KR100293058B1 - Light control device and method using light detective sensor - Google Patents

Abstract

PURPOSE: An optical sensor interworking apparatus and a method for controlling the same are provided to maintain a predetermined value of luminous intensity by producing correctly a dimming percent and a dimming tilt angle. CONSTITUTION: An optical sensor(14) is used for measuring a luminous flux. An A/D converter(16) is used for converting an optical sense signal received from the optical sensor(14) to a particular format signal. A control computer(18) is used for producing a dimming tilt angle and a dimming percent according to the particular format modulation signal. A D/A converter(20) is used for converting the dimming percent signal to an analog signal. An electronic dimming stabilizer(20) is used for controlling luminous intensity of a lighting apparatus. The optical sensor(14) is included in a fixing portion. A software for dimming tilt angle and the dimming percent is installed in the control computer(18).

Description

Optical sensor interlock control device and control method {LIGHT CONTROL DEVICE AND METHOD USING LIGHT DETECTIVE SENSOR}

The present invention relates to an optical sensor interlocking control device and a control method, and more particularly, according to the change of the main light or auxiliary light incident from the outside of the luminous flux operated by electric energy, such as a fluorescent lamp installed indoors. The present invention relates to an optical sensor interlocking control device and a control method capable of saving electric energy for lighting that is wasted in buildings and maintaining a comfortable lighting state at all times.

Most of the lighting used during the day or at night uses electrical energy, and electrical energy consumed for lighting in general commercial buildings accounts for about 30 to 40% of the electrical energy consumed in the entire building. In particular, despite the supply of sufficient sunlight from the outside in clear weather, fluorescent lamps and the like are used due to habitual or structural problems of the building itself. However, such a high rate of lighting electrical energy consumption causes many problems such as the continuous increase in energy generation costs (oil prices, labor costs, power plant construction costs, etc.) and global environmental protection problems. The government and related industries are making a lot of efforts to solve the cost rise of energy production and environmental pollution.

For example, as part of specific efforts to reduce the consumption of electric energy and protect the environment, the government provides funding and tax support for energy saving efforts, and the Korea Energy Management Corporation, through the green lighting movement, reduces electric energy for lighting and the environment. The protection movement is being promoted. In addition, from the technical point of view, the development of an automatic lighting system that automatically controls the interior lighting is in progress. An optical sensor interlocking control system, which is an example of such an automatic lighting system, variably controls the luminous flux of artificial lighting in a space where daylight, that is, daylight, can be usefully used as a main light source. It is to save electric energy.

This minimizes the energy used for electric lighting, and ensures that the illuminance of the work surface by artificial electric lighting such as fluorescent lamps or incandescent lamps and daylight-complexed lighting is always maintained at the planned illuminance set by the user. . The successful implementation of the light sensor interlocking control system is based on how the light sensor that detects daylight installed on the ceiling or wall accurately detects illuminance of the working surface, and the lighting control unit transmits an accurate dimming signal according to the detected illuminance. It depends.

FIG. 1 is a schematic configuration diagram of an optical sensor interlocking control system used in the related art, and typically includes a dimming percentage value according to an optical sensor 2 fixed in one direction and an optical signal input from the optical sensor 2. The control part 4 which calculates, and the electronic dimming control part 6 which adjust the brightness of the fluorescent lamp 8 (or incandescent lamp) according to the control signal from the said control part 4 are comprised.

In the conventional optical sensor interlocking control system configured as described above, since the optical sensor is fixed in only one direction, an algorithm for calculating the characteristics of the space (distance, angle with the illuminance surface) and the dimming percentage of the controller (only one algorithm) Luminous flux detection was not performed.

Therefore, the illuminance of the working surface could not be kept constant and a large illuminance deviation occurred according to the external conditions and the system algorithm. That is, since the control unit 4 cannot calculate the exact dimming slope and dimming percentage required for the working surface according to the change of the daylight, when the illuminance value is kept lower than the set value, it causes a poor working environment to work indoors. Influence on the productivity of the worker, when the illuminance value is maintained higher than the set value there was a problem that excessive energy consumption.

The present invention has been made to solve the above problems, an object of the present invention is to calculate the correct dimming slope and dimming percentage applied to a specific work surface according to the change of daylight incident to the room can maintain the set illuminance value The present invention provides an optical sensor interlocking control device and a control method.

Another object of the present invention is to provide an optical sensor interlocking control device and a control method which can improve work productivity and save energy by maintaining an illuminance value on a specific work surface accurately.

