CN101720149B - Illumination power saving system based on wireless sensor network - Google Patents

Abstract

The invention relates to an illumination power saving system based on a wireless sensor network. The illumination power saving system comprises a wireless sensor node, a lamp node, and a main control microprocessor; wherein the wireless sensor node is used for realizing human detection and illuminance detection; the lamp node is arranged on a lamp and used for realizing lamp brightness control; the main control microprocessor comprises a lamp turning-on control unit, a preset illuminance computing unit and a lamp brightness regulation unit. The lamp turning-on control unit is used for sending out a lamp turning-on instruction when receiving signals of an infrared sensor, such as when the infrared sensor detects that somebody in a house, or else, a lamp turning-off instruction is sent out; the preset illuminance computing unit is used for computing lamp dimming index, wherein the dimming index is one-one corresponding to the preset illuminance value; and the lamp brightness control unit is used for receiving an illuminance signal detected by an illuminance sensor and comparing a measured value with the preset illuminance value, and sending out an instruction of regulating the lamp brightness to the preset illuminance value. The invention has the advantages of avoidance of wiring operations, low reformation cost and high intelligent degree.

Description

Illumination power saving system based on wireless sensor network

Technical field

The invention belongs to the device of intelligent lighting energy-saving field, relate generally to a kind of illumination power saving system.

Background technology

Nineteen ninety-five, the energy output of China was 1.0023 trillion kilowatt hours, 2008 Urban Annual Electrical Power Consumption amounts, 34,268 hundred million kilowatt hours, and the growth of therefrom finding out power consumption is very rapidly.Electric consumption on lighting accounts for about the 10%-15% of total power consumption, and year power consumption number is huge.Although China's lighting has adopted new type light source, luminous efficiency is higher, and illuminator is more outmoded, and total efficient is lower, and very large energy-saving potential is arranged, and traditional way is generated electricity with coal, so use and the environmental pollution of electricity are also closely related.

In the actual life, aspect illuminating energy-saving, still there are many problems:

(1), present economize on electricity product is attached to the sub-fraction in the whole intellectualizing system often, causes our general family can only hope and give birth to and sigh;

(2), not having a kind of product can not destroy original system installs; And the cost of this installation is appreciable;

(3), people are ripe not enough to the idea for this system of illuminating energy-saving.

Intelligent illuminating system adopts the mode that line traffic control is arranged mostly now, wants existing old illuminator is installed power saving apparatus, just must destroy original illuminator, and this not only affects attractive in appearance, and the one-tenth that also will spend simultaneously writing was transformed originally.

Summary of the invention

The deficiency complicated for the wiring that overcomes existing intelligent illuminating system, that improvement cost is high the invention provides a kind of wiring operations, illumination power saving system based on wireless sensor network that low, the intelligent degree of improvement cost is high avoided.

The technical solution adopted for the present invention to solve the technical problems is:

A kind of illumination power saving system based on wireless sensor network, comprise realizing the people detection, illuminance detection wireless sensor node and realize the light fixture node that lamp brightness is regulated on the light fixture in order to be installed in, wherein,

Described wireless sensor node comprises main control microprocessor, infrared sensor, illuminance sensor, A/D modular converter and the first wireless communication module, described infrared sensor is connected with described main control microprocessor with illuminance sensor, described main control microprocessor connects the A/D modular converter, and described A/D modular converter connects the first wireless communication module;

Described light fixture node comprises light fixture microprocessor, lighting control module and the second wireless communication module, described light fixture microprocessor connects described lighting control module, described the first wireless communication module and the communication connection of described the second wireless communication module, described the second wireless communication module is connected with described light fixture microprocessor;

Described main control microprocessor comprises:

Light fixture is opened control unit, is used for when receiving the signal of infrared sensor, as detects people from room arranged, and then sends and opens the light fixture instruction; Otherwise, send the instruction of turn-offing light fixture;

Default illuminance is calculated the unit, and in order to calculate the lamp light-regulating index, described light modulation index is corresponding one by one with default illuminance value, and computational process is:

