CN215115110U - Laser safety detection circuit - Google Patents
Laser safety detection circuit Download PDFInfo
- Publication number
- CN215115110U CN215115110U CN202120629664.XU CN202120629664U CN215115110U CN 215115110 U CN215115110 U CN 215115110U CN 202120629664 U CN202120629664 U CN 202120629664U CN 215115110 U CN215115110 U CN 215115110U
- Authority
- CN
- China
- Prior art keywords
- pin
- electrically connected
- voltage signal
- operational amplifier
- impedance resistor
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Landscapes
- Semiconductor Lasers (AREA)
Abstract
The utility model relates to a laser instrument technical field discloses a laser instrument safety inspection circuit, include: the photoelectric sensor, the voltage comparison circuit, the inverter circuit and the signal detection circuit are electrically connected in sequence. The photoelectric sensor is used for converting signal light of the seed source into a voltage signal, the voltage comparison circuit is used for inverting the voltage signal into a first negative voltage signal, the inverter circuit is used for inverting the first negative voltage signal into a first positive voltage signal, and the signal detection circuit is used for receiving and detecting whether the inverter circuit outputs the first positive voltage signal or not to judge the working state of the seed source. Meanwhile, the laser safety detection circuit is arranged in the laser, so that the use safety of the laser can be effectively guaranteed.
Description
Technical Field
The utility model relates to a laser instrument technical field especially relates to a laser instrument safety inspection circuit.
Background
With the development of laser technology, lasers are widely used for production, application and processing, such as marking, cutting and other different processing power requirements.
MOPA (Master Oscillator Power-Amplifier) lasers typically include an Oscillator stage, which may be a seed source, and an Amplifier stage. The seed light output by the seed source is also referred to as signal light. In order to increase the output power of the laser, generally, the signal light output by the seed source needs to pass through at least one stage of amplification stage, and is excited and amplified by the active optical fiber in the amplification stage, and when the amplification proper times reach a certain power, the corresponding processing requirements can be met. In order to ensure the stability of the MOPA laser, a seed source is generally required to output signal light, and when the signal light reaches a rear amplification stage, a pump source in the amplification stage can be driven to output pump light; if the seed source is not started, no seed light is output, and the pump source in the driving amplification stage is started to output the pump light under the condition of no seed light output, so that the power peak value of the active optical fiber in the amplification stage is overlarge, the active optical fiber and the pump source are both burnt, and the laser cannot work normally. Therefore, the timing of the seed source drive and the amplifier stage pump source drive to control the laser is of great importance in the normal operation of the laser. That is, it is important to detect whether the seed source outputs seed light. However, when the seed source outputs the seed light, the corresponding voltage signal is generally a positive voltage signal and is accompanied by noise, so that the error of detecting the voltage signal is extremely large; meanwhile, for narrow pulse width low frequency voltage signals, the signals are difficult to detect by a programmable logic device (such as FPGA); therefore, the problem to be solved by providing the seed source light detection circuit in the laser is very large. Therefore, the circuit with comparison, inversion and delay functions is designed through a large amount of experiment accumulation so as to meet the requirement of accurately detecting whether the seed source outputs seed light or not.
SUMMERY OF THE UTILITY MODEL
In order to solve the technical problem, an embodiment of the utility model provides a laser instrument safety inspection circuit, it can accurately detect whether seed source exports seed light.
The embodiment of the utility model provides a solve its technical problem and adopt following technical scheme:
a laser safety detection circuit is applied to detecting the working state of a seed source and comprises:
a photoelectric sensor for converting the optical signal output by the seed source into a voltage signal;
the input end of the voltage comparison circuit is electrically connected with the photoelectric sensor and is used for receiving the voltage signal output by the photoelectric sensor and inverting the voltage signal into a first negative voltage signal;
the inverting circuit is electrically connected with the output end of the voltage comparison circuit and used for receiving the first negative voltage signal output by the voltage comparison circuit and inverting the first negative voltage signal into a first positive voltage signal;
and the signal detection circuit is electrically connected with the output end of the phase inverting circuit and is used for receiving and detecting whether the phase inverting circuit outputs a first positive voltage signal or not so as to judge the working state of the seed source.
