Solving the problem of cold resistance affecting navigation light controller protection circuit and control method thereof
Through the combination of time-based chip, current sensor, transistor and optocoupler, the problem of large impact current in the early stage of power supply of navigation lights is solved, and effective protection of impact current and improved accuracy of navigation light control is achieved.
Patent Information
- Application Number
- CN202210294903.X
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- Filing Date
- 2022-03-24
- Publication Date
- 2025-04-15
- Estimated Expiration
- 2042-03-24
AI Technical Summary
The impact current of the navigation lights is relatively large in the early stage of power supply, which causes ordinary circuits to be unable to identify whether it is the impact current or the large current caused by the short circuit, which affects the control effect of the navigation lights.
The combination of time-based chip, current sensor, transistor and optocoupler is adopted to collect the induction voltage signal of the incandescent lamp through the current sensor. The time-based chip processes and outputs the level signal. The transistor turns on and opens the optocoupler when receiving the high-level signal, so that the filament is constantly heated until the filament resistance becomes larger, playing a protective role.
Effectively eliminate the impact of excessive shock current in the early stage of power supply, prevent ordinary circuits from being misidentified as short circuit, and greatly improve the accuracy and reliability of navigation light control.
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Figure CN114630461B_ABST
Abstract
Description
Technical Field
[0001] The present invention relates to the technical field of navigation light controllers, and in particular to a protection circuit and a control method thereof for solving the problem of cold resistance affecting a navigation light controller. Background Art
[0002] Navigation lights refer to the signal lights used by aircraft or ships to indicate their position and direction of movement when sailing at night, so as to facilitate mutual avoidance and identification. Ships are equipped with red lights on the port side, green lights on the starboard side, and white lights on the mast and stern; non-motorized ships are equipped with sidelights; wooden sailboats are only equipped with a white light. The navigation light controller is a device on the ship that centrally controls the on and off of the navigation lights and can sound an alarm when the navigation lights fail. Cold resistance refers to the resistance of a device when there is no current, that is, at room temperature, generally referring to the resistance at 25°C.
[0003] At present, navigation lights use 220V incandescent lamps. When not powered on, the internal resistance of the filament is small. In the initial stage of power supply, the impact current is large, which makes it impossible for ordinary circuits to identify whether it is an impact current or a large current caused by a short circuit, affecting the control effect of the navigation lights and failing to meet the use requirements. Therefore, the market urgently needs to solve the problem of cold resistance affecting the protection circuit of the navigation light controller and its control method to solve these problems. Summary of the invention
[0004] The object of the present invention is to provide a protection circuit and a control method for a navigation light controller that solves the problem of cold resistance affecting the controller, so as to solve the problem mentioned in the background technology that when no power is supplied, the internal resistance of the filament is small, and at the initial stage of power supply, the surge current is large, which makes it impossible for ordinary circuits to identify whether it is a surge current or a large current caused by a short circuit, thus affecting the control effect of the navigation lights.
[0005] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: to solve the problem of cold resistance affecting the navigation light controller protection circuit, including a time base chip, a 220V incandescent lamp, a current sensor, a diode, a light emitting diode, a transistor, an IGBT tube, a resistor, a capacitor, a bridge rectifier, an optocoupler and a circuit, wherein two time base chips are provided, and the two time base chips are respectively provided as a time base chip U15A and a time base chip U15B, two transistors are provided, and the two transistors are respectively a transistor TR1 and a transistor TR2, the two time base chips are both NE556DR model, and the transistor is PMBT3904 model, the 18th, 12th and 11th pins of the time base chip U15B are externally connected to a pulse adjustment circuit, the 7th pin series resistor R6 of the current sensor is electrically connected to the 6th pin of the time base chip U15A, and the 5th pin of the time base chip U15A is electrically connected to the 10th pin of the time base chip U15B.
[0006] Preferably, the pulse regulation circuit includes a resistor R47, a resistor R95 and a capacitor C49, the resistor R47 and the resistor R95 are connected in series, and one end of the resistor R47, the resistor R95 and the capacitor C49 are electrically connected to pins 18, 12 and 11 of the timing chip U15B respectively.
[0007] Preferably, pin 2 of the bridge rectifier is connected to a 220V incandescent lamp, and pin 3 of the bridge rectifier is connected to pins 3 and 4 of the current sensor.
[0008] Preferably, the resistor R19 in series with the pin B of the transistor TR1 is electrically connected to the pin 9 of the time base chip U15B, and the pin E of the transistor TR1 is grounded, and the diode D8 in series with the pin C of the transistor TR1 is electrically connected to the optocoupler.
