KR102574684B1 - Method for cancelling sun light noise and optical sensing device using the same - Google Patents

Abstract

A solar noise removal method and an optical sensing device using the same are provided. The optical sensing device measures the sunlight signal during a period of not transmitting the light signal, converts the measured sunlight signal into digital data, and stores the sunlight data. Thereafter, an optical signal transmission is performed and a signal received according to the transmission of the optical signal is measured, and at this time, the stored sunlight data is converted into an analog signal to restore the sunlight signal. Then, an optical reception signal received by transmitting an optical signal is acquired based on the measured total received signal and the restored sunlight signal.

Description

Method for canceling sun light noise and optical sensing device using the same {Method for canceling sun light noise and optical sensing device using the same}

The present invention relates to noise removal, and more particularly, to a method for removing noise from sunlight during optical sensing and an optical sensing device using the same.

In various industrial fields, measurement or detection using light or similar physical means is being performed. An optical sensor using light can be applied to measurement of displacement, distance or thickness, and for example, a method using light travel time, a method using optical phase difference, or a method using interference phenomena are applied to measure distance by light. .

When measuring using light, a transmitter for outputting an optical signal to a measurement object and a receiver for receiving an optical signal reflected from the measurement object are used.

When receiving an optical signal from various types of optical detectors, such as an integrated transmission and reception unit in which a transmitter and a receiver are integrated, when a sunlight signal comes in, the light received signal by the signal transmitted from the optical detector and the sunlight signal are combined to accurately distinguish the signal. this is not done

Accordingly, in order to distinguish sunlight signals in an optical detector, additional expensive hardware components such as an optical filter and an additional photodiode are required.

As related prior literature, there is a "LiDAR device, LIDAR signal processing device and method" described in Korean Patent No. 2086026.

The problem to be solved by the present invention is to provide a method for removing sunlight noise by accurately distinguishing a sunlight signal from an optical signal to be received during optical sensing, and an optical sensing device using the same.

According to an embodiment, a method for removing sunlight noise in an optical sensing device is provided. The method may include measuring a solar light signal during a period in which the optical sensing device does not transmit an optical signal; converting, by the optical sensing device, the measured sunlight signal into digital sunlight data, and storing the converted sunlight data; performing, by the optical sensing device, optical signal transmission; measuring, by the optical sensing device, a signal received according to transmission of the optical signal; Restoring, by the optical sensing device, a sunlight signal by converting the stored sunlight data into an analog signal; and obtaining, by the optical sensing device, an optical reception signal received by the transmission of the optical signal based on the measured total received signal and the restored sunlight signal.

In an embodiment, the measuring of the solar signal may be performed in a state in which the optical sensing device does not output a transmission trigger signal to the transmitter.

In one embodiment, the transmitting of the optical signal may include transmitting the optical signal in a state in which the optical sensing device outputs a transmission trigger signal to a transmitting unit, and the restoring of the sunlight signal may include transmitting the trigger signal to the transmitting unit. The sunlight signal may be restored during the signal output period.

In an implementation example, in the obtaining of the optical reception signal received by transmitting the optical signal, the optical reception signal may be obtained by differentially amplifying the entire received signal and the restored sunlight signal.

According to another embodiment, an optical sensing device is provided. The optical sensing device includes a transmitting unit configured to transmit an optical signal; a receiver configured to perform optical signal reception; and a control unit configured to control transmission of the optical signal and reception of the optical signal, wherein the control unit measures the solar signal in a period when the optical signal is not transmitted, and converts the measured solar signal into a digital signal. Converting and storing sunlight data, performing optical signal transmission to measure a signal received according to the transmission of the optical signal, converting the stored sunlight data into an analog signal to restore the sunlight signal, and restoring the measured signal An optical reception signal received by transmitting the optical signal may be obtained based on the entire phosphorus received signal and the restored sunlight signal.

In one embodiment, the control unit measures the sunlight signal in a state of not outputting a transmission trigger signal to the transmission unit, and transmits the optical signal in a state in which the optical sensing device outputs a transmission trigger signal to the transmission unit. And, it may be configured to restore the sunlight signal during the period in which the transmission trigger signal is output.

