Smart Handheld Raman Spectrometer

Abstract

The present invention belongs to the technical field of optical analysis instruments, and aims to solve the problems of low focusing efficiency and low safety level of handheld Raman spectrometers in the prior art. Specifically, it relates to an intelligent handheld Raman spectrometer, including a Raman spectrometer body, a control module, a laser module, an optical path system, an adjustment module and a signal acquisition and processing module; the optical path system includes a dichroic mirror and a Raman focusing lens; a laser lens is provided at the end of the Raman spectrometer body; in a working state, the emitted light beam is reflected to the object to be measured through the optical path system and the laser lens, and the light beam received on the object to be measured and the Raman light generated by the object to be measured are collected to the signal acquisition and processing module through the optical path system; the control module obtains the optical path information of the optical path system in real time, so as to control the adjustment module to adjust the distance between the dichroic mirror and the Raman focusing lens in real time when the optical path information is abnormal. The present invention can automatically fine-tune the optical components, and effectively improve the accuracy, resolution and efficiency of detection.

Description

Technical Field

[0001] The invention belongs to the technical field of optical analysis instruments, and in particular relates to an intelligent handheld Raman spectrometer. Background Art

[0002] Raman is a light scattering technology. When a laser light source irradiates an object, its high-intensity incident light is scattered by molecules. Most of the scattered light has the same wavelength as the incident laser, and this scattering is called Rayleigh scattering. There is also a very small part of the scattered light whose wavelength is different from the incident light. The change in its wavelength is determined by the chemical structure of the test sample (the so-called scattering substance). This part of the scattered light is called Raman scattering. It is produced by the interaction between light and chemical bonds in the material, and can reflect the detailed information of the sample's chemical structure, phase and morphology, crystallinity, and molecular interactions. Therefore, Raman spectroscopy has the ability to serve as a "fingerprint" to identify substances, and can non-destructively analyze and identify substances. The Raman spectroscopy database contains thousands of spectra. By quickly searching and finding spectral data that matches the substance being analyzed, the substance being analyzed can be identified. Raman spectroscopy is mainly used for the identification of substances and the study of molecular structure, and can perform non-destructive qualitative and quantitative analysis of samples.

[0003] The handheld Raman spectrometer disclosed in the prior art adjusts the optical path through an adjustment mechanism, and the optical path adjustment is achieved by disassembly and assembly, and intelligent and convenient focusing cannot be achieved; in addition, for non-laboratory applications, in an environment with complex personnel flow, laser irradiation will cause harm to the human body. The prior art discloses that a laser safety lock device is provided to control the time when the laser transmitter emits the laser to avoid laser radiation and harm to surrounding personnel. However, when the laser transmitter emits the laser, if someone is facing the laser or the person accidentally opens the laser safety lock device, it will also inevitably cause damage to the human body. Summary of the invention

[0004] In order to solve the above problems, that is, to solve the problems of low focusing efficiency and low safety level of handheld Raman spectrometers in the prior art, the present invention provides an intelligent handheld Raman spectrometer, which includes a Raman spectrometer body, a control module, a laser module, an optical path system, an adjustment module and a signal acquisition and processing module, wherein the control module, the laser module, the optical path system, the adjustment module and the signal acquisition and processing module are all arranged inside the Raman spectrometer body;

[0005] The laser module, the optical path system, the adjustment module, and the signal acquisition and processing module are all signal-connected to the control module;

[0006] The optical path system includes a dichroic mirror and a Raman focusing lens, and the dichroic mirror and the Raman focusing lens are both connected to the adjustment module by signal;

[0007] A laser lens is provided at the end of the Raman spectrum body;

[0008] The laser module is configured to emit a light beam; in a working state, the emitted light beam is reflected onto the object to be measured through the optical path system and the laser lens, and the Raman light generated by the interaction between the light beam received on the object to be measured and the object to be measured is collected again by the optical path system to the signal acquisition and processing module; the control module obtains the light path information of the optical path system in real time, so as to control the adjustment module to adjust the distance between the dichroic mirror and the Raman focusing lens in real time when the light path information is abnormal.

