Non-contact laser decontamination device and method

Abstract

The invention relates to the technical field of decontamination, in particular to a non-contact laser decontamination device and method. In order to solve the problem that a device suitable for decontaminating chemical toxicants and biological toxicants on metal coating surfaces or glass surfaces of electronic products, precise instruments and sensitive materials in modern military equipment is lacked in the prior art, the invention provides a novel non-contact laser decontaminating device. Comprising an acquisition control unit, a surface imaging unit, a power supply unit, a laser detection decontamination unit and a main control computer, the surface imaging unit comprises an industrial camera and a line structure laser scanner; the laser detection decontamination unit comprises a laser, a spectrograph, a beam expander, a half-wave plate, a polarization splitting prism, a shaping mirror, a zoom lens, a dichroscope, a galvanometer and a field lens; according to the device, the mechanical effect of laser-induced surface plasma shock waves and the interaction of chemical attachments are utilized, so that chemical molecules are subjected to thermal expansion, photodecomposition and phase change, and the decontamination effect is achieved.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of decontamination technology, in particular to a non-contact laser decontamination device and method. BACKGROUND

[0002] Traditional "wet" decontamination uses decontamination agents, although the technology is relatively mature, but it needs to use a large amount of chemicals, which is easy to cause secondary pollution. The photochemical technology based on laser has shown good application prospects in the treatment of waste gas, waste water, solid waste and the cleaning of object surface bacteria and rust, but there are still many deficiencies in the decontamination of chemical and biological toxic agents contaminated on the metal coating surface or glass surface of electronic products, precision instruments and sensitive materials in modern military equipment. SUMMARY

[0003] In order to solve the problem that there is no device suitable for decontaminating chemical and biological toxic agents contaminated on the metal coating surface or glass surface of electronic products, precision instruments and sensitive materials in modern military equipment in the prior art, the present application provides a new non-contact laser decontamination device and method.

[0004] The present application is implemented by adopting the following technical scheme: A non-contact laser decontamination device, comprising a collection control unit, a surface imaging unit, a power supply unit, a laser detection and decontamination unit, and a host computer; The collection control unit is responsible for collecting biochemical pollutant samples from the object to be decontaminated; The surface imaging unit comprises an industrial camera and a line structure laser scanner, which realizes three-dimensional topographic imaging of the object to be decontaminated, generates a concentration distribution map of the biochemical substance, and provides necessary data support for the decontamination process; The power supply unit is used to provide stable power support for the whole device, and ensure the normal operation of each unit; The laser detection and decontamination unit comprises a laser and a spectrometer, the high-repetition-rate laser beam emitted by the laser is divided into two beams in turn through a beam expander, a half-wave plate and a polarization beam splitter prism, one beam is sent to a power meter to facilitate monitoring the laser output power through the power meter, and the other beam is irradiated on the object to be decontaminated in turn through a shaping mirror, a zoom lens, a dichroic mirror, a galvanometer and a field lens, and the spectrometer is used to collect the spectrum signal of plasma fluorescence; The host computer is the core of the whole device, which is responsible for coordinating the work of each unit and accurately controlling the decontamination process.

[0005] The high-energy-density laser focused by the focusing light path excites the surface of the decontamination object, thereby chemically decontaminating the surface to be decontaminated, and the plasma fluorescence formed by the high-energy-density laser focused by the focusing light path is transmitted to the spectrometer through the optical fiber for biochemical detection;The shaping mirror is used to shape the aurora water into a flat-top light beam, ensuring the same sterilization rate within the spot;The array mirror is used to change the laser exit angle to achieve rapid longitudinal line scanning;The scene is used to increase the incident flux and make the output laser uniform and focused.

[0006] Further, the acquisition control unit is also provided with a two-dimensional sliding table for placing the decontamination object. Due to the different specifications and qualities of the decontamination objects, the two-dimensional sliding table is needed to adjust the position of the decontamination object, so as to ensure that the acquisition quality of the sample meets the subsequent analysis requirements.

[0007] In addition, the host computer also supports real-time display of decontamination state, decontamination time and microorganism species information, thereby realizing intelligent decontamination management.