In one embodiment, the control unit may include: a control unit configured to control an optical signal transmission operation of the transmitter and an optical signal reception operation of the receiver, and measure a solar light signal; a first signal converting unit configured to convert a signal output from the receiving unit into a digital signal and transmit the converted digital signal to the control unit when the solar signal is measured; a second signal converter configured to convert the signal provided from the control unit into an analog signal and output the analog signal; and a differential amplifier configured to differentially amplify and output a signal output from the receiver and a signal output from the second signal conversion unit.

In one embodiment, the control unit stores the digital signal transmitted from the first signal converter as sunlight data when measuring the sunlight signal, and converts the sunlight data into the second signal during an optical signal transmission operation of the transmitter. It may be configured to provide to the signal conversion unit.

In one embodiment, a signal input to the first input terminal of the differential amplifier is a total received signal that is a signal output from the receiver, and the total received signal is a solar light signal and an optical received signal received by transmitting the optical signal. , and a signal input to the second input terminal of the differential amplifier may be the restored sunlight signal.

According to an embodiment of the present invention, it is possible to effectively remove sunlight noise by accurately distinguishing a sunlight signal from a received light signal without additional hardware configuration in the optical sensing device. In particular, accurate noise estimation is possible by pre-measuring a sunlight signal, that is, noise, in one optical sensing device while considering the occupancy time of the transmission trigger signal. Further, when actually measuring an optical signal, as noise removal is performed on a received signal based on pre-measured noise, more accurate noise removal can be achieved.

If the method and device according to the embodiment of the present invention are applied, it is possible to expand the application to a transceiver integrated sensor other than an optical sensing device.

1 is a diagram showing the structure of an optical sensing device according to an embodiment of the present invention.
2 is an operation timing diagram of an optical sensing device according to an embodiment of the present invention.
3 is a diagram showing a detailed structure of a controller of an optical sensing device according to an embodiment of the present invention.
4 is a flowchart of a solar noise removal method according to an embodiment of the present invention.
5 is a structural diagram illustrating a computing device for implementing a solar noise removal method according to an embodiment of the present invention.

Hereinafter, with reference to the accompanying drawings, embodiments of the present invention will be described in detail so that those skilled in the art can easily carry out the present invention. However, the present invention may be implemented in many different forms and is not limited to the embodiments described herein. And in order to clearly explain the present invention in the drawings, parts irrelevant to the description are omitted, and similar reference numerals are attached to similar parts throughout the specification.

Throughout the specification, when a certain component is said to "include", it means that it may further include other components without excluding other components unless otherwise stated.

Expressions written in the singular in this specification may be interpreted in the singular or plural unless an explicit expression such as “one” or “single” is used.

In addition, terms including ordinal numbers such as first and second used in embodiments of the present invention may be used to describe components, but components should not be limited by the terms. Terms are used only to distinguish one component from another. For example, a first element may be termed a second element, and similarly, a second element may be termed a first element, without departing from the scope of the present invention.

Hereinafter, a solar noise removal method light and an optical sensing device using the light according to an embodiment of the present invention will be described with reference to the drawings.

1 is a diagram showing the structure of an optical sensing device according to an embodiment of the present invention.

1, an optical sensor according to an embodiment of the present invention, that is, an optical sensing device 1, includes a transmitter 11 for transmitting an optical signal, a receiver 12 for receiving an optical signal, and a transmitter 11. And a control unit 13 for controlling the receiving unit 12. The receiver 12 may be formed of a photodiode or the like.

The transmitter 11 transmits an optical signal to a measurement target, the receiver 12 receives an optical signal reflected from the measurement target, and the controller 13 performs measurement based on the received optical signal. At this time, the sunlight signal may be received through the receiving unit 12 . In this case, a solar signal is added to the signal output from the receiver 12 in addition to the optical signal from the measurement target. Therefore, as the measurement is performed based on the signal output from the receiver 12, that is, the signal obtained by adding the solar signal as noise to the optical signal from the measurement target, accurate measurement is not performed.

In the embodiment of the present invention, a signal transmitted by the transmitter 11 and then received by the receiver 12 is distinguished from a solar signal as follows.

라고 하고, 태양광 신호를

이라고 하며, 그리고 수신부(12)에서 출력되는 전체 수신 신호를

라고 한다. For convenience of description, a signal transmitted by the transmitter 11 and then received by the receiver 12 in the optical sensing device 1, that is, an optical reception signal by transmission, is described.

, and the solar signal

, and the entire received signal output from the receiver 12

It is said.