[0009] In some preferred embodiments, a connector fixed to the Raman spectrometer body is provided at the bottom of the laser lens, a self-spinning external thread section is provided at one end of the connector, and a receiving chamber is provided at the other end, and a ball-stopping groove is provided on the inner circumference of the receiving chamber;

[0010] One end of the laser lens is arranged in the accommodating chamber, and a clamping ball matching the clamping ball limiting groove is arranged on the peripheral side of the laser lens; a sampling and focusing lens is built-in at the other end of the laser lens;

[0011] The end of the Raman spectrometer body is provided with a groove and a threaded hole matching the spin external thread segment, and the threaded hole is provided on one side of the groove;

[0012] When the laser lens is in working state, the self-spinning external thread segment is engaged with the threaded hole, the clamping ball is in a compressed state under the action of the clamping ball limiting groove, and the longitudinal axis of the laser lens is arranged to be consistent with the longitudinal axis of the Raman spectrometer body;

[0013] When the laser lens is in a non-working state, the locking ball pops out of the locking ball limiting groove, and the laser lens rotates and lies flat on the groove.

[0014] In some preferred embodiments, an opening and closing cover detachably mounted on the outside of the groove is further provided.

[0015] In some preferred embodiments, the signal acquisition and processing module includes a CCD sensor and a CCD processor, and the CCD processor is connected to the CCD sensor signal;

[0016] The CCD sensor is configured to convert the Raman light signal into an electrical signal and send it to the CCD processor;

[0017] The CCD processor is configured to process the electrical signal and transmit the processed electrical signal to the control module.

[0018] In some preferred embodiments, the optical path system also includes a first optical fiber, a second optical fiber, a sampling and focusing lens, a filter and a focusing lens. The laser emitted by the laser module is transmitted to the sampling and focusing lens via the first optical fiber and reaches the object to be measured; the Raman light generated by the reaction of the laser on the object to be measured and the chemical bond is transmitted to the second optical fiber through the sampling and focusing lens again, and then transmitted to the dichroic mirror via the filter and the focusing lens, and then acquired by the CCD sensor through the Raman focusing lens.

[0019] In some preferred embodiments, a human body proximity sensor is disposed inside the groove, and the human body proximity sensor is connected to the control module by signal;

[0020] The human body proximity sensor is configured to obtain human body information within a preset range in real time;

[0021] When the human body proximity sensor detects that there is human body information within a preset range, the control module controls the laser module to stop emitting laser.

[0022] In some preferred embodiments, a micro-printing module connected to the control module signal is disposed inside the Raman spectroscopy body;

[0023] The Raman spectrometer body is provided with a roll paper accommodating chamber, and an openable and closable printer cover is provided outside the roll paper accommodating chamber;

[0024] A paper outlet is also arranged on the outer side of the roll paper accommodating chamber, and the paper outlet is arranged adjacent to the printer upper cover.

[0025] In some preferred embodiments, the regulating module is a micro stepping motor.

[0026] In some preferred embodiments, the control module is further provided with a security authentication module;

[0027] The security authentication module is configured to determine whether the mobile terminal has access rights based on input information of the mobile terminal.

[0028] In some preferred embodiments, the control module has WIFI and / or Bluetooth wireless communication functions.

[0029] 1) The present invention proposes a Raman spectrometer with intelligent touch focus, low cost, compact size and safety protection. The spectrometer can effectively improve the monitoring efficiency of detection personnel, increase the safety of detection personnel themselves, and enable spectroscopy technology to develop in a more convenient and safe direction.

[0030] 2) The present invention can realize automatic fine adjustment of the focal length of the optical component, effectively improving the detection efficiency.

[0031] 3) The present invention can realize the protection of the laser lens of the Raman spectrometer, effectively protect the lens, and ensure high precision for repeated use.