Further, the voltage comparison circuit includes: the first operational amplifier is provided with a 1 st pin electrically connected with an electric signal output end of the first operational amplifier, a 2 nd pin electrically connected with a voltage negative electrode of the first operational amplifier, a 3 rd pin electrically connected with a same-phase end of the first operational amplifier, a 4 th pin electrically connected with an inverting end of the first operational amplifier, and a 6 th pin electrically connected with a voltage positive electrode of the first operational amplifier;
the 2 nd pin and the 6 th pin are respectively and electrically connected with the negative electrode and the positive electrode of the power supply;
the 3 rd pin is grounded;
the 4 th pin is respectively and electrically connected with the inverting terminal of the first operational amplifier and the photoelectric sensor and is used for inputting a voltage signal to the first operational amplifier so as to invert the input voltage signal into a first negative voltage signal;
the 1 st pin is electrically connected with the inverter circuit so as to realize that the first negative voltage signal is input into the inverter circuit.
Further, the voltage comparison circuit includes: the capacitor C1, the inductor L1, the capacitor C2, the inductor L2 and the impedance resistor R5 are used for filtering high-frequency interference electric signals; wherein the content of the first and second substances,
the connection point of the input end of the No. 2 pin is respectively and electrically connected with the output end of the capacitor C1 and the output end of the inductor L1, the input end of the capacitor C1 is grounded, and the input end of the inductor L1 is electrically connected with the negative pole of the power supply;
the connection point of the input end of the 6 th pin is electrically connected with the output end of the capacitor C2 and the output end of the inductor L2 respectively, and the input end of the capacitor C2 is grounded;
the first operational amplifier is provided with a 5 th pin electrically connected with a DIS end of the first operational amplifier;
the 5 th pin input end is electrically connected with the output end of the impedance resistor R5, the impedance resistor R5 is connected with the inductor L2 in parallel, and the impedance resistor R5 is electrically connected with the positive electrode of the power supply through the connecting point after the impedance resistor R5 is connected with the inductor L2 in parallel.
Further, the voltage comparison circuit includes: the resistance resistors R1, R3 and R4 are used for reducing the noise of the input voltage signal and improving the stability of the voltage signal; wherein the content of the first and second substances,
the 3 rd pin is grounded through a series resistance R3;
the connection point of the input end of the 4 th pin is respectively and electrically connected with the output end of an impedance resistor R1 and an impedance resistor R4, the input end of the impedance resistor R1 is electrically connected with the photoelectric sensor, and the input end of the impedance resistor R4 is grounded.
Further, the inverter circuit includes: the second operational amplifier is provided with a 7 th pin electrically connected with an electric signal output end of the second operational amplifier, an 8 th pin electrically connected with a voltage negative electrode of the second operational amplifier, a 9 th pin electrically connected with a same-phase end of the second operational amplifier, a 10 th pin electrically connected with an inverted-phase end of the second operational amplifier and a 12 th pin electrically connected with a voltage positive electrode of the second operational amplifier;
the 8 th pin is grounded so as to input zero voltage;
the 12 th pin is electrically connected with the 6 th pin connecting point so as to input positive voltage;
the 9 th pin is grounded;
the 10 th pin is electrically connected with the 1 st pin and is used for inputting a first negative voltage signal to the second operational amplifier so as to invert the input first negative voltage signal into a first positive voltage signal and output the first positive voltage signal from the 7 th pin;
and the 7 th pin is electrically connected with the signal detection circuit so as to realize that a first positive voltage signal is input into the signal detection circuit.
