CN109839604A - Disconnected core detection circuit and power supply device - Google Patents
Disconnected core detection circuit and power supply device Download PDFInfo
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- CN109839604A CN109839604A CN201711215789.2A CN201711215789A CN109839604A CN 109839604 A CN109839604 A CN 109839604A CN 201711215789 A CN201711215789 A CN 201711215789A CN 109839604 A CN109839604 A CN 109839604A
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Abstract
The present invention relates to disconnected core detection circuit and power supply devices.The present invention provide can not by the size of current or voltage that flow through light source electronic influenced and clearly judge light source whether there is or not disconnected core, and can effectively notify the short message observation circuit and power supply device of the disconnected core of light source.Power supply device (10) has the constant-current circuit (12) for keeping supply constant to the electric current of LED (13), the core if LED (13) breaks, and constant-current circuit (12) output is more than the voltage of pre-determined reference value.Carry out the switch element (25) of switch motion based on the voltage for being more than above-mentioned pre-determined reference value to constant-current circuit (12) additional setting in the inside of power supply device (10).The switching of the circuit state carried out by the switch motion by the switch element (25) is come the disconnected core that detects LED (13).
Description
Technical field
The present invention relates to disconnected core detection circuit and including the disconnected core observation circuit power supply device, the disconnected core detection circuit quilt
It is arranged in into the power supply device of light-emitting component supply electric current for forming mark light source, for detecting the disconnected core of light-emitting component.
Background technique
As existing mark, it is known that for example have disclosed in patent document 1 using halogen bulb as the automobile of light source
Headlamp.This headlamp is to be related to safe important equipment, such as resolute especially in the case where the headlamp of rolling stock
Core then needs to stop the operation of train, it is therefore desirable to detect disconnected core conscientiously and as soon as possible.The detection of disconnected core is not limited to rail truck
Headlamp, for the light source of the other identifiers such as aviation trouble light or traffic lights also will become common project.Cause
This as shown in Figure 7, is supervised at present about incandescent lamp bulbs such as halogen bulb using the disconnected core detection device of resistor types
Depending on the magnitude of current, and disconnected core is judged by the confirmation method of simulation.
In circuit block diagram shown in Fig. 7, if lighting incandescent lamp bulb, electrical current A can be generated, and pass through electric current
A generates voltage V at the both ends of resistor R.Relay (light coupling relay) is acted using voltage V, and is sent out to monitoring arrangement
The number of delivering letters.If normally lighting incandescent lamp bulb, the contact of relay, which becomes, to be connected, and imports the letter from monitoring arrangement
Number.On the other hand, the core if incandescent lamp bulb breaks, voltage V disappears and the contact of relay becomes cutting, comes from without importing
The signal of monitoring arrangement.Therefore from monitoring arrangement, it is not known as flowing through the state of electric current A, to be judged as incandescent lamp bulb
Disconnected core.
Therefore, it is big not only to consume electric power for the incandescent lamp bulbs such as halogen lamp, and the rated life time is also shorter and frequent occurs because of disconnected core
Caused by replacement operation.Therefore recently as light source the shortcomings that capable of eliminating incandescent lamp bulb, increase low using consumption electric power
And the lights of the mark for the LED (light emitting diode) that the rated life time is also grown.Present applicant has also been proposed such as patent text
Using LED as the headlamp of light source disclosed in offering 2.
In this way using LED as in the case where the mark of light source, as shown in figure 8, usually using constant-current circuit as power supply
Device.Furthermore it is possible to consider the disconnected core detection device for directly using above-mentioned resistor types in the disconnected core detection of LED.
Patent document
Patent document 1: Japanese Unexamined Patent Publication 2002-42739 bulletin
Patent document 2: Japanese Unexamined Patent Publication 2016-96103 bulletin
Summary of the invention
Electrical current B however, as shown in figure 8, when the light source of mark is set as LED, due to power saving, when LED bright light
It is fewer than incandescent lamp bulb.Therefore, in above-mentioned disconnected core detection device, sometimes in the voltage V ' of the both ends of resistor R ' generation also mistake
It is small, to can not judge whether electric current reduces by the disconnected core of LED.
In addition, supply voltage changes in the range of preassigned in the power supply device of LED.Therefore, even if it is electric
The resistance value of resistance device R ' becomes smaller, if the supply voltage of LED has variation, the electric current for flowing through resistor R ' will also change.
Therefore, in above-mentioned disconnected core detection device, also can exist make to whether have caused because of the variation of input voltage curent change or
Whether person has broken the judgement of core the problem of thickening.
The present invention is problem possessed by the prior art more than being conceived to and completes, it is intended that providing energy
Enough do not influenced by the size of current or variation in voltage that flow through light source and clearly judge light source whether there is or not disconnected core, and can be effectively
Notify the disconnected core detection circuit and power supply device of the disconnected core of light source.