[0032] 4) The present invention can effectively protect the human body or other organisms, effectively prevent the laser emitted by the laser device for detecting substances from burning the human body, and effectively protect the inspectors who are inexperienced or operate improperly. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] Other features, objects and advantages of the present application will become more apparent by reading the detailed description of non-limiting embodiments made with reference to the following drawings:

[0034] Figure 1 It is a three-dimensional structural schematic diagram of a specific embodiment of the present invention;

[0035] Figure 2 yes Figure 1 Schematic diagram of the back appearance;

[0036] Figure 3 is a partial schematic diagram of the groove in the present invention;

[0037] Figure 4 is a schematic diagram of the laser lens in the present invention;

[0038] Figure 5 is a half-section schematic diagram of the laser lens and the groove in the present invention;

[0039] Figure 6 It is a schematic diagram of the structural composition of the present invention;

[0040] Figure 7 It is a schematic diagram of the hardware framework of the present invention;

[0041] Figure 8 It is a schematic diagram of the software and hardware system of the present invention.

[0042] The description of the reference numerals is as follows:

[0043] 1. Capacitive screen; 2. Paper outlet; 3. Printer cover; 4. Laser lens; 5. On / off button; 6. Return function button; 7. Home page function button; 8. Menu function button; 9. LED light; 10. Rear camera; 11. Alarm loudspeaker; 12. Anti-slip mat; 13. Pendant hole; 14. Groove; 15. Sampling and focusing lens; 16. Card ball; 17. Self-spinning external thread segment; 18. Human proximity sensor. DETAILED DESCRIPTION

[0044] In order to make the embodiments, technical solutions and advantages of the present invention more obvious, the technical solutions of the present invention will be clearly and completely described below in conjunction with the accompanying drawings. Obviously, the embodiments described are part of the embodiments of the present invention, rather than all the embodiments. It should be understood by those skilled in the art that these implementation modes are only used to explain the technical principles of the present invention and are not intended to limit the scope of protection of the present invention.

[0045] The present invention discloses an intelligent handheld Raman spectrometer, which includes a Raman spectrometer body, a control module, a laser module, an optical path system, an adjustment module and a signal acquisition and processing module. The control module, the laser module, the optical path system, the adjustment module and the signal acquisition and processing module are all arranged inside the Raman spectrometer body; the laser module, the optical path system, the adjustment module and the signal acquisition and processing module are all connected to the control module signal. The optical path system includes a dichroic mirror and a Raman focusing lens, and the dichroic mirror and the Raman focusing lens are all connected to the adjustment module signal; a laser lens is arranged at the end of the Raman spectrometer body; the laser module is configured to emit a light beam; in a working state, the emitted light beam is reflected to the object to be measured through the optical path system and the laser lens, and the Raman light generated by the interaction between the light beam received on the object to be measured and the object to be measured is collected again to the signal acquisition and processing module through the optical path system; the control module obtains the light path information of the light path system in real time, so as to control the adjustment module to adjust the distance between the dichroic mirror and the Raman focusing lens in real time when the light path information is abnormal. The solution disclosed by the present invention can automatically fine-tune the optical components, and can effectively improve the accuracy and resolution of detection, as well as the detection efficiency of detection personnel.

[0046] The present invention is further described below in conjunction with specific embodiments with reference to the accompanying drawings.

[0047] Refer to the attached Figure 1 To Attachment Figure 8 The present invention discloses an intelligent handheld Raman spectrometer, which includes a Raman spectrometer body, a control module, a laser module, an optical path system, an adjustment module and a signal acquisition and processing module. The control module, the laser module, the optical path system, the adjustment module and the signal acquisition and processing module are all arranged inside the Raman spectrometer body; the laser module, the optical path system, the adjustment module and the signal acquisition and processing module are all connected to the control module by signal.

[0048] The optical path system includes a dichroic mirror and a Raman focusing lens, and both the dichroic mirror and the Raman focusing lens are connected to the adjustment module signal.

