CN115209592A

CN115209592A - Navigation aid lamp system capable of fault open circuit detection and detection method

Info

Publication number: CN115209592A
Application number: CN202210957800.7A
Authority: CN
Inventors: 吴光烈; 沈家钦; 陈建强
Original assignee: Airsafe Airport Equipment Co ltd
Current assignee: Airsafe Airport Equipment Co ltd
Priority date: 2022-08-10
Filing date: 2022-08-10
Publication date: 2022-10-18

Abstract

The application relates to a navigation aid lamp system capable of fault open circuit detection and a detection method, wherein the navigation aid lamp system comprises a constant current source for providing constant current; the input end of the over-current protection branch is connected with the constant current source, a first enabling end used for acquiring a switch control signal is arranged on the over-current protection branch, and the over-current protection branch is normally on, can be subjected to open circuit based on the switch control signal and can be also subjected to open circuit based on the passing current and the power-on duration; the input end of the shunt branch is connected with the constant current source, a second enabling end used for acquiring a switch control signal is arranged on the shunt branch, and the shunt branch is normally off and can be switched on based on the switch control signal; the driving module is used for controlling the electric energy output of the LED lamp and sending a switch control signal; and the LED lamp is connected to the output end of the driving module. According to the LED lamp driving system, the open circuit can be provided when any one of the driving system or the LED lamp breaks down under the condition that the driving system breaks down, and the risk caused by a detection blind area is avoided.

Description

Navigation aid lamp system capable of detecting open circuit caused by fault and detection method

Technical Field

The application relates to the field of illumination, in particular to a navigation aid lamp system capable of fault open circuit detection and a detection method.

Background

At present, a navigation aid lamp is a plurality of lamps arranged in sequence on a channel, and in order to avoid the problem that the brightness of the lamps is high before and low after long-distance power supply, a current power supply system of the navigation aid lamp generally adopts a constant current source system.

The early navigational lights adopt halogen light sources, and show open circuits after the light sources are in failure, and because the power supply system adopts the constant current source, if the light sources show open circuits, very high voltage can be generated, and then whether the lamp fails or not can be known by detecting the voltage. Most of the existing navigation lights are upgraded from halogen light sources to LED light sources, but because the LED light sources are not matched with a constant current source system of an airport, a set of driving system is required to be equipped to convert input electric energy into electric energy matched with the LED light sources.

In order to simulate an open circuit detection method of a halogen lamp to detect a fault of an LED light source, an open circuit module is usually developed in a current driving system, and when the open circuit module detects that the LED light source has a fault, the open circuit module is controlled to operate by an internal CPU. However, such a scheme has the following careless omission, and if the driving system itself has a fault, the fault of the LED light source cannot be detected, so that the CPU cannot control the open-circuit module to provide an open circuit, thereby causing a hidden danger.

In view of the above situation, the application provides a navigation aid lamp system capable of performing open circuit fault detection and a detection method thereof, so as to solve the problem that an open circuit module cannot provide an open circuit when a driving system fails.

Disclosure of Invention

In order to solve the problem that an open circuit module cannot provide an open circuit when a driving system fails, the application provides a navigation aid lamp system capable of detecting the open circuit due to failure and a detection method.

In a first aspect, the application provides a navaid lamp system capable of detecting open circuit due to faults, which adopts the following technical scheme:

a navigational light system capable of open circuit failure detection, comprising:

the constant current source is used for providing constant current;

the overcurrent protection branch circuit is normally open, can be broken based on the switch control signal, and can also be broken based on the passing current and the energization time;

the input end of the shunt branch is connected with the constant current source, a second enabling end used for acquiring a switch control signal is arranged on the shunt branch, and the shunt branch is normally off and can be switched on based on the switch control signal;

the input end of the modulation module is simultaneously connected with the output end of the overcurrent protection branch circuit and the output end of the shunt branch circuit, the modulation module controls electric energy output based on the modulation control signal and generates a second detection signal based on the output current;

the control module is connected to the modulation module and outputs a modulation control signal, and the control module sends out a switch control signal based on the second detection signal;

the LED lamp is connected to the output end of the driving module and works based on the electric energy output by the driving module;

the output voltage of the constant current source changes based on the on-off state of the driving module and the LED lamp.

By adopting the technical scheme, when the LED lamp, the modulation module and the control module all work, constant current source input constant current, the overcurrent protection branch is in a conducting state, the shunt branch is in a disconnecting state, the modulation module detects self output electric energy, a second detection signal of high level is generated and sent to the control module based on a detection result, the control module sends a switch control signal of high level based on the received second detection signal of high level, a second enabling end on the shunt branch receives the switch control signal of high level to enable the shunt branch to be conducted, and the overcurrent protection branch is disconnected.

When the LED lamp breaks down in the starting process, constant current is input by the constant current source, the overcurrent protection branch circuit is in a conducting state, the shunt branch circuit is in a disconnected state, the modulation module detects self output electric energy, a second detection signal with low level is generated and sent to the control module based on the detection result, the control module sends out a switch control signal with low level based on the second detection signal with low level, a first enabling end on the overcurrent protection branch circuit receives the switch control signal with low level, the overcurrent protection branch circuit is continuously conducted and disconnected based on the current passing size and the power-on duration, and the shunt branch circuit keeps in the disconnected state.

