KR102631683B1 - Portable spectroscope apparatus - Google Patents

Abstract

The present invention relates to a spectroscopic device, which includes at least one light emitting unit that provides an optical signal of infrared, visible, or ultraviolet wavelengths, and receives an optical signal irradiated from the light emitting unit and reflected or transmitted through the sample, and visible light. A light receiving unit using a photo diode capable of recognizing a light receiving unit, a detection unit detecting a detection signal from the optical signal received by the light receiving unit, and a light reflected by the sample or transmitted through the sample disposed in the space between the receiving unit where the sample is received and the light receiving unit. It includes a wavelength converter that converts the wavelength of the signal into the visible light region and a control unit that controls the light emitter by determining at least one emission condition among the wavelength, luminous intensity, emission timing, and emission period of the light to be emitted through the light emitter according to the sample. do.

Description

Portable spectroscope apparatus}

The present invention relates to portable spectroscopic devices.

Spectroscopic analysis is a method of non-destructively analyzing the components of a sample by identifying the optical properties of each wavelength band depending on the sample condition. In spectroscopic analysis, once a specific wavelength that can express the state of a sample is determined, it is easier to configure a component analysis system and easier to interpret the analysis results than other non-destructive testing methods.

Spectroscopic devices that analyze the components of substances using spectroscopic technology are applied to various fields such as food, medicine, manufacturing, beauty, etc. and are used to analyze substances.

Since these spectroscopic devices target a variety of substances rather than specific substances, they are designed and manufactured to investigate the entire wavelength band, making it difficult to reduce their size.

In order to design and manufacture a spectroscopic device in a portable size, the size of important components must be reduced or omitted, which is currently impossible, and the problem of increased noise due to size reduction is also difficult to solve.

Republic of Korea Patent Publication No. 10-2011-0102866, (2011.09.19)

The present invention to solve the problems described above includes a light emitting unit capable of emitting light of various wavelengths, through which conditions such as the wavelength of light, luminous intensity, emission timing, and emission period can be determined according to the sample to emit light. We would like to provide a spectroscopic device with

In addition, according to the present invention, it is intended to provide a spectroscopic device in which a wavelength converter converts the wavelength of an optical signal received by a light receiver.

In addition, according to the present invention, it is intended to provide a spectroscopic device that prevents measurement performance from being deteriorated even when the size of the spectroscopic device is reduced by determining emission conditions according to the sample and using noise removal technology.

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

A spectroscopic device according to an embodiment of the present invention for solving the above-described problems includes a light emitting unit that provides optical signals of infrared, visible, or ultraviolet wavelengths; A light receiving unit that receives an optical signal irradiated from the light emitting unit and reflected or transmitted through the sample, and uses a photo diode capable of recognizing visible light, a detection unit that detects a detection signal from the optical signal received by the light receiving unit, and the sample A wavelength converter disposed in the space between the receiving part and the light receiving part to convert the wavelength of the optical signal reflected by the sample or transmitted through the sample into the visible light range, and the wavelength and luminous intensity of the light to be emitted through the light emitting part depending on the sample. , and a control unit that controls the light emitting unit by determining at least one light emission condition of light emission timing and light emission period.

In addition, the light emitting unit may be a quantum dot, LED, tungsten lamp, or halogen lamp capable of providing optical signals of infrared, visible, or ultraviolet wavelengths.

In addition, an encoder that generates an orthogonal code and encodes the optical signal provided from the light emitting unit into a pattern corresponding to the orthogonal code, and a decoder that decodes the detection signal based on the correlation between the orthogonal code and the detection signal. More may be included.

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

In addition, when the noise included in the detection signal is greater than the threshold, the control unit analyzes the light emission conditions determined by the control unit and the characteristics of the noise included in the detection signal, resets the light emission conditions, and performs re-measurement of the sample. It is characterized by:

In addition, the wavelength conversion unit includes a first card that converts light in the ultraviolet range to the visible light range, and a second card that converts light in the infrared range into a visible range, and the control unit emits light from the light emitting unit. The first card or the second card is controlled to be positioned in front of the light receiving unit in consideration of the wavelength range of the optical signal.

In addition, the control unit is characterized in that it determines the light emission conditions in consideration of at least one of sample information input from the user's terminal and inspection purpose.

In addition, the light emitting unit includes a first light emitting unit that irradiates an optical signal that passes through the sample accommodated in the receiving unit, and the detection unit detects a detection signal from the optical signal that is radiated from the first light emitting unit and transmitted to the sample and received. It may include a first detection unit.

In addition, the light emitting unit includes a second light emitting unit that irradiates an optical signal to be reflected to the sample accommodated in the receiving unit, and the detection unit detects a detection signal from the optical signal irradiated from the second light emitting unit and reflected and received by the sample. It may include a second detection unit.

In addition, when performing the inspection of the sample, the control unit considers at least one of the sample information and the inspection purpose and sets the transmission inspection mode and the second light emitting unit and the second detection unit using the first light emitting unit and the first detection unit. It is characterized in that at least one inspection mode among the reflection inspection modes is selected and included in the light emission conditions.

In addition to this, another method for implementing the present invention, another system, and a computer-readable recording medium recording a computer program for executing the method may be further provided.

According to the present invention as described above, a spectroscopic device of compact size is provided by supporting the provision of optical signals of infrared, visible, and ultraviolet wavelengths from one light emitting unit, and converting the wavelength of the optical signal received by the light receiving unit to receive light. It has the effect of making it possible.

In addition, according to the present invention, by determining emission conditions according to the sample and using noise removal technology, measurement performance is not deteriorated even when the size of the spectroscopic device is reduced.

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.