It is present in every invention below as purport of the invention for achieving the above object.
A kind of disconnected core detection circuit (20) of technical solution [1] is arranged on the luminous member to the light source for becoming mark (1)
Part (13) supplies in the power supply device (10) of electric current, for detecting the disconnected core of above-mentioned light-emitting component (13), which is characterized in that
Above-mentioned power supply device (10) has the constant-current circuit for keeping supply constant to the electric current of above-mentioned light-emitting component (13)
(12),
When above-mentioned light-emitting component (13) break core, above-mentioned constant-current circuit (12) can export the electricity more than pre-determined reference value
Pressure,
Have switch element (25), the switch element (25) is in the additional setting in the inside of above-mentioned power supply device (10) in constant current
On circuit (12), and switch motion is carried out based on being more than the voltage of above-mentioned pre-determined reference value,
By the switching for the circuit state that the switch motion by above-mentioned switch element (25) is carried out, to detect above-mentioned shine
The disconnected core of element (13).
Technical solution [2] is broken core detection circuit (20) documented by [1] according to the above technical scheme, which is characterized in that should
Disconnected core detection circuit (20) have: detection output section (30), the switch motion of above-mentioned switch element (25) can be connected/
The switching of dissengaged positions is as indicating that the broken detection signal of core of above-mentioned light-emitting component (13) exports to above-mentioned power supply device (10)
Outside.
Technical solution [3] is broken core detection circuit (20) documented by [2] according to the above technical scheme, which is characterized in that should
Disconnected core detection circuit has: notification unit (40) will test based on the detection signal exported from above-mentioned detection output section (30)
To above-mentioned light-emitting component (13) disconnected core the case where notify to the outside of above-mentioned power supply device (10).
A kind of technical solution [4] power supply device (100), light-emitting component (13) supply to the light source for becoming mark (2)
Electric current, which is characterized in that
The power supply device (100) only has multiple constant-current circuits (12) of above-mentioned quantity of light source, and the constant-current circuit (12) is right
Each light source of multiple above-mentioned light sources supplies supply to one or more light-emitting components (13) for becoming corresponding light source
Electric current be it is constant,
When at least some disconnected core in the light-emitting component (13) for becoming corresponding light source, each above-mentioned constant-current circuit (12)
The voltage more than pre-determined reference value can be exported respectively,
In the additional setting of being internally corresponding to each above-mentioned each constant-current circuit (12) of above-mentioned power supply device (100) based on super
The voltage of above-mentioned pre-determined reference value is crossed to carry out the switch element (25) of switch motion,
Correspond to each above-mentioned each constant-current circuit (12) and additional setting detection output together with above-mentioned switch element (25)
Portion (30), can be using the switching of the switch motion of above-mentioned switch element (25), that is, on/off state as the above-mentioned hair of expression
The broken detection signal of core of optical element (13) is exported to the outside of above-mentioned power supply device (100),
The power supply device (100) has: notification unit (40), based on the inspection exported from above-mentioned each detection output section (30)
Survey signal theory and, will test above-mentioned light-emitting component (13) break core the case where notify to the outer of above-mentioned power supply device (100)
Portion.
Technical solution [5] power supply device (100) documented by [4] according to the above technical scheme, which is characterized in that multiple
Constant-current circuit (12) shares at least a certain group in multiple above-mentioned switch elements (25) and above-mentioned detection output section (30).
Technical solution [6] power supply device (100) documented by [4] or [5] according to the above technical scheme, which is characterized in that
Above-mentioned light source is the light source for constituting the mark lamp (2) of rolling stock, and above-mentioned light-emitting component (13) is LED, and is equipped on railway
Vehicle.
Then, the effect based on above-mentioned solution unit is illustrated.
Disconnected core detection circuit (20) documented by above-mentioned technical proposal [1] are arranged on to the hair for forming mark (1) light source
Optical element (13) supplies the power supply device (10) of electric current in its own, rather than power supply device is individually installed at as existing
(10) or even on circuit.Power supply device (10) have be fed to light-emitting component (13) current control be constant constant-current circuit
(12), light-emitting component (13) is shone by the constant current of constant-current circuit (12).
The core if light-emitting component (13) breaks is more than the voltage of pre-determined reference value from constant-current circuit (12) output.In power supply
The inside of device (10), being additionally provided in constant-current circuit (12) based on constant-current circuit (12) are come from is more than pre-determined reference value
Voltage carries out the switch element (25) of switch motion.The circuit that can will be carried out by the switch motion of the switch element (25)
Detection of the switching of state as the disconnected core of light-emitting component (13).