When the LED lamp breaks down in the using process, constant current is input by the constant current source, the shunt branch circuit is conducted, the modulation module detects self output electric energy, a second detection signal sent to the control module is changed from a high level to a low level, the control module detects the second detection signal of the low level and sends a switch control signal of the low level, a first enabling end on the overcurrent protection branch circuit receives the switch control signal of the low level, the overcurrent protection branch circuit is conducted and is disconnected based on the current passing size and the power-on duration, and similarly, the shunt branch circuit is disconnected.

When the modulation module fails in the starting process, the constant current source inputs constant current, the overcurrent protection branch is switched on, the shunt branch is switched off, the modulation module sends a low-level second detection signal due to a fault or cannot send the second detection signal due to the fault, and the control module receives a low-level second detection signal sent by a mistake or cannot receive the second detection signal, so that the control module sends a low-level switch control signal or a non-sent switch control signal, and two conditions occur, namely, the first enabling end of the overcurrent protection branch is switched on after receiving the low-level switch control signal, or the first enabling end and the second enabling end cannot receive the switch control signal, so that the overcurrent protection branch is continuously switched on and is switched off based on the current passing size and the power-on duration, and similarly, the shunt branch is continuously switched off.

When the modulation module fails in the using process, the constant current source inputs constant current, the shunt branch is switched on, the overcurrent protection branch is switched off, a second detection signal sent by the modulation module due to a fault is changed from a high level to a low level or cannot send the second detection signal, so that the control module receives a low-level second detection signal sent by mistake or cannot receive the second detection signal, and the control module sends a low-level switch control signal or a switch control signal not sent, and then two situations occur, namely, a first enabling end of the overcurrent protection branch is switched on after receiving the low-level switch control signal, or the first enabling end and a second enabling end cannot receive the switch control signal, so that the normally-on overcurrent protection branch is switched on and is switched off based on the current and the power-on duration, and similarly, the shunt branch is switched off.

When the control module fails in the starting process, the constant current source inputs constant current, the overcurrent protection branch circuit is switched on, the shunt branch circuit is switched off, the modulation module can send a high-level second detection signal, but at the moment, the control module sends a low-level switch control signal or a switch control signal which cannot be sent due to failure, and then two situations occur, namely, the first enabling end of the overcurrent protection branch circuit is switched on after receiving the low-level switch control signal, or the first enabling end and the second enabling end cannot receive the switch control signal, so that the overcurrent protection branch circuit is continuously switched on and is switched off based on the current passing size and the power-on time, and similarly, the shunt branch circuit is continuously switched off.

When the control module breaks down in the using process, constant current is input by the constant current source, the shunt branch is connected, the overcurrent protection branch is disconnected, the modulation module can send a high-level second detection signal, the control module sends a low-level switch control signal or a switch control signal which cannot be sent due to the fault, and then two conditions occur, namely, the first enabling end of the overcurrent protection branch is connected after receiving the low-level switch control signal, or the first enabling end and the second enabling end cannot receive the switch control signal, so that the normally-connected overcurrent protection branch is connected and disconnected based on the current passing size and the power-on time, and similarly, the shunt branch is disconnected.

In summary, when the LED lamp fails, the control module controls the overcurrent protection branch to be turned on to provide an open circuit because the overcurrent protection branch can be turned off based on the magnitude of the passing current and the duration of the power-on; when modulation module or control module broke down, because the overcurrent protection branch road is normal open, control module can't send the switch control signal of control overcurrent protection branch road disconnection, also can provide and open a way, consequently this application has realized that when the equipment that detects the LED trouble condition goes wrong and causes CPU can't control the module of opening a way and provide and open a way, though can't detect the trouble condition of LED lamp or can't send control signal, still can provide and open a way when arbitrary one breaks down in modulation module, control module or the LED lamp, the risk that potential detection blind area brought has been avoided.

Optionally, the overcurrent protection branch comprises a thermal fuse tube, and the thermal fuse tube is fused when the temperature rises to exceed a rated temperature.

By adopting the technical scheme, after the overcurrent protection branch is conducted for a period of time, the temperature of the thermal fuse tube continuously rises, and when the temperature rises to exceed the rated temperature, the fuse in the thermal fuse tube is fused, so that the on-state of the overcurrent protection branch at which the thermal fuse tube is positioned is changed into the off-state.

Optionally, a first switch is disposed on the overcurrent protection branch, and the first switch is formed with the first enable end for obtaining a switch control signal.

Optionally, a second switch is disposed on the shunt branch, and a second enable end for obtaining a switch control signal is formed on the second switch.

By adopting the technical scheme, the first enabling end and the second enabling end are both ports for receiving the switch control signal, when neither the first enabling end nor the second enabling end receives the switch control signal, the first switch keeps a closed state, and the second switch keeps an open state; when the switch control signal is at a low level, the first enabling end controls the first switch to be closed so that the overcurrent protection branch circuit is conducted and is disconnected based on the passing current and the electrifying duration, and the second enabling end controls the second switch to be disconnected so that the shunt branch circuit is disconnected; when the switch control signal is at a high level, the first enabling end controls the first switch to be disconnected so that the shunt branch circuit is connected, and the second enabling end controls the second switch to be closed so that the overcurrent protection branch circuit is disconnected.

