KR102734132B1 - Detachable spectroscopic apparatus for analyzing specific material - Google Patents

Abstract

A spectroscopic device for analyzing a specific substance, which is detachable from a portable device, is provided. The spectroscopic device for analyzing a specific substance, which is detachable from a portable device, includes a housing that can be coupled to the portable device and a container that accommodates a sample, and further includes at least one of a light source that provides an optical signal of a specific wavelength to the sample to determine whether the sample contains a hazardous component, a detector that detects a detection signal of the specific wavelength emitted from the sample, and a microcontroller that stores a normal signal in advance when the sample does not contain the hazardous component, compares the detection signal detected from the detector with the normal signal, and determines whether the sample contains the hazardous component, wherein when the sample contains the hazardous component, the detection signal has a peak value at the specific wavelength, and the microcontroller determines that the sample contains the hazardous component if a peak value appears at the specific wavelength when comparing the normal signal and the detection signal.

Description

{DETACHABLE SPECTROSCOPIC APPARATUS FOR ANALYZING SPECIFIC MATERIAL}

The present invention relates to a spectroscopic device for analyzing a specific substance, which is detachable from a portable device.

Spectroscopy is a technique that studies the molecular structure and changes of a sample by measuring the absorption, emission, and scattering of light. Spectrometers such as IR (infrared) spectrometers and Raman spectrometers mainly measure and analyze the structure of organic substances and biochemical species by measuring the intensity of absorption, emission, and scattering by sample molecules as a spectrum for frequency or wavelength.

Spectroscopy, such as ultraviolet-visible spectroscopy (UV-VIS spectroscopy) that utilizes the Bear-Lambert law, can analyze the characteristics of various samples, including biochemical substances, by measuring particle size, wavelength-specific absorbance, and transmittance, and can discriminate samples by considering wavelength selectivity. However, conventional spectrometers and spectroscopy methods have large variations in absorption or transmittance signals due to various system noises, including changes in the signal intensity of incident light and shot noise. In addition, such noise interferes with accurate and stable measurements. To overcome these limitations, technologies are required in spectrometers and spectroscopy that remove noise, enhance molecular vibration, and efficiently improve the sensitivity of effective signals.

However, in order to manufacture a spectrometer that can operate independently, various components including a light source, detector, microcontroller, and communication unit must be included within the spectrometer, which increases the price of the spectrometer and may cause battery issues.

Korean Patent Publication No. 10-1690073, December 21, 2016.

The problem to be solved by the present invention is to provide a spectroscopic device for analyzing a specific substance that can be detachably attached to a portable device such as a smartphone.

The problems to be solved by the present invention are not limited to the problems mentioned above, and other problems not mentioned will be clearly understood by those skilled in the art from the description below.

According to one aspect of the present invention for solving the above-described problem, a spectroscopic device for analyzing a specific substance, which is detachable from a portable device, comprises a housing and a container for accommodating a sample, which is a specific substance, and further comprises at least one of a light source for providing an optical signal of a specific wavelength to the sample to determine whether the sample contains a hazardous component, a detector for detecting a detection signal of the specific wavelength emitted from the sample, and a microcontroller for extracting a valid signal from the detection signal, pre-storing a normal signal when the sample does not contain the hazardous component, and comparing the valid signal with the normal signal to determine whether the sample contains the hazardous component, wherein when the sample contains the hazardous component, the detection signal has a peak value at the specific wavelength, and when the microcontroller compares the normal signal with the valid signal, if a peak value appears at the specific wavelength, it determines that the sample contains the hazardous component.

Additionally, the microcontroller may include an encoder that generates an orthogonal code and encodes the optical signal into a pattern corresponding to the orthogonal code, and a decoder that shares the orthogonal code with the encoder and decodes the detection signal based on a correlation between the orthogonal code and the detection signal.

Additionally, the decoder can extract a valid signal by removing noise included in the detection signal based on the orthogonal code.

In addition, the orthogonal code is a binary sequence, and the pulse waveform of the optical signal can be encoded by line encoding according to the orthogonal code.

In addition, it further includes a communication unit for communicating with a user device, and the communication unit can transmit the corresponding result data to the user device when it is confirmed by the microcontroller whether the sample contains a harmful component.

Additionally, when the communication unit receives sample information to be analyzed from the user device, the microcontroller can determine the wavelength and number of light sources required to identify harmful components based on the sample information.

In addition, when the number of the light sources is plural, each light signal provided by the plural light sources may be sequentially provided to the sample, and the microcontroller may encode each light signal into a pattern corresponding to a different orthogonal code.

In addition, when the number of light sources is plural, the detector may detect each detection signal emitted from the sample, the microcontroller may decode each detection signal, add up each of the decoded detection signals to obtain a valid signal, and compare the obtained valid signal with a normal signal.

Additionally, the detection signal may be generated by absorption, scattering, transmission or reflection of all or part of the optical signal from the sample.

In addition, the invention may further include a cover that is formed to be openable and closable and is coupled to the top of the housing or the container to block light from the outside.

Additionally, the container may be formed to be detachable from the housing.

Other specific details of the present invention are included in the detailed description and drawings.

According to the present invention described above, since the spectroscopic device is detachable from a portable device such as a smartphone, the spectroscopic device can be miniaturized with a simpler structure.

In addition, by efficiently removing noise from the detection signal using an orthogonal code, more reliable analysis results can be extracted, thereby enabling more accurate confirmation of whether a specific material contains a hazardous substance.

The effects of the present invention are not limited to the effects mentioned above, and other effects not mentioned will be clearly understood by those skilled in the art from the description below.