1 is a block diagram of a spectroscopic device according to an embodiment of the present invention.
2 and 3 are internal cross-sectional views of a spectroscopic device according to an embodiment of the present invention as seen from the front.
Figure 3 is an internal cross-sectional view from above of a spectroscopic device according to an embodiment of the present invention.
FIG. 4 is a diagram illustrating the separation of the receiving portion in which the sample is accommodated in FIG. 2.
Figure 5 is a diagram illustrating a wavelength conversion unit in an embodiment of the present invention.
Figure 6 is a diagram illustrating the operation of the encoder and decoding module in an embodiment of the present invention.
Figure 7 is a diagram for explaining in more detail a spectroscopic device according to an embodiment of the present invention.
8 to 10 are block diagrams to explain in more detail the channels included in the light source according to an embodiment of the present invention.
Figure 11 is a flowchart showing a spectroscopic method according to an embodiment of the present invention.
FIG. 12 is a flowchart to explain the spectroscopy method of FIG. 10 in more detail in the time domain.
FIG. 13 is a flowchart to explain step S240 of FIG. 12 in more detail.
FIG. 14 is a flowchart to explain in more detail the spectroscopy method of FIG. 11 in the frequency domain.
FIG. 15 is a flowchart to explain step S340 of FIG. 14 in more detail.
Figure 16 is a flowchart of a spectroscopic method according to another embodiment of the present invention.
FIG. 17 is a flowchart illustrating steps S440 and S450 of FIG. 16 in more detail.

The advantages and features of the present invention and methods for achieving them will become clear by referring to the embodiments described in detail below along with the accompanying drawings. However, the present invention is not limited to the embodiments disclosed below and may be implemented in various different forms. The present embodiments are merely provided to ensure that the disclosure of the present invention is complete and to provide a general understanding of the technical field to which the present invention pertains. It is provided to fully inform the skilled person of the scope of the present invention, and the present invention is only defined by the scope of the claims.

The terminology used herein is for describing embodiments and is not intended to limit the invention. As used herein, singular forms also include plural forms, unless specifically stated otherwise in the context. As used in the specification, “comprises” and/or “comprising” does not exclude the presence or addition of one or more other elements in addition to the mentioned elements. Like reference numerals refer to like elements throughout the specification, and “and/or” includes each and every combination of one or more of the referenced elements. Although “first”, “second”, etc. are used to describe various components, these components are of course not limited by these terms. These terms are merely used to distinguish one component from another. Therefore, it goes without saying that the 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 meanings commonly understood by those skilled in the art to which the present invention pertains. Additionally, terms defined in commonly used dictionaries are not interpreted ideally or excessively unless clearly specifically defined.

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

Figure 1 is a block diagram of a spectroscopic device 10 according to an embodiment of the present invention.

2 and 3 are internal cross-sectional views of the spectroscopic device 10 according to an embodiment of the present invention as seen from the front.

Figure 3 is an internal cross-sectional view of the spectroscopic device 10 according to an embodiment of the present invention as seen from above.

FIG. 4 is a diagram illustrating that the receiving portion 70 in which the sample 30 is accommodated in FIG. 2 is separated.

Figure 5 is a diagram illustrating the wavelength converter 140 in an embodiment of the present invention.

Figure 6 is a diagram illustrating the operation of the encoder 160 and the decoding module in an embodiment of the present invention.

Referring to Figures 1 to 4, the spectroscopic device 10 according to an embodiment of the present invention includes a housing 50, a receiving part 70, a light emitting part 110, a light receiving part 120, a detection part 130, and a wavelength. It includes a conversion unit 140, a control unit 150, an encoder 160, and a decoder 170.

The housing 50 forms the exterior of the spectroscopic device 10 and forms a space in which other components of the spectroscopic device 10 are mounted.

Additionally, due to the characteristics of the spectroscopic device 10, the housing 50 is preferably formed so that light cannot pass through the housing 50 from the outside.

The receiving portion 70 is a space where the sample 30 to be tested is accommodated, and can be separated from the housing 50 to accommodate the sample 30 and then be mounted on the housing 50 again.

At this time, the sample 30 refers to an object to be analyzed and inspected using the spectroscopic device 10, and the sample 30 may be a specific material or a specific substance for analysis.

The sample 30 may absorb all or part of the optical signal provided (emitted) from the light source of the light emitting unit 110, or may transmit or reflect all or part of the optical signal.

As shown in FIG. 4, the receiving portion 70 is removable into and out of the housing 50, and is preferably made of a transparent material so that the optical signal emitted from the light emitting portion 110 can be transmitted.

Since the receiving part 70 may be contaminated by the sample 30 during the repeated measurement process, constant management is required to prevent this situation from occurring.

In addition, the spectroscopic device 10 may further include a cover that blocks light from the outside along with the receiving portion 70. At least one light emitting portion 110 may be configured, and may include infrared, visible, and ultraviolet rays. It is possible to provide (emission) optical signals in all wavelength ranges as shown.

More specifically, the light emitting unit 110 may be a quantum dot capable of providing optical signals of infrared, visible, or ultraviolet wavelengths, or an LED, tungsten lamp, or halogen lamp may be used, and the light emitting unit ( The optical signal provided from 110) follows the light emission conditions determined by the control unit 150.

The optical signal provided from the light emitting unit 110 is transmitted, reflected, and absorbed by the sample 30, and the spectroscopic device 10 according to an embodiment of the present invention receives the optical signal transmitted or reflected by the sample 30. A detection signal is detected.

The light receiving unit 120 receives an optical signal irradiated from the light emitting unit 110 and reflected or transmitted through the sample 30, and uses a photo diode capable of recognizing visible light.

The detection unit 130 detects a detection signal from the optical signal received by the light reception unit 120.

The wavelength converter 140 is disposed in the space between the receiving part 70, where the sample 30 is accommodated, and the light receiving part 120, and converts the wavelength of the optical signal reflected by the sample 30 or transmitted through the sample 30 into visible light. Convert to area.

More specifically, the wavelength converter 140 includes a first card 147 that converts light in the ultraviolet region to the visible light region and a second card 149 that converts light in the infrared region into a wavelength in the visible region. Includes.

The control unit 150 may control the wavelength converter 140 so that a part matching the wavelength of the current light emission condition is located on the front of the light receiving unit 120.

In detail, when an optical signal in the ultraviolet region is being emitted through the light emitting unit 110, the control unit 150 positions the first card 147 in front of the light receiving unit 120 so that it is transmitted or reflected to the sample 30. The optical signal can be converted to the visible light range.

As another example, when an optical signal in the infrared range is being emitted through the light emitting unit 110, the control unit 150 positions the second card 149 in front of the light receiving unit 120 to transmit or reflect the sample 30. The optical signal can be converted to the visible light range.

