CN101669154B - Induced voltage suppressor for use in a traffic signal controller - Google Patents
Induced voltage suppressor for use in a traffic signal controller Download PDFInfo
- Publication number
- CN101669154B CN101669154B CN2008800053228A CN200880005322A CN101669154B CN 101669154 B CN101669154 B CN 101669154B CN 2008800053228 A CN2008800053228 A CN 2008800053228A CN 200880005322 A CN200880005322 A CN 200880005322A CN 101669154 B CN101669154 B CN 101669154B
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- China
- Prior art keywords
- induced voltage
- resistor
- traffic lights
- load
- suppression device
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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- G—PHYSICS
- G08—SIGNALLING
- G08G—TRAFFIC CONTROL SYSTEMS
- G08G1/00—Traffic control systems for road vehicles
- G08G1/07—Controlling traffic signals
Abstract
An induced voltage suppression device for use in a traffic signal controller is located along a lamp drive circuit (24) of a traffic light. The device includes a low impedance element (16) and an independently controllable switching element (12) able to disconnect the low impedance element from the circuit at any time.
Description
Technical field
The present invention relates to a kind of induced voltage suppressor that is used for traffic signal control.Particularly; The present invention relates to a kind of following equipment and method: it is used to switch the output of traffic signal control, to prevent to lead near the voltage that voltage on the electric wire of controller be the operated LED traffic lights of the controller supply lines of supplying power undesirably influencing.
Background technology
In the field of electronics road traffic control system, supply power to the voltage on the electric wire of traffic lights through measurement and can judge whether light yellow is useful to traffic lights.Unfortunately, when all bulbs or light fixture during all by the line powered of open circuit, voltage measurements display lamp clearly is powered.Because near the influence of the electric wire voltage on the open circuit electric wire receives is so this situation can occur.Undesirable voltage can not influence the work of lamp usually on the supply lines, but possibly influence other device, the especially supervising device that is connected with electric wire.This voltage before reduced through load capacitor is connected to the neutral line from supply lines.Load capacitor forms the capacitive divider with wire capacitance, and therefore can make undesirable voltage reduce the ratio of these electric capacity.The defective of the method is that some traffic control systems are used the lamp that connects through transformer.Unfriendly, transformer inductance possibly produce resonance with the electric capacity of electric wire and load capacitor, thereby makes the advantageous effects of load capacitor invalid.To this conspicuous solution is to replace load capacitor with resistor.Yet the very big defective of this method is that resistor will undesirably become hotter in normal use, because as long as the lamp light yellow, resistor just has the whole supply voltages that apply on it.
Summary of the invention
An object of the present invention is; Through providing following lamp drive circuit to overcome or solve at least basically the problems referred to above of prior art: this lamp drive circuit all shows Low ESR switching on and off under the state, thereby allows to improve the measurement of the voltage on the electric wire of opposing traffic lamp power supply.
According to an aspect of the present invention; A kind of induced voltage suppression device that is used for traffic signal control and is provided with along the lamp drive circuit of traffic lights is provided; This device comprises low impedance element and the on-off element that can independently control, and this on-off element can at any time make low impedance element and circuit break off.
Preferably, the resistance that low impedance element has depends on impressed voltage, thereby for the impressed voltage in any normal range of operation that is in lamp drive circuit, the power of low impedance element consumption all is no more than predeterminated level.
Preferably, low impedance element is following resistor: its resistance positive temperature coefficient that has is enough to allow whole voltages of lamp drive circuit to be applied on the resistor, and can not cause the permanent damage of resistor.
In a preferred form, on-off element is controlled so as to when turning off traffic lights and connects.
Preferably, on-off element is controlled so as to when the measuring voltage on the traffic lights surpasses predeterminated level and breaks off.
Preferably, induced voltage suppressor is connected to the device that is used to measure power, curtage, and wherein, whether this measurement is connected and under the situation that on-off element breaks off, carried out at on-off element, thereby allow the check measurement device to work.
Alternately; Induced voltage suppressor preferably is connected to the device that is used to measure power, curtage; Wherein, this measurement is connected and under the situation that on-off element breaks off, is carried out at on-off element, thereby allows through recognizing that following situation estimates the impedance of load: in the measurement power of load, curtage; High impedance load receives the switching manipulation influence significantly, and low-impedance load only slightly receives the switching manipulation influence.
According to a further aspect in the invention; A kind of induced voltage suppressor that is used for traffic signal control is provided; This induced voltage suppressor is along the lamp drive circuit setting, and comprises that traffic lights load switch, loading resistor and low power switch, loading resistor have and be used to reduce the Low ESR along the induced voltage of driving circuit; Low power switch is used for allowing when the traffic lights load switch is in open position, and loading resistor and lamp drive circuit break off.
Preferably, the traffic lights load switch is a TRIAC.
