CN221238514U - Circuit for measuring solar radiation intensity based on photoelectric principle - Google Patents
Circuit for measuring solar radiation intensity based on photoelectric principle Download PDFInfo
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- CN221238514U CN221238514U CN202322890289.6U CN202322890289U CN221238514U CN 221238514 U CN221238514 U CN 221238514U CN 202322890289 U CN202322890289 U CN 202322890289U CN 221238514 U CN221238514 U CN 221238514U
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- 230000005855 radiation Effects 0.000 title claims abstract description 39
- 238000001914 filtration Methods 0.000 claims abstract description 12
- 238000005070 sampling Methods 0.000 claims abstract description 9
- 239000003990 capacitor Substances 0.000 claims description 33
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 claims description 4
- 229910052710 silicon Inorganic materials 0.000 claims description 4
- 239000010703 silicon Substances 0.000 claims description 4
- 230000005693 optoelectronics Effects 0.000 claims 1
- 238000005259 measurement Methods 0.000 abstract description 4
- 238000010586 diagram Methods 0.000 description 4
- 230000007613 environmental effect Effects 0.000 description 2
- 238000012544 monitoring process Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000010354 integration Effects 0.000 description 1
- 230000002262 irrigation Effects 0.000 description 1
- 238000003973 irrigation Methods 0.000 description 1
- 230000000737 periodic effect Effects 0.000 description 1
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Abstract
The utility model relates to a circuit for measuring solar radiation intensity based on a photoelectric principle, which comprises: the device comprises a singlechip, a photosensitive device and a signal amplifying and filtering circuit; the non-inverting input end of the first operational amplifier in the signal amplifying and filtering circuit is connected with the positive output end of the photosensitive device, is connected with the resistor of the non-inverting end in series and then is grounded, the inverting input end of the first operational amplifier is connected with the negative output end of the photosensitive device, is connected with the resistor of the inverting end in series and then is connected with the output end of the first operational amplifier, the inverting input end of the first operational amplifier is connected with the output end, the non-inverting input end of the first operational amplifier is connected with the output end of the first operational amplifier after being connected with a current limiting resistor in series, the input end of the filter circuit is connected with the output end of the second operational amplifier, and the output end of the filter circuit is connected with the AD signal sampling input end of the singlechip. The utility model realizes the accurate measurement of the solar radiation intensity, and has the effects of quick and accurate measurement of solar radiation, simple circuit, easy realization and low cost.
Description
Technical Field
The utility model relates to the technical field of environmental monitoring, in particular to a circuit for measuring solar radiation intensity based on a photoelectric principle.
Background
In the meteorological field, radiation sensors may be used to measure the total amount of solar radiation to determine meteorological conditions, such as the number of hours of sunlight and the intensity of sunlight. In the agricultural field, radiation sensors may be used to measure the total amount of solar radiation to help farmers optimize crop planting and irrigation plans. In the field of environmental monitoring, radiation sensors may be used to monitor the total amount of solar radiation to determine the health of the environment, such as atmospheric pollution and climate change, etc.
At present, the solar radiation measurement mode comprises a thermocouple sensor and a thermopile sensor, wherein the output stability of the thermocouple sensor is poor, the thermopile sensor needs to be calibrated regularly, the response speed is low, the cost is high, and the instantaneity is poor.
Disclosure of utility model
Aiming at the technical defects of poor output stability, periodic calibration, low response speed, high cost and poor real-time performance of a thermopile sensor in the prior art, the utility model provides a circuit for measuring solar radiation intensity based on a photoelectric principle.
The utility model provides a circuit for measuring solar radiation intensity based on a photoelectric principle, which comprises: the device comprises a chip microcomputer, a photosensitive device and a signal amplifying and filtering circuit;
The signal amplifying and filtering circuit comprises a first operational amplifier, a second operational amplifier and a filtering circuit; the non-inverting input end of the first operational amplifier is connected with the positive output end of the photosensitive device and is grounded after being connected with the resistor of the non-inverting end in series, and the inverting input end of the first operational amplifier is connected with the negative output end of the photosensitive device and is connected with the output end of the first operational amplifier after being connected with the resistor of the inverting end in series; the inverting input end and the output end of the first operational amplifier are connected to form an emitter follower, and the non-inverting input end of the first operational amplifier is connected with a current limiting resistor in series and then is connected to the output end of the first operational amplifier; the input end of the filter circuit is connected with the output end of the second operational amplifier, and the output end of the filter circuit is connected with the AD signal sampling input end of the singlechip.
