CN117452379A - Detection device for converging multiple light sources - Google Patents
Detection device for converging multiple light sources Download PDFInfo
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- CN117452379A CN117452379A CN202311408065.5A CN202311408065A CN117452379A CN 117452379 A CN117452379 A CN 117452379A CN 202311408065 A CN202311408065 A CN 202311408065A CN 117452379 A CN117452379 A CN 117452379A
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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
- 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
- G01S7/4817—Constructional features, e.g. arrangements of optical elements relating to scanning
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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
- 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
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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
- 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
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Abstract
The invention discloses a detection device for converging various light sources, which is characterized in that a rotary seat which rotates or deflects around the central shaft of the rotary seat is driven by a rotary motor, the center of the rotary seat is provided with a coaxial central hole through which a detection source signal passes, a pitch angle control unit arranged on the rotary seat is provided with a main-inverse/transparent control mirror formed by a wave band beam splitter or an optical wave band filter for separating wave band light beams according to the wavelength wave band of the light beams, and a detection unit of multiple light sources. The synchronous work of a plurality of detection sources with the rotation angle and the pitch angle can be arranged, so that the mutual calibration among the multiple signal arrays is realized, the detection precision is improved, and the sensitivity of the detection on the stealth target is increased. The plurality of detection sources are fixedly arranged, and only the pitching angle control unit participates in rotation, so that the structure is simple and reliable.
Description
Technical Field
The invention belongs to the technical field of flying target detection, and particularly relates to a detection device for converging various light sources.
Background
The detection and tracking of the current unmanned aerial vehicle targets and airport bird targets have a plurality of difficulties. In the aspect of radar detection, radar has the limitation that all moving targets cannot be reacted; because unmanned aerial vehicle generally comprises balsawood and composite material, birds are the organism, and this material has the wave-transparent characteristic, makes it have lower detectability, only metal material such as motor, engine, battery, wire, and it is small to add individual head, and this all greatly reduced the radar scattering area of target self, reduced the distance and the discovery probability of being surveyed by the radar, also shortened ground reaction's time.
In addition, in the aspect of acoustic detection, noise of the unmanned aerial vehicle target is mainly engine noise and air disturbance noise generated in the flight process, but at present, most of flight power of the unmanned aerial vehicle target is electrodynamic force, the noise is small, and the flight speed is slow, so that the noise level is low, and the problem of difficult detection exists.
In the aspect of photoelectric detection, at present, a plurality of detection sources are arranged on one platform by utilizing one platform, so that integration of signals of the plurality of detection sources is realized, however, the platform can only generate a reciprocating swing type platform, the swing speed is slow, the interval time of signals is long, and the capability of the unmanned stealth aircraft is insufficient.
The existing detection technologies are mutually independent, so that the phase angle and the pitch angle among different detection sources are difficult to be completely consistent, and an additional control system is required to be added for converting and integrating signals of the different detection sources.
In order to solve the above problems, the present technical solution proposes a detection device that uses a band beam splitter or a band filter to combine a beam splitter with a fixed wavelength, performs multiple separation on beams with different wavelengths that are transmitted by coaxial/paraxial optics and that use active detection and passive detection, and implements effective separation on light waves in the thermal infrared band, the detection laser band, the visible light band, the ultraviolet light band, and the like, and combines a scanning platform, thereby implementing simultaneous detection on at least two passive signal sources in a completely equal phase, and implementing a convergence of multiple light sources.
The information disclosed in this background section is only for enhancement of understanding of the general background of the invention and should not be taken as an acknowledgement or any form of suggestion that this information forms the prior art already known to a person of ordinary skill in the art.
Disclosure of Invention
The object of the present invention is to provide a detection device that combines a plurality of light sources, thereby overcoming the above-mentioned drawbacks of the prior art.
It should be noted that the disclosure is based on the application expansion of the present company's prior application CN 202210719105-a rotary remote optical scanning device with adjustable scanning range, and the pitch angle control unit and the rotary base are designed by referring to the text of the prior application.
In order to achieve the above object, the present invention provides a detection device for converging multiple light sources, comprising a rotating seat rotating around a central axis, wherein the center of the rotating seat is provided with a central hole for a detection source signal to pass through, a pitch angle control unit is arranged on the rotating seat, and a reflecting mirror is arranged on the end face of the pitch angle control unit, and the detection device is characterized in that a main-reflection/transmission control mirror working in cooperation with the reflecting mirror is arranged below the central hole, a first glass slide mirror is arranged on one side of a reflecting surface of the main-reflection/transmission control mirror, a first total reflecting mirror is arranged on one side of a transmitting surface of the first glass slide mirror, a converging lens and a laser receiving sensor are arranged on one side of the reflecting surface of the first glass slide mirror, and a converging lens and a thermal infrared sensor are arranged on the outgoing light path side of the first total reflecting mirror; a second glass slide mirror is arranged on one side of the transmission surface of the main-reflection/transmission control mirror, a second total reflection mirror is arranged on one side of the transmission surface of the second glass slide mirror, a converging lens and an ultraviolet light sensor are arranged on one side of the reflection surface of the second glass slide mirror, and a converging lens and a visible light sensor are arranged on one side of the reflection surface of the second total reflection mirror;
The main-reflecting/transparent control mirror, the second glass slide mirror and the second total reflecting mirror are respectively provided with a light through hole which is axially communicated with the central hole of the rotating base; the back of the second total reflecting mirror is provided with a laser, and laser emitted by the laser sequentially passes through the second total reflecting mirror, the second glass slide mirror, the main-inverse/transparent control mirror, the rotating seat and the reflecting mirror to be projected onto an object to be detected.