In the wavelength conversion unit 140, the area excluding the first card 147 and the second card 149 is formed as a blank area or is formed as a transparent card that does not change the wavelength range, so that the light emitting unit 110 When an optical signal in the visible light range is emitted, the control unit 150 can position the corresponding area in front of the light receiving unit 120.

In Figure 5, it is determined that an optical signal in the visible light wavelength range is currently being emitted from the light emitting unit 110, and the control unit 150 uses the light receiving unit 120 in areas other than the first card 147 and the second card 149. You can see that it is controlled to come to the front.

Additionally, in Figure 5, the wavelength converter 140 is illustrated as being implemented in a circular shape, but is not limited thereto.

In general, existing spectroscopic devices had to be equipped with various light emitting means to measure the sample 30 at various wavelengths, and also had to be equipped with measuring means for measuring each of these various wavelengths. And, due to these configurations, miniaturization of the spectroscopic device 10 was greatly limited.

However, the spectroscopic device 10 according to an embodiment of the present invention is capable of generating optical signals in various wavelength ranges through the light emitting unit 110 to which various light emitting means can be applied, and by using the wavelength converting unit 140. It has the advantage of enabling miniaturization by converting light-receiving signals in various wavelength ranges into wavelengths in the visible light range.

In addition to this, the present invention further includes features of the control unit 150 that determines light emission conditions and features that remove noise, thereby enabling miniaturization and performance improvement of the spectroscopic device 10.

In an embodiment of the present invention, the control unit 150 includes a spectroscopic device 10 such as a light emitting unit 110, a light receiving unit 120, a detection unit 130, a wavelength converting unit 140, an encoder 160, and a decoder 170. ) is responsible for controlling the configurations contained within.

The control unit 150 controls the light emitting unit 110 by determining at least one emission condition among the wavelength, luminous intensity, emission timing, and emission period of light to be emitted through the light emitting unit 110 according to the sample 30.

In an embodiment of the present invention, the control unit 150 is capable of selecting a transmission inspection mode and a reflection inspection mode.

More specifically, when performing an inspection of the sample 30, the control unit 150 considers at least one of the information of the sample 30 and the purpose of the inspection, and the first light emitting unit 113 and the first light receiving unit 123 At least one inspection mode among the transmission inspection mode using and the reflection inspection mode using the second light emitting unit 115 and the second light receiving unit 125 can be selected and included in the light emission conditions.

For example, the control unit 150 selects the transmission inspection mode when the sample 30 is suitable for the transmission inspection mode, and selects the reflection inspection mode when the sample 30 is suitable for the reflection inspection mode. If all modes must be used, both modes can be selected and included in the light emission conditions.

In one embodiment, the spectroscopy device 10 may perform a test mode in cases where sample information is not input in advance.

In detail, when the test mode is executed, the control unit 150 generates an optical signal with a wavelength corresponding to at least one of infrared, visible, and ultraviolet rays to the sample 30 accommodated in the receiving unit 120. The test mode is performed by controlling to provide sequentially.

For example, the control unit 150 may select a total of three wavelengths of infrared light, visible light, and ultraviolet light so that the light emitting unit 110 sequentially provides optical signals of three types of wavelengths, and a total of two wavelengths of visible light and ultraviolet light may be provided. You can select two wavelengths to have the light emitting unit 110 sequentially provide optical signals of two types of wavelengths, or you can select one wavelength to have the light emitting unit 110 provide optical signals of the corresponding wavelength. .

In addition, the control unit analyzes the optical signal received by the light receiving unit 120 according to the test mode and determines the emission wavelength of the light emitting unit based on the analysis result.

Above, it has been described that the control unit 150 analyzes the optical signal received by the light receiving unit 120 according to the test mode and determines the emission wavelength of the light emitting unit based on the analysis result, but the scope is not limited thereto, and the spectrometer 10 ) can also select/input the emission wavelength directly from the user.

In addition, although it is described above that the control unit 150 provides optical signals of infrared, visible, and ultraviolet wavelengths sequentially when performing the test mode, the order of the wavelengths of the optical signals is not limited and can be alternatively sequentially provided. If provided, they can be applied in any order.

The light emitting unit 110 includes a first light emitting unit 113 and a second light emitting unit 115, and the first light emitting unit 113 transmits an optical signal that transmits the sample 30 accommodated in the receiving unit 70. irradiates, and the second light emitting unit 115 irradiates an optical signal that is reflected to the sample 30 accommodated in the receiving unit 70.

The detection unit 130 detects a detection signal from the optical signal received by the light receiving unit 120, and one detection unit 130 can detect all optical signals received from the first light receiving unit 123 and the second light receiving unit 125. Alternatively, it may be divided into a first detection unit (not shown) and a second detection unit (not shown).

Additionally, the wavelength converter 140 includes a first wavelength converter 143 installed on the front of the first light receiver 123 and a second wavelength converter 145 installed on the front of the second light receiver 125.

In the drawing, the first light emitting unit 113 and the first light receiving unit 123, and the second light emitting unit 115 and the second light receiving unit 125 are shown as being formed together in one spectroscopic device 10, but it is necessary to Accordingly, it may be formed to include only one of the first light emitting unit 113 and the first light receiving unit 123 or the second light emitting unit 115 and the second light receiving unit 125.

In an embodiment of the present invention, the control unit 150 of the spectroscopic device 10 can receive information on the sample 30 and the purpose of inspection from the user's terminal, and use this to determine light emission conditions.

In this way, in order to receive information about the sample 30 and the inspection purpose from the user's terminal, the spectroscopic device 10 may further include a communication unit (not shown), and the communication unit may perform short-range communication or wireless communication with the server. This can be implemented to make this possible.

For example, the spectroscopic device 10 may be connected one-to-one with the user's terminal through short-distance communication (e.g., Bluetooth) through a communication unit to receive information on the sample 30 and the purpose of the inspection, and input the information from the server to the user's terminal. Information on the sample 30 and the purpose of testing may also be received.

Referring to FIG. 6, the operation of the encoder 160 and the decoding module in the embodiment of the present invention will be described.

