JPH02207384A - Device and system for recording data - Google Patents

Abstract

PURPOSE:To shorten the recording cycle of data only for a necessary period by thinning out a measured value, which is recorded for each prescribed cycle, during the normal period, recording the measured value to a storage part and recording the measured value, which is recorded for each prescribed cycle, to the storage part as it is when a control signal is inputted. CONSTITUTION:A measurement circuit 1 is provided to measure physical quantity for each prescribed cycle and a first storage part 5 is provided to record this measured value. Then, the measured value of the physical quantity is recorded to this first storage part 5 for each cycle, which is determined in advance, with being replaced with the old measured value. Then, the measured value for each prescribed time is selected out of the first storage part 5 and recorded to a second storage part 10. When the control signal is outputted, measured value data in the first storage part 5 are transferred to the second storage part 10 as they are. Thus, when the control signal is outputted, the physical quantity is changed in the shorter cycle than a normal time and the detailed data can be obtained.

Description

Detailed Description of the Invention (a) Industrial Application Field The present invention measures physical quantities such as temperature, pressure, flow rate, voltage, current, and power at predetermined intervals, and uses these measured values to The present invention relates to a data recording device configured to record data in a memory.

(b) Conventional technology As a conventional technology of a device that periodically and automatically collects and records physical data such as temperature, pressure, humidity, displacement, crustal strain, and weather changes,
As seen in Publication No. 2, it includes a sensor that detects a physical quantity, a converter that converts the physical quantity from the sensor into digital data, and an interrupt terminal that receives a signal from a clock at each set cycle set on the keyboard. A microprocessor that records digital data in a storage element for each signal received by the microprocessor is known.

(8) Problems to be Solved by the Invention In such conventional data recording devices, physical quantities are measured at a preset cycle.0 Normally, immediately before an event occurs (when an abnormal change in a physical quantity occurs), the physical quantity is measured at a short cycle. Although it is desirable to record data and analyze changes in physical quantities in detail, it is necessary to shorten the data recording cycle.

However, in this case, unless the capacity of the data storage section is sufficient, data cannot be recorded for a necessary period of time. That is, there is a problem in that when the data recording period is shortened, the capacity of the storage section increases.

At the same time, there is a problem in that the recording cycle is short and the period that is not required is also short, resulting in unnecessarily large amounts of data being recorded.

In view of these problems, the present invention provides a data recording method that can shorten the data recording cycle only for a necessary period.

(D) Means for Solving the Problems The present invention measures physical quantities such as temperature, pressure, flow rate, voltage, current, and power at predetermined intervals, and records the measured values. The data recording device includes a measurement circuit that measures the physical quantity at predetermined intervals, a first storage section having a plurality of areas for recording the measured values, and a first storage section that stores the oldest measurement value recorded in the first storage section. a first recording control unit that records the latest measurement value measured by the measurement circuit after outputting; a first recording control unit that records the latest measurement value measured by the measurement circuit;
The count value includes a third recording control unit that causes the second storage unit to sequentially record the old measurement values output at the time of the count every predetermined number of times, and the measurement values in the first storage unit to the second storage unit. It is something that

Further, a measurement circuit that measures the physical quantity at every predetermined period;
and a first storage section having a plurality of areas for recording the measured values, and each time the measurement circuit measures a physical quantity, it outputs the oldest recorded value in the first storage section and then records this new measured value. , further counts the number of times this old measured value is output, and records the measured values in the first storage unit in the second storage unit in order every predetermined number of times when the old control signal that was output at the time of counting is input. This was done in a similar way.

Furthermore, it includes a measurement circuit that measures the physical quantity at predetermined intervals, and an input circuit that inputs a measurement stop signal, so that the recording cycle of measurement data in the semiconductor memory from the input of the measurement stop signal to a predetermined time before is controlled. The period is shorter than the recording period at other times.

(*) Effect When using the data collection method configured in this way, during a normal period, physical quantities measured at preset intervals (every predetermined number of outputs of old data output from the first storage unit) are collected. is recorded in the second storage section, and when a control signal is input, the measured values that have been recorded every predetermined period are recorded as they are in the second storage section. That is, when a control signal is input, measured values can be recorded in the second storage section at a shorter cycle than in normal times.

