CN112665717A

CN112665717A - Vehicle-mounted 3D sunlight sensor and photosensitive temperature adjusting method thereof

Info

Publication number: CN112665717A
Application number: CN202011618204.3A
Authority: CN
Inventors: 张德成; 张亚林
Original assignee: Casco Automotive Suzhou Co Ltd
Current assignee: Casco Automotive Suzhou Co Ltd
Priority date: 2020-12-31
Filing date: 2020-12-31
Publication date: 2021-04-16
Anticipated expiration: 2040-12-31
Also published as: CN112665717B

Abstract

The invention provides a vehicle-mounted 3D sunlight sensor which comprises a shell, wherein a chip is arranged in the shell, four photosensitive elements are arranged on the chip, a receiving hole for light to pass through is formed in the shell, and a vertical gap is formed between the shell and the photosensitive elements. The invention has the beneficial effects that: the sensor can accurately position the direction of the sun, and then judge the temperature of different seats in the vehicle, so as to accurately adjust the air output of air outlets at different positions of the air conditioner, greatly improve the riding comfort of drivers and passengers, reduce the resource waste of the air conditioner caused by the unreasonable distribution of the air blowing amount, and save the energy consumption of the vehicle.

Description

Vehicle-mounted 3D sunlight sensor and photosensitive temperature adjusting method thereof

Technical Field

The invention relates to a vehicle-mounted 3D sunlight sensor and a photosensitive temperature adjusting method thereof.

Background

With the improvement of living standard of people, automobiles become an indispensable tool for riding instead of walk. The sunlight sensor receives sunlight infrared rays through the photosensitive element to judge the intensity of the current sunlight, the sensor transmits a sunlight intensity signal to the automobile air conditioner control unit, and the control unit controls the air conditioner to blow air to adjust the temperature in the cockpit. The existing sunlight sensor can only singly judge the intensity of the solar infrared rays or the left and right positions of the sun, and cannot identify the specific elevation angle and azimuth angle of the sun in the sky, so that the blowing position and the air volume of the air conditioner cannot be accurately controlled, and the energy consumption of a vehicle can be increased invisibly.

Disclosure of Invention

In order to solve the problems in the prior art, the invention provides a vehicle-mounted 3D solar sensor and a photosensitive temperature adjusting method.

The purpose of the invention is realized by the following technical scheme:

the vehicle-mounted 3D solar sensor comprises a shell, wherein a chip is arranged in the shell, four photosensitive elements are arranged on the chip, a receiving hole for light to pass through is formed in the shell, and a vertical gap is formed between the shell and the photosensitive elements.

Preferably, the cross section formed by the mutual juxtaposition and close contact of every two photosensitive elements is quadrilateral.

Preferably, each of the photosensitive elements receives solar rays partially through the receiving aperture.

Preferably, the receiving hole is circular in cross-section.

Preferably, the area of the receiving hole is 1.1 to 1.3 times the area of the single photosensitive element.

Preferably, the photosensitive temperature adjusting method of the vehicle-mounted 3D solar sensor includes the following steps:

s1, forming a coordinate system by taking four photosensitive elements as four quadrants respectively, and taking the central point of the coordinate system as an origin;

s2, calculating X, Y values of the central point position of the incident light spot in a coordinate system according to the photocurrent difference generated by the four photosensitive elements;

s3, calculating the elevation angle and the azimuth angle of the sun through the receiving hole size and the distance from the packaging shell to the photosensitive element and the X, Y value;

and S4, judging the corresponding seat with strong light and weak light according to the sun elevation angle and the azimuth angle calculated in the S3, and controlling the air blowing position and the air blowing amount of the air conditioner through an air conditioner control unit.

Preferably, the X, Y value in S2 is calculated as:

where α is a correction factor, β is a coefficient related to h and d, and i1, i2, i3, i4 are photocurrents of the corresponding photosensors, respectively.

Preferably, the method for calculating the elevation angle and the azimuth angle of the sun in S3 is:

when X is present>0，Y>At 0; theta is 90-theta; when X is present<0，Y>When 0, theta is 270-theta; when X is present<0，Y<When 0, theta is 270+ theta; when X is present>0，Y<When 0, θ is 90+ θ.

The invention has the beneficial effects that: the sensor can accurately position the direction of the sun, and then judge the temperature of different seats in the vehicle, so as to accurately adjust the air output of air outlets at different positions of the air conditioner, greatly improve the riding comfort of drivers and passengers, reduce the resource waste of the air conditioner caused by the unreasonable distribution of the air blowing amount, and save the energy consumption of the vehicle.

Drawings

FIG. 1: the invention has a structure schematic diagram.

FIG. 2: the invention discloses a chip back structure schematic diagram.

FIG. 3: the light is irradiated into the photosensitive element.

