CN202889721U - Intelligent remote wireless street-lamp monitoring system - Google Patents

Abstract

The utility model discloses an intelligent remote wireless street-lamp monitoring system, comprising at least one street lamp detection and control unit, which is respectively connected with each street lamp to detect the state information of each street lamp and control the illumination mode of each street lamp according to a control instruction from a remote monitoring server; at least one wireless coordinator, which is connected with a wireless sensor network that is formed by the street lamp detection and control units on the same street lamp line, so as to transmit, to the remote monitoring server, the state information of each street lamp that is detected and obtained by each street lamp detection and control unit in real time; and the remote monitoring server, which is in communication connection with the wireless coordinator to control the illumination mode of each street lamp according to the state information of each street lamp. According to the utility model, the ZigBee network is adopted to acquire the working state information of each street lamp in real time, and the remote monitoring server is connected through GPRS wireless communication, so that remote intelligent monitoring of city street lamps is realized, and the intelligent remote wireless street-lamp monitoring system achieves wide application prospect.

Description

The intelligent remote wireless Street Lamp Monitor System

Technical field

The present invention relates to a kind of Street Lamp Monitor System, especially a kind of intelligent remote wireless Street Lamp Monitor System.

Background technology

At present, energy problem has become a significant problem of restriction World Economics sustainable development.How to realize efficiently that energy-saving and emission-reduction, exploitation regenerative resource have become the focus of global concern.Simultaneously, along with the propelling of urbanization process, urban road, nightscape lighting have become the representative of urban culture.In the process that advances the city lighting engineering, city illumination, lamp decoration engineering etc. comes into one's own gradually, and the energy-saving and emission-reduction of street lighting and Based Intelligent Control also become trend of the times.

At present, the city street lamp monitoring management level of domestic city is also very low, normally adopts the mode of team control, group control and manual inspection, so not only wastes time and energy, can't in time get rid of street lamp fault, bring very large difficulty for administering and maintaining of urban lighting system.

In the city street lamp management, the important indicator of " bright light rate " is arranged, this index is the important evidence that authorities examine road lamp management unit.Conventional art adopts line load electric current or power to assess the bright light rate.Because some uncertain factors that fluctuation, the light source voltage-current characteristic of line voltage distribution are non-linear and light fixture wears out to be brought etc., traditional appraisal procedure is very inaccurate.

The street lamp control system in a lot of cities also rests on manual state of a control, not only waste time and energy, but also often can not guarantee street lamp 100% ground light, sometimes day bright and lamp is also entirely bright, can not realize intelligent automatic control, waste the useful life of power supply and street lamp.

Along with the development of digital communication and computer technology, the networking of wireless technology, standardization require to engender that in face of people ZigBee technology is one of them.ZigBee technology is according to a kind of short distance of IEEE 802.15.4 standard, low complex degree, low-power consumption, low data rate, radio network technique cheaply, be mainly used in the short-range and various electronic equipments that message transmission rate is not high between, between thousands of small transducers, mutually coordinate to realize communication.

Along with going deep into of Chinese Urbanization construction, large-and-medium size cities have begun intelligent management, and various countries add the ranks in intelligent city, wisdom city one after another.In the society of energy scarcity, need to have the HDL wireles intelligent lighting control system of the high-efficiency environment friendly supporting with it, require obtaining with control mode of lighting apparatus information accomplished long-range, intellectuality.The Lighting Design of modern Smartway has been not only the Lighting Design of certain bar road or highway, but the streetlight monitoring in whole city.Each road street lamp can adopt respectively independent loop power supply, can according to different needs, carry out separately control, saves energy to street lamp everywhere like this.

Therefore, need a kind of street lamp control system that can satisfy intelligent remote monitoring of exploitation badly, to satisfy the requirement of intelligent city's construction and energy-conserving and environment-protective.

Summary of the invention

The objective of the invention is: provide a kind of intelligent remote wireless Street Lamp Monitor System, by the convenient operating state of monitoring in real time street lamp of wireless network.

For achieving the above object, the technical solution used in the present invention is:

A kind of intelligent remote wireless Street Lamp Monitor System comprises:

At least one street lamp detects and control device, is connected with each street lamp respectively, for detection of the state information of each street lamp and control the light illumination mode of each street lamp according to the control command of remote monitoring server;

At least one wireless telegon, is connected with the wireless sensor network that street lamp on the same public lighting circuit detects and control device forms, the state information that is used for each street lamp detection and control device are detected in real time each street lamp of acquisition sends the remote monitoring server to;

The remote monitoring server with described wireless telegon communication connection, is used for according to the state information of each street lamp the light illumination mode of street lamp being controlled.

Preferably, described street lamp detects and control device comprises the ZigBee controller, and the input of described ZigBee controller is connected with a light sensor, and output is connected with the dimming driving circuit for the light illumination mode of control street lamp.

Preferably, described wireless telegon comprises main controller, GPRS module and ZigBee module, wherein:

The ZigBee module, is connected with the wireless sensor network that street lamp on the same public lighting circuit detects and control device forms, is used for receiving from street lamp and detects and control device detects the state information of the street lamp that obtains and transmits control command from the remote monitoring server to street lamp detection and control device down;

The GPRS module is with the wireless connections of described remote monitoring server;

Main controller is connected with described ZigBee module and GPRS module respectively.

