CN113518493B - Flash relay for controlling LED steering lamp to flash and control method - Google Patents

Flash relay for controlling LED steering lamp to flash and control method Download PDF

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Publication number
CN113518493B
CN113518493B CN202110449784.6A CN202110449784A CN113518493B CN 113518493 B CN113518493 B CN 113518493B CN 202110449784 A CN202110449784 A CN 202110449784A CN 113518493 B CN113518493 B CN 113518493B
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loop
output
mcu
switch
mos tube
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CN113518493A (en
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李红星
付强
游文质
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Chongqing Hecheng Electric Appliance Co ltd
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Chongqing Hecheng Electric Appliance Co ltd
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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]
    • H05B45/30—Driver circuits
    • H05B45/37—Converter circuits
    • H05B45/3725—Switched mode power supply [SMPS]
    • 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]
    • H05B45/30—Driver circuits
    • H05B45/345—Current stabilisation; Maintaining constant current
    • 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]
    • H05B45/30—Driver circuits
    • H05B45/36—Circuits for reducing or suppressing harmonics, ripples or electromagnetic interferences [EMI]
    • 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]
    • H05B45/50—Circuit arrangements for operating light-emitting diodes [LED] responsive to malfunctions or undesirable behaviour of LEDs; responsive to LED life; Protective circuits
    • 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

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  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Lighting Device Outwards From Vehicle And Optical Signal (AREA)

Abstract

The invention discloses a flash relay for controlling the flicker of an LED steering lamp and a control method, wherein the flash relay comprises an MCU loop, an input voltage sampling loop, an MCU power loop, an input end B, output ends E and L, a switch MOS tube, a MOS tube driving loop and an output current sampling loop; the control method comprises the following steps: 1) The MCU starts to work and is initialized; 2) The input voltage sampling loop collects input voltage; 3) MCU judges the input voltage value U Input device Whether the working voltage range of the steering lamp is within the range of Umin-Umax; 4) MCU controls the switch MOS transistor to switch and output; 5) The MCU controls the switch MOS tube to switch and output according to normal flicker or controls the switch MOS tube to switch and output according to a flash mode. The invention can accurately judge the state of the steering lamp and control the steering lamp to perform a corresponding flickering mode.