The detection device for converging various light sources comprises a rotating seat rotating around a central shaft, wherein the center of the rotating seat is provided with a central hole for a detection source signal to pass through, the rotating seat is provided with a pitching angle control unit, and the end face of the pitching angle control unit is provided with a reflecting mirror; a second glass slide mirror is arranged on one side of the transmission surface of the main-reflection/transmission control mirror, a second total reflection mirror is arranged on one side of the transmission surface of the second glass slide mirror, a converging lens and a laser receiving sensor are arranged on one side of the reflection surface of the second glass slide mirror, and a converging lens and a thermal infrared sensor or a visible light sensor are arranged on one side of the reflection surface of the second total reflection mirror;
The main-reflection/transmission control mirror, the second glass slide mirror and the second total reflection mirror of the laser receiving sensor are respectively provided with a light through hole which is axially communicated with the central hole of the rotating base; the back of the second total reflecting mirror is provided with a laser, and laser emitted by the laser sequentially passes through the second total reflecting mirror, the second glass slide mirror, the main-inverse/transparent control mirror, the rotating seat and the reflecting mirror to be projected onto an object to be detected.
Preferably, in the above technical solution, the main-inverse/transparent control mirror is an optical band beam splitter or a band filter that can split the light beam according to a wavelength band of the light beam.
Preferably, in the above technical solution, the laser, the light-passing hole of the second glass slide mirror, the light-passing hole of the second total reflection mirror, the coaxial center hole of the rotating seat and the reflection mirror of the pitch angle control unit form an active detection transmitting light path; a reflecting mirror of the elevation angle control unit, a main-inverse/perspective control mirror, a first or a second glass slide mirror, a converging lens and a laser receiving sensor for actively detecting a receiving light path; the reflecting mirror, the main-inverse/perspective control mirror, the first glass slide mirror, the first total reflecting mirror, the converging lens and the thermal infrared sensor of the elevation angle control unit form a first passive detection receiving light path; the reflecting mirror, the main-reflecting/perspective controlling mirror, the second glass mirror, the second total reflecting mirror, the converging lens and the visible light sensor of the elevation angle controlling unit form a second passive detection receiving light path; the reflecting mirror, the main-inverse/transparent control mirror, the first glass mirror, the converging lens and the ultraviolet light sensor of the elevation angle control unit form a third passive detection receiving light path. (it should be noted that, the three passive detection receiving optical paths may be increased or decreased according to actual needs or replaced by other types of sensors to form a passive detection optical path).
Preferably, in the above technical solution, the working wavelength setting range of the laser is 900 nm-1600 nm, and the working wavelength setting range of the ultraviolet light detection unit is 220 nm-400 nm; the wavelength range of the visible light detection unit is 400 nm-750 nm; the working wavelength of the infrared light detection unit is set to be 2000 nm-10000 nm.
Preferably, in the above technical solution, the working wavelength of the laser is preferably 905nm or 1550nm.
Preferably, in the above technical solution, the band splitter or the optical band filter is preferably a dichroic mirror capable of splitting the light beam according to the wavelength of the light beam, and the dichroic mirror is either a short-wavelength pass, a bit-length pass, or a multi-wavelength pass.
When the dichroic mirror or the filter is in a long-wavelength mode, the dichroic mirror or the filter is highly transparent to light higher than the initial wavelength, which is set to 800nm, and highly reflective to light lower than the initial wavelength.
The glass mirror-1 is preferably a beam splitter, and the wavelength of the light beam corresponding to the reflection surface is set to be 905nm or 1550nm as the operating wavelength of the laser source. The glass slide mirror-2 is preferably a beam splitter, and the wavelength of the ultraviolet light beam corresponding to the reflecting surface is set to be 220-280nm.
Preferably, in the above technical solution, when the dichroic mirror or the filter is in short-wavelength, the dichroic mirror or the filter has high transmittance for light below the initial wavelength and high reflectance for light above the initial wavelength, and preferably the initial wavelength is set to 800nm.
The glass mirror-1 is preferably a beam splitter, and the wavelength of the light beam corresponding to the reflection surface is set to be the operating wavelength of the laser source, preferably 905nm or 1550nm. The glass slide mirror-2 is preferably a beam splitter, and the wavelength of the ultraviolet light beam corresponding to the reflection surface is set to be 220-280nm.
The initial wavelength of the wave band beam splitter is 800nm, light in an ultraviolet wave band and light in a visible wave band can be separated from detection laser and infrared light, and each separated light path has almost equal detection unit distribution, so that the system setting can be simplified, the use of the wave band beam splitter or wave band filter can be reduced, and the cost is reduced.
Preferably, in the above technical solution, when the dichroic mirror or the filter mirror is multi-wavelength, the dichroic mirror or the filter mirror has high reflection for light lower than the start wavelength and high reflection for light higher than the cut-off wavelength, and the light between the dichroic mirror or the filter mirror has high transmission, and the start wavelength is preferably set to 400nm and the cut-off wavelength is preferably set to 2000nm.
The glass mirror-1 is preferably a beam splitter, and the wavelength of the light beam corresponding to the reflecting surface is set to be the operating wavelength of the laser source, preferably 905nm or 1550nm. The glass slide mirror-2 is preferably a beam splitter, and the wavelength of the ultraviolet light beam corresponding to the reflection surface is set to be 220-280nm.
The preferred initial wavelength of the band beam splitter is 400nm, the cut-off wavelength is 2000nm, the ultraviolet band light, the infrared light and the visible band light are separated from the detection laser by utilizing the characteristic of multi-wavelength, and each separated light path has almost equal detection unit distribution, so that the system setting can be simplified, the use of the band beam splitter or the band filter is reduced, and the cost is reduced.