[0009] Preferably, the B pin of the transistor TR2 is electrically connected to the 5th pin of the timing chip U15A through a series resistor R20, and the E pin of the transistor TR2 is grounded, the C pin of the transistor TR2 is electrically connected to the 6th pin of the timing chip U15A, and the B pin of the transistor TR2 is electrically connected to the 9th pin of the timing chip U15B through a series diode D16.
[0010] Preferably, the G pin of the IGBT tube Q1 is connected in series with a resistor R137 and is electrically connected to the optocoupler, the S pin of the IGBT tube Q1 is connected in parallel with the diode TVS1 and the capacitor C28 respectively, and the D pin of the IGBT tube Q1 is connected in series with a resistor R55 and is electrically connected to the 1st and 2nd pins of the current sensor, and a diode is connected between the S pin of the IGBT tube Q1 and the D pin of the IGBT tube Q1.
[0011] Preferably, the light emitting diode and the resistor R42 are connected in series and electrically connected to pin 5 of the timing chip U15A.
[0012] The control method for solving the problem of cold resistance affecting the protection circuit of the navigation light controller includes the following steps:
[0013] Step 1: Turn on the power and light up the 220V incandescent lamp;
[0014] Step 2: Set the parameters of resistor R47, resistor R95 and capacitor C49, and set the on-time of the pulse signal to 20 and 30uS, and the flip cycle to 20 and 30mS;
[0015] Step 3: When the signal O1 is at a low level, the optocoupler P6 is turned on, GATE1 is at a high level, and the current flowing through the 220V incandescent lamp passes through the current sensor to collect the sensing signal, and then the sensing voltage signal ADC0 is sent to the 6th pin of the time base chip U15A;
[0016] Step 4: When the impact current is large and the induced voltage signal ADC0 is small, the 5th pin of the timing chip U15A outputs a high level and is sent to the 10th pin of the timing chip U15B;
[0017] Step 5: When the 10th pin of the timing chip U15B receives a high-level signal, it will enter a high-duty-cycle multivibrator state. The 9th pin of the timing chip U15B will continuously output a high level, so that the transistor TR1 is turned on, and the optocoupler P6 is turned on, so that the filament is continuously heated until the filament resistance increases to a critical value, which plays a protective role.
[0018] Step 6: When the impact current is small, the induced voltage signal ADC0 is large, and the 5th pin of the timing chip U15A outputs a low level and is sent to the 10th pin of the timing chip U15B;
[0019] Step 7: After receiving a low level, the internal pin 10 of the timing chip U15B is automatically reset. The pin 9 of the timing chip U15B outputs a low level, and the transistor TR1 will not be turned on. The optocoupler P6 is always turned on, GATE1 is a high level, and the 220V incandescent lamp works normally.
[0020] Compared with the prior art, the present invention has the following beneficial effects:
[0021] 1. The invention uses the current sensor, time base chip, transistor and optocoupler to collect the induced voltage signal of the incandescent lamp, process it with the help of the time base chip, and output the corresponding level signal. When the transistor receives the high level signal, it conducts and turns on the optocoupler, so that the filament is continuously heated until the filament resistance increases to a critical value, thereby eliminating the impact of excessive impact current and playing a protective role. It solves the problem that in the early stage of power supply, the impact current is large, which makes it impossible for ordinary circuits to identify whether it is caused by impact current or short circuit.
[0022] 2. The invention adopts the configuration of bridge rectifier and IGBT tube. The bridge rectifier can convert AC into DC for power supply, which can reduce the impact current amplitude. The IGBT tube can realize signal transmission and isolate non-standard signals or interference signals, thus improving the signal quality. The problem that the accuracy of the transmitted signal cannot be effectively guaranteed is solved.
[0023] 3. The invention can adjust the parameters of resistor R47, resistor R95 and capacitor C49 by setting resistor R47, resistor R95 and capacitor C49, thereby adjusting the duty cycle and period of the pulse signal, which can better control and protect, and solve the problem that the pulse signal cannot be adjusted. BRIEF DESCRIPTION OF THE DRAWINGS
[0024] Figure 1 It is the principle diagram of the protection circuit of the present invention. DETAILED DESCRIPTION
[0025] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.
[0026] See also Figure 1 An embodiment of the present invention solves the problem of cold resistance affecting the navigation light controller protection circuit, including a time base chip, a 220V incandescent lamp, a current sensor, a diode, a light emitting diode, a transistor, an IGBT tube, a resistor, a capacitor, a bridge rectifier, an optocoupler and a circuit. Two time base chips are provided, and the two time base chips are respectively provided as a time base chip U15A and a time base chip U15B. Two transistors are provided, and the two transistors are respectively a transistor TR1 and a transistor TR2. Both time base chips are NE556DR model, and the transistor is PMBT3904 model. The 18th, 12th and 11th pins of the time base chip U15B are externally connected to the pulse adjustment circuit, the 7th pin series resistor R6 of the current sensor is electrically connected to the 6th pin of the time base chip U15A, and the 5th pin of the time base chip U15A is electrically connected to the 10th pin of the time base chip U15B.
