CN106809227A - The control system and control method of railroad vehicle and car light - Google Patents
The control system and control method of railroad vehicle and car light Download PDFInfo
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- CN106809227A CN106809227A CN201610838119.5A CN201610838119A CN106809227A CN 106809227 A CN106809227 A CN 106809227A CN 201610838119 A CN201610838119 A CN 201610838119A CN 106809227 A CN106809227 A CN 106809227A
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- car light
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B61—RAILWAYS
- B61D—BODY DETAILS OR KINDS OF RAILWAY VEHICLES
- B61D29/00—Lighting
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Abstract
The invention discloses a kind of railroad vehicle and the control system and control method of car light, the control system includes：Current detection module, current detection module is used for the working current value of real-time detection car light；Acquisition module, acquisition module is used to obtain the current level of illumination of car light, and the target current value of corresponding car light is obtained according to current level of illumination；Control module, control module is connected with current detection module and acquisition module respectively, and control module is used to be controlled car light according to the current differential between the working current value and target current value of car light.The system can determine the target current value of corresponding car light according to current level of illumination, and car light is controlled according to the current differential between working current value and target current value, many grades control of car light can not only be realized, so that illumination more conforms to actual conditions, and closed-loop control can be realized, it is ensured that the accuracy of control.
Description
Technical field
The present invention relates to technical field of vehicle, more particularly to a kind of control system of car light, a kind of having with the system
Rail vehicle, and a kind of control method of car light.
Background technology
At present, vehicle (including automobile, train and tramcar etc.) has become a kind of the most widely used traffic
Focus is not only concentrated on the dynamic property of vehicle, handling by instrument, and with the continuous improvement of vehicle technology level, user
And the aspect such as security, and increasingly pay close attention to the overall performance of vehicle.For example, user has higher to the car light of vehicle
It is required that, it is desirable to the car light of vehicle more conforms to actual user's actual demand.
The content of the invention
It is contemplated that at least solving one of technical problem in correlation technique to a certain extent.
Therefore, it is an object of the present invention to propose a kind of control system of car light, the system can be according to current photograph
Bright grade determines the target current value of corresponding car light, and according to the current differential pair between working current value and target current value
Car light is controlled, and can not only realize many grades control of car light so that illumination more conforms to actual conditions, and can realize
Closed-loop control, it is ensured that the accuracy of control.
It is another object of the present invention to propose a kind of railroad vehicle.
A further object of the present invention is to propose a kind of control method of car light.
To achieve the above object, the control system of a kind of car light that one aspect of the present invention embodiment is proposed, including：Electric current is examined
Module is surveyed, the current detection module is used for the working current value of real-time detection car light；Acquisition module, the acquisition module is used for
The current level of illumination of the car light is obtained, and the target current of the corresponding car light is obtained according to the current level of illumination
Value；Control module, the control module is connected with the current detection module and the acquisition module respectively, the control module
The car light is controlled for the current differential between the working current value according to the car light and the target current value.
The control system of car light according to embodiments of the present invention, by the work electricity of current detection module real-time detection car light
Flow valuve, and the current level of illumination of car light is obtained by acquisition module, and corresponding car light is obtained according to current level of illumination
Target current value, control module carries out according to the current differential between the working current value and target current value of car light to car light
Control.The system can determine the target current value of corresponding car light according to current level of illumination, and according to working current value and
Current differential between target current value is controlled to car light, can not only realize many grades control of car light so that illumination
Actual conditions are more conformed to, and closed-loop control can be realized, it is ensured that the accuracy of control.
According to one embodiment of present invention, working current value and the target of the control module according to the car light
When current differential between current value is controlled to the car light, wherein, if the working current value is more than the target
The absolute value of the current differential between current value and the working current value and the target current value is more than the first default threshold
Value, then the control module turns down the operating current of the car light；If the working current value less than the target current value,
It is described and the absolute value of the current differential between the working current value and the target current value is more than the second predetermined threshold value then
Control module judges that the car light breaks down, and sends alarm；If the working current value is less than target electricity
The absolute value of the current differential between flow valuve and the working current value and the target current value is pre- less than or equal to described second
If threshold value, then the control module heightens the operating current of the car light.
According to one embodiment of present invention, the current detection module includes：Current sampling circuit, the current sample
Circuit is used to for the operating current signal of the car light to be converted to voltage signal；Signal processing circuit, the signal processing circuit
Be connected with the current sampling circuit, the signal processing circuit be used for the voltage signal is processed with obtain with it is described
The corresponding voltage difference of the working current value of car light；Analog to digital conversion circuit, analog-digital conversion circuit as described respectively with the signal
Process circuit is connected with the control module, and analog-digital conversion circuit as described is used to for the voltage difference to be converted to data signal,
So that the control module obtains the working current value of the car light according to the data signal.