[0049] A laser lens 4 is arranged at the end of the Raman spectrum body; a connector fixed to the Raman spectrum body is arranged at the bottom of the laser lens, one end of the connector is arranged with a self-spinning external thread section 17, and the other end is arranged with a accommodating chamber, and a ball limiting groove is arranged on the inner circumference of the accommodating chamber; one end of the laser lens is arranged in the accommodating chamber, and a ball 16 matching the ball limiting groove is arranged on the circumference of the laser lens; a sampling and focusing lens 15 is built in at the other end of the laser lens; a groove 14 and a threaded hole matching the self-spinning external thread section are arranged at the end of the Raman spectrum body, and the threaded hole is arranged on one side of the groove.

[0050] When the laser lens is in a working state (i.e., a straight state), the self-spinning external thread section engages with the threaded hole, the card ball is in a compressed state under the action of the card ball limit groove, and the longitudinal axis of the laser lens is set consistently with the longitudinal axis of the Raman spectrum body; when the laser lens is in a non-working state, the card ball pops out of the card ball limit groove, and the laser lens rotates and lies flat in the groove.

[0051] The laser module is configured to emit a light beam.

[0052] In the working state, the emitted light beam is reflected to the object under test through the optical path system and the laser lens. The Raman light generated by the interaction between the light beam received on the object under test and the object under test is collected again by the optical path system to the signal acquisition and processing module. The control module obtains the optical path information of the optical path system in real time, so as to control the adjustment module to adjust the distance between the dichroic mirror and the Raman focusing lens in real time when the optical path information is abnormal.

[0053] The outside of the groove is also provided with an opening and closing cover that is detachable from the groove. After the laser lens is placed flat in the groove, it can be covered with the opening and closing cover to protect the sampling and focusing lens in the laser lens from being scratched or dusted, thus ensuring that the detection effect of the Raman spectrometer is not affected by the sampling and focusing lens. When the Raman spectrometer is needed, open the opening and closing cover, rotate the laser lens to one side until it is straight, press the card ball lightly with your hand to compress it, and rotate the laser lens counterclockwise until it cannot be rotated.

[0054] Specifically, the signal acquisition and processing module includes a CCD sensor and a CCD processor, and the CCD processor is connected to the CCD sensor signal; the CCD sensor is configured to convert the Raman light signal into an electrical signal and send it to the CCD processor; the CCD processor is configured to process the electrical signal and transmit the processed electrical signal to the control module.

[0055] Specifically, the optical path system also includes a first optical fiber, a second optical fiber, a sampling and focusing lens, a filter and a focusing lens. The laser emitted by the laser module is transmitted to the sampling and focusing lens through the first optical fiber and reaches the object to be measured; the Raman light generated by the reaction of the laser on the object to be measured with the chemical bond is transmitted to the second optical fiber through the sampling and focusing lens again, and then transmitted to the dichroic mirror through the filter and the focusing lens, and then acquired by the CCD sensor through the Raman focusing lens.

[0056] Furthermore, a human proximity sensor 18 is provided inside the groove, and the human proximity sensor is connected to the control module signal; the human proximity sensor is configured to obtain human information within a preset range in real time; when the human proximity sensor detects the presence of human information within the preset range, the control module controls the laser module to stop emitting laser; the laser lens will only be started to emit laser when no human information is detected, so as to irradiate the material for detection; this makes the detection process safer and effectively reduces the harm to the detection personnel.

[0057] Furthermore, a micro-printing module connected to the control module signal is arranged inside the Raman spectrometer body; a roll paper accommodating chamber is opened on the Raman spectrometer body, and an openable and closable printer cover 3 is arranged on the outside of the roll paper accommodating chamber; a paper outlet 2 is also arranged on the outside of the roll paper accommodating chamber, and the paper outlet is arranged adjacent to the printer cover.

[0058] Furthermore, a capacitive screen 1 is provided in front of the control module, and the capacitive screen is embedded in the lower front of the Raman spectrometer body. The capacitive screen has three auxiliary function buttons, namely: a return function button 6, a home page function button 7 and a menu function button 8. There is a switch button 5 on the left side of the Raman spectrometer body for controlling the power switch of the Raman spectrometer; a USB data interface is provided on the side opposite to the top of the Raman spectrometer body for charging the Raman spectrometer and interacting with computer data.