(F) Embodiments Hereinafter, embodiments of the present invention will be explained based on the drawings. FIG. 1 is an explanatory diagram showing the main parts of a data collection device in blocks. 1 is an A/D (analog/digital) conversion circuit;
A detector for a physical quantity to be measured is connected to the terminals A I and A *. The measured value of the detected physical quantity is output from this detector as an analog voltage, and the terminals A r and A
Applied to *. Terminal S is a terminal for starting A/D (analog/digital) conversion, and every time a signal is applied to this terminal, the analog voltage applied to terminals AI and At is converted into digital data and output from the terminal. and holds the output until the next A/D conversion is performed. Terminal F is a terminal that outputs an A/D conversion end signal, and outputs a signal when the digital data outputted to the terminal F has been updated. 2 is a first timing generation circuit, and a clock circuit 3 (in this embodiment, it always outputs year, month, day, hour, minute, and second data from the terminal, and also outputs a clock for counting every second from the terminal). A clock from a clock outputted from C is input from terminal C, and every time the count value of this clock reaches a predetermined value N, A/D conversion is started from terminal S to terminal S of A/D converter 1. Output a signal.

Note that this predetermined value N is set by the first measurement interval (period) setter 4.
For example, it is set to 1≦N≦3600 (period of 1 second to 1 hour). Reference numeral 5 designates a first storage unit which stores the digital data (year, month, day, hour, minute, second time data output from the clock circuit) that is applied to the terminal when a signal is applied to the terminal F. (combined with the measured value data output from the A/D converter) is stored.

FIG. 2 is an explanatory diagram showing the state of the storage areas in the first storage section 5. The storage section is divided into areas M, to Mn, and each area is large enough to store the digital data. When the count value N is 1, it is appropriate that n is less than 60, but it may be arbitrarily set to 120 when the count value N is 1. 7 is an output control section, and a signal is sent to the terminal F. When given, the data stored in area Mn is transferred to area M, and then this data is output from the terminal and held. 6 is an input control unit which, when a signal is given to the terminal F, inputs the data given to the terminal RI to the area MA for timing, and controls the area Mn.
-1 data is transferred to area Mn. That is, after sequentially shifting all the data in the area, the data in area MA is transferred to area M, which has become empty. 8 is the second
This timing generation circuit counts the number of times the signal is output from the terminal S of the first timing generation circuit, and when this count value reaches the number N determined by the second measurement interval setting device 9, the signal is output from the terminal S. A signal is output from F. Note that the output of this signal is delayed by a certain period of time in consideration of the operating time of the A/D converter and the operating time of the first storage section. Further, when a signal is applied to the terminal T, signals are sequentially outputted from the terminal F0, and all contents recorded in all areas in the first storage section 5 are sequentially outputted to the second storage section &. By applying a signal to the terminal f of the second storage unit 10, the data being applied to the terminal D0 is recorded. This recording capacity is sufficiently larger than the capacity of the first storage unit 5. For example, it is sufficient that the capacity is sufficient to record data within the measurement period of the physical quantity when using this device. 11 is a data readout circuit. By applying a signal to the terminal S of the second storage section 10, the data recorded in the second storage section 10 is read out and displayed on the display section, printed on paper, etc., or sent to another personal computer or computer. It is used to output data to analytical equipment such as Furthermore, the second storage unit 10 may be made into a recording medium that is separable from the apparatus, such as a floppy disk, a card body or casing having a semiconductor memory, printing on paper, etc. to improve portability.

12 is an input circuit, which inputs an external control signal (a signal when an abnormality occurs in a physical quantity measurement object or a signal when a failure occurs in this device) from terminal R, and inputs a control signal from the terminal S to this device. Input the measurement start signal. 13 is a flip-flop circuit, and normally there is no signal output from terminal Q;
When the input circuit 12 inputs the control signal, the first
A signal is output to each terminal T of the timing generation circuit 2 and the second timing generation circuit 8. Note that when the second timing generation circuit 8 receives a signal from the terminal T, it outputs a signal to the terminal S of the flip-flop circuit 14. This flip-flop circuit 14 outputs a signal to the data reading circuit 11 and the alarm display circuit 15. Alarm display circuit 15
In response to the signal, the LED 16 is turned on to indicate an abnormality.