Set the positional information, user of light fixture node to the requirements E of indoor light intensity _Sat, light modulation district Z _DimZone radius l _AstWith light fixture range of exposures Z _Lamp, whole lamp control working face is divided into a plurality of square residential quarters, and described square residential quarter is less than described light modulation district Z _Dim

Determine the current square residential quarter of people present position, according to light modulation district Z _DimEach interior square residential quarter is with the horizontal span l of each square residential quarter apart from the current square residential quarter of human body present position _ColWith vertical span l _RowObtain described horizontal span l _ColWith vertical span l _RowAll with the number of rectangular cells lattice as unit, with m=l _Col+ l _RowDeposit in by among the array L of position, array E is generated by the L conversion, reads the element L of one of them array L _iValue m, E _i=(0.8) ^mE _Sat

People residing position Q (x, y), the coordinate of light fixture are P (x _i, y _i), the setting height(from bottom) of light fixture is to be h, and single light source illumination affects array A, and single light source illumination affects the elements A among the array A ⁱ:

Wherein, I _θThe luminous intensity of light source on the θ angular direction;

If each lamp light-regulating index is d _i, whole lamp control working face has k small cup lamp, finds the solution d _i:

$\left\{\begin{array}{c}E=\mathrm{Ad}\\ \min \left|\right|d\left|\right|\\ 0<d<1\end{array}\right.$

Wherein, $E=\underset{i=1}{\overset{k}{\mathrm{\&Sigma;}}}{d}_i{A}^i=\underset{1}{\overset{k}{\mathrm{\&Sigma;}}}{d}_i\left\{A^i\right[0],\&CenterDot;\&CenterDot;\&CenterDot;,A^i[l_{\mathrm{vector}}\left]\right\},$ Substitution array E, array A ⁱChange:

$E=\left[\begin{array}{cccc}{A}^1\left[0\right],& A^2\left[0\right],& ......,& A^k\left[0\right]\\ ..........& & & \\ A^1\left[l_{\mathrm{vector}}\right],& A^2\left[l_{\mathrm{vector}}\right],& ......,& A^k\left[l_{\mathrm{vector}}\right]\end{array}\right]d=\mathrm{Ad}$

||d|| ₁＝|d ₁|+|d ₂|+...+|d _k|；

The d that obtains _iBe each lamp light-regulating index;

The lamp brightness regulon is used for accepting the illuminance signal that illuminance sensor detects, and measured value and default illuminance value are compared, and sends and regulates lamp brightness to the instruction of setting illuminance value.

Further, described default illuminance is calculated in the unit, and the light fixture node is received a plurality of light modulation indexes, with each d that successively receives _IkValue is found the solution mean value,

K is the number of light modulation index, this mean value

Output valve for the lamp light-regulating index.

Further again, described the first wireless communication module and the second wireless communication module are all in accordance with the ZigBee wireless communication protocol.

Technical conceive of the present invention is: Sensor Network, claim again Internet of Things, and refer to that physical world is perceived as purpose, take information processing as main task, take network as the information interaction carrier, realize the information interaction between thing and thing, thing and the people, the intelligent comprehensive information system of perception information service is provided.Except the network that sensing node forms, Sensor Network can also be realized merging with networks such as the Internet, mobile radio communications comprehensively.

Radio sensing network is realized the exploitation of illumination power saving system, according to the current indoor light intensity that senses, people's positional information come automatic decision and the light illumination mode that pre-sets between the illumination gap, can effectively overcome the defectives such as wiring in the existing intelligent lighting mode is complicated, improvement cost is high.

Illumination power saving system so that radio sensing network makes up mainly is comprised of radio sensing network illumination power-saving device and this two large divisions of software platform.System makes up by radio sensing network, realizes the light in the environment is monitored control.

