CN107517516B - Radar induction LED driven double-brightness control system - Google Patents
Radar induction LED driven double-brightness control system Download PDFInfo
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- CN107517516B CN107517516B CN201710694544.6A CN201710694544A CN107517516B CN 107517516 B CN107517516 B CN 107517516B CN 201710694544 A CN201710694544 A CN 201710694544A CN 107517516 B CN107517516 B CN 107517516B
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- 230000006698 induction Effects 0.000 title claims abstract description 12
- 238000001914 filtration Methods 0.000 claims abstract description 31
- 230000000087 stabilizing effect Effects 0.000 claims description 9
- 230000010354 integration Effects 0.000 claims description 3
- 238000000034 method Methods 0.000 claims description 3
- 230000010355 oscillation Effects 0.000 claims description 3
- 238000004519 manufacturing process Methods 0.000 abstract description 4
- 238000007792 addition Methods 0.000 description 2
- 238000001514 detection method Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000009977 dual effect Effects 0.000 description 2
- 238000002955 isolation Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 230000002452 interceptive effect Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 239000003381 stabilizer Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
Classifications
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- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
- H05B45/00—Circuit arrangements for operating light-emitting diodes [LED]
- H05B45/10—Controlling the intensity of the light
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B20/00—Energy efficient lighting technologies, e.g. halogen lamps or gas discharge lamps
- Y02B20/40—Control techniques providing energy savings, e.g. smart controller or presence detection
Abstract
The invention relates to a radar induction LED driven double-lighting control system which comprises an AC input module, an EMI module, a rectifying and filtering module, an IC integrated control module, a current-limiting resistor R, MOS pipe, an inductance module, a rectifying and filtering module, an LED load module, a radar control module, a module A and a module B. The control system can meet the actual requirements of design schemes in places with high power, such as street lamp tunnel lamp parking lots, and the like, and equipment cannot be damaged; the LED driving circuit can independently control two different power brightnesses of the LED, so that the LED driving circuit can reliably realize two-gear different brightnesses in any power range, and the LED driving circuit is free from the trouble of the difference between the two power brightnesses, so that the integrated design of the product is more convenient and reliable to use and the manufacturing cost is lower.
Description
Technical Field
The invention belongs to the technical field of LED light control, and particularly relates to a radar-sensing LED-driven double-lighting control system.
Background
It is known that LED radar sensing driving power supplies are used to control different power brightness. When the radar detects people and vehicles in the detection range, the LED is high in brightness, and when the detected object leaves the detection range, the LED is in a low-brightness state, so that energy can be saved, the LED can be adjusted to be low-brightness and proper small in visibility, and the normal use of monitoring equipment is facilitated. This is easy to achieve on products within 20W of low power, and more difficult to achieve at higher powers. This is because the difference in low power highlighting and low lighting current power is too large, typically around 100% -15%. A drive of 20W or less is possible. However, if the required product power is large, the difference between the two output luminance powers of the drive is also large, e.g. 1.5% for a 200W highlight and 1.5% for a 3W highlight, so large a difference from 100% to 1.5% makes the LED not operate properly. Reducing the power gap in turn causes the low bright power to be too high, resulting in unnecessary waste. If the dual power supply and dual load are adopted, the installation is complicated, the manufacturing cost is also reached, and the use is inconvenient. For this purpose, the existing practical problems must be solved.
Disclosure of Invention
In order to solve the technical problems, the invention provides a radar-induced LED-driven double-lighting control system, which can meet the actual requirements of design schemes in places with high power, such as street lamp tunnel lamp parking lots, and the like, and cannot damage equipment; the LED driving circuit can independently control two different power brightnesses of the LED, so that the LED driving circuit can reliably realize two-gear different brightnesses in any power range, and the LED driving circuit is free from the trouble of the difference between the two power brightnesses, so that the integrated design of the product is more convenient and reliable to use and the manufacturing cost is lower.