According to one embodiment of present invention, the current sampling circuit includes：First to fourth sampling resistor in parallel,
One end of any one sampling resistor is connected with power supply in first to fourth sampling resistor, first to fourth electricity
The other end of any one resistance is connected with the car light in resistance；Amplitude limiter circuit, the amplitude limiter circuit and described first to
Four sampling resistors are in parallel；First electric capacity, first electric capacity is in parallel with the amplitude limiter circuit, and first electric capacity one end
By being grounded after the second electric capacity, the other end of first electric capacity is followed by described by the 3rd electric capacity.
According to one embodiment of present invention, the amplitude limiter circuit includes the first diode and the two or two pole of reverse parallel connection
Pipe.
According to one embodiment of present invention, the signal processing circuit includes：First resistor, the one of the first resistor
End is connected with one end of first electric capacity；The second resistance of series connection and the 4th electric capacity, one end of the second resistance with it is described
The other end of the first electric capacity is connected, and the other end of the second resistance is connected with one end of the 4th electric capacity, the 4th electricity
The other end ground connection of appearance；Operational amplifier, the negative input end of the operational amplifier is connected with the other end of the first resistor,
The negative input end of the operational amplifier is also by defeated with the operational amplifier after 3rd resistor and the 5th electric capacity in parallel
Go out end to be connected, the positive input terminal of the operational amplifier is connected by the 4th resistance with default power supply, the operational amplifier
Output end is connected by the 5th resistance with analog-digital conversion circuit as described.
According to one embodiment of present invention, the level of illumination of the car light includes multiple level of illuminations, wherein, each photograph
The brightness of the corresponding car light of bright grade is different.
To achieve the above object, another aspect of the present invention embodiment proposes a kind of railroad vehicle, and it includes above-mentioned car
The control system of lamp.
Railroad vehicle according to embodiments of the present invention, by the control system of above-mentioned car light, can be according to working as front lit
Grade determines the target current value of corresponding car light, and according to the current differential between working current value and target current value to car
Lamp is controlled, and can not only realize many grades control of car light so that illumination more conforms to actual conditions, and can realize closing
Ring is controlled, it is ensured that the accuracy of control.
To achieve the above object, another aspect of the invention embodiment proposes a kind of control method of car light, including following
Step：The working current value of real-time detection car light；The current level of illumination of the car light is obtained, and according to described when front lit etc.
Level obtains the target current value of the corresponding car light；And the working current value according to the car light and the target current value
Between current differential the car light is controlled.
The control method of car light according to embodiments of the present invention, the working current value of real-time detection car light, and obtain car light
Current level of illumination, and the target current value of corresponding car light is obtained according to current level of illumination, then, according to car light
Current differential between working current value and target current value is controlled to car light.The method can be according to current level of illumination
Determine the target current value of corresponding car light, and car light is entered according to the current differential between working current value and target current value
Row control, can not only realize many grades control of car light so that illumination more conforms to actual conditions, and can realize closed loop control
System, it is ensured that the accuracy of control.
According to one embodiment of present invention, the working current value according to the car light and the target current value it
Between current differential the car light is controlled, including：If the working current value is more than the target current value and institute
The absolute value for stating the current differential between working current value and the target current value is more than the first predetermined threshold value, then turn down described
The operating current of car light；If the working current value is less than the target current value and the working current value and the mesh
The absolute value of the current differential between mark current value is more than the second predetermined threshold value, then judge that the car light breaks down, and send
Alarm；If the working current value is less than the target current value and the working current value and the target current
The absolute value of the current differential between value is less than or equal to second predetermined threshold value, then heighten the operating current of the car light.
According to one embodiment of present invention, the level of illumination of the car light includes multiple level of illuminations, wherein, each photograph
The brightness of the corresponding car light of bright grade is different.
Brief description of the drawings
Fig. 1 is the block diagram of the control system of car light according to embodiments of the present invention；
Fig. 2 is the block diagram of the control system of car light according to an embodiment of the invention；
Fig. 3 is the circuit diagram of current detection module according to an embodiment of the invention；
Fig. 4 is the flow chart of the control method of car light according to embodiments of the present invention；And
Fig. 5 is the block diagram of railroad vehicle according to embodiments of the present invention.
Specific embodiment
Embodiments of the invention are described below in detail, the example of the embodiment is shown in the drawings, wherein from start to finish
Same or similar label represents same or similar element or the element with same or like function.Below with reference to attached
It is exemplary to scheme the embodiment of description, it is intended to for explaining the present invention, and be not considered as limiting the invention.
With reference to the accompanying drawings to describe the control system of the car light of proposition according to embodiments of the present invention, with the control system
Railroad vehicle and car light control method.