It, can not be by external shadow according to the detection for the disconnected core that the internal circuit by such power supply device (10) is carried out
It rings, the size regardless of the electric current for flowing through light source all will clearly judge that whether there is or not disconnected cores for light source.In addition, only by simple
Circuit can realize the detection of disconnected core, also not need to prepare to detect the other device then filled for the core that breaks, thus will not
Cost is caused to increase.
Break core detection circuit (20) documented by [2] according to the above technical scheme, the switch of above-mentioned switch element (25) is dynamic
Make be on/off state switching, will be converted by detecting output section (30) indicates that light-emitting component (13) have broken core
Detection signal, and can export to the outside of power supply device (10).Thus, it is possible to which the switch motion of switch element (25) is made
Next output target is easily transferred to for detection signal and is flexibly used.
Break core detection circuit (20) documented by [3] according to the above technical scheme, can be based on from above-mentioned detection output section
(30) export detection signal, by notification unit (40) will test light-emitting component (13) break core the case where notify give power supply fill
Set the outside of (10).Thus, it is possible to effectively know the disconnected core of light-emitting component (13).
Power supply device (100) documented by [4] according to the above technical scheme, light source not only one but have it is multiple, each
In each of light source, all has the electric current fixation for making to supply one or more light-emitting components to same light source (13)
Constant-current circuit (12).Here, each constant-current circuit (12) in the light-emitting component (13) of corresponding light source at least some is disconnected
When core, output is more than the voltage of pre-determined reference value respectively.
Each of inside and each constant-current circuit (12) of power supply device (100) be correspondingly additionally provided with it is upper
The same switch element (25) of technical solution [1] is stated, each switch element (25) carries out based on being more than the voltage of pre-determined reference value
Switch motion.The switching of the on/off state of related switch motion, that is, switch element (25) is by being equally attached to set
The detection output section (30) on each of each constant-current circuit (12) is set, being converted into indicates that light-emitting component (13) have broken core
Detection signal, and export to power supply device (10) outside.
Then, based on from it is each detection output section (30) export detection signal theory and, by notification unit (40) will
Detect light-emitting component (13) break core the case where notify to the outside of power supply device (100).Even if as a result, in multiple light sources extremely
It is few to there is in some a light-emitting component (13) to break core, then it can also effectively know above-mentioned disconnected core.
Power supply device (100) documented by [5] according to the above technical scheme shares multiple open to multiple constant-current circuits (12)
It closes element (25) and detects at least a certain group in output section (30).Thus, it is possible to cut down number of components and simplify circuit, from
And cost can be reduced.
Such as documented by above-mentioned technical proposal [6], above-mentioned light source is the mark lamp (2) for constituting rolling stock
Light source, light-emitting component (13) are made of LED, and power supply device (100) is equipped on rolling stock.In this way, disconnected core detection circuit
(20) and power supply device (100) can be optimally applied to the mark lamp (2) of rolling stock.
Disconnected core detection circuit and power supply device involved according to the present invention pass through the inside electricity by power supply device itself
The detection that road is carried out, so as to which by externalities, the size regardless of the electric current for flowing through light source all will not clearly
Judging light source, whether there is or not disconnected cores.Furthermore it is possible to effectively know the disconnected core of light source.It further, only can by simple circuit
To realize the detection of disconnected core, the other device then filled is detected for the core that breaks without preparing, so that cost will not be caused
It increases.
Detailed description of the invention
Fig. 1 is the circuit block diagram for indicating disconnected core detection circuit involved in first embodiment of the invention.
Fig. 2 is to indicate to be equipped with the power supply device including core detection circuit of breaking involved in first embodiment of the invention
The circuit block diagram of mark.
Fig. 3 is the circuit block diagram for indicating to be equipped with the mark lamp of power supply device involved in second embodiment of the invention.
Fig. 4 is the circuit block diagram for indicating the major part of power supply device involved in second embodiment of the invention.
Fig. 5 be show schematically LED from power supply device involved in second embodiment of the invention occur disconnected core to
The explanatory diagram of process until disconnected core detection.
Fig. 6 is the disconnected core detection for showing schematically the LED from power supply device involved in second embodiment of the invention
The explanatory diagram of process until the output or even notice of detection signal.
Fig. 7 is the circuit block diagram for indicating power circuit relevant to existing incandescent lamp bulb and disconnected core detection device.
Fig. 8 is the circuit block diagram for indicating power supply device relevant to existing LED and disconnected core detection device.
The explanation of appended drawing reference
1: mark, 10: power supply device, 11: power circuit, 12: constant-current circuit, 13:LED, 20: disconnected core detection circuit, 21:
Resistor, 22: resistor, 22: resistor, 24: Zener diode, 25: transistor, 30: detection output section, 31: optocoupler relay
Device, 40: monitoring arrangement, 2: mark lamp, 100: power supply device.
