CN116774238A - Portable communication distance measurement imaging integrated optical device and target distance measurement method - Google Patents

Portable communication distance measurement imaging integrated optical device and target distance measurement method Download PDF

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Publication number
CN116774238A
CN116774238A CN202310741497.1A CN202310741497A CN116774238A CN 116774238 A CN116774238 A CN 116774238A CN 202310741497 A CN202310741497 A CN 202310741497A CN 116774238 A CN116774238 A CN 116774238A
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China
Prior art keywords
terminal
unit
optical signal
infrared
imaging
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CN202310741497.1A
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Chinese (zh)
Inventor
郑运强
汪伟
贺元晨
聂文超
魏森涛
李鹏
白兆峰
谢小平
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XiAn Institute of Optics and Precision Mechanics of CAS
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XiAn Institute of Optics and Precision Mechanics of CAS
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Priority to CN202310741497.1A priority Critical patent/CN116774238A/en
Publication of CN116774238A publication Critical patent/CN116774238A/en
Pending legal-status Critical Current

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    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
    • G01S17/00—Systems using the reflection or reradiation of electromagnetic waves other than radio waves, e.g. lidar systems
    • G01S17/02—Systems using the reflection of electromagnetic waves other than radio waves
    • G01S17/06—Systems determining position data of a target
    • G01S17/08—Systems determining position data of a target for measuring distance only
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
    • G01S11/00—Systems for determining distance or velocity not using reflection or reradiation
    • G01S11/12—Systems for determining distance or velocity not using reflection or reradiation using electromagnetic waves other than radio waves
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
    • G01S17/00—Systems using the reflection or reradiation of electromagnetic waves other than radio waves, e.g. lidar systems
    • G01S17/86—Combinations of lidar systems with systems other than lidar, radar or sonar, e.g. with direction finders
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
    • G01S17/00—Systems using the reflection or reradiation of electromagnetic waves other than radio waves, e.g. lidar systems
    • G01S17/88—Lidar systems specially adapted for specific applications
    • G01S17/89—Lidar systems specially adapted for specific applications for mapping or imaging
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
    • G01S19/00—Satellite radio beacon positioning systems; Determining position, velocity or attitude using signals transmitted by such systems
    • G01S19/01—Satellite radio beacon positioning systems transmitting time-stamped messages, e.g. GPS [Global Positioning System], GLONASS [Global Orbiting Navigation Satellite System] or GALILEO
    • G01S19/13—Receivers
    • G01S19/24—Acquisition or tracking or demodulation of signals transmitted by the system
    • G01S19/25—Acquisition or tracking or demodulation of signals transmitted by the system involving aiding data received from a cooperating element, e.g. assisted GPS
    • G01S19/256—Acquisition or tracking or demodulation of signals transmitted by the system involving aiding data received from a cooperating element, e.g. assisted GPS relating to timing, e.g. time of week, code phase, timing offset
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
    • G01S7/00—Details of systems according to groups G01S13/00, G01S15/00, G01S17/00
    • G01S7/48—Details of systems according to groups G01S13/00, G01S15/00, G01S17/00 of systems according to group G01S17/00
    • G01S7/481—Constructional features, e.g. arrangements of optical elements
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B23/00—Telescopes, e.g. binoculars; Periscopes; Instruments for viewing the inside of hollow bodies; Viewfinders; Optical aiming or sighting devices
    • G02B23/02—Telescopes, e.g. binoculars; Periscopes; Instruments for viewing the inside of hollow bodies; Viewfinders; Optical aiming or sighting devices involving prisms or mirrors
    • G02B23/04—Telescopes, e.g. binoculars; Periscopes; Instruments for viewing the inside of hollow bodies; Viewfinders; Optical aiming or sighting devices involving prisms or mirrors for the purpose of beam splitting or combining, e.g. fitted with eyepieces for more than one observer
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B23/00—Telescopes, e.g. binoculars; Periscopes; Instruments for viewing the inside of hollow bodies; Viewfinders; Optical aiming or sighting devices
    • G02B23/12—Telescopes, e.g. binoculars; Periscopes; Instruments for viewing the inside of hollow bodies; Viewfinders; Optical aiming or sighting devices with means for image conversion or intensification