Preferably, in the above technical scheme, the laser is a pulse type detection laser, the pulse type detection laser is in communication connection with a pulse generation unit (the control unit controls the pulse generation unit to send control pulses to control the laser to work, the laser sends pulse type laser pulses), the thermal infrared sensor, the visible light sensor, the ultraviolet light sensor and the laser receiving sensor are in communication connection with corresponding signal processing units, signals of the signal processing units are summarized to the control unit, and the result of the control unit is displayed through the display unit.
Preferably, in the above technical solution, a rotation sensor for detecting a rotation angle and a position of the motor or a coaxial gear coaxially arranged with the rotating seat is arranged on the shaft of the rotating motor to drive the rotation sensor, preferably the shaft encoder, and the rotation sensor detects a circumferential azimuth angle corresponding to the rotating seat.
An angle sensor, preferably an axial encoder, for detecting the pitch angle of the mirror is provided on the pitch angle motor rotation shaft of the pitch angle control unit, and detects the pitch angle orientation of the mirror.
A scanning angle sensor, preferably an axial encoder, for detecting the scanning angle of the reflecting mirror is arranged on the scanning motor rotating shaft of the pitch angle control unit;
The signals of the rotation sensor for detecting the circumferential azimuth of the rotating seat, the angle sensor for detecting the pitch angle azimuth of the reflecting mirror and the scanning angle sensor for detecting the scanning angle azimuth of the reflecting mirror are summarized to the control unit, the control unit forms a dot matrix according to the country and the azimuth of each laser reflection pulse, the dot states of a plurality of dot matrixes are compared and analyzed, and the result is displayed through the display unit.
The detection method of the detection device for converging various light sources comprises the steps of enabling control pulses (generated according to requirements) generated by a pulse generation unit to actively detect echo pulses of laser beams and at least two groups of passively detected echo pulse signals to enter a control unit after passing through respective processing units, and carrying out the following regular operation:
(1) the control pulse generating unit sends out control pulses with the quantity corresponding to the detection frequency in one scanning period according to the detection instruction, and the control pulses are composed of a series of high-level effective sections and low-level ineffective sections.
The control pulse controls the laser to emit laser beams which are actively detected, the laser beams correspond to the control pulse, the laser beams are formed to be 'on' and 'off', and meanwhile, the rotating seat and the pitch angle control unit drive the scanning beams to form spots distributed in a spot shape at the detected object. At this time, laser reflected by the detected object forms a laser echo pulse signal which is detected by the laser sensor, and an active detection echo pulse sequence is formed after the AND operation processing is carried out by the processing unit;
Meanwhile, the processing unit of the passive detection optical sensor performs AND operation processing on the obtained signals under the coordination of the control pulse, so as to obtain at least two groups of passive detection echo pulse sequences;
(2) the control unit further performs further comparison operation on the active detection echo pulse sequence and the passive detection echo pulse sequence according to the phases of the control pulses, and performs and operation on a plurality of signal pulses of the active detection echo pulse sequence and the passive detection echo pulse sequence:
only the pulse of one echo pulse sequence is high signal, and the interference is judged.
The pulses of the at least two echo pulse sequences are high signals and are judged to be highly focused targets.
The pulses of the at least three echo pulse sequences are high signals and are judged to be suspected targets.
The pulses of the four echo pulse sequences are high signals, and the determination target is judged.
Compared with the prior art, the invention has the following beneficial effects:
the synchronous work of a plurality of detection sources with the rotation angle and the pitching angle can be arranged, so that mutual calibration is realized, the detection precision is improved, and the sensitivity of the detection of the stealth target is increased.
The plurality of detection sources are fixedly arranged, and only the pitching angle control unit participates in rotation, so that the structure is simple and reliable.
The precise detection unit is required to be fixedly arranged and can be mutually independent with the rotation unit, sealing isolation can be arranged, the influence of external environment and dust on the precise detection unit is reduced, the maintenance workload is reduced, and the reliability is improved.
For visible light or infrared light, at least two detection units are arranged, parallel and simultaneous operation is realized, the same detected object is detected simultaneously by utilizing different wavelengths, the detection units are strictly in phase, mutual calibration among the different wavelength units is realized, and the detection precision is improved.
By utilizing the difference of transmission distances of light with different wavelengths in an air environment, the device is provided with multi-wavelength detection, so that the device can integrate early warning detection and positioning detection, the detection distance can be increased, the early warning time can be prolonged, and the target can be positioned and tracked.
The sensor with specific wavelength is used for forming the reflection point cloud to replace an optical detection visual device, so that the speed and the accuracy of detection and signal processing are improved, the cost is reduced, the large-scale production and manufacturing are easier, meanwhile, the optical characteristics of the whole detected object are converged by using an optical lens, the signal intensity is increased, and the anti-interference energy is improved.
The reflection/transmission control lens is a beam splitter or a filter lens manufactured by utilizing the conventional beam combination or separation technology of long beams with different wave bands, has mature technology and can accurately set the starting or cut-off value of the wavelength.
The optical sensor can not only comprise a light intensity sensor for realizing a point cloud matrix, but also can realize video images formed by a CCD imaging camera, and the two can realize detection in a completely synchronous, coaxial and same-direction mode, namely, one detection synchronous pulse can obtain result data of a plurality of detection sources, and the comparison processing is directly carried out to obtain an accurate detection result without secondary comparison and integration of background data.
The device can meet the requirements of multiple application scenes, can realize empty scanning and detection when being placed on a platform, and can realize empty and ground scanning detection when being placed below an aircraft.
It should be noted that: the terms "upper", "lower", "x-axis", "y-axis" and the like are used herein for convenience in describing the understanding of the present disclosure by the public in conjunction with the drawings of the specification, and these terms should be adapted according to the actual installation state when the device is in different installation orientations, for example, upside-down after lifting, for example, inclination angle correction after oblique installation, which are all contemplated as being adapted for installation in the present disclosure.