Description

Flash relay for controlling LED steering lamp to flash and control method
Technical Field
The invention relates to the field of motorcycle electronic elements, in particular to a flash relay for controlling the flash of an LED steering lamp and a control method.
Background
With the popularization of LED lamps, the lamps on motorcycles and electric motorcycles are gradually changed from incandescent lamps to LED lamps, wherein the steering lamps are also changed from 10W and above incandescent lamps to LED lamps of about 3W, and if the flashing relay for controlling the flashing of the incandescent lamps is continuously used after the lamps are changed, the flashing frequency of the LED lamps exceeds the regulation requirement, so that the flashing relay special for controlling the LED lamps is needed to be adopted for controlling the flashing of the lamps.
The technical requirement of the flash relay is that when the lamp is in a normal state, the frequency is required to be controlled to be (60-120) times/min when the lamp flashes; when the turn signal lamp loop is open or the bulb open mode is damaged, the flicker frequency of the lamp is required to be controlled to be 2 times that of a normal lamp, and a driver is reminded to maintain the lamp, so that safety accidents are avoided.
The most commonly used front and rear steering lamps are flash relays of 10W+10W incandescent lamps at present, when the working voltage is 13.5V, the steering lamps are lightened by the power-on output of the flash relays, the working current of the lamp is about 1.48A, the lamp is judged to be normal after the identification current is sampled by the current of the flash relays, and the lamp is enabled to flash by switching output according to the frequency of (60-120) times/min; when one of the 10W lamps is opened, the current is reduced by about 0.74A, the lamp is judged to have open circuit damage after the flash relay current is sampled and identified, and the switching output is carried out according to [ (60-120) times/min ] X2 frequency. However, after the LED lamp is used, as most of LED lamps are about 3W, the working voltage is 13.5V, when the front and rear steering lamps 3W+3W are in normal operation, the current is about 0.45A, and the current is lower than the current of 0.74A when 1 of 10W incandescent lamps are opened; therefore, after the flashing relay for controlling the incandescent lamp at present is adopted, the current sampling is judged to be damaged, so that the LED lamp 2 flashes, and the driver is erroneously prompted that the lamp has open circuit damage. However, when the 10W incandescent lamp and the 3W LED lamp are used in a mixed mode, the existing flash relay cannot be controlled effectively.
In addition, the existing flash relay is generally not provided with an overvoltage protection function, when the system voltage is abnormal, the input overvoltage reaches 18-24V, the flash relay can bear the voltage, but when the voltage reaches 18-24V, the working current is increased due to the fact that the LED lamp is not constant, the LED lamp beads seriously heat, the service life of the LED lamp beads is reduced or the LED lamp beads are overheated and damaged.
Disclosure of Invention
Aiming at the defects existing in the prior art, the invention aims to solve the problems that the existing flashing relay cannot control the LED and incandescent lamp mixed steering lamp of the motorcycle to flash in the corresponding state and cannot perform overvoltage protection on the LED and the incandescent lamp steering lamp; the flashing relay and the control method for controlling the flashing of the LED turn lamps can be used for identifying according to the working current of the LEDs and the working current of the LED and incandescent lamp mixed turn lamps, so that whether the turn lamps are normal lamps or abnormal states can be accurately judged, and the turn lamps are controlled to perform corresponding flashing modes; meanwhile, when overvoltage is input, the operation of the steering lamp can be controlled through the action of the flashing relay, so that the overvoltage work of the steering lamp is avoided, and further the service life of the steering lamp is shortened and damaged.
In order to solve the technical problems, the technical scheme adopted by the invention is as follows: the flash relay comprises an MCU loop, an input voltage sampling loop, an MCU power loop, an input end B, output ends E and L, wherein a B, E end forms a control loop, and a B, L end forms an output loop; the MCU power supply loop is connected with the control loop in parallel and supplies power for the MCU loop; the input voltage sampling loop is connected with the control loop in parallel and provides an input voltage signal for the MCU loop; the method is characterized in that: the device also comprises a switch MOS tube, a MOS tube driving loop and an output current sampling loop; the switching MOS tube is connected with the output loop in series, and the MCU loop is connected with the switching MOS tube through the MOS tube driving loop so as to perform switching control on the switching MOS tube; the current sampling loop is connected in series with the output loop and provides an output current signal for the MCU loop; the MCU loop carries out operation according to the voltage signal provided by the input voltage sampling loop and the current signal provided by the current sampling loop, and carries out switch control on the switch MOS tube through the MOS tube driving loop.
An input voltage sampling loop, an output switch loop, wherein a B, E end forms a control loop, and a B, L end forms an output loop; the input voltage sampling loop is connected with the control loop in parallel and is used for detecting input voltage; the output switch loop is connected in series with the output loop and is used for controlling the on-off of the output loop; the input voltage sampling loop and the output switching loop are both connected with an MCU, and the MCU controls the output switching loop to work according to the voltage acquired by the voltage sampling loop.
