Signal encryption transmission system based on laser induced breakdown spectroscopy and single chip microcomputer

Abstract

The present invention discloses a signal encryption transmission system based on laser induced breakdown spectroscopy and single-chip microcomputer, which belongs to the field of signal transmission technology, and comprises a laser signal transmitting module, a laser transmission adjustment module and a spectrum signal demodulation module which are arranged in sequence, and the laser signal transmitting module comprises: a solid laser, a first single-chip microcomputer, a modulation unit, a probe, an optical transmission unit and a liftable sample pool; when the sample pool is in a first height state, the solid laser burns the sample in the sample pool, and the probe is used to detect the plasma generated by the ablation sample; the first single-chip microcomputer can modulate random numbers and interference data, plasma information and required transmission information into the laser to encrypt the transmission information; when the sample pool is in a second height state, the solid laser and the optical transmission unit can form a first optical channel. The present invention can avoid the leakage of information that is currently common during transmission, and ensure the security of information encryption transmission to the greatest extent.

Description

Technical Field

[0001] The invention belongs to the technical field of signal transmission, and in particular relates to a signal encryption transmission system based on laser induced breakdown spectroscopy and a single chip microcomputer. Background Art

[0002] Signal transmission is a key research area of ​​electronic technology. To achieve information transmission, it is necessary to design a signal transmission system that includes three modules: a transmitting module (such as a laser), a transmission module (such as a signal amplifier), and a receiving module (such as a photodiode). After the transmitting module converts the information to be transmitted into an electrical signal, it is transmitted by the propagation module, and the receiving module demodulates the electromagnetic wave and restores it to an electrical signal, thus realizing the transmission of information.

[0003] Fiber optic communication is the current mainstream signal transmission technology, which has many advantages such as large communication capacity, low signal interference, long transmission distance, and long service life. However, the laying location of fiber optic communication is fixed, and once the fiber optic cable is intercepted, there is an inevitable risk of information leakage. Summary of the invention

[0004] The purpose of the present invention is to provide a signal encryption transmission system based on laser induced breakdown spectroscopy and a single-chip microcomputer, which can avoid the leakage of information during the transmission of current common technologies.

[0005] The present invention provides the following technical solutions:

[0006] The signal encryption transmission system based on laser induced breakdown spectroscopy and single chip microcomputer comprises a laser signal transmitting module, a laser transmission adjustment module and a spectrum signal demodulation module which are arranged in sequence;

[0007] The laser signal transmitting module is used to encrypt the transmission information and modulate the encrypted transmission information into the laser for transmission; the laser transmission adjustment module is used to transmit the signal transmitted by the laser signal transmitting module, and the spectrum signal demodulation module is used to receive the signal transmitted by the laser transmission adjustment module and decrypt the transmission information;

[0008] The laser signal transmitting module comprises: a solid laser, a first single chip microcomputer, a modulation unit, a probe, an optical transmission unit and a liftable sample pool;

[0009] The solid-state laser, probe, and modulation unit are all electrically connected to the first single-chip microcomputer; the modulation unit is used to modulate the optical path, the random number generation of the first single-chip microcomputer, and the basic parameters of the solid-state laser; the sample pool can switch between two position states: a first height state and a second height state; when the sample pool is in the first height state, the solid-state laser directly irradiates the sample in the sample pool so that the laser burns the sample; the probe is located on one side of the sample pool and is used to detect the plasma generated by laser ablation of the sample; the first single-chip microcomputer can generate random numbers and interference data, and can modulate the generated random numbers and interference data, the detected plasma information, and the required transmission information into the laser to encrypt the transmission information; when the sample pool is in the second height state, the solid-state laser and the optical transmission unit can form a first optical channel to transmit the encrypted transmission information.

[0010] Optionally, the modulation unit includes a first modulator and a second modulator, the first modulator is used to modulate the random number generation of the first single chip microcomputer and the basic parameters of the solid laser; the second modulator is used to modulate the optical path;

[0011] The optical transmission unit comprises a transmission type grating, a dove prism, a first lens, a first reflector and a prism reflector which are arranged in sequence; the projection type grating, the dove prism, the first lens and the prism reflector are all provided with an adjustable base;

[0012] The transmission grating is used to modulate the wavelength band of the output laser carrier; the Dove prism is used to modulate the phase of the laser carrier; the first lens is used to converge the light beam; the first reflector and the prism reflector are both used to modulate the transmission direction of the laser carrier.