Fig. 1 is the block diagram of the control system of car light according to embodiments of the present invention.As shown in figure 1, the car light
Control system may include：Current detection module 10, acquisition module 20 and control module 30.
Wherein, current detection module 10 is used for the working current value of real-time detection car light 40.Acquisition module 20 is used to obtain
The current level of illumination of car light 40, and the target current value of corresponding car light 40 is obtained according to current level of illumination.Control module
30 are connected with current detection module 10 and acquisition module 20 respectively, control module 30 be used for according to the working current value of car light 40 with
Current differential between target current value is controlled to car light 40.
In an embodiment of the present invention, the level of illumination of car light 40 may include multiple level of illuminations, wherein, each illumination etc.
The brightness of the corresponding car light 40 of level is different.
Specifically, car light 40 can be the illuminating lamp in compartment, and its level of illumination can be divided into multiple level of illuminations.Example
Such as, level of illumination can be divided into by multiple level of illuminations according to the time, for example, level of illumination can be divided into according to the time
Two level of illuminations, in summer, in the morning 7:00- evenings 6:In 00 time period, the level of illumination of illuminating lamp is the first illumination
Grade, the brightness of the corresponding illuminating lamp of the level of illumination is relatively low, and at night 6:00- mornings next day 7:In 00 time period, shine
The level of illumination of bright lamp is the second level of illumination, and the brightness of the corresponding illuminating lamp of the level of illumination is higher.
But, it is contemplated that cloudy day on daytime, vehicle process of passing through tunnel on daytime or night vehicle are in very strong place of illumination etc.
When, if dividing level of illumination with the time, the brightness of illuminating lamp may be caused too high or too low, accordingly it is also possible to root
Level of illumination is divided into multiple level of illuminations according to intensity of illumination.For example, level of illumination can be divided into two level of illuminations：First
Level of illumination and the second level of illumination, wherein, the brightness of the first level of illumination is relatively low, institute in compartment when correspondence intensity of illumination is stronger
The visualization normal brightness for needing, the brightness of the second level of illumination is higher, required visual in compartment when correspondence intensity of illumination is relatively low
Change normal brightness.Specifically divide how many level of illuminations and how to divide, can be demarcated according to actual conditions, it is also possible to
Tested by many experiments and obtained, so that the brightness of illuminating lamp more conforms to actual conditions, be not limited here specifically.
It is assumed that current be divided into two level of illuminations according to the time by level of illumination, and current time is evening 10:
30, then the current level of illumination that acquisition module 20 will get interior vehicular illumination lamp according to current time is second illumination etc.
Level, the target current value of corresponding illuminating lamp is the second target current value (larger), and control module 30 is according to the target current value
Corresponding control signal is exported to illuminating lamp, meanwhile, the working current value of the real-time detection illuminating lamp of current detection module 10, control
Module 30 carries out closed-loop control according to the current differential between the working current value and target current value of illuminating lamp to illuminating lamp.
When current time is morning 7:When 00, acquisition module 20 works as front lit by get illuminating lamp according to current time
Grade is the first level of illumination, and now the target current value of corresponding illuminating lamp is first object current value (smaller), controls mould
Block 30 exports corresponding control signal to illuminating lamp according to the target current value, meanwhile, the real-time detection of current detection module 10 is shone
The working current value of bright lamp, control module 30 is according to the current differential pair between the working current value and target current value of illuminating lamp
Illuminating lamp carries out closed-loop control.
Assume again that, level of illumination is currently divided into two level of illuminations according to intensity of illumination, then light can be first passed through
Current vehicle external environment intensity of illumination is obtained according to sensor, then, acquisition module 20 obtains corresponding illumination according to the intensity of illumination
The current level of illumination of lamp.For example, intensity of illumination than it is relatively low when, acquisition module 20 will get the current level of illumination of illuminating lamp
It is the second level of illumination, the target current value of corresponding illuminating lamp is the second target current value (larger), the basis of control module 30
The target current value exports corresponding control signal to illuminating lamp, meanwhile, the work of the real-time detection illuminating lamp of current detection module 10
Make current value, control module 30 is entered according to the current differential between the working current value and target current value of illuminating lamp to illuminating lamp
Row closed-loop control；When intensity of illumination is higher, the current level of illumination that acquisition module 20 will get illuminating lamp is the first illumination
Grade, the target current value of corresponding illuminating lamp is first object current value (smaller), and control module 30 is according to the target current
Value exports corresponding control signal to illuminating lamp, meanwhile, the working current value of the real-time detection illuminating lamp of current detection module 10, control
Molding block 30 carries out closed-loop control according to the current differential between the working current value and target current value of illuminating lamp to illuminating lamp.
Wherein, control module 30 has various to the control mode of car light 40, for example, control module 30 can use PWM
(Pulse Width Modulation, pulse width modulation) mode is controlled to car light 40.