The encoder 160 generates an orthogonal code and encodes the optical signal provided from the light emitting unit 110 into a pattern corresponding to the orthogonal code.

The decoder 170 decodes the detection signal based on the correlation between the orthogonal code and the detection signal, and extracts a valid signal by removing noise included in the detection signal based on the orthogonal code.

In one embodiment, when the noise included in the detection signal is greater than the threshold, the control unit 150 analyzes the light emission conditions determined by the control unit 150 and the characteristics of the noise included in the detection signal to reset the light emission conditions to produce the sample 30. A remeasurement can be performed.

The spectroscopic device 10 according to an embodiment of the present invention determines the light emission conditions according to the sample 30 and radiates at least one wavelength among various wavelengths to the sample 30, and is transmitted or reflected by the sample 30. The optical signal is converted into the visible light region by the wavelength converter 140, making it possible to detect the detection signal by one detection unit 130, and noise is reduced through the configuration of the encoder 160 and the decoder 170. is removed and a valid signal is extracted.

And, through the above configurations, the spectroscopic device 10 according to an embodiment of the present invention can be miniaturized without deteriorating performance.

Hereinafter, with reference to FIGS. 7 to 15, encoding of an optical signal using an orthogonal code and convolution of the same orthogonal code with a detection signal to extract a valid signal from the detection signal will be described in detail.

FIG. 7 is a diagram for explaining in more detail the spectroscopic device 10 for analysis of a specific substance according to an embodiment of the present invention.

FIG. 7 will be explained with reference to FIG. 6 . The encoder 160 may include a code generator (not shown). The light emitting unit 110 may include first to third channels (channel 1, channel 2, and channel 3). The detection unit 130 may include an array sensor 133. The decoder 170 may include a signal processor (not shown).

A code generator (not shown) can generate an orthogonal code for encoding an optical signal. An 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 pseudo-noise (PN) code or a gold code. An orthogonal code may be a binary sequence. A code generator (not shown) may generate a plurality of orthogonal codes. A code generator (not shown) can separate and output a plurality of orthogonal codes. A code generator (not shown) can output multiple orthogonal codes simultaneously.

The light emitting unit 110 includes one or more channels. The number of channels included in the light emitting unit 110 may be determined depending on the wavelength required to analyze the sample 30. That is, when one wavelength is used to analyze a specific sample 30, the light emitting unit 110 may include one channel, and when three wavelengths are used to analyze a specific sample 30, the light emitting unit 110 ( 110) may include three channels.

The first channel may output an optical signal toward the sample 30. Before outputting the optical signal, the first channel may determine the wavelength of the optical signal. The first channel may output an optical signal having a determined wavelength. The wavelengths of optical signals output by the first to third channels are different from each other.

In one embodiment, the first channel 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 may be modulated into a first optical signal through the first channel. The first channel may encode the first optical signal with a pattern corresponding to the first orthogonal code. The first channel may encode the pulse waveform of the first optical signal into a pattern corresponding to the binary sequence of the first orthogonal code. The first channel may encode the pulse waveform of the first optical signal by line coding according to the first orthogonal code.

Referring to FIG. 7, for example, when the first orthogonal code is a binary sequence of 1110100, the size of the pulse waveform of the first optical signal may sequentially correspond to the bit values of the first orthogonal code.

The second and third channels may be implemented by the same principle as the first channel, and like the first channel, the second and third channels may be implemented by a second orthogonal code (e.g., 1001011) by the same principle as the first channel. ) and the second orthogonal code (eg, 1101011) can be used to encode the second and third optical signals.

That is, the second and third orthogonal codes can be modulated into second and third optical signals through second and third channels, respectively. In FIG. 7 , only the first to third channels are shown, but the number of channels included in the light emitting unit 110 is not limited to three.

The array sensor 133 may detect or receive a detection signal from the sample 30. The array sensor 133 may detect a plurality of detection signals. Here, each of the plurality of detection signals may correspond to first to third channels. The array sensor 133 may include a plurality of pixels, and the plurality of pixels may each correspond to a plurality of detection signals. The array sensor 133 may receive a plurality of detection signals simultaneously or sequentially.

A signal processor (not shown) may receive a detection signal from the detection unit 130 and extract a valid signal from the detection signal. A signal processor (not shown) may receive a plurality of detection signals and obtain a valid signal based on the plurality of detection signals.

A signal processor (not shown) may synchronize a code generator (not shown) and a plurality of orthogonal codes. A signal processor (not shown) may receive data and signals containing information about an orthogonal code from a code generator (not shown).

A signal processor (not shown) may share an orthogonal code with a code generator (not shown). A signal processor (not shown) may receive a plurality of detection signals respectively corresponding to a plurality of orthogonal codes from the array sensor 133 and extract a valid signal from the plurality of detection signals based on the plurality of orthogonal codes. You can.

In one embodiment, a signal processor (not shown) may receive a detection signal corresponding to a first orthogonal code among a plurality of orthogonal codes.

A signal processor (not shown) may obtain an operation result based on the correlation between the first orthogonal code and the detection signal corresponding to the first orthogonal code.

Iteratively, a signal processor (not shown) may obtain a plurality of calculation results based on correlation from a plurality of orthogonal codes and a plurality of detection signals. A signal processor (not shown) may obtain a valid signal by summing the results of a plurality of operations.

FIGS. 8 to 10 are block diagrams to explain in more detail the channels included in the light emitting unit 110 of FIG. 7 according to an embodiment of the present invention.

Referring to FIG. 8, the channel may include a driver 111 and an optical signal generator 112. The channel may be substantially the same as the first to third channels in FIG. 7. FIG. 8 will be explained with reference to FIG. 7 .

The driver 111 may be a device for generating an optical signal using an electrical modulation method. The driver 111 may generate a driving signal based on an orthogonal code received from a code generator (not shown) by channel. The driving signal may include information about the orthogonal code. The driving signal may be an electrical control signal.

The optical signal generator 112 may generate an optical signal provided as the sample 30. The optical signal generator 112 may generate an optical signal along with the encoding process. The optical signal generator 112 may be implemented with various devices including LEDs, laser diodes, etc.