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  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Radar, Positioning & Navigation (AREA)
  • Remote Sensing (AREA)
  • General Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Astronomy & Astrophysics (AREA)
  • Optics & Photonics (AREA)
  • Optical Communication System (AREA)

Abstract

The application relates to a portable communication distance measurement imaging integrated optical device and a target distance measurement method, wherein the device comprises the following components: the device comprises a visible light telescope unit, an infrared emission unit, an infrared receiving unit, a signal processing unit and an imaging expansion assembly; the infrared transmitting unit is used for transmitting infrared light at a speed, the infrared receiving unit is used for receiving infrared light beams, the signal processing unit is used for achieving ranging of targets, and the imaging expansion assembly is used for achieving target imaging. The application integrates communication, navigation and remote sensing, has the functions of optical communication, visible light telescopic imaging, position, distance and speed information acquisition and the like, can provide space multidimensional information, and is very suitable for the fields of situation awareness, special communication and the like.

Description

Portable communication distance measurement imaging integrated optical device and target distance measurement method
Technical Field
The application relates to the technical field of optical communication, in particular to a portable communication distance measurement imaging integrated optical device and a distance measurement method.
Background
Information is a carrier of human activities and social developments, and communication information, location information, distance information and image information are the most basic information, and are extremely important to acquire, process and transmit. In the prior art, a technology for integrating a communication positioning terminal and a telescopic imaging terminal exists, however, the technology is essentially a radio communication terminal, the confidentiality is poor, and the technology cannot be used in radio silence and electromagnetic strong interference environments; most importantly, the visual telescopic and imaging functions are not provided, and a user cannot clearly observe targets beyond the sight line through eyes to sense and image the targets, so that situation sensing cannot be completed well. In the aspect of portability, in order to achieve alignment, the current atmospheric laser communication adopts a tracking terminal, but the mode makes the volume and the weight of the terminal larger, and cannot achieve handheld and wearable application.
Disclosure of Invention
In order to overcome at least one defect in the prior art, the application provides a portable communication ranging imaging integrated optical device and a ranging method.
In a first aspect, there is provided a portable communication ranging imaging integrated optical device comprising: the device comprises a visible light telescope unit, an infrared emission unit, an infrared receiving unit, a signal processing unit and an imaging expansion assembly; the visible light telescope unit is used for realizing visible light telescope, the infrared emission unit is used for realizing infrared light speed emission, the infrared receiving unit is used for realizing infrared light beam receiving, the signal processing unit is used for realizing target ranging, and the imaging expansion assembly is used for realizing target imaging.
In one embodiment, the visible light telescope unit comprises a first telescope tube unit and a second telescope tube unit, the first telescope tube unit comprises a first lens cone, and a first objective lens group, a first dichroic mirror, a first prism group, a beam splitter and a first eyepiece group are sequentially arranged in the first lens cone along the visible light propagation direction; the second telescope tube unit comprises a second lens tube, and a second objective lens group, a second dichroic mirror, a second prism group and a second eyepiece group are sequentially arranged in the second lens tube along the visible light propagation direction.
In one embodiment, the infrared transmitting unit comprises a signal modulating unit, a constant current driving unit, a light source, a beam shrinking mirror, a reflecting mirror, a first dichroic mirror and a first objective lens group, and the infrared receiving unit comprises a second objective lens group, a second dichroic mirror, a thermal reflecting mirror, a beam shrinking mirror, an optical filter, a detector and a signal receiving circuit.
In one embodiment, the signal processing unit includes a signal processor, a sampling module, a gain module, and a GNSS module.
In one embodiment, the imaging extension includes an image sensor, an image processor, and an image display module.
In one embodiment, the signal processing unit is configured to achieve ranging of a target, and includes:
recording GNSS time information t1 and pulse count of the optical signal sent by the terminal A to the terminal B for the first time; the optical signal is provided with GNSS time information t1 and pulse count;
acquiring GNSS time information t1' and pulse count in an optical signal sent by a terminal B to a terminal A;
