CN218212649U

CN218212649U - Novel humidity detector

Info

Publication number: CN218212649U
Application number: CN202222050424.1U
Authority: CN
Inventors: 张兴龙; 刘玉柱
Original assignee: Nanjing University of Information Science and Technology
Current assignee: Nanjing Yiqiao Information Technology Co ltd
Priority date: 2022-08-04
Filing date: 2022-08-04
Publication date: 2023-01-03
Anticipated expiration: 2032-08-04

Abstract

The utility model relates to a novel moisture detector, which comprises a housin, the inside of casing is provided with gaseous sample storage assembly, the inside of casing is equipped with detection mechanism, detection mechanism is including fixing the pulse laser at the casing inside, the back inner wall of casing is equipped with first speculum, the left side of detecting the air chamber is fixed with first focusing lens, the inside of casing just is located and detects air chamber left side below and is fixed with the spectrometer, the right side of spectrometer is fixed with the optical fiber probe, the left side of spectrometer is fixed with the ICCD detector, the inside of casing is fixed with data processing and control singlechip, the inside of casing is provided with the reinspection subassembly. This neotype moisture detector compares in current humidity detection means, through hydrogen element intensity reaction humidity information, and laser-induced breakdown spectroscopy technique can realize real-time analysis, and measuring range is wide to can not become invalid at the high humidity scene, the precision is high, and response time is fast.

Description

Novel humidity detector

Technical Field

The utility model relates to a humidity detects technical field, specifically is a novel moisture detector.

Background

The Laser Induced Breakdown Spectroscopy (LIBS) technology is a novel substance component detection means, is a typical atomic emission spectrum, and utilizes superstrong laser pulses to focus on an analysis object to excite high-temperature plasmas, the formed plasmas continuously expand along with the reduction of temperature after the action of the laser pulses is finished, atoms and ions in an excited state undergo transition to a low-energy level or a ground state in the cooling process, photons with specific frequency are emitted at the same time, characteristic spectral lines are generated, the wavelength and the intensity distribution of the spectral lines can represent element information contained in the analysis object and the intensity of corresponding elements, and the qualitative and quantitative analysis of the elements contained in a sample is realized by analyzing the wavelength position and the intensity information of characteristic peaks corresponding to the elements in the spectral lines.

Humidity is used as an important physical quantity to have an important influence on life production, the probability that the humidity can directly reflect rainfall is provided for meteorology, meanwhile, overlarge humidity is very unfavorable for human health, and the humidity has very important significance for research of various subjects such as biology, agriculture, forestry and architecture, so that the humidity is especially important for humidity measurement; the conventional humidity detection methods include a stretching method, a dry and wet ball method, a dew point method, a resistance capacitance method and the like, but the methods have certain defects in the aspects of detection range, response time, sensitivity and the like, so that a novel humidity detector is provided to solve the problems.

SUMMERY OF THE UTILITY MODEL

The utility model provides a novel moisture detector, possess and realized advantages such as high accuracy humidity detects, it is limited to have solved current humidity detection means detection range, is close to the problem of inefficacy under the high humidity condition.

In order to achieve the above purpose, the utility model provides a following technical scheme: a novel humidity detector comprises a shell, wherein a gas sample storage assembly used for collecting and discharging gas samples is arranged inside the shell, and a detection mechanism used for detecting the humidity of the gas samples is arranged inside the shell;

the gas sample storage assembly comprises a detection gas chamber which is fixed in the shell and used for storing a gas sample, and the top and the bottom of the detection gas chamber are respectively provided with a first air pump used for pumping detection gas and a second air pump used for discharging the detection gas;

detection mechanism is including fixing the pulse laser who just is used for transmitting laser inside the casing, the back inner wall of casing is equipped with and is used for carrying out the first speculum that reflects to the laser of pulse laser transmission, the left side of detecting the air chamber is fixed with one end and runs through and extends to the inside first focusing lens that is used for receiving the laser after the first speculum reflection of detecting the air chamber, the inside of casing just is located and detects the air chamber left side below and is fixed with the spectrometer, the right side of spectrometer is fixed with the fiber optic probe who is used for carrying out the collection to the spectrum, the left side of spectrometer is fixed with the ICCD detector, the inside of casing is fixed with carries out the data processing and the control singlechip of analysis to the spectrum after gathering, the inside of casing is provided with the reinspection subassembly.