The invention is realized by the following technical scheme, and provides a radar induction LED driven double-lighting control system, which comprises a main circuit, wherein the main circuit is an AC input module, an EMI module, a rectifying and filtering module, an IC integrated control module, a current-limiting resistor R, MOS pipe, an inductance module, a rectifying and filtering module and an LED load module which are electrically connected in sequence; the integrated circuit comprises an Integrated Circuit (IC) integrated control module, a control MOS tube Q, a constant current adjusting resistor RS and a radar control module, wherein the IC integrated control module comprises an IC integrated controller, a power supply voltage VCC, a control MOS tube Q and a constant current adjusting resistor RS, and the power supply voltage VCC is taken from an inductance module; the IC integrated controller is respectively and electrically connected with the current limiting resistor R and the constant current adjusting resistor RS, the input of the control MOS tube Q is electrically connected with the power supply voltage VCC, and the output of the control MOS tube Q is electrically connected with the IC integrated controller; the radar control module is grounded with the main circuit, and the output end is electrically connected with the control end of the control MOS tube Q to control the IC integrated control module.
Preferably, the circuit comprises a module A, wherein the module A comprises a chip IC2, an inductance coil L, a diode D, a power supply resistor R1 and a constant current resistor RA; the power supply end of the module A is electrically connected with a power supply of the rectifying and filtering module, the input end of the module A is electrically connected with the primary end of the inductance coil L, and the output end of the module A is electrically connected with the LED load module; the power output end of the rectifying and filtering module is connected to the chip IC2 through the power supply resistor R1, one output pin of the chip IC2 is connected with the resistor RA to the ground to regulate low-brightness output current, the input pin of the chip IC2 is connected with one primary end of the inductance coil L, the other primary end of the inductance coil L is connected with the power supply of the rectifying and filtering module to complete oscillation work, and the secondary stage of the inductance coil L is connected to the LED load module through the output of the diode D.
Preferably, the device further comprises a module B, wherein the module B comprises a power supply resistor RB, a triode Q1, a triode Q2, a diode DA, a reference voltage stabilizer DZ and a resistor RC; the input end of the module B is electrically connected with a power supply of the rectifying and filtering module, and the output end of the module B is electrically connected with the LED load module; the power output end of the rectifying and filtering module is connected with the base electrode of the triode Q1 through the power supply resistor RB and is simultaneously connected with the voltage stabilizing reference voltage stabilizing tube DZ to the ground to establish reference voltage, the collector electrode of the triode Q1 is amplified and output to the power triode Q2 to conduct the power triode Q2, the power output end of the rectifying and filtering module is connected with the LED load module through the triode Q2 and the diode DA in a constant current manner, and then the LED load module flows into the ground through the constant current resistor RC.
Preferably, the module a or B circuit and the main circuit are designed on the same circuit board to complete integration.
The main circuit of the radar induction control and the added module A or B circuits respectively complete independent control work, so that any two-gear brightness is not affected.
The beneficial effects of the invention are as follows:
1) The radar sensing LED driven double-lighting control system can meet the actual requirements of design schemes of places with high power, such as street lamp tunnel lamp parking lots, and the like, and cannot damage equipment.
2) The radar sensing LED driving double-brightness control system can independently control two different power brightnesses of the LEDs, so that the LED driving can reliably realize double-grade different brightnesses in any power range, and the radar sensing LED driving double-brightness control system is free from the trouble of the difference between the two power brightnesses, so that the design and the use of products are more convenient and reliable, and the manufacturing cost is lower.
Drawings
In order to more clearly illustrate the embodiments of the invention or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described, it being obvious that the drawings in the following description are only some embodiments of the invention, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a schematic diagram of the operation of the prior art;
fig. 2 is a schematic diagram of the operation of embodiment 1 of the present invention.
Detailed Description
The present invention will be described in further detail with reference to the following examples in order to make the objects, technical solutions and advantages of the present invention more apparent. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the invention.
The principles of the invention will be further described with reference to the drawings and specific examples.
