000” to “49999”), the control unit 4 is “99920”. The record corresponding to “+00999” in the conversion table T1 is updated with a value of “49200” obtained by subtracting “50000” from the value (in this example, the initial value of “65535” is changed to a value of “49200”. Overwrite).

  Subsequently, since the integer part PMI of the mantissa part PM in the calculation result is a positive integer (“+”), the control unit 4 sets the flag of the record “+ (positive)” in the conversion table T2 to “valid”. Therefore, the “upper limit value” is updated from the value “+00020” updated corresponding to the above “+00020” to the value “+00999” (update of the conversion table T2: step 26). Next, since the first digit of the exponent part PI in the calculation result is “−0”, the control unit 4 determines that the flag of the record corresponding to “−0” in the conversion table T3P is “valid”. The “upper limit value” is updated from the value “+00020” to the value “+00999” (update of the conversion table T3: step 27). Subsequently, since the value other than the first digit (lower one digit value) of the exponent part PI in the calculation result is “1”, the control unit 4 stores the record corresponding to “−01” in the conversion table T4PM0. Since the flag is “invalid”, the “upper limit value” and the lower limit value are changed from the initial value “+00000” to the value “+00999”, and the flag of the record is changed to “valid” (conversion) Update table T4: Step 28).

  Next, the integer part PMI in the mantissa part PM in the calculation result is “+9”, and the decimal part PMD of the mantissa part PM is a value within the range of “50000” to “99999” (in this example, “99200”). Therefore, since the flag of the record corresponding to “+9.5” in the conversion table T5PM01 is “invalid”, the control unit 4 changes the “upper limit value” and lower limit value from the initial value “+00000”. The value is changed to “+00999” and the flag of the record is changed to “valid” (update of conversion table T5: step 29). Thus, each conversion table T is updated so that the pre-conversion data D1 having a value of “+00999” can be converted into post-conversion data D2 having a value of “+ 9.99200E-01V”. Subsequently, the control unit 4 stores the calculation result (character string data: “+ 9.9900E-01V” in this example) in the storage unit 6 as the converted data D2 (step 30). Thereby, the conversion process of the pre-conversion data D1 with the value “+00999” to the post-conversion data D2 is completed. Next, the control unit 4 determines whether or not unconverted pre-conversion data D1 exists, and when it exists, executes a process of converting the pre-conversion data D1 into post-conversion data D2.

  At this time, when the pre-conversion data D1 having a value of “+00999” is output from the A / D conversion unit 2, the control unit 4 replaces the generation process of the post-conversion data D2 by the above arithmetic process with Using the conversion table T, a process of converting the pre-conversion data D1 to the post-conversion data D2 is executed. Specifically, when there is unconverted pre-conversion data D1 (step 22) and the pre-conversion data D1 has a value of “+00999”, the control unit 4 converts the conversion target in the conversion table T1. Since the value of the record corresponding to the pre-conversion data D1 is a value other than the initial value “65535” (in this example, “49200”), the value corresponding to the pre-conversion data D1 to be converted is It is determined that it exists in the work table T (step 23).

  Next, the control unit 4 temporarily determines the corresponding data recorded in the conversion table T1 (in this example, the value “49200”) as the value of the fractional part PMD of the mantissa part PM, and also converts the conversion table T2. Then, it is searched which record range “+00999” belongs to (step 31). At this time, since the “upper limit value” is “+00999”, the lower limit value is “+00020”, and the flag is “valid”, the record of “+ (positive)” is applicable. It is determined that the integer part PMI of the mantissa part PM is “+ (positive)”. Subsequently, the control unit 4 searches for which record range “+00999” belongs to in the conversion table T3P associated with the record “+ (correct)” in the conversion table T2 (step 32). ). At this time, since the “upper limit value” is “+00999”, the lower limit value is “+00020”, and the flag is “valid”, the record of “−0” is applicable. It is determined that the first digit of PI is “−0”.

