JP2010103201A - Solar power generating apparatus and vehicle sensing device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a solar power generating apparatus capable of following the sun with simple structure without requiring electric power, and to provide a vehicle sensor with the same. <P>SOLUTION: A solar power generating apparatus has: a plurality of solar cell panels 401 and 402 arranged to open and close freely like a hinge; and an opening and closing means 403 that opens and closes the solar cell panels 401 and 402 by changing shape in response to solar light. A deformation member such as a spring of shape-memory alloy or the like is provided as the opening and closing means 403 at a receiving position of sunlight, and the opening and closing means 403 is operated by sunlight. Thereby, an angle of direction of the solar cell panels is changed. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a solar power generation device and a vehicle sensing device that operates by receiving power from the solar power generation device.

  The vehicle sensing device is used to check traffic such as traffic and occupancy. The vehicle sensing device senses a vehicle on the road and sends the sensing result to a signal controller or a traffic control center. Traffic volume can be obtained from this sensing result. As a vehicle sensing device, for example, an ultrasonic sensor is well known.

  The ultrasonic sensor uses a so-called active sensor that emits an ultrasonic wave and senses a reflected wave. The ultrasonic sensor transmits the ultrasonic wave toward the road and detects the time difference between the reflected wave from the vehicle and the reflected wave from the road returning to detect the vehicle.

As a vehicle sensor, an infrared sensor as described in Patent Document 1 is also known. The infrared sensor uses an infrared sensor that is a passive sensor. The vehicle is sensed by the difference between the vehicle temperature obtained by the infrared sensor and the road surface temperature. The infrared sensor can reduce power consumption compared with a sensor using an active sensor such as an ultrasonic sensor. For this reason, the infrared sensor can be supplied with electric power from a power transmission line, and can also use a power source such as a solar power generation device.
JP 2003-317186 A

  In a solar power generation device, in order to stably obtain desired power, a mechanism or a circuit for tracking the sun by dynamically controlling the azimuth angle and further the elevation angle of a solar cell panel may be provided. However, the tracking mechanism and circuit become large and consume a lot of power for tracking.

  The present invention has been made in view of such problems in the conventional technology, and a solar power generation apparatus capable of tracking the sun with a simple configuration and without requiring electric power, and the sunlight. It is an object of the present invention to provide a vehicle sensing device provided with a power generation device.

  In order to achieve the above-mentioned object, the present invention includes a plurality of solar cell panels arranged in a hinge-like manner that can be opened and closed, and an opening / closing means that opens and closes the plurality of solar cell panels by receiving and deforming sunlight. A solar power generation apparatus comprising: (Claim 1).

  In this solar power generation device, a plurality of solar cell panels are arranged in a hinge shape, and each solar cell panel is directed in a different direction. Further, the solar cell panel is opened and closed by the opening and closing means receiving sunlight. For this reason, according to the position change of the sun, sunlight can be efficiently received by at least one of the solar battery panels. And since an opening-and-closing means receives sunlight and deform | transforms, electric power is not required in order to change the direction of a solar cell panel. Therefore, the solar power generation apparatus can track the sun with a simple configuration and without requiring power.

  In a preferred embodiment of the present invention, the opening / closing means has a deformation member that is installed at a position for receiving sunlight and deforms by heat, and changes the opening / closing angle between the plurality of solar cell panels by deformation of the deformation member. (Claim 2). The deformable member can be deformed by utilizing at least one of deformation of the shape memory alloy, volume change of the sealed gas, and deformation of the bimetal (Claim 3). With a simple configuration in which a shape memory alloy spring or the like is installed at a position to receive sunlight, the solar cell panel can be opened and closed without requiring electric power.

  In the solar power generation device, each of the plurality of solar cell panels is installed at a substantially vertical elevation angle, and the azimuth angle of the solar cell panel is changed by opening and closing the plurality of solar cell panels using an opening / closing means. Good (Claim 4). This makes it possible to adjust the azimuth angle of the solar cell panel with a simple configuration and without requiring power, and as a result, it is possible to stably secure a desired power generation amount. In addition, since each solar panel is installed at a substantially vertical elevation angle, even when the solar power generation device is installed in a heavy snowfall area or a heavy snowfall area, snowfall adheres to the surface of the solar panel and snowfalls on the solar panel. It can suppress that power generation efficiency falls.

  According to another aspect, the present invention provides a vehicle sensing device comprising the above-described solar power generation device and a vehicle detector that operates by receiving power from the solar power generation device (Claim 5). This vehicle sensing device can stably supply necessary power from the photovoltaic power generation device to the vehicle detector with a simple configuration and without requiring power.