In the prior art, as shown in fig. 1, the scheme popular in the current market adopts more than 20W of products with two different powers, the larger brightness is controlled by radar induction, and the smaller brightness is not controlled by radar induction to realize double brightness. Another integrated isolation or non-isolation scheme is generally adopted in the place requiring low power, and a radar induction LED driven double-lighting control system comprises a main circuit and a radar control module 10, wherein the main circuit comprises an AC input module 1, an EMI module 2, a rectification filter module 3, an IC integrated control module 4, a current limiting resistor R5, a MOS tube 6, an inductance module 7, a rectification filter module 8 and an LED load module 9; the AC input module 1 is electrically connected with the EMI module 2, the EMI module 2 is electrically connected with the rectification filter module 3, the rectification filter module 3 is electrically connected with the IC integrated control module 4, the IC integrated control module 4 is electrically connected with the current limiting resistor R5, the current limiting resistor R5 is electrically connected with the MOS tube 6, the MOS tube 6 is electrically connected with the inductance module 7, the inductance module 7 is electrically connected with the rectification filter module 8, the rectification filter module 8 is electrically connected with the LED load module 9, the IC integrated control module 4 comprises an IC integrated controller, a power supply voltage VCC, a control MOS tube Q and a constant current adjusting resistor RS, and the power supply voltage VCC is obtained from the inductance module 7; the IC integrated controller is respectively and electrically connected with the current limiting resistor R and the constant current adjusting resistor RS, the input of the control MOS tube Q is electrically connected with the constant current adjusting resistor RS, and the output of the control MOS tube Q is electrically connected with the IC integrated controller; the radar control module 10 is grounded with the main circuit, and the output end is electrically connected with the control end of the control MOS tube Q to control the IC integrated control module 4.
The working principle is shown in figure 1.
The commercial power flows into the rectifying and filtering module 3 from the AC input module 1 through the EMI module 2, flows into the IC integrated control module 4 from the rectifying and filtering module 3, flows into the current limiting resistor R5 from the IC integrated control module 4, flows into the MOS tube 6 from the current limiting resistor R5, flows into the inductance module 7 from the MOS tube 6, flows into the rectifying and filtering module 8 from the inductance module 7, and then drives the LED load module 9; the radar control module 10 is input after the signal is taken after the output of the inductance module 7, the positive signal is output inside the radar control module 10 to control the conduction of the MOS transistor Q in the IC integrated control module 4, one constant current adjusting resistor RS is grounded to realize high brightness, and the radar outputs the negative signal to control the disconnection of the constant current adjusting resistor RS in the IC integrated control module 4 to realize low brightness, so that the output of reduced and increased power is obtained.
The design scheme can only be a product with small double-lighting power difference below 20W, and cannot meet the actual requirements if the design scheme requires places with large power, such as a street lamp tunnel lamp parking lot and the like; if the lamp is highlighted by 200W and is lightened by 3W, the lamp cannot be lightened or even burnt out when the lamp is designed by 3W according to 200W.
The embodiment 1 of the invention is to add a module A or a module B to overcome the problems based on the original design, see FIG. 2, and the radar induction LED driven double-lighting control system comprises a main circuit, wherein the main circuit comprises an AC input module 1, an EMI module 2, a rectifying and filtering module 3, an IC integrated control module 4, a current limiting resistor R5, a MOS tube 6, an inductance module 7, a rectifying and filtering module 8 and an LED load module 9 which are electrically connected in sequence; the integrated circuit comprises an Integrated Circuit (IC) module 4, a radar control module 10, a power supply module 7 and a constant current adjusting resistor RS, wherein the IC module 4 comprises an IC integrated controller, a power supply voltage VCC, a control MOS tube Q and a constant current adjusting resistor RS; the IC integrated controller is respectively and electrically connected with the current limiting resistor R and the constant current adjusting resistor RS, the input of the control MOS tube Q is electrically connected with the power supply voltage VCC, and the output of the control MOS tube Q is electrically connected with the IC integrated controller; the radar control module 10 is grounded with the main circuit, and the output end is electrically connected with the control end of the control MOS tube Q to control the IC integrated control module 4.
The power supply circuit comprises a power supply resistor R1 and a constant current resistor RA, and is characterized by further comprising a module A, wherein the module A comprises a chip IC2, an inductance coil L, a diode D, a power supply resistor R1 and a constant current resistor RA; the power supply end of the module A is electrically connected with the power supply of the rectifying and filtering module 3, the input end of the module A is electrically connected with the primary end of the inductance coil L, and the output end of the module A is electrically connected with the LED load module 9; the power output end of the rectifying and filtering module 3 is connected to the chip IC2 through the power supply resistor R1, one output pin of the chip IC2 is connected with the resistor RA to the ground to regulate low-brightness output current, the input pin of the chip IC2 is connected with one primary end of the inductance coil L, the other primary end of the inductance coil L is connected with the power supply of the rectifying and filtering module 3 to complete oscillation work, and the secondary stage of the inductance coil L is connected to the LED load module 9 through the output of the diode D.