Optionally, still include the relay, the relay connect in on the control module, the relay includes relay coil and single-pole double-throw switch, overcurrent protection branch road is kept away from the one end of constant current source is formed with the first contact of single-pole double-throw switch, the reposition of redundant personnel branch road is kept away from the one end of constant current source is formed with the second contact of single-pole double-throw switch, relay coil circles to set up and is used for controlling the enabling end that self switched on and off, the enabling end does simultaneously first enabling end and second enabling end, relay coil is based on the control of switch control signal single-pole double-throw switch switches.

By adopting the technical scheme, after the switch control signal is sent to the enabling end of the relay coil, the relay coil controls the single-pole double-throw switch to switch based on the condition of the switch control signal, and then the on-off of the overcurrent protection branch and the shunt branch is controlled.

Specifically, when the LED lamp, the control module and the modulation module work, the relay is electrified, the enable end receives a high-level switch control signal, the relay coil controls the single-pole double-throw switch to be switched from the first contact to the second contact, the shunt branch is connected, and the overcurrent protection branch is disconnected; when the LED lamp breaks down, the relay is electrified, the enable end receives a low-level switch control signal, the relay coil controls the single-pole double-throw switch to be switched from the second contact to the first contact, the overcurrent protection branch is switched on and is switched off based on the passing current and the electrified duration, and the shunt branch is switched off; when the modulation module breaks down, the relay is electrified, the enable end receives a low-level switch control signal, the relay coil controls the single-pole double-throw switch to be switched from the second contact to the first contact, the overcurrent protection branch is switched on and is switched off based on the passing current and the electrifying time, and the shunt branch is switched off at the same time; when the control module breaks down, the relay loses power, the relay coil cannot control the single-pole double-throw switch, so that the normally-on over-current protection branch is switched on and is switched off based on the passing current and the power-on duration, and the normally-off shunt branch is switched off.

Optionally, the modulation module includes:

a modulation unit that controls an electric power output based on a modulation control signal;

a detection unit that generates a second detection signal based on a current output by itself.

Through adopting above-mentioned technical scheme, because the constant current source system at LED lamp and airport does not match, therefore need be equipped with the electric energy conversion that the modulation unit will input and become the electric energy with LED lamp looks adaptation, when the electric energy after the modulation unit will convert is carried to the LED lamp, detecting element will detect above-mentioned electric energy and generate the second detected signal, the second detected signal will be sent to the control unit and be used for the analysis LED lamp whether break down.

Optionally, the modulation module and the control module cooperate to form a driving module, and the driving module is configured to control output of electric energy to the LED lamp and send a switch control signal.

Optionally, the system further comprises an output detection module, wherein the output detection module is used for detecting the output voltage of the constant current source and outputting a first detection signal, and the first detection signal is used for providing the change condition of the output voltage of the constant current source acquired by the master control system.

By adopting the technical scheme, the first detection signal is sent to the main control system and used for analyzing whether the LED lamp fails or whether the modulation module fails or not, and because the LED lamp and the driving module have different resistance values and are connected in parallel, the current input by the constant current source is kept constant, so that when any one of the LED lamp or the driving module fails and is disconnected, the output voltage of the constant current source can be changed differently, and the position of the failure can be judged by judging the voltage change condition through the first detection signal; when a short circuit occurs, the voltage at the output end of the constant current source is reduced to 0V, so that the condition can be judged through the first detection signal.

In a second aspect, the application provides a method for detecting a fault open circuit of a navigation aid lamp, which adopts the following technical scheme:

a navigation aid lamp fault open circuit detection method comprises the following steps:

providing a constant current source for inputting constant current, wherein the constant current is used for providing electric energy for a modulation module, the modulation module is used for controlling the output of the electric energy, and the power output end of the modulation module is electrically connected with an LED lamp;

an overcurrent protection branch and an overcurrent protection branch which are connected in parallel are arranged and used as a connecting channel from a constant current source to a modulation module, wherein a shunt branch is normally broken; the overcurrent protection branch circuit is normally on and can be disconnected based on the passing current and the power-on time;

the control module is arranged, when the control module detects that the modulation module outputs electric energy to the LED lamp, the shunt branch is controlled to be conducted, and the overcurrent protection branch is disconnected;

when the LED lamp, the modulation module and the control module work, the constant current source inputs constant current, the overcurrent protection branch circuit is conducted, the modulation module detects self output electric energy and sends a high-level second detection signal to the control module, the control module sends a high-level switch control signal based on the high-level second detection signal to control the shunt branch circuit to be conducted, and the overcurrent protection branch circuit is disconnected;

when the LED lamp breaks down in the starting process, constant current is input by the constant current source, the overcurrent protection branch circuit is switched on, a second detection signal sent by the modulation module is at a low level, the control module sends a low-level switch control signal based on the low-level second detection signal, the overcurrent protection branch circuit is kept switched on and is switched off based on the current and the power-on duration, and the shunt branch circuit is switched off;

when the LED lamp fails in the using process, constant current is input by the constant current source, the shunt branch is conducted, a second detection signal sent by the modulation module is changed from a high level to a low level, the control module detects the second detection signal of the low level and sends a switch control signal of the low level, the overcurrent protection branch is controlled to be conducted, and the shunt branch is disconnected based on the passing current and the power-on duration;

when the modulation module breaks down in the starting process, constant current is input by the constant current source, the overcurrent protection branch is conducted, the modulation module sends a low-level second detection signal or does not send the second detection signal, the control module sends a low-level switch control signal or does not send the switch control signal, the overcurrent protection branch is continuously conducted and is disconnected based on the passing current and the power-on duration, and the shunt branch is continuously disconnected;