Further, the inverter circuit includes: an integrating delay circuit, comprising: a capacitor C3, a resistance resistor R6 and a resistance resistor R7 for delaying the output of the first positive voltage signal; wherein the content of the first and second substances,
the 7 th pin output end connection point is respectively and electrically connected with the signal detection circuit input end, and a capacitor C3 and an impedance resistor R6 which are mutually connected in parallel;
the 10 th pin input end connection point is respectively and electrically connected with the 1 st pin and the output end of the impedance resistor R7, and the input end of the impedance resistor R7 is grounded.
Further, the inverter circuit includes: the impedance resistor R8, the variable resistor R9, the impedance resistor R10 and the second operational amplifier are provided with an 11 th pin which is electrically connected with the DIS terminal of the second operational amplifier;
the input end connection point of the 9 th pin is respectively and electrically connected with the output ends of the variable resistor R9 and the impedance resistor R10, the input end of the impedance resistor R10 is grounded, so that the voltage value input by the positive phase end of the second operational amplifier is adjusted, and the comparison threshold value of the second operational amplifier is adjusted;
the input end of the 11 th pin is electrically connected with the output end of the resistance resistor R8, and the input end of the variable resistor R9 and the input end of the resistance resistor R8 are electrically connected with the connection point of the 6 th pin through a connection point.
Further, the voltage comparison circuit includes: an impedance resistor R2, the 1 st pin electrically connected to the 10 th pin through a series impedance resistor R2.
Further, the inverter circuit includes: an impedance resistor R11 and an impedance resistor R12, the signal detection circuit comprises a programmable logic device for receiving and detecting the first positive voltage signal to determine the working state of the seed source.
The 7 th pin output end connection point is respectively and electrically connected with the input end of the impedance resistor R11, the capacitor C3 and the impedance resistor R6 which are mutually connected in parallel, the connection point of the output end of the impedance resistor R11 is respectively and electrically connected with the input end of the impedance resistor R12 and the programmable logic device, and the output end of the impedance resistor R12 is grounded.
Compared with the prior art, the utility model discloses a laser instrument safety detection circuit, be applied to and detect kind of seed source operating condition, including the photoelectric sensor who connects in proper order the electricity, voltage comparison circuit, inverter circuit and signal detection circuit, wherein, photoelectric sensor changes kind of seed source's signal light into voltage signal, and this voltage signal is first negative voltage signal through voltage comparison circuit reversal, and this first negative voltage signal is first positive voltage signal through inverter circuit reversal, and whether first positive voltage signal is exported through signal detection circuit receipt and detection inverter circuit at last to judge kind of seed source's operating condition. If the seed source is in a working state, the inverter circuit outputs a first positive voltage signal, and the signal detection circuit receives and detects the first positive voltage signal; if the seed source is in a non-working state, the inverting circuit cannot output the first positive voltage signal, and the signal detection circuit cannot receive and detect the first positive voltage signal. Compared with the prior art, the existing laser is not provided with the laser safety detection circuit, and the existence of the laser safety detection circuit avoids the possibility that the pump light of the amplification stage still outputs the pump light to burn the active optical fiber of the amplification stage due to the fact that the laser cannot accurately detect whether the seed source outputs the seed light. The utility model discloses a voltage comparison circuit and inverter circuit still are provided with corresponding impedance resistance and electric capacity, have improved the stability that this laser instrument safety detection circuit fortune was put in the course of the work, have avoided the auto excitation squeaking that produces noise and noise production. In addition, a delay circuit is arranged in the phase-reversing circuit, so that the output time of the first positive voltage signal can be prolonged, the situation that the first positive voltage signal cannot be detected by the signal detection circuit due to too short output time of the first positive voltage signal is avoided, and the detection accuracy of the signal detection circuit is improved.
Drawings
One or more embodiments are illustrated by way of example in the accompanying drawings, which correspond to the figures in which like reference numerals refer to similar elements and which are not to scale unless otherwise specified.
Fig. 1 is a block diagram of a laser safety detection circuit according to an embodiment of the present invention;
fig. 2 is a schematic diagram of the voltage comparison circuit and the inverter circuit shown in fig. 1.
