JPH07324950A - Recording apparatus of measured value - Google Patents

Abstract

PURPOSE:To obtain a recording apparatus in which a missed measurement in a measured value is interpolated by detecting the missed measurement from a recorded value in a counter value, and estimating the counter value in a time in which the missed measurement is generated, from a plurality of counter values near the time and in different times. CONSTITUTION:A region in which a measuring-time interval is set, e.g. at 15 minutes and in which nine counter values covering two hours 15 minutes are stored, is formed in a memory, a recording operation is recorded at intervals of 15 minutes, and latest nine counter values are always stored. Then, when a counter value in a previous operation (before 15 minutes) is not rewritten, it is regarded as a missed measurement, and a missed-measurement mark is written. For example, a missed measurement exists in a counter value in a previous time to on the hour, a counter value Ca in the latest time before the previous time to on the hour and its time ta are extracted and the time T1 between to and after the previous time on the hour exists and its counter value Cb, are extracted, a counter value in a previous time on the hour is computed from T1, T2, Ca, Cb, and it is written as a counter value at to i.e., (h) hour 00 minute.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a measurement value recording device for recording various measurement values in a building management system, a factory management system and the like.

[0002]

2. Description of the Related Art In a building management system, a factory management system, etc., in order to manage the flow rate and electric power of fluids such as liquids and gases, means for measuring various variables and obtaining measured values are provided and set in advance. These measured values are sequentially recorded at time intervals, for example, as a daily report or monthly report.

For example, when measuring the amount of electric power or the flow rate, a pulse oscillator, in which the number of pulses generated per unit time is proportional to the amount of electric power or the flow rate, is attached to the measurement position of the measurement target, and the terminal device performs the pulse The pulse signal generated by the oscillator is received and counted, and the monitoring control device provided in the center reads each count value from each terminal device, for example, every hour, and the difference from the previously read count value The integrated value for one hour is calculated, and the electric energy and the flow rate at every hour are recorded as a tabular daily report.

[0004]

However, in such a conventional measurement value recording device, the monitoring control device determines the count value in the terminal device due to abnormality or noise in the transmission line between the terminal device and the monitoring control device. If it is not possible to read it temporarily or for maintenance and inspection of the monitoring control device,
If the operation is temporarily stopped, the measured value will be lost. When such a missing measurement value occurs,
This will hinder the management of the amount of electricity and the flow rate, and the recorded results such as daily reports will be incomplete.

An object of the present invention is to provide a measurement value recording apparatus which solves the above-mentioned problems by automatically supplementing the measurement value when the measurement value is missing for some reason.

[0006]

[Means for Solving the Problems] Generally, in a building management system, a factory management system, etc., the amount of electric power and the flow rate do not fluctuate abruptly. There is no big difference. Therefore, it is possible to estimate the measured value at the time when the loss occurs relatively accurately from the fluctuation transition of the measured value for a plurality of times in the vicinity of the time when the loss occurs in the measured value. The present invention utilizes such a property.

According to a first aspect of the present invention, there is provided a measurement value recording apparatus for measuring a variable of a measurement object at predetermined measurement time intervals, and a measurement value obtained by the measurement means. In a measurement value recording device equipped with measurement value recording means for sequentially recording at each time interval, a measurement value loss detecting means for detecting loss of the measurement value from the recorded content of the measurement value, and a time at which the loss of the measurement value occurs Measured value estimation means for estimating the measured value from the measured values of a plurality of times at different times in the vicinity of the time, and the measured value at the time when the measured value is deficient in the value obtained by the measured value estimating means. And a measurement value complementing means for recording as.

According to a second aspect of the present invention, there is provided the measurement value recording apparatus according to the first aspect, wherein the measurement time interval is shorter than the recording time interval.

According to a third aspect of the present invention, there is provided the measurement value recording apparatus according to the first or second aspect, wherein the plurality of measurement values are two times at different times in the vicinity of the time when the measurement value is defective. The measurement value estimating means is an interpolating method or an extrapolation method based on the time from the time when the deficiency occurs in the measurement value to the measurement time of the two measurement values and the two measurement values. It is characterized in that the measured value is calculated by.

[0010]

In the measured value recording apparatus according to the first aspect, the measuring means measures the variable of the measuring object at each predetermined measuring time interval, and the measured value recording means presets the measured value obtained by the measuring means. Recording is performed sequentially at each recording time interval. The measurement value loss detecting means detects the loss of the measurement value from the recorded content of the measurement value, and the measurement value estimating means outputs the measurement value at the time when the loss of the measurement value occurs at a plurality of times near the time and at different times. Estimate from the measured value of. Then, the measurement value complementing means records the value obtained by the measurement value estimating means as the measurement value at the time when the measurement value has a defect. Due to such an action, even if the measured value is lost due to some reason in the recorded content of the measured value, the missing measured value is inferred from the measured values of a plurality of times measured near the time when the missing occurs, It is automatically supplemented and the measured value recording result with no missing measured value is obtained.