FIG. 1 is a block diagram of a spectroscopic device for analyzing a specific substance that is detachable from a portable device according to one embodiment of the present invention.
FIG. 2 is a schematic cross-sectional view of a spectroscopic device for analyzing a specific substance that is detachable from a portable device according to one embodiment of the present invention.
FIG. 3 is a drawing for explaining the coupling of a spectroscopic device for analysis of a specific substance that is detachable from a portable device according to one embodiment of the present invention to a portable device.
FIG. 4 is a conceptual diagram of a spectroscopic device for analyzing a specific substance that is detachable from a portable device according to one embodiment of the present invention.
FIG. 5 is a drawing for explaining in more detail a spectroscopic device for analyzing a specific substance that is detachable from a portable device according to one embodiment of the present invention.
FIGS. 6 and 7 are block diagrams for more specifically explaining channels included in the light source of FIG. 6 according to one embodiment of the present invention.
FIG. 9 is a flow chart illustrating a spectroscopic method for analyzing a specific material according to one embodiment of the present invention.
Fig. 10 is a flowchart to explain the spectroscopy method of Fig. 9 in more detail in the time domain.
Figure 11 is a flowchart to explain step S240 of Figure 10 in more detail.
Fig. 12 is a flowchart to explain the spectroscopy method of Fig. 9 in more detail in the frequency domain.
Figure 13 is a flowchart to explain step S340 of Figure 12 in more detail.
FIG. 14 is a flow chart of a spectroscopic method for analyzing a specific material according to another embodiment of the present invention.
Figure 15 is a flowchart illustrating steps S440 and S450 of Figure 14 in more detail.

The advantages and features of the present invention, and the methods for achieving them, will become clear with reference to the embodiments described in detail below together with the accompanying drawings. However, the present invention is not limited to the embodiments disclosed below, but may be implemented in various different forms, and the present embodiments are provided only to make the disclosure of the present invention complete and to fully inform a person skilled in the art of the scope of the present invention, and the present invention is defined only by the scope of the claims.

The terminology used herein is for the purpose of describing embodiments only and is not intended to limit the present invention. In this specification, the singular also includes the plural unless specifically stated otherwise in the phrase. The terms "comprises" and/or "comprising" as used in the specification do not exclude the presence or addition of one or more other components in addition to the mentioned components. Like reference numerals refer to like components throughout the specification, and "and/or" includes each and every combination of one or more of the mentioned components. Although "first", "second", etc. are used to describe various components, it is to be understood that these components are not limited by these terms. These terms are merely used to distinguish one component from another. Therefore, it should be understood that a first component mentioned below may also be a second component within the technical spirit of the present invention.

Unless otherwise defined, all terms (including technical and scientific terms) used in this specification may be used with the meaning commonly understood by those skilled in the art to which the present invention belongs. In addition, terms defined in commonly used dictionaries shall not be ideally or excessively interpreted unless explicitly specifically defined.

The spatially relative terms "below," "beneath," "lower," "above," "upper," and the like can be used to easily describe the relationship between one component and other components as depicted in the drawings. The spatially relative terms should be understood to include different orientations of the components when used or operated in addition to the orientations depicted in the drawings. For example, if a component depicted in the drawings is flipped over, a component described as "below" or "beneath" another component may be placed "above" the other component. Thus, the exemplary term "below" can include both the above and below orientations. The components may also be oriented in other directions, and the spatially relative terms may be interpreted accordingly.

Hereinafter, embodiments of the present invention will be described in detail with reference to the attached drawings.

FIG. 1 is a block diagram of a spectroscopic device for analyzing a specific substance that is detachable from a portable device according to an embodiment of the present invention, FIG. 2 is a schematic cross-sectional view of a spectroscopic device for analyzing a specific substance that is detachable from a portable device according to an embodiment of the present invention, FIG. 3 is a drawing for explaining a coupling of a spectroscopic device for analyzing a specific substance that is detachable from a portable device according to an embodiment of the present invention with a portable device, and FIG. 4 is a conceptual diagram of a spectroscopic device for analyzing a specific substance that is detachable from a portable device according to an embodiment of the present invention.

The spectroscopic device (100) (hereinafter, “spectroscopic device”) for analyzing a specific substance that can be attached to a portable device of the present invention is manufactured or set to analyze only a specific substance. Conventional spectroscopic devices have limitations in miniaturization or cost reduction because they operate independently, but the spectroscopic device (100) of the present invention is designed to be attached to a portable device.

Referring to FIG. 1, the spectroscopic device (100) includes a housing (110) and a container (120), and further includes at least one of a light source (130), a detector (140), a microcontroller (150), and a communication unit (160). Here, the components lacking in the spectroscopic device (100) can be assisted by the components of the portable device (200).

The housing (110) forms the exterior of the spectroscopic device (100).

Here, referring to FIG. 3, the housing (110) includes an area that can be coupled to the portable device (200). That is, the spectroscopic device (100) can be coupled to the portable device (200) through the housing (110). For example, referring to FIG. 3(a), the spectroscopic device (100) can be coupled to the portable device (200) through a physical coupling, and referring to FIG. 3(b), the spectroscopic device (100) can be physically/electrically coupled to the portable device (200) by having a coupling area (101) having the shape of an insertion protrusion inserted into an earphone insertion port or a charging terminal insertion port of the portable device (200).

The housing (110) forms a space in which other components of the spectrometer (100) are mounted.

The housing (100) can be formed so that light cannot penetrate from the outside into the housing (100).

The container (120) refers to a space that accommodates a sample (10) and where measurements are made by a light source (130) and a detector (140).

At this time, the sample (10) may be an analysis target of the spectroscopic device (100). The sample (10) may be a specific material or substance for analysis. The sample (10) may absorb all or part of the optical signal provided from the light source (130). In addition, the sample (10) may transmit or reflect all or part of the optical signal. Here, all or part of the optical signal may mean all or part of the wavelength, all or part of the frequency, and all or part of the pattern. The sample (10) provided with the optical signal may emit light in response to the optical signal. Here, the light may also be referred to as a detection signal. The sample (10) may generate a detection signal according to internal molecular vibration caused by the optical signal provided from the light source.

The container (120) is formed to be inserted into the housing (10), as shown in FIG. 2, and is formed to be detachable in and out of the housing (110).

The container (120) may be made of a transparent material through which light irradiated from a light source (130) may be transmitted.

During repeated measurement processes, the container (120) may be contaminated by the sample (10). If the container (120) is contaminated, that is, if there is sample (10) residue inside the container (120), an error may occur in the analysis results. Therefore, to prevent this situation from occurring, the container (120) may be formed so that it can be replaced or washed.

In addition, the spectroscopic device (100) may include a cover (not shown) that blocks light from the outside. At this time, it is formed to be opened and closed by being connected to the top of the housing (110) or container (120).

A light source (130) provides an optical signal of a specific wavelength to a sample (10).

When there are multiple light sources (130), each light signal provided by the multiple light sources is sequentially provided to the sample (10).

As shown in Fig. 2(a), a light source (130) is fixed to the lower surface of the housing (110) so as to be positioned below the container (120), and irradiates light to the sample (10) through the container (120).

