JP2003202263A - Unlighted street light detecting device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an unlighted street light detecting device capable of reducing a cost, improving reliability of a photoelectric sensor in comparison with a street light of a detecting object and reducing erroneous detection. <P>SOLUTION: This unlighted street light detecting device comprises the photoelectric sensor 22 for measuring the intensity of light from the street light of the detecting object through an electronic shutter 21, a CPU 23 for outputting an electronic shutter control signal to the electronic shutter 21 to which the output from the photoelectric sensor 22 is supplied, a reference LED1 24 mounted at a photoelectric sensor 22 side of the electronic shutter 21 and receiving the reference LED1 flashing signal outputted from the CPU 23, a reference LED2 25 mounted at a detected street light 12 side of the electronic shutter 21, and receiving the reference LED2 flashing signal outputted from the CPU 23, and a wireless modem 26 for transmitting a lighting condition of the detected street light 12 connected to the CPU 23. <P>COPYRIGHT: (C)2003,JPO

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a system for automatically detecting the non-lighting of a street light, which is low-cost, highly reliable, and has high detection accuracy. The present invention relates to a road lamp non-lighting detection device. 2. Description of the Related Art Heretofore, non-lighting of street lights has been visually inspected by an inspector. [0003] However, when a number of street lights installed along the road are visually inspected by an inspector, many people are required. [0004] As a method of detecting the non-lighting of the street light, there is generally considered a method in which the illuminance from the detected street light is measured by a photoelectric sensor to determine whether the light is turned on or off. However, this method has the following problems. [0006] The sensitivity of the photoelectric sensor changes depending on the temperature. Therefore, the illuminance determination level differs depending on the season. [0007] Rain on the front glass of the photoelectric sensor,
The illuminance from the street light is reduced due to dirt from snow, birds, insects, and the like, and it cannot be determined whether the street light is broken or the photoelectric sensor is poorly maintained. The reliability of the photoelectric sensor is lower than the reliability of the street light to be detected. SUMMARY OF THE INVENTION The present invention has been made in view of the above circumstances, and has a low cost, a photoelectric sensor having higher reliability than a street light to be detected, and an erroneous detection. An object of the present invention is to provide a street light non-lighting detection device with a small number. [0010] In order to achieve the above object, a street light non-lighting detection device according to the present invention comprises: a photoelectric sensor for measuring illuminance from a detected street light via an electronic shutter; CPU that receives an output from a photoelectric sensor and outputs an electronic shutter control signal to the electronic shutter
(Central processing unit: Central Processin
g Unit) and a reference LE provided on the photoelectric sensor side of the electronic shutter and output from the CPU.
D (Light emitting diode: Light Emitted D)
a reference LED 1 to which a blinking signal is supplied, a reference LED 2 provided on the side of the street lamp to be detected of the electronic shutter and supplied with a reference LED 2 blinking signal output from the CPU, and a CPU connected to the CPU. And a wireless modem for transmitting a lighting state of the detected street light. A self-inspection function is added to the photoelectric sensor, and the self-inspection of the photoelectric sensor is performed each time it is determined that the detected street light is not lit. The photoelectric sensor is calibrated by the reference light source LED1 which is more reliable than the detected street light, and the operation of the photoelectric sensor is checked by the reference light source LED2 in front of the front glass surface of the photoelectric sensor to detect dirt on the front glass of the photoelectric sensor. After the photoelectric sensor is calibrated, the detected street light is cut off. Embodiments of the present invention will be described below in detail with reference to the drawings. FIG. 1 is a side view showing a street light provided with a street light non-lighting detection device according to an embodiment of the present invention, FIG. 2 is a perspective view showing an example of the solar cell of FIG. 1, and FIG. Figure 1)
FIG. 3 is a side view showing an example of a street light non-lighting detection device of FIG.
(B) is a front configuration diagram showing an example of the street light non-lighting detection device of FIG. 1, FIG. 4 is a configuration explanatory diagram showing an example of the street light non-lighting detection device of FIG. 1, and FIG. 5 is an embodiment of the present invention. It is explanatory drawing which shows operation | movement of the photoelectric sensor self-check function which concerns on FIG. That is, as shown in FIG. 1, a substantially L-shaped street light pole 11 is planted on the ground, and a street light 12 is provided at the tip of the street light pole 11. A solar cell 13 and a streetlight non-lighting detection device 14 are attached to an intermediate portion of the streetlight pole 11. As shown in FIG. 2, the solar cell 13 is formed in a sheet shape and can be attached regardless of the orientation. As shown in FIG. 3, the streetlight non-lighting detection device 14 includes a photoelectric sensor 22 such as a CdS (cadmium sulfide) sensor for measuring the illuminance from the detected streetlight 12 through an electronic shutter 21, and a photoelectric sensor 22. An output from the sensor 22 is supplied, and a CPU (Central Processing Unit: Cent) that outputs an electronic shutter control signal to the electronic shutter 21
ral Processing Unit) 23 and the electronic shutter 21 provided on the photoelectric sensor 22 side.
Reference LED (light emitting diode:
Light Emitted Diode (1) 24 reference LEDs 1 to which a blink signal is supplied, and an electronic shutter 2
The 25 reference LEDs 2 provided on the side of the detected street light 12 and supplied with the reference LED 2 blinking signal output from the CPU 23, and the reference street lights 12 connected to the CPU 23
Wireless modem 26 for transmitting the lighting state of