The radio sensing network illumination power-saving device mainly consists of whole network by two kinds of different nodes---wireless sensor node and light fixture node.Wireless sensor node mainly comprises the compositions such as microprocessor, transducer, data acquisition module, A/D modular converter and wireless communication module.Transducer has: 1) people's detection: realize if detect the room people being arranged by infrared sensor, then lamp is opened, otherwise with the lamp autoshutdown; 2) to the detection of light: the illumination that detects house interior light by illuminance transducer, the value that illuminance transducer detects is carried out the A/D conversion, by microprocessor measured value is compared with predefined brightness value, variant such as actual value and preset value, then automatically regulate lamplight brightness, make it to satisfy the requirement of room illumination.The light fixture node mainly is comprised of microprocessor, wireless communication module and lighting control module.

Software platform mainly contains and operates in two kinds of intelligent lighting control algolithms on the node, and the Zigbee protocol of networking and data communication between the node.Two kinds of nodes form a wireless network by ZigBee, and collaborative work realizes the monitoring of environment and the adjusting control of light mutually.

Beneficial effect of the present invention is mainly manifested in: 1), can reduce greatly on the cost; 2), system adopts ZigBee to carry out radio communication fully, reliability ratio is higher; 3), system adopts wireless mode, and is easy for installation, can not destroy original illuminator and install, and reduced the renovation cost; 4, promoted intelligent degree.

Description of drawings

Fig. 1 is the structured flowchart of illumination power saving system.

Fig. 2 is the block diagram of wireless sensor node.

Fig. 3 is the block diagram of light fixture node.

Fig. 4 is the schematic diagram of the light control of the demonstration among Fig. 3.

Fig. 5 is the schematic diagram that patent working of the present invention is installed.

Fig. 6 is the schematic diagram that ceiling is incorporated into working face.

Fig. 7 is the residential quarter situation schematic diagrames that cover more.

Fig. 8 is the schematic diagram of light fixture node in a plurality of light modulations district.

Embodiment

The invention will be further described below in conjunction with accompanying drawing.

With reference to Fig. 1～Fig. 8, a kind of illumination power saving system based on wireless sensor network, comprise realizing the people detection, illuminance detection wireless sensor node 100 and realize the light fixture node 200 that lamp brightness is regulated on the light fixture in order to be installed in, wherein,

Described wireless sensor node 100 comprises main control microprocessor, infrared sensor, illuminance sensor, A/D modular converter and the first wireless communication module, described infrared sensor is connected with described main control microprocessor with illuminance sensor, described main control microprocessor connects the A/D modular converter, and described A/D modular converter connects the first wireless communication module;

Described light fixture node 200 comprises light fixture microprocessor, lighting control module and the second wireless communication module, described light fixture microprocessor connects described lighting control module, described the first wireless communication module and the communication connection of described the second wireless communication module, described the second wireless communication module is connected with described light fixture microprocessor;

Described main control microprocessor comprises:

Light fixture is opened control unit, is used for when receiving the signal of infrared sensor, as detects people from room arranged, and then sends and opens the light fixture instruction; Otherwise, send the instruction of turn-offing light fixture; Default illuminance is calculated the unit, and in order to calculate the lamp light-regulating index, described light modulation index is corresponding one by one with default illuminance value, and computational process is:

Set the positional information, user of light fixture node to the requirements E of indoor light intensity _Sat, light modulation district Z _DimZone radius l _SatWith light fixture range of exposures Z _Lamp, whole lamp control working face is divided into a plurality of square residential quarters, and described square residential quarter is less than described light modulation district Z _Dim, light modulation district Z _DimIn have a plurality of square residential quarters to exist, according to zone radius l _SatDetermine;

Determine the current square residential quarter of people present position, according to light modulation district Z _DimEach interior square residential quarter is with the horizontal span l of each square residential quarter apart from the current square residential quarter of human body present position _ColWith vertical span l _RowObtain described horizontal span l _ColWith vertical span l _RowAll with the number of rectangular cells lattice as unit, with m=l _Col+ l _RowDeposit in by among the array L of position, array E is generated by the L conversion, reads the element L of one of them array L _iValue m, E _i=(0.8) ^mE _Sat

When a plurality of users are movable in contiguous residential quarter, a residential quarter may appear by a plurality of light modulations zone Z _DimCover, can cause like this some residential quarter bright especially, our concept that proposes coverage solves this situation here.The position of the residential quarter of calculation level and user's residential quarter, place apart from s, the coverage that we calculate