Specific embodiment
In the following, Ming Dynasty's table various embodiments of the invention for reference to the accompanying drawings.
As shown in Figure 1 and Figure 2, power supply device 10 involved in first embodiment is supplied to the light source for forming mark 1
Electric current, disconnected core detection circuit 20 are the circuits for the disconnected core for being arranged on the inside of power supply device 10 itself and detecting light-emitting component.
Here the light source of mark 1 is used as the lights of various marks, such as headlamp applied to rolling stock or taillight,
The mark lamp of other vehicles such as the headlight of automobile or ship or aircraft driving on the road.Further, as
Mark 1 is also suitable the aviation obstruction beacon being for example arranged on high-rise or is arranged in road other than above-mentioned mark lamp
On traffic lights etc..
The light-emitting component for forming the light source of mark 1 is mainly made up of semiconductor, such as is applicable in LED, organic EL, LD
(semiconductor laser) etc..In the following, being illustrated to the example that LED13 is used as light-emitting component.LED13 can be surface actual load type
Shaped like chips or be the bulb-shaped of similar shell type dril, arbitrarily select illuminant colour.In addition, the quantity of LED13 is not limited to
One, 1 light source can be made up of multiple LED13 of series connection.
As shown in Fig. 2, mark 1 involved in present embodiment has: power supply device 10, LED13, monitoring arrangement 40.This
In the structure of power supply device 10 have: power circuit 11, constant-current circuit 12, disconnected core detection circuit 20, there are also detection output sections 30
Deng.Power circuit 11 is will to be converted to shining suitable for LED13 by the DC voltage of the supplies such as battery supply (such as DC100V)
Other DC voltage circuit.
Constant-current circuit 12 is the mode to keep current value constant to control the DC voltage converted by above-mentioned power circuit 11
And it supplies to the circuit of each LED13.Constant-current circuit 12 is in addition to having the power input terminal connecting with above-mentioned power circuit 11
Except 12a, the constant current output terminal 12b connecting with LED13, it is also equipped with output voltage terminal 12c.
Constant-current circuit 12, which has, usually carries out the voltage for being applied to LED13 when LED13 is flowed through in the constant current of preassigned
The function of detection, and be configured to export the voltage with the voltage identical value for being applied to LED13 by output voltage terminal 12c.In perseverance
In current circuit 12, load lightens if LED13 breaks core, so that output voltage rises, from output voltage terminal 12c output than logical
The bigger voltage of the voltage often exported.
Inside constant-current circuit 12, disconnected core detection circuit 20 or detection output section 30 are connected to output voltage terminal 12c
Line on.The structure of disconnected core detection circuit 20 has: there are also the transistors of switch element for resistor 21~23, Zener diode 24
25 etc..The anode of Zener diode 24 is connect via resistor 21 with output voltage terminal 12c first, the yin of Zener diode 24
Pole is connect with the base stage of aftermentioned transistor 25.
Resistor 22 connects between the minus earth of Zener diode 24, Base-Emitter of the resistor 22 in transistor 25
Between be connected in parallel.Zener diode 24 is the element that uses to obtain the purpose of constant voltage, has following characteristic, i.e., inverse
When direction applies voltage, if it exceeds pre-determined reference value (Zener voltage) then flows through electric current.
Here, the voltage (Vf) applied in LED bright light is set to be less than the pre-determined reference value of Zener diode 24
The value of (Zener voltage Vz).Therefore, the not applicable voltage more than pre-determined reference value of usual zener diode 24, electric current do not flow to
Next place of Zener diode 24.On the other hand, it if the voltage exported when LED13 breaks core is more than pre-determined reference value, applies
The overvoltage added is exported from Zener diode 24 to from next.
Transistor 25 is the switch element that switch motion is carried out based on the voltage flowed into from above-mentioned Zener diode 24, is led to
It crosses the switch motion and carrys out switching circuit state.This indicates the disconnected core detection of LED13 as a result.Transistor 25 is specifically for example
It is made of NPN transistor.Therefore transistor 25, which amplifies, flows to the electric current of emitter 25b from base stage 25a, and is configured to from base
When pole 25a flows into electric current, electric current is flowed through from collector 25c to emitter 25b.
The base stage 25b of transistor 25 is connected between the cathode of Zener diode 24 and resistor 22.22 quilt of resistor
It is connected between the base stage 25b- emitter 25b of transistor 25, emitter 25b ground connection.In addition, emitter 25b and aftermentioned detection
Output section 30 is the anode connection of 1 side of light coupling relay 31.The collector 25c of transistor 25 is via resistor 23 and power supply
Connection, in addition connect with the cathode of 1 side of light coupling relay 31.