The driver 111 may transmit a driving signal to the optical signal generator 112, and the optical signal generator 112 may receive the driving signal. The optical signal generator 112 may be controlled by a driving signal. The optical signal generator 112 may generate an optical signal encoded in a pattern corresponding to an orthogonal code based on a driving signal including an orthogonal code.

Referring to FIG. 9, the channel may include a continuous wave generator 116 and an optical modulator 117. The channel may be substantially the same as the first to third channels in FIG. 7. FIG. 9 will be explained with reference to FIG. 7 .

The continuous wave generator 116 can output light in a continuous waveform. Here, the continuous waveform may be various waveforms including sinusoidal waves and square waves. Before outputting the continuous wave, the continuous wave generator 116 may determine the wavelength, phase, and amplitude of the continuous wave.

The optical modulator 117 may be a device for generating an optical signal by an optical modulation method. Optical modulator 117 may be operated depending on the operating voltage. The operating voltage of optical modulator 117 can be adjusted according to the orthogonal code received by the channel from a code generator (not shown). The optical modulator 117 can modulate the phase and amplitude of light according to the operating voltage.

The continuous wave generator 116 may output a continuous wave toward the optical modulator 117. Continuous wave generator 116 may provide a continuous wave to optical modulator 117 and optical modulator 117 may modulate the amplitude and phase of the continuous wave. Optical modulator 117 may modulate the amplitude and phase of the continuous wave based on an orthogonal code received by the channel from a code generator (not shown). The optical modulator 117 can generate an optical signal encoded in a pattern corresponding to the orthogonal code by modulating the amplitude and phase of the continuous wave according to the orthogonal code. The operating voltage of the optical modulator 117 can be adjusted by an orthogonal code. The optical modulator 117 may modulate a continuous wave into an optical signal encoded in a pattern corresponding to an orthogonal code based on the adjusted operating voltage.

Referring to FIG. 10, the channel may include a continuous wave generator 116, at least one slit 118, and a slit controller 119. The channel may be substantially the same as the first to third channels in FIG. 7. FIG. 10 will be explained with reference to FIGS. 7 and 9 .

The continuous wave generator 116 may be substantially the same as the continuous wave generator 116 of FIG. 9 . Accordingly, detailed description of the continuous wave generator 116 in FIG. 10 is omitted.

At least one slit 118 may transmit the continuous wave output from the continuous wave generator 116. At least one slit 118 can adjust the transmittance of continuous waves. At least one slit 118 may diffract transmitted continuous waves.

The slit controller 119 may generate a control signal to control at least one slit 118 . The control signal of the slit controller 119 may be generated based on an orthogonal code received by the channel from a code generator (not shown). The slit controller 119 may transmit a control signal to at least one slit 118 .

In one embodiment, slit controller 119 can transmit a control signal to at least one slit 118 and at least one slit 118 can receive a control signal. The slit controller 119 may control the opening and closing operation of at least one slit 118 by a control signal. The slit controller 119 may adjust the opening and closing operation of at least one slit 118 to be identical to the pattern corresponding to the orthogonal code. At least one slit 118 may modulate a continuous wave into an optical signal encoded in a pattern corresponding to an orthogonal code based on an opening and closing operation in response to a control signal.

Figure 11 is a flowchart showing a spectroscopic method according to an embodiment of the present invention, and will be described with reference to Figure 6.

In step S110, the light emitting unit 110 may 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 emitting unit 110 may perform convolution of an orthogonal code (OC) and a continuous wave signal (CW). The light emitting unit 110 may generate an optical signal (ENC) based on the result of convolution.

However, it is not limited to this, and in some embodiments, the light emitting unit 110 may generate an orthogonal code (OC) and a coded discontinuous wave, and perform convolution of the orthogonal code (OC) and the coded discontinuous wave, The light emitting unit 110 may generate an optical signal (ENC) based on the result of convolution.

In step S120, the light emitting unit 110 may provide an optical signal (ENC) to the sample 30. In step S130, the detector 130 may detect the detection signal DET from the sample 30. All or part of the optical signal (ENC) may be absorbed, transmitted, scattered, and reflected in the sample 30. The detection signal (DET) may be a result of the absorbed, transmitted, scattered, and reflected optical signal (ENC) in the sample 30. Additionally, the detection signal DET may be a deformation of the optical signal ENC. The detection signal (DET) may include an effective signal (EFF) and noise for analysis of the sample 30. The detection signal (DET) itself may not be useful for analysis of sample 30. For example, the detection signal DET may not itself determine the chemical composition of the sample 30 (eg, molecular structure, molecular change, and molecular weight, etc.).

In step S140, the decoder 170 may extract an effective signal (EFF) by removing noise from the detection signal (DET). The decoder 170 may decode the detection signal (DET). The decoder 170 may perform convolution of the orthogonal code (OC) received from the encoder 160 and the detection signal (DET). The decoder 170 may obtain an effective signal (EFF) based on the result of convolution. The effective signal (EFF) may have high accuracy for analysis of the sample 30. The spectroscopic device 10 may determine the chemical composition (eg, molecular structure, molecular change, and molecular weight, etc.) of the sample 30 based on the effective signal (EFF).

FIG. 12 is a flowchart to explain the spectroscopy method of FIG. 11 in more detail in the time domain. FIG. 12 will be explained with reference to FIGS. 6 and 11 . Step S210 may correspond to step S110 of FIG. 11, step S220 may correspond to step S120 of FIG. 11, step S230 may correspond to step S130 of FIG. 11, and step S240 may correspond to step S140 of FIG. 11. there is. Referring to FIG. 12, the continuous wave signal (T10), the optical signal (T20), the detection signal (T30), and the effective signal (T40) can be expressed as a size graph over time.

In addition, when expressed graphically as above, it is not limited to the continuous wave signal T10, and a coded discontinuous wave may be applied in addition to the continuous wave signal T10 as described above.

In step S210, the light emitting unit 110 may encode the continuous wave signal T10 into an optical signal T20. The continuous wave signal T10 may correspond to the continuous wave signal CW of FIG. 11, and the optical signal T20 may correspond to the optical signal ENC of FIG. 11. The encoder 160 can match the timing of the light emitting unit 110 by clock synchronization. The encoder 160 may provide an orthogonal code (OC) to the light emitting unit 110 based on timing.