when the modulation module breaks down in the using process, the constant current source inputs constant current, the shunt branch is conducted, a second detection signal sent by the modulation module is changed from a high level to a low level or does not send the second detection signal, and the control module sends a low-level switch control signal or a non-sending switch control signal, so that the overcurrent protection branch is conducted, and is disconnected based on the passing current and the electrifying duration, and the shunt branch is disconnected;

when the control module fails in the starting process, constant current is input by the constant current source, the overcurrent protection branch is conducted, the modulation module sends a high-level second detection signal, the control module sends a low-level switch control signal or a non-sent switch control signal, the overcurrent protection branch is continuously conducted and is disconnected based on the passing current and the electrifying time length, and the shunt branch is continuously disconnected;

when the control module fails in the using process, the constant current source inputs constant current, the shunt branch is switched on, the modulation module sends a high-level second detection signal, and the control module sends a low-level switch control signal or a non-sent switch control signal, so that the overcurrent protection branch is continuously switched on and is disconnected based on the current passing size and the power-on duration, and the shunt branch is continuously disconnected.

In summary, the present application includes at least one of the following beneficial technical effects:

1. the LED lamp driving circuit has the advantages that under the condition that the fault condition of the LED lamp cannot be detected or the condition that the control signal cannot be sent, an open circuit can be provided when any one of the driving system or the LED lamp fails, and the risk caused by a potential detection blind area is avoided.

2. The first detection signal is sent to the master control system, whether the LED lamp fault exists or whether the modulation module and the control module have faults can be obtained through analysis, and maintenance is facilitated.

Drawings

Fig. 1 is a connection diagram of a navigation light system capable of detecting open circuit failure in an embodiment of the present application.

Fig. 2 is a circuit diagram of a navigation light system capable of detecting open circuit failure in an embodiment of the present application.

Description of reference numerals:

1. a constant current source; 2. an overcurrent protection branch circuit; 21. a thermal fuse tube; 3. a shunt branch; 4. a drive module; 41. a modulation module; 42. a control module; 5. an output detection module; 6. a relay; 61. a relay coil; 62. a single pole double throw switch; 621. a first contact; 622. a second contact; 7. an LED lamp.

Detailed Description

The present application will be described in further detail below with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are merely illustrative of the present application and are not intended to limit the present application.

In the following description, for purposes of explanation, numerous specific details are set forth in order to provide a thorough understanding of the inventive concepts. Some of the figures in the present disclosure show structures and devices in block diagram form as part of this specification to avoid obscuring the disclosed principles. In the interest of clarity, not all features of an actual implementation are described in this specification. Reference in the present disclosure to "one implementation" or "an implementation" means that a particular feature, structure, or characteristic described in connection with the implementation is included in at least one implementation, and references to "one implementation" or "an implementation" are not to be understood as necessarily all referring to the same implementation.

Unless explicitly defined otherwise, the terms "a," "an," and "the" are not intended to refer to a singular entity, but include the general class of which a particular example may be used for illustration. Thus, use of the terms "a" or "an" can mean any number of at least one, including "a," one or more, "" at least one, "and" one or more than one. The term "or" means any of the alternatives, and any combination of alternatives, including all alternatives, unless the alternatives are explicitly indicated as mutually exclusive. The phrase "at least one of," when combined with a list of items, refers to a single item in the list or any combination of items in the list. The phrase does not require all of the listed items unless explicitly so limited.

The embodiment of the application discloses aid to navigation lamps and lanterns system that can carry out trouble open circuit and detect. Referring to fig. 1, a navigation aid lamp system capable of detecting open circuit failure includes a constant current source 1, an overcurrent protection branch 2, a shunt branch 3, a driving module 4 and an LED lamp 7, the constant current source 1 is used for providing constant current, whether the output voltage of the constant current source 1 changes based on the on-off of the driving module 4 and the LED lamp 7, the input end of the overcurrent protection branch 2 is connected to the constant current source 1, a first enabling end for obtaining a switch control signal is provided on the overcurrent protection branch 2, the overcurrent protection branch 2 is normally on, open circuit can occur based on the switch control signal, open circuit can be further based on the current magnitude and the power on duration, the input end of the shunt branch 3 is connected to the constant current source 1, a second enabling end for obtaining the switch control signal is provided on the shunt branch 3, the shunt branch 3 is normally off, and open circuit can be based on the switch control signal. The driving module 4 is used for controlling the electric energy output to the LED lamp 7 and sending out a switch control signal, the driving module 4 includes a modulation module 41 and a control module 42, specifically, the input end of the modulation module 41 is connected to the output end of the overcurrent protection branch 2 and the output end of the shunt branch 3 at the same time, the modulation module 41 controls the electric energy output based on the modulation control signal and generates a second detection signal based on the output current, the control module 42 is connected to the modulation module 41 and outputs the modulation control signal, the control module 42 sends out the switch control signal based on the second detection signal, the LED lamp 7 is connected to the output end of the driving module 4 and works based on the electric energy output by the driving module 4.