Transistor 25 is turned on when electric current flows to emitter 25b from base stage 25a, from base stage 25a to emitter
25b flows through the electric current being amplified.On the other hand, electric current not from base stage 25a flow to emitter 25b it is usual when, in electricity
The dissengaged positions not flowed through between emitter 25b and collector 25c is flowed, electric current does not flow to emitter from base stage 25a
25b。
Detecting output section 30 can be using the switching of the switch motion of above-mentioned transistor 25, that is, on/off state as expression
LED13 broken core detection signal and export to the outside of power supply device 10.It detects output section 30 and comes from transistor 25 by receiving
Electric current, generate detection signal by connection/switching switch, and by the detection signal be sent to next equipment it is various after
Electric appliance is constituted.The detection output section 30 of present embodiment is made of light coupling relay 31.
Light coupling relay 31 is the MOSFET that 2 sides are driven using the light generated and energization by the LED to 1 side
(semiconductor element), and switch connection/switching state non-contact relay of 2 lateral circuits.Light coupling relay 31 passes through
It is powered to 1 side, is turned on 2 sides.Compared to the mechanical relay that contact is mechanically acted, optocoupler relay
Device 31 can minimize, and also have superior characteristic in the reliability of contact movement or service life etc..
The anode and cathode of 1 side of light coupling relay 31 is connect with transistor 25 as described above.Therefore, work as transistor
25 be common dissengaged positions when, 1 side of light coupling relay 31 is energized, and 2 sides of light coupling relay maintain connection shape
State.If transistor 25 is switched to on-state, 1 side short circuit of light coupling relay 31 when LED13 breaks core
(short), 2 lateral incisions of light coupling relay 31 are changed to dissengaged positions.2 lateral incisions based on the light coupling relay 31 are changed to cutting
State and caused by electrical change become detection signal.
In addition, the anode and cathode of 1 side of light coupling relay 31 is connect with the monitoring arrangement 40 for forming notification unit.This
In, notification unit according to the detection signal (on-state → dissengaged positions) exported from above-mentioned light coupling relay 31 will test to
The case where disconnected core of LED13, notifies to the outside of power supply device 10.Monitoring arrangement 40 is the dress that disconnected core detection circuit 20 has
It sets, but the outside of power supply device 10 is set.
Notification unit is not limited to monitoring arrangement 40, can also be by other LED lights, the alarm device for exporting alarm song etc.
It constitutes.Such as be also configured to, according to above-mentioned detection signal, it is arranged in linkage with bright light/state of turning off the light of LED13 same bright
The LED light for lamp/turn off the light the state of its own or further judges LED light according to external equipment by visual observation
State.In addition, what disconnected core detection circuit 20 or light coupling relay 31 had is contact, monitoring arrangement 40 will not be supplied by these
To electric current.
Then, the work of the power supply device 10 of first embodiment is illustrated centered on the movement for core detection circuit 20 of breaking
With.As shown in Figure 1, disconnected core detection circuit 20 is assembled in the inside of power supply device 10 itself and constitutes.It therefore, will not be as existing
Disconnected core detection device use the external resistor of power supply device like that, but directly use the Constant Electric Current of power supply device 10 itself
The output that road 12 has, it is possible thereby to carry out core detection of accurately breaking.
If power supply device 10 is set as connecting when lighting the light source of mark 1, from the constant current output of constant-current circuit 12
Terminal 12b is to LED13 output constant current, LED13 bright light.When this is usual, exported by the output voltage terminal 12c of constant-current circuit 12
With the voltage (Vout=Vf) of voltage (Vf) identical value for being applied to LED13.Here the voltage (Vf) for being applied to LED13 is set
The smaller value of pre-determined reference value (Zener voltage Vz) for the Zener diode 24 connected than output voltage terminal 12c.
Therefore be usually misaligned receive diode 24 apply be more than Zener voltage Vz voltage, the relationship of Vout (=Vf) < Vz
Set up, electric current not from Zener diode 24 flow to it is next from.Therefore the detection electricity between Zener diode 24 and transistor 25
Press Vp be 0, will not the base stage 25a to transistor 25 flow through electric current, transistor 25 maintains dissengaged positions.
It is energized as a result, with 1 side of the emitter 25b of transistor 25 and collector the 25c light coupling relay 31 connecting,
2 sides of light coupling relay 31 are on-state.When usual, since 2 sides of light coupling relay 31 are on-state, lead
Enter the electrical or even signal from monitoring arrangement 40 connecting with 2 sides.
At this point, may determine that the disconnected core of LED13 by monitoring arrangement 40 but normal.That is, it is considered that monitoring
The circuit block diagram etc. for example including the icon for indicating LED13 is shown on the picture of device 40, and is lighted, to indicate to be equivalent to
The icon of some LED13 is also normal, or the situation etc. for indicating normal is shown by text.