In the circuit for measuring solar radiation intensity based on the photoelectric principle, the filter circuit is a CRC filter circuit, and comprises a first filter capacitor, a filter resistor and a second filter capacitor which are sequentially arranged according to the current flow direction, wherein the first end of the first filter capacitor is used as the input end of the filter circuit to be connected with the output end of the second operational amplifier, the second end of the first filter capacitor is grounded, one end of the filter resistor is connected with the first end of the first filter capacitor, the other end of the filter resistor is connected with the first end of the second filter capacitor, the second end of the second filter capacitor is grounded, and the first end of the second filter capacitor is used as the output end of the filter circuit.
In the circuit for measuring solar radiation intensity based on the photoelectric principle, the first filter capacitor is 0.1 mu F, the filter resistor is 4.7KΩ, and the second filter capacitor is formed by connecting two capacitors with the sizes of 0.1 mu F and 10 mu F in parallel.
In the circuit for measuring solar radiation intensity based on the photoelectric principle of the utility model, the first operational amplifier and the second operational amplifier are LM285.
In the circuit for measuring solar radiation intensity based on the photoelectric principle, the photosensitive device is a silicon photocell.
In the circuit for measuring solar radiation intensity based on the photoelectric principle, the in-phase end resistor is 200 omega, and the opposite-phase end resistor is formed by connecting a potentiometer with 1K ohm and a resistor with 200 omega in series; one end of a resistor of 200Ω in the reversed phase end resistor is connected with the output end of the first operational amplifier, the other end of the resistor is connected with one of the fixed ends of the potentiometer, and the movable end of the potentiometer is connected with the reversed phase input end of the first operational amplifier.
In the circuit for measuring solar radiation intensity based on the photoelectric principle, the singlechip is STM8S003F3P6, and the AD signal sampling input end is the 14 th pin of STM8S003F3P 6.
The circuit for measuring solar radiation intensity based on the photoelectric principle further comprises an RS485 communication circuit, wherein the RS485 communication circuit is realized by adopting a chip SP3485, pins 1 and 4 of the SP3485 are respectively connected with pins 3 and 2 of STM8S003F3P6, and pins 2 and 3 of the SP3485 are connected together and then connected to pin 10 of STM8S003F3P 6; the 6 th pin and the 7 th pin of the SP3485 are respectively connected with the output resistor and then serve as positive communication connection ends and negative communication connection ends of the RS485 communication circuit, the 6 th pin of the SP3485 is connected with a pull-up resistor in series and then is connected with a positive power supply, and the 7 th pin of the SP3485 is connected with a pull-down resistor in series and then is grounded.
In the circuit for measuring solar radiation intensity based on the photoelectric principle, the output resistance is 51Ω, the pull-up resistance and the pull-down resistance are 47Ω, and the positive power supply is 5V.
The beneficial effects of using the utility model are as follows:
In the circuit for measuring the solar radiation intensity based on the photoelectric principle, when solar radiation is emitted into the photosensitive device, the photosensitive device generates a micro current signal, the micro current signal is sampled by the singlechip after being amplified and filtered, and the sampled voltage signal is in direct proportion to the intensity of the solar radiation, so that the accurate measurement of the solar radiation intensity is realized.
Drawings
Fig. 1 is a schematic circuit diagram of an embodiment of a signal amplifying and filtering circuit of the present utility model.
Fig. 2 is a schematic circuit diagram of a single chip microcomputer portion of the present utility model.
Fig. 3 is a schematic circuit diagram of the RS485 communication circuit of the utility model.
Fig. 4 is a schematic circuit diagram of the power supply circuit of the present utility model.
Detailed Description
In order to make the objects, technical solutions and advantages of the present technical solution more apparent, the present technical solution is further described in detail below in conjunction with the specific embodiments. It should be understood that the description is only illustrative and is not intended to limit the scope of the present technical solution.
Referring to fig. 1, the circuit for measuring solar radiation intensity based on the photoelectric principle of the present embodiment includes: the device comprises a singlechip, a photosensitive device and a signal amplifying and filtering circuit.
The photosensitive device is a silicon photocell, and generates current when light is irradiated.