Drawings
Fig. 1: schematic diagram of structure principle of an embodiment case;
fig. 2a: another embodiment is a schematic structural diagram;
fig. 2b: another embodiment is a schematic structural diagram;
fig. 3: a schematic of wavelength setting for one case when the main-control mirror is a long pass;
fig. 4: the main-control mirror is a schematic wavelength setting of a case when short-wave communication is performed;
fig. 5: a wavelength setting schematic diagram of one case when the main-control mirror is multi-pass;
fig. 6: a control principle schematic diagram;
fig. 7: actively detecting echo signals to form a schematic diagram;
fig. 8: the passive detection signals form a schematic diagram;
fig. 9: determining a target principle schematic diagram;
fig. 10: passively detecting to form a schematic diagram of a target azimuth lattice cloud;
fig. 11: actively detecting a schematic diagram of forming a target azimuth lattice cloud;
fig. 12: schematic diagram of target lattice cloud after active and passive detection processing.
Description of the embodiments
The following detailed description of specific embodiments of the invention is, but it should be understood that the invention is not limited to specific embodiments.
Throughout the specification and claims, unless explicitly stated otherwise, the term "comprise" or variations thereof such as "comprises" or "comprising", etc. will be understood to include the stated element or component without excluding other elements or components.
Example 1
The detection device for converging various light sources is shown in fig. 1, and comprises a rotating seat rotating around a central shaft, wherein the center of the rotating seat is provided with a central hole for a detection source signal to pass through, a pitching angle control unit is arranged on the rotating seat, and the end face of the pitching angle control unit is provided with a reflecting mirror; a second glass slide mirror is arranged on one side of the transmission surface of the main-reflection/transmission control mirror, a second total reflection mirror is arranged on one side of the transmission surface of the second glass slide mirror, a converging lens and an ultraviolet light sensor are arranged on one side of the reflection surface of the second glass slide mirror, and a converging lens and a visible light sensor are arranged on one side of the reflection surface of the second total reflection mirror;
the main-reflection/transmission control mirror, the second glass slide mirror and the second total reflection mirror are respectively provided with a light transmission hole which is axially communicated with the center hole of the rotating base; the back of the second total reflecting mirror is provided with a laser, and laser emitted by the laser sequentially passes through the second total reflecting mirror, the second glass slide mirror, the main-inverse/transparent control mirror, the rotating seat and the reflecting mirror to be projected onto an object to be detected.
The main-inverse/transmission control mirror is an optical band beam splitter or a band filter that can split the light beam according to the wavelength band of the light beam.
The laser, the light-passing hole of the second glass slide mirror, the light-passing hole of the second total reflecting mirror, the coaxial center hole of the rotating seat and the reflecting mirror of the pitching angle control unit form an actively detected transmitting light path; a reflecting mirror, a main-inverse/perspective control mirror, a first glass slide mirror, a converging lens and a laser receiving sensor of the elevation angle control unit actively detect a receiving light path; the reflecting mirror, the main-inverse/perspective control mirror, the first glass slide mirror, the first total reflecting mirror, the converging lens and the thermal infrared sensor of the elevation angle control unit form a first passive detection receiving light path; the reflecting mirror, the main-reflecting/perspective controlling mirror, the second glass mirror, the second total reflecting mirror, the converging lens and the visible light sensor of the elevation angle controlling unit form a second passive detection receiving light path; the reflecting mirror, the main-inverse/transparent control mirror, the first glass mirror, the converging lens and the ultraviolet light sensor of the elevation angle control unit form a third passive detection receiving light path.
As shown in fig. 3, the working wavelength setting range of the laser is 900 nm-1600 nm, and the working wavelength setting range of the ultraviolet light detection unit is 220-nm-400 nm; the wavelength range of the visible light detection unit is 400 nm-750 nm; the working wavelength of the infrared light detection unit is set to be 2000 nm-10000 nm.
The laser operating wavelength is preferably 905nm or 1550nm.
The wave band beam splitter or the optical wave band filter is preferably a dichroic mirror capable of separating the light beam according to the wavelength of the light beam, wherein the dichroic mirror is either short-wave pass, bit-length wave pass or multi-wave pass;
when the dichroic mirror or the filter is a long-wavelength-pass mirror, the dichroic mirror or the filter has high transmittance for light higher than the initial wavelength and high reflectance for light lower than the initial wavelength, and the initial wavelength is preferably set to 800nm;
the first glass slide mirror is preferably a beam splitter mirror, and the wavelength of the light beam corresponding to the reflecting surface is set to be the working wavelength of the laser source, preferably 905nm or 1550nm; the glass slide mirror-2 is preferably a beam splitter, and the wavelength of the ultraviolet light beam corresponding to the reflecting surface is set to be 220-280nm.
As shown in fig. 4, when the dichroic mirror or the filter is short-wavelength light, the light having a wavelength lower than the initial wavelength is highly transmitted, and the light having a wavelength higher than the initial wavelength is highly reflected, and the initial wavelength is preferably set to 800nm;
the first glass slide mirror is preferably a beam splitter mirror, and the wavelength of the light beam corresponding to the reflecting surface is set to be the working wavelength of the laser source, preferably 905nm or 1550nm; the second glass slide mirror is preferably a beam splitter, and the wavelength of the ultraviolet light beam corresponding to the reflecting surface is set to be 220-280nm.
The initial wavelength of the wave band beam splitter is 800nm, light in an ultraviolet wave band and light in a visible wave band can be separated from detection laser and infrared light, and each separated light path has almost equal detection unit distribution, so that the system setting can be simplified, the use of the wave band beam splitter or wave band filter can be reduced, and the cost is reduced.
