CN204154388U - Novel illuminance sensor - Google Patents

Abstract

The utility model discloses a novel illuminance sensor, which comprises an n*n array photosensitive unit, an amplifying circuit and a high-speed AD conversion circuit, and the n*n array photosensitive unit, an amplifying circuit and a high-speed AD conversion circuit are integrated together On the circuit board, the output signals of the n*n array photosensitive units are transmitted to the AD conversion circuit after passing through the amplification circuit, and output after passing through the AD conversion circuit. To achieve the purpose of accurately sensing the position of the light source and the change of illuminance.

Description

New light sensor

technical field

The utility model relates to the field of photoelectric conversion sensors, in particular to a novel illuminance sensor.

Background technique

At present, the illuminance sensor is based on a photoelectric conversion element, which can convert the amount of light into electricity. After processing by analog and digital circuits, it can obtain the illuminance of the current ambient light, and mainly complete the detection of ambient light.

Now commonly used photoelectric conversion elements are photocells, photoresistors, photodiodes and photomultiplier tubes. When using an existing light sensor to measure illuminance, it is necessary to amplify and convert the electrical signal converted by the photosensitive unit, and output an analog value or convert it into a digital value through analog-to-digital conversion. Since the commonly used measurement methods need to go through a series of relatively complex conversion circuits, there are often disadvantages such as amplification drift and susceptibility to interference. The results obtained by existing measurement methods can only be the illuminance at the location of the sensor, which cannot reflect the position change information of the light source. Therefore, there are limitations in some applications that need to sense changes in the position of the light source.

Utility model content

The purpose of this utility model is to propose a new type of illuminance sensor to realize the advantage of accurately sensing the position change of the light source in view of the above problems.

For realizing above-mentioned object, the technical scheme that the utility model adopts is:

A new type of illuminance sensor, including an n*n array photosensitive unit, an amplifier circuit and a high-speed AD conversion circuit, the n*n array photosensitive unit, an amplifier circuit and a high-speed AD conversion circuit are integrated on a circuit board, so that The output signals of the n*n array photosensitive units are transmitted to the AD conversion circuit after passing through the amplification circuit, and output after passing through the AD conversion circuit.

Further, the outer edges of the n*n array photosensitive units are rectangular or circular.

Further, a digital transmission interface is also included, and the output end of the AD conversion circuit is connected to the digital transmission interface.

Further, the digital transmission interface adopts SPI or IIC interface.

Further, an optical lens is arranged above the n*n array photosensitive units.

Further, an X-direction address drive circuit is provided in the X-axis direction of the n*n array photosensitive units, and a Y-direction address drive circuit is provided in the Y-axis direction of the photosensitive units.

The technical solution of the utility model has the following beneficial effects:

In the technical solution of the utility model, by setting n*n array photosensitive units and adopting the structure of an array photosensitive plane, the illuminance values of different photosensitive units in the photosensitive plane can be measured. At the same time, due to the different angles of light, the light intensity received by the photosensitive unit closer to the light source is the strongest, so the power converted by each photosensitive unit is also different. Therefore, the relative position of the light source is calculated according to the change trend of the light-sensing value of each light-sensing unit on the light-sensing plane, so as to achieve the purpose of accurately sensing the position of the light source and the change of illuminance. It can be well applied in maximum power tracking of solar energy. The AD converter is built into the sensor, so it can well avoid external interference. Compared with the existing technology, it has the advantages of high precision, strong anti-interference ability, fast speed and high integration degree.

Description of drawings

Figure 1 is a block diagram of the new light sensor;

Fig. 2 is a functional block diagram of the novel light intensity sensor described in the embodiment of the present invention.

Detailed ways

The preferred embodiments of the present utility model are described below in conjunction with the accompanying drawings. It should be understood that the preferred embodiments described here are only used to illustrate and explain the present utility model, and are not intended to limit the present utility model.

As shown in Figure 2, a new type of light sensor includes an n*n array photosensitive unit, an amplifier circuit, and a high-speed AD conversion circuit. The n*n array photosensitive unit, an amplifier circuit, and a high-speed AD conversion circuit are integrated in one circuit On the board, the output signals of the n*n array photosensitive units are transmitted to the AD conversion circuit after the amplification circuit, and then output after the AD conversion circuit.

Wherein, the outer edge of the n*n array photosensitive unit is rectangular or circular, and the shape can also be changed according to the actual application. The novel illuminance sensor also includes a digital transmission interface, and the output end of the AD conversion circuit is electrically connected to the digital transmission interface.

The digital transmission interface adopts SPI or IIC interface.

The n*n array photosensitive unit is referred to as a photosensitive unit, and an optical lens is arranged above the photosensitive unit. An X-direction address driving circuit is arranged in the X-axis direction of the photosensitive unit, and a Y-direction address driving circuit is arranged in the Y-axis direction of the photosensitive unit.

In order to meet different application conditions, a voltage conversion circuit is added, and the light value can be output in analog mode.

Finally, it should be noted that: the above is only a preferred embodiment of the utility model, and is not intended to limit the utility model, although the utility model has been described in detail with reference to the foregoing embodiments, for those skilled in the art , it is still possible to modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements for some of the technical features. Any modification, equivalent replacement, improvement, etc. made within the spirit and principles of the present utility model shall be included in the protection scope of the present utility model.

Claims (6)

1. A novel illuminance sensor, characterized in that it comprises an array photosensitive unit of n*n, an amplifier circuit and a high-speed AD conversion circuit, and the array photosensitive unit of said n*n, an amplifier circuit and a high-speed AD conversion circuit are integrated in On a circuit board, the output signals of the n*n array photosensitive units are transmitted to the AD conversion circuit after being passed through the amplification circuit, and output after passing through the AD conversion circuit. 2. The novel illuminance sensor according to claim 1, wherein the outer edge of the n*n array photosensitive unit is rectangular or circular. 3. The novel illuminance sensor according to claim 1 or 2, further comprising a digital transmission interface, the output end of the AD conversion circuit is electrically connected to the digital transmission interface. 4. The novel illuminance sensor according to claim 3, characterized in that, said digital transmission interface adopts SPI or IIC interface. 5 . The novel illuminance sensor according to claim 4 , wherein an optical lens is arranged above the n*n array photosensitive unit. 6 . 6. The novel illuminance sensor according to claim 5, characterized in that, the X-axis direction of the n*n array photosensitive unit is provided with an X-direction address drive circuit, and the Y-axis direction of the photosensitive unit is provided with a Y-direction address Drive circuit.