If LED13 breaks core in the light source bright light of mark 1, the output voltage of constant-current circuit 12 rises, and from output
Voltage terminal 12c output than it is usual when the bigger voltage of the voltage that exports.If the voltage Vout of output voltage terminal 12c is higher than
The Zener voltage Vz (Vout > Vz) of Zener diode 24, the then overvoltage applied are output to next from Zener diode 24
Place.Therefore the switch that the detection voltage Vp for the base stage 25a for flowing through transistor 25 becomes to carry out transistor 25 than 0 big (Vp > 0) is dynamic
Make, is switched to on-state from common dissengaged positions.
When transistor 25 is switched to on-state, 1 side short circuit (short) of light coupling relay 31, light coupling relay
2 lateral incisions be changed to dissengaged positions.2 lateral incisions based on the light coupling relay 31 be changed to dissengaged positions and caused by electrical change
As detection signal.Thus, it is possible to which the switch motion of transistor 25 is next to be easily transferred to as detection signal
Output target is simultaneously flexibly used.In the present embodiment, it if light coupling relay 31 is switched to dissengaged positions, will not lead
Enter the electrical or even signal from the monitoring arrangement 40 connecting with light coupling relay 31.
At this point, in the picture of monitoring arrangement 40, such as the object of bright light control, can make to be equivalent to disconnected core and do not have
There is the icon of the LED13 of bright light to flash, or shows warning by text.Thus, it is possible to which the disconnected core of LED13 is effectively led to
Know to outside, the fact that so as to easily judge disconnected core.The notice of this disconnected core is not limited to the aobvious of above-mentioned monitoring arrangement 40
Show, can also be judged by the state of the bright light with LED13/state of turning off the light linkage LED light.
As described above, according to the internal circuit of power supply device 10 carry out disconnected core detection, can not by externalities,
Size regardless of the electric current for flowing through LED, clearly to judge LED13, whether there is or not disconnected cores.In addition, can only pass through simple electricity
The detection of the disconnected core of LED13 is realized on road, is not needed to prepare to detect the other device then filled for the core that breaks, will not be caused
Cost increases.
Fig. 3~Fig. 6 indicates second embodiment of the invention.
Present embodiment is instead of being embodied as applying as the mark 1 of simple model in above-mentioned first embodiment
In the power supply device 100 of the mark lamp 2 of rolling stock.Here the light source of mark lamp 2 has pair of right and left headlamp 3A, 3B and tail
Totally 3, lamp 4.In addition, marking the same symbol to the position of type identical with first embodiment, simultaneously the repetitive description thereof will be omitted.
Headlamp 3A, 3B are made of the LED13 of white light, and taillight 4 is made of the LD13 of red light, the quantity point of LED13
It is not limited to one, constitutes a light source by multiple LED13 of series connection.In addition, in the light sources such as headlamp 3A, 3B
Each, is configured to allow hand over by the major-minor switching circuit 14 having in power supply device 100 and light in multiple LED13 entirely
The king light (height) in portion and the secondary lamp (low) for only lighting a part.
As shown in figure 3, power supply device 100 only has the constant current corresponding with each of multiple light sources of quantity of light source
Circuit 12.That is, constant-current circuit (1) 12A is corresponding with the headlamp 3A of a side, the headlamp 3B of constant-current circuit (2) 12B and another party
Corresponding, constant-current circuit (3) 12C is corresponding with taillight 4.In the following, being set as Constant Electric Current in general name constant-current circuit (1) 12A~(3) 12C
Road 12.
Each of inside and each constant-current circuit 12 of power supply device 100 be correspondingly additionally provided with respectively including
The equal disconnected core detection circuit 20 of the transistor 25 of the structure that is the same as the above first embodiment and by identical light coupling relay
The detection output section 30 of 31 compositions.Yet it is not desirable to centainly come according to each constant-current circuit 12 (each light source) it is separately right
Disconnected core detection circuit 20 and detection output section 30 should be set.
I.e., it is possible to be configured to share multiple constant-current circuits 12 the disconnected core detection circuit 20 of multiple groups and detection output section 30
In at least any one group.In the example shown in Fig. 3, disconnected core detection electricity corresponding with 2 constant-current circuits 12A, 12B is shared
Road 20 and detection output section 30.Theory here according to the detection signal exported from each detection output section 30 and, with above-mentioned the
One embodiment similarly will test out the case where disconnected core of above-mentioned LED13 and be notified by monitoring arrangement 40.
Fig. 4 merely illustrates major part, but forms respective 2 sides of the light coupling relay 31 of each detection output section 30
It mutually connects and is connect with monitoring arrangement 40 each other.It therefore can be by the theory of the output from each light coupling relay 31 and as inspection
Signal is surveyed to be exported.Here, the wiring for being connected in series with each other 2 sides of each light coupling relay 31 become export each optocoupler after
Electric appliance 31 detection signal theory sum or circuit.In addition, omitting the perseverance of constant-current circuit 12B and constant-current circuit 12C in Fig. 4
Flow the diagram of a part of structure of output terminal, corresponding LED13 etc..
