CN2802896Y - Distribution type energy-saving controller for street lamp - Google Patents
Distribution type energy-saving controller for street lamp Download PDFInfo
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- CN2802896Y CN2802896Y CN 200520057047 CN200520057047U CN2802896Y CN 2802896 Y CN2802896 Y CN 2802896Y CN 200520057047 CN200520057047 CN 200520057047 CN 200520057047 U CN200520057047 U CN 200520057047U CN 2802896 Y CN2802896 Y CN 2802896Y
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Abstract
The utility model discloses a distribution type energy-saving controller for a street lamp. The system comprises a host machine, an industrial control computer and an assistant machine. The utility model is characterized in that the host machine uses an SCM (CPU) as a kernel to be matched with a peripheral storage unit, a display terminal, an input terminal, a communication interface, a detection unit of a voltage zero crossing point, a control unit of a voltage phase angle and a current detection unit. The assistant machine is composed of the SCM (CPU) and an AC phase angle detection unit arranged on a cutting opening, a detection unit of electric net voltage and a control relay connected with a communication port. The host machine controls the size of the back phase angle of the voltage zero crossing point of an AC electric source of the assistant machine to generate data signals and sends the data signals to the assistant machine in order to control various work states of the street lamp. The utility model has the obvious effects of small data transmission quantity, long transmission distance, strong interference resistance, low realizing cost, etc.
Description
Technical field:
The utility model relates to the electric lighting technical field, relates to the energy-saving control system of the circuit control system that is used for general electric light source, particularly city street lamp.
Background technology:
China's city street lamp also is to use regular tap control basically, and waste of energy is very serious.In order to change this present situation, the indivedual cities computer network on probation and the communication technology are carried out centralized control monitoring and management to street lamp.Present employed system configuration all is made up of central control room and substation basically, and communication modes is then different, can be divided into following several: 1, wireless private network; 2, wireless and power carrier; 3, carrier wave.Wireless private network is exactly to form a wireless control system by a main frame and some extension sets.The hybrid mode of wireless and power carrier, be to adopt wireless private network (Nuo Te of employing net, GPRS/CDMA etc. are also arranged) between central control room and the substation, adopt the communication modes of power carrier between substation and the lamp controller, the user can finish some control and line traffic control to whole system at central control room.CN 1152608C patent of invention just belongs to this communication modes.Carrier communication is divided into special line and power line carrier again, and CN 1048849C patent of invention is exactly a kind of structural system of power line carrier.Above-mentioned first kind of communication modes can only control to a circuit, can not control to single pole or single lamp, and energy-saving effect is not remarkable; The special line communication is owing to investment is too big, construction bothers especially again and not welcome by industry; Electrification line carrier wave and use wireless and power carrier mixings communication modes remains in following deficiency: 1, owing to the AC power serious interference, cause misoperation easily, poor reliability; 2, both-way communication, system is complicated, invest bigger than normally, and the tool budgetary estimate is invested about 200,000 yuan for every kilometer.
Summary of the invention:
The purpose of this utility model provides a kind of unidirectional street lamp control system, and this system has reduced investment, the advantage that reliability is high.
The utility model realizes that the technical solution of above-mentioned purpose is:
A kind of distributed streetlight energy-saving control device comprises main frame, industrial control computer and slave, it is characterized in that
Main frame is that core is equipped with peripheral memory cell, display terminal, input terminal, communication interface, voltage over zero detecting unit, voltage phase angle control unit and current detecting unit formation with single-chip microcomputer (CPU),
By the voltage over zero detecting unit slave AC supply voltage crossover point signal is sent into single-chip microcomputer, the phase angle of Single-chip Controlling slave AC supply voltage, size according to phase angle behind the AC supply voltage zero crossing produces data-signal, be sent to slave by power line, to realize operation to the synchronous adjustment of control, the principal and subordinate of street lamp operating state, instruction secondary verification and illegal command cancellation
By the Single-chip Controlling current detecting unit slave operating current is detected one by one, judge the street lamp current working state;
Slave is by single-chip microcomputer (CPU) and be located at voltage phase angle detecting unit, the network voltage detection unit on the fracture wherein and the control relay that is connected on the communication port constitutes,
Described voltage phase angle detecting unit detects data that main frame transmits and sends into single-chip microcomputer and decode, and realizes control corresponding according to the control signal that main frame sends,
Described network voltage detection unit is sent detected mains voltage signal into single-chip microcomputer and is handled, and single-chip microcomputer is adjusted the operating state of street lamp by control relay.