  By adopting the above configuration, the solar power generation device and the vehicle sensing device according to the present invention can track sunlight with a simple configuration and without requiring electric power.

  Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings. In the present embodiment, the present invention is embodied as a vehicle sensing device installed in a heavy snowfall area and a solar power generation device used for the power source of the vehicle sensing device.

  FIG. 1 is a diagram showing an installation state of the vehicle sensing device in the present embodiment. In the present embodiment, the vehicle sensing device 100 includes a vehicle sensor 101, a wireless transmission unit 102, and a solar power generation device 103. These can be installed on the inverted L-shaped support column 104, for example.

  The vehicle sensor 101 is attached to a horizontally projecting portion of the column 104. In this example, the road on which the column 104 is installed has a plurality of lanes, and the vehicle detector 101 is attached to each traveling lane. Each vehicle sensor 101 has a sensing visual field directed to the corresponding lane, and senses a vehicle 105 traveling in the lane. An infrared sensor can be used as the vehicle sensor 101. The vehicle detector 101 detects far infrared rays emitted from the vehicle and the road surface by an infrared sensor, and detects the presence or absence of the vehicle from the detection signal. The vehicle detector 101 outputs data indicating a detection result such as the number of vehicles per unit time to the wireless transmission unit 102 every predetermined period.

  The wireless transmission unit 102 is connected to the vehicle sensor 101 by wire, receives data indicating the detection result output from the vehicle sensor 102, and transmits the data wirelessly to the surrounding signal controller and traffic control center. Note that the data indicating the sensing result may be transmitted by wire.

  The solar power generation device 103 supplies the electric power obtained by the solar battery panel to the vehicle detector 101. The solar battery panel is disposed above the support column 104 with respect to the vehicle sensor 101 so as to easily receive sunlight, and is installed at an appropriate elevation angle in order to obtain a desired power generation efficiency. The infrared sensor is a passive sensor, and the power consumption of the vehicle sensor 101 using the infrared sensor is extremely small compared to an ultrasonic sensor or the like. For this reason, even if the vehicle sensing device 100 is installed in a heavy snowfall area, if the solar panel is not largely covered with snow and normal power generation efficiency can be obtained, the solar power generation device 103 can supply sufficient power to the vehicle detector. 101 can be supplied.

  FIG. 2A is a diagram showing an example of the appearance of the vehicle sensor, and FIG. 2B is a diagram showing a schematic cross section of the vehicle sensor. The vehicle sensor 101 has a rectangular parallelepiped casing 201. In order to avoid excessive snow accumulation on the vehicle sensor 101, it is preferable to suppress the area of the upper surface of the housing 201. An opening 203 serving as an infrared light entrance is provided on one side surface 202 of the housing 201. By directing the side surface 202 toward the road surface, the vehicle detector 101 receives far infrared rays emitted from the vehicle and the road surface.

  Inside the casing 201, an infrared transmission lens 204, a thermopile element 205, and a circuit board 206 are arranged. The infrared transmission lens 204 is disposed on the back side of the opening 203. The infrared transmission lens 204 collects infrared rays from a vehicle and a road incident on the housing 201 through the opening 203 in the thermopile element 205. The thermopile element 205 receives the infrared rays from the infrared transmission lens 204 and generates a thermoelectromotive force. A sensing circuit including the thermopile element 205 is mounted on the circuit board 206. The sensing circuit is supplied with electric power from the photovoltaic power generation device via the cable 207, and the sensing circuit senses the presence or absence of the vehicle in accordance with a signal from the thermopile element 205.

  FIG. 3 is a diagram showing a schematic configuration example of the sensing circuit of the vehicle detector. In this example, the vehicle sensor 101 includes a detection unit 301, a CPU (Central Processing Unit) 302, a memory 303, and an interface 304. The detection unit 301 includes a thermopile element 205 and outputs a signal corresponding to the intensity of far infrared rays emitted from a vehicle or a road. Based on the signal from the detection unit 301, the CPU 302 determines whether a vehicle or a road is detected. The CPU 302 totals the discrimination results and stores data indicating the sensing results such as the number of vehicles per unit time in the memory 303. The CPU 302 reads data indicating the sensing result from the memory 303 and outputs the data to the wireless transmission unit 102 via the interface 304 every predetermined period. The vehicle sensor 101 and the wireless transmission unit 102 operate by receiving power from the solar power generation device 103. Since the vehicle is detected by a passive operation of receiving infrared rays from the outside with the thermopile element 205, the power consumption of the vehicle sensor 101 is smaller than that of the ultrasonic sensor.