The power supply circuit also comprises a module B (replacing the module A), wherein the module B comprises a power supply resistor RB, a triode Q1, a triode Q2, a diode DA, a reference voltage stabilizing tube DZ and a resistor RC; the input end of the module B is electrically connected with a power supply of the rectifying and filtering module 3, and the output end of the module B is electrically connected with the LED load module 9; the power output end of the rectifying and filtering module 3 is connected with the base electrode of a triode Q1 through a power supply resistor RB and is simultaneously connected with a voltage stabilizing reference voltage stabilizing tube DZ to the ground to establish reference voltage, the collector electrode of the triode Q1 is amplified and output to a power triode Q2 to conduct the power triode Q2, the power output end of the rectifying and filtering module 3 is connected with an LED load module 9 through a diode DA constant current by the triode Q2, and then the power output end of the rectifying and filtering module flows into the ground through a constant current resistor RC by the LED load module 9.
The module A or B circuit and the main circuit are designed on the same circuit board to complete integration.
The working principle is as follows:
other parts except the connection mode of the radar control module 10 and the addition of the module A or the module B are basically the same as those of FIG. 1, wherein the output of the signal of the radar control module 10 controls the control MOS tube Q to control the VCC power supply of the IC integrated control module 4 by the control MOS tube Q, the on-off of the power supply voltage VCC is controlled instead of the shunt resistor RS, the working state of a main circuit is not damaged and the IC integrated control module 4 is not damaged due to the cutting-off of the resistor RS, so that a holding circuit controls the MOS tube Q to be conducted when a radar induction signal arrives so that the power supply voltage VCC of the IC integrated control module 4 is electrified, the IC integrated control module 4 works normally, and a lamp is a single gear with high-brightness constant-current output at the moment; when the radar signal is lost, the control MOS tube Q is blocked, the IC integrated control module 4 loses the power supply voltage VCC and stops working and high brightness failure, so that the design of the original parameters is kept unchanged, and the reliability of the driving circuit is enhanced.
In addition, the low brightness of the product is independently finished by the module A or the module B, the design performance of the high brightness is not influenced, and the problem of large power difference between two gears of driving is avoided.
The first method is to use a module A, wherein the power supply of a chip IC2 of the module A is to take a front-stage rectification output power supply; the chip IC2 is supplied to the load LED after being rectified by the inductance coil L and the diode, and parameters of RA and the inductance coil L in the module A are adjusted to obtain the required low-brightness power.
The other method is to replace the module A with the module B, the working power supply of the module B is the same as the module A, the parameters of the RB are adjusted to enable the triode Q1 to be conducted, the triode Q2 is conducted, when the triode Q2 is conducted, the current flows into the load LED through the diode forward through the power supply to the triode Q2 and then flows into the negative end of the power supply through the resistor RC, the base to the emitting base of the triode Q1 are connected with the reference voltage stabilizing tube DZ for keeping the output current constant, and the parameters of the RC and the reference voltage stabilizing tube DZ are adjusted to enable the required low-brightness power to be obtained.
The design realizes the integrated design requirement of driving the same load by the same device. The problem that the integrated high-power radar sensing product can not control the two-gear brightness with larger gap is fundamentally solved by adopting the design scheme.
The two-gear output control loop is independent and non-interfering, so that the optimal state of the two-gear output control loop can be overcome, and the optimal state of the two-gear output control loop cannot be damaged due to gear conversion. The two independent loops also avoid the interference of the radar module, ensure the stability of the radar sensing module, and ensure the high reliability and the longer service life of the product.
Of course, the above description is not limited to the above examples, and the technical features of the present invention that are not described may be implemented by or by using the prior art, which is not described herein again; the above examples and drawings are only for illustrating the technical scheme of the present invention and not for limiting the same, and the present invention has been described in detail with reference to the preferred embodiments, and it should be understood by those skilled in the art that changes, modifications, additions or substitutions made by those skilled in the art without departing from the spirit of the present invention and the scope of the appended claims.