[0008] A non-contact laser decontamination method is realized by using the non-contact laser decontamination device described above, and includes the following steps: 1) the acquisition control unit acquires the biochemical pollutant sample from the decontamination object, and the sliding table is ready;2) the line structure laser scanner is started to perform 3D topography scanning, and the surface longitudinal line depth data is obtained;3) the laser is started to perform longitudinal line low spatial resolution LIBS scanning on the surface of the decontamination object, and the plasma spectrum of each point is obtained;4) in the spectrum analysis stage, the spectrum features are extracted, the microorganism species is judged, and the microorganism concentration on the surface of the decontamination object is quantitatively analyzed, and the longitudinal line concentration distribution graph along the coordinate is drawn;5) the laser detection decontamination unit is started, and the decontamination progress is judged in real time, if the longitudinal line is not cleaned, the decontamination is continued, if the longitudinal line is decontaminated, the sliding table is translated to the next longitudinal line, and the scanning and detection decontamination process is repeated until the whole decontamination is completed, and the decontamination is ended.

[0009] The beneficial effects of the present application are as follows: 1) the non-contact laser decontamination device of the present application utilizes the mechanical effect of laser-induced surface plasma shock wave and the interaction of chemical attachments, so that the chemical molecules are thermally expanded, photolyzed and phase changed, thereby achieving the decontamination effect without causing significant damage to the subsequent use and function of the contaminated object;2) the device avoids secondary pollution caused by the large use of chemicals;3) the device liberates manpower and avoids damage to the operating personnel;4) the present application can be used for decontamination of electronic products, precision instruments and sensitive materials in military equipment, and avoids irreversible damage to the equipment noise caused by traditional wet decontamination. BRIEF DESCRIPTION OF DRAWINGS

[0010] The accompanying drawings, which are incorporated herein and constitute part of the specification, illustrate embodiments consistent with the present application and, together with the description, further serve to explain the principles of the application.

[0011] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the accompanying drawings needed to be used in the embodiments or the prior art description will be briefly introduced. Obviously, for those skilled in the field, other drawings can also be obtained based on these drawings without any creative effort.

[0012] Figure 1 The overall structure schematic diagram of the device of the present application is shown in the figure. Figure 2 The optical path structure schematic diagram of the laser detection decontamination unit of the present application is shown in the figure. Figure 3 The flow chart of the decontamination method of the present application is shown in the figure. DETAILED DESCRIPTION

[0013] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the accompanying drawings needed to be used in the embodiments or the prior art description will be briefly introduced. Obviously, for those skilled in the field, other drawings can also be obtained based on these drawings without any creative effort.

[0014] In the description, it should be noted that the terms "first", "second" are only for the purpose of description, and cannot be understood as indicating or implying relative importance. It should be noted that, unless otherwise explicitly specified and limited, the terms "mounting", "connecting", "connecting" should be understood in a broad sense, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium, or it can be the communication inside two elements. For those skilled in the art, the specific meaning of the above terms can be understood according to the specific circumstances.

[0015] In the following description, many specific details are set forth in order to provide a thorough understanding of the present application, but the present application can also be implemented in other ways different from those described herein; obviously, the examples in the specification are only a part of the embodiments of the present application, not all the embodiments.

[0016] The specific embodiments of the present application will be described in detail below with reference to the accompanying drawings.

[0017] As shown in Figure 1 , 2 , 3, a non-contact laser decontamination device, comprising a collection control unit, a surface imaging unit, a power supply unit, a laser detection decontamination unit, a host computer; The collection control unit is responsible for collecting the biochemical pollutant sample from the object to be decontaminated; The surface imaging unit includes an industrial camera and a line structure laser scanner, which realizes three-dimensional topographic imaging of the object to be decontaminated, generates a concentration distribution map of the biochemical substance, and provides necessary data support for the decontamination process. The power supply unit is used to provide stable power support for the entire device to ensure the normal operation of each unit. The laser detection and decontamination unit includes a laser and a spectrometer. The high-repetition-rate laser beam emitted by the laser is divided into two beams after passing through the beam expander, the half-wave plate and the polarization beam splitter prism. One beam goes to the power meter to monitor the laser output power, and the other beam passes through the shaping mirror, the zoom lens, the dichroic mirror, the galvanometer and the field lens in sequence and then irradiates the object to be decontaminated. The spectrometer is used to collect the plasma fluorescence spectrum signal. The main control computer is the core of the entire device, responsible for coordinating the work of each unit and accurately controlling the decontamination process.

[0018] The high-energy-density laser focused by the focusing light path excites the surface of the object to be decontaminated, thereby chemically decontaminating the surface to be decontaminated. The plasma fluorescence formed by the high-energy-density laser focused by the focusing light path is transmitted to the spectrometer through the optical fiber for biochemical detection. The shaping mirror is used to shape the polar light into a flat-top beam to ensure the same sterilization rate within the spot. The array mirror is used to change the laser exit angle to realize fast longitudinal line scanning. The field lens is used to increase the incident flux and make the output laser uniform and focused.