Detailed Description
In order to facilitate understanding of the present invention, the present invention will be described in more detail with reference to the accompanying drawings and specific embodiments. It will be understood that when an element is referred to as being "on" another element, it can be directly on the other element or intervening elements may be present. When an element is referred to as being "electrically connected" to another element, it can be directly connected to the other element or intervening elements may be present. Furthermore, the terms "first," "second," "third," and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used in the description of the invention herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.
Furthermore, the technical features mentioned in the different embodiments of the invention described below can be combined with each other as long as they do not conflict with each other.
In an embodiment of the present invention, referring to fig. 1, the laser safety detection circuit includes a photoelectric sensor 100, a voltage comparison circuit 200, an inverter circuit 300 and a signal detection circuit 400 electrically connected in sequence. The photosensor 100 is used for receiving the optical signal output by the seed source and converting the optical signal into a voltage signal. In the art, the optical signal is converted into a voltage signal by the photosensor 100, and the voltage signal is a high level positive voltage signal. Subsequently, the voltage signal is input to the voltage comparison circuit 200, the voltage comparison circuit 200 inverts the voltage signal into a first negative voltage signal through its internal circuit, the first negative voltage signal is input to the inverter circuit 300, the first negative voltage signal is inverted into a first positive voltage signal through the inverter circuit 300, and finally the first positive voltage signal is input to the signal detection circuit 400, the signal detection circuit 400 is used for detecting whether the inverter circuit 300 outputs the first positive voltage signal to determine whether the seed source operates. Specifically, if the signal detection circuit 400 does not detect the first positive voltage signal, the seed source does not output seed light, i.e., the seed source is in an inoperative state; if the signal detection circuit 400 detects a first positive voltage signal, the seed source outputs seed light, i.e., the seed source is in a working state.
In an embodiment of the present invention, please refer to fig. 2 for a detailed schematic diagram of the voltage comparison circuit and the inverter circuit. The voltage comparison circuit includes: a power supply (not shown) and a first operational amplifier U4, wherein the first operational amplifier U4 is provided with a 1 st pin electrically connected with an electrical signal output end thereof, a 2 nd pin electrically connected with a voltage negative electrode thereof, a 3 rd pin electrically connected with a non-inverting end thereof, a 4 th pin electrically connected with an inverting end thereof and a 6 th pin electrically connected with a voltage positive electrode thereof; the 6 th pin and the 2 nd pin are respectively electrically connected with the anode and the cathode of a power supply. The power supply may be a power supply provided in the voltage comparison circuit 200, or an external power supply may be connected to supply voltage to the first operational amplifier U4. The non-inverting end of the first operational amplifier U4 is grounded through a pin 3, and the non-inverting end is zero voltage; the inverting terminal of the first operational amplifier U4 is electrically connected to the photosensor 100 through the 4 th pin, i.e., the voltage signal transmitted by the photosensor 100 is input from the inverting terminal of the first operational amplifier U4 through the 4 th pin. Therefore, the inverting input voltage of the first operational amplifier U4 of the present embodiment is greater than the non-inverting input voltage, and the voltage signal output from the output terminal of the first operational amplifier U4 is inverted to a first negative voltage signal.
Referring to fig. 2, in an embodiment of the present invention, the inverter circuit 300 includes: the second operational amplifier U2 is provided with a 7 th pin electrically connected with an electric signal output end of the second operational amplifier U2, an 8 th pin electrically connected with a voltage negative electrode of the second operational amplifier U2, a 9 th pin electrically connected with a same-phase end of the second operational amplifier U2, a 10 th pin electrically connected with an inverted end of the second operational amplifier U2 and a 12 th pin electrically connected with a voltage positive electrode of the second operational amplifier U2; the 8 th pin is grounded so as to input zero voltage; the 12 th pin is electrically connected with the 6 th pin connecting point so as to input positive voltage; the 9 th pin is grounded; the 10 pin is electrically connected with the 1 st pin and is used for inputting a first negative voltage signal to the second operational amplifier U2 so as to realize the inversion of the input first negative voltage signal into a first positive voltage signal and output the first positive voltage signal from the 7 th pin; the 7 th pin is electrically connected to the input terminal of the signal detection circuit 400, so as to realize that a first positive voltage signal is input into the signal detection circuit 400.