The optical sensor interlock control apparatus of the present invention for achieving the above object, the optical sensor for measuring the luminous flux of the main light, and the optical sensor to accommodate the optical sensor so that the front, rear, left and right movement can be attached to the wall or ceiling A fixed part, an A / D converter for converting the optical sensing signal input from the optical sensor into a specific format signal, a specific format modulated signal input from the A / D converter, and a setting value input by the user A control computer incorporating a program for calculating a dimming slope and a dimming percentage by a specific calculation algorithm, a D / A converter for modulating the dimming percentage signal output from the control computer into an analog signal, and the D / A converter. It consists of an electronic dimming ballast for adjusting the brightness of the lighting fixture such as a fluorescent lamp according to the output signal, the optical sensor connection of the present invention Control method, comprising: a first step of detecting the amount of the light beam from the optical sensor in a state oriented in a particular direction; Calculating a dimming slope by receiving the detected amount of luminous flux and user setting data; Calculating a dimming percentage using the dimming slope calculated above; And a fourth step of adjusting the brightness of the luminaire using the calculated dimming percentage.

1 is a schematic block diagram of a conventional optical sensor interlock control device,

2 is a circuit diagram of an embodiment of an optical sensor interlock control device according to the present invention;

3 is an exploded perspective view of an embodiment of an optical sensor fixing unit according to the present invention;

4 is a flowchart showing a daylight sensor interlock control method according to the present invention.

<Explanation of symbols for main parts of drawing>

2: light sensing unit, 4: control unit,

6: electronic dimming control unit, 8: fluorescent lamp,

12: voltmeter, 13: fixed part,

14: optical sensor, 16: A / D converter,

18: control computer, 20: D / A converter,

22: electronic dimming ballast, 24: fluorescent lamp.

Hereinafter, an optical sensor interlocking control device and a control method of the present invention will be described in detail with reference to the accompanying drawings.

The optical sensor interlock control device and control method of the present invention are intended to provide a pleasant environment by maintaining energy saving and illuminance in a set state, and change the sensing direction of the optical sensor, and calculate the dimming slope and dimming percent calculation algorithm accordingly. By optimizing, the roughness of the working surface is maintained accurately.

In the optical sensor interlocking control apparatus of the present invention, referring to Figure 2, the optical contact surface of the optical sensor 14 for measuring the luminous flux of the main light, and the optical sensor 14 for sensing the light front, rear, left, right, or 360 ° A fixing unit 13 accommodating the optical sensor 14 to enable rotational movement, an A / D converter 16 for converting an optical sensing signal input from the optical sensor 14, and the A / D converter A control computer 18 for calculating a dimming slope and a dimming percentage using the modulation signal and the set value inputted from (16), and a D / A converter for modulating the dimming percentage output from the control computer 18 into an analog signal. And an electronic dimming stabilizer 22 that adjusts the brightness of a luminaire such as a fluorescent lamp 24 in accordance with the signal output from the D / A converter 20.

The user first receives the light sensor 14 in the fixing part 13 as shown in FIG. 3 and attaches it to a place where the illuminance of the working surface can be measured. The fixing part 13 is illustrated in FIG. 3, but may be variously modified so that the optical sensor 14 may move forward, backward, left, right, or 360 ° to suit the purpose of the present invention. By moving the optical sensor in this way, the user can adjust the position of the optical sensor 14 according to the characteristics of the space. Also, the algorithm for calculating the dimming slope and the dimming percentage (open loop professional or closed loop professional) in accordance with the direction of the optical sensor 14 is changed, which will be described later.

When the measurement direction is set by the user, the optical sensor 14 measures the amount of luminous flux. Since the photoelectric sensor 14 is supplied with a power supply (rectified commercial power supply or battery) by the voltage generator 12, the amount of luminous flux measured by the photoelectric sensor 14 is output as a signal of a corresponding low voltage. At this time, the output signal is an analog signal. The A / D converter 16 modulates the amount of luminous flux input as an analog signal into a digital signal. Signals input from the optical sensor 14 to the A / D converter 16 are S _EM , S _D (t _c ), and S _T (t). S _EM is the signal of the light sensor 14 when the artificial light is 100% in the state excluding daylight, and S _D (t _c ) is the light sensor by daylight only at the time of system calibration, that is, system setting. S _T (t) is the signal of the light sensor, which is the signal in the case of (daylight + artificial light).

After such a signal is input and modulated, the modulated signal is input to the control computer 18. In order to measure these, S _D (t _c ) and S _EM should perform operations such as turning off artificial light and introducing only daylight, or turning on artificial light and blocking daylight by using a barrier.

The signal corresponding to the amount of luminous flux input from the optical sensor 14 is temporarily stored in the memory of the control computer 18. At the same time, the control computer 18 receives E _EM , E _D (t _c ) as the illuminance setting value from the user. E _EM is the illuminance of the working surface when artificial (electric) lighting is 100% excluding daylight, and E _D (t _c ) is the value input during system calibration, that is, when setting up the system. The illuminance of.