An embodiment in the technique scheme is that described voltage phase angle control unit is to establish a trigger to constitute between the communication port of single-chip microcomputer and thyristor trigger electrode, and this trigger is a photoisolator.
Another embodiment in the technique scheme is that described current detecting unit is to connect comparison circuit, level shifting circuit summation current transformer composition on the communication port of single-chip microcomputer successively.
The job step of above-mentioned distributed streetlight energy-saving control device is as follows:
(a) generation of communication data
Set the pairing phase angle of start bit, data bit, check digit and position of rest of complete data-signal earlier, utilize thyristor unsteady flow phase control techniques then, by the output waveform behind the host computer control slave AC supply voltage zero crossing.When output waveform was a complete half-wave, the phase angle was less than " 0 " of set angle as digit order number, greater than " 1 " of set angle as digit order number.Main frame is to the control of ac power waveform, and according to predetermined encoding output, slave is when accepting the host power supply energy, and the voltage waveform that main frame is exported detects, and produces corresponding data according to predetermined coding form in slave.
(b) principal and subordinate adjusts synchronously
Main frame sends the phased waveform of the standard of coming to an agreement in advance, and behind detected this phased waveform of slave, promptly as the markers of slave, slave is to be designated as the standard markers this moment.
(c) instruction secondary verification
Slave connects the secondary verification is carried out in the instruction of being received, is determining to carry out corresponding instruction when errorless.
(d) illegal command
After main frame detects interference, send illegal command, the instruction manipulation that produces is disturbed in the cancellation of control slave.
Because the utility model makes full use of and contains the rich data resource in the AC power, size by phase angle behind the control slave AC supply voltage zero crossing produces data-signal, adopt the one-way transmission data-signal simultaneously, therefore it is little to have volume of transmitted data, long transmission distance, antijamming capability is strong, realizes cost remarkable results such as low (have only prior art 50%).
Description of drawings:
Fig. 1 is an overall topological structure block diagram of the present utility model;
Fig. 2 is the host circuit structured flowchart;
Fig. 3 is a slave circuit structure block diagram;
Fig. 4 is transformer compensation pressure regulation electrical schematic diagram;
Fig. 5 is a phase angle detecting unit electricity theory diagram;
Fig. 6 is phase angle control unit and current detecting unit electricity theory diagram;
Fig. 7 starts flow chart for street lamp;
Fig. 8 is the road lamp energy-saving control flow chart;
Fig. 9 is the anti-Disturbance in Power Net flow chart of system;
Figure 10 is the command checksum flow chart;
Figure 11 is street lighting management and maintenance flow figure.
Embodiment:
As shown in Figure 1, the utility model is made up of main frame 1, industrial control computer 2, slave 3 and management software.System power supply input main frame 1, pass through computer management software, realization is to the management and the control of main frame, when needs illumination control, industrial control computer 2 is given an order, and main frame 1 out-put supply is to each slave 3, because main frame 1 does not send the illumination control command, slave 3 is in off-state, and street lighting does not work.When main frame 1 sends illumination control command (order send through illuminating line), each road slave 3 receives control command, and each slave 3 requires the energized switch according to control command, realizes illumination control.When main frame is given an order, main frame is at first by being located at the zero crossing of the voltage comparator detection mains lighting supply in the host circuit, according to conducting and the shutoff of order request control thyristor SCR10 (referring to Fig. 2), produce control commands corresponding and export then through public lighting circuit; Slave 3 detects mains voltage waveform (employing voltage comparator) when accepting the public lighting circuit power supply, after detecting main frame 1 and giving an order, the order of 3 pairs of detections of slave is decoded, and carries out control corresponding according to order request.