)와 송신에 의한 광 수신 신호(

)가 합쳐져서 수신부(12)에서 출력되는 신호는

가 된다. When the optical sensing device 1 receives the light signal and the sunlight signal comes in, the sunlight signal (

) and an optical reception signal by transmission (

) is combined and the signal output from the receiver 12 is

becomes

)와 복원된 태양광 신호(

)를 차동 증폭하여 송신에 의한 광 수신 신호(

)를 구분한다. 즉,

를 이용하여, 태양광 신호와 수신하고자 하는 광신호의 구분이 가능하도록 한다.In this way, considering that the sunlight signal is added to the entire received signal and acts as noise, the embodiment of the present invention measures the sunlight signal, converts it into a digital signal, and then restores the analog signal. For convenience of explanation, the restored analog signal is referred to as a restored sunlight signal. All received signals (

) and the restored solar signal (

) is differentially amplified and the optical reception signal by transmission (

) to distinguish in other words,

Using , it is possible to distinguish between a sunlight signal and an optical signal to be received.

2 is an operation timing diagram of an optical sensing device according to an embodiment of the present invention.

)와 태양광 신호(

)가 합쳐진 신호

이다. In the optical sensing device 1 according to an embodiment of the present invention, as shown in FIG. 2 , the transmission unit 11 transmits an optical signal according to a transmission trigger signal (TX Trigger) from the control unit 13 . Accordingly, the signal transmitted from the transmitter 11 and reflected on the measurement object is received by the receiver 12, and the signal output from the receiver 12 is an optical reception signal by transmission (

) and the solar signal (

) combined signal

am.

)이다. In order to measure and restore the sunlight signal, in an embodiment of the present invention, the sunlight signal is measured in the absence of a transmission trigger signal (TX Trigger). In other words, in a state in which there is no transmission trigger signal (TX Trigger), that is, in a period in which the transmission trigger signal (TX Trigger) is not output from the control unit 13, the control unit 13 transmits the received signal measured by the receiver 12. Measure. At this time, since the light transmission operation by the transmitter 11 is not performed, the optical signal measured by the receiver 12 is a solar signal (

)am.

) 중 송신에 의한 광 수신 신호(

)가 제거된 순수한 광신호(

)를 측정한다. 그리고, 측정된 태양광 신호(

)를 ADC(아날로그-디지털 변환)을 거쳐 디지털 신호로 변환하여 해당하는 디지털 값을 저장한다. 저장된 디지털 값을 설명의 편의상, 태양광 데이터라고 명명한다. As such, in the period in which the transmission trigger signal (TX Trigger) is not output, the entire received signal (

) of the optical reception signal by transmission (

) is removed, the pure optical signal (

) is measured. And, the measured solar signal (

) is converted into a digital signal through ADC (analog-to-digital conversion) and the corresponding digital value is stored. For convenience of description, the stored digital values are referred to as sunlight data.

)를 실제 측정하고자 할 때, 저장된 태양광 데이터를 DAC(디지털-아날로그 변환)를 이용하여 아날로그 신호로 변환하여 태양광 신호를 복원한다. Thereafter, an optical reception signal (by transmission) in a state in which there is a transmission trigger signal (TX Trigger), that is, during a period in which the transmission trigger signal (TX Trigger) is output from the control unit 13

) is actually measured, the stored sunlight data is converted into an analog signal using DAC (digital-to-analog conversion) to restore the sunlight signal.

)와 복원된 태양광 신호(

)를 차동 증폭하여 송신에 의한 광 수신 신호(

)만을 출력한다. 이에 따라 태양광 노이즈가 제거된 수신 신호가 획득되며, 그 결과 광학 감지 장치를 이용한 정확한 측정이 이루어질 수 있다. After restoring the sunlight signal, the entire received signal received by the receiver 12 during the period in which the transmission trigger signal (TX Trigger) is output (

) and the restored solar signal (

) is differentially amplified and the optical reception signal by transmission (

) is output only. Accordingly, a received signal from which sunlight noise is removed is obtained, and as a result, accurate measurement using an optical sensing device can be performed.

On the other hand, the solar signal restoration based on the stored data may be performed in synchronization with the transmission trigger signal (TX Trigger) being output to the transmitter 11, or from the time when the transmission trigger signal (TX Trigger) is output. Substantially, the solar signal recovery based on the stored data may be performed after a set time considering the time at which the signal is reflected and received from the measurement object has elapsed.