[0013] Optionally, the signal encryption transmission system also includes a first shell; the first shell covers the laser signal transmission module inside, and the first shell is provided with a transparent door and a main emission port close to the sample pool, and the main emission port is communicated with the first optical channel so that the laser carrier can be emitted out of the first shell.

[0014] Optionally, the laser signal transmitting module further comprises a first power unit, a built-in computer and an operable first display screen;

[0015] The first power unit is used to provide power to the electrical components of the laser signal transmitting module;

[0016] The built-in computer is provided with two interfaces, which are used for external devices and data transmission respectively;

[0017] The first display screen can display the power type of the first power unit, the lifting status of the sample pool, the operating parameters of the first single-chip microcomputer, the operating parameters of the optical transmission unit and the built-in computer parameters, and can adjust the operating parameters of the first single-chip microcomputer, the operating parameters of the optical transmission unit and the built-in computer parameters.

[0018] Optionally, the laser transmission adjustment module is used to receive the laser carrier emitted by the laser signal emission module, and output the laser carrier after adjusting the direction and enhancing the signal;

[0019] The laser transmission adjustment module includes: a second lens for forming a second optical channel, an optical path regulator, a third lens and a triangular prism; the second lens and the third lens are distributed at an angle, and the optical path regulator is located between the second lens and the third lens; the inclination angle of the optical path regulator can be changed, and the triangular prism is located on the side of the third lens away from the optical path regulator.

[0020] Optionally, the laser transmission adjustment module also includes: a second single-chip microcomputer and a CCD camera, the CCD camera and the optical path regulator are both electrically connected to the second single-chip microcomputer; the CCD camera is located between the second lens and the optical path regulator, and can monitor the optical properties of the laser carrier; the second single-chip microcomputer can process the monitoring data of the CCD camera and adjust the inclination angle of the optical path regulator.

[0021] Optionally, the laser transmission adjustment module further comprises a second power unit, and the second power unit is used to provide power to electrical components of the laser transmission adjustment module;

[0022] The signal encryption transmission system also includes a second shell, which covers the laser transmission adjustment module. The second shell is provided with a middle incident port and a middle exit port; the second lens faces the middle incident port, and the light emitting direction of the triangular prism faces the middle exit port.

[0023] Optionally, the laser transmission adjustment modules are multiple and adjacent to each other, and the laser transmission adjustment modules correspond to the second housing one by one, and the multiple laser transmission adjustment modules form an optical path.

[0024] Optionally, the spectrum signal demodulation module is used to demodulate and decode the received laser carrier signal to decrypt the transmission information;

[0025] The spectral signal demodulation module includes a spectrometer receiving port, a four-channel spectrometer, a single-chip microcomputer decoder and a single-chip microcomputer demodulator; the spectrometer receiving port is used to receive a laser carrier and transmit it to the four-channel spectrometer; the four-channel spectrometer is used to demodulate the received laser carrier according to a set range; the single-chip microcomputer decoder is electrically connected to the four-channel spectrometer and the single-chip microcomputer demodulator respectively; the single-chip microcomputer decoder has a set decoding system for decoding random numbers and interference data for the laser carrier of the four-channel spectrometer; the single-chip microcomputer demodulator is used to interpret the information contained in the laser carrier signal to obtain the decrypted transmission information.

[0026] Optionally, the signal encryption transmission system further comprises a third housing, wherein the spectrum signal demodulation module is covered in the third housing and a general receiving port is provided, and an operable third display screen and an external interface are provided on the third housing, wherein the third display screen is used to display the working process of demodulation and decoding and can be operated by touch screen; and the external interface is used to connect an external computer device;

[0027] The spectral signal demodulation module is also provided with a fourth lens, a third reflector and a third power unit. The fourth lens is opposite to the total receiving port, and the third reflector is located between the fourth lens and the spectrometer receiving port to form a third optical channel; the third power unit is used to power the electrical components of the spectral signal demodulation module.