  FIG. 4 is a diagram for explaining the outline of the photovoltaic power generation apparatus according to the present embodiment. This solar power generation apparatus 103 includes two solar cell panels 401 and 402 arranged in a hinge-like manner that can be opened and closed, and an opening / closing unit 403 that opens and closes the solar cell panels 401 and 402 by receiving and deforming sunlight. With. With this configuration, the solar power generation device 103 efficiently receives sunlight from the solar cell panel throughout the day.

  In this solar power generation device 103, the solar cell panels 401 and 402 are arranged with their light receiving surfaces 401 </ b> A and 402 </ b> A facing the south side 404. The solar power generation device 103 changes the azimuth angle of both panels according to the position of the sun in the day by opening and closing the solar cell panels 401 and 402 with the opening / closing means 403.

  In the time zone in which the morning or afternoon sun is at a relatively low position, the solar cell panels 401 and 402 are closed as shown in FIG. 4A. In this state, the light receiving surface 401A of the solar cell panel 401 is oriented in the morning and the light receiving surface 402A of the solar cell panel 402 is oriented in the afternoon so as to be nearly perpendicular to the sunlight in that time zone.

  In the solar power generation device 103, the solar panel 401 and 402 are gradually opened by the opening / closing means 403 and the azimuth angle of both the panels 401 and 402 is changed as the position of the sun increases and the amount of sunlight irradiation increases. Is done. In the time zone in which the sun around noon is at a relatively high position, as shown in FIG. 4B, both panels 401 and 402 are in an open state. Direction). When the position of the sun is lowered and the amount of sunlight is reduced, the solar cell panels 401 and 402 are returned to the state shown in FIG. 4A accordingly.

  As described above, in this solar power generation device 103, in the morning or afternoon, one of the solar cell panels 401 and 402 is substantially oriented in the direction of the sun in the time zone, and at least one of the solar cell panels generates high power. Efficiency can be obtained. Further, near noon, both of the solar cell panels 401 and 402 can be substantially directed toward the sun in that time zone, and the amount of power generation can be increased accordingly. Since the solar cell panels 401 and 402 are installed at different azimuth angles, it is not necessary to deal with variations in the azimuth angle of the solar cell throughout the day with a single solar cell panel. Furthermore, the opening / closing means 403 receives sunlight and deforms, whereby the azimuth angles of the solar cell panels 401 and 402 are changed. Therefore, the solar power generation device 103 can track the sun without requiring electric power with a simple configuration, and can stably supply electric power necessary for the vehicle detector.

  FIG. 5 is a diagram illustrating an example of the appearance of the solar power generation device according to the present embodiment. 5A is a plan view of the solar power generation device, FIG. 5B is a front view of the solar power generation device, and FIG. 5C is a side view of the solar power generation device.

  In the present embodiment, solar power generation apparatus 103 uses right-angled triangular panels for solar cell panels 401 and 402. The solar cell panels 401 and 402 are connected so as to be openable and closable at positions corresponding to the adjacent sides of the right triangle, and are arranged symmetrically with respect to the open / close shaft 501.

  In the present embodiment, the opening / closing shaft 501 is disposed substantially parallel to the vertical direction 502, and the elevation angle of each of the solar cell panels 401 and 402 is approximately 90 degrees. Since the vehicle sensing device in the present embodiment is installed in a heavy snowfall region, if snow accumulates on the surfaces of the solar cell panels 401 and 402, the power generation efficiency is lowered. By making the elevation angle of each of the solar cell panels 401 and 402 approximately 90 degrees, even if snow falls on the surface of the solar cell panels 401 and 402, it is easy to fall, and the amount of snow accumulation on the surface of the solar cell panels 401 and 402 is reduced. It becomes possible to do. However, the elevation angle of the solar cell panels 401 and 402 is not limited to approximately 90 degrees. As long as snow can be appropriately dropped even if there is snow on the surfaces of the solar cell panels 401 and 402, the elevation angle of the solar cell panels 401 and 402 may be set to an angle of 60 degrees to 80 degrees, for example.

