JPH10208887A - Operation monitor of electric-electronic equipment - Google Patents

Abstract

PROBLEM TO BE SOLVED: To sharply reduce labor, and reduce the cost without going to a job site where electric-electronic equipments are installed by almost simultaneouly monitoring ON/OFF conditions of a large number of electric-electronic equipments in a remote place. SOLUTION: An optical fiber distributed temperature sensor 1 is incorporated in series into two or more electric-electronic equipments 2, and is contacted with or made closely adjacent to a device 3 causing heating in the respective electric-electronic equipments 2, and operational conditions of the respective electric-electronic equipments 2 can be almost simultaneously monitored from positional information and temperature information of the individual electric- electronic equipments 2 obtained by its optical fiber distributed temperature sensor 1. The degradation and abnormality of the respective electric-electronic equipments 2 can be monitored from its temperature information.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a device for monitoring the operation (ON, OFF), deterioration and abnormalities of a large number of electric and electronic devices, which can be remotely monitored almost simultaneously. For example, the present invention can be used for remote monitoring of electronic devices distributed over a wide range, such as communication devices of a network system, and various electric and electronic devices such as lighting equipment at an airport or a highway.

[0002]

2. Description of the Related Art The operating states of stationary electric and electronic devices such as personal computers, printers, optical amplifiers, lightings on highways and airports, measuring and control devices having electric and electronic functions, and various communication devices. The confirmation, that is, the confirmation of whether the power of those devices is ON or OFF, is performed by visually observing a power lamp, for example, a light emitting display such as an LED, provided in the electric / electronic device. Is common. In addition, the state of the power switch of these devices, that is, the power switch is ON
In general, a method of visually confirming which of the side and the OFF side has fallen is also performed. In the case of lighting fixtures such as lighting lamps and guide lights, there is usually no dedicated display for displaying ON / OFF, and thus a method of visually observing light emission of the lighting lamp itself has been adopted.

[0003]

These confirmation methods have the following problems. (1) When going to the site where electric and electronic equipment is installed and checking it, the monitoring work is difficult. (2) In the method of checking with a light guide or a video monitor, it is not necessary to go to the site, but since the monitoring is performed by human eyes, the judgment may be erroneous. (3) In the case of lighting and guidance lights installed in wide areas such as expressways and airports, the number of monitoring lights to be monitored is as large as hundreds to thousands, and is installed over a wide area. However, such confirmation requires a great deal of labor and time, and contributes to high costs. In addition, maintenance and repair of electric / electronic devices are also difficult. (4) In the method of directly checking the status of the switch, the nameplate indicating the status of the switch is unclear, and the determination may be erroneous or the determination may be unclear.
It is difficult to monitor with high accuracy. (5) In the method of visually observing the light emission of the lamp itself,
For example, it is easy to make a determination that it is difficult to confirm depending on the brightness of the room where the lighting is installed.

[0004]

SUMMARY OF THE INVENTION An object of the present invention is to solve the above-mentioned drawbacks of the conventional method of checking the state of a power supply, and to provide a dedicated power supply without having to go to a site where electric / electronic equipment is installed. An object of the present invention is to provide a power supply monitoring device capable of easily and reliably monitoring a power supply state without a display, and capable of determining deterioration or abnormality of an electric or electronic device.

In order to achieve the above object, an operation monitoring apparatus for an electric / electronic device according to the present invention, as shown in FIG. 1, incorporates an optical fiber distributed temperature sensor 1 into two or more electric / electronic devices 2 in a series. Then, each electric / electronic device 2 is brought into contact with or approaching a device 3 which generates heat in each electric / electronic device 2, and each electric / electronic device is obtained from position information and temperature information of each electric / electronic device 2 obtained by the optical fiber distributed temperature sensor 1. The operation state of the electronic device 2 can be monitored almost simultaneously. Further, it is possible to monitor the deterioration and abnormality of each electric / electronic device 2 from the temperature information.

