CN113098479B - Voltage type photoelectric converter, device and method - Google Patents
Voltage type photoelectric converter, device and method Download PDFInfo
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- G01D5/26—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable characterised by optical transfer means, i.e. using infrared, visible, or ultraviolet light
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Abstract
The invention discloses a voltage type photoelectric converter, a device and a method, wherein the photoelectric converter comprises: the device comprises a circular base, a cylindrical metal shell, a light frequency conversion unit, a frequency voltage conversion unit, a light-transmitting sheet and a base; the photoelectric conversion device of the present invention includes: the device comprises a light frequency conversion unit, a frequency voltage conversion unit, a signal conditioning and collecting unit, a signal processing unit, a display unit and a direct current voltage stabilizing unit; the photoelectric conversion method comprises the following steps: measuring the output voltage of the frequency-voltage conversion unit under the light and no light conditions, and calculating the intensity of the light signal through the voltage; the invention can overcome the problem of dark current existing when the existing photoelectric conversion devices convert optical signals into current signals or voltage signals.
Description
Technical Field
The invention relates to photonics, in particular to a voltage type photoelectric converter, a device and a method.
Background
The photoelectric converter is a detector manufactured by utilizing the photoelectric effect of materials, and mainly converts an optical signal into an electric signal by utilizing the photoelectric effect. From the discovery of photoelectric effect, photoelectric conversion devices have been developed rapidly and have been widely used in various industries.
At present, the commonly used photoelectric effect conversion devices include photoresistors, photocells, photomultipliers, photodiodes, phototriodes and the like, and the photoelectric conversion devices are all made of semiconductor materials. The photo-detection capability depends on the intrinsic band structure properties of the material, such as the absorption coefficient, and on several characteristics of the semiconductor junction, such as doping profile, junction depth, isolation structure depth (LOCOS or STI), etc.
The photoresistor is a resistor whose resistance value varies with the intensity of incident light, which is made by using the photoconductive effect of semiconductors. The photocell is a device for directly converting light energy into electric energy and can be used as an energy device. Photomultiplier tubes are typically used to detect light signals of relatively weak intensity, and their performance is primarily determined by the photocathode, dynode and interelectrode voltage. The photodiode and the photoelectric triode utilize the reverse characteristic of the PN junction, and the reverse current of the PN junction is very weak when no light is irradiated; when the light is irradiated, the reverse current of the PN junction is rapidly increased to generate the photocurrent. The greater the intensity of the light, the greater the reverse current. The change in light causes a change in the current of the photodiode or phototransistor.
Of course, the above-mentioned several photoelectric conversion devices convert an optical signal into a current signal or a voltage signal, and have certain defects and disadvantages, such as: the photoresistor has poor photoelectric conversion linearity under strong light irradiation, long photoelectric relaxation process and low frequency response (the capacity of the device to detect optical signals with fast change). The frequency response, and particularly the high frequency response, of photovoltaic cells is poor. The photomultiplier is mainly used for detecting weak light signals, and strong light is prevented from being directly incident. Both photodiodes and phototransistors have dark current. Dark current must be measured in advance, and particularly when a photodiode is used for precision optical power measurement, dark current-induced errors must be carefully considered and corrected.
Disclosure of Invention
In view of the above disadvantages in the prior art, the present invention provides a voltage-type photoelectric converter, an apparatus and a method thereof, which solve the problem that dark current exists when the existing photoelectric conversion devices convert optical signals into current signals or voltage signals.
In order to achieve the purpose of the invention, the invention adopts the technical scheme that: a voltage-type photoelectric converter comprising: the device comprises a circular base, a cylindrical metal shell, a light frequency conversion unit, a frequency voltage conversion unit, a light-transmitting sheet and a base;
the optical frequency conversion unit is in communication connection with the frequency-voltage conversion unit; the light frequency conversion unit, the frequency voltage conversion unit and the light-transmitting sheet are fixed in the cylindrical metal shell; one end of the opening of the cylindrical metal shell is fixedly connected with the base; the circular base is fixedly connected with the base, is arranged in the cylindrical metal shell and is used for fixing the optical frequency conversion unit and the frequency-voltage conversion unit.
