CN219657867U - Laser signal receiver - Google Patents
Laser signal receiver Download PDFInfo
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- CN219657867U CN219657867U CN202321243657.1U CN202321243657U CN219657867U CN 219657867 U CN219657867 U CN 219657867U CN 202321243657 U CN202321243657 U CN 202321243657U CN 219657867 U CN219657867 U CN 219657867U
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- 238000001228 spectrum Methods 0.000 description 4
- 238000004458 analytical method Methods 0.000 description 3
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Abstract
The utility model discloses a laser signal receiver, which belongs to the technical field of photoelectric sensing, and comprises the following specific technical scheme: the light signal output end of the transmitting end is connected with the light signal input end of the light-sensitive receiving and signal amplifying module, the electric signal output end of the light-sensitive receiving and signal amplifying module is connected with the electric signal input end of the signal processing module, the output end of the signal processing module is connected with the input end of the signal output module, the first power module supplies power for the light-sensitive receiving and signal amplifying module and the second power module supplies power for the signal processing module, the light signal sent by the transmitting end is input into the light-sensitive receiving and signal amplifying module, the electric signal processed by the light-sensitive receiving and signal amplifying module is input into the signal processing module for processing, the signal processed by the signal processing module is finally output through the signal output module, the processing of the received weak signal is accurately completed, the anti-interference capability is improved, and misoperation under a long distance is reduced.
Description
Technical Field
The utility model belongs to the technical field of photoelectric sensing, and particularly relates to a laser signal receiver.
Background
The correlation laser type photoelectric sensor is a photoelectric sensor using a laser beam as a detection light source, which realizes detection of a target object by measuring a change in distance between the laser beam and the target object. The correlation laser type photoelectric sensor generally comprises a transmitting end and a receiving end, wherein the transmitting end transmits laser beams, the receiving end receives laser signals transmitted back by the transmitting end, when an object shields a light path, the receiving end outputs change so as to achieve the function of detecting the object, meanwhile, the use environments are different, and the correlation laser type photoelectric sensor has various signal interferences, so that the receiving end is required to eliminate interference signals, identify effective signals and work correctly and effectively.
The laser type photoelectric sensor has the advantages of high precision, high speed, long service life, strong anti-interference capability and the like, and is widely applied to the fields of automatic production lines, robots, measuring instruments, security monitoring and the like, and common application scenes comprise object distance measurement, object position detection, object identification, workpiece positioning and the like.
At present, the domestic and foreign photoelectric sensors are difficult to meet the use requirements of most laser light sources, the price of the domestic and foreign photoelectric sensors is different due to factors such as brands, models, functions, performances, quantity and the like, the photoelectric sensors with stable performances are higher in price, the photoelectric sensors with lower prices are unstable in performances, the laser light sources cannot be in a working state for a long time, and the practical use requirements are difficult to meet, so that a laser signal receiver with low price and stable performances is needed.
Disclosure of Invention
In order to solve the technical problems in the prior art, the utility model provides the laser signal receiver which is high in anti-interference capability, low in cost and safe to use.
In order to achieve the above purpose, the technical scheme adopted by the utility model is as follows: the laser signal receiver comprises a transmitting end, wherein an optical signal output end of the transmitting end is connected with an optical signal input end of a photosensitive receiving and signal amplifying module through an optical signal, an electrical signal output end of the photosensitive receiving and signal amplifying module is connected with an electrical signal input end of a signal processing module, an output end of the signal processing module is connected with an input end of the signal output module, a first power module supplies power for the photosensitive receiving and signal amplifying module and a second power module, and the second power module supplies power for the signal processing module.
The photosensitive receiving and signal amplifying module comprises a receiving circuit, a signal output port of the receiving circuit is connected with a non-inverting input end of an integrated operational amplifier, a inverting input end of the integrated operational amplifier is connected with one end of a resistor R7, the other end of the resistor R7 is grounded, an output end of the integrated operational amplifier is respectively connected with one end of a resistor R6 and one end of a resistor R8, the other end of the resistor R6 is connected with the resistor R7, the other end of the resistor R8 is connected with one end of a capacitor C10, and the other end of the capacitor C10 is grounded;
the signal processing module comprises a controller, a No. 1 pin and a No. 5 pin of the controller are both connected with VCC3.3V, a No. 11 pin of the controller is a data output port, a No. 15 pin of the controller is connected with an electric signal output end of the photosensitive receiving and signal amplifying module, a No. 16 pin of the controller is grounded, and a No. 24 pin of the controller is connected with the clock circuit;
the signal output module comprises a triode Q3, the base electrode of the triode Q3 is connected with an 11 # pin of the controller through a resistor R10, the collector electrode of the triode Q3 is connected with VCC24V through a resistor R11, the collector electrode of the triode Q3 is connected with the base electrode of the triode Q4 through a resistor R12, the emitter electrode of the triode Q4 is connected with VCC24V, the collector electrode of the triode Q4 is connected with the anode of a photodiode D2 through a resistor R13, and the cathode of the photodiode D2 is grounded.