Further, with continued reference to fig. 2, the first operational amplifier U4 may further include a disable switch (DIS), where the DIS terminal is electrically connected to pin 5.
Further, with continued reference to fig. 2, the voltage comparison circuit 200 further includes: the capacitor C1, the inductor L1, the capacitor C2, the inductor L2 and the impedance resistor R5 are used for filtering high-frequency interference electric signals; the connection point of the input end of the No. 2 pin is respectively and electrically connected with the output end of the capacitor C1 and the output end of the inductor L1, the input end of the capacitor C1 is grounded, and the input end of the inductor L1 is electrically connected with the negative pole of the power supply; the connection point of the input end of the 6 th pin is electrically connected with the output end of the capacitor C2 and the output end of the inductor L2 respectively, and the input end of the capacitor C2 is grounded; the 5 th pin input end is electrically connected with the output end of an impedance resistor R5, the impedance resistor R5 is connected with the inductor L2 in parallel, and the impedance resistor R5 is electrically connected with the positive electrode of the power supply through the connecting point after the impedance resistor R5 is connected with the inductor L2 in parallel.
Further, with continued reference to fig. 2, the comparison voltage circuit 200 may further include: the resistance resistors R1, R3 and R4 are used for reducing the noise of the input voltage signal and improving the stability of the voltage signal; wherein the 3 rd pin is grounded through a series resistance R3; the connection point of the input end of the 4 th pin is respectively and electrically connected with the output ends of an impedance resistor R1 and an impedance resistor R4, the input end of the impedance resistor R1 is electrically connected with the photoelectric sensor, and the input end of the impedance resistor R4 is grounded so as to prevent the attenuation of the voltage signal.
Further, with continuing reference to fig. 2, the inverter circuit 300 according to the embodiment of the present invention may further include: an integrating delay circuit comprising: a capacitor C3, a resistance resistor R6 and a resistance resistor R7 for delaying the output of the first positive voltage signal; the 7 th pin output end connection point is respectively and electrically connected with the signal detection circuit input end, and a capacitor C3 and an impedance resistor R6 which are mutually connected in parallel; the 10 th pin input end connection point is respectively and electrically connected with the 1 st pin and the output end of the impedance resistor R7, and the input end of the impedance resistor R7 is grounded.
Further, with continued reference to fig. 2, the inverter circuit 300 may further include: the impedance resistor R8, the variable resistor R9, the impedance resistor R10 and the second operational amplifier U2 are provided with an 11 th pin electrically connected with a DIS end of the second operational amplifier U2; the input end connection point of the 9 th pin is respectively and electrically connected with the output ends of the variable resistor R9 and the impedance resistor R10, the input end of the impedance resistor R10 is grounded, so that the voltage value input by the positive phase end of the second operational amplifier is adjusted, and the comparison threshold value of the second operational amplifier is adjusted; the input end of the 11 th pin is electrically connected with the output end of the resistance resistor R8, and the input end of the variable resistor R9 and the input end of the resistance resistor R8 are electrically connected with the connection point of the 6 th pin through a connection point.
Further, with continued reference to fig. 2, the voltage comparison circuit 200 may further include: an impedance resistor R2, the 1 st pin electrically connected to the 10 th pin through a series impedance resistor R2.
Further, with continued reference to fig. 2, the inverse circuit 300 includes: an impedance resistor R11 and an impedance resistor R12, the signal detection circuit 400 includes a programmable logic device for receiving and detecting a first positive voltage signal to determine the operating state of the seed source.