Further, the power supply input reverse connection preventing circuit is connected in series with the output circuit and used for blocking current when the power supply is in reverse connection.
Further, the device also comprises an input filtering anti-interference loop, wherein the input filtering anti-interference loop control loop is connected in parallel and is used for absorbing an input interference signal and stabilizing input voltage;
further, the system also comprises an output anti-interference loop, wherein the output anti-interference loop is connected in parallel with the output loop and is used for suppressing interference brought by the load of the output port and the system thereof.
A control method of a flash relay is characterized in that; the method comprises the following steps:
1) After the power switch is turned on, the MCU starts to work and is initialized;
2) The input voltage sampling loop collects input voltage and feeds the input voltage back to the MCU;
3) MCU judges the input voltage value U Input device Whether the operating voltage range of the steering lamp is within the range of Umin-Umax, when U Input device < Umin, judge as under-voltage, U Input device Judging that the voltage is larger than Umax, and then outputting a turn-off signal to a MOS tube driving loop by the MCU to control the switch MOS tube to turn off the output; then after the interval time T1 (500 mu s), resetting the detection result, and re-detecting the input voltage, thereby cycling;
4) When U is less than or equal to U Input device When the Umax is less than or equal to the Umax, the MCU controls the switch MOS tube to switch and output; meanwhile, an output current sampling loop collects output current and feeds the output current back to the MCU;
5) After the steering switch is turned on, the current acquisition loop acquires current, the MCU controls and outputs 1 working time T2 and 1 stopping time T3, and meanwhile, the MCU loop calculates in the working time to obtain a lamp current value I2; when the current value is 2 lamp current values, the MCU controls the switch MOS tube to switch and output according to normal flicker; when the output current value is 1 lamp current value, the MCU controls the switch MOS tube to switch and output according to the flash mode through the MOS tube driving circuit.
Further, the normal blinking pattern is: 600 mS-1000 mS period, the lighting rate is 35-65% and the switch action is output; the flash mode is: and the lighting rate is 35 to 65 percent in a period of 250mS to 460mS, and the switching operation is output.
Further, when Umin is less than or equal to U Input device When the Umax is less than or equal to the Umax, the MCU firstly controls the switch MOS tube to be turned on for outputting the power supply time T4; when the steering switch is in an off state, the current acquisition loop feeds back no current, and the MCUThe MOS tube of the control switch is turned off, the output time T5 is stopped, and whether the steering switch is turned on or not is judged in a circulating way;
when the current signal acquired by the current acquisition loop reaches 1.2-1.5 times or more of rated current of 2 lamps, the MCU controls the switch MOS tube to be turned off, stops outputting the time T5, and controls the switch MOS tube to be turned on again after the intermittent time T6 to output the power supply time T4 for current sampling, so that the circulation action is realized; and after the lamp current is recovered, the MCU controls the switch MOS tube to switch and output according to a normal flicker mode.
Further, the output anti-interference loop absorbs and processes interference signals generated on a switch and a cable in the system, and the accuracy of action current is guaranteed, so that the accuracy of current sampled by the MCU loop is further guaranteed, and the reliable action of the switch MOS tube is controlled.
Compared with the prior art, the invention has the following advantages:
1. according to the invention, the current is sampled to the MCU through the current sampling loop to calculate the current, so that the lamp state judgment under the condition of small current when the LED lamp works can be realized, and the working modes of the steering lamp in different states are ensured to be accurate.
2. According to the invention, through accurate sampling and judgment of the MCU on the output current, false operation can be avoided when 1 steering lamp is an incandescent lamp and the other 1 steering lamp is an LED lamp on the vehicle.
3. The invention can realize that the voltage output to the lamp by the flash relay cannot be over-voltage, so that the current passing through the lamp beads in the LED lamp is stable, the lamp beads heat within the design value, and the service life of the lamp is ensured.
4. The scheme can also be used for a traditional incandescent lamp turn lamp system, and only the current setting parameters are required to be modified; and meanwhile, the service life of the incandescent lamp is prevented from being reduced due to the fact that the incandescent lamp is operated at high voltage caused by overvoltage output.
Drawings
Fig. 1 is a schematic block diagram of the circuit of the present invention.
Fig. 2 is a schematic diagram of the system of the present invention as assembled for use.
Fig. 3 is a control flow chart of the MCU.
Fig. 4 is a waveform diagram illustrating the operation of the present invention.
Detailed Description
The invention will be further described with reference to the drawings and examples.
Examples: referring to fig. 1 to 2, a flash relay for controlling the flash of an LED turn signal lamp includes an MCU loop, an input voltage sampling loop, an MCU power supply loop, an input terminal B, and output terminals E and L, wherein a B, E terminal constitutes a control loop, and a B, L terminal constitutes an output loop. The MCU power supply loop is connected with the control loop in parallel and supplies power for the MCU loop; the input voltage sampling loop is connected in parallel with the control loop and provides an input voltage signal to the MCU loop. The power supply input reverse connection preventing circuit is connected in series with the output circuit and is used for blocking current when the power supply is in reverse connection. The input filter anti-interference loop control circuit is connected in parallel and is used for absorbing an input interference signal and stabilizing input voltage.