and calculating the difference between the GNSS time information t1 of the optical signal sent by the terminal A for the first time and the GNSS time information tN' in the optical signal received by the terminal B for the nth time, multiplying the difference by the speed of light, and dividing the multiplied difference by N to obtain the distance between the terminal A and the terminal B.
In a second aspect, there is provided a target ranging method, including:
step 1, a terminal A transmits an optical signal to a terminal B and records GNSS time information and pulse count of the optical signal transmitted for the first time; the optical signal is provided with GNSS time information t1 and pulse count;
step 2, after receiving the optical signal sent by the terminal a, the terminal B sends the received optical signal to the terminal a, where the sent optical signal includes GNSS time information t1' and a pulse count at the time, and the pulse count at the time is added by 1 on the basis of the pulse count of the received optical signal;
and 3, repeating the processes from the step 1 to the step 2 for N times, calculating the difference value between the GNSS time information t1 of the optical signal transmitted by the terminal A for the first time and the GNSS time information tN' in the optical signal transmitted by the terminal B received for the nth time, multiplying the difference value by the speed of light, and dividing the difference value by N to obtain the distance between the terminal A and the terminal B.
Compared with the prior art, the application has the following beneficial effects:
1. the application fills the blank of a communication ranging and visible light telescopic imaging integrated system based on the optical carrier wave, and realizes the 'on-line' and 'measuring quasi-state' of 'while' seeing. The traditional communication equipment, the telescopic equipment and the imaging equipment are mutually independent, and at least two sets of equipment are required to be carried. The application integrates multiple systems integrally, realizes the amplification, communication, positioning, distance measurement, speed measurement and imaging of targets in and out of the viewing distance based on reasonable design of the optical-mechanical structure, reasonable multiplexing of the components and reasonable design of the distance measurement frame, can realize the acquisition of target images, the acquisition of position information, the real-time communication and transmission in real time, and is particularly suitable for the application of individual equipment, outdoor exploration, rescue and relief, accurate striking of accurate positions, high-confidentiality information transmission and the like.
2. The application solves the problem of light weight and miniaturization of the terminal. The application omits special aiming terminal, independent beacon light and special hardware required by distance measurement, and is particularly suitable for portable application scenes such as hand-held type, head-wearing type and the like. In addition, the system multiplexes the optical machine structure, the objective lens group, the prism group, the spectroscope and the like based on the scheme of the visible light and infrared light common front end optical system by reasonable fusion design of the visible light divergence angle, the infrared divergence angle and the detector field angle, thereby reducing the number of required components and the length of the optical system. And finally, filling the ranging information frame into the communication frame, and realizing ranging based on multiple round trip transmission of the communication signal without special setting of a hardware circuit and a photoelectric detector. The three approaches greatly reduce the volume and the weight of the system, compress the original tens of kilograms of terminals to within one kilogram, and can realize the portable application of the terminals.
Drawings
The application may be better understood by reference to the following description taken in conjunction with the accompanying drawings, which are incorporated in and form a part of this specification, together with the following detailed description. In the drawings:
FIG. 1 shows a schematic structural diagram of a portable communication ranging imaging integrated optical device according to an embodiment of the present application;
FIG. 2 shows a schematic structural diagram of an infrared emission unit according to an embodiment of the present application;
fig. 3 shows a schematic structural view of an infrared receiving unit according to an embodiment of the present application;
fig. 4 shows a schematic diagram of the structure of a signal processing unit and an interface unit according to an embodiment of the present application.
Detailed Description
Exemplary embodiments of the present application will be described hereinafter with reference to the accompanying drawings. In the interest of clarity and conciseness, not all features of an actual embodiment are described in the specification. It will of course be appreciated that in the development of any such actual embodiment, numerous implementation-specific decisions may be made to achieve the developers' specific goals, and that these decisions may vary from one implementation to another.