As shown in Fig. 2(b), a light source (130) is fixed to one inner surface of the housing (110) so as to be positioned opposite the container (120), and irradiates light to the sample (10) through the container (120).

The light source (130) may include at least one light source having a single wavelength, such as a laser or a laser diode, or a white lamp. Additionally, the light source (130) may include at least one light source having a broad spectrum, such as a red light-emitting diode (LED), a blue LED, a green LED, and a near-infrared (NIR) LED. Additionally, the light source (120) may include at least one light source separated by a polarization state (e.g., 0, 45, or 90 degrees) having a single wavelength.

The number and type of light sources (130) can be determined according to the specific material being analyzed. That is, a wavelength band required to determine whether a specific material contains a hazardous substance can be identified, and a light source (130) that irradiates light of the corresponding wavelength band can be used. For example, assuming that the wavelength band required for analyzing a sample (10) is wavelength band a, a light source (130) that irradiates light of wavelength band a can be used. Alternatively, if a white lamp that irradiates all wavelength bands is the light source (130), the white lamp can be set to irradiate only wavelength band a by the user device.

At this time, if multiple wavelength bands (e.g., a wavelength band, b wavelength band, c wavelength band) are required for analysis of a specific material, three light sources (130) that respectively irradiate the a wavelength band, the b wavelength band, and the c wavelength band may be used, or a white lamp may be set by the user device to irradiate only the a wavelength band, the b wavelength band, and the c wavelength band.

Accordingly, since the spectroscopic device (100) is manufactured or set up only for the analysis of a specific material, the spectroscopic device (100) can be miniaturized, and thus the unit price of the spectroscopic device (100) can be significantly reduced.

As shown in FIG. 4, the detector (140) detects a detection signal of a specific wavelength emitted from the sample (10).

The detector (140) can detect or receive a detection signal from the sample (10). The detector (140) can detect by separating the detection signal by wavelength band. The detector (130) can measure a spectrum for the frequency or wavelength of the detection signal.

As shown in Fig. 2(a), the detector (140) is fixed to the lower surface of the housing (110) so as to be positioned below the container (120), and receives a detection signal emitted to the sample (10) through the container (120).

As shown in Fig. 2(b), the detector (140) is fixed to one inner surface of the housing (110) so as to be positioned opposite the container (120), but facing the light source (130) with the container (120) interposed therebetween. The detector (140) receives a detection signal emitted to the sample (10) through the container (120).

When there are multiple light sources (130), the detector (130) can sequentially detect multiple detection signals emitted from the sample (10), or can detect one detection signal by separating it into multiple wavelength bands.

Although not shown in FIGS. 1 to 4, the spectroscopic device (100) may include an optical element between the sample (10) and the detector (140). The optical element may include a diffractive element that diffracts a detection signal and a dispersive element that disperses the detection signal. The optical element may effectively collect a detection signal from the sample (10) to the detector (140) by dispersing or diffracting the detection signal.

The microcontroller (150) determines whether the sample (10) contains a harmful component.

Specifically, the microcontroller (150) can store in advance a normal signal when the sample (10) does not contain a harmful component, and compare the normal signal with a detection signal detected from the detector (140) to determine whether the sample contains a harmful component.

As illustrated in FIG. 4, the microcontroller (150) includes an encoder (152) and a decoder (154).

The encoder (152) can generate an orthogonal code for encoding an optical signal. The encoder (152) can generate an orthogonal code and modulate an optical signal into a pattern of the orthogonal code.

At this time, the optical signal is a signal of a specific wavelength band. That is, the spectroscopic device (100) is preset so that it can use only the wavelength band required for analyzing the sample (10), so that when analyzing the sample (10), analysis can be performed only for a specific wavelength band.

In one embodiment, the light source (130) can receive an orthogonal code from the encoder (152). The light source (130) can be modulated according to the orthogonal code received from the encoder (152). When only one light source (130) is required for analyzing the sample (10), the encoder (152) generates one orthogonal code and modulates an optical signal for a specific wavelength band by encoding it into a pattern corresponding to one orthogonal code.

When there are multiple light sources (130) required for sample (10) analysis, the encoder (152) generates multiple orthogonal codes and modulates each optical signal for multiple wavelength bands by encoding it into a pattern corresponding to a different orthogonal code.

Methods for modulating a light source (130) with an orthogonal code may include optical modulation methods, electrical modulation methods, and mechanical modulation methods. Each modulation method is described in detail later in FIGS. 6 to 8.

The decoder (154) receives a detection signal from the detector (140) and decodes the detection signal. At this time, the detection signal is also a signal of a specific wavelength band.

The decoder (154) can extract or obtain a valid signal from the detection signal. That is, the decoder (154) can extract a valid signal by performing convolution on the detection signal with an orthogonal code.

At this time, the decoder (152) can align timing with the encoder (152) by clock synchronization. The decoder (154) can synchronize the orthogonal code from the encoder (152). The encoder (152) can transmit data and signals to the decoder (154), and the decoder (154) can receive data and signals from the encoder (152). The data and signals can include information about the orthogonal code. That is, the decoder (154) can share the orthogonal code with the encoder (152).

Accordingly, the decoder (154) performs convolution of the detection signal using the same orthogonal code as the orthogonal code used when the optical signal was encoded, thereby obtaining a valid signal.

The spectroscopic device (100) according to the present invention, which performs analysis using a valid signal based on an orthogonal code, can increase the intensity and sensitivity of a signal for molecules of a sample (10), such as food and organic molecules. The spectroscopic device (100) according to the present invention can improve the performance of sensing and imaging technology for a sample (10).

The microcontroller (150) can analyze the sample (10) based on the valid signal extracted from the decrypted detection signal. That is, the microcontroller (150) can compare the valid signal with the normal signal to determine whether the sample (10) contains a harmful component.

Specifically, when the sample (10) contains a harmful component, the detection signal has a peak value at a specific wavelength. Accordingly, when the microcontroller (150) compares the normal signal and the detection signal (valid signal), if, unlike the normal signal, the valid signal has a peak value at a specific wavelength, the microcontroller (150) can determine that the sample (10) contains a harmful component.

Here, the normal signal is data that is stored in advance in the storage unit (not shown) of the spectrometer (100), and is data that represents a signal when the sample (10) to be analyzed is in a normal state (when it does not contain harmful components). Therefore, the microcontroller (150) can compare the stored normal signal with the extracted detection signal (valid signal) and determine that the sample (10) is not normal if there is a discrepancy.