[0027] See also Figure 1 The pulse adjustment circuit includes a resistor R47, a resistor R95 and a capacitor C49. The resistor R47 and the resistor R95 are connected in series, and one end of the resistor R47, the resistor R95 and the capacitor C49 are electrically connected to the 18th, 12th and 11th pins of the timing chip U15B respectively. By setting the parameters of the resistor R47, the resistor R95 and the capacitor C49, the duty cycle and period of the pulse can be adjusted to meet different pulse requirements.
[0028] See also Figure 1 , the 2nd foot of the bridge rectifier is connected to the 220V incandescent lamp, and the 3rd foot of the bridge rectifier is connected to the 3rd and 4th feet of the current sensor. The bridge rectifier can convert AC power into DC power, which can reduce the amplitude of the impact current to a certain extent.
[0029] See also Figure 1 The B pin of transistor TR1 is electrically connected to the 9 pin of the timing chip U15B through the series resistor R19, and the E pin of transistor TR1 is grounded. The C pin of transistor TR1 is electrically connected to the optocoupler through the series diode D8. The optocoupler switch can be indirectly controlled through transistor TR1. Only when the B pin of transistor TR1 receives a high level signal will the transistor TR1 be turned on, and then the optocoupler is turned on.
[0030] See also Figure 1The B pin of the transistor TR2 is electrically connected to the resistor R20 in series with the 5 pin of the timing chip U15A, and the E pin of the transistor TR2 is grounded, the C pin of the transistor TR2 is electrically connected to the 6 pin of the timing chip U15A, and the B pin of the transistor TR2 is electrically connected to the diode D16 in series with the 9 pin of the timing chip U15B.
[0031] See also Figure 1 , the G pin of the IGBT tube Q1 is connected in series with the resistor R137 and electrically connected to the optocoupler, the S pin of the IGBT tube Q1 is connected in parallel with the diode TVS1 and the capacitor C28 respectively, and the D pin of the IGBT tube Q1 is connected in series with the resistor R55 and electrically connected to the 1 pin and the 2 pin of the current sensor, and a diode is connected between the S pin of the IGBT tube Q1 and the D pin of the IGBT tube Q1, so that signals can be transmitted through the IGBT tube Q1, and non-standard signals or interference signals can be isolated, thereby improving signal quality.
[0032] See also Figure 1 The light emitting diode and the resistor R42 are connected in series and electrically connected to the 5th pin of the timing chip U15A. The light emitting diode can light up the corresponding indicator light according to the operating status of the circuit, which can serve as a warning.
[0033] The control method for solving the problem of cold resistance affecting the protection circuit of the navigation light controller includes the following steps:
[0034] Step 1: Turn on the power and light up the 220V incandescent lamp;
[0035] Step 2: Set the parameters of resistor R47, resistor R95 and capacitor C49, and set the on-time of the pulse signal to 20 and 30uS, and the flip cycle to 20 and 30mS;
[0036] Step 3: When the signal O1 is at a low level, the optocoupler P6 is turned on, GATE1 is at a high level, and the current flowing through the 220V incandescent lamp passes through the current sensor to collect the sensing signal, and then the sensing voltage signal ADC0 is sent to the 6th pin of the time base chip U15A;
[0037] Step 4: When the impact current is large and the induced voltage signal ADC0 is small, the 5th pin of the timing chip U15A outputs a high level and is sent to the 10th pin of the timing chip U15B;
[0038] Step 5: When the 10th pin of the timing chip U15B receives a high-level signal, it will enter a high-duty-cycle multivibrator state. The 9th pin of the timing chip U15B will continuously output a high level, so that the transistor TR1 is turned on, and the optocoupler P6 is turned on, so that the filament is continuously heated until the filament resistance increases to a critical value, which plays a protective role.
[0039] Step 6: When the impact current is small, the induced voltage signal ADC0 is large, and the 5th pin of the timing chip U15A outputs a low level and is sent to the 10th pin of the timing chip U15B;
[0040] Step 7: After receiving a low level, the internal pin 10 of the timing chip U15B is automatically reset. The pin 9 of the timing chip U15B outputs a low level, and the transistor TR1 will not be turned on. The optocoupler P6 is always turned on, GATE1 is a high level, and the 220V incandescent lamp works normally.