It should be noted here that, in order to avoid obscuring the present application due to unnecessary details, only the device structures closely related to the solution according to the present application are shown in the drawings, and other details not greatly related to the present application are omitted.
It is to be understood that the application is not limited to the described embodiments, as a result of the following description with reference to the drawings. In this context, embodiments may be combined with each other, features replaced or borrowed between different embodiments, one or more features omitted in one embodiment, where possible.
The application provides a portable communication distance measurement imaging integrated optical device, in the process of communication among a plurality of observers, each observer holds a wireless optical communication device, or wears the wireless optical communication device on the head, two wireless optical communication devices carried by every two observers are paired with each other, and the two mutually paired observers are separated by a certain distance (the distance can be dynamically changed) to realize information transmission in motion, so that wireless communication, distance measurement, visible light telescope and imaging can be realized. Networking communication is achieved between a plurality of devices by a multiple access multiplexing technique that may be selected from one or more of Code Division Multiple Access (CDMA), wavelength Division Multiple Access (WDMA), time Division Multiple Access (TDMA).
The portable optical terminal provided by the application is a portable terminal integrated with optical communication, ranging, telescopic and imaging, and can realize business data receiving and transmitting, voice communication, GNSS information, ranging, speed measuring and visual target searching. The method has important application in the aspects of disaster relief, battlefield situation awareness, secret communication under electromagnetic silence, high-reliability communication under electromagnetic interference environment, outdoor operation, exploration and the like. Specific applications thereof are exemplified as follows:
(1) Disaster-resistant emergency rescue
Under natural disaster conditions such as earthquake, collapse, typhoon and the like, on-site images, disaster areas, geographic coordinates and communication guarantee of disasters are extremely important, which provides important support for scientific decisions and rapid rescue-! Traditional rescue individual equipment (such as interphones, telescopes, optical distance meters, navigation terminals and the like) are independent, and cannot provide comprehensive and efficient field data for the scenes. Taking the venturi earthquake of 2008 as an example, the portable optical terminal can take a field picture and mark the geographic coordinates and the area size on the spot by field personnel or disaster relief personnel, and then the portable optical terminal is transmitted to a rear command part through a self-contained wireless optical signal, so that the information island of the disaster area in the earthquake can be effectively broken.
(2) Battlefield situation awareness
High accuracy acquisition and real-time transmission of out-of-line-of-sight situation information in the battlefield is of paramount importance. The optical terminal has the functions of visible light telescope, imaging and data transmission, can ensure the visual observation and imaging of a target and the transmission of images, realizes 'visible shooting and transmission', and provides accurate basis for battlefield situation acquisition, data transmission and rear decision.
(3) Reliable and secure communication in electronic warfare and special electromagnetic scenarios
Electronic countermeasure mainly occurs in two more frequency bands: the portable optical terminal carries out data receiving and transmitting based on light waves, the frequency of the light waves exceeds the frequency band (3 KHz-300 GHz) and the radar frequency band (30 MHz-300 GHz), and the electronic warfare cannot cause effective interference to the light wave frequency band, so that reliable communication is realized. Under the electromagnetic silence condition, the radio communication equipment cannot transmit signals, the traditional radio frequency/microwave communication cannot effectively establish a communication link, and the portable optical terminal is relatively free from the limitation of electromagnetic silence, so that secret communication can be realized.
(4) Outdoor work and quest
And the method has wide application in the fields of outdoor operation, exploration and the like. The device can replace the current scattered devices such as interphones, telescopes, positioning devices and the like. The operation and exploration personnel can realize the telescope and imaging of the operation and exploration area by carrying the equipment, and can control the site situation in real time.
Fig. 1 shows a schematic structural diagram of a portable communication ranging imaging integrated optical device according to an embodiment of the present application, referring to fig. 1, the device includes: the device comprises a visible light telescope unit, an infrared emission unit, an infrared receiving unit, a signal processing unit, an imaging expansion assembly and an interface unit. The specific structure and implementation functions of each module are described in detail below.