[0028] Compared with the prior art, the present invention has the following beneficial effects:

[0029] In the laser signal transmitting module of the present invention, firstly, a sample is ablated by laser to obtain sample plasma information, and the first encryption of the transmitted information is implemented; then, a single chip microcomputer is used to generate a random number code and interference data, and the transmitted information together with the random number code and the interference data are recorded into the spectrum information of the laser to implement the second encryption; the setting of double encryption guarantees the security of information transmission to a great extent, so that even if any encryption is breached, the transmitted effective information cannot be truly obtained. The present invention can avoid the leakage of information that is currently common during the transmission process, and guarantees the security of information encryption transmission to the greatest extent. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0031] Figure 2 It is a schematic diagram of the enlarged structure of the laser signal transmitting module of the present invention;

[0032] Figure 3 is an enlarged structural schematic diagram of the laser transmission adjustment module of the present invention;

[0033] Figure 4It is a schematic diagram of the amplified structure of the spectrum signal demodulation module of the present invention.

[0034] In the figure, reference numeral 100 is a laser signal transmitting module, reference 200 is a laser transmission adjusting module, and reference 300 is a spectrum signal demodulating module;

[0035] 101 is a first housing, 102 is a first single-chip microcomputer, 103 is a first power main button, 104 is a first power switch button, 105 is a first normal power supply, 106 is a first UPS power supply, 107 is a first display screen, 108 is a built-in computer, 109 is a first modulator, 110 is a second modulator, 111 is a prism reflector, 112 is a probe, 113 is a first reflector, 114 is a transparent door, 115 is a first lens, 116 is a Dove prism, 117 is a sample cell, 118 is a transmission grating, and 119 is a solid laser;

[0036] 201 is a second housing, 202 is a carrying handle, 203 is a second single-chip microcomputer, 204 is a second power main button, 205 is a second power switch button, 206 is a second normal power supply, 207 is a second UPS power supply, 208 is a bottom support column, 209 is a triangular prism, 210 is a third lens, 211 is an optical path regulator, 212 is a CCD camera, and 213 is a second lens;

[0037] 301 is a third housing, 302 is a spectrometer receiving port, 303 is a four-channel spectrometer, 304 is a single-chip decoder, 305 is a third display screen, 306 is a third normal power supply, 307 is a third power main button, 308 is a third power switch button, 309 is a third UPS power supply, 310 is a single-chip demodulator, 311 is an external interface, 312 is a third reflector, and 313 is a fourth lens. DETAILED DESCRIPTION

[0038] The present invention will now be described in further detail with reference to the accompanying drawings.

[0039] It should be noted that the terms "first", "second", etc. in the specification and claims of the present invention and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the data used in this way can be interchanged where appropriate, so that the embodiments of the present invention described herein can be implemented in an order other than those illustrated or described herein. In addition, the term "comprising" and any of its variations are intended to cover non-exclusive inclusions, for example, a process, method, system, product or device that includes a series of steps or units is not necessarily limited to those steps or units clearly listed, but may include other steps or units that are not clearly listed or inherent to these processes, methods, products or devices.

[0040] like Figure 1 As shown, a signal encryption transmission system based on laser induced breakdown spectroscopy and a single-chip microcomputer is provided, comprising a laser signal transmitting module 100, a laser transmission adjustment module 200 and a spectrum signal demodulation module 300 which are arranged in sequence.

[0041] like Figure 2 As shown, the laser signal transmitting module 100 is used to encrypt transmission information and modulate the encrypted transmission information into a laser for transmission.

[0042] The laser signal transmitting module 100 includes: a solid laser 119, a first single chip microcomputer 102, a modulation unit, a probe 112, an optical transmission unit and a liftable sample pool 117; the solid laser 119, the probe 112, and the modulation unit are all electrically connected to the first single chip microcomputer 102.

[0043] The solid laser 119 is used to transmit a carrier wave, and the structure of the solid laser 119 refers to the prior art.

[0044] The modulation unit is used to modulate the optical path, modulate the random number generation of the first single-chip microcomputer 102 and the basic parameters of the solid-state laser 119. In the present embodiment, the modulation unit specifically includes a first modulator 109 and a second modulator 110. The first modulator 109 is used to modulate the random number generation of the first single-chip microcomputer 102 and the basic parameters of the solid-state laser 119; the second modulator 110 is used to modulate the optical path.

[0045] The lifting structure of the sample pool 117 can refer to the existing technology. As an option, the lifting of the sample pool 117 is driven by a stepper motor to facilitate the placement and lifting of the selected encrypted sample; the sample pool can switch between the first height state and the second height state.