[0059] Furthermore, the signal acquisition and processing module is connected to the control module through a data line, and the control module is connected to the capacitive screen through a signal line. The signal calculated by the signal acquisition and processing module is filtered out of background noise again by the control module and displayed on the capacitive screen in the form of a waveform.

[0060] The control module is connected to the printer device (i.e., the micro-printing module) through a data line. The Raman spectrum waveform displayed on the capacitive screen can be saved as a picture file or printed by clicking the button next to it. The printer device starts printing after receiving the picture information and control instructions. The printed paper version of the waveform will be printed out from the paper outlet for intuitive viewing.

[0061] There is an LED light 9 on the back of the Raman spectrometer body for nighttime operation; a rear camera 10 is arranged on the right side of the LED light 9 and parallel to the LED light to meet specific photography needs; an alarm loudspeaker 11 with a warning function is arranged on the rear half of the back of the Raman spectrometer body, and when the detected substance is a harmful substance, the alarm loudspeaker can emit a warning sound; an anti-slip pad 12 is arranged under the loudspeaker to improve the anti-slip function of the Raman spectrometer; a pendant hole 13 is arranged at the bottom of the Raman spectrometer body for easy hanging and carrying.

[0062] Preferably, the regulating module is a micro stepping motor.

[0063] Furthermore, the control module is also provided with a security authentication module; the security authentication module is configured to determine whether the mobile terminal has access rights based on input information of the mobile terminal.

[0064] Specifically, the control module can be equipped with an Android system on a mobile phone. The Android system has a file management system. In addition to storing the Raman spectral data collected by itself, the data shared with other devices (mobile phones or similar devices) can also be stored.

[0065] Preferably, the control module has WIFI and / or Bluetooth wireless communication functions.

[0066] Furthermore, the charging methods of the intelligent handheld Raman spectrometer are divided into USB charging and wireless charging; it can be charged through an ordinary USB cable, while wireless charging is designed based on the principle of electromagnetic induction and requires the use of a special charging base; the charging base has a built-in power transmission coil, and the Raman spectrometer has a built-in power receiving coil. When a certain frequency of alternating current is passed into the power transmission coil, the magnetic field of the alternating current causes the power receiving coil to generate an induced current, thereby wirelessly supplying power to the Raman spectrometer.

[0067] The USB port at the bottom of the Raman spectrometer is connected to a computer to read the files of the Raman spectrometer and also has a charging function.

[0068] Furthermore, the laser module and the C signal acquisition and processing module are both equipped with cooling sheets.

[0069] It should be noted that in the description of the present invention, the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer" and the like indicating directions or positional relationships are based on the directions or positional relationships shown in the drawings, which are only for the convenience of description, and do not indicate or imply that the device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0070] In addition, it should be noted that in the description of the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For those skilled in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0071] The term "comprise" or any other similar term is intended to cover a non-exclusive inclusion, such that a process, article, or apparatus / device that includes a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, article, or apparatus / device.

[0072] So far, the technical solutions of the present invention have been described in conjunction with the preferred embodiments shown in the accompanying drawings. However, it is easy for those skilled in the art to understand that the protection scope of the present invention is obviously not limited to these specific embodiments. Without departing from the principle of the present invention, those skilled in the art can make equivalent changes or substitutions to the relevant technical features, and the technical solutions after these changes or substitutions will fall within the protection scope of the present invention.