The visible light telescope unit comprises a first telescope tube unit and a second telescope tube unit, the first telescope tube unit comprises a first lens cone, and a first objective lens group, a first dichroic mirror, a first prism group, a beam splitter and a first eyepiece group are sequentially arranged in the first lens cone along the visible light propagation direction; the second telescope tube unit comprises a second lens tube, and a second objective lens group, a second dichroic mirror, a second prism group and a second eyepiece group are sequentially arranged in the second lens tube along the visible light propagation direction.
Here, the first telescope tube unit differs from the second telescope tube unit in that a beam splitter is provided for reflecting light to the imaging expansion assembly. The objective lens group, the prism group and the eyepiece group realize a certain multiple of magnification of an observation target and a system field angle. In this example, a target magnification of 7 times, a field angle of 6 °, and a signal light wavelength of 1550nm was achieved. The prisms in the prism group adopt the sweat-free prism ridge to realize 180-degree rotation of the image, and the sweat-free prism ridge is adopted to ensure that the structure is compact, the length of the optical lens barrel can be shortened, and the miniaturization and the light weight are facilitated. The dichroic mirror is based on a film system design, so that the total transmission (the efficiency is more than or equal to 90%) of optical signals with the wavelength smaller than 1545nm is realized, the optical signals transmitted by the first dichroic mirror enter a first prism group and a first eyepiece group, and the optical signals transmitted by the second dichroic mirror enter a second prism group and a second eyepiece group, so that the visible light telescope is realized; the second dichroic mirror totally reflects the optical signal with the wavelength larger than 1545nm (the efficiency is more than or equal to 90 percent), and the reflected light enters the infrared receiving unit. The beam splitter splits the light beam before entering the eyepiece group into two parts for respectively providing visible light telescope and imaging.
Fig. 2 shows a schematic structural diagram of an infrared emission unit according to an embodiment of the present application, referring to fig. 2, the infrared emission unit includes a signal modulation unit, a constant current driving unit, a light source, a beam shrinking mirror, a reflecting mirror, a first dichroic mirror, and a first objective lens group, and the infrared emission unit and the first telescope tube unit share the first objective lens group. Here, the infrared emission unit is used to achieve electro-optical conversion and beam shrinking and emission of infrared light signals.
The constant current driving unit comprises a Metal-Oxide-Semiconductor Field-Effect Transistor (MOSFET), a driver and a filter capacitor; the modulation circuit is a MOSFET switching circuit and is used for modulating the service data signal output by the signal processor to the constant current driving unit, and the service data signal is used for realizing the 'switching' control of the light source. The light source may be a Light Emitting Diode (LED) or a Laser Diode (LD), and the exit pupil optical power thereof is strictly limited to 10mw or less in consideration of the restrictions of the absolute safety of human eyes, the cruising of the portable terminal, and the like. The first objective lens group and the beam shrinking lens realize the shaping of the infrared beam and emit the infrared beam into the caliber of the reflecting mirror according to a certain divergence angle so as to fully utilize the optical power, the divergence angle is selected directly related to the optical power, the farthest communication distance and the like, and the divergence angle of the infrared beam can be designed to be 1-10 degrees. The reflecting mirror reflects the communication light signal to the dichroic mirror, and then the communication light signal is emitted by the first objective lens, so that the beam combination of the communication light beam and the telescope light beam is realized, and the beam combination light is emitted after the divergence angle is reduced by the emission objective lens. The infrared emission unit is arranged in the off-axis direction of the visible light, so that the visible light telescope and imaging are not affected.
Fig. 3 shows a schematic structural diagram of an infrared receiving unit according to an embodiment of the present application, referring to fig. 3, the infrared receiving unit includes a second objective lens group, a second dichroic mirror, a heat reflecting mirror, a beam shrinking mirror, an optical filter, a detector, and a signal receiving circuit. Here, the infrared receiving unit realizes functions of infrared beam receiving, beam shrinking, photoelectric conversion, pre-amplification and the like.