Preferably, the input of described ZigBee module also is connected with light sensor, and output is connected with the dimming driving circuit for the light illumination mode of control street lamp.

Preferably, described dimming driving circuit is the BUCK type current control circuit of PID control.

Preferably, described remote monitoring server also communication link be connected to monitor client.

Preferably, described monitor client is the mobile radio terminal that is connected with the wireless telecommunications of remote monitoring server.

The invention has the beneficial effects as follows: intelligent remote wireless Street Lamp Monitor System of the present invention, utilize the work state information of each street lamp of ZigBee-network Real-time Collection, and be connected with the remote monitoring server by the GPRS wireless telecommunications, realized long-range intelligent monitoring, be convenient to detect in real time the fault state of street lamp, and by the collection to the street lamp state information, be convenient to optimize the light illumination mode of street lamp, to reach the purpose of energy savings, the intelligence of street lamp and the combination of remote monitoring have really been realized, reliability is high, has a extensive future.

Description of drawings

Fig. 1 is the structural representation of intelligent remote wireless Street Lamp Monitor System of the present invention;

Fig. 2 is the functional-block diagram of street lamp detection of the present invention and control device;

Fig. 3 is the functional-block diagram of the wireless telegon of the present invention;

Fig. 4 is intelligent remote wireless Street Lamp Monitor System data transmission procedure schematic diagram of the present invention;

Fig. 5 is the structured flowchart of intelligent remote wireless Street Lamp Monitor System preferred embodiment of the present invention;

Fig. 6 is the BUCK type current control circuit illustraton of model of controlling based on PID among the present invention;

Fig. 7 is slope compensation and inductive current oscillogram;

Fig. 8 is closed-loop model figure

System's open-loop transfer function Bode diagram when Fig. 9 is uncompensated;

Figure 10 is PID regulating and controlling circuit diagram;

Figure 11 is PID compensating network transfer function Bode diagram.

Embodiment

The invention will be further described below in conjunction with accompanying drawing and preferred embodiment, and the present invention is being controlled to be example to the LED street lamp, but embodiments of the present invention are not limited to this.

Intelligent remote wireless Street Lamp Monitor System of the present invention, broken through existing street lamp regularly, the limitation of wired and team control etc., adopt the energy-conservation control theory of two-stage.The first order by LED street light modulating drive circuit, reduces the energy resource consumption of street lamp greatly, realizes the energy-saving and cost-reducing of city illumination; The second level, employing is based on the long distance control system of ZigBee and GPRS wireless communication technique, adopt monitoring and the control strategy of intelligence, realization is to the remotely intelligently monitoring of city street lamp system, the street lamp of fixing a breakdown in real time, ensure " the bright light rate " of street lamp, the wrong bright light when stopping daytime, thus realize for the second time energy-conservation.

With reference to Fig. 1, a kind of intelligent remote wireless Street Lamp Monitor System comprises:

At least one street lamp detects and control device 10, is connected with each street lamp respectively, for detection of the state information of each street lamp and control the light illumination mode of each street lamp according to the control command of remote monitoring server 30;

At least one is wireless telegon 20, be connected with the wireless sensor network that street lamp detects and control device 10 forms on the same public lighting circuit, be used for sending each street lamp detection and the control device 10 real-time state informations that detect each street lamp that obtains to remote monitoring server 30;

Remote monitoring server 30 with described wireless telegon 20 communication connections, is used for according to the state information of each street lamp the light illumination mode of street lamp being controlled.The bright light rate that the remote monitoring server can also calculate, adds up, inquire about each street according to the state information of the individual street lamp collected.

With reference to Fig. 2, described street lamp detects and control device 10 comprises ZigBee controller 11, and the input of described ZigBee controller 11 is connected with a light sensor 12, and output is connected with the dimming driving circuit 13 for the light illumination mode of control street lamp.

Need to prove, ZigBee technology be a kind of emerging closely, low complex degree, low-power consumption, low data rate, radio network technique cheaply, be mainly used near radio and connect.Node in the ZigBee-network not only itself can be used as monitored object, and for example its transducer that connects directly carries out data acquisition and monitoring, and other network node of transfer passes the data information of coming automatically.Like this, street lamp detects and control device 10 both can be used as individual node in the ZigBee-network, also can become that other street lamps of transfer detect and the via node of the state information of the street lamp that control device 10 detects, thereby enlarges the scale of whole ZigBee-network.Because the usually effective transmission range of ZigBee-network is in 100 meters, and the distance between adjacent two street lamps generally can be above 50 meters on the same circuit, the control command that need to transmit and state information industry are seldom, therefore, ZigBee technology can satisfy the needs of street lamp single-lamp control fully, and can any place street lamp on the same circuit be detected and control by the ZigBee-network that street lamp detects and the relay transmission of control device 10 forms.The ad hoc network of ZigBee-network has also satisfied the reliability requirement of transfer of data.