Furthermore, the rechecking assembly comprises a second reflector arranged inside the shell and positioned below the first reflector and used for reflecting laser emitted by the pulse laser, a rotating assembly used for driving the second reflector to rotate is further arranged between the shell and the second reflector, a dimming knob used for adjusting the angle of the second reflector is arranged inside the shell, a closed air chamber is fixed inside the shell and positioned below the left side of the data processing and control single chip microcomputer, one end of a second focusing lens penetrates through and extends to the inside of the closed air chamber and is used for receiving the laser reflected by the second reflector, a pressure sensor with one end penetrating through and extending to the bottom of the closed air chamber is fixed on the inner bottom wall of the closed air chamber, and an integrated spectrum signal collector with one end penetrating through and extending to the right side of the closed air chamber and electrically connected with the data processing and control single chip microcomputer is fixed on the inner wall of the right side of the closed air chamber.

Furthermore, a display and an external USB device are fixed inside the shell and at the bottom of the data processing and control single chip microcomputer, and a power supply electrically connected with the data processing and control single chip microcomputer is fixed inside the shell and at the right side of the external USB device.

Further, the dimming knob, the pulse laser, the ICCD detector, the display and the external USB device are all electrically connected with the control single chip microcomputer in a data processing way.

Compared with the prior art, the technical scheme of the application has the following beneficial effects:

1. this novel moisture detector compares in current humidity detection means, the utility model discloses a hydrogen element intensity reaction humidity information, laser induction puncture spectroscopy can realize real-time analysis, and measuring range is wide to can not become invalid at the high humidity scene, the precision is high, and response time is fast.

2. The utility model discloses a humidity detector, the utility model discloses external connection such as accessible USB connects the instrument, and the storage data carries out more deep research to humidity information, and simultaneously, built-in airtight air chamber can regularly inspect the instrument performance, has improved the stability of instrument.

Drawings

Fig. 1 is a schematic structural diagram of the present invention.

In the figure: the device comprises a shell 1, a first reflector 2, a pulse laser 3, a dimming knob 4, a second reflector 5, a second focusing lens 6, a closed air chamber 7, a pressure sensor 8, an integrated spectral signal collector 9, a data processing and control single chip microcomputer 10, a display 11, an external USB device, a power supply 12, a spectrometer 13, a first air pump 14, a detection air chamber 15, a second air pump 16, a fiber optic probe 17, a first focusing lens 18 and an ICCD detector 19.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

Referring to fig. 1, the novel humidity detector in this embodiment includes a housing 1, a gas sample storage assembly for collecting and discharging a gas sample is disposed inside the housing 1, the gas sample storage assembly includes a detection chamber 15 fixed inside the housing 1 for storing the gas sample, and a first air pump 14 for pumping a detection gas and a second air pump 16 for discharging the detection gas are disposed at the top and the bottom of the detection chamber 15, respectively.

Humidity all has important influence to human production life and biological activity etc. and the LIBS technique adopts high energy laser pulse to arouse high temperature plasma, and the wavelength and the intensity of the plasma emission line that obtains through the collection can realize qualitative and quantitative analysis to the element, consequently the utility model discloses a LIBS technique realizes the detection to humidity, and wherein, when gathering gas sample, the first aspiration pump 14 of accessible extracts gas sample to inside the discharge detection air chamber 15, second aspiration pump 16 can be used to discharge the gas after detecting 15 inside detections in gas chamber 15.

In this embodiment, the inside of casing 1 is equipped with the detection mechanism that detects in order to carry out the humidity to the gas sample, detection mechanism is including fixing at the inside pulse laser 3 that just is used for transmitting laser of casing 1, the back inner wall of casing 1 is equipped with the first speculum 2 that is used for carrying out the reflection to the laser that pulse laser 3 transmitted, the left side of detecting air chamber 15 is fixed with one end and runs through and extend to the inside first focusing lens 18 that is used for receiving laser after first speculum 2 reflects of detecting air chamber 15, the inside of casing 1 just is located and is fixed with spectrometer 13 below detecting air chamber 15 left side, spectrometer 13's right side is fixed with the fiber probe 17 that is used for gathering the spectrum, spectrometer 13's left side is fixed with the ICCD detector 19, casing 1's inside is fixed with carries out the data processing and the control singlechip 10 of analysis to the spectrum after gathering.

In addition, a display and an external USB device 11 are fixed inside the casing 1 and at the bottom of the data processing and control single chip microcomputer 10, a power supply 12 electrically connected with the data processing and control single chip microcomputer 10 is fixed inside the casing 1 and at the right side of the external USB device 11, and the dimming knob 4, the pulse laser 3, the ICCD detector 19, the display and the external USB device 11 are all electrically connected with the data processing and control single chip microcomputer 10.