Therefore, the control system of car light according to embodiments of the present invention, can determine corresponding according to current level of illumination
The target current value of car light, and car light is controlled according to the current differential between working current value and target current value, no
Many grades control of car light can only be realized so that illumination more conforms to actual conditions, and can realize closed-loop control, it is ensured that control
The accuracy of system.
According to one embodiment of present invention, control module 30 according to the working current value of car light 40 and target current value it
Between current differential when being controlled to car light 40, wherein, if working current value is more than target current value and working current value
The absolute value of the current differential between target current value is more than the first predetermined threshold value, then control module 30 turns down the work of car light 40
Make electric current；If working current value is less than the current differential between target current value and working current value and target current value
Absolute value is more than the second predetermined threshold value, then control module 30 judges that car light 40 breaks down, and sends alarm；If work
Current value less than current differential between target current value and working current value and target current value absolute value less than or equal to the
Two predetermined threshold values, then control module 30 heighten the operating current of car light.Wherein, the first predetermined threshold value and the second predetermined threshold value can be with
Demarcated according to actual conditions.
Specifically, when the level of illumination of car light 40 switches to the first level of illumination from the second level of illumination, due to second
The target current value of the corresponding car light 40 of level of illumination is more than the target current value of the corresponding car light 40 of the first level of illumination, because
This, in switching, the working current value of car light 40 will be greater than the target current value of car light 40, and control module 30 will control car light 40
Input current reduction so that car light 40 operating current reduction, and then reduce car light 40 brightness.
When the level of illumination of car light 40 switches to the second level of illumination from the first level of illumination, due to the second level of illumination
The target current value of corresponding car light 40 is more than the target current value of the corresponding car light 40 of the first level of illumination, therefore, in switching
When, by less than the target current value of car light 40, control module 30 will control the input electricity of car light 40 to the working current value of car light 40
Stream is raised.But, when the target current value of the working current value less than car light 40 of car light 40, also, the working current value and mesh
The absolute value of the current differential between mark current value is more than the second predetermined threshold value, then illustrate that car light 40 breaks down, control module
30 will send alarm.For example, when car light 40 damages or open circuit fault occurs, the working current value of car light 40 will be 0,
Now working current value is much smaller than target current value, and control module 30 may determine that car light 40 has failure.
Therefore, by the closed-loop control to car light, the real-time regulation to vehicle lamp brightness can not only be realized, and can have
Effect judges whether car light breaks down.
The concrete structure of current detection module in the control system of the car light of the embodiment of the present invention is described in detail below.
According to one embodiment of present invention, as shown in Fig. 2 current detection module 10 may include：Current sampling circuit 11,
Signal processing circuit 12 and analog to digital conversion circuit 13.Wherein, current sampling circuit 11 is used for the operating current signal of car light 40
Voltage signal is converted to, signal processing circuit 12 is connected with current sampling circuit 10, signal processing circuit 12 is used to believe voltage
Number processed to obtain the voltage difference corresponding with the working current value of car light 40.Analog to digital conversion circuit 13 respectively with signal
Process circuit 12 is connected with control module 30, and analog to digital conversion circuit 13 is used to for voltage difference to be converted to data signal, so that control
Molding block 30 obtains the working current value of car light 40 according to data signal.
Specifically, the operating current letter of car light 40 can be obtained by modes such as sampling resistor or current transformers
Number, treatment etc. is then amplified to the operating current signal, analog voltage signal is exported, will be simulated finally by analog-to-digital conversion
Voltage signal is converted to digital voltage signal and sends to control module 30, and control module 30 is calculated according to the digital voltage signal
The working current value of actual car light 40.
According to one embodiment of present invention, as shown in figure 3, current sampling circuit 11 may include：In parallel first is to the
Four sampling resistor RS1, RS2, RS3 and RS4, amplitude limiter circuit U1, the first electric capacity C1, the second electric capacity C2 and the 3rd electric capacity C3.Wherein,
One end of any one sampling resistor is connected with power supply ground GND in first to fourth sampling resistor, in first to fourth resistance
The other end of any one resistance is connected with car light 40.Amplitude limiter circuit U1 is in parallel with first to fourth sampling resistor, the first electricity
Hold C1 it is in parallel with amplitude limiter circuit U1, and the first electric capacity C1 one end by after the second electric capacity C2 ground connection, the first electric capacity C1's is another
One end after the 3rd electric capacity C3 by being grounded.
Wherein, amplitude limiter circuit U1 may include the first diode D1 and the second diode D2 of reverse parallel connection.