In this way, when having multiple light sources and corresponding constant-current circuit 12, if in arbitrary light source in Fig. 5
Disconnected core occurs, then in the disconnected core detection circuit 20 that respective constant-current circuit 12 has in each, transistor 25, which becomes, to be connected
State.In addition, as second embodiment, in shared disconnected core detection circuit 20 corresponding with 2 constant-current circuits 12A, 12B
With detection output section 30 when, the connection 1 of the transistor 25 of Fig. 5 and connect 2 as dotted line encirclement really as 1 transistor
25 connection and exported.
Then in Fig. 6, due to the connection of transistor 25, corresponding light coupling relay 31 is switched to cutting shape
State.The cutting 1 and cutting 2 of light coupling relay 31 surrounded by the dotted line are also used as 1 in the case where second embodiment in Fig. 6
The cutting of light coupling relay 31 and by output one detection signal.In any case multiple detection signals as described above via or electricity
Road is output to monitoring arrangement 40, and the core so if any one LED13 in 3 light sources breaks can then pass through monitoring arrangement
40 effectively notify.It is possible thereby to which the replacement of light source (headlamp 3A etc.) etc. after being broken quickly is disposed.
In addition, being shared by 2 constant-current circuits 12A, 12B originally according to the quantity of light source according to second embodiment
1 group in the disconnected core detection circuit 20 of 3 groups prepared and detection output section 30, number of components can be cut down and simplify circuit, from
And cost can be reduced.
More than, by Detailed description of the invention embodiments of the present invention, but specific structure is not limited to above-mentioned embodiment party
Formula, without departing from the range of purport of the invention change and addition be also included in the present invention.Such as disconnected core detection circuit
20 switch element is made of the transistor 25 of NPN type, but if being that by same switch motion,
As other semiconductor switch, can also be made of parallel regulator and FET (field effect transistor) etc..
Disconnected core detection circuit according to the present invention and power supply device can be widely used in using light-emitting component as
The various marks of light source.
Claims (6)
1. a kind of disconnected core detection circuit is arranged on the power supply device to the light-emitting component supply electric current for the light source for becoming mark
In, for detecting the disconnected core of above-mentioned light-emitting component, which is characterized in that
Above-mentioned power supply device has and makes to supply the constant-current circuit constant to the electric current of above-mentioned light-emitting component,
When above-mentioned light-emitting component breaks core, above-mentioned constant-current circuit can export the voltage more than pre-determined reference value,
Has switch element, which adds in the inside of above-mentioned power supply device is arranged on constant-current circuit, and based on super
The voltage of above-mentioned pre-determined reference value is crossed to carry out switch motion,
By the switching for the circuit state that the switch motion by above-mentioned switch element is carried out, to detect the disconnected of above-mentioned light-emitting component
Core.
2. disconnected core detection circuit according to claim 1, which is characterized in that
The disconnected core detection circuit has: detection output section, by the switch motion of above-mentioned switch element, that is, on/off state
Switching is exported as the broken detection signal of core of the above-mentioned light-emitting component of expression to the outside of above-mentioned power supply device.
3. disconnected core detection circuit according to claim 2, which is characterized in that
The disconnected core detection circuit has: notification unit will test based on the detection signal exported from above-mentioned detection output section
The case where disconnected core of above-mentioned light-emitting component, notifies to the outside of above-mentioned power supply device.
4. a kind of power supply device supplies electric current to the light-emitting component for the light source for becoming mark, which is characterized in that
The power supply device only has multiple constant-current circuits of above-mentioned quantity of light source, and the constant-current circuit is each to multiple above-mentioned light sources
A light source keeps supply constant to the electric current for one or more light-emitting components for becoming corresponding light source,
When at least some disconnected core in the light-emitting component for becoming corresponding light source, each above-mentioned constant-current circuit can export respectively
More than the voltage of pre-determined reference value,
In the additional setting of being internally corresponding to each above-mentioned each constant-current circuit of above-mentioned power supply device based on more than above-mentioned predetermined base
The voltage of quasi- value carries out the switch element of switch motion,
Correspond to each above-mentioned each constant-current circuit together with above-mentioned switch element and additional setting detection output section, detection output
It portion can be using the switching of the switch motion of above-mentioned switch element, that is, on/off state as indicating that above-mentioned light-emitting component broken core
Detection signal export to the outside of above-mentioned power supply device,
The power supply device has: notification unit, based on from it is above-mentioned it is each detection output section export detection signal theory and, will
Detect above-mentioned light-emitting component break core the case where notify to the outside of above-mentioned power supply device.