(R _l, R _wLength and width for the room);

People residing position Q (x, y), the coordinate of light fixture are P (x _i, y _i), the setting height(from bottom) of light fixture is to be h, and single light source illumination affects array A, and single light source illumination affects the elements A among the array A ⁱ:

Wherein, I _θThe luminous intensity of light source on the θ angular direction; This value can obtain in the illuminance curve, and every kind of light fixture has different not light curves;

If each lamp light-regulating index is d _i, whole lamp control working face has k small cup lamp, finds the solution d _i:

$\left\{\begin{array}{c}E=\mathrm{Ad}\\ \min \left|\right|d\left|\right|\\ 0<d<1\end{array}\right.$

Wherein, $E=\underset{i=1}{\overset{k}{\mathrm{\&Sigma;}}}{d}_i{A}^i=\underset{1}{\overset{k}{\mathrm{\&Sigma;}}}{d}_i\left\{A^i\right[0],\&CenterDot;\&CenterDot;\&CenterDot;,A^i[l_{\mathrm{vector}}\left]\right\},$ Substitution array E, array A ⁱChange:

$E=\left[\begin{array}{cccc}{A}^1\left[0\right],& A^2\left[0\right],& ......,& A^k\left[0\right]\\ ..........& & & \\ A^1\left[l_{\mathrm{vector}}\right],& A^2\left[l_{\mathrm{vector}}\right],& ......,& A^k\left[l_{\mathrm{vector}}\right]\end{array}\right]d=\mathrm{Ad}$

||d|| ₁＝|d ₁|+|d ₂|+...+|d _k|；

The d that obtains _iBe each lamp light-regulating index;

The lamp brightness regulon is used for accepting the illuminance signal that illuminance sensor detects, and measured value and default illuminance value are compared, and sends and regulates lamp brightness to the instruction of setting illuminance value.

Described default illuminance is calculated in the unit, and the light fixture node is received a plurality of light modulation indexes, with each d that successively receives _IkValue is found the solution mean value,

K is the number of light modulation index, this mean value

Output valve for the lamp light-regulating index.

Described the first wireless communication module and the second wireless communication module are all in accordance with the ZigBee wireless communication protocol.

As shown in Figure 1, a kind of illumination power saving system that makes up with radio sensing network mainly is comprised of radio sensing network illumination power-saving device and this two large divisions of software platform.The radio sensing network illumination power-saving device consists of whole network by two kinds of different nodes---wireless sensor node (seeing Fig. 2) and light fixture node (seeing Fig. 3).The experiment implementation process adopts the LED of 1W to carry out light modulation as light fixture, brightness adjustment control principle such as Fig. 4.The scheme of installation of two kinds of nodes is seen accompanying drawing 5, and wireless sensor node is installed on the working face, and the light fixture node installation is on ceiling.

Specific implementation process is as follows:

System according to Fig. 5 installs, and can determine the positional information of each node; Default user is to the requirements E of indoor light intensity again _Sat, light modulation district Z _DimZone radius l _SatWith light fixture range of exposures Z _Lamp

After detecting someone and entering into the room, the infrared sensor among Fig. 2 detects the people, and then the value according to illuminance sensor judges whether light modulation, needs light modulation just to trigger the work of light fixture node; Then constructing light fixture node optical illumination affects array and user's request illumination array, lists system of linear equations and calculates the light modulation index.The light fixture node comes light fixture is controlled according to the light modulation index, and experiment selects the LED of 1W to throw light on.

Fig. 6 is the schematic diagram that ceiling is incorporated into working face, the computational process of light modulation index d:

1, user's request illumination array E generates,

At first determine people present position, then light modulation district Z _DimInterior residential quarter is with the horizontal span l of this residential quarter apart from the human body present position _ColWith vertical span l _RowObtain, with m=l _Col+ l _RowDeposit in by among the array L of position.