Further, as shown in figure 3, signal processing circuit 12 may include：First resistor R1, second resistance R2, the 4th electricity
Hold C4, operational amplifier U2,3rd resistor R3, the 5th electric capacity C5 and the 4th resistance R4.Wherein, one end of first resistor R1 and the
One end of one electric capacity C1 is connected, and second resistance R2 and the 4th electric capacity C4 connects, and one end of second resistance R2 is with the first electric capacity C1's
The other end is connected, and the other end of second resistance R2 is connected with one end of the 4th electric capacity C4, the other end ground connection of the 4th electric capacity C4.Fortune
The negative input end IN- for calculating amplifier U2 is connected with the other end of first resistor R1, and the negative input end IN- of operational amplifier U2 also leads to
It is connected with the output end of operational amplifier U2 after the 3rd resistor R3 and the 5th electric capacity C5 that cross parallel connection, operational amplifier U2's is just defeated
Enter to hold IN+ to be connected with default power supply VCC1 (voltage can be 2.5V) by the 4th resistance R4, the output end of operational amplifier U2
It is connected with the input ADC1 of analog to digital conversion circuit 13 by the 5th resistance R5.
In addition, the positive source of operational amplifier U2 is connected with default power supply VCC2 (voltage can be 3.3V), and also
Voltage stabilizing is carried out by the 6th electric capacity C6 and the 7th electric capacity C7 in parallel, the power cathode of operational amplifier U2 is directly grounded.It is default
Power supply VCC1 can carry out voltage conversion acquisition by voltage stabilizing chip U3 to default power supply VCC2.
Specifically, as shown in figure 3, passing through first to fourth sampling resistor RS1, RS2, RS3 and RS4 real-time sampling car light
Current signal in 40 performance loop, then, the difference amplifier being made up of operational amplifier U2 and other components is obtained
The voltage difference between the voltage and reference voltage of first to fourth sampling resistor RS1, RS2, RS3 and RS4 is obtained, finally, is passed through
Voltage difference is fed back to control module 30 by analog-digital converter.Control module 30 obtains the reality of car light 40 according to the voltage difference
Working current value, and according to the current differential real-time adjustment pwm signal between real work current value and target current value, with right
Car light 40 carries out closed-loop control.
In sum, the control system of car light according to embodiments of the present invention, by current detection module real-time detection car
The working current value of lamp, and the current level of illumination of car light is obtained by acquisition module, and obtained according to current level of illumination
The target current value of corresponding car light, control module is according to the current differential between the working current value and target current value of car light
Car light is controlled.The system can determine the target current value of corresponding car light according to current level of illumination, and according to work
The current differential made between current value and target current value is controlled to car light, can not only realize many grade controls of car light
System so that illumination more conforms to actual conditions, and can realize closed-loop control, it is ensured that the accuracy of control.And, by car
The closed-loop control of lamp, can not only realize the real-time regulation to vehicle lamp brightness, and can effectively judge whether car light occurs
Failure.
Fig. 4 is the flow chart of the control method of car light according to embodiments of the present invention, as shown in figure 4, the control of the car light
Method may include following steps：
S1, the working current value of real-time detection car light.
Specifically, can be by modes such as sampling resistor or current transformers come the operating current of real-time detection car light
Value.
S2, obtains the current level of illumination of car light, and the target current of corresponding car light is obtained according to current level of illumination
Value.
In an embodiment of the present invention, the level of illumination of car light includes multiple level of illuminations, wherein, each level of illumination pair
The brightness of the car light answered is different.
S3, is controlled according to the current differential between the working current value and target current value of car light to car light.
Specifically, car light can be the illuminating lamp in compartment, and its level of illumination can be divided into multiple level of illuminations.For example,
Level of illumination can be divided into by multiple level of illuminations according to the time, for example, level of illumination can be divided into two according to the time
Individual level of illumination, in summer, in the morning 7:00- evenings 6:In 00 time period, the level of illumination of illuminating lamp is first illumination etc.
Level, the brightness of the corresponding illuminating lamp of the level of illumination is relatively low, and at night 6:00- mornings next day 7:In 00 time period, illumination
The level of illumination of lamp is the second level of illumination, and the brightness of the corresponding illuminating lamp of the level of illumination is higher.
But, it is contemplated that cloudy day on daytime, vehicle process of passing through tunnel on daytime or night vehicle are in very strong place of illumination etc.
When, if dividing level of illumination with the time, the brightness of illuminating lamp may be caused too high or too low, accordingly it is also possible to root
Level of illumination is divided into multiple level of illuminations according to intensity of illumination.For example, level of illumination can be divided into two level of illuminations：First
Level of illumination and the second level of illumination, wherein, the brightness of the first level of illumination is relatively low, institute in compartment when correspondence intensity of illumination is stronger
The visualization normal brightness for needing, the brightness of the second level of illumination is higher, required visual in compartment when correspondence intensity of illumination is relatively low
Change normal brightness.Specifically divide how many level of illuminations and how to divide, can be demarcated according to actual conditions, it is also possible to
Tested by many experiments and obtained, so that the brightness of illuminating lamp more conforms to actual conditions, be not limited here specifically.