Further, the optical frequency conversion unit includes: a drive circuit and a piezoelectric resonant sensor; and the output end of the piezoelectric resonant sensor is connected with the input end of the driving circuit.
Furthermore, the piezoelectric resonant sensor is fixed in the cylindrical metal shell through a ribbon bracket; one end of the strip-shaped support is fixedly connected with the circular base, and the other end of the strip-shaped support is fixedly connected with the piezoelectric resonant sensor.
Furthermore, the other end of the cylindrical metal shell, which is opposite to one end of the opening, is provided with an opening; the light-transmitting sheet is fixed between the opening and the piezoelectric resonant sensor.
The beneficial effects of the above further scheme are: the circular base and the cylindrical metal shell are mainly used together with the light-transmitting sheet to encapsulate the piezoelectric resonant sensor, the driving circuit and the frequency-voltage conversion unit, so that the sealing effect is achieved, and the performance is prevented from being influenced by pollution;
the light-transmitting sheet has two main functions, namely, incident light is gathered, the focus point of the incident light is the electrode position of the piezoelectric resonant sensor, and the size of the focus point is equal to that of the electrode, so that the response sensitivity and accuracy of the piezoelectric resonant sensor are improved; and secondly, the piezoelectric resonant sensor is packaged together with the circular base and the cylindrical metal shell with the hole, so that the piezoelectric resonant sensor plays a role in sealing and prevents the photoelectric converter from being polluted to influence the performance of the photoelectric converter.
Furthermore, 4 leading-out needles are fixed on the base and are arranged outside the cylindrical metal shell;
the power supply end of the driving circuit, the grounding end of the driving circuit, the output end of the frequency-voltage conversion unit and the grounding end of the frequency-voltage conversion unit are respectively connected with the 4 extraction needles in a one-to-one correspondence mode through gold wire binding.
Further, the drive circuit includes: the circuit comprises a resistor R1, a resistor R2, a resistor R3, a grounding resistor R4, a resistor R5, a grounding resistor R6, a grounding capacitor C1, a capacitor C2, a capacitor C3, a capacitor C4, a grounding capacitor C5, a capacitor C6, a grounding capacitor C7, a grounding capacitor C8, a capacitor C9, a grounding capacitor C10, a voltage stabilizing diode D1, a crystal oscillator Y1, an inductor L2, an amplifier U1 and a triode Q1;
one end of the resistor R1 is used as the input end of the driving circuit, and the other end of the resistor R1 is respectively connected with one end of the inductor L1, the grounding capacitor C1, the cathode of the voltage stabilizing diode D1 and one end of the capacitor C4; the other end of the inductor L1 is respectively connected with one end of a capacitor C2, one end of a capacitor C3 and one end of a crystal oscillator Y1; the other end of the capacitor C4 is respectively connected with one end of the capacitor C2 and one end of the capacitor C3; the anode of the voltage stabilizing diode D1 is grounded; the base electrode of the triode Q1 is respectively connected with one end of a resistor R2, the other end of a crystal oscillator Y1 and one end of a capacitor C6, the collector electrode of the triode Q1 is connected with one end of a resistor R3, and the emitter electrode of the triode Q1 is respectively connected with one end of the capacitor C6, one end of a grounding capacitor C7, one end of a grounding resistor R4, one end of an inductor L2 and one end of a capacitor C9; the input end IN of the amplifier U1 is respectively connected with the other end of the capacitor C9, one end of the resistor R5 and the grounding resistor R6, and the VCC end of the amplifier U1 is respectively connected with the other end of the resistor R2, the other end of the resistor R3, the grounding capacitor C5, the other end of the resistor R5 and the grounding capacitor C10 and serves as a power supply end of the driving circuit; the other end of the inductor L2 is connected with a grounding capacitor C8; and the output end OUT of the amplifier U1 is used as the output end of the driving circuit.