The first power module comprises a diode D1, the positive electrode of the diode D1 is connected with VCC24V, the negative electrode of the diode D1 is connected with the collector electrode of a triode Q1, the emitter electrode of the triode is connected with VCC5V, the base electrode of the triode Q1 is connected with the negative electrode of the diode D1 through a resistor R1, the base electrode of the triode Q1 is connected with the negative electrode of the diode ZD1, the positive electrode of the diode ZD1 is grounded, the emitter electrode of the triode Q1 is connected with one end of a capacitor C1, and the other end of the capacitor C1 is grounded.
The second power module comprises a power management chip, the No. 1 pin and the No. 3 pin of the power management chip are connected with VCC5V, the No. 2 pin of the power management chip is grounded, the No. 1 pin of the power management chip is connected with one end of a capacitor C2, the other end of the capacitor C2 is connected with the No. 2 pin, the No. 4 pin of the power management chip is connected with one end of a capacitor C3, the other end of the capacitor C3 is grounded, and the No. 5 pin of the power management chip is connected with VCC3.3V.
Compared with the prior art, the utility model has the following specific beneficial effects: according to the utility model, the small-package STM32 singlechip is selected to obtain the frequency spectrum signal by adopting the frequency spectrum recognition algorithm, so that the received weak signal is processed more accurately, the anti-interference capability is greatly improved, the error work under a long distance is greatly reduced, the effective use distance of the opposite-type laser photoelectric sensor is prolonged, the opposite-type laser photoelectric sensor can realize 0-50 m, the requirements of most like products in the market are met, the cost is greatly reduced, and the use is safer.
Drawings
Fig. 1 is an overall block diagram of the present utility model.
Fig. 2 is a circuit diagram of the photosensitive receiving and signal amplifying module in fig. 1.
Fig. 3 is a circuit diagram of the signal processing module in fig. 1.
Fig. 4 is a circuit diagram of the signal output module in fig. 1.
Fig. 5 is a circuit diagram of the first power module.
Fig. 6 is a circuit diagram of a second power module.
Detailed Description
In order to make the technical problems, technical schemes and beneficial effects to be solved more clear, the utility model is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the utility model.
As shown in fig. 1, a laser signal receiver includes a transmitting end, an optical signal output end of the transmitting end is connected with an optical signal input end of a photosensitive receiving and signal amplifying module through an optical signal, an electrical signal output end of the photosensitive receiving and signal amplifying module is connected with an electrical signal input end of a signal processing module, an output end of the signal processing module is connected with an input end of the signal output module, a first power module converts DC24V into DC5V, the DC5V is used for supplying power to the photosensitive receiving and signal amplifying module and a second power module, the second power module converts DC5V into dc3.3v, and the dc3.3v is used for supplying power to the signal processing module.
The optical signal sent by the transmitting end is input into the photosensitive receiving and signal amplifying module, the electrical signal processed by the photosensitive receiving and signal amplifying module is input into the signal processing module for processing, and the signal processed by the signal processing module is finally output through the signal output module, so that the processing of the received weak signal is accurately completed, the anti-interference capability is improved, and the misoperation under a long distance is reduced.
As shown in FIG. 2, the photosensitive receiving and signal amplifying module comprises a receiving circuit, the photosensitive receiving circuit is composed of U2, R2 and C5, a signal output port of the receiving circuit is connected with a base electrode of an input triode Q2 of the first-stage amplifying circuit, an output of the first-stage amplifying circuit is connected with a non-inverting input end of an integrated operational amplifier of the second-stage amplifying circuit, a reverse input end of the integrated operational amplifier is a feedback end and VC3.3V, the feedback end is connected with a capacitor C9 after being filtered by a capacitor and is connected with one end of a resistor R7, the other end of the resistor R7 is grounded, an output end of the integrated operational amplifier is connected with one end of a resistor R6 and one end of a resistor R8 respectively, the other end of the resistor R6 is connected with the resistor R7, the other end of the resistor R8 is connected with one end of the capacitor C10, and the other end of the capacitor C10 is grounded.
The circuit U2 is a photosensitive diode, and weak signals received by the photosensitive diode need to be input into a signal processing module after signal filtering and amplification during use.
The first stage amplifying circuit is a triode amplifying circuit and is widely applied to a plurality of electronic devices. The basic principle is to amplify an input signal to a desired level by means of the amplifying action of a transistor in order to drive a subsequent circuit or device. The triode amplifying circuit consists of an input circuit, an amplifying circuit and an output circuit. The input circuit is used for receiving an input signal and converting the input signal into a proper voltage or current signal, the amplifying circuit amplifies the input signal to a required level by utilizing the amplifying function of the triode, and the output circuit transmits the amplified signal to the next-stage circuit.