The device also comprises a switch MOS tube, a MOS tube driving loop and an output current sampling loop; the switching MOS tube is connected with the output loop in series, and the MCU loop is connected with the switching MOS tube through the MOS tube driving loop so as to perform switching control on the switching MOS tube; the current sampling loop is connected in series with the output loop and provides an output current signal to the MCU loop. The MCU loop carries out operation according to the voltage signal provided by the input voltage sampling loop and the current signal provided by the current sampling loop, and carries out switch control on the switch MOS tube through the MOS tube driving loop.
An input voltage sampling loop, an output switch loop, wherein a B, E end forms a control loop, and a B, L end forms an output loop; the input voltage sampling loop is connected with the control loop in parallel and is used for detecting input voltage; the output switch loop is connected in series with the output loop and is used for controlling the on-off of the output loop; the input voltage sampling loop and the output switching loop are both connected with an MCU, and the MCU controls the output switching loop to work according to the voltage acquired by the voltage sampling loop.
The system also comprises an output anti-interference loop, wherein the output anti-interference loop is connected in parallel with the output loop and is used for suppressing interference brought by an output port load and a system thereof.
Referring to fig. 3 and fig. 4, a control method of a flash relay is characterized in that; the method comprises the following steps:
1) After the power switch S1 is switched on, current is input into the anti-reverse connection loop, the filtering anti-interference loop and the MCU power loop to the MCU loop through the power supply, and the MCU starts to work and is initialized.
2) The input voltage sampling loop collects input voltage and feeds the input voltage back to the MCU.
3) MCU judges the input voltage value U Input device Whether or not the lamp is normal (within the operating voltage range Umin-Umax of the steering lamp), when U Input device < Umin, judge as under-voltage, U Input device Judging that the voltage is larger than Umax, and then outputting a turn-off signal to a MOS tube driving loop by the MCU to control the switch MOS tube to turn off the output; then after the interval time T1 (500 mu s), resetting the detection result, and re-detecting the input voltage, thereby cycling; generally, umin is set to 8V-9V; umax is set to 15V-16V, so that the condition that the excessive voltage is output to the LED lamp and the overvoltage service life of the lamp is reduced or damaged is avoided.
4) When U is less than or equal to U Input device When the Umax is less than or equal to the Umax, the MCU controls the switch MOS tube to switch and output; meanwhile, the output current sampling loop collects output current and feeds the output current back to the MCU.
5) After the steering switch S2 is turned on, the current acquisition loop acquires current, the MCU controls and outputs 1 working time T2 (350 mS) and 1 stopping time T3 (350 mS), and meanwhile, the MCU loop calculates and obtains a lamp current value in the working time; when the current value is the rated current value of 2 lamps, the MCU controls the switch MOS tube to switch and output according to normal flicker in the 2 nd and subsequent periods; when the output current value is 1 lamp current value, the MCU controls the switch MOS tube to switch and output according to the flash mode through the MOS tube driving circuit in the 2 nd and later periods. Wherein, the normal flicker mode is: 600 mS-1000 mS cycle ((60-120) times/min), and the lighting rate is 35-65% for switching operation output; the flash mode is: the lighting rate is 35-65% and the switching operation is output in 250 mS-460 mS period ((130-250) times/min) X2).
When U is less than or equal to U Input device When the Umax is less than or equal to the Umax, the MCU firstly controls the switch MOS tube to be turned on for outputting the power supply time T4 2mS; when the steering switch is in an off state, the output end is not loaded, the current acquisition loop feeds back no current, the MCU controls the switch MOS tube to be turned off, the output time T5 128mS is stopped, and whether the steering switch is turned on or not is judged in a circulating mode.
When the current signal acquired by the current acquisition loop reaches 1.2-1.5 times or more of rated current of 2 lamps, the MCU controls the switch MOS tube to be turned off, stops outputting the time T5 128mS, and controls the switch MOS tube to be turned on again after the intermittent time T6 2mS to output the power supply time T4 for current sampling, so that the circulation action is realized; and after the lamp current is recovered, the MCU controls the switch MOS tube to switch and output according to a normal flicker mode.
In the working process, the output anti-interference loop absorbs and processes interference signals on a switch and a cable in the system, and the accuracy of action current is guaranteed, so that the accuracy of current sampled by the MCU loop is further guaranteed, and the reliable action of the switch MOS tube is controlled.
Finally, it should be noted that the above embodiments are only for illustrating the technical solution of the present invention and not for limiting the technical solution, and those skilled in the art should understand that modifications and equivalents may be made to the technical solution of the present invention without departing from the spirit and scope of the present invention, and all such modifications and equivalents are included in the scope of the claims.

