JP2552028Y2 - Solar radiation sensor - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention relates to a solar radiation sensor that receives sunlight by a photodetector such as a solar cell or a photodiode and detects the amount and direction of solar radiation.

[Conventional technology]

Conventionally, for example, a solar radiation sensor of this type has been known as shown in FIG. In the figure, A, B, C, and D are photodetectors mounted on a vertical surface of a rectangular support pedestal in four directions, respectively, and E is a photodetector mounted on a horizontal surface of the support. By arranging the photodetectors on the five surfaces of the support and comparing and calculating the outputs of the photodetectors, it is possible to accurately detect the amount of solar radiation and the direction of solar radiation (azimuth and altitude of the sun). (For example, see JP-A-51-38137).

[Problems to be solved by the invention]

However, the above-mentioned solar radiation sensor needs to connect a lead wire for taking out an output from each light detecting element on the support base, and furthermore, to connect a lead wire on a circuit board for processing output data, etc. Attaching work or connecting work with a connector is required, which increases the number of complicated steps and makes assembly work by an automatic machine extremely difficult and problematic. Furthermore, this is also a problem because the entire device is enlarged due to the connection of the lead wires.

[Purpose of the invention]

Therefore, the present invention solves the above-mentioned problems by arranging the photodetectors three-dimensionally, and even if components other than the photodetectors are mounted, the apparatus does not increase in size, and mass production by an automatic machine is extremely difficult. It is an object of the present invention to provide a solar radiation sensor that is easy to use.

[Means for solving the problem]

 The above problem is solved by the following means.

That is, the photodetector is arranged on the base on which the wiring pattern is formed, at least the light receiving surface of the photodetector is covered with a transparent resin, and a gap is provided between the transparent resin and the base. This problem is solved by a solar radiation sensor, wherein an output correction element for correcting a temperature characteristic of an output of the light detection element is provided in the gap.

[Action]

According to the present invention, it is not necessary to connect a lead wire for taking out an output from the photodetector, and furthermore, a soldering work or a connector is used to connect the lead wire on a circuit board for processing output data. Since no operation is required, the process is simplified, and the assembly operation by an automatic machine becomes extremely easy. Further, since even a lead wire is not required, the solar radiation sensor can be downsized.

〔Example〕

Embodiments according to the present invention will be described in detail with reference to the drawings.

FIG. 1 shows a state in which a solar radiation sensor S (hereinafter, also simply referred to as a sensor S) is inserted into and attached to a cylindrical holder 3 on an upper surface of a dashboard D in a vehicle compartment.

The sensor S has an outer shape composed of an integrally formed exterior cover 1 and a bottom plate 2 connected to the exterior cover 1. The exterior cover 1 includes a cylindrical upper body 1a having sunlight and receiving light, and a box-shaped lower body 1b containing a circuit board. The upper end of the cylindrical body 1a is a hemisphere, and this cylindrical body is
1a is inserted into the holder 3, and only the hemispherical portion is exposed to the outside.

A flange 3a is formed on the upper surface of the holder 3, and its circumferential direction is positioned by inserting the flange 3a into the opening of the dashboard D. That is, a convex portion (not shown) is formed on the side surface 3b of the holder 3, and the opening of the dashboard D is formed according to the outer shape of the holder 3, so that the holder 3 has no flexibility in the circumferential direction. Further, two substantially L-shaped fitting grooves are provided on the side surface 3b, and the cylindrical upper body portion 1a is provided.
The protrusions 1c, 1c formed at two locations on the outer periphery of the sensor S are fitted to the protrusions, whereby the circumferential direction of the sensor S is positioned. Further, the sensor S is urged downward by the spring 4 attached to the lower end of the cylindrical upper body 1a and compressed between the lower surface of the dashboard D and the sensor S, so that the holder 3 and the sensor S are more firmly connected. It is fixed to the dash board D, and also acts as a cushioning function against vibration of the vehicle.

In the figure, W is a windshield, a sensor S receives sunlight through the glass, and a photodetector, which will be described later, generates an electromotive force, and performs data processing based on the output.

FIG. 2 is a partial cross-sectional view showing the internal structure of the sensor S, and shows a cross section taken along line II-II in FIG.

The exterior cover 1 houses a three-dimensional molded board (base) 6 on which the photodetector 5 is mounted, a circuit board 10 to which the board is connected, and connector pins 11 to which the circuit board 10 is connected.

The exterior cover 1 is formed by injection-molding a polycarbonate mixed with a dye in order to prevent light having a wavelength of about 600 nm or less including visible light from reaching the light detecting element 5 and to provide heat resistance. Also, the photodetector 5 is covered,
The hemispherical surface of the cylindrical upper body portion 1a exposed to the outside is subjected to a graining process to give irregularities of about several tens of μm in order to improve the anti-glare property of the driver, and furthermore, this surface is provided with a refraction of incident light. It is covered with a transparent silicon resin or the like of about 5 to 10 μm for the purpose of preventing and effectively taking in light and improving the scratch resistance of the surface (to prevent scratching). Here, the thickness of the hemisphere is about 1.5 mm. Further, in order to suppress the refraction of the incident light and improve the moisture resistance and the seismic resistance in the cylindrical body 1a, a transparent silicon resin 12 is sealed inside the hemisphere, and at least the light receiving surface of the light detecting element 5 is formed. I cover it.

