Photoelectric signal acquisition circuit
A technology for collecting circuits and photoelectric signals, which is applied in the field of solar energy utilization, and can solve problems such as tracking devices not being able to align with the sun, increasing costs, and misoperation of actuators, etc.
Inactive Publication Date: 2011-11-09
韦军
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Problems solved by technology
Generally speaking, the photoelectric tracking sensitivity is high, and the structural design is more convenient, but it is greatly affected by the weather. If the sun is covered by dark clouds for a long period of time, the sun's rays often cannot shine on the silicon photoelectric tube, which will cause The tracking device cannot be aimed at the sun, and sometimes even cause malfunction of the actuator
[0010] As mentioned above, among various types of trackers, the accuracy of purely mechanical trackers is low, and the purpose of tracking is to increase energy density. If the accuracy is low, the tracking efficiency is low, and the cost is additionally increased. In the device Adding a tracker loses its original meaning
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[0014] attached figure 1 The voltage signal of OV in the middle is the voltage signal after the voltage is boosted, and OV1 is the output acquisition voltage after being followed by the LM358, which is also the voltage value directly collected by the single-chip analog circuit A / D. The built-in 10-bit precision A / D acquisition circuit of DSPIC30F3010 can easily realize various forms of signal acquisition by setting internal registers. Because this single-chip microcomputer has the performance of DSP, it has strong functions in mathematical operations, and the data throughput is large, so it can collect OV1 signals in real time and quickly. attached figure 2 Shown is the PROTEL99SE simulation diagram of OV1 output signal.
[0015] The collected signal must be processed through the following formula process, and finally its actual value can be obtained. The acquisition of AC power frequency signals is generally calculated based on its effective value, and the calculation for...
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The invention discloses a photoelectric signal acquisition circuit, which has the characteristic of simplicity, meets the requirement of accuracy and has the data acquisition accuracy level of 0.5 percent. The photoelectric signal acquisition circuit mainly comprises a photoelectric signal acquisition component, an integrated operational amplifier and a reference voltage source circuit. A voltage signal of OV (Output Voltage) is a voltage signal subjected to voltage boost; and OV1 is acquired voltage which is output after LM358 tracking and is also a voltage value which is directly acquired by a singlechip analog circuit A / D (Analog / Digital). A ten-bit accuracy A / D acquisition circuit built in DSPIC30F3010 can extremely conveniently realize signal acquisition in various forms through an internal register. V1 is a feedback value of analog output alternating voltage, V2 is a direct current voltage source of +5V and V3 is a direct current voltage source of +12V; LM358 is a simple integrated operational amplifier; and 78L05 is a reference voltage source circuit.
Description
Technical field: [0001] The invention relates to solar energy utilization technology, in particular to the field of signal processing in solar tracking systems. Background technique: [0002] When non-renewable energy sources such as electricity, coal, and oil are running out frequently, and energy issues have increasingly become a bottleneck restricting the development of the international society and economy, more and more countries have begun to implement the "Sunshine Plan" to develop solar energy resources and seek new impetus for economic development. As a renewable new energy source, solar energy has attracted more and more attention. Photovoltaic power generation is a way of utilizing solar energy, and it has been widely valued because of its energy-saving and environmental protection effects. [0003] At present, various types of solar tracker devices, from simple to complex, are mainly divided into two categories, namely, mechanical systems and electronic control ...
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IPC IPC(8): G05D3/12
Inventor 韦军
Owner 韦军