[0046] When the sample pool 117 is in a first height state, the solid laser 119 directly irradiates the sample in the sample pool 117 so that the laser burns the sample. At this time, the optical transmission unit cannot form an optical channel, thereby avoiding direct transmission of the solid laser 119. Normally, the first height state refers to the height of the sample pool 117 after it rises.

[0047] The probe 112 is located at one side of the sample pool 117 and is used to detect the plasma generated by the laser ablation of the sample; the sample can be liquid, solid or gaseous, and the sample is selected according to the needs.

[0048] The first single chip microcomputer 102 can generate random numbers and interference data, and can modulate the generated random numbers and interference data, detected plasma information and required transmission information into the laser to encrypt the transmission information.

[0049] When the sample pool 117 is in the second height state, the solid laser 119 and the optical transmission unit can form a first optical channel to transmit the encrypted transmission information. Usually, the second height state refers to the height of the sample pool 117 after it is lowered; at this time, the sample pool 117 and the probe 112 do not affect the transmission of the laser carrier along the first optical channel. Of course, in some other embodiments, the probe 112 can also be provided with a translation mechanism, so that when the laser burns the sample, it can be as close to the sample pool 117 as possible, and when the first optical channel is formed, it is away from the sample pool 117.

[0050] First, the sample is ablated by laser to obtain the sample plasma information, and the first encryption is implemented; then the single-chip microcomputer is used to generate random number codes and interference data, and the transmitted information is burned into the laser spectrum information together with the random number and interference data, and the second encryption is implemented. The setting of double encryption guarantees the security of information transmission to a great extent, so that even if any encryption is broken, the effective information transmitted cannot be truly obtained.

[0051] In this embodiment, the optical transmission unit includes a transmission grating 118, a Dove prism 116, a first lens 115, a first reflector 113 and a prism reflector 111 which are arranged in sequence; the transmission grating 118, the Dove prism 116, the first lens 115 and the prism reflector 111 are all provided with adjustable bases; the transmission grating 118 is used to modulate the band of the output laser carrier; the Dove prism 116 is used to modulate the phase of the laser carrier, the first lens 115 is used to converge the light beam, and the first reflector 113 and the prism reflector 111 are both used to modulate the transmission direction of the laser carrier. Of course, in some other embodiments, multiple reflectors can be added to adjust the transmission direction of the laser carrier, or the first reflector 113 and the prism reflector 111 are not provided, that is, the laser carrier converged by the first lens 115 is directly emitted.

[0052] In this embodiment, the signal encryption transmission system also includes a first shell 101; the first shell 101 covers the laser signal transmitting module 100, and the first shell 101 is provided with a transparent door 114 and a main transmitting port close to the sample pool 117, and the main transmitting port is communicated with the first optical channel so that the laser carrier can be emitted out of the first shell 101; the transparent door 114 is made of acrylic material, which can reduce the weight of the equipment and is easy to open to place samples, and is also convenient for checking, adjusting, replacing or repairing internal equipment; a door handle made of metal can be provided on the transparent door 114 to facilitate opening of the transparent door 114.

[0053] Furthermore, the laser signal transmitting module 100 further includes a first power unit, a built-in computer 108 and an operable first display screen 107 .

[0054] The first power unit is used to provide power to the electrical components of the laser signal transmitting module 100, specifically, it can provide power to the transmission grating 118, the Dove prism 116, the first lens 115 and the adjustable base of the prism reflector 111, the first modulator 109, the second modulator 110, the built-in computer 108, the first display screen 107 and the solid laser 119.

[0055] Specifically, the first power unit includes a first normal power supply 105, a first UPS power supply 106, a first power main button 103 and a first power switching button 104; the first normal power supply 105 is for daily use, and the first UPS power supply 106 is for emergency power supply; the first normal power supply 105 and the first UPS power supply 106 are selected for use through the first power switching button 104 or are turned off at the same time through the first power main button 103, that is, the first power main button 103 is used to control the on / off state of the laser signal transmitting module 100; the first power switching button 104 can switch the use of the first normal power supply 105 or the first UPS power supply 106. By default, the electrical components of the laser signal transmitting module 100 are powered by the first normal power supply 105. When the first normal power supply 105 cannot supply power normally and stably, it switches to the first UPS power supply 106 for power supply.

