JPH11195182A - Alarming system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To detect the symptom of a fire or the fault of an equipment at an early stage, to monitor an architectural dead angle part and to specify an abnormal place by utilizing an optical fiber as a temperature sensor. SOLUTION: An optical fiber temperature sensor can be placed also at a place making the dead angle at a present fire sensor. Namely, it is possible to monitor a fire at each rack shelf which is not watched yet presently at a stereoscopic automatic warehouse. In addition, it is possible to monitor a cable rack and to directly measure the temperature of oil within an oil pit. In addition, it is possible to measure detailed temperature distribution within a tank within an air conditioning duct and various kinds of ducts. In addition, the optical fiber temperature sensors are installed at the main places of facility equipments such as machine tools, air conditioning devices, a refrigerator, various kinds of pumps to measure a temperature trend to detect the symptom of the fault of the equipment as early as possible.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention belongs to the technical field of alarm systems applied to production research facilities such as factories and laboratories.

[0002]

2. Description of the Related Art Production research facilities such as factories and research laboratories are the center of business activities for the manufacturing industry, and suffer a great deal of damage in the event of an outage due to a fire. Become. Also, due to the spread of production management systems for parts and intermediate products that span multiple companies, as represented by the Kanban system, damage to production research facilities is affected not only by one company but also by the activities of many related companies. Will have an effect.

On the other hand, the disaster prevention system of a production research facility which is far more dangerous than a general office, such as handling fire, combustibles, explosives, etc., has been delayed, and an immediate response is desired. The most effective measure is to find signs of danger factors such as fires and equipment failures at an early stage, but there are the following problems at present.

(A) Fire countermeasures Although automatic fire alarm systems complying with the Fire Service Law have been installed,
It is not a sufficient measure from the following points.

[0005] Since many production facilities have large ceilings, there is a high possibility that a fire has already progressed when the fire detector is activated.

[0006] In places where there is a lot of dust, smoke detectors cannot be used, and warnings are given by heat detectors, which delays the discovery of fires.

The number of production facilities operating unattended for 24 hours is increasing, and it is not possible to expect a role of early detection of abnormal situations by visual inspection of workers, and it is also impossible to expect primary measures such as initial fire extinguishing.

[0008] Special equipment such as a three-dimensional automatic warehouse has been introduced, and the number of cases in which combustible materials and the like are stored at a high density has increased, and even if a fire detector installed on the ceiling surface is activated, It is difficult to identify the fire source in the three-dimensional automatic warehouse because the visibility is poor and there are many blind spots.

(B) Countermeasures for Equipment Failures Periodic maintenance and maintenance work are performed on building equipment and production equipment, but these are not sufficient measures from the following points.

[0010] Since the operation is performed at fixed time intervals such as once or twice a year, it cannot be said that the actual operation time of the device or the aging is taken into account.

In many cases, a method of monitoring abnormal sounds, smells, vibrations, and the like during operation by an operator on a daily basis has been adopted as a means for grasping a precursory phenomenon of a failure. There is also a high possibility of overlooking.

SUMMARY OF THE INVENTION The present invention solves the above-mentioned conventional problems, and detects a sign of a fire or equipment failure at an early stage, enables monitoring of architectural blind spots, and specifies an abnormal part. It is an object of the present invention to provide an alarm system that can perform the alarm.

[0013]

For this purpose, an alarm system according to the present invention lays an optical fiber in a facility to be monitored for fire and equipment to be monitored for temperature, and uses an optical fiber to control the temperature of each location and each equipment. Is detected.

[0014]

Embodiments of the present invention will be described below with reference to the drawings. 1 and 2 show an embodiment of an alarm system according to the present invention. FIG.
FIG. 2A is a configuration diagram of a sensing system, and FIG. 2B is a diagram illustrating an alarm set temperature for each monitoring target.

In FIG. 1, a factory / production line is provided with a sensing system composed of an optical fiber, and a central monitoring room processes and processes temperature information collected by the temperature measuring device from the sensing system. A central system (personal computer) that provides accurate information, and a building management system and a production management system connected to the central system are provided.

The present invention is characterized in that an optical fiber is used as a temperature sensor. This optical fiber temperature sensor can measure every 1m with an accuracy of 1 ° C, can grasp the temperature of a wide range in detail, and can efficiently monitor hundreds or thousands of temperatures over a maximum of 10km. Since it does not receive electromagnetic induction, it has the characteristic that it can measure the temperature accurately and can measure the temperature in places where fire is restricted.

As shown in FIG. 2 (A), the optical fiber temperature sensor can be disposed in a blind spot in a current fire detector. In other words, it is possible to monitor the fire of each rack shelf, which is currently unwatched in a three-dimensional automatic warehouse, and also to monitor high-voltage cable racks,
Further, it is possible to directly measure the temperature of the oil in the oil pit, and it is also possible to measure the detailed temperature distribution in the tank in the air conditioning duct and various tanks. In particular, since there is a high risk of fire such as oil pits and various tanks, explosion-proof and corrosion-resistant properties are required. Therefore, it is possible to monitor points where a fire detector has been difficult to mount in the past with the same optical fiber temperature sensor.

In addition, an optical fiber temperature sensor is installed at a main part of equipment such as machine tools, air conditioners, refrigerators, and motors such as various pumps, and a temperature trend is measured to detect a sign of equipment failure as soon as possible. It is possible to do. In addition, by measuring the exhaust gas temperature, the drain liquid temperature, and the like, it is possible to monitor the operation status of the device without directly contacting the monitoring target.

From the optical fiber temperature sensor, temperature information for each monitored object is sent to the central system. FIG. 2 (B)
As shown in (1), since the temperatures that indicate the abnormality are different from each other, the upper and lower limit temperatures are set by a personal computer, and when this value is exceeded, an alarm signal is transmitted to the administrator. However, some monitoring targets include production equipment such as machine tools, air conditioners,
In many cases, such as refrigerators, the temperature changes depending on the operating conditions. Therefore, by connecting to a production management system or a building management system and receiving an on / off signal, the upper and lower limit set temperatures can be dynamically changed.

[0020]

As is apparent from the above description, according to the present invention, it is possible to detect a sign of abnormality as soon as possible by constantly monitoring the temperature trend of the object. Further, in the conventional sensor, spot-like monitoring is performed. However, a monitoring area having a wide area can be set for a place where monitoring is to be focused. Further, it is possible to monitor a portion which is a blind spot in the conventional sensor, such as inside a double floor, behind a ceiling, inside a duct, inside a pit, and the like.
In the past, an abnormal location was specified for each sensor monitoring zone. However, it is possible to directly specify a location or target where an abnormality or a precursor thereof has occurred. In the past, dedicated sensors were required depending on the physical properties (solid, liquid, and gas) to be monitored, but a single sensor can be used. In addition, for important monitoring targets, a pre-warning is output when a suspicious sign is detected by setting the upper and lower limit temperatures of each of the two stages, thereby calling attention of the manager. Furthermore, unlike conventional sensors that send an alarm signal only when an abnormal situation occurs, it can be used in a wide range of normal times, such as monitoring indoor temperature, diagnosing equipment deterioration due to temperature changes, and preventive maintenance. Become.

[Brief description of the drawings]

FIG. 1 is a system configuration diagram showing one embodiment of an alarm system of the present invention.

FIG. 2A is a configuration diagram of a sensing system, FIG.
(B) is a diagram showing an alarm set temperature for each monitoring target.

Claims (1)

[Claims] 1. An alarm system, comprising: laying an optical fiber at a place of a facility to be monitored for fire and a facility to be monitored for temperature, and detecting the temperature of each place and each facility by the optical fiber.