When the LED lamp 7, the modulation module 41 and the control module 42 all work, the constant current source 1 inputs a constant current, the overcurrent protection branch 2 is in a conducting state, the shunt branch 3 is in a disconnecting state, the modulation module 41 detects the output electric energy of itself, and generates and sends a high-level second detection signal to the control module 42 based on the detection result, the control module 42 sends a high-level switch control signal based on the received high-level second detection signal, the second enable terminal on the shunt branch 3 receives the high-level switch control signal to enable the shunt branch 3 to be conducting, and the overcurrent protection branch 2 is disconnected;

when the LED lamp 7 has a fault in the starting process, the constant current source 1 inputs a constant current, the overcurrent protection branch 2 is in a conducting state, the shunt branch 3 is in a disconnecting state, the modulation module 41 detects its output electric energy, and generates and sends a low-level second detection signal to the control module 42 based on the detection result, the control module 42 sends a low-level switch control signal based on the low-level second detection signal, the first enable terminal on the overcurrent protection branch 2 receives the low-level switch control signal, so that the overcurrent protection branch 2 is continuously conducted and disconnected based on the magnitude of the current and the duration of the power-on, and the shunt branch 3 keeps in the disconnecting state;

when the LED lamp 7 has a fault in the use process, the constant current source 1 inputs a constant current, the shunt branch 3 is turned on, the modulation module 41 detects its output power, the second detection signal sent to the control module 42 is changed from a high level to a low level, the control module 42 detects the second detection signal of the low level and sends a switch control signal of the low level, the first enable terminal on the overcurrent protection branch 2 receives the switch control signal of the low level to turn on the overcurrent protection branch 2 and turn off the overcurrent protection branch based on the current passing magnitude and the energization duration, and similarly, the shunt branch 3 is turned off;

when the modulation module 41 fails in the starting process, the constant current source 1 inputs a constant current, the overcurrent protection branch 2 is turned on, the shunt branch 3 is turned off, and the modulation module 41 sends a low-level second detection signal due to a failure or cannot send a second detection signal due to a failure, so that the control module 42 receives a low-level second detection signal sent by mistake or cannot receive the second detection signal, and therefore, the control module 42 sends a low-level switch control signal or a non-sent switch control signal, and two situations occur, that is, the overcurrent protection branch 2 is turned on continuously because the first enable end of the overcurrent protection branch 2 receives the low-level switch control signal, or the overcurrent protection branch 2 is turned on continuously because the first enable end and the second enable end cannot receive the switch control signal, and similarly, the shunt branch 3 is turned off continuously;

when the modulation module 41 fails in the use process, the constant current source 1 inputs a constant current, the shunt branch 3 is turned on, the overcurrent protection branch 2 is turned off, the modulation module 41 changes a second detection signal from a high level to a low level or cannot send the second detection signal due to a failure, so that the control module 42 receives a low-level second detection signal sent by mistake or cannot receive the second detection signal, and the control module 42 sends a low-level switch control signal or a non-sent switch control signal, so that two situations occur, namely, the first enable end of the overcurrent protection branch 2 is turned on when receiving the low-level switch control signal, or the first enable end and the second enable end cannot receive the switch control signal, so that the normally-on overcurrent protection branch 2 is turned on and is turned off based on the magnitude of the passing current and the duration of the passing current, and similarly, the shunt branch 3 is turned off;

when the control module 42 fails in the starting process, the constant current source 1 inputs a constant current, the overcurrent protection branch 2 is turned on, the shunt branch 3 is turned off, and the modulation module 41 can send a second detection signal at a high level, but at this time, the control module 42 sends a switch control signal at a low level or a switch control signal which cannot be sent due to a failure, so that two situations occur, that is, the first enable end of the overcurrent protection branch 2 receives the switch control signal at the low level and is turned on, or the first enable end and the second enable end cannot receive the switch control signal, so that the overcurrent protection branch 2 is continuously turned on and is turned off based on the current magnitude and the power-on duration, and similarly, the shunt branch 3 is continuously turned off;

when the control module 42 fails in the using process, the constant current source 1 inputs a constant current, the shunt branch 3 is connected, the overcurrent protection branch 2 is disconnected, the modulation module 41 can send a high-level second detection signal, the control module 42 sends a low-level switch control signal or a switch control signal which cannot be sent due to a failure, and then two situations occur, namely, the first enabling end of the overcurrent protection branch 2 is connected after receiving the low-level switch control signal, or the first enabling end and the second enabling end cannot receive the switch control signal, so that the normally-on overcurrent protection branch 2 is connected and disconnected based on the current passing size and the power-on duration, and similarly, the shunt branch 3 is disconnected.

Therefore, when the LED lamp 7 fails, the control module 42 controls the overcurrent protection branch 2 to be turned on to provide an open circuit because the overcurrent protection branch 2 can be turned off based on the passing current and the energization time; when the modulation module 41 or the control module 42 fails, because the overcurrent protection branch 2 is normally open, the control module 42 cannot send a switch control signal for controlling the overcurrent protection branch 2 to be disconnected, and can also provide an open circuit, so that the application realizes that when the equipment for detecting the LED fault condition fails and causes the CPU to fail to control the open circuit module to provide an open circuit, although the fault condition of the LED lamp 7 cannot be detected or the control signal cannot be sent, the open circuit can be provided when any one of the modulation module 41, the control module 42 or the LED lamp 7 fails, thereby avoiding the risk brought by a potential detection blind area

In different embodiments, the overcurrent protection branch 2 can be opened in different ways to ensure the circuit safety, and as an example, the overcurrent protection branch 2 includes a thermal fuse 21, and the thermal fuse 21 can be blown when the temperature rises to exceed the rated temperature. When the overcurrent protection branch 2 is conducted for a period of time, the temperature of the thermal fuse 21 will continuously rise, and when the temperature rises to exceed the rated temperature, the fuse in the thermal fuse 21 will be fused, so that the overcurrent protection branch 2 where the thermal fuse 21 is located is changed from a conducting state to an open-circuit state.