[0056] The built-in computer 108 is provided with two interfaces, one for external devices and the other for data transmission. Optionally, the two interfaces are two USB 3.0 interfaces. The built-in computer 108 is configured to have a memory of not less than 8G and a main frequency of not less than 3.5GHz.

[0057] The first display screen 107 is touch-operable, and can display the power type of the first power unit (normal power supply or emergency power supply), the lifting status of the sample pool 117, the operating parameters of the first single-chip microcomputer 102, the operating parameters of the optical transmission unit and the parameters of the built-in computer 108, and can adjust the operating parameters of the first single-chip microcomputer 102, the operating parameters of the optical transmission unit and the parameters of the built-in computer 108.

[0058] Of course, in some other embodiments, the laser signal transmitting module 100 may also be provided with a restart button so as to perform self-repair on the laser signal transmitting module 100 in the event of a fault.

[0059] Furthermore, in this embodiment, if Figure 3 As shown, the laser transmission adjustment module 200 is used to receive the laser carrier emitted by the laser signal emission module 100, and output the laser carrier after adjusting the direction and enhancing the signal.

[0060] The laser transmission adjustment module 200 includes a second lens 213 for forming a second optical path, an optical path regulator 211, a third lens 210 and a triangular prism 209; the second lens 213 and the third lens 210 are distributed at an angle, and the optical path regulator 211 is located between the second lens 213 and the third lens 210; the inclination angle of the optical path regulator 211 can be changed, the triangular prism 209 is located on the side of the third lens 210 away from the optical path regulator 211, and the second lens 213 and the third lens 210 are both used to converge lasers to stabilize the laser signal; the structure of the optical path regulator 211 can refer to the prior art, and the optical path regulator 211 has an adjustable base. When there is a problem with the optical path, the inclination angle can be changed by remote control to keep the optical path normal.

[0061] In this embodiment, the laser transmission adjustment module 200 also includes a second single-chip microcomputer 203 and a CCD camera 212, and the CCD camera 212 and the optical path regulator 211 are both electrically connected to the second single-chip microcomputer 203; the CCD camera 212 is located between the second lens 213 and the optical path regulator 211, and can monitor the optical characteristics of the laser carrier; the second single-chip microcomputer 203 can process the monitoring data of the CCD camera 212 and adjust the inclination angle of the optical path regulator 211.

[0062] Furthermore, the laser transmission adjustment module 200 further includes a second power unit, which is used to provide power to the electrical components of the laser transmission adjustment module 200 .

[0063] Specifically, the second power unit includes a second normal power supply 206, a second UPS power supply 207, a second power main button 204 and a second power switching button 205; the second normal power supply 206 and the second UPS power supply 207 are controlled by the second power main button 204 to turn off both power supplies at the same time, or the second power switching button 205 is used to select one of the two power supplies; that is, the second normal power supply 206 is the default power supply end, and the second UPS power supply 207 provides emergency power supply for the electrical components of the laser transmission adjustment module 200; the second power main button 204 can control the on / off state of the laser transmission adjustment module 200.

[0064] The signal encryption transmission system also includes a second shell 201, which covers the laser transmission adjustment module 200. The second shell 201 is provided with an intermediate incident port and an intermediate exit port; the second lens 213 is directly opposite to the intermediate incident port, and the light emitting direction of the triangular prism 209 is directly opposite to the intermediate exit port; in the present embodiment, an optical path regulator 211 is provided for a first direction change, and a triangular prism 209 is provided for a second direction change. In some other embodiments, a plurality of optical path regulators 211 may be provided or a plurality of reflectors may be provided for changing the transmission direction of the laser. Of course, a plurality of lenses may also be provided to further converge the laser.

[0065] In order to facilitate carrying and moving, carrying handles 202 are provided on the upper wall and side wall of the second shell 201; a bottom support column 208 is provided on the lower bottom of the second shell 201 to stabilize the laser transmission adjustment module 200. After the laser carrier emitted by the laser signal transmitting module 100 passes through the middle incident port, it passes through the second lens 213, the CCD camera 212, the optical path regulator 211, the third lens 210 and the triangular prism 209 in sequence, and then is emitted from the middle exit port.

[0066] In some other embodiments, there are multiple adjacent laser transmission adjustment modules 200 , and the multiple laser transmission adjustment modules 200 form an optical path; the second housing 201 corresponds to the laser transmission adjustment modules 200 one by one.