[0041] It will be apparent to those skilled in the art that the invention is not limited to the details of the exemplary embodiments described above and that the invention can be implemented in other specific forms without departing from the spirit or essential features of the invention. Therefore, the embodiments should be considered exemplary and non-limiting in all respects, and the scope of the invention is defined by the appended claims rather than the foregoing description, and it is intended that all variations falling within the meaning and scope of the equivalent elements of the claims be included in the invention. Any reference numeral in a claim should not be considered as limiting the claim to which it relates.
Claims
1. A protection circuit for solving the problem of cold resistance affecting the navigation light controller, including a time base chip, a 220V incandescent lamp, a current sensor, a diode, a light emitting diode, a triode, an IGBT tube, a resistor, a capacitor, a bridge rectifier, and an optical coupler, characterized in that: There are two time base chips, and the two time base chips are respectively set as time base chip U15A and time base chip U15B. There are two transistors, and the two transistors are respectively transistor TR1 and transistor TR2. The two time base chips are selected as NE556DR model, and the transistor is selected as PMBT3904 model. The 18th, 12th and 11th pins of the time base chip U15B are externally connected to the pulse adjustment circuit. The 7th pin of the current sensor is electrically connected to the 6th pin of the time base chip U15A. The 5th pin of the time base chip U15A is electrically connected to the 10th pin of the time base chip U15B. The pulse adjustment circuit includes a resistor R47, a resistor R95 and a capacitor C49. The resistor R47 and the resistor R95 are connected in series, and one end of the resistor R47, the resistor R95 and the capacitor C49 are respectively connected to the 18th, 12th and 11th pins of the time base chip U15B. and 11 pins, pin 2 of the bridge rectifier is connected to a 220V incandescent lamp, pin 3 of the bridge rectifier is connected to pins 3 and 4 of the current sensor, pin B of the transistor TR1 is connected in series with a resistor R19 and pin 9 of the timing chip U15B, and pin E of the transistor TR1 is grounded, pin C of the transistor TR1 is connected in series with a diode D8 and is electrically connected to an optocoupler, pin B of the transistor TR2 is connected in series with a resistor R20 and pin 5 of the timing chip U15A, and pin E of the transistor TR2 is grounded, and pin C of the transistor TR2 is connected in series with pin 6 of the timing chip U15A. The B pin of the transistor TR2 is connected in series with a diode D16 and is electrically connected to pin 9 of the timing chip U15B. The G pin of the IGBT tube Q1 is connected in series with a resistor R137 and is electrically connected to an optocoupler. The S pin of the IGBT tube Q1 is respectively connected in parallel with a diode TVS1 and a capacitor C28, and the D pin of the IGBT tube Q1 is connected in series with a resistor R55 and is electrically connected to pins 1 and 2 of the current sensor. A diode is connected between the S pin of the IGBT tube Q1 and the D pin of the IGBT tube Q1. The light-emitting diode and the resistor R42 are connected in series and are electrically connected to pin 5 of the timing chip U15A.
2. The control method for solving the problem of cold resistance affecting the protection circuit of the navigation light controller according to claim 1 is characterized in that: The following steps are involved: Step 1: Turn on the power and light up the 220V incandescent lamp; Step 2: Set the parameters of resistor R47, resistor R95 and capacitor C49, and set the on-time of the pulse signal to 20 and 30uS, and the flip cycle to 20 and 30mS; Step 3: When the signal O1 is at a low level, the optocoupler P6 is turned on, GATE1 is at a high level, and the current flowing through the 220V incandescent lamp passes through the current sensor to collect the sensing signal, and then the sensing voltage signal ADC0 is sent to the 6th pin of the time base chip U15A; Step 4: When the impact current is large and the induced voltage signal ADC0 is small, the 5th pin of the timing chip U15A outputs a high level and is sent to the 10th pin of the timing chip U15B; Step 5: When the 10th pin of the timing chip U15B receives a high-level signal, it will enter a high-duty-cycle multivibrator state. The 9th pin of the timing chip U15B will continuously output a high level, so that the transistor TR1 is turned on, and the optocoupler P6 is turned on, so that the filament is continuously heated until the filament resistance increases to a critical value, which plays a protective role. Step 6: When the impact current is small, the induced voltage signal ADC0 is large, and the 5th pin of the timing chip U15A outputs a low level and is sent to the 10th pin of the timing chip U15B; Step 7: After receiving a low level, the internal pin 10 of the timing chip U15B is automatically reset. The pin 9 of the timing chip U15B outputs a low level, and the transistor TR1 will not be turned on. The optocoupler P6 is always turned on, GATE1 is a high level, and the 220V incandescent lamp works normally.
Citation Information
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