In concrete practical application, the street lamp that this supervisory control system is monitored is the LED street lamp, because LED is as the high efficiency semiconductor lighting source, have the advantages such as long-life, energy-conserving and environment-protective, rich color, microminiaturization, it progressively substitutes traditional fluorescent lamp, incandescent lamp, becomes the energy-saving and environmental protection type illuminating product that 21 century has development prospect most.So the present invention describes take the LED street lamp as example.

ZigBee controller 11 adopts ZigBee chip CC2530, and light sensor 12 gathers the brightness of LED street lamps, judges whether the work of LED street lamp is unusual, and by ZigBee chip CC2530 the state information of street lamp is sent to wireless telegon 20 in real time.ZigBee chip CC2530 receives the control command from remote monitoring server 30, changes the brightness that the LED street lamp control mouthful PWM ripple of exporting changes street lamp by dimming driving circuit 13, thus the light illumination mode of control LED street lamp.

With reference to Fig. 3, described wireless telegon 20 comprises main controller 21, GPRS module 23 and ZigBee module 22, wherein:

ZigBee module 22 adopts ZigBee chip CC2530, detect with street lamp on the same public lighting circuit and wireless sensor network that control device 10 forms is connected, be used for receiving from street lamp and detect and control device 10 detects the state information of the street lamp that obtains and transmits control command from remote monitoring server 30 to street lamp detection and control device 10 down;

GPRS module 23 adopts SIMCOM companies to produce the SIM300 modules, with described remote monitoring server 30 through Internet connection;

Main controller 21 adopts two serial-port Single-chip STC 12LE5A60S2, is connected with described ZigBee module 22 and GPRS module 23 respectively.The state information that main controller 21 receives from each LED street lamp of ZigBee-network through ZigBee module 22 on the one hand, and the state information that receives passed to remote monitoring server 30 with Internet connection through GPRS module 23; On the other hand, the control command that GPRS module 23 receives from remote monitoring server 30, and be passed to ZigBee-network through ZigBee module 22, the residing street lamp of each street lamp detects and control device 10 receives control command by inner ZigBee controller 11, and triggers the light illumination mode of dimming driving circuit 13 control LED street lamps.

The data transmission procedure of whole supervisory control system as shown in Figure 4.With reference to Fig. 5, each street lamp is as routing node in the Zigbee network or terminal equipment node, with real-time the sending in the wireless telegon 20 in the Zigbee network of the situation of self, by GPRS network data are sent to the real-time demonstration that long-range remote monitoring server 30 carries out the street lamp situation by Zigbee network again.By the whole LED road lamp system of the procedure auto-control on the remote monitoring server 30.

Preferably, the input of the ZigBee module 22 in the wireless telegon 20 also is connected with light sensor 12, and output is connected with the dimming driving circuit 13 for the light illumination mode of control street lamp.Like this, wireless telegon 20 is installed on the LED street lamp, can also gather separately the luminance state information of LED street lamp and the light illumination mode of LED street lamp is controlled.

In actual applications, can also be connected with monitor client with the remote monitoring server 30 of Internet connection, can check like this state information of the LED street lamp that remote monitoring server 30 receives by monitor client, judge whether the LED street lamp works everywhere, and can be by the light illumination mode of monitor client Long-distance Control LED street lamp, described monitor client can be PC, can also mobile radio terminal, and such as mobile phone, PDA etc.

The dimming driving circuit of traditional LED street lamp all adopts the control mode of pure hardware, and only the switch by PWM control MOSFET achieves the goal.Dimming driving circuit 13 is preferably the BUCK type current control circuit based on PID control among the present invention, use the soft and hardware method, on the basis of existing PWM control, by the accurate detection angle of flow, accomplish accurate stepless adjustment, have the advantages that starting resistor is low, conversion efficiency is high.

Fig. 6 be among the present invention based on the illustraton of model of the BUCK type current control circuit of PID control, with reference to Fig. 6, according to the PID control principle, can list following formula:

$G_{\mathrm{CM}}=\frac{R_3}{R_1+R_2}---\left(1\right)$

$V_{\mathrm{CP}}=K_P\·[(V_{\mathrm{ref}}-V_{\mathrm{Rs}})+\frac{1}{T_i}{\∫}_0^{T_s}(V_{\mathrm{ref}}-V_{\mathrm{Rs}})\mathrm{dt}+T_d\frac{d(V_{\mathrm{ref}}-V_{\mathrm{Rs}})}{\mathrm{dt}}]---\left(2\right)$

When differentiation element was zero, in a switch periods, when system was in stable state, the steady-state error that detects the electric current of resistance was zero, can draw following formula:

$\frac{K_P}{T_i}\·{\∫}_0^{T_s}(V_{\mathrm{ref}}-V_{\mathrm{Rs}})\mathrm{dt}=0---\left(5\right)$

$\frac{K_P}{T_i}\·\{{\∫}_0^{{\mathrm{DT}}_s}(V_{\mathrm{ref}}-V_{\mathrm{Rs}})\mathrm{dt}+{\∫}_{{\mathrm{DT}}_s}^{T_s}(V_{\mathrm{ref}}-0)\mathrm{dt}\}=0---\left(4\right)$

Can be got by formula (3) and formula (4) abbreviation:

$\frac{K_P}{T_i}\·{\∫}_0^{{\mathrm{DT}}_s}{V}_{\mathrm{Rs}}\mathrm{dt}=T_s{V}_{\mathrm{ref}}---\left(5\right)$

Can be found out that by formula (5) time of Current Control is in the interval of switch conduction, the electric current in the time of namely can be by the conducting of control switch pipe is finished the Current Control of one-period.The below sets forth the design based on the peak current control circuit of PID:

Slope compensation as shown in Figure 7 and inductance control current i _C(t) current waveform figure, after adding slope compensation in the circuit, inductance peak current value i when switching tube is opened _L(t) no longer equal to control current i _C(t), both differences are m _aDT _SM wherein _aFor adding the slope of offset current waveform.At [0, dT _S] and [dT _S, T _S] in the interval, i _L(t) peak value and the difference of its mean value are m ₁DT _S/ 2 and m ₂D/T _S/ 2.M wherein ₁=(V _S-V _F-V)/2, m ₂=(V-V _F)/2, V _SBe input voltage, V _FBe the voltage source of LED equivalence, V is output voltage.Can get the mean value of inductive current ripple: (m ₁d ²T _S+ m ₂d ^{/ 2}T _S)/2.

So the mean value of inductive current is:

${<i_L\left(t\right)>}_{T_s}={<i_c\left(t\right)>}_{T_s}-m_a{\mathrm{dT}}_s-\frac{m_1{d}^2{T}_s}{2}-\frac{m_2{d}^{\&prime;2}{T}_s}{2}---\left(6\right)$

Following variable is introduced the small-signal disturbance:

${<i_L\left(t\right)>}_{T_s}=I_L+{\hat{i}}_L\left(t\right)$ ${<i_c\left(t\right)>}_{T_s}=I_c+{\hat{i}}_c\left(t\right)$ $d\left(t\right)=D+\hat{d}\left(t\right)$

${\mathrm{<figure-callout\; id="1"\; label="m"\; filenames="HDA00002260511200032.png,HDA00002260511200041.png"\; state="\{\{state\}\}">m</figure-callout>}}_1={\mathrm{<figure-callout\; id="1"\; label="M"\; filenames="HDA00002260511200032.png,HDA00002260511200041.png"\; state="\{\{state\}\}">M</figure-callout>}}_1+{\hat{m}}_1\left(t\right)$ ${\mathrm{<figure-callout\; id="2"\; label="m"\; filenames="HDA00002260511200032.png"\; state="\{\{state\}\}">m</figure-callout>}}_2={\mathrm{<figure-callout\; id="2"\; label="M"\; filenames="HDA00002260511200032.png"\; state="\{\{state\}\}">M</figure-callout>}}_2+{\hat{m}}_2\left(t\right)---\left(7\right)$

Formula (7) substitution formula (6) can be drawn formula (8):

${\hat{i}}_L\left(t\right)={\hat{i}}_c\left(t\right)-(M_a{T}_s-{\mathrm{DM}}_1{T}_s-D^{\&prime;}{M}_2{T}_s)\hat{d}\left(t\right)-\frac{{\hat{m}}_1\left(t\right)D^2{T}_s}{2}-\frac{{\hat{m}}_2\left(t\right)d^{\&prime;2}{T}_s}{2}---\left(8\right)$

Abbreviation gets:

${\hat{i}}_L\left(t\right)={\hat{i}}_c\left(t\right)-M_a{T}_s\hat{d}\left(t\right)-\frac{{\hat{m}}_1\left(t\right)D^2{T}_s}{2}-\frac{{\hat{m}}_2\left(t\right)d^{\&prime;2}{T}_s}{2}---\left(9\right)$

Can be got by formula (9):

$\hat{d}\left(t\right)=\frac{1}{M_a{T}_s}({\hat{i}}_c\left(t\right)-{\hat{i}}_L\left(t\right))\frac{{\hat{m}}_1\left(t\right)D^2{T}_s}{2}-\frac{{\hat{m}}_2\left(t\right)d^{\&prime;2}{T}_s}{2}---\left(10\right)$

Because the parametric variable in the control circuit all be with the form of voltage as the control parameter, so iL (t) and iC (t) can be expressed as respectively:

$i_L\left(t\right)=\frac{V_{\mathrm{Rs}}\left(t\right)}{R_s}---\left(11\right)$

$i_c\left(t\right)=\frac{V_{\mathrm{ref}}}{R_s}---\left(12\right)$

By the definition of formula (11) and formula (12), formula (10) linearisation can be expressed as:

$\hat{d}\left(t\right)=k_m[{\hat{v}}_{\mathrm{ref}}\left(t\right)-{\hat{v}}_{\mathrm{Rs}}\left(t\right)-k_s{\hat{v}}_s\left(t\right)-k_v\hat{v}\left(t\right)]---\left(13\right)$

Wherein:

$k_m=\frac{1}{M_a{T}_s{R}_s};$ $k_s=\frac{{\mathrm{<figure-callout\; id="2"\; label="D"\; filenames="HDA00002260511200032.png"\; state="\{\{state\}\}">D</figure-callout>}}^2}{2L{R}_s};$ $k_v=\frac{(1-2D)}{{2\mathrm{LR}}_s}$

According to above-mentioned analysis, can obtain based on the small-signal closed-loop model of the BUCK type current control circuit of PID control as shown in Figure 8.