Claims (4)
1. The radar induction LED driven double-brightness control system comprises a main circuit, wherein the main circuit comprises an AC input module (1), an EMI module (2), a rectifying and filtering module (3), an IC integrated control module (4), a current limiting resistor R (5), an MOS tube (6), an inductance module (7), a rectifying and filtering module (8) and an LED load module (9) which are electrically connected in sequence; the method is characterized in that: the integrated circuit comprises an Integrated Circuit (IC) integrated control module (4), a radar control module (10) and a power supply module (7), wherein the IC integrated control module (4) comprises an IC integrated controller, a power supply voltage VCC, a control MOS tube Q and a constant current adjusting resistor RS; the IC integrated controller is respectively and electrically connected with the current limiting resistor R and the constant current adjusting resistor RS, the input of the control MOS tube Q is electrically connected with the power supply voltage VCC, and the output of the control MOS tube Q is electrically connected with the IC integrated controller; the radar control module (10) is grounded together with the main circuit, the output end of the radar control module (10) and the control end of the control MOS tube Q control VCC power supply of the IC integrated control module (4), the holding circuit controls the MOS tube Q to be conducted when radar induction signals arrive so that the power supply voltage VCC of the IC integrated control module (4) is powered on, the IC integrated control module (4) works normally, and at the moment, the lamp is a single gear with high-brightness constant-current output; when the radar signal is lost, the control MOS tube Q is blocked, and the IC integrated control module (4) loses the power supply voltage VCC to stop working and lose efficacy of high brightness.
2. The radar-induced LED-driven dual-lighting control system of claim 1, wherein: the power supply circuit comprises a power supply resistor R1 and a constant current resistor RA, and is characterized by further comprising a module A, wherein the module A comprises a chip IC2, an inductance coil L, a diode D, a power supply resistor R1 and a constant current resistor RA; the power supply end of the module A is electrically connected with the power supply of the rectifying and filtering module (3), the input end of the module A is electrically connected with the primary end of the inductance coil L, and the output end of the module A is electrically connected with the LED load module (9); the power output end of the rectifying and filtering module (3) is connected to the chip IC2 through the power supply resistor R1, one output pin of the chip IC2 is connected with the resistor RA to the ground to regulate low-brightness output current, the input pin of the chip IC2 is connected with one primary end of the inductance coil L, the other primary end of the inductance coil L is connected with the power supply of the rectifying and filtering module (3) to complete oscillation work, and the secondary stage of the inductance coil L is connected to the LED load module (9) through the output of the diode D.
3. The radar-induced LED-driven dual-lighting control system of claim 2, wherein: the power supply circuit comprises a power supply resistor RB, a triode Q1, a triode Q2, a diode DA, a reference voltage regulator DZ and a resistor RC; the input end of the module B is electrically connected with a power supply of the rectifying and filtering module (3), and the output end of the module B is electrically connected with the LED load module (9); the power output end of the rectifying and filtering module (3) is connected with the base electrode of the triode Q1 through the power supply resistor RB and is simultaneously connected with the voltage stabilizing reference voltage stabilizing tube DZ to the ground to establish reference voltage, the collector electrode of the triode Q1 is amplified and output to the power triode Q2 to conduct the power triode Q2, the power output end of the rectifying and filtering module (3) is connected into the LED load module (9) through the triode Q2 and the diode DA in a constant current manner, and then the power output end of the rectifying and filtering module flows into the ground through the constant current resistor RC by the LED load module (9).
4. A radar-induced LED-driven dual-lighting control system according to claim 2 or 3, wherein: the module A or B circuit and the main circuit are designed on the same circuit board to complete integration.
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| CN201710694544.6A CN107517516B (en) | 2017-08-15 | 2017-08-15 | Radar induction LED driven double-brightness control system |
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| CN201710694544.6A CN107517516B (en) | 2017-08-15 | 2017-08-15 | Radar induction LED driven double-brightness control system |
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| CN107517516B true CN107517516B (en) | 2023-10-27 |
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| CN110113844A (en) * | 2019-05-31 | 2019-08-09 | 重庆励华芯微电子有限公司 | A kind of control circuit and its monitoring camera, monitoring system of LED |
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| CN107517516A (en) | 2017-12-26 |
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