It is assumed that current be divided into two level of illuminations according to the time by level of illumination, and current time is evening 10:
30, then the current level of illumination that will get interior vehicular illumination lamp according to current time is the second level of illumination, corresponding photograph
The target current value of bright lamp is the second target current value (larger), and controller is according to the corresponding control letter of target current value output
Number to illuminating lamp, meanwhile, the working current value of real-time detection illuminating lamp, working current value and target of the controller according to illuminating lamp
Current differential between current value carries out closed-loop control to illuminating lamp.
When current time is morning 7:When 00, the current level of illumination that will get illuminating lamp according to current time is first
Level of illumination, now the target current value of corresponding illuminating lamp is first object current value (smaller), and controller is according to the target
Current value exports corresponding control signal to illuminating lamp, meanwhile, the working current value of real-time detection illuminating lamp, controller is according to photograph
Current differential between the working current value and target current value of bright lamp carries out closed-loop control to illuminating lamp.
Assume again that, level of illumination is currently divided into two level of illuminations according to intensity of illumination, then light can be first passed through
Current vehicle external environment intensity of illumination is obtained according to sensor, front lit is then worked as according to the corresponding illuminating lamp of intensity of illumination acquisition
Grade.For example, intensity of illumination than it is relatively low when, the current level of illumination of illuminating lamp will be got for the second level of illumination, it is corresponding
The target current value of illuminating lamp is the second target current value (larger), and controller is according to the corresponding control of target current value output
Signal to illuminating lamp, meanwhile, the working current value of real-time detection illuminating lamp, working current value and mesh of the controller according to illuminating lamp
Current differential between mark current value carries out closed-loop control to illuminating lamp；When intensity of illumination is higher, illuminating lamp will be got
Current level of illumination is the first level of illumination, and the target current value of corresponding illuminating lamp is first object current value (smaller), control
Device processed exports corresponding control signal to illuminating lamp according to the target current value, meanwhile, the operating current of real-time detection illuminating lamp
Value, controller carries out closed loop control according to the current differential between the working current value and target current value of illuminating lamp to illuminating lamp
System.
Wherein, controller has various to the control mode of car light, it is for instance possible to use PWM mode is controlled to car light.
Therefore, the control method of car light according to embodiments of the present invention, can determine corresponding according to current level of illumination
The target current value of car light, and car light is controlled according to the current differential between working current value and target current value, no
Many grades control of car light can only be realized so that illumination more conforms to actual conditions, and can realize closed-loop control, it is ensured that control
The accuracy of system.
According to one embodiment of present invention, according to the current differential between the working current value and target current value of car light
Car light is controlled, including：If working current value is more than between target current value and working current value and target current value
Current differential absolute value be more than the first predetermined threshold value, then turn down the operating current of car light；If working current value is less than mesh
The absolute value of mark current value and the current differential between working current value and target current value is more than the second predetermined threshold value, then sentence
Disconnected car light breaks down, and sends alarm；If working current value is less than target current value and working current value and target
The absolute value of the current differential between current value is less than or equal to the second predetermined threshold value, then heighten the operating current of car light.
Specifically, when the level of illumination of car light switches to the first level of illumination from the second level of illumination, due to the second photograph
The target current value of the target current value more than the corresponding car light of the first level of illumination of the corresponding car light of bright grade, therefore, cutting
When changing, the working current value of car light will be greater than the target current value of car light, and controller will control the input current reduction of car light, from
And the operating current reduction of car light is caused, and then reduce the brightness of car light.
When the level of illumination of car light switches to the second level of illumination from the first level of illumination, due to the second level of illumination pair
The target current value of the car light answered is more than the target current value of the corresponding car light of the first level of illumination, therefore, in switching, car light
Working current value will be less than car light target current value, controller will control car light input current raise.But, work as car light
Target current value of the working current value less than car light, also, the current differential between the working current value and target current value
Absolute value be more than the second predetermined threshold value, then illustrate car light break down, controller will send alarm.For example, working as car light
When damaging or open circuit fault occurring, the working current value of car light will be 0, and now working current value is much smaller than target current value,
Controller may determine that car light has failure.
Therefore, by the closed-loop control to car light, the real-time regulation to vehicle lamp brightness can not only be realized, and can have
Effect judges whether car light breaks down.
The control method of car light according to embodiments of the present invention, the working current value of real-time detection car light, and obtain car light
Current level of illumination, and the target current value of corresponding car light is obtained according to current level of illumination, then, according to car light
Current differential between working current value and target current value is controlled to car light.The method can be according to current level of illumination
Determine the target current value of corresponding car light, and car light is entered according to the current differential between working current value and target current value
Row control, can not only realize many grades control of car light so that illumination more conforms to actual conditions, and can realize closed loop control
System, it is ensured that the accuracy of control.And, by the closed-loop control to car light, the real-time tune to vehicle lamp brightness can not only be realized
Section, and can effectively judge whether car light breaks down.