Can be got the frequency-domain expression of each parametric variable by Fig. 8:

Open-loop transfer function is:

$T\left(s\right)=\frac{G_c{K}_m{G}_m{G}_{\mathrm{vd}}H\left(s\right)}{1+K_v{K}_m{G}_m{G}_{\mathrm{vd}}\left(s\right)}---\left(14\right)$

Output voltage is:

$\hat{v}={\hat{v}}_{\mathrm{ref}}\&CenterDot;\frac{{\mathrm{KG}}_c{G}_m\left(s\right)G_{\mathrm{rd}}\left(s\right)}{1+T\left(s\right)}+{\hat{v}}_s\&CenterDot;\frac{G_{\mathrm{vs}}\left(s\right)}{1+T\left(s\right)}+{\hat{i}}_{\mathrm{lond}}\&CenterDot;\frac{Z_{\mathrm{out}}\left(s\right)}{1+T\left(s\right)}---\left(15\right)$

Transfer function G _VS(S):

${\frac{\hat{v}\left(s\right)}{{\hat{v}}_s\left(s\right)}|}_{{\hat{v}}_{\mathrm{ref}}=0}=\frac{G_{\mathrm{vs}}-K_s{K}_m{G}_{\mathrm{<figure-callout\; id="1"\; label="m\; G\; vd"\; filenames="HDA00002260511200032.png,HDA00002260511200041.png"\; state="\{\{state\}\}">m</figure-callout>}}{G}_{\mathrm{vd}}{}_{}}{1+K_v{K}_m{G}_m{G}_{\mathrm{vd}}+K_m{G}_c{G}_m{G}_{\mathrm{vd}}H\left(s\right)}---\left(16\right)$

Closed loop transfer function:

${\frac{\hat{v}\left(s\right)}{{\hat{v}}_{\mathrm{ref}}\left(s\right)}|}_{\begin{array}{c}{\hat{v}}_s=0\\ {\hat{i}}_{\mathrm{lond}}=0\end{array}}=\frac{1}{H\left(s\right)}\frac{T\left(s\right)}{1+T\left(s\right)}---\left(17\right)$

According to the direct voltage output of chopping depressuring circuit, input voltage V in the peak electricity flow pattern Buck converter as can be known _S=100V establishes output LED load voltage V _o=35V, switching frequency f=100KHz, load current I=350mA, inductive current ripple peak-to-peak value I _Pp=70mA, L=2mH detects resistance R _S=0.8 Europe, switching tube S ₁Select N channel power MOS FET IRF840AS, open resistance R _On=0.85 Ω, I _D=6.0A.The design procedure of control circuit is as follows:

(1), determines H (s)

Detect resistance R in the circuit _S=0.8 Ω, rated current is 350mA, so V _Sen=0.36V gets V _Ref=V _SenSo=0.36V is H (s)=V _Ref/ V _Sen=1.

(2) determine transfer function people G _Vd(S)

$D=\frac{V_{\mathrm{LED}}+E_{\mathrm{LED}}\&CenterDot;I}{V_s}=0.35---\left(18\right)$

$G_m=\frac{1}{M_a{T}_S}---\left(19\right)$

$G_{\mathrm{vd}}=\frac{{\hat{v}}_{\mathrm{sen}}\left(s\right)}{\hat{d}\left(s\right)}=\frac{{\mathrm{DR}}_{\mathrm{LED}}{R}_s\mathrm{LCs}+2R_{\mathrm{LED}}({\mathrm{DV}}_s-V_{\mathrm{LED}})}{s^2{R}_s\mathrm{LC}+(L-2D{R}_{\mathrm{LED}}{R}_{s}C+R_{\mathrm{LED}}{R}_{s}C)s+D(R_{\mathrm{LED}}+2{\mathrm{DR}}_{\mathrm{LED}}+{\mathrm{DR}}_s)}---\left(20\right)$

The open-loop transfer function T of system (S) when (3) calculating without the PID control and compensation

During without the PID control and compensation, transfer function G _C(s)=1, substitution formula (16), the open-loop transfer function T of system (s) is when obtaining without the PID control and compensation:

$T\left(s\right)=H\left(s\right)\frac{K_m{G}_m{G}_{\mathrm{vd}}\left(s\right)}{1+K_V{K}_m{G}_m{G}_{\mathrm{vd}}\left(s\right)}=\frac{K_m{G}_m{G}_{\mathrm{vd}}\left(s\right)}{1+K_v{K}_m{G}_m{G}_{\mathrm{vd}}\left(s\right)}---\left(21\right)$

${\mathrm{<figure-callout\; id="0"\; label="T"\; filenames="HDA00002260511200032.png,HDA00002260511200041.png"\; state="\{\{state\}\}">T</figure-callout>}}_0=\frac{{2G}_m{K}_m}{R_{\mathrm{LED}}({\mathrm{DV}}_s-V_{\mathrm{LED}})}=3.27---\left(22\right)$

During without the PID control and compensation, as shown in Figure 9, can be tried to achieve by formula (21), the function cross-over frequency is 88763rad/sec, f=1.4x10 ⁴Hz, phase margin are T (jw)=35 °.