The communication unit (160) communicates with an external device (e.g., a user device).

Here, the user is a person who performs analysis of a specific material using a spectroscopic device (100). The user can perform analysis by installing a program (application) on the user device. At this time, the program represents a program provided by a company that provides a specific material analysis service using a spectroscopic device (100).

In one embodiment, the spectroscopic device (100) is manufactured for the purpose of analyzing a specific material, and thus is manufactured with the number of light sources (130) and wavelength band set according to the specific material. Accordingly, when a user makes an analysis request through a user device, the spectroscopic device (100) performs analysis of a sample (10) and provides result data on whether a harmful component is included in the sample (10) through an application of the user device.

In another embodiment, the spectroscopic device (100) may determine the number and wavelength band of light sources (130) according to the settings of the user device. When the user inputs sample information to be analyzed through an application installed on the user device, the spectroscopic device (100) (specifically, the microcontroller (150) determines the wavelength and number of light sources (130) based on the sample information. That is, the wavelength band required to analyze the sample and the number of light sources (130) for irradiating light of the corresponding wavelength band may be determined, and analysis may be performed.

Hereinafter, with reference to FIGS. 5 to 13, a detailed description will be given of encoding an optical signal using an orthogonal code, performing convolution with the detection signal using the same orthogonal code, and extracting a valid signal from the detection signal.

FIG. 5 is a drawing for explaining in more detail a spectroscopic device for analyzing a specific substance that is detachable from a portable device according to one embodiment of the present invention.

FIG. 5 will be described with reference to FIG. 4. The encoder (152) may include a code generator (not shown). The light source (130) may include first to third channels (131-133). The detector (140) may include an array sensor (141). The decoder (154) may include a signal processor (not shown).

A code generator (not shown) can generate an orthogonal code for encoding an optical signal. The orthogonal code may be a code based on orthogonality. Specifically, a plurality of different orthogonal codes may be orthogonal to each other. That is, cross-correlation values between a plurality of different orthogonal codes may be 0. For example, the orthogonal code may be a PN (pseudo-noise) code or a gold code. The orthogonal code may be a binary sequence. The code generator (not shown) can generate a plurality of orthogonal codes. The code generator (not shown) can separate and output the plurality of orthogonal codes. The code generator (not shown) can output the plurality of orthogonal codes simultaneously.

The light source (130) includes one or more channels. The number of channels included in the light source (130) may be determined depending on the wavelength required to analyze the sample (10). That is, if one wavelength is used to analyze a specific sample (10), the light source (130) may include one channel, and if three wavelengths are used to analyze a specific sample, the light source (130) may include three channels.

The first channel (131) can output an optical signal toward the sample (10). Before outputting the optical signal, the first channel (131) can determine a wavelength of the optical signal. The first channel (131) can output an optical signal having the determined wavelength. The wavelengths of the optical signals output by the first to third channels (131-133) are different from each other.

In one embodiment, the first channel (131) can receive a first orthogonal code generated by a code generator (not shown) and generate a first optical signal based on the first orthogonal code. The first orthogonal code can be modulated into the first optical signal through the first channel (131). The first channel (131) can encode the first optical signal with a pattern corresponding to the first orthogonal code. The first channel (131) can encode a pulse waveform of the first optical signal with a pattern corresponding to a binary sequence of the first orthogonal code. The first channel (131) can encode the pulse waveform of the first optical signal by line encoding according to the first orthogonal code.

Referring to FIG. 5, for example, if the first orthogonal code is a binary sequence of 1110100, the magnitude of the pulse waveform of the first optical signal can sequentially correspond to the bit values of the first orthogonal code. The second and third channels (132, 133) can be implemented by the same principle as the first channel (131), and like the first channel (131), the second and third channels (132, 133) can encode the second and third optical signals based on the second orthogonal code (e.g., 1001011) and the second orthogonal code (e.g., 1101011) by the same principle as the first channel. That is, the second and third orthogonal codes can be modulated into the second and third optical signals via the second and third channels (132, 133), respectively. In Fig. 5, only the first to third channels (131-133) are illustrated, but the number of channels included in the light source (130) is not limited to three.

The array sensor (141) can detect or receive a detection signal from the sample (10). The array sensor (141) can detect a plurality of detection signals. Here, each of the plurality of detection signals can correspond to the first to third channels (131-133). The array sensor (141) can include a plurality of pixels, and the plurality of pixels can correspond to the plurality of detection signals, respectively. The array sensor (141) can receive a plurality of detection signals simultaneously or sequentially.

A signal processor (not shown) can receive a detection signal from a detector (140) and extract a valid signal from the detection signal. The signal processor (not shown) can receive a plurality of detection signals and obtain a valid signal based on the plurality of detection signals.

A signal processor (not shown) can synchronize a code generator (not shown) and a plurality of orthogonal codes. The signal processor (not shown) can receive data and signals including information about the orthogonal codes from the code generator (not shown). The signal processor (not shown) can share the orthogonal codes with the code generator (not shown). The signal processor (not shown) can receive a plurality of detection signals each corresponding to the plurality of orthogonal codes from the array sensor (141) and extract a valid signal from the plurality of detection signals based on the plurality of orthogonal codes. In one embodiment, the signal processor (not shown) can receive a detection signal corresponding to a first orthogonal code among the plurality of orthogonal codes. The signal processor (not shown) can obtain an operation result based on a correlation between the first orthogonal code and the detection signal corresponding to the first orthogonal code. Repeatedly, the signal processor (not shown) can obtain a plurality of operation results based on the correlation from the plurality of orthogonal codes and the plurality of detection signals. A signal processor (not shown) can obtain a valid signal by adding up multiple operation results.

FIGS. 6 and 7 are block diagrams for more specifically explaining channels included in the light source of FIG. 5 according to one embodiment of the present invention.

Referring to FIG. 6, the channel (131a) may include a driver (131a_1) and an optical signal generator (131a_2). The channel (131a) may be substantially identical to the first to third channels (131-133) of FIG. 5. FIG. 6 will be described with reference to FIG. 5.

The driver (131a_1) may be a device for generating an optical signal by an electrical modulation method. The driver (131a_1) may generate a driving signal based on an orthogonal code received from a code generator (not shown) by the channel (131a). The driving signal may include information about the orthogonal code. The driving signal may be an electrical control signal.