As shown in fig. 5, when the dichroic mirror or the filter is multi-pass, light having a wavelength lower than the start wavelength is highly reflected, light having a wavelength higher than the cut-off wavelength is highly reflected, and light between the dichroic mirror or the filter is highly transmitted, and the start wavelength is preferably 400nm and the cut-off wavelength is preferably 2000nm.
The first glass mirror is preferably a beam splitter, and the wavelength of the light beam corresponding to the reflecting surface is set to be the operating wavelength of the laser source, preferably 905nm or 1550nm. The second glass slide mirror is preferably a beam splitter, and the wavelength of the ultraviolet light beam corresponding to the reflecting surface is set to be 220-280nm.
The preferred initial wavelength of the band beam splitter is 400nm, the cut-off wavelength is 2000nm, the ultraviolet band light, the infrared light and the visible band light are separated from the detection laser by utilizing the characteristic of multi-wavelength, and each separated light path has almost equal detection unit distribution, so that the system setting can be simplified, the use of the band beam splitter or the band filter is reduced, and the cost is reduced.
As shown in fig. 6, the laser is a pulse detection laser control principle, the pulse detection laser is in communication connection with a pulse generation unit (the control unit controls the pulse generation unit to send control pulses to control the laser to work, the laser sends pulse laser pulses), the thermal infrared sensor, the visible light sensor, the ultraviolet light sensor and the laser receiving sensor are in communication connection with corresponding signal processing units, signals of the signal processing units are summarized to the control unit, and the result of the control unit is displayed through a display unit.
The pulse generating unit generates control pulses, echo pulses of active detection laser beams and at least two groups of passively detected echo pulse signals according to requirements, the control pulses and the echo pulse signals enter the control unit after passing through the respective processing units, and the following regular operation is carried out: (the control pulse is generated by the generation unit according to the need, the echo pulse of the active detection laser beam is the control pulse, so that the laser emits the external echo signal after the detection pulse, but the echo pulse signal of the passive detection is valid only when the control pulse exists)
(1) The control pulse generating unit sends out control pulses with the quantity corresponding to the detection frequency in one scanning period according to the detection instruction, and the control pulses are composed of a series of high-level effective sections and low-level ineffective sections.
The control pulse controls the laser to emit laser beams which are actively detected, the laser beams correspond to the control pulse, the laser beams are formed to be 'on' and 'off', and meanwhile, the rotating seat and the pitch angle control unit drive the scanning beams to form spots distributed in a spot shape at the detected object. At this time, laser reflected by the detected object forms a laser echo pulse signal which is detected by the laser sensor, and an active detection echo pulse sequence is formed after the AND operation processing is carried out by the processing unit; please refer to fig. 7.
Meanwhile, the processing unit of the optical sensor for passive detection performs AND operation processing on the obtained signals under the coordination of the control pulse, so as to obtain at least two groups of passive detection echo pulse sequences; please refer to fig. 8.
(2) The control unit further performs further comparison operation on the active detection echo pulse sequence and the passive detection echo pulse sequence according to the phases of the control pulses, and performs and operation on a plurality of signal pulses of the active detection echo pulse sequence and the passive detection echo pulse sequence (refer to fig. 9):
only the pulse of one echo pulse sequence is high signal, and the interference is judged.
The pulses of the at least two echo pulse sequences are high signals and are judged to be highly focused targets.
The pulses of the at least three echo pulse sequences are high signals and are judged to be suspected targets.
The pulses of the four echo pulse sequences are high signals, and the determination target is judged.
Example 2
The detection device for converging various light sources is characterized in that a main-reflecting/transmitting control mirror which works in cooperation with the reflecting mirror is arranged below the central hole, a first glass slide mirror is arranged on one side of a reflecting surface of the main-reflecting/transmitting control mirror, a first total reflecting mirror is arranged on one side of a transmitting surface of the first glass slide mirror, a converging lens and an ultraviolet light sensor are arranged on one side of a reflecting surface of the first glass slide mirror, and a converging lens and a visible light sensor or a thermal infrared sensor are arranged on one side of an emergent light path of the first total reflecting mirror; a second glass slide mirror is arranged on one side of the transmission surface of the main-reflection/transmission control mirror, a second total reflection mirror is arranged on one side of the transmission surface of the second glass slide mirror, a converging lens and a laser receiving sensor are arranged on one side of the reflection surface of the second glass slide mirror, and a converging lens and a thermal infrared sensor or a visible light sensor are arranged on one side of the reflection surface of the second total reflection mirror;
The main-reflection/transmission control mirror, the second glass slide mirror and the second total reflection mirror of the laser receiving sensor are respectively provided with a light through hole which is axially communicated with the central hole of the rotating base; the back of the second total reflecting mirror is provided with a laser, and laser emitted by the laser sequentially passes through the second total reflecting mirror, the second glass slide mirror, the main-inverse/transparent control mirror, the rotating seat and the reflecting mirror to be projected onto an object to be detected.
The main-inverse/transmission control mirror is an optical band beam splitter or a band filter that can split the light beam according to the wavelength band of the light beam.
The laser, the light-passing hole of the second glass slide mirror, the light-passing hole of the second total reflecting mirror, the coaxial center hole of the rotating seat and the reflecting mirror of the pitching angle control unit form an actively detected transmitting light path; a reflecting mirror, a main-inverse/perspective control mirror, a second glass slide mirror, a converging lens and a laser receiving sensor of the elevation angle control unit actively detect a receiving light path; the reflecting mirror, the main-inverse/perspective control mirror, the first glass slide mirror, the first total reflecting mirror, the converging lens and the thermal infrared sensor of the elevation angle control unit form a first passive detection receiving light path; the reflecting mirror, the main-reflecting/perspective controlling mirror, the second glass mirror, the second total reflecting mirror, the converging lens and the visible light sensor of the elevation angle controlling unit form a second passive detection receiving light path; the reflecting mirror, the main-inverse/transparent control mirror, the first glass mirror, the converging lens and the ultraviolet light sensor of the elevation angle control unit form a third passive detection receiving light path.
