SU759806A1 - Heliotechnical plant servosensor - Google Patents

Description

The invention relates to the field of solar technology and can be used as a sensor for an automatic tracking system of a solar installation.

Known sensor tracking solar installation, containing photosensitive elements located on the substrate and separated by opaque partitions - (1). The disadvantages of the known sensor are low sensitivity and low service life, due to the fact that the photosensitive elements are constantly experiencing radiation radiation.

The purpose of the invention is to improve accuracy.

This goal is achieved by the fact that the sensor further comprises a screen mounted above the partitions. In addition, the sensor ¹⁵ may include a housing that is made “- ”naked in the lower part opaque and mounted on a substrate.

The drawing shows the sensor tracking solar installation.

The installation contains the photosensitive elements 1 and 2, located on the substrate 3 and separated by opaque trans2

ν towns 4 and 5. The sensor also includes a housing 7; made in the lower part 8 opaque and mounted on the substrate 3. The screen 6 is also not-made.

: transparent, for example, mirror outside. / Elements 1 are used for rough pickups,

; elements 2 - for accurate. Every couple ^! Photosensitive elements located in opposite quadrants formed by partitions 4 and 5 are controlled through amplifiers by tracking drives — Asia / Mutal and Zenithal (not shown). Accuracy crosstalk to a certain degree determined by the height generator armature) Busan precisely svetoί distance ratio sensor from the shell ¹ cor- Pusa. to its height.

 The height of the body can be dramatically reduced if the body is made of a transparent solid material, such as glass.

; In this case, as a result of refraction of the beam on the surface of a solid (glass.), The deflection of the beam significantly increases and a sufficiently high accuracy of the sensor is ensured by a relatively compact device. Similar. the result can

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be obtained by filling the body with a clear liquid.

The degree of size reduction of the sensor, for a given accuracy Significantly depends on the refractive index of the substance from which the body is made. I

The sensor works as follows.

The control of a solar-powered drive in a long-stop station, after a long absence of the Sun, begins with the operation of 1 coarse guidance elements. In this case, the mismatch angle αι has a large value, which leads to exposure of the photosensitive elements located closer to the center of the housing, as a result, the drive operates in the forced mode.

When reducing the angle of mismatch to a minimum (a ₂ ) the drive in the normal mode is controlled by. Elements 2 located on the periphery.

In normal mode, the body geometry is directed towards the light source. The main luminous flux does not fall on the elements and the minimum dark current passes through them. Photocells that serve as photosensitive elements 1 and 2 are selected with equal values of the dark current.

With a small deviation (angle a ₂ ) of the axis of the housing 7 from the direction to the center of the source of radiant energy, the illumination of one of the peripheral elements 2 changes, the equilibrium of the parallel balanced amplifier circuit with two photo cells is disturbed and the unbalance signal changes the drive speeds algebraically, acceleration occurs (or slowdown) installation movements relative to the source of radiant energy (the Sun). After working out the angle of mismatch, the installation comes to its original state, ensuring the optimal operation of the solar system. We believe that the installation has a certain constant angular velocity and the sensor produces a change in this angular velocity. In the new stationary mode, the movement occurs with a new angular velocity constant until a new error occurs, which will lead to the need. To change the value of the velocity again, thus

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in the state of dynamic equilibrium of dates, the peak actually does not work. This is a significant difference from short-lived sensors of similar purpose. The elements are not covered that SNI _$ zhaet light interference to a minimum. For the same purpose, the lower part of the housing 7 is made opaque.

This design provides the contrast of illumination of photosensitive elements, both in normal mode when there is a small mismatch no. In the direction of the axis, and in the big mismatch mode (the forced mode corresponding to the angle α ι), which is achieved

clear drive operation.

Opaque body parts can be mirrored, which will reduce the heating of the entire structure.

Thus, due to the presence of the screen, the accuracy of the sensor increases, since 20 the magnitude of the imbalance signal increases dramatically, and the presence of the case will increase the service life of the sensor.

Claims (2)

Claim 1. Sensor tracking solar installation, containing light-sensitive elements, located on the substrate and separated by opaque partitions, characterized in that, in order to improve accuracy, the sensor additionally contains a screen mounted above the partitions. '. ' 2. Sensor π. I, characterized in that it comprises a housing made in the lower part of the board, opaque and mounted on a substrate.