Preferably, loading resistor has enough resistance positive temperature coefficients, thereby if owing to slip up whole supply voltages are applied on the loading resistor, the natural heating of loading resistor will make its resistance increase, thereby limit further heating.
Description of drawings
In order can easily to understand the present invention and to try out, referring now to following description to first preferred implementation of the present invention, and will be with reference to following Fig. 1, Fig. 1 is the structural drawing of second preferred implementation of the present invention.
Embodiment
What in traffic signal control, work is induced voltage suppressor, and it is along the lamp drive circuit setting.Induced voltage suppressor comprises: conventional traffic lights load switch typically is a TRIAC; Loading resistor, its impedance is enough low, and is low-level so that induced voltage is decreased to; And other low power switch, to allow when main traffic lights load switch is worked loading resistor and circuit disconnection.In this embodiment; Loading resistor has higher resistance positive temperature coefficient, thereby, if because some line faults or control error and whole supply voltages are applied on the loading resistor; The natural heating of loading resistor will make its resistance increase, thereby limit further heating.This resistor normally can be buied, and is called as the PTC electroregulator.
When load switch is in off-state, perhaps when the traffic controller microprocessor instructs is done like this, loading resistor with can take place automatically being connected all of output of traffic lights load switch.Loading resistor has following other characteristic: intrinsic current receives the resistance positive temperature coefficient restriction of some or all load cells.
This first embodiment of the present invention also has voltage measure capability, and thus, the voltage of sensing lead resistor in circuit and not in circuit the time can allow the impedance of load is estimated.In addition, power measurement is another ability of this embodiment of the present invention.Bearing power through the sensing lead resistor in circuit and not in circuit the time can be confirmed the true(-)running and the calibration of load switch power measurement ability.
Fig. 1 shows second embodiment of the present invention.In this example, microcomputer 10 is connected with controllable switch element 12 through coupling arrangement 14, thereby allows PTC electroregulator 16 that electric current is conducted to common-battery source neutral conductor 20 from TRIAC 18.Have optional resistor 22, though it is for the present invention not necessarily,, it is through being commonly used to that the maximum current limit is set when on-off element 12 is connected.
Electric power is supplied to circuit 24, and connects 25 from the output of circuit 24 to traffic lights (not shown).It has fuse 26, though for the present invention not necessarily, possibly be useful.
In a preferred form, PTC electroregulator 16 can be the 2322-660-51993 part by BC parts manufactured.When being in cold conditions (cold), this electroregulator has the resistance in about 1200 Europe, and when being applied in whole supply voltage, it will become warm to about 140 ℃ temperature.Can select resistance is the resistor 22 in about 1200 Europe.When with the cold-state resistance (cold resistance) of electroregulator 16 when combining, can be set to the appropriate value of about 100mA through the maximum cold conditions electric current (cold current) of resistor 22, electroregulator 16 and on-off element 12.On-off element 12 can be the TRIAC actuator type TLP3052 that is made by Toshiba expediently.TRIAC 18 can be the MAC16M type of being made by ON semiconductor company.
For a person skilled in the art, it is obvious that, under the prerequisite that does not deviate from scope of the present invention or field, can carry out various detailed modifications to the design and the structure of above-mentioned induced voltage suppressor.
Claims (8)
1. induced voltage suppression device that is used for traffic signal control and is provided with along the lamp drive circuit of traffic lights; Said induced voltage suppression device comprises low impedance element and the on-off element that can independently control; Said on-off element can at any time make said low impedance element and said circuit break off; Wherein, the resistance that said low impedance element has depends on impressed voltage, thereby; For the impressed voltage in any normal range of operation that is in said lamp drive circuit, the power of said low impedance element consumption all is no more than predeterminated level.
2. induced voltage suppression device according to claim 1; Wherein, Said low impedance element is following resistor: its resistance positive temperature coefficient that has is enough to allow whole voltages of said lamp drive circuit to be applied on the said resistor, and can not cause the permanent damage of said resistor.
3. induced voltage suppression device according to claim 1, wherein, said on-off element is controlled so as to when turning off said traffic lights to be connected.
4. induced voltage suppression device according to claim 1, wherein, said on-off element is controlled so as to when the measuring voltage on the said traffic lights surpasses predeterminated level and breaks off.
5. induced voltage suppression device according to claim 1; Be connected to the device that is used to measure power, curtage; Wherein, measure at said on-off element and connect and under the situation that said on-off element breaks off, carry out, thereby allow the said measurement mechanism of inspection whether to work.
6. induced voltage suppression device according to claim 1; Be connected to the device that is used to measure power, curtage; Wherein, this measurement is connected and under the situation that said on-off element breaks off, is carried out at said on-off element, thereby allows through recognizing that following situation estimates the impedance of load: in measurement power, voltage or the electric current of said load; High impedance load receives the switching manipulation influence significantly, and low-impedance load only slightly receives the switching manipulation influence.