  Next, the control unit 4 searches for which record range “+00999” belongs to in the conversion table T4PM0 associated with the record “−0” in the conversion table T3P (step 33). In this case, since the “upper limit value” is “+00999”, the lower limit value is “+00999”, and the flag is “valid”, the record of “−01” is applicable. It is determined that the digits other than the first digit of PI are “1”, and as a result, the exponent part PI is “−01”. Subsequently, the control unit 4 searches for which record range “+00999” belongs to in the conversion table T5PM01 associated with the record “−01” in the conversion table T4PM0 (step 34). In this case, since the “upper limit value” is “+00999”, the lower limit value is “+00999”, and the flag is “valid”, the record of “+9.5” is applicable, and therefore the control unit 4 has the mantissa. It is determined that the integer part PMI of the part PM is “+9”.

  Next, the control unit 4 performs conversion based on the character string specified as a result of the search for each conversion table T and the code data Ds (by combining the specific result and the code recorded in the code data Ds). Post data D2 is generated (step 35). At this time, for the decimal part PMD of the mantissa part PM, the value “49200” provisionally determined when the conversion table T1 is searched and “+9.5” of “+9.5” specified when the conversion table T5PM01 is searched. Based on the value of “0.5”, that is, “50000” when converted to the decimal part PMD, the value “49200” + “50000” = “99200” is determined and used as the final value. As a result, the value “+ 9.9999E-01V”) is generated as post-conversion data D2 corresponding to the pre-conversion data D1 having the value “+00999” (step 35), and the generated post-conversion data D2 is stored. Stored in the unit 6 (step 30).

  Thereafter, each time new pre-conversion data D1 is output from the A / D conversion unit 2 (when there is unconverted pre-conversion data D1), the control unit 4 performs post-conversion after the measurement value conversion process 20 starts. For the pre-conversion data D1 that has generated the data D2 (corresponding data exists in the conversion table T1), the above conversion processing using each conversion table T is executed, and the post-conversion data D2 is generated. For the pre-conversion data D1 that does not exist (the corresponding data does not exist in the conversion table T1), the post-conversion data D2 is generated by the arithmetic processing, and the data (value) of the corresponding record in each conversion table T is updated. As a result, for the pre-conversion data D1 that has generated the post-conversion data D2, the pre-conversion data D1 is converted into the post-conversion data D2 in a relatively short time by the above-described conversion processing using each conversion table T. For the pre-conversion data D1 for which the post-conversion data D2 has not been generated, the conversion table T is updated so that the conversion process can be executed in a short time when the same pre-conversion data D1 is output thereafter. Thereafter, the output of the pre-conversion data D1 from the A / D conversion unit 2 is completed, and when the conversion of all the pre-conversion data D1 is completed in step 22 (the state that there is no unconverted pre-conversion data D1 exists) The control unit 4 ends the measurement value conversion process 20.

  As described above, in the measurement apparatus 1, for the pre-conversion data D1 that has generated the post-conversion data D2, the conversion tables T1 to T5 are searched in order for the value of the pre-conversion data D1 to be converted. Thus, a configuration (conversion method) is adopted in which each value of the fractional part PMD of the mantissa part PM, the exponent part PI, and the integer part PMI of the mantissa part PM is sequentially identified and converted into the converted data D2. In this case, for example, the pre-conversion data D1 is converted into the post-conversion data D1 by using one type of conversion table (hereinafter also referred to as “conversion table Tx”) in which the conversion tables T2 to T5 are combined. When the configuration (conversion method) for converting to D2 is adopted, the values of the exponent part PI and the integer part PMI of the mantissa part PM are calculated because the number of records in the conversion table Tx is very large. There is a possibility that the time required for the search at the time of identification may become longer. For this reason, it takes a long time to convert each pre-conversion data D1 to post-conversion data D2. In the worst case, each pre-conversion data D1 output from the A / D conversion unit 2 is converted in real time. It may be difficult to convert the data D2.