The signal amplifying and filtering circuit comprises a first operational amplifier U5A, a second operational amplifier U5B and a filtering circuit. The first operational amplifier U5A and the second operational amplifier U5B are LM285, the non-inverting input end of the first operational amplifier U5A is connected with the positive output end+ of the photosensitive device and is connected with the non-inverting end resistor R4 in series and then grounded, the inverting input end of the first operational amplifier U5A is connected with the negative output end-of the photosensitive device, and the inverting end resistor in series is connected with the output end of the first operational amplifier U5A.
The inverting input end and the output end of the first operational amplifier U5A are connected to form an emitter follower, and the non-inverting input end of the first operational amplifier U5A is connected with a current limiting resistor R5 in series and then is connected to the output end of the first operational amplifier U5A; the input end of the filter circuit is connected with the output end of the second operational amplifier U5B, and the output end of the filter circuit is connected with the AD signal sampling input end of the singlechip. The current limiting resistor R5 is formed by connecting a potentiometer R9 with the resistance of 1 Kohm and a resistor R23 with the resistance of 200 omega in series, wherein the resistance R4 at the same phase end is 200Ω; one end of a 200 ohm resistor R23 in the inverting end resistor is connected with the output end of the first operational amplifier U5A, the other end of the resistor R23 is connected with one of the fixed ends of the potentiometer R9, and the movable end of the potentiometer R9 is connected with the inverting input end of the first operational amplifier U5A.
The filter circuit is a CRC filter circuit, and comprises a first filter capacitor C5, a filter resistor R1 and a second filter capacitor which are sequentially arranged according to the current flow direction, wherein the first end of the first filter capacitor C5 is used as the input end of the filter circuit to be connected with the output end of a second operational amplifier U5B, the second end of the first filter capacitor C5 is grounded, one end of the filter resistor R1 is connected with the first end of the first filter capacitor C5, the other end of the filter resistor R1 is connected with the first end of the second filter capacitor, the second end of the second filter capacitor is grounded, and the first end of the second filter capacitor is used as the output end of the filter circuit. In this embodiment, the first filter capacitor C1 is 0.1 μf, the filter resistor R1 is 4.7kΩ, and the second filter capacitor is formed by connecting two capacitors C19 and C6 of 0.1 μf and 10 μf in parallel.
In this embodiment, the single chip microcomputer is STM8S003F3P6, and the AD signal sampling input end is the 14 th pin of STM8S003F3P 6.
The utility model also comprises an RS485 communication circuit, wherein the RS485 communication circuit is realized by adopting a chip SP3485, pins 1 and 4 of the SP3485 are respectively connected with pins 3 and 2 of STM8S003F3P6, and pins 2 and 3 of the SP3485 are connected together and then connected with pin 10 of STM8S003F3P 6; the 6 th pin and the 7 th pin of the SP3485 are respectively connected with the output resistors R11 and R10 and then serve as positive communication connection ends 485+ and 485-negative communication connection ends of the RS485 communication circuit, the 6 th pin of the SP3485 is connected with a pull-up resistor R8 in series and is connected with a positive power supply, and the 7 th pin of the SP3485 is connected with a pull-down resistor R6 in series and is grounded. The output resistors R11 and R10 are 51Ω, the pull-up resistor R8 and the pull-down resistor R6 are 47Ω, and the positive power supply is 5V.
The power supply circuit of this embodiment refers to fig. 4, which is used to convert the input 12V power supply into the operating voltage required by the other circuits in the circuit.
The working principle of the embodiment is as follows: the silicon photocell receives sunlight irradiation to generate micro current, the micro current passes through a circuit where the first operational amplifier U5A is located, a voltage signal is output, the output voltage signal is i (R4+R23+R9), the emitter follower circuit is used as buffer between the voltage signal output by the first operational amplifier U5A and the sampling input end of the AD signal, the interference of AD sampling on a signal source can be reduced, the filter circuit can filter some external interference, the single chip microcomputer can sample the obtained voltage signal to obtain the solar radiation intensity through calculation, then the time integration is carried out, a radiation quantity can be obtained, and the measured data can be transmitted back to the background server through the 485 communication circuit.
The foregoing is merely exemplary of the present utility model, and those skilled in the art can make many variations in the specific embodiments and application scope according to the spirit of the present utility model, as long as the variations do not depart from the spirit of the utility model.