The dead of night, city illumination requires to reduce, and for energy-conservation, industrial control computer 2 sends control command, and through main frame 1 output Energy Saving Control order, each road slave 3 reduces output voltage automatically, reaches energy-conservation purpose.At day, industrial control computer 2 sends closes illumination command, outputs to each slave 3 through main frame 1, and slave 3 is closed street lamp automatically.Whole control process adopts computer management, revises the illumination Control Parameter if desired, only need make an amendment on computers, other controlling units is not done any change.
The mode that slave 3 receives order is divided two kinds of forms: a kind of is the team control form, and a kind of is a control form (point-to-point control).
Team control form: team control order+power supply form+start mode;
Individual control form: individual control order+lamp controller address+start mode;
The team control order mainly is to be used for illumination control, and individual control order is mainly used in the emergency processing of accident and street lighting status checkout (as the street lamp quality) and street lamp and patrols and examines.
Described main frame 1 structured flowchart as shown in Figure 2, microprocessor 9, thyristor 10 and communication interface and the voltage over zero detecting unit of controlling 3 phases formed by single-chip microcomputer (host CPU 4), display unit 5, keyboard unit 6, random asccess memory 7, read-only memory 8, respectively.Host CPU 4 can work alone by breaking away industrial control computer, has promptly embedded a small-sized operating system, finishes the various controls and the management function of street lamp, in order to realize system's online programmable (ISP), selects the Flash single-chip microcomputer for use; For 3 phase systems, for burden and the raising system antijamming capability that alleviates host CPU 4, control with 3 single-chip microcomputers respectively, at this moment 4 of host CPUs are responsible for giving an order, and work such as concrete algorithm, verification are given the single-chip microcomputer of (MPU9) in 3 voltage phase angle control units and finished; ROM8 is used to preserve the address and the state information of street lamp; RAM7 is used for the intermediate object program of the running of save routine; Display unit 5 and keyboard unit 6 can be realized various operations and monitoring function, as give an order etc.; Main frame 1 is measured 3 phase supply voltages and is input to host CPU 4 or is input to single-chip microcomputer among the 3 phase MPU9 respectively, produces certain time of delay (referring to Fig. 6) by photoisolator control power electronic device (thyristor 10); Be provided with current detecting unit in the main frame 1, this unit is the (see figure 6) that connects comparison circuit, level shifting circuit summation current transformer composition on the communication port of single-chip microcomputer successively, the illumination idle the time, one by one each slave 3 power supply is patrolled and examined, judge the working condition of this slave and street lamp that slave is controlled according to the size of electric current; In addition, if main frame 1 is connected with native industry control computer 2, then can utilize more powerful control of computer realization and management function, such as patterned operation interface, more powerful street lamp data management etc., host CPU 4 carries out serial communication by RS-232 mode and industrial computer 2, and this moment is to whole work of alternative display unit 5 of the operation of industrial computer and keyboard unit 6; Except with local industrial computer is communicated by letter, main frame 1 also should be communicated by letter at a distance with the computer in the long-range Master Control Center, at this moment adopts modem to carry out dial-up connection.