As shown in fig. 3, the working wavelength setting range of the laser is 900 nm-1600 nm, and the working wavelength setting range of the ultraviolet light detection unit is 220-nm-400 nm; the wavelength range of the visible light detection unit is 400 nm-750 nm; the working wavelength of the infrared light detection unit is set to be 2000 nm-10000 nm.
The laser operating wavelength is preferably 905nm or 1550nm.
The wave band beam splitter or the optical wave band filter is preferably a dichroic mirror capable of separating the light beam according to the wavelength of the light beam, wherein the dichroic mirror is either short-wave pass, bit-length wave pass or multi-wave pass;
when the dichroic mirror or the filter is a long-wavelength-pass mirror, the dichroic mirror or the filter has high transmittance for light higher than the initial wavelength and high reflectance for light lower than the initial wavelength, and the initial wavelength is preferably set to 800nm;
the first glass slide mirror is preferably a beam splitter mirror, and the wavelength of the light beam corresponding to the reflecting surface is set to be the working wavelength of the laser source, preferably 905nm or 1550nm; the glass slide mirror-2 is preferably a beam splitter, and the wavelength of the ultraviolet light beam corresponding to the reflecting surface is set to be 220-280nm.
As shown in fig. 4, when the dichroic mirror or the filter is short-wavelength light, the light having a wavelength lower than the initial wavelength is highly transmitted, and the light having a wavelength higher than the initial wavelength is highly reflected, and the initial wavelength is preferably set to 800nm;
The first glass slide mirror is preferably a beam splitter mirror, and the wavelength of the light beam corresponding to the reflecting surface is set to be the working wavelength of the laser source, preferably 905nm or 1550nm; the second glass slide mirror is preferably a beam splitter, and the wavelength of the ultraviolet light beam corresponding to the reflecting surface is set to be 220-280nm.
The initial wavelength of the wave band beam splitter is 800nm, light in an ultraviolet wave band and light in a visible wave band can be separated from detection laser and infrared light, and each separated light path has almost equal detection unit distribution, so that the system setting can be simplified, the use of the wave band beam splitter or wave band filter can be reduced, and the cost is reduced.
As shown in fig. 5, when the dichroic mirror or the filter is multi-pass, light having a wavelength lower than the start wavelength is highly reflected, light having a wavelength higher than the cut-off wavelength is highly reflected, and light between the dichroic mirror or the filter is highly transmitted, and the start wavelength is preferably 400nm and the cut-off wavelength is preferably 2000nm.
The first glass mirror is preferably a beam splitter, and the wavelength of the light beam corresponding to the reflecting surface is set to be the operating wavelength of the laser source, preferably 905nm or 1550nm. The second glass slide mirror is preferably a beam splitter, and the wavelength of the ultraviolet light beam corresponding to the reflecting surface is set to be 220-280nm.
The preferred initial wavelength of the band beam splitter is 400nm, the cut-off wavelength is 2000nm, the ultraviolet band light, the infrared light and the visible band light are separated from the detection laser by utilizing the characteristic of multi-wavelength, and each separated light path has almost equal detection unit distribution, so that the system setting can be simplified, the use of the band beam splitter or the band filter is reduced, and the cost is reduced.
As shown in fig. 6, the laser is a pulse detection laser control principle, the pulse detection laser is in communication connection with a pulse generation unit (the control unit controls the pulse generation unit to send control pulses to control the laser to work, the laser sends pulse laser pulses), the thermal infrared sensor, the visible light sensor, the ultraviolet light sensor and the laser receiving sensor are in communication connection with corresponding signal processing units, signals of the signal processing units are summarized to the control unit, and the result of the control unit is displayed through a display unit.
The pulse generating unit generates control pulses, echo pulses of active detection laser beams and at least two groups of passively detected echo pulse signals according to requirements, the control pulses and the echo pulse signals enter the control unit after passing through the respective processing units, and the following regular operation is carried out: (the control pulse is generated by the generation unit according to the need, the echo pulse of the active detection laser beam is the control pulse, so that the laser emits the external echo signal after the detection pulse, but the echo pulse signal of the passive detection is valid only when the control pulse exists)
(1) The control pulse generating unit sends out control pulses with the quantity corresponding to the detection frequency in one scanning period according to the detection instruction, and the control pulses are composed of a series of high-level effective sections and low-level ineffective sections.
The control pulse controls the laser to emit laser beams which are actively detected, the laser beams correspond to the control pulse, the laser beams are formed to be 'on' and 'off', and meanwhile, the rotating seat and the pitch angle control unit drive the scanning beams to form spots distributed in a spot shape at the detected object. At this time, laser reflected by the detected object forms a laser echo pulse signal which is detected by the laser sensor, and an active detection echo pulse sequence is formed after the AND operation processing is carried out by the processing unit; please refer to fig. 7.
Meanwhile, the processing unit of the optical sensor for passive detection performs AND operation processing on the obtained signals under the coordination of the control pulse, so as to obtain at least two groups of passive detection echo pulse sequences; please refer to fig. 8.
(2) The control unit further performs further comparison operation on the active detection echo pulse sequence and the passive detection echo pulse sequence according to the phases of the control pulses, and performs and operation on a plurality of signal pulses of the active detection echo pulse sequence and the passive detection echo pulse sequence (refer to fig. 9):
only the pulse of one echo pulse sequence is high signal, and the interference is judged.