The second stage amplifying circuit is an operational amplifier amplifying circuit, and amplifies an input signal to a required level by utilizing the amplifying and operational functions of the operational amplifier so as to drive a subsequent circuit or device. The operational amplifier amplifying circuit is generally composed of an input circuit, an operational amplifier, a feedback circuit and an output circuit. The input circuit is used for receiving an input signal and converting the input signal into a proper voltage or current signal, the operational amplifier compares the amplified signal with the input signal through the feedback circuit, so that the amplifying and operational functions are realized, and the output circuit transmits the amplified signal to the next-stage circuit.
As shown in fig. 3, the signal processing module includes a controller (a singlechip stm32L 432), pins 1 and 5 of the controller are both connected with VCC3.3V, pin 4 of the controller is a system reset interface, pin 11 of the controller is a data output port, pin 15 of the controller is connected with an electric signal output end of the photosensitive receiving and signal amplifying module, pin 16 of the controller is grounded, pin 24 and pin 25 of the controller are program downloading ports of the controller, and pin 31 and pin 32 of the controller are grounded.
The signals transmitted to the signal processing module part are subjected to circuit filtering and amplifying, in the signal processing module, the ADC-16 is a photosensitive signal sampling port, and AD sampling refers to the process that analog signals are converted into digital signals through an analog-to-digital converter (ADC). In an analog signal, the amplitude of the signal is continuously variable, while a digital signal is represented by discretizing the analog signal at a certain sampling rate (i.e., sampling frequency). The higher the sampling rate, the higher the degree of discretization, and the smaller the difference between the digital signal and the original analog signal. In AD sampling, the sampling rate is chosen to take into account the highest frequency component of the signal, and the sampling frequency should be greater than twice the highest frequency component of the signal. The sampled data identifies signal characteristics (signal period, frequency, phase) via a time-frequency analysis algorithm, which refers to a method of analyzing changes in the time and frequency domains of the signal. The time-frequency analysis method can be used for more comprehensively knowing the characteristics and behaviors of the signals by locally analyzing the signals and simultaneously considering the changes of the signals in time and frequency. And then judging whether the laser signal is a normal laser signal or not, and outputting the laser signal by the 32-OUT.
As shown in fig. 4, the signal output module includes a triode Q3, the base electrode of the triode Q3 is connected with pin 11 of the controller through a resistor R10, the collector electrode of the triode Q3 is connected with VCC24V through a resistor R11, the collector electrode of the triode Q3 is connected with the base electrode of the triode Q4 through a resistor R12, the emitter electrode of the triode Q4 is connected with VCC24V, the collector electrode of the triode Q4 is connected with the positive electrode of the photodiode D2 through a resistor R13, and the negative electrode of the photodiode D2 is grounded.
When the photosensitive excitation is performed, 24V high-level output is required, the output is required to have certain load capacity, and the normal laser output signal is amplified to obtain 24V output. Because the signal output by the controller has weak load capacity, the same triode amplifying circuit as the signal amplifying part is adopted and a triode switching circuit is arranged behind the triode amplifying circuit, and the triode switching circuit is a triode-based circuit and can realize the switching control of the circuit. In the triode switch circuit, the base electrode, the emitter electrode and the collector electrode of the triode respectively correspond to the control end, the output end and the power supply end of the circuit. By controlling the base voltage, the switching control of the circuit can be realized, thereby realizing 24V high-level output.
As shown in fig. 5, the first power module includes a diode D1, an anode of the diode D1 is connected to VCC24V, a cathode of the diode D1 is connected to a collector of the triode Q1, an emitter of the triode is connected to VCC5V, a base of the triode Q1 is connected to the cathode of the diode D1 through a resistor R1, the base of the triode Q1 is connected to the cathode of the diode ZD1, an anode of the diode ZD1 is grounded, an emitter of the triode Q1 is connected to one end of the capacitor C1, and the other end of the capacitor C1 is grounded.
The diode D1 is a common Zener diode, belonging to the class of Zener diodes, and has a nominal operating voltage of 6.2V, withstanding reverse voltages up to 39V. The diode D1 can stably maintain the operation at the reverse voltage of 6.2V, and can maintain a relatively stable voltage output even under the condition of load variation and temperature variation, and the diode D1 is commonly used in the fields of regulated power supply, regulated voltage, and the like. In addition, it also has the characteristics of small reverse current, small temperature coefficient, high response speed and the like.