As described above, when data is input to the control computer 18, the control computer 18 determines the dimming slopes M _CL and M _OP and the dimming percentages δ _CL and δ _OP by preset internal stored algorithms. do. In the above, M _CL is the dimming gradient at closed-loop proportional, M _OP is the dimming gradient at open-loop proportional, and M _CL and M _OP is given by the following equation, respectively.

M _CL = E _D (t _c ) / {(E _D (t _c ) x S _EM )-(E _EM x S _D (t _c ))}

M _OP = E _D (t _c ) / {(E _D (t _c ) x S _EM )-(E _EM x S _EM )-(E _EM x S _D (t _c ))}

The variables in Equations 1 and 2 are given data values from the keyboard inputs of the light sensor 14 and the control computer 18, so that the respective dimming slopes are calculated. When M _CL and M _OP are calculated as described above, the control computer 18 again uses the built-in software to set the dimming percentages δ _CL , δ _OP by using the signal value S _T (t) of the optical sensor 14. Calculate. The dimming percentage is calculated for the open loop and closed loop time, respectively, by the equations

δ _{CL =} {1 + M _CL x (S _D (t _c )-S _EM )} / {1- (M _CL x S _EM )} ₌ M _CL x S _T (t) + 1

δ _{OP =} (M _OP x S _D (t _c ) + 1} / {1-(M _OP x S _EM )} ₌ M _OP x (S _T (t)-S _EM ) + 1

When the dimming percentage is calculated as described above, the control computer 18 outputs a corresponding electrical signal. The signal output at this time is a digital signal. This control signal is input to the D / A converter 20 and modulated back into an analog signal.

The modulated signal is input to the electronic dimming ballast 22. The electronic dimming stabilizer 22 is actually to adjust the brightness of the fluorescent lamp 24, for example, to adjust the brightness by changing the voltage or current value applied to the fluorescent lamp 24. This is essentially the same as the electronic dimming control section 6 shown in FIG. Although the luminaire has been described as a fluorescent lamp in the above description, it will be apparent to those skilled in the art that incandescent lamps or other kinds of luminaires may be used.

If the user wants to work as described above, the illuminance of the working surface can be kept constant at all times, and in particular, the user arbitrarily adjusts the optical contact surface of the optical sensor 14 to 180 ° to 360 ° and calculates the dimming percentage accordingly. By selective application, accurate luminous flux detection is possible. In other words, the dual algorithms of the open loop professional and closed loop professional algorithms can be selectively used according to the optical sensor detection direction during system setting (calibration).

For example, in the case of using the open loop professional algorithm, the direction of the optical sensor should be taken into consideration so that the optical sensor 14 does not detect the amount of luminous flux caused by artificial (electrical) lighting. It will be apparent to those skilled in the art to which the present invention pertains.

In the flowchart of FIG. 4, the optical sensor interlocking control method of the present invention as described above is described. As shown, the amount of luminous flux sensed from the photosensor 14 is input as measured values S _EM , S _D (t _c ) and S _T (t) for the luminous flux. After the measurement values are input, illuminance measurement values (values determined by the user) are input again through a computer. When the data values are input as described above, the internal microcomputer of the control computer 18 calculates the dimming slope and the dimming percentage. This is performed by Equations 1 to 4 above.

At this time, the user may set the equations calculated according to the orientation position of the light sensor 14 to be either an open loop professional or a closed loop professional. This is done via command input to the control computer 18. In other words, when the first operation is performed using the optical sensor 14, the user decides to use the open loop or the closed loop by inputting a specific command using the control computer 18.

In addition, since the amount of luminous flux (particularly daylight) changes with time, it is possible to periodically set the time for reading the signal S _T (t) of the optical sensor from the optical sensor 14 to determine the dimming percentage. Therefore, the electronic dimming ballast is periodically changed instead of adjusting the fluorescent lamp 24 in an analog manner.

Furthermore, the method of the present invention includes a function that can be operated manually regardless of the signal input from the photosensor 14. In other words, it is possible to improve the convenience of use by adding a separate function so that the user can arbitrarily adjust the electric light within the range of 100% to the minimum value irrespective of the amount of light flux of the signal.

In addition, in the present invention, the signal S _T (t) of the optical sensor and the amount of change in dimming percent δ are output as graphs. In this way, the function of accurately recognizing and correcting the illumination intensity change condition according to the light change in a specific place is given. It is apparent to those skilled in the art that such an output can be configured to output discretely or analogously according to the set time T.