The pulses of the at least two echo pulse sequences are high signals and are judged to be highly focused targets.
The pulses of the at least three echo pulse sequences are high signals and are judged to be suspected targets.
The pulses of the four echo pulse sequences are high signals, and the determination target is judged.
Fig. 10 shows a signal point cloud of a passive detector, and the passive detection is visible light or other ultraviolet and infrared light, which is a signal existing in nature, so that the passive detection can display more signals of suspected targets on the point cloud, so that the signals need to be verified by using other passive detection signals and also need to be verified by using signals of active detection.
Fig. 11 shows an active detection of the obtained target signal, i.e. using a laser light of a specific wavelength, by actively transmitting the laser light and then receiving the reflected signal of the object to the laser light, so that in general there is less interference and less target reflected signal is shown on the point cloud.
Fig. 12 shows a graph of a confirmed target signal obtained after comparing and verifying a passive detection signal with an active detection signal, which is almost the same as that shown by active detection, and the active detection signal will not fail unless in severe haze weather.
The foregoing descriptions of specific exemplary embodiments of the present invention are presented for purposes of illustration and description. It is not intended to limit the invention to the precise form disclosed, and obviously many modifications and variations are possible in light of the above teaching. The exemplary embodiments were chosen and described in order to explain the specific principles of the invention and its practical application to thereby enable one skilled in the art to make and utilize the invention in various exemplary embodiments and with various modifications as are suited to the particular use contemplated. It is intended that the scope of the invention be defined by the claims and their equivalents.
Claims (14)
1. The detection device for converging various light sources comprises a rotating seat rotating around a central shaft, wherein the center of the rotating seat is provided with a central hole for a detection source signal to pass through, the rotating seat is provided with a pitching angle control unit, and the end face of the pitching angle control unit is provided with a reflecting mirror; at least one path of second glass slide mirror is arranged on one side of the transmission surface of the main-reflection/transmission control mirror, a second total reflection mirror is arranged on one side of the transmission surface of the second glass slide mirror, a converging lens and an ultraviolet light sensor are arranged on one side of the reflection surface of the second glass slide mirror, and a converging lens and a visible light sensor are arranged on one side of the reflection surface of the second total reflection mirror;
The main-reflecting/transparent control mirror, the second glass slide mirror and the second total reflecting mirror are respectively provided with a light through hole which is axially communicated with the central hole of the rotating base; the back of the second total reflecting mirror is provided with a laser, and laser emitted by the laser sequentially passes through the second total reflecting mirror, the second glass slide mirror, the main-inverse/transparent control mirror, the rotating seat and the reflecting mirror to be projected onto an object to be detected.
2. The detection device for converging various light sources comprises a rotating seat rotating around a central shaft, wherein the center of the rotating seat is provided with a central hole for a detection source signal to pass through, the rotating seat is provided with a pitching angle control unit, and the end face of the pitching angle control unit is provided with a reflecting mirror; at least one path of second glass slide mirror is arranged on one side of the transmission surface of the main-reflection/transmission control mirror, a second total reflection mirror is arranged on one side of the transmission surface of the second glass slide mirror, a converging lens and a laser receiving sensor are arranged on one side of the reflection surface of the second glass slide mirror, and a converging lens and a thermal infrared sensor or a visible light sensor are arranged on one side of the reflection surface of the second total reflection mirror;
The main-reflection/transmission control mirror, the second glass slide mirror and the second total reflection mirror of the laser receiving sensor are respectively provided with a light through hole which is axially communicated with the central hole of the rotating base; the back of the second total reflecting mirror is provided with a laser, and laser emitted by the laser sequentially passes through the second total reflecting mirror, the second glass slide mirror, the main-inverse/transparent control mirror, the rotating seat and the reflecting mirror to be projected onto an object to be detected.
3. A detection apparatus for merging multiple light sources according to claim 1 or 2, characterized in that: the main-inverse/transmission control mirror is an optical band beam splitter or a band filter that can split the light beam according to the wavelength band of the light beam.
4. A detection apparatus for merging multiple light sources according to claim 1 or 2, characterized in that: the laser, the light-passing hole of the second glass slide mirror, the light-passing hole of the second total reflecting mirror, the coaxial center hole of the rotating seat and the reflecting mirror of the pitching angle control unit form an actively detected transmitting light path; a reflecting mirror of the elevation angle control unit, a main-inverse/perspective control mirror, a first or a second glass slide mirror, a converging lens and a laser receiving sensor for actively detecting a receiving light path; the reflecting mirror, the main-inverse/perspective control mirror, the first glass slide mirror, the first total reflecting mirror, the converging lens and the thermal infrared sensor of the elevation angle control unit form a first passive detection receiving light path; the reflecting mirror, the main-reflecting/perspective controlling mirror, the second glass mirror, the second total reflecting mirror, the converging lens and the visible light sensor of the elevation angle controlling unit form a second passive detection receiving light path; the reflecting mirror, the main-inverse/transparent control mirror, the first glass mirror, the converging lens and the ultraviolet light sensor of the elevation angle control unit form a third passive detection receiving light path.
5. A detection apparatus for merging multiple light sources according to claim 1 or 2, characterized in that: the working wavelength setting range of the laser is 900 nm-1600 nm, and the working wavelength setting range of the ultraviolet light detection unit is 220-nm-400 nm; the wavelength range of the visible light detection unit is 400 nm-750 nm; the working wavelength of the infrared light detection unit is set to be 2000 nm-10000 nm.
6. The detector for combining multiple light sources according to claim 4, wherein: the laser operating wavelength is preferably 905nm or 1550nm.