In addition, a transmission trigger signal (TX Trigger) may be immediately output to the transmitter 11 in synchronization with the sunlight data being stored after measurement of the sunlight signal is performed.

Meanwhile, in the embodiment of the present invention, the control unit 13 of the optical sensing device 1 controls the transmitting unit 11 and the receiving unit 12 to synchronize transmission and reception, so that the transmission signal of the optical sensing device 1 is transmitted.

To this end, the controller 13 of the optical sensing device 1 may have the following structure.

3 is a diagram showing a detailed structure of a controller of an optical sensing device according to an embodiment of the present invention.

In the optical sensing device 1 including the transmitter 11, the receiver 12, and the controller 13, the controller 13, as shown in the accompanying FIG. 3, includes a micro controller unit (MCU) 131, an ADC ( It includes an analog to digital converter (132), a digital to analog converter (DAC) 133 and a differential amplifier (134).

The MCU 131 is configured to control the optical signal transmission operation of the transmitter 11 and the optical signal reception operation of the receiver 12, and is also configured to perform a sunlight removal operation. The MCU 131 outputs a transmission trigger signal (TX Trigger) to the transmission unit 11 during an optical signal transmission operation, and does not output a transmission trigger signal (TX Trigger) to the transmission unit 11 during a sunlight removal operation. The MCU 131 is configured to store sunlight data acquired through the receiver 12 during a sunlight removal operation. This MCU 131 may also be referred to as a control unit.

The ADC 132 is configured to convert the signal output from the receiver 12 into a digital signal and transfer it to the MCU 131. In particular, the ADC 132 is configured to convert the sunlight signal output from the receiver 12 into a digital signal, that is, sunlight data, and transmit the converted sunlight signal to the MCU 131 during the sunlight removal operation.

)가 복원되어 차동 증폭기(134)로 제공된다. The DAC 133 converts the signal provided from the MCU 131 into an analog signal and outputs it. In particular, the DAC 133 converts the solar data provided from the MCU 131 into an analog signal and transmits it to the differential amplifier 134. do. By this DAC 133, the sunlight signal (

) is restored and provided to the differential amplifier 134.

)와 DAC(133)로부터 출력되는 신호인 복원된 태양광 신호(

)를 차동 증폭하여 송신에 의한 광 수신 신호(

)만을 출력한다. The differential amplifier 134 differentially amplifies and outputs a signal output from the receiver 12 and a signal output from the DAC 133, and is particularly configured to output a measurement optical signal. In particular, the differential amplifier 134 is the entire received signal (signals output from the receiver 12 during the optical signal transmission operation)

) and the restored sunlight signal, which is a signal output from the DAC 133 (

) is differentially amplified and the optical reception signal by transmission (

) is output only.

Meanwhile, in the embodiment of the present invention, the control unit 13 of the optical sensing device 1 controls the transmitting unit 11 and the receiving unit 12 to synchronize transmission and reception to receive a transmission signal of the corresponding optical sensing device 1. can do.

Based on the optical sensing device 1 having such a structure, the following solar noise removal method may be performed.

4 is a flowchart of a solar noise removal method according to an embodiment of the present invention.

In an embodiment of the present invention, the optical sensing device 1 measures a solar signal before transmitting an optical signal, as shown in FIG. 4 (S100). In this case, the MCU 131 does not output a transmission trigger signal (TX Trigger) to the transmitter 11. Accordingly, the receiving unit 12 receives only the sunlight signal.

Next, the signal according to the measurement of the sunlight signal is converted into a digital signal and stored as sunlight data (S110). When measuring the sunlight signal, the signal output from the receiver 12 is converted into a digital signal by the ADC 132. The MCU 131 stores the measured digital signal as sunlight data.

Thereafter, an optical signal transmission operation is performed to measure a measurement object, and a received signal is measured (S120 and S130). In this case, the MCU 131 outputs a transmission trigger signal (TX Trigger) to the transmitter 11. Accordingly, the transmitter 11 transmits an optical signal to the measurement target, and the receiver 12 receives a signal reflected from the measurement target (light reception signal by transmission). At this time, the solar signal is also transmitted by the receiver 12. Received. All received signals, which are signals received by the receiver 12, are output to the differential amplifier 134.

