Angle measurement method for solar tracking and solar orientation sensor

The invention relates to an angle measurement method for solar tracking and a solar orientation sensor, and belongs to the field of solar energy application. The solar orientation sensor has a pyramid-type layout and comprises a pyramid-type structure, four symmetrically arranged photoelectric sensors and connector sockets. By the adoption of the cosine law of illumination, the angle measurement method comprises the following steps of: letting parallel lights radiated from the sun shine on a set of photoelectric sensors arranged on the symmetric inclined planes of the pyramid-type housing in the orientation sensor, measuring output signal differences of the set of photoelectric sensors, calculating the angle between the incident lights and a central axis of the pyramid-type housing by arcsine. A tracking control system comprises signal processing circuits, power amplification circuits, a pulse oscillation circuit, ON-OFF control circuits, a stepping motor driver, stepping motors and a rotational station. The orientation sensor provided by the invention has advantages of wide field range and simple angle calculation method, and can be used to realize automatic crude tracking of the solar target within the wide field range with the cooperation of the tracking control system.