The optical signal generator (131a_2) can generate an optical signal provided as a sample (10). The optical signal generator (131a_2) can generate an optical signal together with an encoding process. The optical signal generator (131a_2) can be implemented with various devices including an LED, a laser diode, etc.

The driver (131a_1) can transmit a driving signal to the optical signal generator (131a_2), and the optical signal generator (131a_2) can receive the driving signal. The optical signal generator (131a_2) can be controlled by the driving signal. The optical signal generator (131a_2) can generate an optical signal encoded with a pattern corresponding to the orthogonal code based on the driving signal including the orthogonal code.

Referring to FIG. 7, the channel (131b) may include a continuous wave generator (131b_1) and an optical modulator (131b_2). The channel (131b) may be substantially identical to the first to third channels (131-133) of FIG. 5. FIG. 7 will be described with reference to FIG. 5.

The continuous wave generator (131b_1) can output light of a continuous wave form. Here, the continuous wave form can be various waveforms including a sine wave and a square wave. Before outputting the continuous wave, the continuous wave generator (131b_1) can determine the wavelength, phase, and amplitude of the continuous wave.

The optical modulator (131b_2) may be a device for generating an optical signal by an optical modulation method. The optical modulator (131b_2) may be operated according to an operating voltage. The operating voltage of the optical modulator (131b_2) may be adjusted according to an orthogonal code received from a code generator (not shown) by the channel (131b). The optical modulator (131b_2) may modulate the phase and amplitude of light according to the operating voltage.

A continuous wave generator (131b_1) can output a continuous wave toward an optical modulator (131b_2). The continuous wave generator (131b_1) can provide a continuous wave to the optical modulator (131b_2), and the optical modulator (131b_2) can modulate the amplitude and phase of the continuous wave. The optical modulator (131b_2) can modulate the amplitude and phase of the continuous wave based on an orthogonal code received from a code generator (not shown) by the channel (131b). The optical modulator (131b_2) can generate an optical signal encoded with a pattern corresponding to the orthogonal code by modulating the amplitude and phase of the continuous wave according to the orthogonal code. An operating voltage of the optical modulator (131b_2) can be adjusted by the orthogonal code. An optical modulator (131b_2) can modulate a continuous wave into an optical signal encoded with a pattern corresponding to an orthogonal code based on an adjusted operating voltage.

Referring to FIG. 8, the channel (131c) may include a continuous wave generator (131c_1), at least one slit (131c_2), and a slit controller (131c_3). The channel (131c) may be substantially identical to the first to third channels (131-133) of FIG. 5. FIG. 8 will be described with reference to FIGS. 5 and 7.

The continuous wave generator (131c_1) may be substantially the same as the continuous wave generator (131b_1) of Fig. 7. Therefore, a detailed description of the continuous wave generator (131c_1) in Fig. 8 is omitted.

At least one slit (131c_2) can transmit a continuous wave output from a continuous wave generator (131c_1). At least one slit (131c_2) can adjust the transmittance of the continuous wave. At least one slit (131c_2) can diffract the transmitting continuous wave.

The slit controller (131c_3) can generate a control signal for controlling at least one slit (131c_2). The control signal of the slit controller (131c_3) can be generated based on an orthogonal code received from a code generator (not shown) by the channel (131c). The slit controller (131c_3) can transmit the control signal to at least one slit (131c_2).

In one embodiment, the slit controller (131c_3) can transmit a control signal to at least one slit (131c_2), and at least one slit can receive the control signal. The slit controller (131c_3) can control an opening/closing operation of at least one slit (131c_2) by the control signal. The slit controller (131c_3) can adjust the opening/closing operation of at least one slit (131c_2) to be identical to a pattern corresponding to an orthogonal code. At least one slit (131c_2) can modulate a continuous wave into an optical signal encoded with a pattern corresponding to an orthogonal code based on the opening/closing operation in response to the control signal.

Fig. 9 is a flow chart showing a spectroscopic method for analyzing a specific material according to one embodiment of the present invention. Fig. 9 will be described with reference to Fig. 4.

In step S110, the light source (130) can generate an optical signal (ENC) encoded with a pattern corresponding to the orthogonal code (OC) based on the orthogonal code (OC) and the continuous wave signal (CW). The light source (130) can perform convolution of the orthogonal code (OC) and the continuous wave signal (CW). The light source (130) can generate an optical signal (ENC) based on the result of the convolution.

At step S120, a light source (130) can provide an optical signal (ENC) to the sample (10). At step S130, a detector (140) can detect a detection signal (DET) from the sample (10). All or part of the optical signal (ENC) can be absorbed, transmitted, scattered, and reflected by the sample (10). The detection signal (DET) can be a result of the optical signal (ENC) absorbed, transmitted, scattered, and reflected by the sample (10). Additionally, the detection signal (DET) can be a deformation of the optical signal (ENC). The detection signal (DET) can include an effective signal (EFF) for analyzing the sample (10) and noise. The detection signal (DET) by itself may not be useful for analyzing the sample (10). For example, the detection signal (DET) by itself may not be able to determine the chemical composition of the sample (10) (e.g., molecular structure, molecular changes, molecular weight, etc.).

In step S140, the decoder (154) can remove noise from the detection signal (DET) to extract the effective signal (EFF). The decoder (154) can decode the detection signal (DET). The decoder (154) can perform convolution of the orthogonal code (OC) received from the encoder (152) and the detection signal (DET). The decoder (154) can obtain the effective signal (EFF) based on the result of the convolution. The effective signal (EFF) can have high accuracy for analyzing the sample (10). The spectroscopic device (100) can determine the chemical composition (e.g., molecular structure, molecular change, molecular weight, etc.) of the sample (10) based on the effective signal (EFF).

Fig. 10 is a flowchart for explaining the spectroscopy method of Fig. 9 in the time domain in more detail. Fig. 10 will be explained with reference to Figs. 4 and 9. Step S210 may correspond to step S110 of Fig. 9, step S220 may correspond to step S120 of Fig. 9, step S230 may correspond to step S130 of Fig. 9, and step S240 may correspond to step S140 of Fig. 9. Referring to Fig. 10, a continuous wave signal (T10), an optical signal (T20), a detection signal (T30), and a valid signal (T40) may be expressed as a magnitude graph over time.