[0067] As an example, there are three laser transmission adjustment modules 200. After the first laser transmission adjustment module 200 receives the laser carrier, it sends it to the second laser transmission adjustment module 200 for transmission adjustment. The third laser transmission adjustment module 200 receives the laser carrier output by the second laser transmission adjustment module 200. In actual application, the number of laser transmission adjustment modules 200 can be selected according to actual transmission requirements.

[0068] By providing the laser transmission adjustment module 200 , it is possible to avoid laying optical fibers, thereby significantly reducing the laying and maintenance costs of the optical fibers.

[0069] Furthermore, in this embodiment, if Figure 4 As shown, the spectrum signal demodulation module 300 is used to convert the laser carrier signal into an electrical signal, and then transmit it to a computer or a single-chip microcomputer for processing. The configuration requirements for the computer and the single-chip microcomputer are the same as those for the transmitting base station.

[0070] The spectrum signal demodulation module 300 includes a spectrometer receiving port 302 , a four-channel spectrometer 303 , a single-chip decoder 304 and a single-chip demodulator 310 ; the spectrometer receiving port 302 is used to receive the laser carrier and transmit it to the four-channel spectrometer 303 .

[0071] The four-channel spectrometer 303 is used to demodulate the spectral signal, and the measurement range of the spectrometer can be adjusted according to specific needs to determine the signal receiving range.

[0072] The single chip decoder 304 is electrically connected to the four-channel spectrometer 303 and the single chip demodulator 310 respectively.

[0073] The single chip decoder 304 has a preset decoding system, which can be rewritten according to actual needs and is used to decode the random number code and interference data contained in the incident laser.

[0074] The single-chip demodulator 310 can be connected to an external computer for interpreting the information contained in the laser carrier signal of the laser induced breakdown spectroscopy to obtain the decrypted transmission information; the external computer is configured to have a memory of not less than 8 G and a main frequency of not less than 3.5 GHz, and the external computer can rewrite the decoding system according to actual needs.

[0075] In this embodiment, a third shell 301 is also included. The third shell 301 covers the spectral signal demodulation module 300 and is provided with a general receiving port. The third shell 301 is provided with an operable third display screen 305 and an external interface 311. The third display screen 305 can be touched and can display the current decoding process of the single-chip microcomputer and the demodulation process of the spectral signal, and adjust the decoding and demodulation processes.

[0076] The external interface 311 is a USB 3.0 interface for connecting to an external computer device and decoding data transmission.

[0077] The spectral signal demodulation module 300 is also provided with a fourth lens 313, a third reflector 312 and a third power unit. The fourth lens 313 is opposite to the total receiving port, and the fourth lens 313 is used to converge the laser; the third reflector 312 is located between the fourth lens 313 and the spectrometer receiving port 302 to form a third optical channel, and the third reflector 312 is used to adjust the propagation direction of the optical signal.

[0078] The third power unit is used to supply power to the electrical components of the spectral signal demodulation module 300, specifically, to supply power to the four-channel spectrometer 303, the single-chip decoder 304 and the third display screen 305. The third power unit includes a third normal power supply 306, a third UPS power supply 309, a third power main button 307 and a third power switching button 308; the third normal power supply 306 and the third UPS power supply 309 can be selected for use through the third power switching button 308 or can be turned off at the same time through the third power main button 307.

[0079] The third normal power supply 306 is used to supply power to the electrical components of the spectrum signal demodulation module 300 by default, the third UPS power supply 309 is used for emergency power supply, and the third power main button 307 is used to control the on / off state of the spectrum signal demodulation module 300.

[0080] The present invention is based on a laser signal transmitting module 100 and a spectrum signal demodulation module 300, and supplemented by a laser transmission adjustment module 200. Through simple settings, it is possible to eliminate the need to lay a connecting medium during the transmission process, thereby reducing the cost of line laying and maintenance during traditional transmission. In the laser signal transmitting module 100, the present invention firstly ablates the sample by laser to obtain sample plasma information and implements the first encryption. Then, a single-chip microcomputer is used to generate a random number code and interference data, and the transmitted information and the interference data are recorded into the spectrum information of the laser to implement the second encryption. The double encryption setting ensures the security of information transmission to a great extent, so that even if any encryption is broken, the transmitted effective information cannot be truly obtained. The present invention can completely avoid the leakage of information that is currently common during information transmission, and ensures the security of information encryption transmission to the greatest extent.