Fig. 5 is the block diagram of railroad vehicle according to embodiments of the present invention.As shown in figure 5, the railroad vehicle 1000
Control system 100 including above-mentioned car light.
Wherein, the control system 100 of car light has above described description in detail, repeats no more here, and above-mentioned car light
Control method can equally be well applied in the railroad vehicle 1000 of the disclosure, specifically also no longer describe in detail here.
Railroad vehicle according to embodiments of the present invention, by the control system of above-mentioned car light, can be according to working as front lit
Grade determines the target current value of corresponding car light, and according to the current differential between working current value and target current value to car
Lamp is controlled, and can not only realize many grades control of car light so that illumination more conforms to actual conditions, and can realize closing
Ring is controlled, it is ensured that the accuracy of control.And, by the closed-loop control to car light, the reality to vehicle lamp brightness can not only be realized
When adjust, and can effectively judge whether car light breaks down.
In the description of the invention, it is to be understood that term " " center ", " longitudinal direction ", " transverse direction ", " length ", " width ",
" thickness ", " on ", D score, "front", "rear", "left", "right", " vertical ", " level ", " top ", " bottom " " interior ", " outward ", " up time
The orientation or position relationship of the instruction such as pin ", " counterclockwise ", " axial direction ", " radial direction ", " circumference " be based on orientation shown in the drawings or
Position relationship, is for only for ease of the description present invention and simplifies description, must rather than the device or element for indicating or imply meaning
With specific orientation, with specific azimuth configuration and operation, therefore must be not considered as limiting the invention.
Additionally, term " first ", " second " are only used for describing purpose, and it is not intended that indicating or implying relative importance
Or the implicit quantity for indicating indicated technical characteristic.Thus, define " first ", the feature of " second " can express or
Implicitly include at least one this feature.In the description of the invention, " multiple " is meant that at least two, such as two, three
It is individual etc., unless otherwise expressly limited specifically.
In the present invention, unless otherwise clearly defined and limited, term " installation ", " connected ", " connection ", " fixation " etc.
Term should be interpreted broadly, for example, it may be fixedly connected, or be detachably connected, or integrally；Can be that machinery connects
Connect, or electrically connect；Can be joined directly together, it is also possible to be indirectly connected to by intermediary, can be in two elements
The connection in portion or two interaction relationships of element, unless otherwise clearly restriction.For one of ordinary skill in the art
For, can as the case may be understand above-mentioned term concrete meaning in the present invention.
In the present invention, unless otherwise clearly defined and limited, fisrt feature second feature " on " or D score can be with
It is the first and second feature directly contacts, or the first and second features are by intermediary mediate contact.And, fisrt feature exists
Second feature " on ", " top " and " above " but fisrt feature are directly over second feature or oblique upper, or be merely representative of
Fisrt feature level height is higher than second feature.Fisrt feature second feature " under ", " lower section " and " below " can be
One feature is immediately below second feature or obliquely downward, or is merely representative of fisrt feature level height less than second feature.
In the description of this specification, reference term " one embodiment ", " some embodiments ", " example ", " specifically show
The description of example " or " some examples " etc. means to combine specific features, structure, material or spy that the embodiment or example are described
Point is contained at least one embodiment of the invention or example.In this manual, to the schematic representation of above-mentioned term not
Identical embodiment or example must be directed to.And, the specific features of description, structure, material or feature can be with office
Combined in an appropriate manner in one or more embodiments or example.Additionally, in the case of not conflicting, the skill of this area
Art personnel can be tied the feature of the different embodiments or example described in this specification and different embodiments or example
Close and combine.Although embodiments of the invention have been shown and described above, it is to be understood that above-described embodiment is example
Property, it is impossible to limitation of the present invention is interpreted as, one of ordinary skill in the art within the scope of the invention can be to above-mentioned
Embodiment is changed, changes, replacing and modification.
Claims (11)
1. a kind of control system of car light, it is characterised in that including：
Current detection module, the current detection module is used for the working current value of real-time detection car light；
Acquisition module, the acquisition module is used to obtain the current level of illumination of the car light, and according to described when front lit etc.
Level obtains the target current value of the corresponding car light；
Control module, the control module is connected with the current detection module and the acquisition module respectively, the control mould
Block is used to control the car light according to the current differential between the working current value and the target current value of the car light
System.