At step S210, the light source (130) can encode the continuous wave signal (T10) into an optical signal (T20). The continuous wave signal (T10) can correspond to the continuous wave signal (CW) of FIG. 9, and the optical signal (T20) can correspond to the optical signal (ENC) of FIG. 9. The encoder (152) can match the timing with the light source (130) by clock synchronization. The encoder (152) can provide an orthogonal code (OC) to the light source (130) based on the timing.

The light source (130) can generate an optical signal (T20) encoded with a pattern corresponding to an orthogonal code (OC) from a continuous wave signal (T10) based on a timing synchronized with the encoder (152). The light source (130) can perform convolution of the orthogonal code (OC) and the continuous wave signal (T10) based on a timing synchronized with the encoder (152). The light source (130) can generate an optical signal (T20) based on the result of the convolution.

At step S220, the light source (130) can provide a light signal (T20) to the sample (10). At step S230, the detector (140) can detect a detection signal (T30) from the sample (10). The detection signal (T30) can correspond to the detection signal (DET) of FIG. 9. The light signal (T20) from the sample (10) can cause molecular vibration of the sample (10) over time. Based on the molecular vibration of the sample (10), a detection signal (T30) such as absorption, scattering, transmission, and reflection can be emitted from the sample (10).

In step S240, the decoder (154) can extract the valid signal (T40) from the detection signal (T30). The valid signal (T40) can correspond to the valid signal (EFF) of FIG. 9. The decoder (154) can align timing with the encoder (152) by clock synchronization. The decoder (154) can receive an orthogonal code (OC) from the encoder (152) based on the timing. The decoder (154) can perform convolution of the orthogonal code (OC) and the detection signal (T30) based on the timing synchronized with the encoder (152). The decoder (154) can obtain the valid signal (T40) based on the result of the convolution. The signal-to-noise ratio (SNR) of the valid signal (T40) can be improved.

Fig. 11 is a flowchart for more specifically explaining step S240 of Fig. 10. Fig. 11 will be explained with reference to Figs. 4 and 10.

The detection signal (T30) may include a valid component (T31) and a noise component (T32). The valid component (T31) may be generated from molecular vibration of the sample (10) over time. The noise component (T32) may be generated from factors other than molecular vibration of the sample (10) over time. In FIG. 11, the valid component (T31) and the noise component (T32) are separated, but in one embodiment of the present invention, the valid component (T31) and the noise component (T32) may not be separated from the detection signal (T30).

In step S241, the decoder (154) can perform convolution of the orthogonal code (OC) received from the encoder (152) and the valid component (T31) based on the timing synchronized with the encoder (152). The correlation value of the orthogonal code (OC) and the valid component (T31) can be 1. Therefore, the valid component (T31) can be converted into a decoded valid component (T41). Here, the decoded valid component (T41) can be a state corresponding to the optical signal (T20) before being modulated or encoded. That is, the valid component (T31) can be restored by the orthogonal code (OC).

In step S242, the decoder (154) can perform convolution of the orthogonal code (OC) received from the encoder (152) and the noise component (T32) based on the timing synchronized with the encoder (152). The noise component (T32) and the valid component (T31) can be convolved with the same orthogonal code (OC). The correlation value of the orthogonal code (OC) and the noise component (T32) can be 0. Therefore, the noise component (T32) can be converted into a decoded noise component (T42). Here, the decoded noise component (T42) can be a signal in which noise is weakened or partially or completely removed by the orthogonal code (OC). As a result, the valid signal (T40) can include the decoded valid component (T41) and the decoded noise component (T42). The signal-to-noise ratio of the valid signal (T40) can be improved.

Fig. 12 is a flowchart for explaining the spectroscopy method of Fig. 9 in more detail in the frequency domain. Fig. 12 will be explained with reference to Figs. 5 and 9. Step S310 may correspond to step S110 of Fig. 9, step S320 may correspond to step S120 of Fig. 9, step S330 may correspond to step S130 of Fig. 9, and step S340 may correspond to step S140 of Fig. 9. Referring to Fig. 12, a continuous wave signal (F10), an optical signal (F20), a detection signal (F30), and a valid signal (F40) may be expressed as a spectrum graph of intensity according to a wavelength.

In step S310, the light source (130) can encode the continuous wave signal (F10) into the optical signal (F20). The continuous wave signal (F10) can correspond to the continuous wave signal (CW) of FIG. 9, and the optical signal (F20) can correspond to the optical signal (ENC) of FIG. 9. The encoder (152) can provide the optical source (130) with an orthogonal code (OC) that spreads a bandwidth. The optical source (130) can perform convolution of the orthogonal code (OC) and the continuous wave signal (F10). By spectrum spreading and convolution, the bandwidth of the optical signal (F20) can be wider than the bandwidth of the continuous wave signal (F10). The optical source (130) can generate the optical signal (F20) spread by the orthogonal code (OC) based on the result of the convolution. The energy of the optical signal (F20) can be equal to the energy of the continuous wave signal (F10).

At step S320, the light source (130) can provide an optical signal (F20) to the sample (10). At step S330, the detector (140) can detect a detection signal (F30) from the sample (10). The detection signal (F30) can correspond to the detection signal (DET) of FIG. 9. The sample (10) can absorb, scatter, transmit, and reflect the optical signal (F20) in a specific wavelength range. Molecular vibration of the sample (10) can occur due to the optical signal (F20). The detection signal (F30) such as absorption, scattering, or transmission can be emitted from the sample (10) based on the molecular vibration of the sample (10) for a specific wavelength range.

At step S340, the decoder (154) can extract the valid signal (F40) from the detection signal (F30). The valid signal (F40) can correspond to the valid signal (EFF) of FIG. 9. The decoder (154) can perform convolution of the orthogonal code (OC) received from the encoder (152) and the detection signal (F30). By spectrum despreading and convolution, the bandwidth of the detection signal (F30) can be restored. The decoder (154) can obtain the valid signal (F40) from the detection signal (F30) based on the result of the convolution.

Fig. 13 is a flowchart for more specifically explaining step S340 of Fig. 12. Fig. 13 will be explained with reference to Figs. 5 and 11.