Claims (3)

1. The control method of the flash relay comprises an MCU loop, an input voltage sampling loop, an MCU power supply loop, an input end B and output ends E and L, wherein a B, E end forms a control loop, and a B, L end forms an output loop; the MCU power supply loop is connected with the control loop in parallel and supplies power for the MCU loop; the input voltage sampling loop is connected with the control loop in parallel and provides an input voltage signal for the MCU loop; the device also comprises a switch MOS tube, a MOS tube driving loop and an output current sampling loop; the switching MOS tube is connected with the output loop in series, and the MCU loop is connected with the switching MOS tube through the MOS tube driving loop so as to perform switching control on the switching MOS tube; the current sampling loop is connected in series with the output loop and provides an output current signal for the MCU loop; the MCU loop carries out operation according to the voltage signal provided by the input voltage sampling loop and the current signal provided by the current sampling loop, and carries out switch control on the switch MOS tube through the MOS tube driving loop;
an input voltage sampling loop, an output switch loop, wherein a B, E end forms a control loop, and a B, L end forms an output loop; the input voltage sampling loop is connected with the control loop in parallel and is used for detecting input voltage; the output switch loop is connected in series with the output loop and is used for controlling the on-off of the output loop; the input voltage sampling loop and the output switching loop are both connected with an MCU, and the MCU controls the output switching loop to work according to the voltage acquired by the voltage sampling loop;
the method is characterized in that; the method comprises the following steps:
1) After the power switch is turned on, the MCU starts to work and is initialized;
2) The input voltage sampling loop collects input voltage and feeds the input voltage back to the MCU;
3) MCU judges the input voltage value U Input device Whether the operating voltage range of the steering lamp is within the range of Umin-Umax, when U Input device < Umin, judge as under-voltage, U Input device Judging that the voltage is larger than Umax, and then outputting a turn-off signal to a MOS tube driving loop by the MCU to control the switch MOS tube to turn off the output; then after the interval time T1, resetting the detection result, and re-detecting the input voltage, thereby circulating;
4) When U is less than or equal to U Input device When the Umax is less than or equal to the Umax, the MCU controls the switch MOS tube to switch and output; meanwhile, an output current sampling loop collects output current and feeds the output current back to the MCU;
when U is less than or equal to U Input device When the Umax is less than or equal to the Umax, the MCU firstly controls the switch MOS tube to be turned on for outputting the power supply time T4; when the steering switch is in an off state, the current acquisition loop feeds back no current, the MCU controls the switch MOS tube to be turned off, the output time T5 is stopped, and whether the steering switch is turned on or not is judged in a circulating way; when the current signal acquired by the current acquisition loop reaches 1.2-1 of rated current of 2 lampsWhen the power supply time is 5 times or more, the MCU controls the switch MOS tube to be turned off, the output time T5 is stopped, the switch MOS tube is controlled to be turned on again after the intermittent time T6, the output power supply time T4 is turned on, and current sampling is carried out, so that the circulation action is realized; after the lamp current is recovered, the MCU controls the switch MOS tube to switch and output according to a normal flicker mode;
5) After the steering switch is turned on, the current acquisition loop acquires current, the MCU controls and outputs 1 working time T2 and 1 stopping time T3, and meanwhile, the MCU loop calculates in the working time to obtain a lamp current value I2; when the current value is 2 lamp current values, the MCU controls the switch MOS tube to switch and output according to normal flicker; when the output current value is 1 lamp current value, the MCU controls the switch MOS tube to switch and output according to the flash mode through the MOS tube driving circuit.
2. The control method of the flash relay according to claim 1, wherein: the normal blinking pattern is: 600 mS-1000 mS period, the lighting rate is 35-65% and the switch action is output; the flash mode is: and the lighting rate is 35 to 65 percent in a period of 250mS to 460mS, and the switching operation is output.
3. The control method of the flash relay according to claim 1, wherein: and the output anti-interference loop absorbs and processes interference signals on a switch and a cable in the system.
CN202110449784.6A 2021-04-25 2021-04-25 Flash relay for controlling LED steering lamp to flash and control method Active CN113518493B (en)

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CN205051384U (en) * 2015-09-25 2016-02-24 东莞新能德科技有限公司 Battery management circuit
CN206611171U (en) * 2017-03-30 2017-11-03 安徽徽电科技股份有限公司 A kind of arc light protecting device switched based on fast vacuum

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