5. power supply device according to claim 4, which is characterized in that
At least a certain group in multiple above-mentioned switch elements and above-mentioned detection output section is shared to multiple constant-current circuits.
6. power supply device according to claim 4 or 5, which is characterized in that
Above-mentioned light source is the light source for constituting the mark lamp of rolling stock, and above-mentioned light-emitting component is LED, and is equipped on railcar
?.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711215789.2A CN109839604A (en) | 2017-11-28 | 2017-11-28 | Disconnected core detection circuit and power supply device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711215789.2A CN109839604A (en) | 2017-11-28 | 2017-11-28 | Disconnected core detection circuit and power supply device |
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| CN109839604A true CN109839604A (en) | 2019-06-04 |
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ID=66880977
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| CN201711215789.2A Pending CN109839604A (en) | 2017-11-28 | 2017-11-28 | Disconnected core detection circuit and power supply device |
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Citations (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2195099Y (en) * | 1994-05-11 | 1995-04-19 | 鞍山钢铁公司 | Cable core break tester |
| JP2006221886A (en) * | 2005-02-09 | 2006-08-24 | Koito Mfg Co Ltd | Lighting control device of vehicular lamp tool |
| CN201289516Y (en) * | 2008-10-14 | 2009-08-12 | 李艳 | Device for testing LED photoelectric parameter |
| CN102761368A (en) * | 2012-07-21 | 2012-10-31 | 中铁十七局集团电气化工程有限公司 | Cable broken core alarm |
| CN203984755U (en) * | 2014-07-08 | 2014-12-03 | 天津工大海宇照明部品有限公司 | A kind of LED fault feedback controller |
| CN204719215U (en) * | 2015-06-04 | 2015-10-21 | 合肥合大智能科技有限公司 | A kind of LED drives detection module |
| CN204992541U (en) * | 2015-09-25 | 2016-01-20 | 新宝电机(东莞)有限公司 | Switch power -supply overvoltage protecting circuit |
| CN205139345U (en) * | 2015-10-28 | 2016-04-06 | 四川新力光源股份有限公司 | LED check out test set that throws light on |
| CN205177339U (en) * | 2015-12-25 | 2016-04-20 | 四川新力光源股份有限公司 | Subway tunnel advertising light boxes with LED damages automated inspection function |
| CN105991052A (en) * | 2015-03-16 | 2016-10-05 | 德尔福技术有限公司 | Rectifier circuit with reduced reverse recovery time |
| CN206077780U (en) * | 2016-10-10 | 2017-04-05 | 武汉通畅汽车电子照明有限公司 | LED protection circuit |
| JPWO2016111008A1 (en) * | 2015-01-09 | 2017-09-21 | 新電元工業株式会社 | LED lamp driving device |
-
2017
- 2017-11-28 CN CN201711215789.2A patent/CN109839604A/en active Pending
Patent Citations (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2195099Y (en) * | 1994-05-11 | 1995-04-19 | 鞍山钢铁公司 | Cable core break tester |
| JP2006221886A (en) * | 2005-02-09 | 2006-08-24 | Koito Mfg Co Ltd | Lighting control device of vehicular lamp tool |
| CN201289516Y (en) * | 2008-10-14 | 2009-08-12 | 李艳 | Device for testing LED photoelectric parameter |
| CN102761368A (en) * | 2012-07-21 | 2012-10-31 | 中铁十七局集团电气化工程有限公司 | Cable broken core alarm |
| CN203984755U (en) * | 2014-07-08 | 2014-12-03 | 天津工大海宇照明部品有限公司 | A kind of LED fault feedback controller |
| JPWO2016111008A1 (en) * | 2015-01-09 | 2017-09-21 | 新電元工業株式会社 | LED lamp driving device |
| CN105991052A (en) * | 2015-03-16 | 2016-10-05 | 德尔福技术有限公司 | Rectifier circuit with reduced reverse recovery time |
| CN204719215U (en) * | 2015-06-04 | 2015-10-21 | 合肥合大智能科技有限公司 | A kind of LED drives detection module |
| CN204992541U (en) * | 2015-09-25 | 2016-01-20 | 新宝电机(东莞)有限公司 | Switch power -supply overvoltage protecting circuit |
| CN205139345U (en) * | 2015-10-28 | 2016-04-06 | 四川新力光源股份有限公司 | LED check out test set that throws light on |
| CN205177339U (en) * | 2015-12-25 | 2016-04-20 | 四川新力光源股份有限公司 | Subway tunnel advertising light boxes with LED damages automated inspection function |
| CN206077780U (en) * | 2016-10-10 | 2017-04-05 | 武汉通畅汽车电子照明有限公司 | LED protection circuit |
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Application publication date: 20190604 |