  On the other hand, a conversion table T2 for specifying the sign of the integer part PMI of the mantissa part PM, a conversion table T3 for specifying the first digit value of the exponent part PI, and the first digit of the exponent part PI A conversion table T4 for specifying a value other than 1 and a conversion table T5 for specifying the integer part PMI of the mantissa part PM are separately provided to specify each value (conversion method). Then, the number of records in each of the conversion tables T2 to T5 is very small. Therefore, each value of the exponent part PI and the integer part PMI of the mantissa part PM is compared with the structure (conversion method) for converting the pre-conversion data D1 to the post-conversion data D2 using the conversion tables T1 and Tx. The time required for the search for specifying is very short.

  As described above, in this measurement device 1 and the measurement value conversion method by the measurement device 1, the conversion table T1 in which each value of the fractional part PMD of the mantissa part PM in the converted data D2 is associated with each pre-conversion data D1 ( A first conversion table), and a conversion table in which each value of the integer part PMI of the mantissa part PM in the converted data D2 and each value of the exponent part PI in the converted data D2 are associated with the range of the pre-conversion data D1. T2 to T5 (second conversion table) are used as measurement value conversion tables, and the conversion table T1 corresponds to the pre-conversion data D1 when the pre-conversion data D1 is converted into the post-conversion data D2 in the conversion process. First specifying process for specifying the value of the decimal part PMD of the mantissa part PM to be performed (step 23 in the measured value conversion process 20), and a conversion table A second specifying process (steps 31 to 34 in the measured value conversion process 20) for specifying the value of the integer part PMI and the exponent part PI of the mantissa part PM corresponding to the range to which the pre-conversion data D1 belongs in T2 to T5 And the post-conversion data D2 is generated based on the values specified by the both specifying processes (step 35 in the measured value converting process 20).

  Therefore, according to the measurement device 1 and the measurement value conversion method by the measurement device 1, the conversion for specifying the values of the integer part PMI and the exponent part PI of the mantissa part PM having many pre-conversion data D1 having the same value. For each table T2 to T5, by adopting a configuration that records a range of values (“upper limit value” and “lower limit value”) of the pre-conversion data D1 that have the same value, each value of the pre-conversion data D1 Compared with the conversion table configured to individually record the values of the integer part PMI and the exponent part PI of the mantissa part PM corresponding to, the data size can be made sufficiently small. Thereby, according to this measurement apparatus 1 and the measured value conversion method by the measurement apparatus 1, the total data size of the conversion tables T1 to T5 necessary for converting the pre-conversion data D1 to the post-conversion data D2 is sufficiently large. Therefore, even if the storage unit 5 has a somewhat small capacity, the conversion tables T1 to T5 can be reliably stored. For this reason, it is not necessary to mount an excessively large storage unit, so that the manufacturing cost of the measuring apparatus 1 can be sufficiently reduced.

  Further, according to the measurement device 1 and the measurement value conversion method by the measurement device 1, by generating the converted data D2 based on the value specified by the above-described both specifying processing and the code data Ds during the conversion processing. Compared with a configuration (conversion method) in which codes such as “.”, “E”, and “V” are respectively recorded in corresponding records in the conversion table T for converting the pre-conversion data D1 into the post-conversion data D2. In order to convert the pre-conversion data D1 into the post-conversion data D2 by providing these codes used in any post-conversion data D2 as code data Ds as shared data separately from the conversion table T. The total data size of the data (conversion table T and code data Ds) can be further reduced.