The light emitting unit 110 may generate an optical signal T20 encoded with a pattern corresponding to the orthogonal code OC from the continuous wave signal T10 based on timing synchronized with the encoder 160. The light emitting unit 110 may perform convolution of the orthogonal code (OC) and the continuous wave signal (T10) based on timing synchronized with the encoder (160). The light emitting unit 110 may generate an optical signal T20 based on the result of convolution.

In step S220, the light emitting unit 110 may provide an optical signal T20 to the sample 30. In step S230, the detector 130 may detect the detection signal T30 from the sample 30. The detection signal T30 may correspond to the detection signal DET of FIG. 11 . The optical signal T20 from the sample 30 may cause molecular vibration of the sample 30 over time. Based on the molecular vibration of the sample 30, detection signals T30 such as absorption, scattering, transmission, and reflection may be emitted from the sample 30.

In step S240, the decoder 170 may extract a valid signal T40 from the detection signal T30. The effective signal T40 may correspond to the effective signal EFF in FIG. 11. The decoder 170 can match its timing with the encoder 160 through clock synchronization. The decoder 170 may receive an orthogonal code (OC) from the encoder 160 based on timing. The decoder 170 may perform convolution of the orthogonal code (OC) and the detection signal (T30) based on timing synchronized with the encoder (160). The decoder 170 may obtain the effective signal T40 based on the result of convolution. The signal-to-noise ratio (SNR) of the effective signal (T40) can be improved.

FIG. 13 is a flowchart to explain step S240 of FIG. 12 in more detail. FIG. 13 will be explained with reference to FIGS. 6 and 12 .

The detection signal T30 may include an active component (T31) and a noise component (T32). The active ingredient (T31) may be generated from molecular vibrations of the sample (30) over time. Noise component T32 may be generated from factors other than molecular vibrations of sample 30 over time. In Figure 13, the active component (T31) and the noise component (T32) are separated, but in one embodiment of the present invention, the active component (T31) and the noise component (T32) may not be separated from the detection signal (T30). there is.

In step S241, the decoder 170 may perform convolution of the orthogonal code (OC) received from the encoder 160 and the effective component (T31) based on timing synchronized with the encoder 160. The correlation value between the orthogonal code (OC) and the active ingredient (T31) can be 1. Accordingly, the active ingredient (T31) can be converted into the decrypted active ingredient (T41). Here, the decoded active component (T41) may be in a state corresponding to the optical signal (T20) before being modulated or encoded. That is, the active ingredient (T31) can be restored by the orthogonal code (OC).

In step S242, the decoder 170 may perform convolution of the orthogonal code (OC) received from the encoder 160 and the noise component (T32) based on timing synchronized with the encoder 160. The noise component (T32) and the effective component (T31) may be convolved with the same orthogonal code (OC). The correlation value between the orthogonal code (OC) and the noise component (T32) may be 0. Accordingly, the noise component (T32) can be converted into the decoded noise component (T42). Here, the decoded noise component (T42) may be a signal in which noise is weakened or some or all of the noise is removed by an orthogonal code (OC). Ultimately, the effective signal T40 may include a decoded active component T41 and a decoded noise component T42. The signal-to-noise ratio of the effective signal T40 can be improved.

FIG. 14 is a flowchart for explaining the spectroscopy method of FIG. 11 in more detail in the frequency domain, and will be described with reference to FIGS. 7 and 11 . Step S310 may correspond to step S110 of FIG. 11, step S320 may correspond to step S120 of FIG. 11, step S330 may correspond to step S130 of FIG. 11, and step S340 may correspond to step S140 of FIG. 11. there is. Referring to FIG. 14, the continuous wave signal (F10), the optical signal (F20), the detection signal (F30), and the effective signal (F40) can be expressed as a spectrum graph of intensity according to wavelength.

In step S310, the light emitting unit 110 may encode the continuous wave signal F10 into an optical signal F20. The continuous wave signal F10 may correspond to the continuous wave signal CW of FIG. 11, and the optical signal F20 may correspond to the optical signal ENC of FIG. 11. The encoder 160 may provide the light emitting unit 110 with an orthogonal code (OC) that spreads the bandwidth. The light emitting unit 110 may perform convolution of the orthogonal code (OC) and the continuous wave signal (F10). Due to spectrum-spreading and convolution, the bandwidth of the optical signal (F20) may be wider than that of the continuous wave signal (F10). The light emitting unit 110 may generate an optical signal F20 spread by an orthogonal code (OC) based on the result of convolution. The energy of the optical signal F20 may be the same as the energy of the continuous wave signal F10.

In step S320, the light emitting unit 110 may provide an optical signal F20 to the sample 30. In step S330, the detector 130 may detect the detection signal F30 from the sample 30. The detection signal F30 may correspond to the detection signal DET of FIG. 11 . The sample 30 can absorb, scatter, transmit, and reflect the optical signal F20 in a specific wavelength range. Molecular vibration of the sample 30 may occur due to the optical signal F20. Detection signals F30 such as absorption, scattering, and transmission may be emitted from the sample 30 based on the molecular vibration of the sample 30 for a specific wavelength range.

In step S340, the decoder 170 may extract the valid signal F40 from the detection signal F30. The effective signal F40 may correspond to the effective signal EFF in FIG. 11. The decoder 170 may perform convolution of the orthogonal code (OC) received from the encoder 160 and the detection signal (F30). By spectrum-despreading and convolution, the bandwidth of the detection signal F30 can be restored. The decoder 170 may obtain the effective signal F40 from the detection signal F30 based on the result of convolution.

FIG. 15 is a flowchart for explaining step S340 of FIG. 14 in more detail, and FIG. 15 will be described with reference to FIGS. 7 and 11.

As in the time domain, the detection signal F30 may include an active component (F31) and a noise component (F32). The active ingredient (F31) may be generated from the molecular vibration of the sample (30) for all or part of the wavelength range of the optical signal (F20). The noise component F32 may be generated from factors other than the molecular vibration of the sample 30 for all or part of the wavelength range of the optical signal F20. In Figure 15, the active component (F31) and the noise component (F32) are separated, but in one embodiment of the present invention, the active component (F31) and the noise component (F32) may not be separated from the detection signal (F30). there is.