After the collection of the gas sample is realized, when the gas sample is detected, a pulse laser beam can be generated by emitting Nd-YAG with the wavelength of 1064nm as a laser light source through a pulse laser 3, the laser beam is reflected by a first reflector 2, a first focusing lens 18 receives the laser reflected by the first reflector 2, the laser forms plasma in a detection gas chamber 15 after passing through the first focusing lens 18, an optical fiber probe 17 collects an emission spectrum of the plasma during cooling and transmits the emission spectrum to a spectrometer 13 to obtain an LIBS spectrum, and finally, an optical signal is converted into an electric signal through a photoelectric tube and transmitted to a digital processing and control single chip 10 to be analyzed to obtain humidity information.

In this embodiment, the inside of casing 1 is provided with the reinspection subassembly, the reinspection subassembly is including setting up at casing 1 inside and being located 2 below first speculum 2 and being used for carrying out the second speculum 5 that reflects to the laser of pulse laser instrument 3 transmission, still be provided with between casing 1 and the second speculum 5 and be used for driving second speculum 5 pivoted rotating assembly, rotating assembly can be for among the prior art through motor drive, the gear carries out driven subassembly, thereby make second speculum 5 rotate, the inside of casing 1 is equipped with and is used for carrying out the dimming knob 4 that adjusts to the angle of second speculum 5, the inside of casing 1 just is located data processing and control singlechip 10 left side below and is fixed with airtight air chamber 7, the interior roof of airtight air chamber 7 is fixed with one end and runs through and extends to airtight air chamber 7 inside and is used for receiving second focusing lens 6 of second speculum 5 reflection back laser, the interior diapire of airtight air chamber 7 is fixed with the integrated spectral intensity of pressure sensor 8 that one end runs through and extends to airtight air chamber 7 bottom, the right side inner wall of airtight air chamber 7 is fixed with one end and runs through and extends to airtight air chamber 7 right side and the integrated spectral signal collector 9 that is connected with data processing and control singlechip 10 electricity.

In order to ensure the accuracy of the detection result of the instrument and avoid errors of the instrument after long-time work, a built-in sealed air chamber 7 is added, a ventilation device is arranged on the sealed air chamber 7, the ventilation device is a device used for inflating and exhausting the sealed air chamber 7 in the prior art, standard gas with known humidity is filled in the sealed air chamber 7 and serves as a checking and calibrating system, the instrument can regularly adjust and drive a rotating assembly through a light adjusting knob 4, the angle of a second reflector 5 is rotated, the standard gas in the sealed air chamber 7 is detected, once the humidity is inconsistent with the actual humidity, alarm information is displayed to a display and an external USB device 11 through a data processing and control single chip microcomputer 10, and in order to prevent gas leakage of the sealed air chamber 7, a pressure sensor 8 is arranged inside the sealed air chamber 7, and once the air leakage occurs, the alarm can be given.

It is specific, when reexamining the accuracy of instrument testing result, order about rotating assembly through adjust knob 4, make the angle of second mirror 5 rotate, the laser beam accessible second mirror 5 reflection of pulse laser 3 transmission, second focusing lens 6 then accepts the laser of second mirror 5 reflection, make second focusing lens 6 form plasma in airtight air chamber 7, integrated spectral signal collector 9 gathers the spectrum, and simultaneously, convert light signal into electrical signal transmission and analyze in digital processing and the control monolithic 10 and obtain humidity information, thereby compare with actual humidity, in case find humidity inconsistent with actual humidity promptly through data processing and control monolithic 10 to display and external USB device 11 display alarm information.

It should be noted that, the utility model discloses the technical principle is based on the quantitative analysis of LIBS technique to the element, makes a calibration curve to hydrogen element spectral line intensity in the LIBS spectrum and ambient humidity, realizes using the LIBS technique to the real-time measurement of humidity on this basis, the utility model discloses at first the calibration curve of spectral line intensity and humidity will be made, this step need use the LIBS technique to measure the spectral information under the different ambient humidity before the utility model designs, obtain the intensity of the hydrogen spectral line under the different ambient humidity, according to the spectral line intensity information that different humidity and its institute correspond and record, establish a calibration curve and obtain the curve relation of hydrogen element spectral line intensity and humidity, write in the singlechip with gained calibration curve information, the utility model discloses in only need measure and obtain the humidity information that just can directly obtain this moment in LIBS spectral information transmission to the singlechip, finally export and show present real-time ambient humidity on the display screen.