[0081] The various embodiments in this specification are described in a progressive manner, and each embodiment focuses on the differences from other embodiments. The same or similar parts between the various embodiments can be referenced to each other.

[0082] The above are only preferred embodiments of the present invention, and the protection scope of the present invention is not limited to the above embodiments. All technical solutions under the concept of the present invention belong to the protection scope of the present invention. It should be pointed out that for ordinary technicians in this technical field, some improvements and modifications without departing from the principle of the present invention should be regarded as the protection scope of the present invention.

Claims

1. A signal encryption transmission system based on laser induced breakdown spectroscopy and single-chip microcomputer, characterized in that: It comprises a laser signal transmitting module (100), a laser transmission adjusting module (200) and a spectrum signal demodulating module (300) which are arranged in sequence; The laser signal transmitting module (100) is used to encrypt transmission information and modulate the encrypted transmission information into a laser for transmission; the laser transmission adjustment module (200) is used to transmit the signal transmitted by the laser signal transmitting module (100); and the spectrum signal demodulation module (300) is used to receive the signal transmitted by the laser transmission adjustment module (200) and decrypt the transmission information; The laser signal transmission module (100) comprises: a solid laser (119), a first single-chip computer (102), a modulation unit, a probe (112), an optical transmission unit and a liftable sample pool (117); The solid-state laser (119), the probe (112), and the modulation unit are all electrically connected to the first single-chip computer (102); the modulation unit is used to modulate the optical path, the random number generation of the first single-chip computer (102), and the basic parameters of the solid-state laser (119); the sample pool (117) can switch between two position states, a first height state and a second height state; when the sample pool (117) is in the first height state, the solid-state laser (119) directly irradiates the sample in the sample pool (117), so that the laser burns the sample The probe (112) is located on one side of the sample pool (117) and is used to detect the plasma generated by laser ablation of the sample; the first single-chip computer (102) is capable of generating random numbers and interference data, and is capable of modulating the generated random numbers and interference data, the detected plasma information and the required transmission information into the laser to encrypt the transmission information; when the sample pool (117) is in the second height state, the solid laser (119) and the optical transmission unit are capable of forming a first optical channel to transmit the encrypted transmission information.

2. The signal encryption transmission system based on laser induced breakdown spectroscopy and single-chip microcomputer according to claim 1 is characterized in that: The modulation unit comprises a first modulator (109) and a second modulator (110), wherein the first modulator (109) is used to modulate the random number generation of the first single-chip computer (102) and the basic parameters of the solid-state laser (119); and the second modulator (110) is used to modulate the optical path; The optical transmission unit comprises a transmission grating (118), a Dove prism (116), a first lens (115), a first reflector (113) and a prism reflector (111) which are arranged in sequence; the transmission grating (118), the Dove prism (116), the first lens (115) and the prism reflector (111) are all provided with an adjustable base; The transmission grating (118) is used to modulate the wavelength band of the output laser carrier; the Dove prism (116) is used to modulate the phase of the laser carrier; the first lens (115) is used to converge the light beam; and the first reflector (113) and the prism reflector (111) are both used to modulate the transmission direction of the laser carrier.

3. The signal encryption transmission system based on laser induced breakdown spectroscopy and single-chip microcomputer according to claim 1 is characterized in that: The signal encryption transmission system further comprises a first housing (101); the first housing (101) houses the laser signal transmitting module (100) therein, and the first housing (101) is provided with a transparent door (114) close to the sample pool (117) and a main transmitting port, wherein the main transmitting port is in communication with the first optical channel so that the laser carrier can be emitted out of the first housing (101).

4. The signal encryption transmission system based on laser induced breakdown spectroscopy and single-chip microcomputer according to claim 1 is characterized in that: The laser signal transmitting module (100) further comprises a first power unit, a built-in computer (108) and an operable first display screen (107); The first power unit is used to provide power to the electrical components of the laser signal transmitting module (100); The built-in computer (108) is provided with two interfaces, respectively used for external device connection and data transmission; The first display screen (107) is capable of displaying the power type of the first power unit, the lifting and lowering conditions of the sample pool (117), the operating parameters of the first single-chip microcomputer (102), the operating parameters of the optical transmission unit and the parameters of the built-in computer (108), and is capable of adjusting the operating parameters of the first single-chip microcomputer (102), the operating parameters of the optical transmission unit and the parameters of the built-in computer (108).