Further, the piezoelectric resonance type sensor includes: a sensor wafer, a first sensor electrode, and a second sensor electrode; the sensor wafer is secured between the first sensor electrode and the second sensor electrode.
A voltage-type photoelectric conversion device comprising: the device comprises a light frequency conversion unit, a frequency voltage conversion unit, a signal conditioning and collecting unit, a signal processing unit, a display unit and a direct current voltage stabilizing unit;
the output end of the optical frequency conversion unit is connected with the input end of the frequency-voltage conversion unit; the output end of the frequency-voltage conversion unit is in communication connection with the input end of the signal conditioning acquisition unit; the signal processing unit is respectively in communication connection with the output end of the signal conditioning and collecting unit and the display unit; the direct current voltage stabilizing unit is electrically connected with the optical frequency conversion unit; the optical frequency conversion unit includes: a drive circuit and a piezoelectric resonant sensor; and the output end of the piezoelectric resonant sensor is connected with the input end of the driving circuit.
A voltage-type photoelectric conversion method comprising the steps of:
s1, measuring the output voltage of a frequency-voltage conversion unit when no light signal irradiates a light window of the light-frequency conversion unit to obtain no light output voltage of the frequency-voltage conversion unit;
s2, aligning and irradiating the optical signal to an optical window of the optical frequency conversion unit, and measuring the output voltage of the frequency voltage conversion unit to obtain the optical output voltage of the frequency voltage conversion unit;
s3, calculating the light signal intensity of the photoelectric converter according to the non-light output voltage and the light output voltage of the frequency-voltage conversion unit;
the formula for calculating the optical signal intensity of the photoelectric converter in step S3 is:
V 1 ＝V 0 (1+C Lf ·P)
V 0 ＝K f-V ·f 0
wherein, V 1 Having an optical output voltage, V, for the frequency-voltage conversion unit 0 A non-light output voltage for the frequency-voltage conversion unit, C Lf Is the optical-frequency conversion coefficient of the piezoelectric resonant sensor, P is the optical signal intensity, K f-V Is a frequency-voltage conversion coefficient, f 0 The frequency is output when the optical frequency conversion unit is not irradiated by the optical signal.
In conclusion, the beneficial effects of the invention are as follows:
1. the invention utilizes the light intensity-frequency conversion relation of the voltage type photoelectric conversion device to directly convert the light intensity irradiated on the surface of the voltage type photoelectric conversion device into the output frequency of the voltage type photoelectric conversion device.
2. The time frequency is one of seven basic physical quantities, can be used as a measurement standard, and is easy to accurately measure, so that the photoelectric conversion method has higher precision;
3. the invention adopts the voltage type photoelectric conversion device to carry out photoelectric conversion, and utilizes the relationship of light intensity-frequency characteristic of the sensor to represent the illumination intensity by the frequency quantity of the sensor, thereby being easier to realize high-precision measurement;
4. the photoelectric conversion method has the characteristics of quick response, wide response frequency band and the like, is matched with an integrated driving circuit, a frequency-voltage conversion unit and a light-transmitting sheet, and is easy for mass production.
5. The invention calculates the light signal intensity of the photoelectric converter by measuring the non-light output voltage and the light output voltage of the frequency-voltage conversion unit and according to the corresponding relation of the non-light output voltage and the light output voltage, thereby avoiding the generation of dark current.
Drawings
FIG. 1 is a schematic diagram of a voltage-type photoelectric converter;
FIG. 2 is a schematic structural view of the bottom of a circular base;
FIG. 3 is a circuit diagram of a driving circuit;
fig. 4 is a schematic structural diagram of a piezoelectric resonant sensor;
FIG. 5 is a block diagram of a voltage-type photoelectric conversion device;
FIG. 6 is a flow chart of a voltage-based photoelectric conversion method;
wherein, 1, a circular base; 2. a cylindrical metal housing; 3. a drive circuit; 4. a frequency-voltage conversion unit; 5. a light transmitting sheet; 6. a band-shaped stent; 7. glass glaze, 8, leading-out needles; 9. a piezoelectric resonant sensor; 10. a conductive adhesive; 11. a base; 91. a sensor wafer; 92. a first sensor electrode; 93. a second sensor electrode.