  Furthermore, according to the measurement value conversion method by the measurement device 1 and the measurement device 1, the conversion table T5 in which each value of the integer part PMI of the mantissa part PM in the converted data D2 is associated with the range of the pre-conversion data D1. (Third conversion table) and conversion tables T3 and T4 (fourth conversion table) in which each value of the exponent part PI in the converted data D2 is associated with the range of the pre-conversion data D1 are described above. Third specification process for specifying the value of the integer part PMI of the mantissa part PM corresponding to the range to which the pre-conversion data D1 belongs in the conversion table T5 as the second specification process used as the second conversion table And a fourth specifying process for specifying the value of the exponent part PI corresponding to the range to which the pre-conversion data D1 belongs in the conversion tables T3 and T4. Compared with the configuration (conversion method) that uses one type of conversion table that combines the conversion tables T3 to T5, the conversion table T can be converted only by searching each conversion table T with a small number of records several times. Since the value of the post-conversion data D2 corresponding to the previous data D1 can be specified, the time required to convert the pre-conversion data D1 into the post-conversion data D2 can be sufficiently shortened.

  Further, according to the measurement device 1 and the measurement value conversion method by the measurement device 1, the conversion table T3 in which each first digit value of the exponent part PI in the post-conversion data D2 is associated with the range of the pre-conversion data D1. (Fifth conversion table) and a conversion table T4 (sixth table) in which each value of the digit other than the first digit of the exponent part PI in the converted data D2 is associated with each value of the first digit of the exponent part PI. Of the exponent part PI corresponding to the range to which the pre-conversion data D1 belongs in the conversion table T3 at the time of the fourth specific processing. A fifth specifying process for specifying a value, and a sixth specifying process for specifying a value of a digit other than the first digit corresponding to the value of the first digit specified by the fifth specifying process in the conversion table T4 And that By executing, the number of each conversion table T having a smaller number of records is smaller than that of a configuration (conversion method) that uses one type of conversion table in which the conversion tables T3 and T4 are combined and the conversion table T5. Since the value of the post-conversion data D2 corresponding to the pre-conversion data D1 can be specified only by searching for the times, the time required to convert the pre-conversion data D1 into the post-conversion data D2 is further shortened. be able to.

  Further, according to the measurement value conversion method by the measurement device 1 and the measurement device 1, the first range of the pre-conversion data D1 in which the integer part PMI of the mantissa part PM is converted into post-conversion data D2 having a positive integer, The second range of the pre-conversion data D1 in which the integer part PMI of the mantissa part PM is converted to the post-conversion data D2 of a negative integer, and the pre-conversion data D1 in which the integer part PMI of the mantissa part PM is converted to the post-conversion data D2 of 0 Conversion table T3 (seventh conversion table) that can identify each of the third ranges is converted, and conversion tables T3 to T3 divided in correspondence with the respective ranges of the pre-conversion data D1 in the conversion table T2 are used. Using T5, at the time of the second specifying process described above, it is specified to which of the ranges the pre-conversion data D1 belongs based on the conversion table T2, and is associated with the specified range. By specifying the value of the integer part PMI of the mantissa part PM and the value of the exponent part PI corresponding to the range to which the pre-conversion data D1 belongs in the conversion tables T3 to T5, conversion can be performed without providing the conversion table T2. Compared to a configuration (conversion method) using a single type of conversion table T in which the conversion tables T3P and T3M are combined, the number of records in the conversion table T3 can be reduced, so that it is necessary to search the conversion table T3. The time required to convert the pre-conversion data D1 into the post-conversion data D2 can be further shortened by the amount that the time can be shortened.

  In addition, this invention is not limited to said structure. For example, in the measurement device 1 and the measurement value conversion method performed by the measurement device 1, each conversion table T is obtained by using a plurality of conversion tables T of the conversion tables T3 to T5 as second conversion tables. Although the search time for converting the pre-conversion data D1 to the post-conversion data D2 using is reduced, the number of conversion tables T constituting the second conversion table is not limited to this.