As in the time domain, the detection signal (F30) may include a significant component (F31) and a noise component (F32). The significant component (F31) may be generated from molecular vibration of the sample (10) for all or part of the wavelength range of the optical signal (F20). The noise component (F32) may be generated from factors other than molecular vibration of the sample (10) for all or part of the wavelength range of the optical signal (F20). In FIG. 13, the significant component (F31) and the noise component (F32) are separated, but in one embodiment of the present invention, the significant component (F31) and the noise component (F32) may not be separated from the detection signal (F30).

In step S341, the decoder (154) can perform convolution of the orthogonal code (OC) received from the encoder (152) and the effective component (F31). The correlation value of the orthogonal code (OC) and the effective component (F31) can be 1. Therefore, the effective component (F31) can be converted into a decoded effective component (F41). Here, the decoded effective component (F41) can be a state corresponding to the optical signal (F20) before being modulated or encoded. That is, the effective component (F31) can be restored by the orthogonal code (OC).

In step S342, the decoder (154) can perform convolution of the orthogonal code (OC) received from the encoder (152) and the noise component (F32) based on the timing synchronized with the encoder (152). The noise component (F32) and the valid component (F31) can be convolved with the same orthogonal code (OC). The correlation value of the orthogonal code (OC) and the noise component (F32) can be 0. Therefore, the noise component (F32) can be converted into a decoded noise component (F42). Here, the decoded noise component (F42) can be a signal in which noise is weakened or partially or completely removed by the orthogonal code (OC). As a result, the valid signal (F40) can include the decoded valid component (F41) and the decoded noise component (F42). The signal-to-noise ratio of the valid signal (F40) can be improved.

Fig. 14 is a flow chart of a spectroscopic method for analyzing a specific material according to another embodiment of the present invention. Fig. 14 will be described with reference to Fig. 5.

The following steps (S410 to S460) of the spectroscopic method for analyzing a specific material of the present invention are performed by a spectroscopic device (100) for analyzing a specific material. Since the specific material is determined in advance as a sample (10), the number and wavelength of the light sources (130) used for performing the spectroscopic method are determined according to the specific material. That is, depending on the type of the sample (10), which is a specific material, the wavelength used for analysis may be one or multiple, and accordingly, the number of light sources (130) required may also be one or multiple. Specifically, if the wavelength used is one, one light source (130) may be used, and even if the wavelengths used are multiple, one light source (130) may be used, or each light source (130) may be used according to the wavelength used.

In step S410, the light source (130) can generate one or more optical signals based on one or more orthogonal codes. A code generator (not shown) can generate one or more orthogonal codes. The one or more orthogonal codes may be all different from each other or all the same from each other. When the one or more orthogonal codes are all different from each other, the one or more orthogonal codes may be codes that are orthogonal to each other. That is, the cross-correlation values between the one or more different orthogonal codes may be 0. The code generator (not shown) can provide an orthogonal code to each of a plurality of channels included in the light source (130). Each of the one or more orthogonal codes generated by the code generator (not shown) may correspond one-to-one to each of the one or more channels.

At step S420, the light source (130) can provide one or more optical signals generated based on one or more orthogonal codes received from a code generator (not shown) to the sample (10). Each of the one or more channels can generate an optical signal encoded with a pattern corresponding to the orthogonal code received from the code generator (not shown). Each of the one or more channels included in the light source (130) can output an optical signal toward the sample (10). The wavelengths of the one or more optical signals can be different from each other.

In step S430, the detector (140) can detect one or more detection signals, each corresponding to one or more optical signals from the sample (10). The one or more optical signals output from the light source (130) toward the sample (10) can be absorbed, transmitted, scattered, and reflected by the sample (10). The sample (10) can emit one or more detection signals based on the one or more optical signals absorbed, transmitted, scattered, and reflected by the sample (10). The one or more detection signals can be variations of the one or more optical signals. The detector (140) can receive one or more detection signals simultaneously or sequentially.

At step S440, the decoder (154) can perform a convolution of one or more detection signals and one or more orthogonal codes. The decoder (154) can perform a convolution on one of the one or more detection signals and all of the one or more orthogonal codes. Repeatedly, the decoder (154) can perform convolutions on one or more orthogonal codes and all of the one or more detection signals. Alternatively, the decoder (154) can perform a convolution on one of the one or more detection signals and only one orthogonal code corresponding to one detection signal. The decoder (154) can perform the convolutions multiple times and can perform the convolutions simultaneously or sequentially. The decoder (154) can obtain a result of the convolution on one or more orthogonal codes and one or more detection signals.

At step S450, the decoder (154) can obtain a valid signal based on the results of the convolutions.

In the case where there are multiple orthogonal codes and detection signals (in the case where there are multiple light sources), the decoder (154) can obtain a valid signal by adding up the results of convolutions for the multiple orthogonal codes and the multiple detection signals. Obtaining a valid signal by adding up the results of convolutions for the multiple orthogonal codes and the multiple detection signals will be described in more detail in FIG. 14.

At step S460, the microcontroller (150) compares the valid signal and the normal signal to determine whether the sample (10) contains a harmful component.

A normal signal is a signal indicating that the sample (10) is in a normal state, that is, does not contain a harmful component. Therefore, by comparing a valid signal obtained through analysis of the sample (10) with a previously stored normal signal, if the valid signal and the normal signal do not match, the sample (10) contains a harmful component.

Specifically, when a harmful component is included in the sample (10), the detection signal emitted through the sample (10) has a peak value at a specific wavelength. Accordingly, when the microcontroller (150) determines that the valid signal extracted from the detection signal has a peak value at the corresponding wavelength and thus is inconsistent with the normal signal, the communication unit (160) transmits result data indicating that the harmful component is included in the corresponding sample (10) to the user device.

FIG. 15 is a flowchart illustrating steps S440 and S450 of FIG. 14 in more detail. FIG. 15 will be described with reference to FIG. 5 and FIG. 14. In FIG. 15, it is assumed that the light source (130) includes only three channels, that is, the first and third channels (131-133). That is, since three wavelength bands are required for the analysis of a specific material, the light source (130) including three channels can be used. Accordingly, the light source (130) can provide the first to third optical signals having different wavelengths or different orthogonal codes to the sample (10) based on the first to third orthogonal codes.

The detector (140) can detect first to third detection signals (SP11, SP12, SP13) corresponding to first to third optical signals from the sample (10). The first to third detection signals (SP11, SP12, SP13) are signals appearing at specific wavelengths (W1, W2, W3), respectively. The first to third decoded detection signals (SP21, SP22, SP23) and the valid signal (SP30) are based on the first to third detection signals (SP11, SP12, SP13). In FIG. 15, the first to third detection signals (SP11, SP12, SP13), the first to third decoded detection signals (SP21, SP22, SP23), and the valid signal (SP30) can be expressed as a spectrum graph of intensity according to wavelength.