Array E is generated by the L conversion, reads L _iValue m, E then _i=(0.8) ^mE _Sat

When the multi-user is movable in contiguous residential quarter, a residential quarter can appear by a plurality of light modulations zone Z _DimCover, can cause like this some residential quarter bright especially, our concept that proposes coverage solves this situation here.Fig. 7 is the residential quarter situation schematic diagrames that cover more, the position of the residential quarter of calculation level and user's residential quarter, place apart from s, the coverage of our calculating

(R _l, R _wLength and width for the room).

2, single light source illumination affects array A generation

Because light fixture is according to range of exposures Z _LampCan determine the residential quarter that it has influence on, the light fixture node calculates the brightness value of this lamp on the residential quarter that has influence on, if residential quarter, place, the residing position of people is at light fixture range of exposures Z _LampOutside, brightness value is set to 0; If residential quarter, place, the residing position of people is at light fixture range of exposures Z _LampWithin, carry out following calculating:

The coordinate of the light fixture that calculation level position Q (x, y), P are ordered is P (x _i, y _i), and the setting height(from bottom) of light fixture is the known h that is, the brightness value A of this point ⁱComputational process: according to formula A ⁱ=I _θ/ l ²=I _θ/ h ²* cos ²θ, s are the horizontal displacement of calculation level and light fixture, and geometry calculates $s\sqrt{{(x-x_i)}^2+{(y-y_i)}^2},$ So $l=\sqrt{s^2+h^2}.$ And $\cos \mathrm{\&theta;}=\frac{h}{l}$ Just can very fast having obtained.Obtain $\cos \mathrm{\&theta;}=\frac{h}{\sqrt{{(x-x_i)}^2+{(y-y_i)}^2+h^2}},$ Substitution A ⁱ=I _θ/ l ²=I _θ/ h ²* cos ²θ at last can be in the hope of A ⁱValue. $A^i=\frac{I_{\mathrm{\&theta;}}}{h[{(x-x_i)}^2+{(y-y_i)}^2+h^2]}.$

3, the calculating of lamp light-regulating index d

If each lamp light-regulating index is d _i, k small cup lamp is arranged in this scope, the below finds the solution d _i

$E=\underset{i=1}{\overset{k}{\mathrm{\&Sigma;}}}{d}_i{A}^i=\underset{1}{\overset{k}{\mathrm{\&Sigma;}}}{d}_i\left\{A^i\right[0],\&CenterDot;\&CenterDot;\&CenterDot;,A^i[l_{\mathrm{vector}}\left]\right\},$ Substitution array E, array A ⁱChange:

$E=\left[\begin{array}{cccc}{A}^1\left[0\right],& A^2\left[0\right],& ......,& A^k\left[0\right]\\ ..........& & & \\ A^1\left[l_{\mathrm{vector}}\right],& A^2\left[l_{\mathrm{vector}}\right],& ......,& A^k\left[l_{\mathrm{vector}}\right]\end{array}\right]d=\mathrm{Ad}$

Algorithm target according to us is economize on electricity, and the summation of light modulation index d is exactly the situation that is representing economize on electricity, so need only the single order norm with array d || and d|| ₁=| d ₁|+| d ₂|+...+| d _k| minimizing is exactly our result who tries to achieve, and problem just converts the solution linear equation to $\left\{\begin{array}{c}E=\mathrm{Ad}\\ \min \left|\right|d\left|\right|\\ 0<d<1\end{array}\right..$

Fig. 8 light fixture node is in a plurality of light modulations district, and three user A, B, C are in the different residential quarters simultaneously, after the d value that the wireless sensor node in the residential quarter solves from top algorithm, the light modulation value of each light fixture is issued light fixture node C _i, and the C among the figure ₁Priority is received 3 light modulation exponential quantities, C ₂, C ₃, C ₄Receive 2 values, this will go to adjust this value and then export.

System is with the d that successively receives _IkValue is found the solution mean value,

Then the light fixture node is controlled.