The 7 th pin output end connection point is respectively and electrically connected with the input end of the impedance resistor R11, the capacitor C3 and the impedance resistor R6 which are mutually connected in parallel, the connection point of the output end of the impedance resistor R11 is respectively and electrically connected with the input end of the impedance resistor R12 and the programmable logic device, and the output end of the impedance resistor R12 is grounded. The embodiment of the utility model provides an in programmable logic device includes: FPGA or CPLD.
It can be understood that the utility model provides a laser safety detection circuit is applied to and detects seed source operating condition, including photoelectric sensor 100, voltage comparison circuit 200, inverter circuit 300 and the signal detection circuit 400 that connect electrically in proper order. The photo sensor converts the optical signal of the seed source into a voltage signal, the voltage signal enters the voltage comparison circuit, is inverted into a first negative voltage signal through the voltage comparison circuit 200, the first negative voltage signal is inverted into a first positive voltage signal through the inverter circuit 300, and finally, the signal detection circuit 400 receives and detects whether the inverter circuit 300 outputs the first positive voltage signal or not so as to judge the working state of the seed source. Compared with the prior art, the existing laser is not provided with the laser safety detection circuit, and the existence of the laser safety detection circuit avoids the possibility that the pump light of the amplification stage still outputs the pump light to burn the active optical fiber of the amplification stage due to the fact that the laser cannot accurately detect whether the seed source outputs the seed light. The voltage comparison circuit 200 and the inverter circuit 300 are also provided with corresponding impedance resistors and capacitors, so that the stability of a voltage signal of the voltage comparison circuit 200 in the working process is improved, and noise and self-excited howling caused by the noise are avoided; in addition, the inverter circuit 300 further comprises an integration delay circuit for delaying the output of the first positive voltage signal, so that the situation that the voltage signal cannot be detected by the signal detection circuit 300 due to the fact that the time length of the voltage signal is too small is avoided, and the accuracy of the laser safety detection circuit is improved.
Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit it; within the idea of the invention, also technical features in the above embodiments or in different embodiments can be combined, steps can be implemented in any order, and there are many other variations of the different aspects of the invention as described above, which are not provided in detail for the sake of brevity; although the present invention has been described in detail with reference to the foregoing embodiments, it should be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; such modifications and substitutions do not depart from the spirit and scope of the present invention.
Claims (10)
1. The utility model provides a laser instrument safety detection circuit, is applied to and detects seed source operating condition which characterized in that includes:
a photoelectric sensor for converting the optical signal output by the seed source into a voltage signal;
the input end of the voltage comparison circuit is electrically connected with the photoelectric sensor and is used for receiving the voltage signal output by the photoelectric sensor and inverting the voltage signal into a first negative voltage signal;
the inverting circuit is electrically connected with the output end of the voltage comparison circuit and used for receiving the first negative voltage signal output by the voltage comparison circuit and inverting the first negative voltage signal into a first positive voltage signal;
and the signal detection circuit is electrically connected with the output end of the phase-inverting circuit and is used for receiving and detecting whether the phase-inverting circuit outputs a first positive voltage signal or not so as to judge the working state of the seed source.
2. The laser safety detection circuit of claim 1, wherein the voltage comparison circuit comprises: the first operational amplifier is provided with a 1 st pin electrically connected with an electric signal output end of the first operational amplifier, a 2 nd pin electrically connected with a voltage negative electrode of the first operational amplifier, a 3 rd pin electrically connected with a same-phase end of the first operational amplifier, a 4 th pin electrically connected with an inverting end of the first operational amplifier, and a 6 th pin electrically connected with a voltage positive electrode of the first operational amplifier;
the 2 nd pin and the 6 th pin are respectively and electrically connected with the negative electrode and the positive electrode of the power supply;
the 3 rd pin is correspondingly grounded;
the 4 th pin is respectively and electrically connected with the inverting terminal of the first operational amplifier and the photoelectric sensor and is used for inputting a voltage signal to the first operational amplifier so as to invert the input voltage signal into a first negative voltage signal;
the 1 st pin is electrically connected with the inverter circuit so as to realize that the first negative voltage signal is input into the inverter circuit.