The light beam reaches the second dichroic mirror through the second objective group, the second dichroic mirror totally reflects the light signal with the wavelength of more than 1545nm (the efficiency is more than or equal to 90 percent), and the reflected light enters the hot reflecting mirror and is received by the detector after passing through the beam shrinking mirror and the optical filter. The second objective group and the beam shrinking lens are used for receiving and shaping infrared beams, and shrinking the received light spot diameter to the size of 1/2 photosurface. In order to improve the signal to noise ratio, a narrow-band filter is plated on the beam shrinking lens, the central wavelength of the narrow-band filter is the wavelength of infrared signals, and the bandwidth of the narrow-band filter is +/-20 nm. The detector can be an avalanche diode (APD) detector and a photoelectric detector (PIN) detector in an infrared band, so that the received infrared light signal is converted into a weak electric signal, the photosensitive surface of the detector is as large as possible to improve the receiving field of view. The signal receiving circuit comprises a transimpedance amplifier and a loop compensation circuit, wherein the transimpedance amplifier chip is OPA658, so that signal filtering and conversion of current signals into voltage signals are realized, and the voltage signals are sent into the signal processing unit for further processing.
In the above embodiment, the infrared receiving unit and the infrared transmitting unit are respectively disposed in the first telescope tube unit and the second telescope tube unit in physical space, so that the receiving and transmitting isolation is realized in physical space, the signal-to-noise ratio is ensured, and the bidirectional duplex communication can be realized.
Fig. 4 is a schematic structural diagram of a signal processing unit and an interface unit according to an embodiment of the present application, referring to fig. 4, the signal processing unit includes a signal processor, a sampling module, a gain module, a GNSS module, and the signal processor further includes a storage module, an analog-to-digital converter, and the like.
The signal processor can select ZYNQ7030 of XILINX company to realize self-adaptive amplification, baseband data extraction, geographic position information acquisition, ranging and the like; the gain module realizes automatic adjustment of the amplification factor of the amplifier, and the amplified electric signal is sent to the sampling module (model AD 9629), so that the acquisition, self-adaptive amplification, average value extraction and binarization processing of the analog electric signal are realized, and the logic judgment of 0 and 1 of data is realized, so that the signal processor extracts baseband data. The signal processing unit is provided with a GNSS module, and the GNSS module (model UM 220) is taken as an example, so that the positioning accuracy is 2m and the speed measurement accuracy is 0.1m/s; the GNSS module outputs longitude, latitude and elevation information, and the signal processing unit performs data processing on the information to acquire speed information and attitude information extraction. For distance measurement requirements, a measurement information frame is added in a protocol, and after N times of transmission of the transmission pulse count, the reception pulse count and the GNSS time information are carried out in the measurement information frame which is locally transmitted, GNSS interpolation is the flight time of the optical signal, and the distance between two ends of communication can be calculated further. The storage module is used for storing business data, voice data, geographic position information and the like output by the signal processor, and local storage of the data is realized. In addition, in order to improve the signal-to-noise ratio and the communication distance, an RS error correction code is designed in software of the signal processor.
The interface unit comprises a voice module, a network module, a USB module, a status indicator lamp, a solar battery and a microphone/earphone. Here, the voice module may adopt WT2003HB01, integrates audio ADC acquisition and DAC playback, and earphone driving, and may implement microphone voice signal acquisition and earphone playback. The solar battery is arranged on the shell of the device, so that power supply to equipment can be realized, and the device is suitable for outdoor use. The application designs a man-machine interface to facilitate the rapid alignment and communication of the receiving and transmitting parties, and the change trend of the received signal strength is simultaneously reminded by beeping sound and the flashing frequency of the indicator lamp. The network module can adopt a KSZ9031RNX chip, the chip is compatible with 1000M/100M rate, and the MAC part is completed by a signal processor core, so that the terminal can be used as network equipment to realize the receiving and transmitting of Ethernet data, and the network module is very suitable for being used in the scenes of no network cable layout, real-time intercom and the like in extreme environments, such as disaster relief and rescue, last kilometer communication and the like, and can realize the grid connection or off-line application with other communication equipment.