  Specifically, as an example, each conversion table T3 in which each first digit value of the exponent part PI is associated with the range of the pre-conversion data D1, and each digit value other than the first digit of the exponent part PI. Is provided with one type of conversion table T (fourth conversion table: not shown) in which the above conversion tables T4 associated with the range of the pre-conversion data D1 are associated with each other, and conversion tables T3, T4 Instead, it is possible to employ a configuration in which the pre-conversion data D1 is converted into post-conversion data D2 using the fourth conversion table. By adopting such a configuration, compared with the configuration using the conversion tables T1 to T5, the time required for the search during the conversion process to the converted data D2 using the conversion table T is little. However, the total data size of all the conversion tables T can be further reduced.

  Also, one type of conversion table T (second conversion table: not shown) in which the conversion tables T3 to T5 are collected is provided, and this second conversion table is used instead of the conversion tables T3 to T5. It is also possible to adopt a configuration in which the pre-conversion data D1 is converted into post-conversion data D2 by using. By adopting such a configuration, the time required for the search during the conversion process to the converted data D2 using the conversion table T is longer than that in the configuration using the conversion tables T1 to T5. However, the total data size of all the conversion tables T can be further reduced.

  Further, in the measurement apparatus 1 described above, after the measurement processing for the input signals S1 and S2 is started (when it is necessary to convert the pre-conversion data D1 to the post-conversion data D2), the conversion to the post-conversion data D2 For the pre-conversion data D1 having no value, a configuration is adopted in which post-conversion data D2 is obtained by arithmetic processing and the corresponding record of each conversion table T is updated based on the arithmetic result, but the input signal S1 , S2 prior to the start of the measurement process, all the conversion tables T are generated in advance, and when converting the pre-conversion data D1 into the post-conversion data D2, the conversion table T The structure which produces | generates the corresponding post-conversion data D2 using can be employ | adopted.

  Even in such a configuration and the measurement value conversion method using the conversion table T, the values for the integer part PMI and the exponent part PI of the mantissa part PM having many pre-conversion data D1 having the same value are specified. For each of the conversion tables T3 to T5, each value of the pre-conversion data D1 is recorded by adopting a configuration in which the range of values (“upper limit value” and “lower limit value”) of the pre-conversion data D1 that is the same value is recorded The data size can be made sufficiently small as compared with the conversion table configured to individually record the integer part PMI and the exponent part PI of the mantissa part PM corresponding to each. As a result, the total data size of the conversion tables T1 to T5 necessary for converting the pre-conversion data D1 into the post-conversion data D2 can be made sufficiently small. In addition, the conversion tables T1 to T5 can be reliably stored. For this reason, since it is not necessary to mount an excessively large capacity storage unit, the manufacturing cost of the measuring apparatus can be sufficiently reduced.

DESCRIPTION OF SYMBOLS 1 Measuring apparatus 2a, 2b A / D conversion part 3 Display part 4 Control part 5,6 Memory | storage part 20 Measurement value conversion process D1 Data before conversion D2 Data after conversion Ds Code data Dt Table data for conversion PI Exponential part PM Mantissa part PMD Fractional part PMI Integer part PS1 to PS3 Code part S1, S2 Input signal T1, T2, T3P, T3M, T4PP0 to T4PP2, T4PM0 to T4PM2, T4MP0 to T4MP2, T4MM0 to T4MM2, T5PP00 to T5PP29, T5PM01 to T5PM29, T5MP00 to T5MP29 , T5MM01 to T5MM29 Conversion table

Claims (6)