  The upper surface of the solar cell panels 401 and 402 is formed with a surface corresponding to the hypotenuse of a right triangle. The solar cell panels 401 and 402 are somewhat thick even if they are plate members. For this reason, when there is snow, it also accumulates on the upper part of the solar cell panels 401 and 402. When this snow cover reaches the light receiving surfaces of the solar cell panels 401 and 402, the power generation efficiency is lowered. By providing an inclination on the upper surface of the solar cell panels 401 and 402, it becomes easy for snow to fall along the inclination even if there is snow. Furthermore, in the present embodiment, snow on the upper surfaces of the solar cell panels 401 and 402 falls to the side end sides of the solar cell panels 401 and 402. Therefore, it is possible to reduce snow accumulation on the upper part of the solar cell panels 401 and 402 as compared with the case where the upper surfaces of the solar cell panels 401 and 402 are provided horizontally.

  The azimuth angles of the solar cell panels 401 and 402 are changed according to the azimuth of the sun throughout the day. Although it changes depending on the season, the azimuth angle of the sun varies within a range of, for example, about 90 degrees to 270 degrees throughout the day. In the state where the solar cell panels 401 and 402 are closed (the state of FIG. 5) with respect to such azimuth variation of the sun, for example, the solar cell panel 401 has an azimuth angle ranging from 90 degrees to 135 degrees. 402 is installed with an azimuth angle ranging from 225 degrees to 270 degrees. In the time zone from when the sun goes up to about 10 am, the light receiving surface of the solar cell panel 401 is directed toward the sun in that time zone, and in the time zone from about 2 pm until the sun goes down, The light receiving surface of the battery panel 402 faces the sun in that time zone. By arranging the solar cell panels 401 and 402 in this manner, at least one of the solar cell panels 401 and 402 receives sunlight efficiently in the morning or afternoon time zone.

  In a state where the solar cell panels 401 and 402 are opened, for example, the solar cell panel 401 is set to an azimuth angle in a range from 135 degrees to 180 degrees, and the solar cell panel 402 is set to an azimuth angle in a range from 180 degrees to 225 degrees. The Thereby, in the time slot | zone from about 10:00 am to about 2 pm, both the solar cell panels 401 and 402 have faced the direction of the sun of the time slot | zone. By opening the solar cell panels 401 and 402 in this manner, both the solar cell panels 401 and 402 receive sunlight efficiently in a time zone near noon. The opening / closing means 403 is used to change the azimuth angle of the solar cell panels 401 and 402 as described above.

  In the present embodiment, the opening / closing means 403 includes a deformable member that is deformed by heat. The opening / closing means 403 changes the opening / closing angle θ between the solar cell panel 401 and the solar cell panel 402 by changing the deformation member, and changes the azimuth angle of the solar cell panels 401 and 402. As the deformable member of the opening / closing means 403, an actuator that expands and contracts as the temperature rises and falls can be used.

  This actuator opens and closes the solar cell panels 401 and 402 by expanding and contracting the operating rod 503 using a spring member of a shape memory alloy. A unidirectional or bi-directional shape memory alloy is used for the spring member. In the case of using a unidirectional shape memory alloy spring member, a two-way operation of the actuator may be realized in combination with a bias spring.

  The opening / closing means 403 is disposed between the solar cell panel 401 and the solar cell panel 402 at a position for receiving sunlight. Here, support arms 504 are respectively provided below the solar cell panels 401 and 402, and operating bars 503 of the opening / closing means 403 are attached to these arms 504. However, the mounting position of the opening / closing means 403 is not limited to this. For example, it may be arranged above the solar cell panels 401 and 402.

  When the housing of the actuator receives sunlight, the temperature of the shape memory alloy spring member rises, and accordingly, the operating rod 503 expands, and the exposure amount of the operating rod 503 from the housing increases. Thereby, the extension force of the operating rod 503 is transmitted to the solar cell panels 401 and 402 via the support arm 504, and the solar cell panels 401 and 402 are opened. On the contrary, when the opening / closing means 403 does not receive sunlight and the temperature of the spring member decreases, the operating rod 503 contracts accordingly, and the exposure amount of the operating rod 503 from the housing decreases. Accordingly, the contraction force of the operating rod 503 is transmitted to the solar cell panels 401 and 402 via the support arm 504, and the solar cell panels 401 and 402 are closed.

  It is preferable to arrange the actuator so that the housing can easily receive sunlight from the south side. In this example, the longitudinal direction of the actuator is arranged in the east-west direction. As a result, the temperature of the actuator can be easily increased around noon. Further, the operating temperature range of the shape memory alloy is determined according to the amount of sunlight irradiated and the temperature change in one day. As described above, in the solar power generation device 103, the two solar cell panels 401 and 402 are disposed so as to be able to be opened and closed in a hinge shape. There is no need to deal with. For this reason, the deformation amount of the shape memory alloy and the operating range on the mechanism can be made relatively small, and as a result, the mechanism can be simplified.