In the measurement value recording apparatus according to the second aspect, the measurement time interval is set shorter than the recording time interval. For example, if the measurement time interval is 15 minutes and the recording time interval is 1 hour,
The measurement is performed every 15 minutes, and the recording is performed every hour (for example, every hour on the hour). However, when the measurement value at a certain hour has a defect, it is near the time (for example, 15 minutes). Since it is estimated from the previous measured value and the measured value after 15 minutes, the measured value at the time when the defect occurs can be more accurately estimated in response to the fluctuation of the measured value in a shorter time than the recording time interval. be able to.

In the measurement value recording apparatus according to the third aspect, the measurement values for two times at different times in the vicinity of the time at which the measurement value is lost and for the two times from the time at which the measurement value is lost are measured. The measurement value is estimated by the interpolation method or the extrapolation method depending on the time until the measurement time of the value.

For example, the time at which the measurement value is lost is to, the measurement value at time ta before that time to is Ca, the measurement value at tb after to is Cb, and T1 = to-ta T2 = tb If -to is set, the measured value Co at the time when the defect occurs is

Is calculated by the interpolation method.

Further, for example, the time at which the measurement value is lost is defined as to, and two different times t before the time to
If the measured values at a and tb are Ca and Cb and T1 = to-ta and T2 = to-tb, the measured value Co at the time when the defect occurs is

Is calculated by the extrapolation method.

[0017]

1 to 5 show the construction of a measurement value recording apparatus according to an embodiment of the present invention.

FIG. 1 is a block diagram showing the configuration of an equipment management system such as a building management system and a factory management system. In FIG. 1, pulse oscillators 11a, 11b ... 1
1c and 12a, 12b ... 12c are respectively attached to predetermined measurement points, and generate pulse signals in which the number of generated pulses per unit time is proportional to the variable of the measurement target such as electric energy or flow rate. The terminal devices 21 and 22 receive pulse signals generated by a plurality of pulse oscillators and count the number of pulses for each pulse oscillator. The monitoring control device 4 is provided in the center of a monitoring room or the like, and the terminal devices 21, 2
An optical fiber cable 3 connects the two.
The monitoring control device 4 reads each count value in the plurality of terminal devices 21 and 22 at predetermined measurement time intervals. Then, the integrated value of the measurement time interval (the number of increments of the counter value in the measurement time interval) is calculated from the difference between the previously read counter value and the current counter value, and the predetermined measurement target such as the electric energy or the flow rate is calculated. This integrated value is multiplied by a proportional constant indicating the relationship between the variable and the integrated value to obtain the amount of electric power and the flow rate at each measurement point.

FIG. 2 is a block diagram showing the configuration of the supervisory control device 4 shown in FIG. In FIG. 2, the CPU 31 executes a program previously written in the memory and a program loaded from the hard disk to the memory, and controls the entire supervisory control device. The memory 32 is an R in which a program such as an initial program loader is written in advance.
It consists of OM and RAM used as various working areas. FDC 33 is a floppy disk drive device 34
To control the reading and writing of data from and to the floppy disk. The HDC 35 controls the hard disk device 36. The transmission control circuit 37 performs data transmission with the terminal devices 21 and 22 shown in FIG. 1 via the optical fiber cable 3. The key controller 38 performs key input control by operating the key input device 39. The printer controller 40 controls printing for the printer 41.
The display controller 42 controls display on the display device 43. The clock circuit 44 clocks the current date and time. The CPU 31 performs the processing for every 15 minutes and the processing for each hour, which will be described later, based on the timekeeping of the clock circuit 44.

FIG. 3 is a diagram showing a storage example of the counter value at each measurement point stored in the memory 32 shown in FIG. In this example, the measurement time interval is 15 minutes and 2 hours 15
By providing an area for storing the counter value for 9 times over a minute, the counter value of 2 hours and 15 minutes before is erased at each measurement time, and the new count value of this time is stored, so that the latest 9 The count value for each batch is stored. 3A is an example in which all the counter values for 9 times are normally stored, and FIG. 3B is a case where the counter values at hh 00 and hh 15 are missing (hereinafter referred to as " This is an example of "missing".

FIG. 4 is a flow chart of the CPU 31 shown in FIG.
Processing for each minute (the digits of the current time are "00", "15",
It is a flow chart which shows the contents of processing performed at the time of "30" and "45". First, the counter value counted by the terminal device at each measurement point is read (n1). Subsequently, the previously stored counter value of 2 hours 15 minutes ago is erased, and the counter value read this time is newly written together with time information (n2 → n3). By this processing, the latest nine counter values are always saved. Then, it is determined whether or not the previous counter value (that is, 15 minutes before) is written (n4). If the counter value has not been written previously, that is, if it is missing, a code indicating the missing mark is written in the storage area of the previous counter value (n4 → n).
5). The presence / absence of the missing measurement is determined based on whether or not the difference between the time when the new counter value is newly written this time and the time when the counter value is previously written is 15 minutes. For example,
If the time when the previous count value was written is h00, and the time when the current count value was written is h: 30, it is considered that the previous time was a missing measurement, and the previous count value write area is displayed. Write the missing mark code. Further, as in the example shown in FIG. 3B, if the time when the previous count value is written is (h-1) hour 45 minutes and the time when the current count value is written is h: 30. , It is considered that the previous time and the time before the last time were missing, and the codes of the missing marks are written in the count value writing areas of the time before the last time and the time before the last time respectively.