FIG. 3 is an explanatory diagram showing the main operations of the data recording device configured as described above. First, in step S, it is determined whether the measurement time has been reached, and when the measurement time has been reached, the process proceeds to step S. In this step S, time data is added to the measured physical quantity data to create a series of measured data, and the data is stored in the first storage unit 5 in an endless method (if new data is input when there is no free space in the storage capacity, the oldest data will be deleted and new data will be created). (replace with data). After this, proceed to step S, and the number of data that can be erased in step S (
It is determined whether the number of times new data is inputted has reached N, and when the number of times new data has been inputted has reached N, the data to be erased is recorded in the second storage unit 10.

Also step S.

Then, it is determined whether or not there is a control signal, and if there is a control signal, the process proceeds to step S. In step S, all data in the first storage section is transferred to and recorded in the second storage section.

(g) Effects of the Invention The data recording device configured as described above includes a measurement circuit that measures a physical quantity at every predetermined period, and a first storage section that records the measured value, and stores data at every predetermined period. The measured value of the physical quantity is recorded in this first storage section while replacing the old measured value, and the measured value every predetermined number of times is selected from the first storage section and recorded in the second storage section, and a control signal is output. When the measured value data in the first storage section is transferred to the second storage section, the physical quantity data is normally recorded in the first storage section every (predetermined period)/1/(predetermined number of times). When the control signal is output, the measurement data in the first storage section can be recorded in the second storage section at a predetermined period. That is, detailed data on changes in physical quantities up to the output of the control signal can be obtained in a shorter period than in normal times.

[Brief explanation of the drawing]

FIG. 1 is an explanatory diagram showing the main parts of a device using an embodiment of the present invention in blocks, FIG. 2 is an explanatory diagram showing the state of the storage area of the first storage section shown in FIG. 1, and FIG. 2 is an explanatory diagram showing the main operations of the apparatus shown in FIG. 1. FIG. 2...First timing generation circuit, 5...First
Storage unit, 8... second timing generation circuit,
10...Second storage section.

Claims (3)

[Claims] (1) In a data recording device configured to measure physical quantities such as temperature, pressure, flow rate, voltage, current, and power at predetermined intervals, and record the measured values, the physical quantities are recorded at every predetermined interval. a first storage section having a plurality of areas for recording the measurement values; and a measurement circuit that measures the latest measurement value after outputting the oldest measurement value recorded in the first storage section. a first recording control unit that records a value, and a second recording unit that counts the number of times the old measurement value is output and causes the second recording unit to sequentially record the old measurement value that was output at the time of counting every predetermined number of times. 1. A data recording device comprising: a second recording control section; and a third recording control section that causes measured values in the first storage section to be recorded in the second storage section in order from the oldest to the oldest when a control signal is input. (2) In a data recording device configured to measure physical quantities such as temperature, pressure, flow rate, voltage, current, and power at predetermined intervals and record the measured values, the physical quantities are recorded at every prescribed interval. and a first storage section having a plurality of areas for recording the measured values, and each time the measurement circuit measures a physical quantity, the oldest recorded value in the first storage section is output. This new measurement value is recorded, and the number of outputs of this old measurement value is counted, and this count value causes the measurement values that were output at this counting time to be sequentially recorded in the second storage section every predetermined number of times, and the control signal is A data recording method characterized in that the measured values in the first storage section are sequentially recorded in a second storage section at the time of input. (3) In a data recording device configured to measure physical quantities such as temperature, pressure, flow rate, voltage, current, and power at predetermined intervals and record the measured values in a semiconductor memory, a measurement circuit that measures the physical quantity; and an input circuit that inputs a signal to stop measurement; A data recording method characterized by a period shorter than the period.