7. induced voltage suppressor that is used for traffic signal control; Said induced voltage suppressor is along the lamp drive circuit setting, and comprises that traffic lights load switch, loading resistor and low power switch, said loading resistor have and be used to reduce the Low ESR along the induced voltage of said driving circuit; Said low power switch is used for allowing when said traffic lights load switch is in open position; Said loading resistor and said lamp drive circuit break off, and wherein, said loading resistor has enough resistance positive temperature coefficients; Thereby; If owing to slip up whole supply voltages are applied on the said loading resistor, the natural heating of said loading resistor will make its resistance increase, thereby limit further heating.
8. induced voltage suppressor according to claim 7, wherein, said traffic lights load switch is a TRIAC.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| AU2007900871 | 2007-02-16 | ||
| AU2007900871A AU2007900871A0 (en) | 2007-02-16 | Induced voltage suppressor for use in a traffic signal controller | |
| PCT/AU2008/000197 WO2008098303A1 (en) | 2007-02-16 | 2008-02-18 | Induced voltage suppressor for use in a traffic signal controller |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101669154A CN101669154A (en) | 2010-03-10 |
| CN101669154B true CN101669154B (en) | 2012-07-18 |
Family
ID=39689555
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2008800053228A Active CN101669154B (en) | 2007-02-16 | 2008-02-18 | Induced voltage suppressor for use in a traffic signal controller |
Country Status (5)
| Country | Link |
|---|---|
| CN (1) | CN101669154B (en) |
| AU (1) | AU2008215174B2 (en) |
| HK (1) | HK1141891A1 (en) |
| NZ (1) | NZ579581A (en) |
| WO (1) | WO2008098303A1 (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102230956A (en) * | 2011-06-21 | 2011-11-02 | 天津市顺通电子有限公司 | Real-time turning-on and turning-off detection method for power frequency commercial lamp set |
| CN103457224B (en) * | 2013-09-06 | 2016-01-20 | 国家电网公司 | A kind of transmission line induced voltage suppression device based on impedance adjustment |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE1566922A1 (en) * | 1967-01-24 | 1970-10-01 | Huber Signalbau Muenchen | Circuit and device arrangement for monitoring the red lamps and red lamp switching and electrical circuits, preferably in road traffic signal systems |
| US4698721A (en) * | 1983-11-07 | 1987-10-06 | Puroflow Corp. | Power line filter for transient and continuous noise suppression |
| US6072406A (en) * | 1997-07-30 | 2000-06-06 | Leonard; William H. | Traffic light control apparatus for emergency vehicles |
| CN1692543A (en) * | 2002-08-14 | 2005-11-02 | 格哈德·库尔茨 | Device for controlling power by phase control, and method for reducing harmonic waves |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US8292185B2 (en) * | 2005-09-30 | 2012-10-23 | Stmicroelectronics Asia Pacific Pte., Ltd. | Circuits for preventing overvoltage conditions on antenna terminals and method |
| JP4857969B2 (en) * | 2006-07-12 | 2012-01-18 | 株式会社明電舎 | LED display control circuit |
-
2008
- 2008-02-18 WO PCT/AU2008/000197 patent/WO2008098303A1/en active Application Filing
- 2008-02-18 NZ NZ579581A patent/NZ579581A/en unknown
- 2008-02-18 AU AU2008215174A patent/AU2008215174B2/en active Active
- 2008-02-18 CN CN2008800053228A patent/CN101669154B/en active Active
-
2010
- 2010-08-31 HK HK10108244.5A patent/HK1141891A1/en unknown
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE1566922A1 (en) * | 1967-01-24 | 1970-10-01 | Huber Signalbau Muenchen | Circuit and device arrangement for monitoring the red lamps and red lamp switching and electrical circuits, preferably in road traffic signal systems |
| US4698721A (en) * | 1983-11-07 | 1987-10-06 | Puroflow Corp. | Power line filter for transient and continuous noise suppression |
| US6072406A (en) * | 1997-07-30 | 2000-06-06 | Leonard; William H. | Traffic light control apparatus for emergency vehicles |
| CN1692543A (en) * | 2002-08-14 | 2005-11-02 | 格哈德·库尔茨 | Device for controlling power by phase control, and method for reducing harmonic waves |
Also Published As
| Publication number | Publication date |
|---|---|
| CN101669154A (en) | 2010-03-10 |
| AU2008215174A1 (en) | 2008-08-21 |
| AU2008215174B2 (en) | 2012-02-02 |
| NZ579581A (en) | 2011-05-27 |
| WO2008098303A1 (en) | 2008-08-21 |
| HK1141891A1 (en) | 2010-11-19 |
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