JP2002202158A - Recording device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain a recording device capable of capturing detailed data at high-speed recording sampling periods at rainfalls without performing recording during unnecessary periods except the times of rainfalls. SOLUTION: The recording device for recording the measured values of physical quantities on events which irregularly occur comprises an event detecting means for determining the occurrence and completion of the events, and a recorder for recording the physical quantities during the duration of the events on the basis of the determination of the event detecting means.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a recording device for recording a measured value of a physical quantity relating to an irregularly occurring event.

[0002]

2. Description of the Related Art The operation of a recorder used in a water supply and sewage system is usually continuous recording, and a recording medium such as a recording paper of the recorder is replaced by a maintenance manager during patrol monitoring. The recording paper replacement cycle is about once a month, and a shorter replacement cycle is not preferable in terms of maintenance costs.

In a rainwater pumping station, a rainwater reservoir, a rainwater regulating pond, and the like, the equipment does not operate except during rainfall, so it is desired to record only during rainfall. But,
In general, the maintenance manager is unable to constantly monitor the weather, and may not be stationed at the aircraft station, so that continuous recording is generally performed.

Further, in order to set the recording medium exchange cycle to about once a month, it is necessary to lengthen the data collection cycle. For this reason, the collected records have many unnecessary recording periods other than during the rainfall, and the recording data during the rainfall period, which is essential, has a long sampling cycle, and detailed data cannot be obtained.

According to the present invention, an unnecessary period other than a rainfall period is not recorded, and a recording sampling period at the time of rainfall is shortened.
It is an object of the present invention to realize a recording device capable of capturing detailed data.

[0005]

In order to achieve the above object, a feature of the present invention according to claim 1 of the present invention is to provide a recording apparatus for recording a measured value of a physical quantity relating to an irregularly occurring event. It has an event detecting means for judging the occurrence and end of the event, and a recorder for recording the physical quantity during the duration of the event based on the judgment of the means.

A feature of the present invention is that the event detecting means monitors a change rate of the measured value of the physical quantity, and determines that an event has occurred when the change rate is equal to or more than a predetermined value, and that the event has ended when the change rate is equal to or less than a predetermined value. On the point.

[0007] A feature of the present invention is that the event is rainfall.

[0008]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a conceptual diagram of the recording apparatus of the present invention.
1 is a measured value V of a physical quantity related to an irregularly occurring event.
It is a recorder that records i. 2 is the power PW to the recorder 1
Switch means for interrupting the supply of power.

Reference numeral 3 denotes an event detecting means for judging the occurrence of an irregularly occurring event, for example, the occurrence and termination of rainfall. Based on the judgment output C of the event detecting means, the switch means 2 is turned on only during the continuation of the event, the power PW is supplied to the recorder 1, and the recording of the measured value Vi of the physical quantity is executed.

FIG. 2 is a flowchart showing a processing routine of the apparatus of the present invention. In this example, the event detecting means determines the start of rainfall by detecting the count of the rain gauge, and determines the end of rainfall by determining that the count stop has continued for a certain period of time. Further, regarding the stop of the equipment, it is determined that a series of operation of the equipment at the time of rainfall has been completed and the equipment has returned to the initial state.

When the processing routine is started, the start of rain is checked in a first step S1, and if it is not rain, it returns to its original state. If it is rain, the recording start signal of the recorder is turned on in a second step S2.

At the next next third step S3, the end of the rain is checked. If not, the recording is continued. If the end of the rain is reached, the process proceeds to the next fourth step S4, and the stop of the equipment is checked.

If the equipment is not stopped in the check in step S4, the recording is continued. If the equipment is stopped, the process proceeds to a fifth step S5, where the recording start signal of the recorder is turned off, and the process returns to the start of the processing routine.

Another embodiment of the present invention will be described with reference to FIGS. This embodiment is characterized in that the start of rainfall is detected by the rate of change in water level. In FIG. 3, reference numeral 4 denotes a regulating pond shown in cross section, 5 denotes rainwater flowing in due to rainfall, and 6 denotes a level meter of the rainwater in the regulating pond.

Li is a value measured by the level meter 6 and is input to the change rate calculator 7, where the change rate Li ′ is calculated and input to the alarm setter 8. The alarm setting device 8 transmits a recording control signal C of the recorder when the change rate Li ′ exceeds the specified value H.

FIG. 4 is a flowchart showing a processing routine in the embodiment of FIG. In this example, the event detection means determines that the start of rain is determined by the change rate Li ′ exceeding the specified value H, and the end of rain is determined by the cow change rate Li ′ being equal to or less than the specified value H. to decide. Further, regarding the stoppage of the equipment, it is determined that the series of operation of the equipment at the time of rainfall is completed and the equipment returns to the initial state as in FIG.

When the processing routine starts, in a first step S1, the start of rainfall is checked according to the rate of change. If it is not raining, it returns to its original state. If it is raining, the recording start signal of the recorder is turned on in a second step S2. .

At the next next third step S3, the end of rain is checked based on the change rate. If not, the recording is continued. If the end of rain is reached, the process proceeds to the next fourth step S4, and the stop of the equipment is checked. You.

If the equipment is not stopped in the check in step S4, the recording is continued. If the equipment is stopped, the processing proceeds to the fifth step S5, the recording start signal of the recorder is turned off, and the processing routine returns to the start.

In the embodiment described above, the case of rain as an event occurring irregularly has been described. However, the present invention can be effectively applied to other irregular events without being limited to rain. It is.

[0021]

As is apparent from the above description,
According to the present invention, the following effects can be obtained. (1) By recording at the time of equipment operation during rainfall, it is not necessary to record data of an unnecessary period. (2) When the exchange period of the recording medium is the same, the data sampling period can be shortened by limiting the recording period. For example, assuming that rainfall is one day in five days, the ampling cycle can be reduced to one fifth.

[Brief description of the drawings]

FIG. 1 is a conceptual diagram of the recording apparatus of the present invention.

FIG. 2 is a flowchart showing a processing routine of the apparatus of the present invention.

FIG. 3 is a sectional view of a regulating pond showing another embodiment of the present invention.

FIG. 4 is a flowchart showing a processing routine in FIG. 3;

[Explanation of symbols]

 1 Recorder 2 Switch means 3 Irregular event detection means

Claims (3)

[Claims] 1. A recording apparatus for recording a measured value of a physical quantity relating to an irregularly occurring event, an event detecting means for judging the occurrence and termination of the event, and a continuation of the event based on the judgment of the means. A recording apparatus comprising a recorder for recording the physical quantity during a period. 2. The event detecting means monitors a rate of change of the measured value of the physical quantity, and determines that an event has occurred when the rate of change is equal to or greater than a predetermined value, and that the event has ended when the rate of change is equal to or less than a predetermined value. 2. The recording device according to 1. 3. The recording apparatus according to claim 1, wherein said event is rainfall.