Claims (3)

1. illumination power saving system based on wireless sensor network, it is characterized in that: described illumination power saving system comprise realizing the people detection, illuminance detection wireless sensor node and realize the light fixture node that lamp brightness is regulated on the light fixture in order to be installed in, wherein

Described wireless sensor node comprises main control microprocessor, infrared sensor, illuminance sensor, A/D modular converter and the first wireless communication module, described infrared sensor is connected with described main control microprocessor with illuminance sensor, described main control microprocessor connects the A/D modular converter, and described A/D modular converter connects the first wireless communication module;

Described light fixture node comprises light fixture microprocessor, lighting control module and the second wireless communication module, described light fixture microprocessor connects described lighting control module, described the first wireless communication module and the communication connection of described the second wireless communication module, described the second wireless communication module is connected with described light fixture microprocessor;

Described main control microprocessor comprises:

Light fixture is opened control unit, is used for when receiving the signal of infrared sensor, as detects people from room arranged, and then sends and opens the light fixture instruction; Otherwise, send the instruction of turn-offing light fixture;

Default illuminance is calculated the unit, and in order to calculate the lamp light-regulating index, described light modulation index is corresponding one by one with default illuminance value, and computational process is:

Set the positional information, user of light fixture node to the requirements E of indoor light intensity _Sat, light modulation district Z _DimZone radius l _SatWith light fixture range of exposures Z _Lamp, whole lamp control working face is divided into a plurality of square residential quarters, and described square residential quarter is less than described light modulation district Z _Dim

Determine the current square residential quarter of people present position, according to light modulation district Z _DimEach interior square residential quarter is with the horizontal span l of each square residential quarter apart from the current square residential quarter of human body present position _ColWith vertical span l _RowObtain described horizontal span l _ColWith vertical span l _RowAll with the number of rectangular cells lattice as unit, with m=l _Col+ l _RowDeposit in by among the array L of position, array E is generated by the L conversion, reads the element L of one of them array L _iValue m, E _i=(0.8) ^mE _Sat

People residing position Q (x, y), the coordinate of light fixture are P (x _i, y _i), the setting height(from bottom) of light fixture is to be h, and single light source illumination affects array A, and single light source illumination affects the elements A among the array A ⁱ:

Wherein, I _θThe luminous intensity of light source on the θ angular direction;

If each lamp light-regulating index is d _i, whole lamp control working face has k small cup lamp, finds the solution d _i:

$\left\{\begin{array}{c}E=\mathrm{Ad}\\ \min \left|\right|d\left|\right|\\ 0<d<1\end{array}\right.$

Wherein, $E=\underset{i=1}{\overset{k}{\mathrm{\&Sigma;}}}{d}_i{A}^i=\underset{1}{\overset{k}{\mathrm{\&Sigma;}}}{d}_i\left\{A^i\right[0],\&CenterDot;\&CenterDot;\&CenterDot;,A^i[l_{\mathrm{vector}}\left]\right\},$ Substitution array E, array A ⁱChange:

$E=\left[\begin{array}{cccc}{A}^1\left[0\right],& A^2\left[0\right],& ......,& A^k\left[0\right]\\ ..........& & & \\ A^1\left[l_{\mathrm{vector}}\right],& A^2\left[l_{\mathrm{vector}}\right],& ......,& A^k\left[l_{\mathrm{vector}}\right]\end{array}\right]d=\mathrm{Ad}$

||d|| ₁＝|d ₁|+|d ₂|+...+|d _k|；

The d that obtains _iBe each lamp light-regulating index;

The lamp brightness regulon is used for accepting the illuminance signal that illuminance sensor detects, and measured value and default illuminance value are compared, and sends and regulates lamp brightness to the instruction of setting illuminance value.

2. the illumination power saving system based on wireless sensor network as claimed in claim 1 is characterized in that: described default illuminance is calculated in the unit, and the light fixture node is received a plurality of light modulation indexes, with each d that successively receives _IkValue is found the solution mean value,

K is the number of light modulation index, this mean value Output valve for the lamp light-regulating index.

3. the illumination power saving system based on wireless sensor network as claimed in claim 1 or 2, it is characterized in that: described the first wireless communication module and the second wireless communication module are all in accordance with the ZigBee wireless communication protocol.

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