Claims (9)
1. A circuit for measuring solar radiation intensity based on the principle of optoelectronics, comprising: the device comprises a singlechip, a photosensitive device and a signal amplifying and filtering circuit;
The signal amplifying and filtering circuit comprises a first operational amplifier, a second operational amplifier and a filtering circuit; the non-inverting input end of the first operational amplifier is connected with the positive output end of the photosensitive device and is grounded after being connected with the resistor of the non-inverting end in series, and the inverting input end of the first operational amplifier is connected with the negative output end of the photosensitive device and is connected with the output end of the first operational amplifier after being connected with the resistor of the inverting end in series; the inverting input end of the first operational amplifier is connected with the output end, and the non-inverting input end of the first operational amplifier is connected with a current limiting resistor in series and then is connected to the output end of the first operational amplifier; the input end of the filter circuit is connected with the output end of the second operational amplifier, and the output end of the filter circuit is connected with the AD signal sampling input end of the singlechip.
2. The circuit for measuring solar radiation intensity based on the photoelectric principle according to claim 1, wherein the filter circuit is a CRC-type filter circuit, and comprises a first filter capacitor, a filter resistor and a second filter capacitor which are sequentially arranged according to the current flow direction, wherein the first end of the first filter capacitor is used as the input end of the filter circuit to be connected with the output end of the second operational amplifier, the second end of the first filter capacitor is grounded, one end of the filter resistor is connected with the first end of the first filter capacitor, the other end of the filter resistor is connected with the first end of the second filter capacitor, the second end of the second filter capacitor is grounded, and the first end of the second filter capacitor is used as the output end of the filter circuit.
3. The circuit for measuring solar radiation intensity based on the photoelectric principle according to claim 2, wherein the first filter capacitor is 0.1 μf, the filter resistor is 4.7kΩ, and the second filter capacitor is formed by connecting two capacitors of 0.1 μf and 10 μf in parallel.
4. The circuit for measuring solar radiation intensity based on the photoelectric principle according to claim 1, wherein the first operational amplifier and the second operational amplifier are LM285.
5. The circuit for measuring solar radiation intensity based on the photoelectric principle according to claim 1, wherein the photosensitive device is a silicon photocell.
6. The circuit for measuring solar radiation intensity based on the photoelectric principle according to claim 1, wherein the in-phase end resistor is 200 Ω, and the opposite-phase end resistor is formed by connecting a potentiometer with 1K ohm and a resistor with 200 Ω in series; one end of a resistor of 200Ω in the reversed phase end resistor is connected with the output end of the first operational amplifier, the other end of the resistor is connected with one of the fixed ends of the potentiometer, and the movable end of the potentiometer is connected with the reversed phase input end of the first operational amplifier.
7. The circuit for measuring solar radiation intensity based on the photoelectric principle according to claim 1, wherein the single chip microcomputer is STM8S003F3P6, and the AD signal sampling input end is a 14 th pin of STM8S003F3P 6.
8. The circuit for measuring solar radiation intensity based on the photoelectric principle according to claim 7, further comprising an RS485 communication circuit, wherein the RS485 communication circuit is realized by a chip SP3485, pins 1 and 4 of the SP3485 are respectively connected with pins 3 and 2 of STM8S003F3P6, and pins 2 and 3 of the SP3485 are connected together and then connected to pin 10 of STM8S003F3P 6; the 6 th pin and the 7 th pin of the SP3485 are respectively connected with the output resistor and then serve as positive communication connection ends and negative communication connection ends of the RS485 communication circuit, the 6 th pin of the SP3485 is connected with a pull-up resistor in series and then is connected with a positive power supply, and the 7 th pin of the SP3485 is connected with a pull-down resistor in series and then is grounded.
9. The circuit for measuring solar radiation intensity based on the photoelectric principle according to claim 8, wherein the output resistance is 51Ω, the pull-up resistance and the pull-down resistance are 47Ω, and the positive power supply is 5V.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322890289.6U CN221238514U (en) | 2023-10-25 | 2023-10-25 | Circuit for measuring solar radiation intensity based on photoelectric principle |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322890289.6U CN221238514U (en) | 2023-10-25 | 2023-10-25 | Circuit for measuring solar radiation intensity based on photoelectric principle |
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| Publication Number | Publication Date |
|---|---|
| CN221238514U true CN221238514U (en) | 2024-06-28 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202322890289.6U Active CN221238514U (en) | 2023-10-25 | 2023-10-25 | Circuit for measuring solar radiation intensity based on photoelectric principle |
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| CN (1) | CN221238514U (en) |
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- 2023-10-25 CN CN202322890289.6U patent/CN221238514U/en active Active
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