5. The signal encryption transmission system based on laser induced breakdown spectroscopy and single-chip microcomputer according to claim 1 is characterized in that: The laser transmission adjustment module (200) is used to receive the laser carrier wave emitted by the laser signal emission module (100), and to adjust the direction of the laser carrier wave and enhance the signal before outputting it; The laser transmission adjustment module (200) comprises: a second lens (213) for forming a second optical channel, an optical path regulator (211), a third lens (210) and a triangular prism (209); the second lens (213) and the third lens (210) are arranged at an angle, and the optical path regulator (211) is located between the second lens (213) and the third lens (210); the inclination angle of the optical path regulator (211) can be changed, and the triangular prism (209) is located on the side of the third lens (210) away from the optical path regulator (211).

6. The signal encryption transmission system based on laser induced breakdown spectroscopy and single-chip microcomputer according to claim 5, characterized in that: The laser transmission adjustment module (200) further comprises: a second single-chip microcomputer (203) and a CCD camera (212), wherein the CCD camera (212) and the optical path regulator (211) are both electrically connected to the second single-chip microcomputer (203); the CCD camera (212) is located between the second lens (213) and the optical path regulator (211), and is capable of monitoring the optical characteristics of the laser carrier; and the second single-chip microcomputer (203) is capable of processing monitoring data of the CCD camera (212) and adjusting the inclination angle of the optical path regulator (211).

7. The signal encryption transmission system based on laser induced breakdown spectroscopy and single-chip microcomputer according to claim 5 is characterized in that: The laser transmission adjustment module (200) further comprises a second power unit, the second power unit being used to provide power to electrical components of the laser transmission adjustment module (200); The signal encryption transmission system further comprises a second housing (201), wherein the second housing (201) covers the laser transmission adjustment module (200), and a middle incident port and a middle exit port are arranged on the second housing (201); the second lens (213) faces the middle incident port, and the light emitting direction of the triangular prism (209) faces the middle exit port.

8. The signal encryption transmission system based on laser induced breakdown spectroscopy and single-chip microcomputer according to claim 7 is characterized in that: The laser transmission adjustment modules (200) are multiple and adjacent to each other, the laser transmission adjustment modules (200) correspond one to one with the second housing (201), and the multiple laser transmission adjustment modules (200) form an optical path.

9. The signal encryption transmission system based on laser induced breakdown spectroscopy and single-chip microcomputer according to claim 1 is characterized in that: The spectrum signal demodulation module (300) is used to demodulate and decode the received laser carrier signal to decrypt the transmission information; The spectral signal demodulation module (300) comprises a spectrometer receiving port (302), a four-channel spectrometer (303), a single-chip microcomputer decoder (304) and a single-chip microcomputer demodulator (310); the spectrometer receiving port (302) is used to receive a laser carrier and transmit it to the four-channel spectrometer (303); the four-channel spectrometer (303) is used to demodulate the received laser carrier according to a set range; the single-chip microcomputer decoder (304) is electrically connected to the four-channel spectrometer (303) and the single-chip microcomputer demodulator (310) respectively; the single-chip microcomputer decoder (304) has a set decoding system, which is used to decode random numbers and interference data of the laser carrier of the four-channel spectrometer (303); the single-chip microcomputer demodulator (310) is used to interpret information contained in the laser carrier signal to obtain decrypted transmission information.

10. The signal encryption transmission system based on laser induced breakdown spectroscopy and single-chip microcomputer according to claim 1 is characterized in that: The signal encryption transmission system further comprises a third housing (301), wherein the spectrum signal demodulation module (300) is housed in the third housing (301) and is provided with a general receiving port, and an operable third display screen (305) and an external interface (311) are provided on the third housing (301), wherein the third display screen (305) is used to display the demodulation and decoding working process and can be operated by touch screen; and the external interface (311) is used to connect to an external computer device; The spectral signal demodulation module (300) is further provided with a fourth lens (313), a third reflector (312) and a third power unit; the fourth lens (313) is directly opposite to the total receiving port; the third reflector (312) is located between the fourth lens (313) and the spectrometer receiving port (302) to form a third optical channel; and the third power unit is used to supply power to electrical components of the spectral signal demodulation module (300).

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