[0006]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the operation monitoring apparatus for electric / electronic equipment according to the present invention will be described with reference to FIG. 1 is an optical fiber distribution type temperature sensor capable of measuring the temperature distribution around the optical fiber from the intensity of backscattered light from the optical fiber, 2 is an electric / electronic device, 3 is accompanied by heat generation in the electric / electronic device 2 Device. The optical fiber distribution type temperature sensor 1 is incorporated in a series of electric / electronic devices 2 to be monitored, and a light emitting element in each electric / electronic device 2
It is in contact with or in proximity to a device 3 that generates heat, such as a power transistor or a transformer. 3 shown in FIG.
Electrical / electronic equipment 2 on the right
Is an optical transmitter including a semiconductor laser, and the two electric / electronic devices 2 on the left side are optical amplifiers. The optical fiber distribution type temperature sensor 1 incorporated in the optical transmitter at the right end is an optical amplifier. The optical fiber distributed temperature sensor 1 incorporated in the optical transmitter at the right end is a circuit board (a device that generates heat) in the optical amplifier.
3, heat generated from each device 3 is detected by the optical fiber distribution type temperature sensor 1.

The electric / electronic equipment 2 according to the present invention includes information processing equipment such as a personal computer and a printer,
Optical amplifiers, electric amplifiers, lighting lights, road lights, street lights, guide lights, measuring and control equipment that uses electrical and electronic functions, various communication devices such as routers, modems, switching devices, transmission / reception devices, etc. It includes all installed electric and electronic devices such as display boards and various broadcasting devices.

[0008]

【Example】

(Embodiment 1) One optical transmitter including the semiconductor laser shown in FIG. 1 and two optical amplifiers are operated simultaneously, and one optical fiber (optical fiber distributed temperature sensor) 1 is introduced into the housings of those devices. In the optical transmitter, the optical fiber distribution type temperature sensor 1 is in contact with the amplifier of the drive current circuit of the semiconductor laser, and in the optical amplifier, it is in contact with the voltage converter of the drive current circuit of the excitation semiconductor laser and the heat sink of the excitation laser. Then, the temperatures of these devices were monitored by the optical fiber distribution type temperature sensor 1.

The total length of the optical fiber is about 60 m, an optical transmitter is installed at a position about 40 m from the temperature observation end, and an optical amplifier is installed at a point about 2 m away from the optical transmitter, and about 8 m from the optical amplifier.
The following optical amplifier was installed at a remote location (about 50 m from the temperature observation end).

The optical fiber distribution type temperature sensor 1 shown in FIG.
The temperature distribution around the optical fiber can be measured from the intensity of the backscattered light from the optical fiber, and is configured by combining a backscattered light meter (OTDR) and an optical fiber. The position information and the temperature information of each electric / electronic device 2 are obtained by measuring and analyzing the intensity of the backscattered light due to the Raman scattering when the laser light enters the optical fiber from the laser light source. If the intensity of the backscattered light is constant, it is in a normal state, and if the intensity changes beyond a preset threshold, an abnormality occurs in the electric / electronic device 2 and a temperature change occurs in the device 3 which generates heat in the device. Judge that it has occurred.

When the intensity of the backscattered light from the optical fiber distribution type temperature sensor 1 is analyzed with a spectrum analyzer, the result is plotted as shown in FIG. 2, and the operating state of each electric / electronic device 2 can be confirmed. . From FIG. 2, it was confirmed that when the power switch of the optical amplifier was turned off, the temperature signal disappeared (decreased) several tens of seconds later, and the operation of the optical amplifier was turned off.

As an actual application example of the operation monitoring apparatus for electric / electronic devices according to the first embodiment, the operation state of various electric / electronic devices in a system in which the devices are widely distributed, such as a network system or a communication device, is described. It is conceivable to monitor remotely.