6 and an battery 27 for supplying power as a power source. As shown in FIG. 4, the photoelectric sensor 22 measures the illuminance from the detected street light 12 via the electronic shutter 21, and the output of the photoelectric sensor 22 is an amplifier (AMP).
It is amplified at 29 and taken into the CPU 23. CPU23
From the electronic shutter control signal
And the reference LED1 blinking signal is 24 reference LEDs
1 and the reference LED 2 blink signal is 25 reference LEs
D2. Further, the CPU 23 is connected to the wireless modem 26 and can transmit the lighting state of the detected street light 12 in response to a request. The battery 28 is charged by the solar cell 13 and supplies power to each unit. As a self-check function of the photoelectric sensor 22,
The photoelectric sensor 22 performs the following series of operations. Calibration: The photoelectric sensor 22 is shielded from light by the electronic shutter 21, and 24 reference LEDs are provided inside the case.
1 is used to calibrate the photoelectric sensor 22. This allows C
The temperature characteristics of the dS sensor 22 are corrected. Dirt determination: The photoelectric sensor 22 is calibrated by 25 reference LEDs 2 provided outside the photoelectric sensor 22 (outside the front glass surface). From this, it is determined whether the front glass of the photoelectric sensor 22 is dirty or the detected street light 12 is not lit. Measurement: The illuminance of the street light 12 to be detected is measured by the photoelectric sensor 22. As described above, a series of operations performed by the photoelectric sensor 22 are performed at appropriate intervals (once an hour) to correct errors due to contamination of the front glass of the photoelectric sensor 22 and temperature, and to detect the street light 12 to be detected. No light or photoelectric sensor 22
Can be determined. The operation of the self-inspection function of the photoelectric sensor 22 is shown in FIG. 1. Calibration of the photoelectric sensor 22: The electronic shutter 21 is closed and the photoelectric sensor 22 is calibrated by the 24 reference LEDs 1. The illuminance level at the temperature at the time of measurement can be corrected, and the characteristics of the photoelectric sensor 22 due to aging can be corrected. The CPU 23 corrects the determination level by referring to the photoelectric sensor voltage contrast table. In the case of malfunction, it is determined that the photoelectric sensor 22 is abnormal. 2. Dirt detection: The electronic shutter 21 is opened, and the illuminance of the 25 reference LEDs 2 is measured by the photoelectric sensor 22. At this time, if the front glass of the photoelectric sensor 22 is not dirty, 24 reference LEDs 1 and 25 reference LEs are used.
Since D2 is the same LED, the level of the front glass of the photoelectric sensor 22 attenuated by the transmission attenuation rate (about 15%) + the street light to be detected. If it is below this level, it is determined that the front glass of the photoelectric sensor 22 is dirty. 3. Measurement: The reference LED 1 of 24 and the reference LED 2 of 25 are turned off, and the photoelectric sensor 22 measures the light of the street lamp 12 to be detected. The illuminance of the detected street light 12 is C
The determination is made by the PU23. The life of the street light 12 to be detected is 5,000 hours. Here, the reliability of the photoelectric sensor 22 is designed to secure 500,000 hours or more by using the latest power-saving electronic components, and sufficient reliability is obtained. The solar cell 13 employs a sheet-type solar cell, and has no power supply and a simple installation method irrespective of the mounting orientation to achieve aesthetics and maintenance-free. Normal solar cells are flat and must be installed facing south where the sun passes to obtain maximum power. In the present invention, by employing a sheet-type solar cell, it is possible to install the solar cell 13 around the street light pole 11. This contributes to the beauty of the city,
Since the system is not installed on the road, danger of falling can be prevented and installation can be performed regardless of the mounting direction. As described above, according to the present invention, the provision of the self-check function of the photoelectric sensor causes the photoelectric sensor to malfunction, the detected street light to turn off, or the maintenance of the photoelectric sensor to fail. Thus, it is possible to automatically check many detected street lights installed along the road with relatively few personnel. Moreover, it can be realized at a relatively low cost.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a side view showing a street light provided with a street light non-lighting detection device according to an embodiment of the present invention. FIG. 2 is a perspective view showing an example of the solar cell of FIG. 3A is a side view showing an example of the street light non-lighting detection device of FIG. 1, and FIG. 3B is a front view showing an example of the street light non-lighting detection device of FIG. FIG. 4 is a configuration explanatory view showing an example of a street light non-lighting detection device of FIG. 1; FIG. 5 is an explanatory diagram showing an operation of a photoelectric sensor self-check function according to the embodiment of the present invention. [Description of Signs] 12 Detected street light 14 Street light non-lighting detection device 21 Electronic shutter 22 Photoelectric sensor 23 CPU 24 Reference LED1 25 Reference LED2 26 Wireless modem 27 Antenna 28 Battery

Continuation of front page    F term (reference) 2G065 AA03 AB04 AB16 AB27 AB28                       BA02 BA10 BB21 BC14 CA21                       CA23 CA25 CA29 DA05 DA15                 3K073 AA13 AA28 AA34 AA93 BA28                       CA05 CB06 CC25 CD08 CE17                       CF02 CF13 CJ17 CJ23 CJ24                       CK01

Claims (1)

Claims: 1. A photoelectric sensor for measuring illuminance from a detected street light via an electronic shutter, and an output from the photoelectric sensor is supplied, and an electronic shutter control signal is output to the electronic shutter. A CPU that is provided on the photoelectric sensor side of the electronic shutter;
A reference LED1 to which a reference LED1 blinking signal output from the CPU is supplied; and a reference LED1 provided on the detected streetlight side of the electronic shutter;
A streetlight non-lighting device comprising: a reference LED2 to which a reference LED2 blinking signal output from the CPU is supplied; and a wireless modem connected to the CPU and transmitting a lighting state of the detected streetlight. Detection device.