Voltage frequency conversion circuit for photometric system

Abstract

The invention discloses a voltage frequency conversion circuit for a photometric system. The voltage frequency conversion circuit is characterized in that the comparison input pin of a converter is connected with a second resistor; a timing circuit pin of the converter is connected with a third resistor and a second capacitor respectively; the third resistor and the power end of the converter are connected with a 9V power supply through a first inductor, and the 9V power supply is further connected with a third capacitor; the frequency output pin of the converter is connected with a fourth resistor, the fourth resistor is connected with the base electrode of a second triode, the emitting electrode of the second triode is connected with a fifth resistor and a sixth resistor respectively, and the fifth resistor is connected to the ground; the collector electrode of the second triode is connected with a seventh resistor which is connected with the 9V power supply, the sixth resistor is connected with an eighth resistor and the base electrode of a first triode respectively, the emitting electrode of the first triode is connected to the ground, and the collector electrode of the first triode is connected with a ninth resistor and outputs pulse signals at the same time. According to the voltage frequency conversion circuit, sunlight conversion frequency is improved, accuracy is high, the circuit is simple in structure, and various requirements in practical application are met.

Description

technical field [0001] The invention relates to the field of photometric systems, in particular to a voltage-frequency conversion circuit used in the photometric system. Background technique [0002] Due to the rotation of the earth, compared with a solar photovoltaic power generation system at a fixed location, the sun rises and sets every day in spring, summer, autumn and winter. The sun, the power generation efficiency will reach the best state. [0003] At present, the general solar photometry system in the world needs to calculate the angle of the sun at different times of each day of the year according to the longitude and latitude of the placement point, measure the maximum light, and convert the measured sunlight into a voltage signal to amplify , and converted to a pulse signal. [0004] The inventor finds that there are at least the following shortcomings and deficiencies in the prior art in the process of realizing the present invention: [0005] Existing volta...

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Problems solved by technology

[0005] Existing voltage-frequency conversion circuits are realized by circuits such as A / D converters, linear frequency modems, and long-time integrators. The circuit structure is complex, and the converted pulse signal cannot be well applied to the follow-up circuit of the photometry system. , which reduces the conversion efficiency of sunlight and cannot meet various needs in practical applications

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