(Embodiment 2) Using the optical fiber distribution type temperature sensor 1, the operation state of the illuminating lamp (power switch ON, O
FIG. 3 shows an example in which FF) was observed. In this embodiment, the illumination lamp is a spotlight, and an optical fiber distribution type temperature sensor 1 is introduced into each spotlight 2. The temperature near the surface of the illuminating lamp reaches 60 to 100 ° C. or more, and the optical fiber distribution type temperature sensor 1 can secure a sufficiently strong temperature signal in a temperature range that can be easily measured. Can be monitored and does not impair lighting performance.

FIG. 4 shows the intensity of the backscattered light obtained by the optical fiber distribution type temperature sensor 1 with time on the horizontal axis. Each peak corresponds to each spotlight. FIG. 4A shows a state where all the lights are turned on. In FIG. 4 (a), it was confirmed that no intensity was observed at a position corresponding to illumination # 3, at which scattered light was supposed to be large, and that illumination # 3 was not turned on.

In this embodiment, observation was possible even when the distance between two adjacent lamps was within 3 m. Also, since a sufficiently strong temperature signal can be secured,
Observation is possible even at a distance of m. Therefore, if the distance between adjacent lamps is set to about several meters, it is possible to perform temperature observation of nearly 1,000 lamps with one optical fiber distributed temperature sensor 1 and to provide a wide-area lighting device. Can be monitored almost simultaneously and economically. Further, as a result of the experiment, it was found that when the illumination lamp deteriorated, the average temperature within a predetermined time decreased. Therefore, it was also found from the observation of the average temperature that not only ON / OFF but also the deterioration state of the illumination lamp can be monitored. From this, it is possible to monitor an abnormal state when the temperature of the electric / electronic device 2 excessively rises by setting a threshold value for abnormality determination as shown in FIG.

As an actual application example of the operation monitoring apparatus for electric / electronic equipment according to the second embodiment, one or several temperature distribution type optical fiber sensors are installed in a large number of lightings installed in a wide place such as an airport. , The lighting and non-lighting of each illumination lamp may be remotely monitored from the position information and the temperature information observed at one end of the optical fiber.

[0017]

The operation monitoring apparatus for electric / electronic equipment according to the present invention has the following effects. (1) Since the ON / OFF state of a large number of electric / electronic devices can be monitored almost simultaneously at a remote location, there is no need to go to the site where the electric / electronic devices are installed, resulting in significant labor saving and cost reduction. Reduction becomes possible. (2) Since the monitoring is performed electrically or optically, not visually, there is almost no erroneous judgment. (3) Since the optical fiber is used for detecting the operation of the electric / electronic device, the monitored device is not adversely affected by the electric and does not malfunction. (4) Since the optical fiber has low loss, the detection data can be transmitted over a long distance, and remote monitoring is possible. (5) Based on the temperature information,
Deterioration or abnormality of the electronic device can also be determined.

[Brief description of the drawings]

FIG. 1 is an explanatory diagram showing an example of an operation monitoring device for an electric / electronic device according to the present invention.

FIG. 2 is an explanatory diagram of a detection monitor by the operation monitoring device of the electric / electronic device of FIG.

FIG. 3 is an explanatory view showing another example of the operation monitoring device for electric / electronic equipment of the present invention.

FIG. 4 is an explanatory diagram of a detection monitor by the operation monitoring device of the electric / electronic device in FIG. 3;

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Optical fiber distribution type temperature sensor 2 Electric and electronic equipment 3 Device which generates heat

Claims (3)

[Claims] An optical fiber distribution type temperature sensor is incorporated in a series of two or more electric / electronic devices, and is brought into contact with or close to a device which generates heat in each of the electric / electronic devices. An operation monitoring device for an electric / electronic device capable of substantially simultaneously monitoring the operation state of each electric / electronic device from position information and temperature information of each electronic / electronic device obtained by a distributed temperature sensor. 2. The operation monitoring device for an electric / electronic device according to claim 1, wherein deterioration or abnormality of each electric / electronic device 2 can be monitored from the temperature information. 3. The operation monitoring device for an electric / electronic device according to claim 1, wherein the two or more electric / electronic devices 2 are lighting devices such as a lighting lamp and a guide light installed over a wide area.