CN110836851A - Integrated multi-wavelength photoelectric signal processing circuit - Google Patents
Integrated multi-wavelength photoelectric signal processing circuit Download PDFInfo
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Abstract
The invention discloses an integrated multi-wavelength photoelectric signal processing circuit, comprising: a light source module: arranging more than two light sources, wherein each light source is used for emitting light with a specific wavelength; the photoelectric module: the light source module is used for sensing light emitted by the light source module, converting the light into an electric signal and converting the electric signal into a digital signal; a control module: the light source module is used for controlling the light source module to select the light source to enable the light source to emit light with specific wavelength, and is used for receiving the digital signal of the photoelectric module and processing the digital signal. It is different from the traditional method that a mixed light is separated and screened into the light with the required wavelength by using a multipath light-splitting element and a multipath signal receiving component; therefore, the invention optimizes the traditional circuit and has the advantages of simple structure and easy maintenance.
Description
Technical Field
The invention relates to an integrated multi-wavelength photoelectric signal processing circuit.
Background
In the field of solution inspection, for example, a circuit for colorimetric measurement separates different color lights by a light splitter after measuring light penetrates through a solution to be measured, and then performs photoelectric conversion, amplification and AD conversion and later analysis or calculation processing after irradiating the separated light signals on the solution to be measured.
In the above, due to the design of multipath light splitting elements and multipath signal receiving, the structure is too redundant, and the too complex structure is easy to damage and is not beneficial to maintenance.
Disclosure of Invention
The present invention overcomes at least one of the above-identified deficiencies in the prior art and provides an integrated multi-wavelength optical electrical signal processing circuit.
In order to solve the technical problems, the technical scheme of the invention is as follows: an integrated multi-wavelength optoelectronic signal processing circuit comprising: a light source module: arranging more than two light sources, wherein each light source is used for emitting light with a specific wavelength; the photoelectric module: the light source module is used for sensing light emitted by the light source module, converting the light into an electric signal and converting the electric signal into a digital signal;
a control module: the light source module is used for controlling the light source module to select the light source to enable the light source to emit light with specific wavelength, and is used for receiving the digital signal of the photoelectric module and processing the digital signal.
Above, light source module and photovoltaic module all connect in the control module, and light source module and photovoltaic module correspond.
Integrating a plurality of light sources on a light source module, wherein each light source can emit light with one wavelength; as for the light of which kind of wavelength of requirement, can realize through the work of the corresponding light source of control module control, let light shine behind the specified light surveyed solution (transparent container splendid attire usually, for example test tube), light shines photoelectric module after passing this solution, and light is caught by photoelectric module, converts this light into digital signal after converting the signal of telecommunication into, transmits digital signal to control module again for later analysis or calculation processing. The invention integrates a plurality of light sources which can emit different wavelengths into one, and only one light source with one wavelength needs to be controlled to work when in use; compared with the traditional design which needs multipath light splitting elements and multipath signal receiving, the circuit provides a novel design, light sources with different wavelengths are concentrated at one position, and the light source with a certain wavelength is controlled to emit light for use independently according to the requirement; it is different from the traditional method that a mixed light is separated and screened into the light with the required wavelength by using a multipath light-splitting element and a multipath signal receiving component; therefore, the invention optimizes the traditional circuit and has the advantages of simple structure and easy maintenance.
In some embodiments, the light source module includes an LED lamp and an LED lamp driving chip;
the LED lamp is electrically connected to the LED lamp driving chip, and the LED lamp driving chip is connected to the control module.
By adopting the special LED lamp driving chip, the LED lamp can achieve the effect of a constant current, the LED lamp can be ensured to emit light with stable wavelength, and the precision of a colorimetric link is improved.
In some embodiments, the LED lamps are twelve, twelve corresponding to twelve wavelengths of light; the anodes of the LED lamps are connected in a positive mode, and the cathodes of the LED lamps are respectively connected to the signal output ends of the LED lamp driving chips.
According to the requirement, the circuit of the invention designs 12 LED lamps corresponding to the wavelengths, and the light source corresponding to the required wavelength can be selected to emit light according to the requirement.
In some embodiments, the photovoltaic module comprises a photosensitive device, a current-to-voltage conversion circuit, and an a/D conversion circuit; a photosensitive device: the light source module is used for sensing light emitted by the light source module and converting the light into a current signal; current-voltage conversion circuit: for converting the current signal into a voltage signal; an A/D conversion circuit: for converting the voltage signal into a digital signal and transmitting the digital signal to a control module.