The working principle of the above embodiment is as follows:

(1) When the gas sample is collected, the gas sample can be extracted through the first air pump 14 and then discharged into the detection air chamber 15;

(2) When a gas sample is detected, a pulse laser 3 can emit Nd-YAG with the wavelength of 1064nm as a laser source to generate a pulse laser beam, the laser beam is reflected by the first reflector 2, the first focusing lens 18 receives the laser reflected by the first reflector 2, the laser forms plasma in the detection gas chamber 15 after passing through the first focusing lens 18, the optical fiber probe 17 collects an emission spectrum of the plasma during cooling and transmits the emission spectrum to the spectrometer 13 to obtain an LIBS spectrum, and finally, an optical signal is converted into an electric signal by a photoelectric tube and transmitted to the digital processing and control single chip 10 to be analyzed to obtain humidity information;

(3) When reexamining the accuracy of instrument testing result, adjust through adjust luminance knob 4 and order about rotating assembly, make the angle of second mirror 5 rotate, the laser beam accessible second mirror 5 reflection of pulse laser 3 transmission, second focusing lens 6 then accepts the laser of second mirror 5 reflection, make second focusing lens 6 form plasma in airtight air chamber 7, integrated spectral signal collector 9 gathers the spectrum, simultaneously, convert light signal into the analysis that obtains humidity information in digital processing and the control monolithic 10, thereby compare with actual humidity, in case find humidity inconsistent with actual humidity promptly through data processing and control singlechip 10 to display and external USB device 11 display alarm information.

The electrical components appearing herein are all electrically connected with the controller and the power supply, the control mode of the utility model is controlled by the controller, the control circuit of the controller can be realized by simple programming of technicians in the field, the supply of the power also belongs to the common general knowledge in the field, and the utility model discloses mainly be used for protecting mechanical device, so the utility model discloses no longer explain control mode and circuit connection in detail.

It should be noted that, in this document, relational terms such as first and second, and the like are used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrases "comprising a," "8230," "8230," or "comprising" does not exclude the presence of additional like elements in a process, method, article, or apparatus that comprises the element.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.

Claims

1. A novel moisture detector comprises a shell (1), and is characterized in that: a gas sample storage assembly used for collecting and discharging a gas sample is arranged in the shell (1), and a detection mechanism used for detecting the humidity of the gas sample is arranged in the shell (1);

the gas sample storage assembly comprises a detection gas chamber (15) which is fixed in the shell (1) and used for storing a gas sample, and the top and the bottom of the detection gas chamber (15) are respectively provided with a first air pump (14) used for pumping detection gas and a second air pump (16) used for discharging the detection gas;

detection mechanism is including fixing pulse laser (3) at casing (1) inside and be used for the lasing, the back inner wall of casing (1) is equipped with and is used for carrying out the first speculum (2) that reflect to the laser of pulse laser (3) transmission, the left side of detecting air chamber (15) is fixed with one end and runs through and extends to the inside first focusing lens (18) that is used for receiving first speculum (2) reflection back laser of detecting air chamber (15), the inside of casing (1) just is located and detects air chamber (15) left side below and is fixed with spectrometer (13), the right side of spectrometer (13) is fixed with and is used for carrying out the fiber probe (17) of gathering to the spectrum, the left side of spectrometer (13) is fixed with ICCD detector (19), the inside of casing (1) is fixed with carries out analytic data processing and control (10) to the spectrum after gathering, the inside of casing (1) is provided with the reinspection subassembly.

2. The new moisture meter of claim 1, wherein: the rechecking assembly comprises a second reflector (5) which is arranged inside a shell (1) and located below a first reflector (2) and used for reflecting laser emitted by a pulse laser (3), a rotating assembly used for driving the second reflector (5) to rotate is further arranged between the shell (1) and the second reflector (5), a dimming knob (4) used for adjusting the angle of the second reflector (5) is arranged inside the shell (1), a data processing and control single chip microcomputer (10) is located below the left side of the shell (1) and fixed with a closed air chamber (7), an inner top wall of the closed air chamber (7) is fixed with a second focusing lens (6) with one end penetrating through and extending to the inside of the closed air chamber (7) and used for receiving the laser reflected by the second reflector (5), an inner bottom wall of the closed air chamber (7) is fixed with a pressure sensor (8) with one end penetrating through and extending to the bottom of the closed air chamber (7), and a right inner wall of the closed air chamber (7) is fixed with one end penetrating through and extending to the right side of the closed air chamber (7) and electrically connected with a spectrum signal collector (9) of the data processing and control single chip microcomputer (10).

3. The new moisture meter of claim 1, wherein: the inside of casing (1) just is located data processing and control singlechip (10) bottom and is fixed with display and external USB device (11), the inside of casing (1) just is located external USB device (11) right side and is fixed with power (12) of being connected with data processing and control singlechip (10) electricity.

4. The new moisture meter according to claim 2, wherein: the dimming knob (4), the pulse laser (3), the ICCD detector (19), the display and the external USB device (11) are all electrically connected with the control singlechip (10) for data processing.