Detailed Description
The following description of the embodiments of the present invention is provided to facilitate the understanding of the present invention by those skilled in the art, but it should be understood that the present invention is not limited to the scope of the embodiments, and it will be apparent to those skilled in the art that various changes may be made without departing from the spirit and scope of the invention as defined and defined in the appended claims, and all matters produced by the invention using the inventive concept are protected.
As shown in fig. 1, a voltage-type photoelectric converter includes: the device comprises a circular base 1, a cylindrical metal shell 2, an optical frequency conversion unit, a frequency-voltage conversion unit 4, a light-transmitting sheet 5 and a base 11;
the optical frequency conversion unit is in communication connection with the frequency-voltage conversion unit 4; the optical frequency conversion unit, the frequency voltage conversion unit 4 and the light-transmitting sheet 5 are fixed in the cylindrical metal shell 2; one end of the opening of the cylindrical metal shell 2 is fixedly connected with the base 11; the circular base 1 is fixedly connected with the circular base 11, is arranged in the cylindrical metal shell 2 and is used for fixing the optical frequency conversion unit and the frequency-voltage conversion unit 4.
The optical frequency conversion unit includes: a drive circuit 3 and a piezoelectric resonant sensor 9; the output end of the piezoelectric resonant sensor 9 is connected with the input end of the driving circuit 3. The drive circuit 3 and the frequency-voltage conversion unit 4 are fixed to the circular base 1 by an insulating paste.
The piezoelectric resonant sensor 9 is fixed in the cylindrical metal shell 2 through a ribbon bracket 6; one end of the strip-shaped support 6 is fixedly connected with the circular base 1 through conductive adhesive, the other end of the strip-shaped support is fixedly connected with the piezoelectric resonant sensor 9 through conductive adhesive 10, and the strip-shaped support 6 is connected with the driving circuit 3 in a gold wire binding mode, so that the piezoelectric resonant sensor 9 is connected with the driving circuit 3.
The other end of the cylindrical metal shell 2 opposite to one end of the opening is provided with an opening; the light-transmitting sheet 5 is fixed between the opening and the piezoelectric resonant sensor 9.
4 leading-out needles 8 are fixed on the base 11, and the 4 leading-out needles 8 are arranged outside the cylindrical metal shell 2;
the power end of the driving circuit 3, the grounding end of the driving circuit 3, the output end of the frequency-voltage conversion unit 4 and the grounding end of the frequency-voltage conversion unit 4 are respectively connected with the 4 outgoing pins 8 in a one-to-one correspondence manner in a gold wire binding manner, the output end of the driving circuit 3 is connected with the input end of the frequency-voltage conversion unit 4 in a gold wire binding manner, and the grounding end of the driving circuit 3 is connected with the grounding end of the frequency-voltage conversion unit 4 in a gold wire binding manner.
As shown in fig. 2, the circular insulating base 11 has 4 leading-out pins 8 and a packaging mark, and the 4 leading-out pins 8 are uniformly distributed with the center of the base as a symmetric center and are respectively numbered from 1# to 4# in the clockwise direction. In the above description, the 1# pin out is a package mark for the base 11 and is defined as a power supply terminal of the photoelectric converter, the 2# and 4# pins out are defined as a ground terminal of the photoelectric converter, and the 3# pin out is defined as an output terminal of the photoelectric converter.
The circular base 1 is an insulator.