The light source module is electrically connected with the light source module, the light source module is used for emitting light, the light is converted into a current signal, the electric signal flows through the current-voltage conversion circuit (which can be a resistor) and then is converted into a voltage signal, and the voltage signal is converted into a digital signal through the A/.
In some embodiments, the photosensitive device is a photodiode.
In some embodiments, further comprising an amplification circuit for amplifying the voltage signal; the current-voltage conversion circuit is electrically connected with the amplifying circuit, and the amplifying circuit is electrically connected with the A/D conversion circuit.
The input end of the amplifying circuit is connected with the output end of the current-voltage conversion circuit, and the output end of the amplifying circuit is connected with the A/D conversion circuit; the voltage converted by the current-voltage conversion circuit is amplified by the amplifying circuit and then converted into a digital signal.
Drawings
FIG. 1 is a schematic diagram of an integrated multi-wavelength optoelectronic signal processing circuit according to an embodiment of the present invention;
FIG. 2 is a schematic diagram of an optoelectronic module of the integrated multi-wavelength optoelectronic signal processing circuit of FIG. 1;
FIG. 3 is a schematic diagram of the connection between the LED light source and the LED lamp driving chip of the integrated multi-wavelength photoelectric signal processing circuit shown in FIG. 1;
FIG. 4 is a schematic diagram of an integrated multi-wavelength optoelectronic signal processing circuit according to another embodiment of the present invention.
Detailed Description
The drawings are for illustrative purposes only and are not to be construed as limiting the patent; for the purpose of better illustrating the embodiments, certain features of the drawings may be omitted, enlarged or reduced, and do not represent the size of an actual product; it will be understood by those skilled in the art that certain well-known structures in the drawings and descriptions thereof may be omitted.
As shown in fig. 1, an integrated multi-wavelength optoelectronic signal processing circuit includes: the light source module 10: arranging more than two light sources, wherein each light source is used for emitting light with a specific wavelength; the photovoltaic module 20: for sensing the light emitted by the light source module 10, converting the light into an electrical signal, and converting the electrical signal into a digital signal; the control module 50: for controlling the light source module 10 to select a light source to emit light with a specific wavelength, and for receiving the digital signal of the optoelectronic module 20 and processing the digital signal.
The light source module and the photoelectric module are electrically connected to the control module and correspond to each other (namely, the used time-waiting photoelectric module can receive light rays of the light source module).
In the invention, a plurality of light sources are integrated on a light source module, and each light source can emit light rays with one wavelength (namely, different light sources correspond to light rays with different wavelengths); as for the light of which kind of wavelength of requirement, can realize through the work of the corresponding light source of control module control, let this light shine behind the surveyed solution (transparent container splendid attire usually, for example test tube) after sending specific light, light shines photoelectric module after passing this solution, and light is caught by photoelectric module, converts this light into digital signal after the signal of telecommunication, transmits digital signal for control module again to supply the analysis or the calculation processing in later stage. The invention integrates a plurality of light sources which can emit different wavelengths into one, and only one light source with one wavelength needs to be controlled to work when in use; compared with the traditional design which needs multipath light splitting elements and multipath signal receiving, the circuit provides a novel design, light sources with different wavelengths are concentrated at one position, and the light source with a certain wavelength is controlled to emit light for use independently according to the requirement; it is different from the traditional method that a mixed light is separated and screened into the light with the required wavelength by using a multipath light-splitting element and a multipath signal receiving component; therefore, the invention optimizes the traditional circuit and has the advantages of simple structure and easy maintenance.
One embodiment of the above light source module 10 may be: the light source module 10 includes an LED lamp and an LED lamp driving chip; the LED lamp is electrically connected to the LED lamp driving chip, and the LED lamp driving chip is connected to the control module 50. The LED lamps can be twelve, and the twelve LED lamps correspond to light with twelve wavelengths; the anodes of the LED lamps are connected in a positive mode, and the cathodes of the LED lamps are respectively connected to the signal output ends of the LED lamp driving chips. The photosensitive device may be a photodiode (photodiode).
Referring to fig. 3, the LED lamp driving chip may be U1: the TLC5940 type chip can be known as the figure, twelve LED lamp anodes are connected in a common anode mode, and twelve LED lamp cathodes are respectively connected with a signal output end OUT of an LED lamp driving chip; the TLC5940 type chip can control the on-off and current value of each path of monochromatic light source, and the light source circuit can be connected with the control module 50 through a dupont socket (or other communication interfaces): in one implementation: the chip U1 (TLC 5940) 2 pin receives the signal (SDATA serial signal) of the control module 50, the output current of the pins 5-16 of the chip U1, and the 3 pin signal (SCLK signal from the control module 50) of the chip U1 controls the LED lamp to be turned on or off, so as to achieve the purpose of controlling the LED lamp to be turned on or off and controlling the constant current, and the constant current value of each LED chip is independently controlled.