  FIG. 6 is a diagram illustrating an example of a connection circuit of the solar battery panel. In the solar power generation device 103, the solar battery panels 401 and 402 are connected in parallel through the backflow prevention diodes 601 and 602. When the solar cell panels 401 and 402 are connected in series, the solar cell panel with a small amount of received light limits the circuit current. As described above, the azimuth angles of the plurality of solar cell panels 401 and 402 are different, and the amount of received sunlight is often greatly different. For this reason, the solar cell panels 401 and 402 are connected in parallel so that the generated power of the solar cell panel with a large amount of received light can be taken out. Further, diodes 601 and 602 are connected in series to the solar cell panels 401 and 402, respectively, so that current from other solar cell panels does not flow. Note that a storage battery may be connected to the output of the solar cell panel to store the electric power from the solar cell panel.

  Thus, in the solar power generation device according to the present embodiment, two solar cell panels are arranged so as to be openable and closable in a hinge shape, and each solar cell panel is directed to a different azimuth angle. Further, the solar cell panel is opened and closed by the opening and closing means receiving sunlight. For this reason, sunlight can be efficiently received by any of the solar cell panels, and the azimuth angle of the solar cell panel can be changed without requiring electric power by further deforming the opening / closing means by receiving sunlight. Can do. Therefore, the solar power generation device can track the sun with such a simple configuration and without requiring electric power. The vehicle detector can operate stably by receiving power supply from the photovoltaic power generation apparatus according to the present embodiment.

  Furthermore, in the solar power generation device in the present embodiment, the solar cell panel is installed at a substantially vertical elevation angle. For this reason, it is possible to suppress snow accumulation on the surface of the solar cell panel. Furthermore, in the solar power generation device in the present embodiment, since the upper surface of the solar cell panel is inclined, it is possible to suppress snow accumulation on the upper portion of the solar cell panel.

  The embodiments described above do not limit the technical scope of the present invention, and various modifications and applications other than those already described are possible within the scope of the present invention. In the above-described embodiment, the present invention is applied to a vehicle sensing device using an infrared sensor. However, the present invention is not limited to this, and the present invention may be applied to a vehicle sensing device using other types of sensors. Is possible.

  Furthermore, the solar power generation device of the present invention can be used for devices other than the vehicle sensing device. Even when used in other equipment such as communication equipment, the photovoltaic power generation apparatus of the present invention can stably supply power to the equipment.

  FIG. 7 is a diagram illustrating a modification of the solar power generation device. This solar power generation device 701 uses rectangular solar cell panels 702 and 703, and the upper surface of the solar cell panel itself is not provided with an inclination for suppressing snow accumulation. The solar power generation device 701 includes snow accumulation suppressing members 704 and 705 for suppressing snow accumulation on the upper part of the solar cell panel above the solar cell panels 702 and 703. As the snow accumulation suppressing members 704 and 705, a plate material having a right triangle shape in a plan view can be used. The snow accumulation suppressing members 704 and 705 are arranged so that the light receiving surfaces of the solar cell panels 702 and 703 and the plate surfaces thereof are aligned. By attaching such snow accumulation suppressing members 704 and 705 to the upper surfaces of the solar cell panels 702 and 703, it is possible to suppress snow accumulation on the solar cell panels 702 and 703 regardless of the shape of the solar cell panels 702 and 703. It becomes possible.

  In addition, it is also possible to utilize the snow accumulation suppressing members 704 and 705 as members that prevent snow accumulation on the surfaces of the solar cell panels 702 and 703. For example, the snow accumulation suppressing members 704 and 705 are set to be larger than the solar cell panels 702 and 703, that is, approximately 90 degrees or more, and the snow accumulation suppressing members 704 and 705 are attached to the solar cell panels 702 and 703. As a result, the snow accumulation suppressing members 704 and 705 become bowl-shaped, and it is possible to suppress the snow from adhering to the light receiving surfaces of the solar cell panels 702 and 703.