Claims

1. An intelligent handheld Raman spectrometer, characterized in that: The intelligent handheld Raman spectrometer comprises a Raman spectrometer body, a control module, a laser module, an optical path system, an adjustment module and a signal acquisition and processing module, wherein the control module, the laser module, the optical path system, the adjustment module and the signal acquisition and processing module are all arranged inside the Raman spectrometer body; The laser module, the optical path system, the adjustment module, and the signal acquisition and processing module are all connected to the control module by signal; The optical path system includes a dichroic mirror and a Raman focusing lens, and the dichroic mirror and the Raman focusing lens are both connected to the adjustment module by signal; A laser lens is provided at the end of the Raman spectrum body; The laser module is configured to emit a light beam; in a working state, the emitted light beam is reflected to the object under test through the optical path system and the laser lens, and the Raman light generated by the interaction between the light beam received on the object under test and the object under test is collected again by the optical path system to the signal acquisition and processing module; The control module acquires the optical path information of the optical path system in real time, so as to control the adjustment module to adjust the distance between the dichroic mirror and the Raman focusing lens in real time when the optical path information is abnormal; a connector fixed to the Raman spectrum body is provided at the bottom of the laser lens, one end of the connector is provided with a self-spinning external thread section, and the other end is provided with a accommodating chamber, and a ball-locking limit groove is provided on the inner circumference of the accommodating chamber; One end of the laser lens is arranged in the accommodating chamber, and a clamping ball matching the clamping ball limiting groove is arranged on the peripheral side of the laser lens; a sampling and focusing lens is built-in at the other end of the laser lens; The end of the Raman spectrometer body is provided with a groove and a threaded hole matching the spin external thread segment, and the threaded hole is provided on one side of the groove; When the laser lens is in working state, the self-spinning external thread segment is engaged with the threaded hole, the clamping ball is in a compressed state under the action of the clamping ball limiting groove, and the longitudinal axis of the laser lens is arranged to be consistent with the longitudinal axis of the Raman spectrometer body; When the laser lens is in a non-working state, the locking ball pops out of the locking ball limiting groove, and the laser lens rotates and lies flat on the groove; the adjustment module is a micro stepping motor.

2. The intelligent handheld Raman spectrometer according to claim 1, characterized in that: The outside of the groove is also provided with an opening and closing cover which is detachably arranged with the groove.

3. The intelligent handheld Raman spectrometer according to claim 1, characterized in that: The signal acquisition and processing module includes a CCD sensor and a CCD processor, and the CCD processor is connected to the CCD sensor signal; The CCD sensor is configured to convert the Raman light signal into an electrical signal and send it to the CCD processor; The CCD processor is configured to process the electrical signal and transmit the processed electrical signal to the control module.

4. The intelligent handheld Raman spectrometer according to claim 3, characterized in that: The optical path system also includes a first optical fiber, a second optical fiber, a sampling and focusing lens, a filter and a focusing lens. The laser emitted by the laser module is transmitted to the sampling and focusing lens through the first optical fiber and reaches the object to be measured; the Raman light generated by the reaction of the laser on the object to be measured and the chemical bond is transmitted to the second optical fiber through the sampling and focusing lens again, and then transmitted to the dichroic mirror through the filter and the focusing lens, and then acquired by the CCD sensor through the Raman focusing lens.

5. The intelligent handheld Raman spectrometer according to claim 2, characterized in that: A human body proximity sensor is arranged inside the groove, and the human body proximity sensor is connected to the control module by signal; The human body proximity sensor is configured to obtain human body information within a preset range in real time; When the human body proximity sensor detects that there is human body information within a preset range, the control module controls the laser module to stop emitting laser.

6. The intelligent handheld Raman spectrometer according to claim 1, characterized in that: The Raman spectrometer body is provided with a micro-printing module connected to the control module signal; The Raman spectrometer body is provided with a roll paper accommodating chamber, and an openable and closable printer cover is provided outside the roll paper accommodating chamber; A paper outlet is also arranged on the outer side of the roll paper accommodating chamber, and the paper outlet is arranged adjacent to the printer upper cover.

7. The intelligent handheld Raman spectrometer according to claim 1, characterized in that: The control module is also provided with a safety authentication module; The security authentication module is configured to determine whether the mobile terminal has access rights based on input information of the mobile terminal.

8. The intelligent handheld Raman spectrometer according to claim 7, characterized in that: The control module has WIFI and / or Bluetooth wireless communication functions.

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