Preferably, the light source module may be twelve LED lamps soldered on the circuit board, and the wavelengths corresponding to the light emission of the LEDs are 340nm, 380nm, 405nm, 450nm, 480nm, 505nm, 546nm, 570nm, 630nm, 670nm, 700nm, and 750 nm.
One embodiment of the above photovoltaic module 20 is: the photovoltaic module 20 comprises a photosensitive device 201, a current-voltage conversion circuit 202 and an A/D conversion circuit 204 (an AD conversion chip of a TLC2551 model can be adopted); photosensitive device 201: for sensing the light emitted by the light source module 10 and converting the light into a current signal; current-voltage conversion circuit 202: for converting the current signal into a voltage signal; a/D conversion circuit 204: for converting the voltage signal into a digital signal and transmitting the digital signal to the control module 50.
The current-voltage conversion circuit 202 may employ an operational amplifier (which may be used for its comparison function, or may be a resistor, and the current is converted into a voltage signal by taking the voltage across the resistor through the resistor).
The light source module is electrically connected with the light source module, the light source module is electrically connected with the light source module. The control module 50 controls the a/D conversion circuit 204 to work in order, receives the digital signal transmitted by the a/D conversion circuit 204, and sends the digital signal to the upper computer after calculation processing, so as to present the result (such as graph and number) in a certain form.
To explain the working principle of the present invention more clearly, the following is further illustrated by taking as an example a solution requiring a wavelength of 450nm to be tested: the control module 50 (CPU controller) receives an instruction (from an upper computer), controls the LED driving chip U1 (TLC 5940), sends a predetermined control current value to the LED driving chip U1 (TLC 5940), gates the LED lamp of 450nm on, emits light with a wavelength of 450nm, waits for a certain period (generally set to 2 ms), controls the a/D conversion circuit 204 to operate, and controls the control module 50 to calculate and process a digital signal by itself or returns the value of the a/D conversion circuit 204 to the upper computer for calculation and processing, so as to obtain a result; the coordination work of the control module 50, the LED driving chip, the LED lamp and the a/D conversion circuit 204 can be completed by program assistance, and the control program is poured into the control module 50 for debugging and application.
Preferably, the voltage signal amplifying circuit further comprises an amplifying circuit 203 for amplifying the voltage signal; the current-voltage conversion circuit 202 is electrically connected to the amplifier circuit 203, and the amplifier circuit 203 is electrically connected to the a/D conversion circuit 204. The amplifying circuit may be an operational amplifier. The input end of the amplifying circuit is connected with the output end of the current-voltage conversion circuit, and the output end of the amplifying circuit is connected with the A/D conversion circuit; the voltage converted by the current-voltage conversion circuit is amplified by the amplifying circuit and then converted into a digital signal.
More specifically, as shown in fig. 4, in an embodiment of the integrated multi-wavelength photoelectric signal processing circuit of the present invention, after light with a certain wavelength passes through a solution to be tested, a photoelectric module (not illustrated) irradiates the photosensitive diode D1 (which may be an S1133 series photosensitive diode), the photosensitive diode D1 converts the light into a current signal, the current signal enters an amplification operator U3 (a specific model may be AD795 JN), the amplification operator U3 outputs a voltage signal (the current-voltage conversion circuit may also be implemented by a resistor, the current passes through a resistor circuit, the resistor obtains a voltage, and the voltage is collected), the voltage enters another amplification operator U7 (a specific model may be AD 823), then enters an a/D conversion module to be converted into a digital signal, and finally is collected by a control module, and is subjected to calculation processing, or the digital signal is sent to an upper computer for calculation processing, and obtaining a result.
IN the above, the positive and negative voltages required by the operation of the operational amplifier can be input after being stabilized by a voltage stabilizing piece, namely, the positive voltage of the operational amplifier is input, namely, the positive voltage DC + is input into an IN terminal of a voltage stabilizing chip U6 (the specific type of the voltage stabilizing chip is MC78L05 ABPRP), and the output terminal OUT of the voltage stabilizing chip U6 transmits the stabilized voltage to the positive voltage of the operational amplifier; similarly, the negative voltage of the operational amplifier is DC-input to the IN terminal of the regulator chip U4 (particularly, the model of the regulator chip is MC78L05 ACP), and the output terminal OUT of the regulator chip U4 supplies the regulated voltage to the negative voltage terminal of the operational amplifier. The GND terminals of the above voltage stabilization chip U6 and chip U4 are grounded. Thus, the stable voltage is more beneficial to the reliable operation of the circuit. The precision is improved.