The structured flowchart of slave 3 is shown in Fig. 3,4 and 5, by forming from CPU11, voltage phase angle detecting unit 12, network voltage detection unit 13, many taps compensator transformer 14, magnetic latching relay 15.Carry out communication from CPU11 and main frame 1, and finally send control signal control magnetic latching relay 15.Supply power mode adopts transformer compensation voltage regulating mode, and the specific implementation method is: be provided with tap compensator transformer 14 more than in each slave 3 inside, main winding connects supply voltage, and its effective value is U
S, five auxiliary winding are arranged, turn ratio is 1: 2: 4: 8: 16, the output voltage effective value can be used U
m, 2U
m, 4U
m, 8U
m, 16U
mExpression after receiving the order of main control system 1 from CPU11, by decoding, is determined street lamp power supply, road lamp power supply voltage, the closing of contact or the disconnection of sending each magnetic latching relay 15 of signal controlling from CPU11, thus regulate the effective value U of output voltage
O, to street lamp power supply, road lamp power supply, U
OAdjustable range be U
S± 31U
mTransformer compensation voltage regulating mode is compared with the traditional transformer voltage regulating mode, and it is little to have a volume of transformer, and cost is low, power supply voltage level precision height, range of regulation wide (about ± 20%), characteristics such as transformer noload losses is little.
Street lamp voltage detecting among Fig. 3 adopts voltage comparator to realize, AC power directly is connected with the input of voltage rate of exchange device after hindering step-down by crosstalk, in order to prevent that the alternating voltage fluctuation from causing the voltage comparator input voltage too high, at two diodes of input inverse parallel of voltage comparator.
Another effect of the present utility model is to have changed Starting mode.The start mode of street lighting is generally seldom considered, but in the practical application, if consider its start mode, can be reached good effect.Reason has following 2 points:
(1) filament resistance under cold conditions is lower, and generally when starting, its impulse current is big, and for the such lighting apparatus of street lamp, because quantity is many, its corresponding impulse current is big, needs capacity big, causes equipment investment to increase.
(2) the large impact electric current is big to burn-out life influence, if the start mode of the science of employing can prolong useful life of light fixture greatly.
So the Starting mode that adopts is: when street lamp starts, the lower voltage of slave 3 outputs, treat after the filament pre-heating, slowly improve supply power voltage (voltage promotes by certain slope), can reduce the influence of impulse current greatly like this to light fixture, prolong light fixture useful life, whole implementation is automatically performed by slave 3.
Accompanying drawing 5 is a voltage phase angle detecting unit electrical schematic diagram, and its course of work is: voltage comparator directly is connected with AC power to be measured, is used to detect the phased waveform of main frame output AC power source output.When main frame did not send control signal, what output was detected at the phase angle was odd symmetric square wave; When main frame does not send control signal, the phase angle detects the time of delay of phased waveform, this waveform is sent to single-chip microcomputer, single-chip microcomputer is according to determining that main frame sends the logic of signal and is recorded in single-chip microcomputer inside the time of delay of waveform, after treating that main frame sends signal and finishes, single-chip microcomputer is decoded to measured signal, and goes to carry out control corresponding by decoded instruction.
Accompanying drawing 6 is voltage phase angle control unit and current detecting unit electricity theory diagram, wherein three operating states of street lamp host computer control:
(1) forbid operating state: single-chip microcomputer is output as low level, and the photoelectricity isolation is output as low level, and corresponding power electronic device is an off state, and public lighting circuit does not have supply power voltage output;
(2) operating state: single-chip microcomputer is output as high level, and the photoelectricity isolation is output as high level, and corresponding power electronic device is a conducting state, and public lighting circuit has supply power voltage output, normal illumination;
(3) control command output state: single-chip microcomputer output is exported high and low level according to command request, and corresponding power electronic device changes its operating state according to single-chip microcomputer output, and slave detects its signal when accepting main frame out-put supply power;
Current detecting unit in the accompanying drawing 6 is mainly used in road lamp management and overcurrent protection, and wherein road lamp management adopts point-to-point communication mode, is specially:
Road lamp management: after main frame 1 is controlled at the end of control command output state, slave 3 will change street lamp operating state (street lamp conducting, shutoff) by main frame 1 command request, this will cause the variation of the electric current in the street lamp power supply, road lamp power supply circuit, the electric current that changes becomes direct current signal through level conversion, this direct current signal produces a voltage jump through voltage ratio, the signal of saltus step is admitted to single-chip microcomputer, and single-chip microcomputer can be known the operating state of street lamp by detecting the variation of electric current; If street lamp is because of certain reason, cisco unity malfunction, after main frame sent instruction, the street lamp electric current did not change, and judged that then this street lamp breaks down, and single-chip microcomputer will write down the address code of this slave.