A storage unit that stores a measurement value conversion table for converting a plurality of measurement values before conversion into converted measurement values in an exponential display format, and each of the measurement values before conversion based on the measurement value conversion table. A measurement value conversion device comprising a conversion processing unit for executing a measurement value conversion process for converting into converted measurement values,
The storage unit includes, as the measurement value conversion table, a first conversion table in which each value of the mantissa part of the converted measurement value is associated with the measurement value before conversion, and the measurement after conversion. A second conversion table that associates each value of the integer part of the mantissa part in the value and each value of the exponent part in the converted measurement value with the range of the measurement value before conversion, and
When the conversion processing unit converts the pre-conversion measurement value into the post-conversion measurement value during the conversion processing, the conversion processing unit includes a decimal part of the mantissa part corresponding to the measurement value before conversion in the first conversion table. A first specifying process for specifying a value, and a second specifying the integer part value and the exponent part value of the mantissa part corresponding to the range to which the measurement value before conversion belongs in the second conversion table. The measurement value conversion apparatus which performs the specific process and generates the post-conversion measurement value based on the value specified by the two specific processes. The storage unit stores the decimal point, the exponent symbol, and the unit symbol in the measurement value after conversion as code data separately from the two conversion tables,
The measurement value conversion apparatus according to claim 1, wherein the conversion processing unit generates the post-conversion measurement value based on the value specified by the both specifying processes and the code data during the conversion process. The storage unit, as the second conversion table, a third conversion table in which each value of the integer part of the mantissa part in the converted measurement value is associated with the range of the measurement value before conversion, Storing a fourth conversion table in which each value of the exponent part in the measured value after conversion is associated with the range of the measured value before conversion;
In the third conversion table, the conversion processing unit specifies a value of an integer part of the mantissa part corresponding to the range to which the measurement value before conversion belongs in the third conversion table. And a fourth specifying process for specifying a value of the exponent corresponding to the range to which the measurement value before conversion belongs in the fourth conversion table, respectively. apparatus. The storage unit, as the fourth conversion table, a fifth conversion table in which each first digit value of the exponent part in the converted measurement value is associated with the range of the measurement value before conversion; A sixth conversion table that associates each value of the digit other than the first digit of the exponent part in the measurement value after conversion with each value of the first digit of the exponent part;
In the fourth specifying process, the conversion processing unit specifies the first digit value of the exponent part corresponding to the range to which the pre-conversion measurement value belongs in the fifth conversion table. And a sixth specifying process for specifying a digit value other than the first digit corresponding to the first digit value specified by the fifth specifying process in the sixth conversion table. The measured value conversion apparatus according to claim 3, which is executed respectively. The storage unit includes a first range of the pre-conversion measurement value in which the integer part of the mantissa part is converted to the post-conversion measurement value of a positive integer, and the post-conversion of the integer part of the mantissa part being a negative integer. A second range of the measurement value before conversion to be converted into a measurement value and a third range of the measurement value before conversion to be converted into the measurement value after conversion in which the integer part of the mantissa is 0 can be specified. 7 conversion tables, the second conversion table is divided and stored in association with the respective ranges of the pre-conversion measurement values in the seventh conversion table,
In the second specifying process, the conversion processing unit specifies to which of the ranges the measurement value before conversion belongs based on the seventh conversion table and corresponds to the specified range. 5. The integer part value and the exponent part value of the mantissa part corresponding to the range to which the pre-conversion measurement value belongs are respectively specified in the attached second conversion table. 5. The measured value conversion device described. A measurement value conversion method for converting a plurality of pre-conversion measurement values into post-conversion measurement values in an exponential display format based on a measurement value conversion table,
As the measurement value conversion table, a first conversion table in which each value of the decimal part of the mantissa part in the converted measurement value is associated with the measurement value before conversion, and a mantissa part in the measurement value after conversion A second conversion table in which each value of the integer part and each value of the exponent part in the converted measurement value are associated with the range of the measurement value before conversion is used, and the measurement value before conversion is measured after the conversion. A first specifying process for specifying a value of a fractional part of the mantissa part corresponding to the measurement value before conversion in the first conversion table, and in the second conversion table, A second specifying process for specifying the value of the integer part of the mantissa part and the value of the exponent part corresponding to the range to which the measurement value before conversion belongs, and based on the values specified by the two specifying processes, Strange Measured value conversion method of generating a rear measurements.

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