[0019] In specific implementation, the collection control unit is also provided with a two-dimensional sliding table for placing the object to be decontaminated. Due to the different specifications and qualities of the object to be decontaminated, the two-dimensional sliding table is needed to adjust the position of the object to be decontaminated to ensure that the collection quality of the sample meets the subsequent analysis requirements.

[0020] In addition, the main control computer also supports real-time display of decontamination status, decontamination time and microorganism species information, thereby realizing intelligent decontamination management.

[0021] A non-contact laser decontamination method is realized by using the non-contact laser decontamination device as described above, and comprises the following steps: 1) the control unit collects the biochemical pollutant sample from the object to be decontaminated, and the sliding table is ready; 2) the linear structure laser scanner is started to perform 3D topography scanning, and the longitudinal line depth data of the surface is obtained; 3) the laser is started to perform longitudinal line low spatial resolution LIBS scanning on the surface of the object to be decontaminated, and the plasma spectrum of each point is obtained; 4) the spectral feature is extracted in the spectral analysis stage, the microbial species is judged, the microbial concentration on the surface of the object to be decontaminated is quantitatively analyzed, and the longitudinal line concentration distribution graph along the coordinate is drawn; 5) the laser detection and decontamination unit is started, and the decontamination progress is judged in real time; if the longitudinal line has not been cleaned, the decontamination is continued; if the longitudinal line has been decontaminated, the sliding table is translated to the next longitudinal line, and the scanning and decontamination process is repeated until the overall decontamination is completed, and the decontamination is ended.

[0022] The above is only a specific embodiment of the present application, which enables those skilled in the art to understand or implement the present application. Although the foregoing embodiments are described in detail, those skilled in the art should understand that the technical solutions recorded in the foregoing embodiments can be modified, or some or all of the technical features can be replaced by equivalents; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments, and they should be covered in the protection scope of the claims.

Claims

1. A non-contact laser decontamination device, characterized by, It comprises a collection control unit, a surface imaging unit, a power supply unit, a laser detection and decontamination unit, and a host computer. The collection control unit is responsible for collecting biochemical pollutant samples from the object to be decontaminated. The surface imaging unit comprises an industrial camera and a line structure laser scanner, which realizes three-dimensional topographic imaging of the object to be decontaminated and generates a concentration distribution map of the biochemical substance, providing necessary data support for the decontamination process. The power supply unit is used to provide stable power support for the entire device to ensure the normal operation of each unit. The laser detection and decontamination unit comprises a laser and a spectrometer. The high-repetition-rate laser beam emitted by the laser is divided into two beams after passing through a beam expander, a half-wave plate, and a polarization beam splitter prism. One beam goes to a power meter to monitor the laser output power, and the other beam passes through a shaping mirror, a zoom lens, a dichroic mirror, a galvanometer, and a field lens in sequence and then irradiates the object to be decontaminated. The spectrometer is used to collect the spectrum of plasma fluorescence. The host computer is the core of the entire device, responsible for coordinating the work of each unit and accurately controlling the decontamination process.

2. A non-contact laser decontamination device according to claim 1, wherein, The collection control unit is also equipped with a two-dimensional sliding table for placing the object to be decontaminated.

3. A non-contact laser decontamination method, characterized by, The non-contact laser decontamination device according to claim 1 or 2 is implemented by the following steps: 1) the collection control unit collects biochemical pollutant samples from the object to be decontaminated, and the sliding table is ready; 2) the line structure laser scanner is turned on for 3D topographic scanning to obtain surface longitudinal line depth data; 3) the laser is turned on to perform longitudinal line low spatial resolution LIBS scanning on the surface of the object to be decontaminated to obtain plasma spectra at each point; 4) in the spectrum analysis stage, spectral features are extracted, microbial species are judged, and the concentration of microorganisms on the surface of the object to be decontaminated is quantitatively analyzed, and a longitudinal line concentration distribution map along the coordinate is drawn; 5) the laser detection and decontamination unit is turned on, and the decontamination progress is judged in real time. If the longitudinal line has not been cleaned up, the decontamination continues. If the longitudinal line has been decontaminated, the sliding table is translated to the next longitudinal line, and the scanning and decontamination process is repeated until the whole decontamination is completed, and the decontamination is ended.

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