2. the control system of car light as claimed in claim 1, it is characterised in that work of the control module according to the car light
When making the current differential between current value and the target current value car light being controlled, wherein,
If the working current value is more than between the target current value and the working current value and the target current value
Current differential absolute value be more than the first predetermined threshold value, then the control module turn down the operating current of the car light；
If the working current value is less than between the target current value and the working current value and the target current value
Current differential absolute value be more than the second predetermined threshold value, then the control module judges that the car light breaks down, and sends
Alarm；
If the working current value is less than between the target current value and the working current value and the target current value
Current differential absolute value be less than or equal to second predetermined threshold value, then the control module heighten the car light work electricity
Stream.
3. the control system of car light as claimed in claim 1 or 2, it is characterised in that the current detection module includes：
Current sampling circuit, the current sampling circuit is used to for the operating current signal of the car light to be converted to voltage signal；
Signal processing circuit, the signal processing circuit is connected with the current sampling circuit, and the signal processing circuit is used for
The voltage signal is processed to obtain the voltage difference corresponding with the working current value of the car light；
Analog to digital conversion circuit, analog-digital conversion circuit as described is connected with the signal processing circuit and the control module respectively, institute
Analog to digital conversion circuit is stated for the voltage difference to be converted into data signal, so that the control module is according to the numeral letter
Number obtain the working current value of the car light.
4. the control system of car light as claimed in claim 3, it is characterised in that the current sampling circuit includes：
First to fourth sampling resistor in parallel, one end of any one sampling resistor is equal in first to fourth sampling resistor
It is connected with power supply, the other end of any one resistance is connected with the car light in first to fourth resistance；
Amplitude limiter circuit, the amplitude limiter circuit is in parallel with first to fourth sampling resistor；
First electric capacity, first electric capacity is in parallel with the amplitude limiter circuit, and one end of first electric capacity is electric by second
It is grounded after appearance, the other end of first electric capacity is followed by described by the 3rd electric capacity.
5. the control system of car light as claimed in claim 4, it is characterised in that the amplitude limiter circuit includes the of reverse parallel connection
One diode and the second diode.
6. the control system of car light as claimed in claim 4, it is characterised in that the signal processing circuit includes：
First resistor, one end of the first resistor is connected with one end of first electric capacity；
The second resistance of series connection and the 4th electric capacity, one end of the second resistance are connected with the other end of first electric capacity, institute
The other end for stating second resistance is connected with one end of the 4th electric capacity, the other end ground connection of the 4th electric capacity；
Operational amplifier, the negative input end of the operational amplifier is connected with the other end of the first resistor, and the computing is put
The negative input end of big device is also connected by after 3rd resistor and the 5th electric capacity in parallel with the output end of the operational amplifier, institute
The positive input terminal for stating operational amplifier is connected by the 4th resistance with default power supply, and the output end of the operational amplifier is by the
Five resistance are connected with analog-digital conversion circuit as described.
7. the control system of car light as claimed in claim 1, it is characterised in that the level of illumination of the car light includes multiple photograph
Bright grade, wherein, the brightness of the corresponding car light of each level of illumination is different.
8. a kind of railroad vehicle, it is characterised in that the control system including the car light as any one of claim 1-7.
9. a kind of control method of car light, it is characterised in that comprise the following steps：
The working current value of real-time detection car light；
The current level of illumination of the car light is obtained, and the target of the corresponding car light is obtained according to the current level of illumination
Current value；And
The current differential between working current value and the target current value according to the car light is controlled to the car light.
10. the control method of car light as claimed in claim 9, it is characterised in that the operating current according to the car light
Current differential between value and the target current value is controlled to the car light, including：
If the working current value is more than between the target current value and the working current value and the target current value
Current differential absolute value be more than the first predetermined threshold value, then turn down the operating current of the car light；
If the working current value is less than between the target current value and the working current value and the target current value
Current differential absolute value be more than the second predetermined threshold value, then judge that the car light breaks down, and send alarm；
If the working current value is less than between the target current value and the working current value and the target current value
Current differential absolute value be less than or equal to second predetermined threshold value, then heighten the operating current of the car light.
The control method of 11. car light as described in claim 9 or 10, it is characterised in that the level of illumination of the car light includes
Multiple level of illuminations, wherein, the brightness of the corresponding car light of each level of illumination is different.
Priority Applications (1)
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| CN201610838119.5A CN106809227B (en) | 2016-09-21 | 2016-09-21 | The control system and control method of railroad vehicle and car light |
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| CN201610838119.5A CN106809227B (en) | 2016-09-21 | 2016-09-21 | The control system and control method of railroad vehicle and car light |
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| CN113630938A (en) * | 2021-08-09 | 2021-11-09 | 常州青葵智能科技有限公司 | LED car lamp fault online diagnosis method |
| CN114513876A (en) * | 2022-01-28 | 2022-05-17 | 上海康耐司信号设备有限公司 | Multi-light-source car lamp self-adaptive system and method |
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| CN106809227B (en) | 2018-01-23 |
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