The imaging expansion assembly comprises an image sensor, an image processor, an image display module and the like, the beam splitter in the first telescope tube unit is a half-reflecting half-lens, and the beam splitter is arranged between the first prism group and the first eyepiece group and divides a light beam into two parts, so that the optical path of the telescope and the optical path of the imaging expansion assembly are organically combined together. And selecting a proper condensing lens according to the area of the detector of the image sensor, so that the field of view of the telescope is completely consistent with the field of view of the imaging expansion assembly, and' what you see is what you get. The telescope and shooting are not affected, the telescope and the imaging expansion assembly can be simultaneously operated, and the telescope and the imaging expansion assembly are linked naturally without a special linkage mechanism.
Specifically, a C-type interface or a CS interface is left on the first barrel for the disassembly and assembly of the imaging extension assembly. It is worth to be noted that, the imaging expansion assembly can also adopt the existing common industrial cameras on the market to realize the acquisition processing and display of the images. In the example, a large constant image MER2-507-23GC industrial camera is selected, and the resolution is 2592 multiplied by 1944 and the frame frequency is 23fs.
In conclusion, the portable communication distance measurement imaging integrated optical device can automatically realize voice communication, network communication, distance measurement, geographic information acquisition, speed measurement and visible light telescope and imaging on a distance of 1 m-5 km, and a plurality of devices and additional operations are not required to be carried by a user.
When a user presses a ranging button on a portable communication ranging imaging integrated optical device (also called a terminal), the device works in a ranging mode, at the moment, an optical signal emitted by an infrared emission unit is a periodic pulse with fixed frequency, and in the ranging mode, measurement information is contained in a protocol frame format of the optical signal, wherein the measurement information comprises GNSS time information, an emitted pulse count, a received pulse count and the like. The specific ranging method comprises the following steps:
step 1, a terminal A transmits an optical signal to a terminal B and records GNSS time information and pulse count of the optical signal transmitted for the first time; the optical signal carries GNSS time information t1 and pulse count. Here, to prevent the receiving end from receiving no signal, the terminal a continuously transmits a protocol frame including GNSS time information record and pulse count.
Step 2, after receiving the optical signal sent by the terminal a, the terminal B sends the received optical signal to the terminal a, where the sent optical signal includes GNSS time information t1' and a pulse count at the time, and the pulse count at the time is added by 1 on the basis of the pulse count of the received optical signal;
and 3, repeating the processes from the step 1 to the step 2 for N times, calculating the difference value between the GNSS time information t1 of the optical signal transmitted by the terminal A for the first time and the GNSS time information tN' in the optical signal transmitted by the terminal B received for the nth time, multiplying the difference value by the speed of light, and dividing the difference value by N to obtain the distance between the terminal A and the terminal B. Here, the terminal a determines the number of times of transmission of the optical signal from the pulse count, and determines the number of times of reception of the optical signal from the pulse count in the received optical signal.
In summary, the application has the following technical effects:
1. the application integrates the visible light telescope, visible light imaging, optical communication and distance measurement, and can be used as a common telescope to realize the visible light telescope; the digital camera can be used for displaying and storing shooting graphics; the device can be used as communication and ranging equipment, and can realize high-confidentiality communication and ranging while seeing a target.
2. The application has no limitation of using spectrum resources, has large bandwidth of the light wave carrier, can accommodate more channels, is not limited by electromagnetic spectrum, and can be used without application;
3. the application has strong anti-interference capability, the frequency band of the light wave carrier is far higher than the electromagnetic interference frequency band, and the application is particularly suitable for data transmission in complex electromagnetic environment and high secret communication in radio silence condition.
4. The application integrates communication, navigation and remote sensing, has the functions of optical communication, visible light telescopic imaging, position, distance and speed information acquisition and the like, can provide space multidimensional information, and is very suitable for the fields of situation awareness, special communication and the like.
The above description is merely illustrative of various embodiments of the present application, but the scope of the present application is not limited thereto, and any person skilled in the art can easily think about variations or substitutions within the scope of the present application, and the application is intended to be covered by the scope of the present application. Therefore, the protection scope of the present application shall be subject to the protection scope of the claims.