When the sunlight signal is measured, the sunlight signal is restored based on the stored sunlight data (S140). The MCU 131 outputs the stored sunlight data to the DAC 133, and the DAC 133 converts the sunlight data into an analog signal and outputs it to the differential amplifier 134. Accordingly, the entire received signal and the restored sunlight signal are input to the differential amplifier 134 .

)와 -단자로 입력되는 복원된 태양광 신호(

)를 차동 증폭하여 송신에 의한 광 수신 신호(

)만을 측정 신호로 출력한다. Thereafter, the entire received signal measured according to the optical signal transmission operation and the restored solar light signal are differentially amplified to obtain only the optical received signal by transmission (S150). The differential amplifier 134 is, for example, the entire received signal input to the + terminal (

) and the restored sunlight signal input to the - terminal (

) is differentially amplified and the optical reception signal by transmission (

) is output as a measurement signal.

According to this embodiment of the present invention, since the sunlight signal is measured during a period in which an optical signal transmission operation is not performed, a more accurate sunlight signal, ie, noise, can be estimated. In particular, if the noise is estimated using a separate illuminance sensor, etc. without considering the occupancy time of the transmission trigger signal, the sensor that measures the noise (illuminance sensor) and the sensor that measures the original signal combined with the noise (the receiver of the optical sensing device) ) is different, it is difficult to accurately estimate the noise, that is, the sunlight signal. However, according to an embodiment of the present invention, a solar signal, that is, noise, is pre-measured in one optical sensing device while considering the occupancy time of the transmission trigger signal, and when the actual optical signal is measured, the received signal is received based on the pre-measured noise. As the noise is removed from the signal, more accurate noise estimation can be made than when noise is measured using different sensors.

In addition, if noise is estimated in a state in which other signals having different amplitudes or frequencies are added to the same signal, accurate estimation such as noise is differently estimated is not performed. However, in an embodiment of the present invention, instead of isolating noise from the entire received signal, it is possible to remove noise from the entire received signal by obtaining separately measured noise through restoration.

5 is a structural diagram illustrating a computing device for implementing a solar noise removal method according to an embodiment of the present invention.

As shown in FIG. 5 , the solar noise removal method according to an embodiment of the present invention may be implemented using the computing device 100 .

The computing device 100 may include at least one of a processor 110 , a memory 120 , an input interface device 130 , an output interface device 140 , and a storage device 150 . Each component may be connected by a bus 160 to communicate with each other. In addition, each of the components may be connected through an individual interface or individual bus centered on the processor 110 instead of the common bus 160 .

The processor 110 may be implemented in various types such as an application processor (AP), a central processing unit (CPU), a graphic processing unit (GPU), and the like, and executes commands stored in the memory 120 or the storage device 150. It may be any semiconductor device that The processor 110 may execute a program command stored in at least one of the memory 120 and the storage device 150 . Such a processor 110 may be configured to implement the functions and methods described above based on FIGS. 1 to 4 .

The memory 120 and the storage device 150 may include various types of volatile or non-volatile storage media. For example, the memory may include read-only memory (ROM) 121 and random access memory (RAM) 122 . In an embodiment of the present invention, the memory 120 may be located inside or outside the processor 110, and the memory 120 may be connected to the processor 110 through various known means.

Input interface device 130 is configured to provide data to processor 110 , and output interface device 140 is configured to output data from processor 110 . For example, the input interface device 130 may process a signal received by the receiver of the optical sensing device into a signal processable by the processor 110 and transmit the signal to the processor 110 .

The output interface device 140 may be configured to output data provided from the processor 110 . For example, the output interface device 140 may output a control signal provided from the processor 110 to a transmitting unit and/or a receiving unit of the optical sensing device so that the optical sensing device transmits/receives. The input interface device 130 and the output interface device 140 may be collectively referred to as an interface device.

Meanwhile, the computing device 100 may include a network interface device (not shown). In this case, the network interface device may be configured to receive data input through the network and transfer the received data to the processor 110 or transmit the processing result of the processor 110 to another device through the network. For example, the network interface device may be configured to transmit a sensor signal measured by an optical sensing device output from the processor 110 to another device.

At least a part of the solar noise removal method according to an embodiment of the present invention may be implemented as a program or software that runs on the computing device 100, and the program or software may be stored in a computer-readable medium.

In addition, at least a part of the solar noise removal method according to an embodiment of the present invention may be implemented as hardware that can be electrically connected to the computing device 100 .