Overcurrent protection: during the street lamp operate as normal, the street lamp operating current is in its protection range; When street lamp for a certain reason; after overcurrent occurring; the street lamp current detecting unit detects this over-current signal, and (the over-current signal testing process is identical with the road lamp management process; the numerical value difference of adjusting just); this signal is admitted to single-chip microcomputer; single-chip microcomputer will enter forbids operating state, causes the damage of power electronic device, circuit and light fixture to prevent overcurrent, reaches the purpose of protection control system.
Accompanying drawing 7 is street lamp start-up control flow charts.Before the work, whole system is power supply (supply power mode can be a three-phase or single-phase) not, and during work, main frame 1 is connected the street lamp illumination system power supply, but street lamp and not working, because street lamp is controlled illumination by slave 3.Treat the stable back of system power supply (main frame 1 time-delay about 1 minute), main frame 1 sends the street lamp enabled instruction by power line to slave 3, and slave 3 is after receiving instruction, according to the command request segmentation, light street lamp in the mode of soft start.Adopting in such a way, mainly is to prevent that slave 3 internal compensation transformers 14 from starting surge current and street lamp startup surge current impacts to system together.Slave 3 is transferred to 189V with street lamp power supply, road lamp power supply voltage earlier with soft starting mode, after after a while to filament pre-heating, again street lighting voltage is raised to 220V by a slope from 189V, and system start-up finishes.
Accompanying drawing 8 is road lamp energy-saving control flow charts.Street lighting control divides multiple mode, they are: illumination in red-letter day, normal illumination, lighting dimming, low-level lighting and emergency lighting, wherein red-letter day, illumination was meant in the festive occasion, set off the atmosphere in red-letter day by increasing city illumination brightness, method is that lighting in some is set on lighting in red-letter day, at ordinary times, these light fixtures are not worked at ordinary times.In the festive occasion, main frame 1 sends the illumination command in red-letter day, and slave 3 starts the lighting in red-letter day after receiving order; Normal illumination is meant in the street lamp startup and finishes, the illumination condition of correspondence when lighting voltage is upgraded to 220V, and it is the groundwork state of street lighting; Lighting dimming is meant after the relative minimizing with the stream of people of the magnitude of traffic flow, the pairing state of street lighting, and this moment, the light fixture supply power voltage sent instruction by the user by main frame 1, and slave 3 reduces voltage after receiving instruction, and its voltage generally is lower than 220V and is higher than 189V; After the relative rareness of the low-level lighting magnitude of traffic flow with the stream of people, a kind of energy-conservation means that are provided with in order to guarantee city illumination, during work, main frame 1 sends the low-level lighting instruction, and slave 3 drops to voltage 189V automatically after receiving instruction; Emergency lighting is meant at the scene that accident occurs, if system just is in the low-level lighting state, can pass through some means (as field control switch or Advise By Wire), changes the illumination of the scene of the accident.All lighting systems are not unique, and it is controlled by the instruction that main frame 1 sends, and slave 3 is after the instruction that receives main frame 1, according to command request control street lighting mode.