Claims (7)

1. A portable communication ranging imaging integrated optical device, comprising: the device comprises a visible light telescope unit, an infrared emission unit, an infrared receiving unit, a signal processing unit and an imaging expansion assembly; the infrared transmitting unit is used for transmitting infrared light at a speed, the infrared receiving unit is used for receiving infrared light beams, the signal processing unit is used for achieving ranging of targets, and the imaging expansion assembly is used for achieving target imaging.
2. The device according to claim 1, wherein the visible light telescope unit comprises a first telescope tube unit and a second telescope tube unit, the first telescope tube unit comprises a first lens barrel, and a first objective lens group, a first dichroic mirror, a first prism group, a beam splitter and a first eyepiece group are sequentially arranged in the first lens barrel along the propagation direction of visible light; the second telescope tube unit comprises a second lens cone, and a second objective group, a second dichroic mirror, a second prism group and a second eyepiece group are sequentially arranged in the second lens cone along the visible light propagation direction.
3. The apparatus of claim 1, wherein the infrared emission unit comprises a signal modulation unit, a constant current drive unit, a light source, a beam expander, a mirror, a first dichroic mirror, and a first objective lens group, and the infrared receiving unit comprises a second objective lens group, a second dichroic mirror, a thermal mirror, a beam expander, a filter, a detector, and a signal receiving circuit.
4. The apparatus of claim 1, wherein the signal processing unit comprises a signal processor, a sampling module, a gain module, and a GNSS module.
5. The apparatus of claim 1, wherein the imaging extension comprises an image sensor, an image processor, and an image display module.
6. The apparatus of claim 1, wherein the signal processing unit is configured to achieve ranging of a target, comprising:
recording GNSS time information t1 and pulse count of the optical signal sent by the terminal A to the terminal B for the first time; the optical signal is provided with GNSS time information t1 and pulse count;
acquiring GNSS time information t1 in optical signals sent by terminal B to terminal A ′ And pulse counting;
when computing GNSS of terminal A first transmitting optical signalInter-information t1, and GNSS time information tN in the optical signal transmitted by the Nth received terminal B ′ And multiplying the difference by the speed of light and dividing by N to obtain the distance between the terminal A and the terminal B.
7. A target ranging method, comprising:
step 1, a terminal A transmits an optical signal to a terminal B and records GNSS time information and pulse count of the optical signal transmitted for the first time; the optical signal is provided with GNSS time information t1 and pulse count;
step 2, after receiving the optical signal sent by the terminal a, the terminal B sends the received optical signal to the terminal a, where the sent optical signal has GNSS time information t1 at that time ′ And a pulse count at this time, which is increased by 1 on the basis of the pulse count of the received optical signal;
step 3, repeating the processes of step 1-step 2 for N times, and calculating GNSS time information t1 of the optical signal transmitted by the terminal A for the first time and GNSS time information tN of the optical signal transmitted by the terminal B received by the N-th time ′ And multiplying the difference by the speed of light and dividing by N to obtain the distance between the terminal A and the terminal B.
CN202310741497.1A 2023-06-21 2023-06-21 Portable communication distance measurement imaging integrated optical device and target distance measurement method Pending CN116774238A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202310741497.1A CN116774238A (en) 2023-06-21 2023-06-21 Portable communication distance measurement imaging integrated optical device and target distance measurement method

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202310741497.1A CN116774238A (en) 2023-06-21 2023-06-21 Portable communication distance measurement imaging integrated optical device and target distance measurement method

Publications (1)

Publication Number Publication Date
CN116774238A true CN116774238A (en) 2023-09-19

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Country Status (1)

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