Next, the three-dimensional molded substrate 6 will be described with reference to FIGS.
Will be described. In the figure, F, B, L, R, T are before, after,
Shows left, right, and upward directions, and the windshield of the vehicle in the F direction. 3 is a view of the three-dimensional molded substrate 6 as viewed from above, FIG. 4 is a view as viewed from the R direction in FIG. 3, and FIG. 5 is a view as viewed from the F direction in FIG.

The three-dimensional molded substrate 6 is formed by integrally molding a liquid crystal polymer (wholly aromatic polyester) having solder heat resistance by injection molding and forming a wiring pattern 7 by electroless plating. The three-dimensional molded substrate 6 has a substantially quadrangular prism-shaped substrate head 6a on which the photodetecting element 5 is mounted, a substrate body 6b on which the thermistor chip 8 and the like are mounted, and outputs of these elements to a circuit board 10
And a board foot 6c for leading out to the outside. Here, as is apparent from the figure, a thermistor chip as an output correction element for correcting the temperature of the output of the light detection element 5 is disposed in a gap provided between the silicon resin 12 and the three-dimensional molded substrate 6. I have.

The photodetecting element 5 is a single crystal silicon solar cell having a size of about 6 mm × 6 mm square and 0.4 mm thick, and each face of the substrate head 6a, that is, five faces 5f, 5b, 5l, 5r, and 5t excluding the bottom face ( Each subscript corresponds to the direction F, B, L, R, T). Each photodetector 5 has a negative pole on the front side and a positive pole on the back side.
A recording pattern (not shown) is formed on each surface of the substrate head 6a so that an output can be taken out, and through holes (not shown) are also formed on the substrate head 6a and the body 6b. The thermistor chip 8 is wired in the body of the substrate so as to be connected in parallel to each of the light detecting elements 5, and corrects the output temperature characteristics of each of the light detecting elements 5. A total of six wiring patterns are formed on the substrate foot 6c up to the tip 6d, and five of the wiring patterns 7f, 7b, 7l, 7r, and 7t are wiring patterns for output of the positive pole of each photodetector. , 7g are the negative (common) output wiring patterns. The tip 6d is soldered to the circuit board 10 so that the output of each element is input to the circuit board 10.

The photodetector 5 is fixed to the substrate head 6a with cream solder and an ultraviolet curable adhesive, and is fired in a heat treatment furnace. Further, the convex portion 6e formed on the substrate body 6b is fitted into a concave portion (not shown) formed inside the exterior cover 1 so as to position the three-dimensional molded substrate 6 with respect to the exterior cover 1. Although the substrate head 6a is slightly inclined, this is matched with the inclination of the dashboard, and the inclination is set so that the photodetector 5t is horizontal.

The circuit board 10 is a glass epoxy resin double-sided board,
The connector pin 11 is formed by two-layer plating of phosphor bronze / Cu, Sn. The connector pin 11 is directly mounted on the circuit board 10 and is housed in the outer cover 2 by the bottom plate 12 of polycarbonate, so that the receptacle connector is formed. Form.

With the configuration of the solar radiation sensor as described above, the amount of solar radiation and the direction of the solar radiation are transmitted as serial data to the air-conditioning control device shown in the drawings, the blast temperature is adjusted based on this information, and The air volume can be controlled for each of the provided outlets. Further, the solar radiation sensor may be used for an observation device, for example, and is not limited to a vehicle.

[Effect of the invention]

As described above, according to the solar radiation sensor of the present invention, the lead wire for extracting the output from the light detection element is not required, and the soldering work for connecting the lead wire and the connection work using the connector are also unnecessary. In addition, the manufacturing process is simplified, the assembling operation using an automatic machine or the like can be performed extremely easily and quickly, and a small solar radiation sensor can be provided.

Further, by providing an output correction element for correcting the temperature of the output of the light detection element such as a thermistor in a gap provided between the base and the transparent resin, a very excellent small-size and high-precision is obtained. An insolation sensor can be provided.

[Brief description of the drawings]

1 to 5 are views showing one embodiment according to the present invention. FIG. 1 is a partial sectional view showing a state where a solar radiation sensor is attached to a dashboard, and FIG. 1 is a partial sectional view taken along the line II-II in FIG. 1, FIG. 3 is a view from the head side of the three-dimensional molded substrate, FIG. 4 is a view from the R direction in FIG. 3, and FIG. It is the figure seen from the F direction in. FIG. 6 is a perspective view showing a conventional solar radiation sensor. 1 ... exterior cover, 3 ... holder, 4 ... spring, 5 ...
Photodetector element, 6: three-dimensional molded board, 10: circuit board, D
...... Dashboard, S ... Insolation sensor.

 ──────────────────────────────────────────────────続 き Continuation of the front page (56) References Japanese Utility Model Showa Sho 62-1114387 (JP, U) Tokuhyo Hei 4-506111 (JP, A)

Claims (1)

(57) [Scope of request for utility model registration] 1. A photodetector is provided on a base on which a wiring pattern is formed, at least a light receiving surface of the photodetector is covered with a transparent resin, and between the transparent resin and the base. An insolation sensor comprising: a gap; and an output correction element for correcting a temperature characteristic of an output of the photodetector in the gap.