As shown in fig. 3, the drive circuit 3 includes: the circuit comprises a resistor R1, a resistor R2, a resistor R3, a grounding resistor R4, a resistor R5, a grounding resistor R6, a grounding capacitor C1, a capacitor C2, a capacitor C3, a capacitor C4, a grounding capacitor C5, a capacitor C6, a grounding capacitor C7, a grounding capacitor C8, a capacitor C9, a grounding capacitor C10, a voltage stabilizing diode D1, a crystal oscillator Y1, an inductor L2, an amplifier U1 and a triode Q1;
one end of the resistor R1 is used as the input end of the driving circuit 3, and the other end of the resistor R1 is respectively connected with one end of the inductor L1, the grounding capacitor C1, the cathode of the voltage stabilizing diode D1 and one end of the capacitor C4; the other end of the inductor L1 is respectively connected with one end of a capacitor C2, one end of a capacitor C3 and one end of a crystal oscillator Y1; the other end of the capacitor C4 is respectively connected with one end of the capacitor C2 and one end of the capacitor C3; the anode of the voltage stabilizing diode D1 is grounded; the base electrode of the triode Q1 is respectively connected with one end of a resistor R2, the other end of a crystal oscillator Y1 and one end of a capacitor C6, the collector electrode of the triode Q1 is connected with one end of a resistor R3, and the emitter electrode of the triode Q1 is respectively connected with one end of the capacitor C6, one end of a grounding capacitor C7, one end of a grounding resistor R4, one end of an inductor L2 and one end of a capacitor C9; an input end IN of the amplifier U1 is respectively connected with the other end of the capacitor C9, one end of the resistor R5 and the grounding resistor R6, and a VCC end of the amplifier U1 is respectively connected with the other end of the resistor R2, the other end of the resistor R3, the grounding capacitor C5, the other end of the resistor R5 and the grounding capacitor C10 and serves as a power supply end of the driving circuit 3; the other end of the inductor L2 is connected with a grounding capacitor C8; the output terminal OUT of the amplifier U1 serves as the output terminal of the driving circuit 3.
As shown in fig. 4, the piezoelectric resonance type sensor 9 includes: a sensor wafer 91, a first sensor electrode 92, and a second sensor electrode 93; the sensor wafer 91 is fixed between the first sensor electrode 92 and the second sensor electrode 93, and has a circular shape, and the sensor wafer 91 has a circular shape.
As shown in fig. 5, a voltage-type photoelectric conversion device for realizing conversion of light intensity irradiated to a surface of the voltage-type photoelectric conversion device into an output frequency of the voltage-type photoelectric conversion device, includes: the device comprises a light frequency conversion unit, a frequency voltage conversion unit 4, a signal conditioning and collecting unit, a signal processing unit, a display unit and a direct current voltage stabilizing unit;
the output end of the optical frequency conversion unit is connected with the input end of the frequency-voltage conversion unit 4; the output end of the frequency-voltage conversion unit 4 is in communication connection with the input end of the signal conditioning and collecting unit; the signal processing unit is respectively in communication connection with the output end of the signal conditioning and collecting unit and the display unit; the direct current voltage stabilizing unit is electrically connected with the optical frequency conversion unit; the optical frequency conversion unit includes: a drive circuit 3 and a piezoelectric resonant sensor 9; the output end of the piezoelectric resonant sensor 9 is connected with the input end of the driving circuit 3.
The driving circuit 3 is mainly used for driving the voltage type photoelectric conversion device, enabling the voltage type photoelectric conversion device to work normally and outputting frequency; meanwhile, the driving circuit 3 has a temperature compensation function, and can offset frequency drift of the voltage type photoelectric conversion device caused by the external environment temperature.
The piezoelectric resonant sensor 9 mainly functions to convert an optical signal irradiated to the surface thereof into a frequency signal and output the frequency signal through the drive circuit 3.
The circular base 1 and the cylindrical metal casing 2 mainly encapsulate the piezoelectric resonant sensor 9, the driving circuit 3 and the frequency-voltage conversion unit 4 together with the light-transmitting sheet 5, and have a sealing function to prevent the performance from being affected by pollution.