FIG. 5 is a flow chart showing the processing contents of the CPU 31 shown in FIG. 2 for each hour. If it is on the hour, check if the last hour (time to) was missing.
It is determined whether or not the code of the missing mark is written in the storage area of the counter value at the previous hour on the hour (n11). If the counter value at the previous hour on the hour is missing, the count value Ca and the time ta at the latest time before the previous hour on the hour are extracted (n
12). In the example shown in FIG. 3B, at (h-1) hour 45
Minutes are extracted as time ta, and the counter value C-1 at that time is extracted as Ca. If there is no counter value corresponding to this, the process is terminated as it is (n13 → end). After that, the time between time to and ta is obtained as T1 (n14), and then the time at which the first counter value after the last hour is present is t.
b, the counter value is extracted as Cb (n15).
In the example shown in FIG. 3B, h: 30 is set as time tb and the counter value C2 is extracted as Cb. If there is no corresponding counter value, the subsequent processing is not performed (n16 → end). After that, the time between the times tb and to is obtained as T2 (n17). Then, the estimated counter value Co at the last hour on the previous hour is calculated from T1, T2, Ca, and Cb, and this is written as to, that is, the counter value of h00 (n18). Specifically, by the above formula (1), C
Calculate o.

In the example shown in FIG. 5, the estimated count value at the time of the missing is calculated by the interpolation method based on the count values before and after the time when the missing occurs. It may be calculated by the extrapolation method as shown in the above formula (2) based on the count value of two times before or after the time.

In the embodiment, the integrated value of the count value of each measurement point read from the terminal device in the measurement time interval corresponds to the "measured value" obtained by the measuring means according to claim 1 of the present invention. However, the values of electric energy and flow rate obtained by multiplying the integrated value of this count value by a predetermined proportional constant are temporarily stored as the “measured value” according to claim 1 of the present invention, and the measured value It is also possible to perform the same processing for the defect of No. to complement the measured value.

[0025]

According to the measured value recording apparatus according to the first aspect of the present invention, even if the recorded contents of the measured values are lost for some reason, the measured values are measured in the vicinity of the time when the missing occurs. The missing measurement value is inferred from the measured values of multiple times and is automatically supplemented, and the measurement value recording result with no missing measurement value is obtained. As a result, even if there is a loss in the measured value due to an abnormality or noise in the transmission line between the terminal device and the supervisory controller, or due to a temporary suspension of its operation for maintenance and inspection of the supervisory controller, There will be no problems in managing the amount and flow rate, and the recorded results such as daily reports will be complete.

According to the measurement value recording apparatus of the second aspect,
The measured value at the time when the defect occurs can be more accurately estimated in response to the fluctuation of the measured value in a shorter time than the recording time interval.

According to the measured value recording apparatus of the third aspect,
A relatively accurate measured value can be calculated by a simple calculation based on a small number of measured values.

[Brief description of drawings]

FIG. 1 is a block diagram showing a configuration of an equipment management system to which a measurement value recording apparatus according to an embodiment of the present invention is applied.

FIG. 2 is a block diagram showing a configuration of a supervisory control device 4 in FIG.

FIG. 3 is a diagram showing a storage example of counter values at each measurement point stored in a memory 32 shown in FIG.

4 is a flowchart showing a processing procedure of a CPU 31 shown in FIG. 2, and is a diagram showing processing contents performed every 15 minutes.

5 is a flow chart showing a processing procedure of a CPU 31 shown in FIG. 2, and is a diagram showing processing contents performed at every hour.

[Explanation of symbols]

 3-optical fiber cable

Claims (3)

[Claims] 1. A measurement means for measuring a variable to be measured at each predetermined measurement time interval, and a measurement value recording means for sequentially recording the measurement values obtained by this measurement means at each predetermined recording time interval. In a measurement value recording device provided, a measurement value loss detecting means for detecting a loss of the measurement value from the recorded contents of the measurement value, and a measurement value at the time when the loss of the measurement value occurs, at different times near the time. A measurement value estimating means for estimating the measurement values from a plurality of times of measurement values, and a measurement value complementing means for recording the value obtained by the measurement value estimating means as the measurement value at the time when the measurement value is defective. Measurement value recording device. 2. The measurement value recording apparatus according to claim 1, wherein the measurement time interval is shorter than the recording time interval. 3. The measured values of the plurality of times are measured values of two times at different times in the vicinity of the time when the measured value has a defect, and the measured value estimating means has a defect of the measured value. The measurement value recording apparatus according to claim 1, wherein the measurement value is calculated by an interpolation method or an extrapolation method based on a time from a time to a measurement time of the measurement values of the two times and the measurement values of the two times.