The design of PID control and compensation

The design of control and compensation circuit is the important component part of switch converters transient state design.(PD) control and compensation device is used for improving the bandwidth of phase margin and increase feedback loop in advance, suppresses high frequency components, and (PI) control and compensation device that lags behind is used for increasing the gain of low frequency ring, suppresses low-frequency excitation, makes steady-state error less.PID control and compensation device has been gathered the advantage of leading (PD) compensator and hysteresis (PI) compensator, during low frequency, increases the gain of low frequency ring, realizes the fine adjustment of output voltage low frequency component; During high frequency, improve phase margin.PID control and compensation device is compared with PI control and compensation device, except the advantage of the steady-state behaviour that has equally the raising system, also improving aspect the dynamic performance, has larger superiority.So in current inner loop, increase a pid correction control network, can reduce current fluctuation, accurately control the electric current of LED, have good load regulation characteristic.

PID regulating and controlling circuit diagram as shown in figure 10.

The transfer function of PID control and compensation device is:

$G_C=\frac{1+{\mathrm{sR}}_3{\mathrm{<figure-callout\; id="2"\; label="C"\; filenames="HDA00002260511200032.png"\; state="\{\{state\}\}">C</figure-callout>}}_2}{{\mathrm{<figure-callout\; id="2"\; label="sC"\; filenames="HDA00002260511200032.png"\; state="\{\{state\}\}">sC</figure-callout>}}_2}\&CenterDot;\frac{1+{\mathrm{sR}}_2{C}_1}{{\mathrm{<figure-callout\; id="1"\; label="R"\; filenames="HDA00002260511200032.png,HDA00002260511200041.png"\; state="\{\{state\}\}">R</figure-callout>}}_1+{\mathrm{<figure-callout\; id="2"\; label="R"\; filenames="HDA00002260511200032.png"\; state="\{\{state\}\}">R</figure-callout>}}_2+{\mathrm{sR}}_1{R}_2{C}_1}---\left(23\right)$

The cross-over frequency f of the transfer function behind the access control compensator _C1/10th of switching frequency, that is:

f _C=0.1f _S=10kHz。

As shown in Figure 10, the amplitude of system on the amplitude-frequency characteristic of 10KHz is-4.95, and phase margin is 41 degree.Suppose that phase margin is 60 degree behind the control and compensation, zero pole frequency computing formula is:

After the compensation, system's open-loop transfer function is

$T_v\left(s\right)=G_c\left(s\right)T\left(s\right)=T_c\frac{(1+\frac{s}{w_z})(1+\frac{w_L}{s})(1+\frac{s}{w})}{(1+\frac{s}{w_P})(1+\frac{s}{{\mathrm{Qw}}_o}+{\left(\frac{s}{w_o}\right)}^2)}---\left(26\right)$

Have formula (24) to (26) to know by inference:

$G_c\left(s\right)=\frac{4.73(1+\frac{s}{16838})(1+\frac{234491}{s})}{1+\frac{s}{367831}}---\left(37\right)$

Can calculate T _V=21.39.

Add the open-loop transfer function T of system after PID controls _V(s) be:

$T_v\left(s\right)=\frac{21.39\&times;(1+\frac{s}{1638})(1+\frac{234491}{s})(1+\frac{s}{169256})}{(1+\frac{s}{367831})(1+\frac{s}{67000}+{\left(\frac{s}{47482}\right)}^2)}---\left(28\right)$

Introducing in transfer function and be inverted zero point, is in order to improve the low frequency characteristic of open-loop transfer function.But can affect the medium-high frequency characteristic of system.The gain cross-over frequency is higher, and system's dynamic response time is shorter, and high frequency poles is used for suppressing high frequency components.

PID control circuit parameter:

The PID compensator of peak electricity flow pattern Buck converter by formula (23) and formula (26), can be tried to achieve the PID compensator circuit parameters R of Buck converter as shown in figure 10 ₁, C ₁, R ₂, C ₂, R ₃:

G _CM=R ₃/(R ₁+R ₂)=4.73

ω _z=1/(R ₂C1)=16838rad/sec，R ₂=13KΩ，C ₁=4.5nF

ω _L=1/(R ₃C ₂)=6283rad/sec，R ₃=66KΩ，C ₂=2.5nF

ω _p=(R ₁+R ₂)/(R ₁R ₂C ₁)=234491rad/sec，R ₁=1KΩ

The Bode diagram of PID control and compensation network transfer function as shown in figure 11, the peak current control pwm circuit that the present invention is based on the Buck type current control circuit thereof using PID algorithm of PID control feeds back, thereby so that led drive circuit has preferably stability, inhibition ability to the disturbance of load disturbance and input voltage is strong, by peak current control PWM, so that the dynamic response of system is fast, and simplify compensating circuit so that gain bandwidth becomes large, and be easy to current-sharing.