As shown in fig. 6, a voltage-type photoelectric conversion method includes the steps of:
s1, measuring the output voltage of a frequency-voltage conversion unit 4 when no light signal irradiates an optical window of the optical frequency conversion unit, and obtaining no light output voltage of the frequency-voltage conversion unit 4;
s2, aligning and irradiating the optical signal to an optical window of the optical frequency conversion unit, and measuring the output voltage of the frequency-voltage conversion unit 4 to obtain the optical output voltage of the frequency-voltage conversion unit 4;
s3, calculating the optical signal intensity of the photoelectric converter according to the non-optical output voltage and the optical output voltage of the frequency-voltage conversion unit 4;
the formula for calculating the optical signal intensity of the photoelectric converter in step S3 is:
V 1 ＝V 0 (1+C Lf ·P)
V 0 ＝K f-V ·f 0
wherein, V 1 Is the light output voltage, V, of the frequency-to-voltage conversion unit 4 0 A non-light output voltage of the frequency-voltage conversion unit 4, C Lf Is the optical-frequency conversion coefficient of the piezoelectric resonant sensor 9, P is the optical signal intensity, K f-V As a frequency-to-voltage conversion coefficient, f 0 The frequency is output when the optical frequency conversion unit is not irradiated by optical signals.
Claims (5)
1. A voltage-type photoelectric converter, comprising: the device comprises a circular base (1), a cylindrical metal shell (2), a light frequency conversion unit, a frequency-voltage conversion unit (4), a light-transmitting sheet (5) and a base (11);
the optical frequency conversion unit is in communication connection with the frequency-voltage conversion unit (4); the light frequency conversion unit, the frequency voltage conversion unit (4) and the light transmitting sheet (5) are fixed in the cylindrical metal shell (2); one end of the opening of the cylindrical metal shell (2) is fixedly connected with the base (11); the circular base (1) is fixedly connected with the base (11), is arranged in the cylindrical metal shell (2) and is used for fixing the optical frequency conversion unit and the frequency-voltage conversion unit (4); the frequency-voltage conversion unit (4) is used for converting the output frequency signal output by the optical frequency conversion unit into a voltage signal;
the light frequency conversion unit includes: a drive circuit (3) and a piezoelectric resonant sensor (9); the output end of the piezoelectric resonant sensor (9) is connected with the input end of the driving circuit (3);
the piezoelectric resonant sensor (9) is fixed in the cylindrical metal shell (2) through a strip-shaped bracket (6); one end of the belt-shaped support (6) is fixedly connected with the circular base (1), and the other end of the belt-shaped support is fixedly connected with the piezoelectric resonant sensor (9);
the other end of the cylindrical metal shell (2) opposite to one end of the opening is provided with an opening; the light-transmitting sheet (5) is fixed between the opening and the piezoelectric resonant sensor (9);
the drive circuit (3) comprises: the circuit comprises a resistor R1, a resistor R2, a resistor R3, a grounding resistor R4, a resistor R5, a grounding resistor R6, a grounding capacitor C1, a capacitor C2, a capacitor C3, a capacitor C4, a grounding capacitor C5, a capacitor C6, a grounding capacitor C7, a grounding capacitor C8, a capacitor C9, a grounding capacitor C10, a voltage stabilizing diode D1, a crystal oscillator Y1, an inductor L2, an amplifier U1 and a triode Q1;
one end of the resistor R1 is used as the input end of the driving circuit (3), and the other end of the resistor R1 is respectively connected with one end of the inductor L1, the grounding capacitor C1, the cathode of the voltage stabilizing diode D1 and one end of the capacitor C4; the other end of the inductor L1 is respectively connected with one end of a capacitor C2, one end of a capacitor C3 and one end of a crystal oscillator Y1; the other end of the capacitor C4 is respectively connected with one end of the capacitor C2 and one end of the capacitor C3; the anode of the voltage stabilizing diode D1 is grounded; the base electrode of the triode Q1 is respectively connected with one end of a resistor R2, the other end of a crystal oscillator Y1 and one end of a capacitor C6, the collector electrode of the triode Q1 is connected with one end of a resistor R3, and the emitter electrode of the triode Q1 is respectively connected with one end of the capacitor C6, one end of a grounding capacitor C7, one end of a grounding resistor R4, one end of an inductor L2 and one end of a capacitor C9; the input end IN of the amplifier U1 is respectively connected with the other end of the capacitor C9, one end of the resistor R5 and the grounding resistor R6, and the VCC end of the amplifier U1 is respectively connected with the other end of the resistor R2, the other end of the resistor R3, the grounding capacitor C5, the other end of the resistor R5 and the grounding capacitor C10 and serves as a power supply end of the driving circuit (3); the other end of the inductor L2 is connected with a grounding capacitor C8; and the output end OUT of the amplifier U1 is used as the output end of the driving circuit (3).