Above indication voltage is at a certain light fixture, and its corresponding operating voltage of different light fixtures is different, specifically with reference to table 1
Table 1: the desirable energy-saving voltage and the power saving rate of various light fixtures
| Light source type | Energy conservation voltage | The normal voltage power saving rate | Overvoltage 10% power saving rate |
| Low-pressure sodium lamp | 180V | 33％ | 48％ |
| High-pressure sodium lamp | 190V | 28％ | 47％ |
| High-pressure mercury lamp | 190V | 28％ | 47％ |
| Metal halid lamp | 180V | 33％ | 48％ |
| Fluorescent lamp | 190V | 28％ | 47％ |
| The mixed type light source | 190V | 28％ | 47％ |
In addition, this control system can also realize " given " illumination lighting system, so-called given illumination illumination, be actually that given street lighting voltage realizes, the realization of this process does not need to revise the program of slave 3 as long as make amendment to main frame 1 or to the computer program of main frame 1 realization control.
Accompanying drawing 9 is the anti-Disturbance in Power Net flow chart of system.After main frame 1 detects interference, send illegal command, slave 3 is after receiving illegal command, and the dummy order operation that produces is disturbed in cancellation.
Accompanying drawing 10 is the command checksum flow chart.Slave 3 need send instruction to main frame 1 and carry out the secondary verification, is determining to carry out corresponding instruction when errorless.
Accompanying drawing 11 is street lighting management and maintenance flow figure.The street lighting management is an important component part of modern street lighting with maintenance, it is meant by some technological means, grasp the equipment operation condition at street lamp scene, as bulb damaged condition etc., because the novel electric power line mechanics of communication that system adopts is the one-way communication mode, therefore need to adopt some technological means, the slave 3 of native system adopts single-chip microcomputer 11 controls, and they have the corresponding address sign indicating number, when illumination is idle, light corresponding light fixture by address code, corresponding electric current will change, and when the variation that collects electric current, illustrate that the street lighting situation is good, otherwise, illustrate that 2 kinds of situations appear in road lamp:
(1) controller (slave 3) does not receive order,
(2) street lamp bulb damages.
System can say the word again for situation (1), detects electric current again and changes.Need more change the bulb for situation (2), when street lamp keeps in repair, often see that daytime, street lamp was lighted, this mainly is a situation of checking the street lamp maintenance, adopt this system, known street lamp damaged condition only need be checked corresponding light fixture during maintenance when street lighting is managed, and does not need to light all street lamps, after maintenance, detect repair status, can be by being arranged on on-the-spot emergency lighting emergency switch, just can the maintenance and inspection situation.
Technique scheme has following advantage than prior art:
(1) adopt novel street lamp control technology, realize the street lighting Energy Saving Control, reach energy-conservation more than 30%, when power network fluctuation 10%, can be energy-conservation more than 50%;
(2) adopt distributed control technology, both can overcome the phenomenon that line drop causes light fixture supply power voltage inequality, can reduce system's installation cost and project cost widely again, system installs simple, is specially adapted to mounted street lamp device transformation.This is the function that other patented technology does not possess;
(3) size at phase angle produces data-signal and is sent to slave behind the control slave AC supply voltage zero crossing, and the real-time of its long distance of signal transmission, system is good, strong interference immunity.Although it is a kind of one-way communication technology,, can realize management to street lighting by adopting excitation one response mode; With respect to adopting power line carrier, PLC street lighting technology, it is good that it has real-time, and power line carrier, PLC is owing to limited by power supply quality, and its real-time is poor;
(4) voltage control adopts the transformer compensation technique, both can guarantee the consistency of every street lamp power supply, road lamp power supply voltage, can reduce transformer capacity and no-load loss widely again; And other street lamp control appliance generally adopts transformer centrally connected power supply (influenced by system cost), owing to be subjected to the influence of line drop, can not really guarantee the consistency of street lamp power supply, road lamp power supply voltage.And other patented technology does not adopt this function;
(5) soft-start mode is adopted in the street lamp starting, can reduce the impact of starting surge current to light fixture, power supply unit and circuit greatly, improves the useful life (conservatively estimating to improve 3 ~ 4 times of useful lifes) of light fixture and circuit, reduces the capacity of equipment.And other patented technology does not adopt this function;
(6) directly adopt supply line to realize control, the quantities in engineering construction and the transformation process is reduced greatly, and can save a large amount of control wire rod and nonferrous materials;
(7) system has introduced the Holiday lamp photocontrol, can change the illumination of street lighting under the prerequisite that not increase equipment drops into;
(8) system is provided with the street lighting management function, can reduce street lamp maintenance workload and maintenance cost widely;
(9) system is provided with the emergency episode treatment button, when street lamp is under the low-level lighting state, can realize emergency lighting by being arranged on on-the-spot urgent knob.In addition, the emergency lighting knob can also be done the maintenance detection.