3. The laser safety detection circuit of claim 2, wherein the voltage comparison circuit comprises: the capacitor C1, the inductor L1, the capacitor C2, the inductor L2 and the impedance resistor R5 are used for filtering high-frequency interference electric signals; wherein the content of the first and second substances,
the connection point of the input end of the No. 2 pin is respectively and electrically connected with the output end of the capacitor C1 and the output end of the inductor L1, the input end of the capacitor C1 is grounded, and the input end of the inductor L1 is electrically connected with the negative pole of the power supply;
the connection point of the input end of the 6 th pin is electrically connected with the output end of the capacitor C2 and the output end of the inductor L2 respectively, and the input end of the capacitor C2 is grounded;
the first operational amplifier is provided with a 5 th pin electrically connected with a DIS end of the first operational amplifier;
the 5 th pin input end is electrically connected with the output end of the impedance resistor R5, the impedance resistor R5 is connected with the inductor L2 in parallel, and the impedance resistor R5 is electrically connected with the positive electrode of the power supply through the connecting point after the impedance resistor R5 is connected with the inductor L2 in parallel.
4. The laser safety detection circuit of claim 3, wherein the voltage comparison circuit comprises: the resistance resistors R1, R3 and R4 are used for reducing the noise of the input voltage signal and improving the stability of the voltage signal; wherein the content of the first and second substances,
the 3 rd pin is grounded through a series resistance R3;
the connection point of the input end of the 4 th pin is respectively and electrically connected with the output ends of an impedance resistor R1 and an impedance resistor R4, the input end of the impedance resistor R1 is electrically connected with the photoelectric sensor, and the input end of the impedance resistor R4 is grounded.
5. The laser safety detection circuit of claim 2, wherein the inverting circuit comprises: the second operational amplifier is provided with a 7 th pin electrically connected with an electric signal output end of the second operational amplifier, an 8 th pin electrically connected with a voltage negative electrode of the second operational amplifier, a 9 th pin electrically connected with a same-phase end of the second operational amplifier, a 10 th pin electrically connected with an inverted-phase end of the second operational amplifier and a 12 th pin electrically connected with a voltage positive electrode of the second operational amplifier;
the 8 th pin is grounded so as to input zero voltage;
the 12 th pin is electrically connected with the 6 th pin connecting point so as to input positive voltage;
the 9 th pin is grounded;
the 10 pin is electrically connected with the 1 st pin and used for inputting a first negative voltage signal to the second operational amplifier so as to invert the input first negative voltage signal into a first positive voltage signal and output the first positive voltage signal from the 7 th pin;
and the 7 th pin is electrically connected with the signal detection circuit so as to realize that a first positive voltage signal is input into the signal detection circuit.
6. The laser safety detection circuit of claim 5, wherein the inverting circuit comprises: an integrating delay circuit comprising: a capacitor C3, a resistance resistor R6 and a resistance resistor R7 for delaying the output of the first positive voltage signal; wherein the content of the first and second substances,
the 7 th pin output end connection point is respectively and electrically connected with the signal detection circuit input end, and a capacitor C3 and an impedance resistor R6 which are mutually connected in parallel;
the 10 th pin input end connection point is respectively and electrically connected with the 1 st pin and the output end of the impedance resistor R7, and the input end of the impedance resistor R7 is grounded.
7. The laser safety detection circuit of claim 5, wherein the inverting circuit comprises: the impedance resistor R8, the variable resistor R9, the impedance resistor R10 and the second operational amplifier are provided with an 11 th pin electrically connected with a DIS terminal of the second operational amplifier;
the input end connection point of the 9 th pin is respectively and electrically connected with the output ends of the variable resistor R9 and the impedance resistor R10, the input end of the impedance resistor R10 is grounded, so that the voltage value input by the positive phase end of the second operational amplifier is adjusted, and the comparison threshold value of the second operational amplifier is adjusted;
the input end of the 11 th pin is electrically connected with the output end of the resistance resistor R8, and the input end of the variable resistor R9 and the input end of the resistance resistor R8 are electrically connected with the connection point of the 6 th pin through a connection point.