2. The voltage type photoelectric converter according to claim 1, wherein 4 leading-out pins (8) are fixed on the base (11), and the 4 leading-out pins (8) are arranged outside the cylindrical metal shell (2);
the power supply end of the driving circuit (3), the grounding end of the driving circuit (3), the output end of the frequency-voltage conversion unit (4) and the grounding end of the frequency-voltage conversion unit (4) are respectively connected with the 4 extraction needles (8) in a one-to-one correspondence mode through gold wire binding.
3. Voltage-type photoelectric converter according to claim 1, characterized in that the piezoelectric resonant sensor (9) comprises: a sensor wafer (91), a first sensor electrode (92), and a second sensor electrode (93); the sensor wafer (91) is fixed between a first sensor electrode (92) and a second sensor electrode (93).
4. An arrangement of voltage-type photoelectric converters according to claim 1, comprising: the device comprises a light frequency conversion unit, a frequency voltage conversion unit (4), a signal conditioning and collecting unit, a signal processing unit, a display unit and a direct current voltage stabilizing unit;
the output end of the optical frequency conversion unit is connected with the input end of the frequency-voltage conversion unit (4); the output end of the frequency-voltage conversion unit (4) is in communication connection with the input end of the signal conditioning and acquisition unit; the signal processing unit is respectively in communication connection with the output end of the signal conditioning and acquiring unit and the display unit; the direct current voltage stabilizing unit is electrically connected with the optical frequency conversion unit; the optical frequency conversion unit includes: a drive circuit (3) and a piezoelectric resonant sensor (9); the output end of the piezoelectric resonant sensor (9) is connected with the input end of the driving circuit (3); the frequency-voltage conversion unit (4) is used for converting the output frequency signal output by the optical frequency conversion unit into a voltage signal.
5. A voltage-type photoelectric conversion method of an apparatus to which the voltage-type photoelectric converter according to claim 4 is applied, comprising the steps of:
s1, measuring the output voltage of a frequency-voltage conversion unit (4) when no light signal irradiates the light window of the light-frequency conversion unit, and obtaining the no light output voltage of the frequency-voltage conversion unit (4);
s2, aligning and irradiating the optical signal to an optical window of the optical frequency conversion unit, and measuring the output voltage of the frequency-voltage conversion unit (4) to obtain the optical output voltage of the frequency-voltage conversion unit (4);
s3, calculating the optical signal intensity of the photoelectric converter according to the non-optical output voltage and the optical output voltage of the frequency-voltage conversion unit (4);
the formula for calculating the optical signal intensity of the photoelectric converter in step S3 is:
V 1 = V 0 ·(1+ C Lf ·P)
V 0 =K f-V ·f 0
wherein,V 1 is the light output voltage of the frequency-voltage conversion unit (4),V 0 is a lightless output voltage of the frequency-voltage conversion unit (4),C Lf is the optical-frequency conversion coefficient of the piezoelectric resonance type sensor (9),Pin order to be the intensity of the light signal,K f-V in order to be a frequency-to-voltage conversion coefficient,f 0 the frequency is output when the optical frequency conversion unit is not irradiated by optical signals.
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