Control method with light intensity and temperature as parameters

Abstract

The control method using light intensity and temperature as parameters belongs to the application field of automatic control technology. The method includes light intensity parameter I, temperature parameter T, operation stop period TC and duty cycle DC of the control object; the operation and prohibition of the control object are determined by comparing the light intensity signal Itn with the threshold value Ith; the average value Im of the light intensity signal Adjust the cycle TC of running stop; adjust the duty cycle DC and the stop time with the difference ΔT between the collected sequence temperature value Ti and its peak value Tmax and valley value Tmin. This method takes the control of the circulating pump of the solar heat collection system as an application example (but it does not constitute an application limitation). In the application, only one temperature sensor and one photosensitive sensor are needed. The temperature sensor is placed in a convenient position in the circulation loop, and the photosensitive sensor can be Flexible placement, according to the control conditions, it can be placed in a place related to the light intensity and sunlight changes. Compared with the common temperature difference cycle control method, it saves the installation of remote temperature sensors and wiring construction, and is easy to construct and maintain.

Description

(1) Technical field [0001] The invention relates to a control method using light intensity and temperature as parameters, belonging to the application field of automatic control technology. (2) Background technology [0002] In production and life, mechanical power equipment is often used to achieve predetermined purposes. For example, the circulation pump used in solar heat collection systems belongs to this type of mechanical power equipment. The operation of this type of equipment often requires certain control conditions. Taking the solar heat collection system as an example, as the sun rises, the solar radiation energy absorbed by the heat collector is converted into heat energy. At this time, liquid circulation is required to transmit heat energy to the In energy storage or energy conversion equipment. And when the sun goes down, the temperature of the heat collector is gradually lower than the temperature of the energy storage or heat exchange equipment. At this time...

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Problems solved by technology

This method is direct and effective, but it is necessary to set temperature sensors on the collector and in the energy storage device respectively, and connect them to the controller through cables

Since the heat collectors are installed outdoors in a sunny place, the energy storage equipment is generally placed indoors, and the controllers are installed close to the energy storage equipment, the cables connected to the temperature sensors on the heat collectors are often relatively long and need to be worn. Wall, wiring construction is more troublesome, especially once a fault occurs after it is put into operation, it is also very difficult to find the fault point and repair sensors and cables

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