As shown in fig. 6, the second power module includes a power management chip, pins No. 1 and No. 3 of the power management chip are connected to VCC5V, pin No. 2 of the power management chip is grounded, pin No. 1 of the power management chip is connected to one end of a capacitor C2, the other end of the capacitor C2 is connected to pin No. 2, pin No. 4 of the power management chip is connected to one end of a capacitor C3, the other end of the capacitor C3 is grounded, and pin No. 5 of the power management chip is connected to VCC3.3V.
According to the utility model, the received photosensitive signals are processed by the spectrum recognition algorithm by selecting the small-package STM32 singlechip to obtain the spectrum information, so that the analysis of the received weak photosensitive signals is more accurately completed, the judgment capability of the interference signals is improved, the anti-interference capability is greatly improved, the miswork under a long distance is greatly reduced, the effective use distance of the opposite-type laser photoelectric sensor is increased, the opposite-type laser photoelectric sensor can realize 0-50 m, the requirements of most similar products on the market are met, the cost is greatly reduced, and the use is safer.
The foregoing description of the preferred embodiment of the utility model is not intended to be limiting, but rather is intended to cover all modifications, equivalents, and alternatives falling within the spirit and principles of the utility model.
Claims (2)
1. The laser signal receiver is characterized by comprising a transmitting end, wherein an optical signal output end of the transmitting end is connected with an optical signal input end of a photosensitive receiving and signal amplifying module, an electric signal output end of the photosensitive receiving and signal amplifying module is connected with an electric signal input end of a signal processing module, an output end of the signal processing module is connected with an input end of the signal output module, a first power module supplies power for the photosensitive receiving and signal amplifying module and a second power module, and the second power module supplies power for the signal processing module;
the photosensitive receiving and signal amplifying module comprises a receiving circuit, a signal output port of the receiving circuit is connected with a non-inverting input end of an integrated operational amplifier, a reverse input end of the integrated operational amplifier is connected with one end of a resistor R7, the other end of the resistor R7 is grounded, an output end of the integrated operational amplifier is respectively connected with one end of a resistor R6 and one end of a resistor R8, the other end of the resistor R6 is connected with the resistor R7, the other end of the resistor R8 is connected with one end of a capacitor C10, and the other end of the capacitor C10 is grounded;
the signal processing module comprises a controller, wherein a No. 1 pin and a No. 5 pin of the controller are both connected with VCC3.3V, a No. 11 pin of the controller is a data output port, a No. 15 pin of the controller is connected with an electric signal output end of the photosensitive receiving and signal amplifying module, a No. 16 pin of the controller is grounded, and a No. 24 pin of the controller is connected with a clock circuit;
the signal output module comprises a triode Q3, the base electrode of the triode Q3 is connected with the No. 11 pin of the controller through a resistor R10, the collector electrode of the triode Q3 is connected with VCC24V through a resistor R11, the collector electrode of the triode Q3 is connected with the base electrode of the triode Q4 through a resistor R12, the emitter electrode of the triode Q4 is connected with VCC24V, the collector electrode of the triode Q4 is connected with the anode of a photodiode D2 through a resistor R13, and the cathode of the photodiode D2 is grounded.
2. The laser signal receiver according to claim 1, wherein the first power module comprises a diode D1, the anode of the diode D1 is connected to VCC24V, the cathode of the diode D1 is connected to the collector of the triode Q1, the emitter of the triode is connected to VCC5V, the base of the triode Q1 is connected to the cathode of the diode D1 through a resistor R1, the base of the triode Q1 is connected to the cathode of the diode ZD1, the anode of the diode ZD1 is grounded, the emitter of the triode Q1 is connected to one end of the capacitor C1, and the other end of the capacitor C1 is grounded;
the second power module comprises a power management chip, a No. 1 pin and a No. 3 pin of the power management chip are connected with VCC5V, a No. 2 pin of the power management chip is grounded, a No. 1 pin of the power management chip is connected with one end of a capacitor C2, the other end of the capacitor C2 is connected with a No. 2 pin, a No. 4 pin of the power management chip is connected with one end of a capacitor C3, the other end of the capacitor C3 is grounded, and a No. 5 pin of the power management chip is connected with VCC3.3V.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321243657.1U CN219657867U (en) | 2023-05-22 | 2023-05-22 | Laser signal receiver |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321243657.1U CN219657867U (en) | 2023-05-22 | 2023-05-22 | Laser signal receiver |
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| Publication Number | Publication Date |
|---|---|
| CN219657867U true CN219657867U (en) | 2023-09-08 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202321243657.1U Active CN219657867U (en) | 2023-05-22 | 2023-05-22 | Laser signal receiver |
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|---|---|
| CN (1) | CN219657867U (en) |
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2023
- 2023-05-22 CN CN202321243657.1U patent/CN219657867U/en active Active
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