In different embodiments, the on/off of the overcurrent protection branch 2 and the shunt branch 3 can be implemented in different ways, and the following scheme is provided in the present application specifically but not by way of limitation: a first switch is arranged on the overcurrent protection branch 2, and a first enabling end for acquiring a switch control signal is formed on the first switch; a second switch is arranged on the shunt branch 3, and a second enabling end for acquiring a switch control signal is formed on the second switch. The first enabling end and the second enabling end are both ports for receiving switch control signals, when the first enabling end and the second enabling end do not receive the switch control signals, the first switch is kept in a closed state, and the second switch is kept in an open state; when the switch control signal is at a low level, the first enabling end controls the first switch to be closed, so that the overcurrent protection branch 2 is switched on and is switched off based on the passing current and the power-on duration, and the second enabling end controls the second switch to be switched off, so that the shunt branch 3 is switched off; when the switch control signal is at a high level, the first enable terminal controls the first switch to be turned off so as to turn on the shunt branch 3, and the second enable terminal controls the second switch to be turned on so as to turn off the overcurrent protection branch 2.

In addition, the present application provides, in particular but not exclusively, another solution: the navigation aid lamp system capable of performing open-circuit fault detection further comprises a relay 6, the relay 6 is connected to the control module 42, the relay 6 comprises a relay coil 61 and a single-pole double-throw switch 62, one end, far away from the constant current source 1, of the overcurrent protection branch 2 is formed with a first contact 621 of the single-pole double-throw switch 62, one end, far away from the constant current source 1, of the shunt branch 3 is formed with a second contact 622 of the single-pole double-throw switch 62, an enabling end is arranged on the relay coil 61 and used for obtaining a switch control signal, and the relay coil 61 controls the single-pole double-throw switch 62 to switch based on the switch control signal. After the switch control signal is sent to the enable end of the relay coil 61, the relay coil 61 controls the single-pole double-throw switch 62 to switch based on the condition of the switch control signal, so as to control the on-off of the overcurrent protection branch 2 and the shunt branch 3.

Specifically, when the LED lamp 7, the control module 42 and the modulation module 41 all work, the relay 6 is powered on, the enable end receives a high-level switch control signal, the relay coil 61 controls the single-pole double-throw switch 62 to be switched from the first contact 621 to the second contact 622, the shunt branch 3 is turned on, and the overcurrent protection branch 2 is turned off; when the LED lamp 7 breaks down, the relay 6 is powered on, the enabling end receives a low-level switch control signal, the relay coil 61 controls the single-pole double-throw switch 62 to be switched from the second contact 622 to the first contact 621, the overcurrent protection branch 2 is switched on and is switched off based on the passing current and the power-on duration, and the shunt branch 3 is switched off; when the modulation module 41 has a fault, the relay 6 is powered on, the enable end receives a low-level switch control signal, the relay coil 61 controls the single-pole double-throw switch 62 to be switched from the second contact 622 to the first contact 621, the overcurrent protection branch 2 is switched on and is switched off based on the passing current and the power-on duration, and the shunt branch 3 is switched off; when the control module 42 fails, the relay 6 loses power, the relay coil 61 cannot control the single-pole double-throw switch 62, so that the overcurrent protection branch 2 in the normally-on state is switched on and is switched off based on the passing current and the power-on time, and the shunt branch 3 in the normally-off state is switched off.

Specifically, the modulation module 41 includes a modulation unit and a detection unit, the modulation unit controls the power output based on the modulation control signal, and the detection unit generates the second detection signal based on the current output by the detection unit. Because LED lamp 7 and the constant current source 1 system in airport do not match, therefore need be equipped with the electric energy conversion that the modulation unit will input and become the electric energy with LED lamp 7 looks adaptation, when the modulation unit is carried the electric energy after will converting to LED lamp 7, detecting element will detect above-mentioned electric energy and generate the second detected signal, and the second detected signal will be sent to the control unit and be used for the analysis LED lamp 7 whether break down.

In order to further judge the specific position of the fault, the present application specifically but not by way of limitation proposes a scheme: the navigation aid lamp system capable of performing open circuit fault detection further comprises an output detection module 5, wherein the output detection module 5 is used for detecting the output voltage of the constant current source 1 and outputting a first detection signal, and the first detection signal is used for providing the change condition of the output voltage of the constant current source 1 acquired by the main control system. Because the resistance values of the LED lamp 7 and the driving module 4 are different and are connected in parallel, and the current input by the constant current source 1 is kept constant, when any one of the LED lamp 7 or the driving module 4 breaks down and is disconnected, the output voltage of the constant current source 1 changes differently, and the position of the fault can be judged by judging the voltage change condition through the first detection signal; when a short circuit occurs, the voltage at the output end of the constant current source 1 will drop to 0V, so that the first detection signal can also be used to judge the situation.