Embodiments of the present invention are not implemented only through the devices and/or methods described above, and may be implemented through a program for realizing functions corresponding to the configuration of the embodiments of the present invention, a recording medium on which the program is recorded, and the like. Also, this implementation can be easily implemented by an expert in the art to which the present invention belongs based on the description of the above-described embodiment.

Although the embodiments of the present invention have been described in detail above, the scope of the present invention is not limited thereto, and various modifications and improvements of those skilled in the art using the basic concept of the present invention defined in the following claims are also included in the scope of the present invention. that fall within the scope of the right.

Claims (9)

A method for removing solar noise in an optical sensing device, comprising:
measuring a solar signal through a receiving unit of the optical sensing device during a period in which the control unit of the optical sensing device does not transmit an optical signal;
converting, by the control unit of the optical sensing device, the measured sunlight signal into digital sunlight data, and storing the converted sunlight data;
performing, by a control unit of the optical sensing device, optical signal transmission through a transmitting unit of the optical sensing device;
measuring, by the control unit of the optical sensing device, all received signals, which are signals received by the receiving unit according to the transmission of the optical signal;
restoring, by the controller of the optical sensing device, a sunlight signal by converting the stored sunlight data into an analog signal; and
Acquiring, by a control unit of the optical sensing device, an optical reception signal received by transmitting the optical signal based on the entire received signal and the restored sunlight signal
How to include. According to claim 1,
The step of performing the solar signal measurement is
In a state in which the controller of the optical sensing device does not output a transmission trigger signal to the transmitter, the solar signal measurement is performed through the receiver. According to claim 1,
In the step of transmitting the optical signal, the transmission of the optical signal is performed in a state in which the control unit of the optical sensing device outputs a transmission trigger signal to the transmission unit;
In the step of restoring the sunlight signal, the control unit restores the sunlight signal during a period in which the transmission trigger signal is output. According to claim 1,
In the step of obtaining the optical reception signal received by the transmission of the optical signal, the controller obtains the optical reception signal by differentially amplifying the entire received signal and the restored solar light signal. a transmitter configured to perform optical signal transmission;
a receiver configured to perform optical signal reception; and
A control unit configured to control the transmitting unit to perform the optical signal transmission and to control the receiving unit to perform the optical signal reception.
including,
The control unit
During a period in which optical signal transmission is not performed, the solar signal is measured based on the signal received through the receiver, and the measured solar signal is converted into digital solar data, which is stored.
Operating the transmission unit to perform optical signal transmission and measuring all received signals received through the reception unit according to the transmission of the optical signal;
converting the stored sunlight data into an analog signal to restore a sunlight signal, and to obtain an optical reception signal received by transmitting the optical signal based on a total received signal that is the measured signal and the restored sunlight signal configured, an optical sensing device. According to claim 5,
The control unit measures the sunlight signal through the receiver in a state in which a transmission trigger signal is not output to the transmission unit, and the control unit outputs a transmission trigger signal to the transmission unit to transmit an optical signal through the transmission unit. , An optical sensing device configured to restore the sunlight signal during a period in which the transmission trigger signal is output. According to claim 5,
The control unit
a control unit configured to control an optical signal transmitting operation of the transmitting unit and an optical signal receiving operation of the receiving unit, and measure a solar signal;
a first signal converting unit configured to convert a signal output from the receiving unit into a digital signal and transmit the converted digital signal to the control unit when the solar signal is measured;
a second signal converter configured to convert the data provided from the control unit into an analog signal and output the analog signal; and
A differential amplifier configured to differentially amplify and output a signal output from the receiver and a signal output from the second signal conversion unit.
Including, an optical sensing device. According to claim 7,
The control unit is configured to store the digital signal transmitted from the first signal conversion unit as sunlight data when the solar signal is measured, and to provide the sunlight data to the second signal conversion unit during an optical signal transmission operation of the transmission unit. configured, an optical sensing device. According to claim 8,
A signal input to the first input terminal of the differential amplifier is a total reception signal, which is a signal output from the reception unit during an optical signal transmission operation of the transmission unit, and the total reception signal is received by transmitting a solar light signal and the optical signal An optical sensing device comprising a light reception signal, wherein a signal input to a second input terminal of the differential amplifier is the restored sunlight signal corresponding to the sunlight data.

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