FIG. 4: fig. 3 is a schematic cross-sectional structure.

Detailed Description

The technical scheme of the invention is specifically described below by combining with an embodiment, and the invention discloses a vehicle-mounted 3D sunlight sensor, which is shown in fig. 1-2, and similar to the prior art, the vehicle-mounted 3D sunlight sensor comprises a housing, a chip is arranged in the housing, and different from the prior art, four photosensitive elements, namely a first photosensitive element 1, a second photosensitive element 2, a third photosensitive element 3 and a fourth photosensitive element 4, are arranged on the chip, and in the embodiment, the cross section formed by mutually and closely attaching the four photosensitive elements in pairs is quadrilateral. The housing is provided with a receiving hole 5 for light to pass through, so that each photosensitive element partially receives solar rays through the receiving hole. In the present invention, the receiving hole 5 has a circular cross section. A vertical gap is arranged between the shell and the photosensitive element. Specifically, the area of the receiving hole 5 is 1.1 to 1.3 times the area of the single photosensitive element. Six pins are arranged on the chip, wherein four pins are respectively a first pin 11, a second pin 21, a third pin 31 and a fourth pin 41 which respectively correspond to the corresponding photosensitive assemblies, and the other two pins are grounding pins 6.

The invention also discloses a light-sensing temperature adjusting method of the vehicle-mounted 3D solar sensor, which is shown in a combined figure 3-figure 4 and comprises the following steps:

s2, calculating X, Y values of the central point position of the incident light spot in a coordinate system according to the photocurrent difference generated by the four photosensitive elements; wherein, the X, Y value calculation mode is as follows:

where α is a correction factor, β is a coefficient related to h and d, and i1, i2, i3, i4 are photocurrents of the corresponding photosensors, respectively. The principle of the photocurrent size is that when light irradiates on the photosensitive elements from the left side, the two photosensitive elements on the right side, the photocurrent generated by the third photosensitive element 3 and the fourth photosensitive element 4 is large, the light irradiates on the left side two photosensitive elements from the right side, the photocurrent generated by the first photosensitive element 1 and the second photosensitive element 2 is large, sunlight irradiates on the photosensitive elements from the upper right corner, the photocurrent generated by the second photosensitive element 2 is maximum, and then the first photosensitive element 1, the third photosensitive element 3 and the fourth photosensitive element 4 are minimum.

S3, calculating the elevation angle and the azimuth angle of the sun through the receiving hole size and the distance from the packaging shell to the photosensitive element and the X, Y value; wherein the method for calculating the elevation angle and the azimuth angle of the sun in S3 comprises:

When the sun is in different directions in the sky, due to the limitation of the packaging of the elements, the infrared intensities of the sunlight received by the photosensitive elements in the four quadrants are different, the generated photocurrents need to be amplified by the amplifying circuit, the amplified output values are transmitted to the MCU for AD conversion, and the MCU further calculates the direction of the sun in the sky by comparing the four output values, so that the final adjustment purpose is realized.

There are, of course, many other specific embodiments of the invention and these are not to be considered as limiting. All technical solutions formed by using equivalent substitutions or equivalent transformations fall within the scope of the claimed invention.

Claims

1. On-vehicle 3D solar sensor, its characterized in that: the LED lamp comprises a shell, wherein a chip is arranged in the shell, four photosensitive elements are arranged on the chip, a receiving hole for light to pass through is formed in the shell, and a vertical gap is formed between the shell and the photosensitive elements.

2. The vehicular 3D solar sensor according to claim 1, wherein: the sections formed by the mutual parallel and close adhesion of every two photosensitive elements are quadrilateral.

3. The vehicular 3D solar sensor according to claim 1, wherein: each of the photosensitive elements receives solar rays partially through the receiving aperture.

4. The vehicular 3D solar sensor according to claim 2, wherein: the receiving hole is circular in cross section.

5. The vehicular 3D solar sensor according to claim 4, wherein: the area of the receiving hole is 1.1-1.3 times of the area of the single photosensitive element.

6. The photosensitive temperature adjusting method of the vehicle-mounted 3D solar sensor according to any one of claims 1-5, characterized in that: the method comprises the following steps:

7. The photosensitive temperature adjustment method of the vehicle-mounted 3D solar sensor according to claim 6, characterized in that: the calculation mode of X, Y values in the S2 is as follows:

8. The photosensitive temperature adjustment method of the vehicle-mounted 3D solar sensor according to claim 6, characterized in that: the method for calculating the elevation angle and the azimuth angle of the sun in the step S3 includes:

when X is present>0，Y>At 0; theta is 90-theta; when X is present<0，Y>At the time of 0, the number of the first,theta is 270-theta; when X is present<0，Y<When 0, theta is 270+ theta; when X is present>0，Y<When 0, θ is 90+ θ.