In steps S511 to S513, the decoder (154) may perform convolutions of the first to third detection signals (SP11, SP12, SP13) and the first to third orthogonal codes to decode the first to third detection signals (SP11, SP12, SP13) based on the first to third orthogonal codes. In steps S511 to S513, the decoder (154) may perform convolution for one detection signal among the first to third detection signals (SP11, SP12, SP13) with only one orthogonal code corresponding to one detection signal. For example, the decoder (154) can perform a first convolution of the first detection signal (SP11) and the first orthogonal code, the decoder (154) can perform a second convolution of the second detection signal (SP12) and the second orthogonal code, and the decoder (154) can perform a third convolution of the third detection signal (SP13) and the third orthogonal code.

The decoder (154) can generate first to third decoded detection signals (SP21, SP22, SP23) based on the first to third convolutions.

At step S520, the decoder (154) can obtain a valid signal (SP30) by adding the first to third decoded detection signals (SP21, SP22, SP23). Referring to FIG. 15, the valid signal (SP30) is a signal representing the intensity at the first to third wavelengths (W1, W2, W3).

Accordingly, the spectrometer (100) can determine whether a hazardous substance is included by comparing a normal signal and a valid signal only for the corresponding wavelengths (W1, W2, W3). That is, if the intensity of the valid signal is greater than the normal signal (has a peak value) at at least one of the first to third wavelengths (W1, W2, W3), the sample (10) can be determined to contain a hazardous component.

At this time, since the first to third wavelengths (W1, W2, W3) correspond to the wavelengths of the first to third optical signals, respectively, the effective signal (SP30) can have high reproducibility and accuracy.

Although embodiments of the present invention have been described herein with respect to methods of modulating a light source with orthogonal code signals optically, electrically, and mechanically, other modulation methods may be used.

The steps of a method or algorithm described in connection with the embodiments of the present invention may be implemented directly in hardware, implemented in a software module executed by hardware, or implemented by a combination of these. The software module may reside in a Random Access Memory (RAM), a Read Only Memory (ROM), an Erasable Programmable ROM (EPROM), an Electrically Erasable Programmable ROM (EEPROM), a Flash Memory, a hard disk, a removable disk, a CD-ROM, or any other form of computer-readable recording medium well known in the art to which the present invention pertains.

Above, while the embodiments of the present invention have been described with reference to the attached drawings, it will be understood by those skilled in the art that the present invention may be implemented in other specific forms without changing the technical idea or essential features thereof. Therefore, it should be understood that the embodiments described above are exemplary in all respects and not restrictive.

10 : Sample
100 : Spectrophotometer
110 : Housing
120 : Container
130 : Light source
131 : Channel 1
132 : Channel 2
133 : Third Channel
140 : Detector
141 : Array Sensor
150 : Microcontroller
152 : Encoder
154 : Decoder
160 : Communication Department

Claims (11)

a housing comprising an area attachable to a portable device; and
A container that holds a sample of a specific substance.
Including,
A light source that provides a light signal of a specific wavelength to the sample to determine whether the sample contains any harmful ingredients;
A detector for detecting a detection signal of the specific wavelength emitted from the sample,
A microcontroller that extracts a valid signal from the above detection signal, pre-stores a normal signal when the sample does not contain a harmful component, and compares the valid signal with the normal signal to determine whether the sample contains a harmful component.
Including at least one more of:
If the above sample contains a harmful component, the detection signal has a peak value at the specific wavelength,
The above microcontroller determines that the sample contains the harmful component if a peak value appears at a specific wavelength when comparing the normal signal and the valid signal.
Further comprising a communication unit for communicating with a user device,
The above communication unit transmits the result data to the user device when the microcontroller determines whether the sample contains a harmful component.
When the above communication unit receives sample information to be analyzed from the user device,
The above microcontroller determines the wavelength and number of light sources required to identify harmful substances based on the above sample information.
A spectroscopic device for analyzing a specific substance that is detachable from a portable device, characterized in that the area that can be coupled to the portable device included in the housing has the shape of an insertion protrusion and is physically and electrically coupled with the portable device when inserted into an earphone insertion port or a charging terminal insertion port of the portable device. In the first paragraph,
The above microcontroller,
An encoder that generates an orthogonal code and encodes the optical signal into a pattern corresponding to the orthogonal code; and
A spectroscopic device for analyzing a specific substance, which is detachable from a portable device and includes a decoder that shares the encoder and the orthogonal code and decodes the detection signal based on a correlation between the orthogonal code and the detection signal. In the second paragraph,
The above decoder is a spectroscopic device for analyzing a specific substance, which is detachable from a portable device and extracts a valid signal by removing noise included in the detection signal based on the orthogonal code. In the third paragraph,
A spectroscopic device for analyzing a specific substance that is detachable from a portable device, wherein the above orthogonal code is a binary sequence, and the pulse waveform of the optical signal is encoded by line encoding according to the above orthogonal code. delete delete In the first paragraph,
If the number of light sources is multiple,
Each optical signal provided by the above plurality of light sources is sequentially provided to the sample,
A spectroscopic device for analyzing a specific substance, which is detachable from a portable device, wherein the microcontroller encodes each of the optical signals into a pattern corresponding to a different orthogonal code. In Article 7,
If the number of light sources is multiple,
The above detector detects each detection signal emitted from the sample,
A spectroscopic device for analyzing a specific substance that is detachable from a portable device, wherein the microcontroller decodes each of the detection signals, adds up each of the decoded detection signals to obtain a valid signal, and compares the obtained valid signal with a normal signal. In the first paragraph,
A spectroscopic device for analysis of a specific substance, which is detachable from a portable device, wherein the above detection signal is generated by absorption, scattering, transmission or reflection of all or part of the above optical signal from the sample. In the first paragraph,
A spectroscopic device for analyzing a specific substance, which is detachable from a portable device and further includes a cover formed to be openable and connected to the top of the housing or the container to block light from the outside. In the first paragraph,
A spectroscopic device for analysis of a specific substance, which is detachable from a portable device, wherein the container is detachably formed in the housing.