7. A detector for combining multiple light sources as defined in claim 3, wherein: the wave band beam splitter or the optical wave band filter is preferably a dichroic mirror capable of separating the light beam according to the wavelength of the light beam, and the dichroic mirror is either short-wave pass, bit-length wave pass or multi-wave pass;
when the dichroic mirror or the filter is in a long-wavelength mode, the dichroic mirror or the filter has high transmittance to light higher than the initial wavelength and high reflectance to light lower than the initial wavelength, and the initial wavelength is preferably set to be 800nm;
the first glass slide mirror is preferably a beam splitter, and the wavelength of the light beam corresponding to the reflecting surface is set to be the working wavelength of the laser source, preferably 905nm or 1550nm; the second glass slide mirror is preferably a beam splitter, and the wavelength of the ultraviolet light beam corresponding to the reflecting surface is set to be 220-280nm.
8. A detector for combining multiple light sources as defined in claim 3, wherein: when the dichroic mirror or the filter is short-wave communication, the dichroic mirror or the filter has high transmittance to light lower than the initial wavelength and high reflectance to light higher than the initial wavelength, and the initial wavelength is preferably set to 800nm;
the first glass slide mirror is preferably a beam splitter, and the wavelength of the light beam corresponding to the reflecting surface is set to be the working wavelength of the laser source, preferably 905nm or 1550nm; the second glass slide mirror is preferably a beam splitter, and the wavelength of the ultraviolet light beam corresponding to the reflecting surface is set to be 220-280nm.
9. A detector for combining multiple light sources as defined in claim 3, wherein: when the dichroic mirror or the filter mirror is multi-wavelength, the dichroic mirror or the filter mirror has high reflection on light lower than the initial wavelength and high reflection on light higher than the cut-off wavelength, and the light between the dichroic mirror or the filter mirror has high transmission, and the initial wavelength is preferably 400nm and the cut-off wavelength is preferably 2000nm;
the first glass mirror is preferably a beam splitter, and the wavelength of the light beam corresponding to the reflecting surface is set to be the working wavelength of the laser source, preferably 905nm or 1550nm. The second glass slide mirror is preferably a beam splitter, and the wavelength of the ultraviolet light beam corresponding to the reflecting surface is set to be 220-280nm.
10. A detection apparatus for merging multiple light sources according to claim 1 or 2, characterized in that: the laser is a pulse type detection laser, the pulse type detection laser is in communication connection with a pulse generation unit, a thermal infrared sensor, a visible light sensor, an ultraviolet light sensor and a laser receiving sensor are in communication connection with corresponding signal processing units, signals of the signal processing units are summarized to a control unit, and the result of the control unit is displayed through a display unit.
11. A detection method of a detection device that merges plural light sources as claimed in claim 1 or 2, characterized in that: the rotating sensor is arranged on the shaft of the rotating motor and used for detecting the rotating angle and the position of the motor, or a coaxial gear which is coaxially arranged with the rotating seat drives the rotating sensor, preferably the shaft encoder, and the rotating sensor is used for detecting the corresponding circumferential azimuth angle of the rotating seat.
12. An angle sensor, preferably an axial encoder, for detecting the pitch angle of the reflector is arranged on the pitch angle motor rotating shaft of the pitch angle control unit, and the angle sensor detects the pitch angle azimuth of the reflector.
13. A scanning angle sensor, preferably an axial encoder, for detecting the scanning angle of the reflecting mirror is arranged on the scanning motor rotating shaft of the pitch angle control unit;
the signals of the rotation sensor for detecting the circumferential azimuth of the rotating seat, the angle sensor for detecting the pitch angle azimuth of the reflecting mirror and the scanning angle sensor for detecting the scanning angle azimuth of the reflecting mirror are summarized to the control unit, the control unit forms a dot matrix according to the country and the azimuth of each laser reflection pulse, the dot states of a plurality of dot matrixes are compared and analyzed, and the result is displayed through the display unit.
14. The detection method of a detection device that merges plural light sources as claimed in claim 10, wherein: the pulse generating unit generates control pulses, echo pulses of active detection laser beams and at least two groups of passively detected echo pulse signals according to requirements, the control pulses and the echo pulse signals enter the control unit after passing through the respective processing units, and the following regular operation is carried out:
the control pulse generating unit sends out control pulses with the quantity corresponding to the detection frequency in a scanning period according to the detection instruction, wherein the control pulses consist of a series of high-level effective sections and low-level ineffective sections;
the control pulse controls the laser to emit a laser beam which is actively detected, the laser beam corresponds to the control pulse to form the existence and non-existence of the laser beam, and meanwhile, the rotating seat and the pitch angle control unit drive the scanning beam to form spots distributed in a spot shape at the detected object; at the moment, laser reflected by the detected object forms a laser echo pulse signal which is detected by the laser sensor, and the laser echo pulse signal and the processing unit perform AND operation processing to form an active detection echo pulse sequence;
simultaneously, the processing unit of the optical sensor for passive detection performs AND operation processing on the obtained signals under the coordination of the control pulse, so as to obtain at least two groups of passive detection echo pulse sequences;
The control unit further performs further comparison operation on the active detection echo pulse sequence and the passive detection echo pulse sequence according to the phases of the control pulses, and performs and operation on a plurality of signal pulses of the active detection echo pulse sequence and the passive detection echo pulse sequence:
only the pulse of one echo pulse sequence is high signal, and the interference is judged;
the pulses of at least two echo pulse sequences are high signals, and the high attention target is judged;
the pulses of the at least three echo pulse sequences are high signals, and the suspected targets are judged;
the pulses of the four echo pulse sequences are high signals, and the determination target is judged.
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