The application also provides a navigation aid lamp fault open circuit detection method, which comprises the following steps:

the constant current source 1 is provided for inputting constant current, wherein the constant current is used for providing electric energy for the modulation module 41, the modulation module 41 is used for controlling the output of the electric energy, and the power output end of the modulation module 41 is electrically connected with the LED lamp 7;

an overcurrent protection branch 2 and an overcurrent protection branch 2 which are connected in parallel are arranged to serve as a connecting channel from the constant current source 1 to the modulation module 41, wherein the shunt branch 3 is normally off; the overcurrent protection branch circuit 2 is normally open and can be opened based on the passing current and the power-on time;

a control module 42 is arranged, when the control module 42 detects that the modulation module 41 outputs electric energy to the LED lamp 7, the shunting branch 3 is controlled to be on, and the overcurrent protection branch 2 is controlled to be off;

when the LED lamp 7, the modulation module 41 and the control module 42 all work, the constant current source 1 inputs a constant current, the overcurrent protection branch 2 is turned on, the modulation module 41 detects its output electric energy and sends a high-level second detection signal to the control module 42, the control module 42 sends a high-level switch control signal based on the high-level second detection signal to control the shunt branch 3 to be turned on, and the overcurrent protection branch 2 is turned off;

when the LED lamp 7 has a fault in the starting process, the constant current source 1 inputs a constant current, the overcurrent protection branch 2 is turned on, the second detection signal sent by the modulation module 41 is at a low level, the control module 42 sends a low-level switch control signal based on the low-level second detection signal, the overcurrent protection branch 2 is kept on, and the shunt branch 3 is turned off based on the current passing magnitude and the energization duration;

when the LED lamp 7 has a fault in the use process, the constant current source 1 inputs a constant current, the shunt branch 3 is turned on, the second detection signal sent by the modulation module 41 changes from a high level to a low level, the control module 42 detects the second detection signal of the low level and sends a switch control signal of the low level, the overcurrent protection branch 2 is controlled to be turned on, and the shunt branch 3 is turned off based on the passing current and the energization duration;

when the modulation module 41 fails in the starting process, the constant current source 1 inputs constant current, the overcurrent protection branch 2 is switched on, the modulation module 41 sends a low-level second detection signal or does not send the second detection signal, the control module 42 sends a low-level switch control signal or does not send the switch control signal, the overcurrent protection branch 2 is continuously switched on and is switched off based on the current and the power-on duration, and the shunt branch 3 is continuously switched off;

when the modulation module 41 fails in the using process, the constant current source 1 inputs a constant current, the shunt branch 3 is switched on, a second detection signal sent by the modulation module 41 is changed from a high level to a low level or does not send the second detection signal, and the control module 42 sends a low-level switch control signal or a non-sending switch control signal, so that the overcurrent protection branch 2 is switched on and is switched off based on the current and the power-on duration, and the shunt branch 3 is switched off;

when the control module 42 fails in the starting process, the constant current source 1 inputs a constant current, the overcurrent protection branch 2 is switched on, the modulation module 41 sends a high-level second detection signal, the control module 42 sends a low-level switch control signal or a non-sent switch control signal, the overcurrent protection branch 2 is continuously switched on and is switched off based on the passing current and the power-on duration, and the shunt branch 3 is continuously switched off;

when the control module 42 fails in the using process, the constant current source 1 inputs a constant current, the shunt branch 3 is turned on, the modulation module 41 sends a high-level second detection signal, and the control module 42 sends a low-level switch control signal or a non-sent switch control signal, so that the overcurrent protection branch 2 is continuously turned on and is turned off based on the current and the energization time, and the shunt branch 3 is continuously turned off.

The above are preferred embodiments of the present application, and the scope of protection of the present application is not limited thereto, so: all equivalent changes made according to the structure, shape and principle of the present application shall be covered by the protection scope of the present application.

Claims

1. A navigational light fixture system capable of open circuit failure detection, comprising:

a constant current source (1) for supplying a constant current;

the overcurrent protection branch circuit (2) is connected with the constant current source (1), a first enabling end used for obtaining a switch control signal is arranged on the overcurrent protection branch circuit (2), and the overcurrent protection branch circuit (2) is normally open, can be broken based on the switch control signal and can be broken based on the current and the power-on time;

the input end of the shunt branch (3) is connected with the constant current source (1), a second enabling end used for obtaining a switch control signal is arranged on the shunt branch (3), and the shunt branch (3) is normally off and can be conducted based on the switch control signal;

the input end of the modulation module (41) is simultaneously connected with the output end of the overcurrent protection branch circuit (2) and the output end of the shunt branch circuit (3), the modulation module (41) controls the output of electric energy based on a modulation control signal, and generates a second detection signal based on the output current;

the control module (42), the control module (42) is connected to the modulation module (41) and outputs a modulation control signal, and the control module (42) sends out a switch control signal based on the second detection signal;

the LED lamp (7) is connected to the output end of the driving module (4) and works based on the electric energy output by the driving module (4);

the output voltage of the constant current source (1) changes based on the on-off of the driving module (4) and the LED lamp (7).

2. Navigational light fixture system capable of open fault detection according to claim 1,

the overcurrent protection branch (2) comprises a thermal fuse (21), and the thermal fuse (21) is fused when the temperature rises to exceed the rated temperature.

3. Navigational light system capable of open fault detection according to claim 1,

the overcurrent protection branch circuit (2) is provided with a first switch, and the first switch is provided with a first enabling end for acquiring a switch control signal.