In step S341, the decoder 170 may perform convolution of the orthogonal code (OC) received from the encoder 160 and the effective component (F31). The correlation value between the orthogonal code (OC) and the active ingredient (F31) can be 1. Accordingly, the active ingredient (F31) can be converted into the decrypted active ingredient (F41). Here, the decoded active component (F41) may be in a state corresponding to the optical signal (F20) before being modulated or encoded. That is, the active ingredient (F31) can be restored by the orthogonal code (OC).

In step S342, the decoder 170 may perform convolution of the orthogonal code (OC) received from the encoder 160 and the noise component (F32) based on timing synchronized with the encoder 160. The noise component (F32) and the effective component (F31) may be convolved with the same orthogonal code (OC). The correlation value between the orthogonal code (OC) and the noise component (F32) can be 0. Accordingly, the noise component (F32) can be converted into the decoded noise component (F42). Here, the decoded noise component (F42) may be a signal in which noise is weakened or some or all of the noise is removed by an orthogonal code (OC). Ultimately, the effective signal (F40) may include a decoded active component (F41) and a decoded noise component (F42). The signal-to-noise ratio of the effective signal (F40) can be improved.

Figure 16 is a flowchart of a spectroscopic method for analysis of a specific substance according to another embodiment of the present invention, and will be explained with reference to Figure 7.

The following steps (S410 to S460) of the spectroscopic method for analysis of a specific substance of the present invention are performed by the spectroscopic device 10. Since a specific material is predetermined as the sample 30, the light emission conditions of the light emitting unit 110 used to perform the spectroscopic method may be performed according to the light emission conditions determined by the control unit 150.

In step S410, the light emitting unit 110 may generate one or more optical signals based on one or more orthogonal codes. A code generator (not shown) may generate one or more orthogonal codes. One or more orthogonal codes may all be different from each other or may all be identical to 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, cross-correlation values between one or more different orthogonal codes may be 0. A code generator (not shown) may provide an orthogonal code to each of the plurality of channels included in the light emitting unit 110. Each of one or more orthogonal codes generated by a code generator (not shown) may correspond one-to-one to each of one or more channels.

In step S420, the light emitting unit 110 may provide the sample 30 with one or more optical signals generated based on one or more orthogonal codes received from a code generator (not shown). Each of the one or more channels may generate an optical signal encoded with a pattern corresponding to an orthogonal code received from a code generator (not shown). Each of one or more channels included in the light emitting unit 110 may output an optical signal toward the sample 30. The wavelengths of one or more optical signals may be different from each other.

In step S430, the detector 130 may detect one or more detection signals respectively corresponding to one or more optical signals from the sample 30. One or more optical signals output from the light emitting unit 110 toward the sample 30 may be absorbed, transmitted, scattered, and reflected by the sample 30. Sample 30 may emit one or more detection signals based on one or more optical signals absorbed, transmitted, scattered, and reflected by sample 30 . One or more detection signals may be modifications of one or more optical signals. The detection unit 130 may receive one or more detection signals simultaneously or sequentially.

In step S440, the decoder 170 may perform convolution of one or more detection signals and one or more orthogonal codes. The decoder 170 may perform convolution on one of the one or more detection signals and all of one or more orthogonal codes. Iteratively, decoder 170 may perform convolutions on all of one or more orthogonal codes and one or more detection signals. Alternatively, the decoder 170 may perform convolution on one detection signal among one or more detection signals with only one orthogonal code corresponding to one detection signal. Decoder 170 can perform convolutions multiple times and can perform convolutions simultaneously or sequentially. The decoder 170 may obtain the result of convolution for one or more orthogonal codes and one or more detection signals.

In step S450, the decoder 170 may obtain a valid signal based on the results of convolutions.

When there are multiple orthogonal codes and detection signals (when there are multiple light emitting units 110), the decoder 170 obtains a valid signal by adding up the results of convolutions for the multiple orthogonal codes and multiple detection signals. can do. Obtaining an effective signal by summing the results of convolutions for a plurality of orthogonal codes and a plurality of detection signals will be explained in more detail in FIG. 17.

In step S460, the microcontroller checks whether the sample 30 contains harmful ingredients by comparing the valid signal and the normal signal.

The normal signal is a signal indicating when the sample 30 is in a normal state, that is, it does not contain harmful components. Therefore, by comparing the valid signal obtained through analysis of the sample 30 with the previously stored normal signal, if the valid signal and the normal signal do not match, the sample 30 contains harmful components.

Specifically, when the sample 30 contains harmful ingredients, the detection signal emitted through the sample 30 has a peak value at a specific wavelength. Therefore, if the microcontroller determines that the valid signal extracted from the detection signal has a peak value at the corresponding wavelength and does not match the normal signal, the communication unit transmits the result data indicating that the sample 30 contains harmful components to the user device. .

FIG. 17 is a flowchart illustrating steps S440 and S450 of FIG. 16 in more detail, and will be described with reference to FIGS. 7 and 16. In Figure 17, it is assumed that the light emitting unit 110 includes only three channels, that is, first and third channels. That is, since three wavelength bands are required for analysis of a specific material, a light source including three channels can be used. Accordingly, the light emitting unit 110 may provide the sample 30 with first to third optical signals having different wavelengths or different orthogonal codes based on the first to third orthogonal codes.

The detector 130 may detect first to third detection signals SP11, SP12, and SP13 corresponding to the first to third optical signals from the sample 30. The first to third detection signals SP11, SP12, and SP13 are signals that appear at specific wavelengths W1, W2, and W3, respectively. The first to third decoded detection signals SP21, SP22, and SP23 and the valid signal SP30 are based on the first to third detection signals SP11, SP12, and SP13. In Figure 17, the first to third detection signals (SP11, SP12, SP13), the first to third decoded detection signals (SP21, SP22, SP23), and the effective signal (SP30) have intensities according to wavelength. It can be expressed as a spectrum graph.