In the drawings, the positional relationship is described for illustrative purposes only and is not to be construed as limiting the present patent; it should be understood that the above-described embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not intended to limit the embodiments of the present invention. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. And are neither required nor exhaustive of all embodiments. Any modification, equivalent replacement, and improvement made within the spirit and principle of the present invention should be included in the protection scope of the claims of the present invention.
Claims (6)
1. An integrated multi-wavelength optoelectronic signal processing circuit, comprising: light source module (10): arranging more than two light sources, wherein each light source is used for emitting light with a specific wavelength; photovoltaic module (20): the light source module is used for sensing the light emitted by the light source module (10), converting the light into an electric signal and converting the electric signal into a digital signal; control module (50): for controlling the light source module (10) to select a light source which emits light of a specific wavelength, and for receiving the digital signal of the optoelectronic module (20) and processing the digital signal.
2. Integrated multi-wavelength optoelectronic signal processing circuit according to claim 1, wherein the light source module (10) comprises an LED lamp and an LED lamp driver chip; the LED lamp is electrically connected to the LED lamp driving chip, and the LED lamp driving chip is connected to the control module (50).
3. The integrated multi-wavelength optoelectronic signal processing circuit of claim 2, wherein the LED lamps are twelve, twelve corresponding to twelve wavelengths of light; the anodes of the LED lamps are connected in a positive mode, and the cathodes of the LED lamps are respectively connected to the signal output ends of the LED lamp driving chips.
4. The integrated multi-wavelength optoelectronic signal processing circuit of claim 1, wherein the optoelectronic module (20) comprises a photosensitive device (201), a current-to-voltage conversion circuit (202), and an a/D conversion circuit (204); photosensitive device (201): the light source module is used for sensing the light emitted by the light source module (10) and converting the light into a current signal; current-voltage conversion circuit (202): for converting the current signal into a voltage signal; A/D conversion circuit (204): for converting the voltage signal into a digital signal and for transmitting the digital signal to a control module (50).
5. The integrated multi-wavelength optoelectronic signal processing circuit of claim 4, wherein said photosensitive device is a photodiode.
6. The integrated multi-wavelength optoelectronic signal processing circuit of claim 4, further comprising an amplification circuit (203) for amplifying the voltage signal; the current-voltage conversion circuit (202) is electrically connected to the amplification circuit (203), and the amplification circuit (203) is electrically connected to the A/D conversion circuit (204).
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| CN201810944202.XA CN110836851A (en) | 2018-08-18 | 2018-08-18 | Integrated multi-wavelength photoelectric signal processing circuit |
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| CN201810944202.XA CN110836851A (en) | 2018-08-18 | 2018-08-18 | Integrated multi-wavelength photoelectric signal processing circuit |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114070410A (en) * | 2021-11-16 | 2022-02-18 | 华南师范大学 | Light-driven intelligent super-surface control device |
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| CN1672628A (en) * | 2005-04-29 | 2005-09-28 | 天津大学 | Dynamic spectrometry instrument with multiple wavelength LED |
| CN104764701A (en) * | 2015-04-14 | 2015-07-08 | 柴俊沙 | On-site food safety detection device |
| CN107782687A (en) * | 2017-12-04 | 2018-03-09 | 江苏博权医疗科技有限公司 | A kind of medical integrated photometer device |
| CN208872651U (en) * | 2018-08-18 | 2019-05-17 | 珠海森龙生物科技有限公司 | A kind of integrated multi-wavelength light electric signal processing circuit |
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- 2018-08-18 CN CN201810944202.XA patent/CN110836851A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1672628A (en) * | 2005-04-29 | 2005-09-28 | 天津大学 | Dynamic spectrometry instrument with multiple wavelength LED |
| CN104764701A (en) * | 2015-04-14 | 2015-07-08 | 柴俊沙 | On-site food safety detection device |
| CN107782687A (en) * | 2017-12-04 | 2018-03-09 | 江苏博权医疗科技有限公司 | A kind of medical integrated photometer device |
| CN208872651U (en) * | 2018-08-18 | 2019-05-17 | 珠海森龙生物科技有限公司 | A kind of integrated multi-wavelength light electric signal processing circuit |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN114070410A (en) * | 2021-11-16 | 2022-02-18 | 华南师范大学 | Light-driven intelligent super-surface control device |
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