Claims (4)
1, a kind of distributed streetlight energy-saving control device comprises main frame, industrial control computer and slave, it is characterized in that
Main frame is that core is equipped with peripheral memory cell, display terminal, input terminal, communication interface, voltage over zero detecting unit, voltage phase angle control unit and current detecting unit formation with single-chip microcomputer (CPU),
By the voltage over zero detecting unit slave AC supply voltage crossover point signal is sent into single-chip microcomputer, the phase angle of Single-chip Controlling slave AC supply voltage, size according to phase angle behind the AC supply voltage zero crossing produces data-signal, be sent to slave by power line, to realize operation to the synchronous adjustment of control, the principal and subordinate of street lamp operating state, instruction secondary verification and illegal command cancellation
By the Single-chip Controlling current detecting unit slave operating current is detected one by one, judge the street lamp current working state;
Slave is by single-chip microcomputer (CPU) and be located at voltage phase angle detecting unit, the network voltage detection unit on the fracture wherein and the control relay that is connected on the communication port constitutes,
Described voltage phase angle detecting unit detects data that main frame transmits and sends into single-chip microcomputer and decode, and realizes control corresponding according to the control signal that main frame sends,
Described network voltage detection unit is sent detected mains voltage signal into single-chip microcomputer and is handled, and single-chip microcomputer is adjusted the operating state of street lamp by control relay.
2, a kind of distributed streetlight energy-saving control device according to claim 1 is characterized in that described voltage phase angle control unit is to establish a trigger to constitute between the communication port of single-chip microcomputer and thyristor trigger electrode.
3, a kind of distributed streetlight energy-saving control device according to claim 1 and 2 is characterized in that described current detecting unit is to connect comparison circuit, level shifting circuit summation current transformer composition on the communication port of single-chip microcomputer successively.
4, a kind of distributed streetlight energy-saving control device according to claim 3 is characterized in that described trigger is a photoisolator.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200520057047 CN2802896Y (en) | 2005-04-19 | 2005-04-19 | Distribution type energy-saving controller for street lamp |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200520057047 CN2802896Y (en) | 2005-04-19 | 2005-04-19 | Distribution type energy-saving controller for street lamp |
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| CN2802896Y true CN2802896Y (en) | 2006-08-02 |
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| CN 200520057047 Expired - Lifetime CN2802896Y (en) | 2005-04-19 | 2005-04-19 | Distribution type energy-saving controller for street lamp |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103425154A (en) * | 2012-05-23 | 2013-12-04 | 德克萨斯仪器股份有限公司 | Digital phase angle detection and processing |
| CN111405722A (en) * | 2018-12-17 | 2020-07-10 | 西门子瑞士有限公司 | Light modulator |
-
2005
- 2005-04-19 CN CN 200520057047 patent/CN2802896Y/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103425154A (en) * | 2012-05-23 | 2013-12-04 | 德克萨斯仪器股份有限公司 | Digital phase angle detection and processing |
| CN111405722A (en) * | 2018-12-17 | 2020-07-10 | 西门子瑞士有限公司 | Light modulator |
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|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Effective date of abandoning: 20090805 |
|
| C25 | Abandonment of patent right or utility model to avoid double patenting |