4. Navigational light system capable of open fault detection according to claim 3,

and a second switch is arranged on the shunting branch (3), and a second enabling end for acquiring a switch control signal is formed on the second switch.

5. Navigational light fixture system capable of open fault detection according to claim 4,

still include relay (6), relay (6) connect in on control module (42), relay (6) are including relay coil (61) and single-pole double-throw switch (62), overcurrent protection branch road (2) are kept away from the one end of constant current source (1) is formed with first contact (621) of single-pole double-throw switch (62), the one end of shunting branch road (3) keeping away from constant current source (1) is formed with second contact (622) of single-pole double-throw switch (62), set up the enable end that is used for controlling self circular telegram on-off on relay coil (61), the enable end be simultaneously first enable end and second enable end, relay coil (61) are based on switch control signal control single-pole double-throw switch (62) switches.

6. Navigational light system enabling open fault detection according to claim 1, characterized in that said modulation module (41) comprises:

a modulation unit that controls power output based on a modulation control signal;

7. Navigational light system capable of open fault detection according to claim 1,

the modulation module (41) is matched with the control module (42) to form a driving module (4), and the driving module (4) is used for controlling the electric energy output of the LED lamp (7) and sending a switch control signal.

8. Navigational light system capable of open fault detection according to claim 7,

still include output detection module (5), output detection module (5) are used for detecting the output voltage of constant current source (1) and output first detected signal, first detected signal is used for the constant current source (1) output voltage situation of change that supplies the major control system to obtain.

9. A navigation aid lamp fault open circuit detection method is characterized by comprising the following steps:

providing a constant current source (1) for inputting a constant current, wherein the constant current is used for providing electric energy for a modulation module (41), the modulation module (41) is used for controlling the output of the electric energy, and the power output end of the modulation module (41) is electrically connected with an LED lamp (7);

an overcurrent protection branch (2) and an overcurrent protection branch (2) which are connected in parallel are arranged and used as a connecting channel from a constant current source (1) to a modulation module (41), wherein a shunt branch (3) is normally broken; the overcurrent protection branch circuit (2) is normally on and can be disconnected based on the passing current and the power-on time;

the control module (42) is arranged, when the control module (42) detects that the modulation module (41) outputs electric energy to the LED lamp (7), the shunt branch circuit (3) is controlled to be conducted, and the overcurrent protection branch circuit (2) is disconnected;

when the LED lamp (7), the modulation module (41) and the control module (42) work, constant current is input into the constant current source (1), the overcurrent protection branch (2) is conducted, the modulation module (41) detects self output electric energy and sends a high-level second detection signal to the control module (42), the control module (42) sends a high-level switch control signal based on the high-level second detection signal to control the shunt branch (3) to be conducted, and the overcurrent protection branch (2) is disconnected;

when the LED lamp (7) breaks down in the starting process, constant current is input by the constant current source (1), the overcurrent protection branch (2) is conducted, a second detection signal sent by the modulation module (41) is at a low level, the control module (42) sends a low-level switch control signal based on the low-level second detection signal, the overcurrent protection branch (2) is maintained to be conducted, the overcurrent protection branch is disconnected based on the current and the power-on duration, and the shunt branch (3) is disconnected;

when the LED lamp (7) breaks down in the using process, constant current is input into the constant current source (1), the shunt branch (3) is conducted, a second detection signal sent by the modulation module (41) is changed from a high level to a low level, the control module (42) detects the second detection signal of the low level and sends a switch control signal of the low level, the overcurrent protection branch (2) is controlled to be conducted, the overcurrent protection branch is disconnected based on the passing current and the power-on duration, and the shunt branch (3) is disconnected;

when the modulation module (41) breaks down in the starting process, constant current is input by the constant current source (1), the overcurrent protection branch (2) is conducted, the modulation module (41) sends a low-level second detection signal or does not send the second detection signal, the control module (42) sends a low-level switch control signal or a non-sending switch control signal, the overcurrent protection branch (2) is continuously conducted and is disconnected based on the passing current and the electrifying time length, and the shunt branch (3) is continuously disconnected;

when the modulation module (41) breaks down in the using process, the constant current source (1) inputs constant current, the shunt branch (3) is conducted, a second detection signal sent by the modulation module (41) is changed from a high level to a low level or does not send the second detection signal, the control module (42) sends a low-level switch control signal or a non-sending switch control signal, so that the overcurrent protection branch (2) is conducted and is disconnected based on the passing current and the electrifying duration, and the shunt branch (3) is disconnected;

when the control module (42) breaks down in the starting process, constant current is input into the constant current source (1), the overcurrent protection branch (2) is conducted, the modulation module (41) sends a high-level second detection signal, the control module (42) sends a low-level switch control signal or a non-sent switch control signal, the overcurrent protection branch (2) is continuously conducted and is disconnected based on the passing current and the electrifying duration, and the shunt branch (3) is continuously disconnected;

when the control module (42) breaks down in the using process, constant current is input into the constant current source (1), the shunt branch (3) is conducted, the modulation module (41) sends out a high-level second detection signal, the control module (42) sends out a low-level switch control signal or a non-sent switch control signal, the overcurrent protection branch (2) is continuously conducted and is disconnected based on the passing current and the electrifying time length, and the shunt branch (3) is continuously disconnected.