As described above, according to the present invention, an accurate dimming ratio can be calculated according to the change of daylight incident to the room, and the set illuminance value can be maintained, and by maintaining the illuminance value accurately, work productivity can be improved and energy can be saved. .

Although the invention has been described in detail only with respect to the described embodiments, it will be apparent to those skilled in the art that modifications and variations can be made within the spirit and scope of the invention, and such variations or modifications will belong to the appended claims. .

Claims (6)

An optical sensor 14 for measuring luminous flux of daylight; An A / D converter 16 for converting an optical sensing signal input from the optical sensor 14 into a specific format signal; A control computer (18) incorporating software for calculating dimming slope and dimming percentage, respectively, according to a specific format modulated signal input from said A / D converter (16); A D / A converter (20) for modulating the dimming percentage signal output from the control computer (18) into an analog signal; And In the optical sensor interlock control device comprising an electronic dimming stabilizer 22 for adjusting the brightness of the lighting fixture in accordance with the signal output from the D / A converter 20, The optical sensor 14 is accommodated in the fixing portion 13 to change the direction of the optical contact surface, when calibrating the S _EM signal, the system detected when the artificial light is 100% in the state excluding daylight Outputting the S _D (t _c ) signal by daylight only and the S _T (t) signal detected when daylight and artificial light are combined to the A / D converter 16; The software of the control computer 18 is a specific format signal of S _EM , S _D (t _c ), S _T (t) input from the A / D converter 16, except for daylight, which is input by a user. Direction of the light sensor using the illuminance value of the working surface when the artificial (electric) lighting is 100%, E _EM and the illuminance value of the working surface by daylight only, E _D (t _c ) when calibrating the system And a dimming slope and a dimming percentage, respectively, according to the open loop professional algorithm or the closed loop professional algorithm. The method of claim 1, wherein when the open loop professional algorithm is applied, the dimming slope is M _OP = E _D (t _c ) / {(E _D (t _c ) x S _EM )-(E _EM x S _EM )-(E _EM x S _D (t _c ))} and the dimming percentage value is δ _{OP =} {M _OP x S _D (t _c ) + 1} / {1-(M _OP x S _EM )} ₌ Calculated by M _OP x (S _T (t)-S _EM ) + 1; When the closed loop professional algorithm is applied, the dimming slope is M _CL = E _D (t _c ) / {(E _D (t _c ) x S _EM )-(E _EM x S _D (t _c ) ), And the dimming percentage value is δ _{CL =} {1 + M _CL x (S _D (t _c )-S _EM )} / {1- (M _CL x S _EM )} ₌ M _CL x S _T Optical sensor interlocking control device, characterized in that calculated by (t) + 1. A first step of sensing and storing the amount of luminous flux using an optical sensor; Calculating a dimming slope by receiving the sensed amount of light beam; Calculating a dimming percentage using the dimming slope calculated above; And In the optical sensor interlock control method comprising the fourth step of adjusting the brightness of the luminaire using the calculated dimming percentage, In the first step, the optical sensor outputs signals of S _EM , S _D (t _c ) and S _T (t) such that the optical contact surface is directed in a specific direction toward the working surface; Optical sensor using S _EM , S _D (t _c ), S _T (t) and E _EM , E _D (t _c ) input by the user in steps 2 and 3 And a dimming slope and a dimming percentage are respectively calculated by an open loop professional algorithm or a closed loop professional algorithm according to the direction of the optical sensor. The method of claim 3, wherein the dimming slope value is M _OP = E _D (t _c ) / {(E _D (t _c ) x S _EM )-(E _EM x S when the open loop professional algorithm is applied. _EM )-(E _EM x S _D (t _c ))} and the dimming percentage value is δ _{OP =} {M _OP x S _D (t _c ) + 1} / {1-(M _OP x S _EM )} ₌ M _OP x (S _T (t)-S _EM ) + 1 optical sensor interlock control method characterized in that calculated by. The method of claim 3, wherein when the closed loop professional algorithm is applied, the dimming slope value is M _CL = E _D (t _c ) / {(E _D (t _c ) x S _EM )-(E _EM x S _D (t _c ))} and the dimming percentage value is δ _{CL =} {1 + M _CL x (S _D (t _c )-S _EM )} / {1- (M _CL x S _EM )} ₌ M _CL x S _T (t) + 1 optical sensor interlock control method characterized in that it is calculated. 4. The method of claim 3, wherein the signal input from the optical sensor is periodically input to calculate the dimming percentage, and outputs a graph of a change amount of the signal S _T (t) and the dimming percentage δ of the optical sensor as graphs. Optical sensor interlocking control method, characterized in that.