In actual applications, intelligent remote wireless Street Lamp Monitor System of the present invention has following function: illumination control function, illumination monitoring function, emergency scheduling function and production management function.The below is specifically described each function:

1, illumination control function

Illumination control function comprises: can automatic or manual control realize turning on light and turning off the light of full night-light, evening lamp, Landscape Lamp and advertising lamp, comprise team control, group control and separately control; The street lamp control program that adopts time control, light-operated, vibrations control, emergent control to combine, when scheduling was out of control, terminal can independent operating, finishes the open and close lamp; As required, terminal can be able to be divided into the difference in functionality group, to realize the variation controls such as team control and group control; Can realize every a lamp ON/OFF lamp, every control strategies such as several lamp ON/OFF lamps, single lamp light modulations; Can realize the monitoring to street lamp, Landscape Lamp, advertising lamp.

2, illumination monitoring function

Specifically comprise: utilize the various kinds of sensors device, timing automatic or manually patrol is surveyed or the parameters such as street lamp voltage, electric current, power, illuminance, temperature, vibrations or on off state are surveyed in choosing; The warning scheme that adopts control terminal initiative alarming and scheduling controlling terminal to report to the police and combine; The various faults of automatic monitoring system are also sent corresponding voice or sound and light alarm; Dispose camera in the street lamp terminal, to gather street lamp image information on every side, by communication port transfer instruction data set view data; Calculate, add up, inquire about each street bright light rate; Monitoring Data and statistics in inquiry, the printing random time.

Each street lamp terminal can be analyzed the fault state of self, and initiatively reports to the police to Surveillance center, namely the street lamp terminal in a single day break down (power failure, mistake bright light, turn off the light etc.) report to the police to Surveillance center immediately; After the server of Surveillance center receives the initiative alarming of street lamp terminal, can show abort situation, fault title at screen immediately, and with information such as voice alert fault title, states, to guarantee timely handling failure.Deposit simultaneously database in, in order to inquiry.

Surveillance center can report to the police by following several modes:

The computer sound and light alarm, prompting the operator on duty note;

Telephone phonic alarm, during the Control Room unattended operation, Surveillance center is connected with pass personnel's phone by GPRS net automatic poking, sends phonetic warning;

Short message of mobile telephone for alarm, during the Control Room unattended operation, Surveillance center sends the warning short message by the gsm wireless mobile telephone network from the trend relevant personnel's mobile phone.

Behind direct-detection or the data analysis to detection, supervisory control system can be found following fault:

Line electrical leakage;

Line broken circuit (circuit damages or steal line to be caused);

Contactor lost efficacy;

Power failure or mains side fuse blow;

Short trouble;

Cross/under voltage;

Cross/undercurrent

The node Communications failure.

3, emergency scheduling function

The emergency scheduling function specifically comprises: turn on light in advance, delay the emergent control function of turning off the light according to illuminance; Have arbitrarily and select, divide into groups or all out of service or control functions of resuming operation; The emergency starting shooting, the floor picture is realized on-site supervision; But the open and close lamp time of packet design advertising lamp, Landscape Lamp.

4, production management function

The production management function specifically comprises:

Department and personal management; Department and personnel's work, responsibility management; System's operation maintenance management; The equipment operation maintenance management.

System is according to scope of offical duty's classification of keeper, operator, other staff, and setting code and operating right prevent the accident that the artificial origin causes respectively, guarantee the system safety reliability service.Simultaneously can deposit user's operation note in database, in order in the future inquiry.System manager with highest weight limit can arrange system's significant data.

By different lamp types, zones of different, different sections of highway, different period, system can arrange control parameter and illuminance value online, also can adjust online each category node operational factor and alarm Protection parameters simultaneously, comprising:

The setting of alarming value: the upper and lower bound value that the warning items such as electric current, voltage are set;

The switch lamp time is revised: change the switch lamp time of system default, to adapt to user's needs;

The basic configuring maintenance of node: be used for changing the configuration of configuration or each node of initialization, such as: the data such as logical signal, branch road distribution, with the consistency of maintenance with node;

The node that adopts full night/evening lamp is carried out entirely/the evening lamp setting;

Line alignment is safeguarded: each branch road of every bit all has block trend separately, this function namely is that each branch road is demarcated its trend at its corresponding node block figure, the fault that system is occurred can be located at node block figure, and being convenient to the maintenance personal has keeping in repair of target.

Normal data is safeguarded: electric current, voltage correct data to each node safeguard, as calculated difference and with alarming value foundation relatively, thereby realize accurately reporting to the police.The corrigendum of these group data can patrolling survey or calling together in the survey and automatically finish, also can manually be inputted.

Patrol the survey cycle: the time interval of patrolling between survey is set.

The user utilizes supervisory control system to inquire about, print, back up and to put in order detection data, alarm data, the user operation records of all devices in the random time section, can according to the storage data, count the forms such as the interior bright light rate curve of random time section, power consumption.

Main query statistic comprises:

Historical data: can inquire about any one day data;

Last secondary data: can inquire about previous data;

Press longitude and latitude, calculate local 1 year switch lamp timetable;

The bright light rate of one day, certain node;

Certain month, the total bright light rate of bright light rate and the whole city of certain node;

The street lamp model of each node;

Full night/evening lamp facilities.