  In the above-described embodiment, the solar cell panel is opened and closed by utilizing the deformation of the shape memory alloy spring caused by the heat of sunlight. However, the present invention is not limited to this. For example, you may make it open and close a solar cell panel using the volume change of enclosure gas. An actuator that converts the thermal expansion / contraction of the sealed gas into the expansion / contraction motion of the operating rod can be used. When sunlight hits the housing of the actuator and the temperature of the sealed gas rises, the gas expands and the amount of exposure of the actuating rod from the housing increases. On the other hand, when the temperature of the sealed gas is lowered without sunlight hitting the casing, the gas contracts and the exposure amount of the actuating rod from the casing decreases. In this way, the solar cell panel may be opened and closed by changing the outer shape of the actuator using the change in volume of the sealed gas. In addition, the solar cell panel may be opened and closed by utilizing deformation due to heat of the bimetal. A coiled bimetal is attached to the rotating shaft of the solar cell panel, and the solar cell panel is rotated by deformation of the bimetal. Also in this case, the solar cell panel is opened when the sunlight hits and the temperature rises, and when the temperature falls without being exposed to the sunlight, the solar cell panel is closed. In addition, in order to open and close a solar cell panel, you may make it use combining a part or all of the deformation | transformation of a shape memory alloy, the body wall change of enclosed gas, and the deformation | transformation of a bimetal.

  Moreover, in the above-mentioned embodiment, the solar cell panels 401 and 402 were opened and closed because the opening / closing means 403 received sunlight directly. However, an endothermic plate that receives sunlight heat is provided separately, and the heat obtained by the endothermic plate is transmitted to the opening / closing means 403 so that the opening / closing means 403 is operated and the solar cell panels 401 and 402 are opened and closed. Also good.

  In the above embodiment, the azimuth angle of the solar cell panel is changed by opening and closing the solar cell panel. However, instead of or in addition to that, the elevation angle of the solar cell panel is changed. May be.

  Furthermore, you may make it equip a solar power generation device with 3 or more solar cell panels. Moreover, you may make it open and close a solar cell panel by fixing a part of two or more solar cell panels, and making the remaining solar cell panels movable.

  The solar power generation device and the vehicle sensing device of the present invention can track the sun with a simple configuration and do not require power, and can stably supply power to the vehicle detector and other devices. is there.

It is a figure which shows the installation state of the vehicle detection apparatus in this Embodiment. FIG. 2A is a diagram showing an example of the appearance of the vehicle sensor, and FIG. 2B is a diagram showing a schematic cross section of the vehicle sensor. It is a figure which shows the schematic structural example of the sensing circuit of a vehicle sensor. It is a figure explaining the outline of the solar power generation device in this Embodiment. It is a figure which shows an example of the external appearance of the solar power generation device in this Embodiment. It is a figure which shows the example of a connection circuit of a solar power generation device. It is a figure for demonstrating the modification of a solar power generation device.

Explanation of symbols

DESCRIPTION OF SYMBOLS 100 Vehicle detection apparatus 101 Vehicle detector 102 Wireless transmission unit 103 Photovoltaic power generation apparatus 104 Post support 105 Vehicle 201 Vehicle detector housing 202 Front surface of vehicle detector 203 Front opening of vehicle detector 204 Infrared transmitting lens 205 Thermopile element 206 Vehicle Circuit board of sensor 207 Cable 301 Detection unit of vehicle sensor 302 CPU of vehicle sensor
303 Vehicle Sensor Memory 304 Vehicle Sensor Interface 401, 402 Solar Panel 403 Opening / Closing Means 404 South Arrow 501 Opening Shaft 502 Vertical Arrow 503 Actuator 504 Support Arm 601, 602 Backflow Prevention Diode 701 Deformation Solar power generation device 702, 703 according to example Solar cell panel 704, 705 according to modification

Claims (5)

A plurality of solar panels arranged in a hinge-like manner to be opened and closed;
Opening and closing means for opening and closing the plurality of solar cell panels by being deformed by receiving sunlight. The opening / closing means
It has a deformable member that is installed at a position that receives sunlight and deforms by heat,
The solar power generation device according to claim 1, wherein an opening / closing angle between the plurality of solar battery panels is changed by deformation of the deformation member.   The photovoltaic power generation apparatus according to claim 2, wherein the deformable member is deformed by utilizing at least one of deformation of a shape memory alloy, volume change of an enclosed gas, and deformation of a bimetal.   4. The solar cell panel according to claim 1, wherein each of the plurality of solar cell panels is installed at a substantially vertical elevation angle, and the azimuth angle of the solar cell panel is changed by opening and closing the plurality of solar cell panels using the opening / closing means. The solar power generation device of any one of Claims. A solar power generation device according to any one of claims 1 to 4,
A vehicle sensor comprising: a vehicle sensor that operates by receiving power from the solar power generation device.

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