In steps S511 to S513, the decoder 170 uses the first to third detection signals SP11, SP12, and SP13 to decode the first to third detection signals SP11, SP12, and SP13 based on the first to third orthogonal codes. Convolutions of (SP11, SP12, SP13) and the first to third orthogonal codes can be performed. In steps S511 to S513, the decoder 170 performs convolution of one of the first to third detection signals SP11, SP12, and SP13 with only one orthogonal code corresponding to one detection signal. It can also be done. For example, the decoder 170 may perform a first convolution of the first detection signal SP11 and the first orthogonal code, and the decoder 170 may perform the first convolution of the second detection signal SP12 and the second orthogonal code. A second convolution may be performed, and the decoder 170 may perform a third convolution of the third detection signal SP13 and the third orthogonal code.

The decoder 170 may generate first to third decoded detection signals SP21, SP22, and SP23 based on the first to third convolutions.

In step S520, the decoder 170 may obtain a valid signal SP30 by adding the first to third decoded detection signals SP21, SP22, and SP23. Referring to FIG. 17, the effective signal SP30 is a signal indicating the intensity at the first to third wavelengths W1, W2, and W3.

Accordingly, the spectroscopic device 10 can determine whether hazardous substances are included by comparing a normal signal and a valid signal only for the corresponding wavelengths W1, W2, and W3. That is, if the strength of the effective signal is greater (having a peak value) than the normal signal at at least one of the first to third wavelengths (W1, W2, W3), the sample 30 contains harmful components. It can be judged to be included.

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

Although embodiments of the present invention have been described herein with respect to a method of optically, electrically, and mechanically modulating the light emitting unit 110 with an orthogonal code signal, other modulation methods may be used.

Above, embodiments of the present invention have been described with reference to the attached drawings, but those skilled in the art will understand that the present invention can be implemented in other specific forms without changing its technical idea or essential features. You will be able to understand it. Therefore, the embodiments described above should be understood in all respects as illustrative and not restrictive.

10: Spectroscopic device
30: sample 50: housing
70: receiving part 110: light emitting part
111: driver 112: optical signal generator
113: first light emitting part 115: second light emitting part
116: continuous wave generator 117: optical modulator
118: slit 119: slit controller
120: light receiving unit 123: first light receiving unit
125: second light receiving unit 130: detecting unit
133: Array sensor 140: Wavelength converter
143: first wavelength converter 145: second wavelength converter
147: 1st card 149: 2nd card
150: Control unit 160: Encoder
170: Decryptor

Claims (11)

At least one light emitting unit that provides optical signals of infrared, visible, or ultraviolet wavelengths;
A light receiving unit that receives an optical signal irradiated from the light emitting unit and reflected or transmitted through the sample, and uses a photo diode capable of recognizing visible light;
a detection unit that detects a detection signal from the optical signal received by the light reception unit;
a wavelength converter disposed in a space between the receiving part where the sample is accommodated and the light receiving part, and converting the wavelength of the optical signal reflected by or transmitted through the sample into the visible light range;
a control unit that determines light emission conditions based on information about the sample and an inspection purpose, and controls the light emitting unit based on the determined light emission conditions;
an encoder that generates an orthogonal code and encodes the optical signal provided from the light emitting unit into a pattern corresponding to the orthogonal code; and
A decoder that decodes the detection signal based on the correlation between the orthogonal code and the detection signal,
The light emission conditions include at least one of the wavelength of light to be emitted through the light emitting unit, luminous intensity, light emission timing, and light emission period,
The control unit,
Extracting a valid signal by removing noise included in the detection signal based on the orthogonal code,
When the noise included in the detection signal is greater than a preset threshold, the determined light emission conditions and characteristics of the noise included in the detection signal are analyzed, the light emission conditions are reset based on the analysis results, and the reset Re-measure the sample based on the luminescence conditions,
When there are a plurality of orthogonal codes and detection signals, the effective signal is obtained by adding up convolution results for the plurality of orthogonal codes and the plurality of detection signals through the decoder,
Comparing the obtained valid signal with a previously stored normal signal and checking whether the sample contains harmful ingredients based on the comparison result,
Spectroscopic device.
According to paragraph 1,
The light emitting unit is characterized in that quantum dots, LEDs, tungsten lamps, or halogen lamps capable of providing optical signals of infrared, visible, or ultraviolet wavelengths are applicable.
Spectroscopic device.
delete According to paragraph 1,
The decoder extracts a valid signal by removing noise included in the detection signal based on the orthogonal code,
Spectroscopic device.
delete According to paragraph 1,
The wavelength converter includes a first card that converts light in the ultraviolet region to the visible light region, and a second card that converts light in the infrared region to a wavelength in the visible region,
The control unit controls the first card or the second card to be positioned in front of the light receiving unit in consideration of the wavelength range of the optical signal emitted from the light emitting unit.
Spectroscopic device.
delete According to paragraph 1,
The control unit,
Performing a test mode by controlling the light emitting unit to sequentially provide optical signals corresponding to at least one wavelength of infrared, visible, and ultraviolet rays to the sample accommodated in the receiving unit,
Characterized in determining the emission wavelength of the light emitting unit based on the analysis result of the optical signal received by the light receiving unit according to the test mode,
Spectroscopic device.
According to paragraph 1,
The light emitting unit includes a first light emitting unit that irradiates an optical signal that transmits a sample accommodated in the receiving unit,
The detection unit includes a first detection unit that detects a detection signal from an optical signal irradiated from the first light emitting unit, transmitted to the sample, and received.
Spectroscopic device.
According to claim 1 or 9,
The light emitting unit includes a second light emitting unit that irradiates an optical signal to be reflected to the sample accommodated in the receiving unit,
The detection unit includes a second detection unit that detects a detection signal from an optical signal irradiated from the second light emitting unit and reflected and received by the sample.
Spectroscopic device.
According to clause 10,
When performing the inspection of the sample, the control unit considers at least one of sample information and inspection purpose, and operates in a transmission inspection mode using the first light emitting unit and the first detection unit and a transmission inspection mode using the second light emitting unit and the second detection unit. Characterized in that at least one inspection mode among the reflection inspection modes is selected and included in the light emission conditions,
Spectroscopic device.

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