The wireless Street Lamp Monitor System of this intelligent remote monitoring is compared with existing Street Lamp Monitor System, has the advantage of following three aspects::

1, precision

The combination of the short-distance wireless communication technology take ZigBee as representative and the radio mobile communication technology take GPRS as representative can realize the single lamp (bar) in the lighting installation is accurately controlled, and then can realize the fine-grained management to monitoring objective.

2, economized

Economized is mainly reflected in:

2.1, the dimming driving circuit 13 of LED street lamp is integrated in intelligent single lamp terminal node, realizes the unification of control and management;

2.2, adopt wireless monitor among the present invention, directly exempted the expense of laying the control cable;

2.3, realize can greatly improving energy-saving efficiency by single lamp monitoring, avoid energy-saving equipment that electrical network is caused secondary pollution, reduce energy-conservation cost.

2.4, single lamp control will make the manager all-sidedly and accurately operation of control equipment and failure condition, prevent or reduce the loss that various accidents cause.

3, intellectuality

Intellectuality is mainly reflected in:

3.1, at network construction and initial phase, ZigBee-network can self-discovery, self-organizing.

3.2, in the network operation stage, ZigBee-network and GPRS network can from detect, self-regulation, under the cooperation of a series of software and hardwares, can keep the network normal operating conditions, realize fault pre-alarming.

3.3, intelligent single lamp terminal node can be operated under automatic control mode of operation and two kinds of patterns of remote control mode of operation.Intelligent single lamp terminal node can report the remote monitoring server with various states and detection data according to the predefined time cycle (such as integral point).When the single lamp terminal node of intellectuality detected catastrophic failure (as power supply have a power failure, daytime bright light, light-offs in evening, various transducer warnings etc.) when occurring, understand in the active reporting mode fault information reporting to the remote monitoring server.Reserve battery is equipped with in intelligent single lamp terminal node inside, and when supply line had a power failure, terminal node can automatically switch to battery-powered, and sends power supply power failure or fault alarm to Surveillance center.The remote monitoring server was patrolled and examined the single lamp terminal node of intellectuality situation with certain cycle, if intelligent single lamp terminal node is not response for a long time, can be with being labeled as fault suspicion node by the single lamp terminal node of intellectuality, so that administrative department further verifies, repairs.

Intelligent remote wireless Street Lamp Monitor System of the present invention, utilize the work state information of each street lamp of ZigBee-network Real-time Collection, and be connected with remote monitoring server 30 by the GPRS wireless telecommunications, realized long-range intelligent monitoring, be convenient to detect in real time the fault state of street lamp, and by the collection to the street lamp state information, be convenient to optimize the light illumination mode of street lamp, to reach the purpose of energy savings, the intelligence of street lamp and the combination of remote monitoring have really been realized, reliability is high, has a extensive future.

More than be that better enforcement of the present invention is specified, but the invention is not limited to described embodiment, those of ordinary skill in the art make all equivalent variations or replacement also can doing under the prerequisite of spirit of the present invention, the distortion that these are equal to or replace all is included in the application's claim limited range.

Claims (7)

1. an intelligent remote wireless Street Lamp Monitor System is characterized in that, comprising:

At least one street lamp detects and control device, is connected with each street lamp respectively, for detection of the state information of each street lamp and control the light illumination mode of each street lamp according to the control command of remote monitoring server;

At least one wireless telegon, is connected with the wireless sensor network that street lamp on the same public lighting circuit detects and control device forms, the state information that is used for each street lamp detection and control device are detected in real time each street lamp of acquisition sends the remote monitoring server to;

The remote monitoring server with described wireless telegon communication connection, is used for according to the state information of each street lamp the light illumination mode of street lamp being controlled.

2. intelligent remote wireless Street Lamp Monitor System as claimed in claim 1, it is characterized in that: described street lamp detects and control device comprises the ZigBee controller, the input of described ZigBee controller is connected with a light sensor, and output is connected with the dimming driving circuit for the light illumination mode of control street lamp.

3. intelligent remote wireless Street Lamp Monitor System as claimed in claim 1, it is characterized in that: described wireless telegon comprises main controller, GPRS module and ZigBee module, wherein:

The ZigBee module, is connected with the wireless sensor network that street lamp on the same public lighting circuit detects and control device forms, is used for receiving from street lamp and detects and control device detects the state information of the street lamp that obtains and transmits control command from the remote monitoring server to street lamp detection and control device down;

The GPRS module is with the wireless connections of described remote monitoring server;

Main controller is connected with described ZigBee module and GPRS module respectively.

4. intelligent remote wireless Street Lamp Monitor System as claimed in claim 3, it is characterized in that: the input of described ZigBee module also is connected with light sensor, and output is connected with the dimming driving circuit for the light illumination mode of control street lamp.

5. such as claim 2 or 4 described intelligent remote wireless Street Lamp Monitor Systems, it is characterized in that: described dimming driving circuit is the BUCK type current control circuit based on PID control.

6. intelligent remote wireless Street Lamp Monitor System as claimed in claim 1, it is characterized in that: described remote monitoring server also communication link is connected to monitor client.

7. intelligent remote wireless Street Lamp Monitor System as claimed in claim 6 is characterized in that: the mobile radio terminal of described monitor client for being connected with the wireless telecommunications of remote monitoring server.

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