8. The laser safety detection circuit of claim 6, wherein the voltage comparison circuit comprises: an impedance resistor R2, the 1 st pin electrically connected to the 10 th pin through a series impedance resistor R2.
9. The laser safety detection circuit of claim 8, wherein the inverting circuit comprises: an impedance resistor R11 and an impedance resistor R12, the signal detection circuit comprises a programmable logic device for receiving and detecting the first positive voltage signal to determine the working state of the seed source.
10. The laser safety detection circuit as claimed in claim 9, wherein the 7 th pin output terminal connection point is electrically connected to the input terminal of the impedance resistor R11 and the capacitor C3 and the impedance resistor R6 connected in parallel with each other, the connection point of the output terminal of the impedance resistor R11 is electrically connected to the input terminal of the impedance resistor R12 and the programmable logic device, and the output terminal of the impedance resistor R12 is grounded.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120629664.XU CN215115110U (en) | 2021-03-29 | 2021-03-29 | Laser safety detection circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120629664.XU CN215115110U (en) | 2021-03-29 | 2021-03-29 | Laser safety detection circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN215115110U true CN215115110U (en) | 2021-12-10 |
Family
ID=79345475
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202120629664.XU Active CN215115110U (en) | 2021-03-29 | 2021-03-29 | Laser safety detection circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN215115110U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116973082A (en) * | 2023-08-01 | 2023-10-31 | 中国人民解放军国防科技大学 | Laser device mode measurement system and method |
-
2021
- 2021-03-29 CN CN202120629664.XU patent/CN215115110U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116973082A (en) * | 2023-08-01 | 2023-10-31 | 中国人民解放军国防科技大学 | Laser device mode measurement system and method |
| CN116973082B (en) * | 2023-08-01 | 2024-05-31 | 中国人民解放军国防科技大学 | Laser device mode measurement system and method |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN215115110U (en) | Laser safety detection circuit | |
| JP4046820B2 (en) | Optical electric cell with a stabilizing amplifier | |
| WO2016060206A1 (en) | Optical receiver, active optical cable, and control method for optical receiver | |
| CN104567954B (en) | Micro-power broadband photoelectric detector | |
| CN106658295A (en) | Loudspeaker direct voltage detection circuit | |
| CN108173539A (en) | The method and circuit that a kind of chip wakes up | |
| CN206533521U (en) | A kind of loudspeaker DC voltage detects circuit | |
| US20110116203A1 (en) | Apparatus and method for draining stored power | |
| CN109257247B (en) | Communication module's quality detection system | |
| CN104270102A (en) | Low-distortion amplifier circuit | |
| CN112969111B (en) | OAM demodulation circuit for optical module and optical module | |
| CN211086428U (en) | Network cable detection circuit | |
| CN202836756U (en) | Optical detecting and amplifying circuit | |
| CN216051932U (en) | Frequency detection circuit | |
| CN205103337U (en) | Opto -coupler test circuit board | |
| CN114637717A (en) | Detection circuit and differential receiver | |
| CN216599684U (en) | Processing circuit of Internet of things platform | |
| CN213426112U (en) | Photoelectric conversion circuit and erbium-doped optical fiber amplifier thereof | |
| CN213986798U (en) | Transformer transformation ratio group tester with complete functions | |
| CN220188542U (en) | Sensor detection circuit and maglev train | |
| CN212748734U (en) | Water dissolved oxygen detection circuit based on time domain-to-frequency domain | |
| CN218732387U (en) | Infrared laser with protection circuit | |
| CN215727571U (en) | Engine oil filter core filtering performance detection device | |
| CN220823082U (en) | Optical signal receiving and processing module | |
| CN212111569U (en) | Inductive current detection circuit for switching power supply |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |