A calculation method and device for LED damage rate and LED signal machine

Abstract

The present invention provides a calculation method, a calculation device and an LED signal machine for LED damage rate, wherein the calculation method comprises: defining five signal machine lighting states: light off, red light on, green light on, yellow light on, and red and yellow light on; respectively collecting the current I passing through the filament relay DJ and the second filament relay 2DJ in the signal machine lighting circuit; DJ and I 2DJ , where the current passing through DJ is recorded as DJ current, and the current passing through 2DJ is recorded as 2DJ current; when the signal light is in the red light, then: Red light LED damage rate = (I 0H ‑I DJ )*X% / (I 0H ‑I X%H ); where I 0H Refers to the reference lighting current of the red light when the damage rate is 0; X% is the reference damage rate; I X%H Refers to the reference lighting current when the damage rate of the red light is X%; similarly, calculate the LED damage rate when the green light, yellow light, red and yellow light are on.

Description

Technical Field

[0001] The invention relates to the field of railway signal machines, and in particular to a calculation method and a calculation device for LED damage rate and an LED signal machine. Background Art

[0002] Railway signal lights are display devices that direct train operations and ensure safe train travel. Display colors include red, yellow, green, blue, and moon white, and usually consist of one to four light positions depending on needs.

[0003] The luminous disc signal uses an LED array composed of multiple LEDs as the light source. The LED driving circuit is designed as a series and parallel combination. The damage of a single LED will not affect the use of the LED signal. However, when the number of damaged LEDs increases, it will directly affect the brightness of the LED signal and other indicators, thereby affecting the use of the LED signal.

[0004] The LED damage rate of a signal light refers to the percentage of damaged LED light-emitting diodes to the total number of LED light-emitting diodes in the LED light-emitting disk. It can intuitively indicate the damage status of the LED light-emitting diodes of the LED signal light. Monitoring the LED damage rate helps signal maintenance personnel to grasp the working status of the signal light at any time, making it easier for signal maintenance personnel to detect and handle LED signal light failures as early as possible.

[0005] The usual method for calculating the LED damage rate of signal lights is to add a brightness collection device to the outdoor lighting unit and reflect the number of LED damages through the brightness index. However, this method requires an external collection device and is easily affected by ambient light. Summary of the invention

[0006] The purpose of the present invention is to provide a method and device for calculating the damage rate of an LED and an LED signal machine in view of the shortcomings of the prior art.

[0007] In order to achieve the above object, the technical solution adopted by the present invention is:

[0008] A first aspect of the present invention provides a method for calculating a damage rate of an LED in an LED signal, the method comprising:

[0009] Define five signal light states: off, red, green, yellow, and red and yellow;

[0010] The currents passing through the filament relay DJ and the second filament relay 2DJ in the signal lighting circuit are respectively collected, wherein the current passing through DJ is recorded as DJ current, and the current passing through 2DJ is recorded as 2DJ current;

[0011] When the signal light is on red, there are:

[0012] Red LED damage rate = (I 0H -I DJ )* X% / (I 0H -I X%H ) ;

[0013] When the signal light is on green, there are:

[0014] Green LED damage rate = (I 0L -I DJ )* X% / (I 0L -I X%L ) ;

[0015] When the signal light is on in yellow, there are:

[0016] Yellow LED damage rate = (I 0U -I DJ )* X% / (I 0U -I X%U )

[0017] When the signal light is in red and yellow, there are:

[0018] Red LED damage rate = (I 0H -I DJ )* X% / (I 0H -I X%H )

[0019] Yellow LED damage rate = (I 0U -I 2DJ )* X% / (I 0U -I X%U )

[0020] Among them, I 0H ,I 0L ,I 0U Refers to the reference lighting current of the red light, green light and yellow light respectively when the damage rate is 0; the alarm threshold of the filament alarm instrument is set to the lighting current value measured when X% of the LED harness is disconnected, and X% is recorded as the reference damage rate; I X%H ,I X%L ,I X%U Refers to the reference lighting current of the red light, green light and yellow light when the damage rate is X%; I DJ ,I 2DJ They refer to the measured values ​​of DJ current and 2DJ current respectively.

[0021] Based on the above, the reference damage rate X% is set to 25% or 30%.

[0022] A second aspect of the present invention provides a device for calculating the damage rate of LEDs in an LED signal, comprising:

[0023] The lighting current acquisition module, the sampling position is at the beginning of the signal lighting circuit, and is used to respectively collect the current passing through the filament relay DJ and the second filament relay 2DJ in the signal lighting circuit in real time, where the current passing through DJ is recorded as I DJ , the current passing through 2DJ is recorded as I 2DJ ;

[0024] The signal light state monitoring module is used to monitor the current light state of the LED signal. Five signal light states are predefined: off, red, green, yellow, and red and yellow.

[0025] The LED damage rate calculation module is connected to the lighting current acquisition module and the signal lighting state monitoring module, and is used to calculate the LED damage rate of the corresponding signal lamp position according to the current lighting state of the LED signal; wherein,

[0026] When the signal light is on red, there are:

[0027] Red LED damage rate = (I 0H -I DJ )* X% / (I 0H -I X%H ) ;

[0028] When the signal light is on green, there are:

[0029] Green LED damage rate = (I 0L -I DJ )* X% / (I 0L -I X%L ) ;

[0030] When the signal light is on in yellow, there are:

[0031] Yellow LED damage rate = (I 0U -I DJ )* X% / (I 0U -I X%U ) ;

[0032] When the signal light is in red and yellow, there are:

[0033] Red LED damage rate = (I 0H -I DJ )* X% / (I 0H -I X%H ) ;

[0034] Yellow LED damage rate = (I 0U -I 2DJ )* X% / (I0U -I X%U );

[0035] Among them, I 0H ,I 0L ,I 0U They refer to the reference lighting currents of the red light, green light, and yellow light when the damage rate is 0, respectively, and are written into the configuration file of the LED damage rate calculation module as constant parameters; the alarm threshold of the filament alarm is set to the lighting current value measured when X% of the LED harness is disconnected, and X% is recorded as the reference damage rate, which is written into the configuration file of the LED damage rate calculation module as a constant parameter; I X%H ,I X%L ,I X%U They respectively refer to the reference lighting currents of the red light, green light, and yellow light when the damage rate is X%, and are written into the configuration file of the LED damage rate calculation module as constant parameters.

[0036] A third aspect of the present invention provides an LED signal, which uses the above-mentioned method for calculating the LED damage rate in an LED signal to calculate the LED damage rate of each lamp position of the LED signal.

[0037] Compared with the prior art, the present invention has outstanding substantive features and significant progress, specifically:

[0038] 1. There is no need to add data collection equipment to the outdoor lighting unit. You only need to monitor the DJ current, 2DJ current and lighting status indoors, and the LED damage rate monitoring function can be realized through software calculation.

[0039] 2. The LED damage rate can be calculated for each light position of the LED signal light. BRIEF DESCRIPTION OF THE DRAWINGS

[0040] Figure 1 This is the control circuit schematic of a three-display signal machine. DETAILED DESCRIPTION

[0041] The technical solution of the present invention is further described in detail below through specific implementation methods.

[0042] Example 1

[0043] Figure 1 The figure shows the control circuit schematic diagram of a three-display signal machine. The lighting status of the signal machine includes: off, red, green, yellow, red and yellow.

[0044] a) Turn off the lights:

[0045] DDJ (lighting relay) is energized, and the red, green and yellow lights are all off;

[0046] DJ and 2DJ both fall down, and no current flows through DJ and 2DJ;

[0047] b) Red light:

[0048] DDJ falls, LXJ falls, ZXJ (main line relay) falls, YXJ (guide signal relay) falls, the red light is on, the green light is off, and the yellow light is off;

[0049] DJ is sucked up, 2DJ falls down, the red light turns on and current flows through DJ;

[0050] c) Green light:

[0051] DDJ falls, LXJ rises, ZXJ rises, YXJ falls, green light turns on, red light turns off, yellow light turns off;

[0052] DJ is sucked up, 2DJ falls down, the green light turns on and current flows through DJ;

[0053] b) Yellow light:

[0054] DDJ falls, LXJ is sucked up, ZXJ falls, YXJ falls, the yellow light is on, the red light is off, and the green light is off;

[0055] DJ is sucked up, 2DJ falls down, the yellow light turns on and current flows through DJ;

[0056] d) Red and yellow lights:

[0057] DDJ falls, LXJ falls, ZXJ falls, YXJ is sucked up, the red light is on, the yellow light is on, and the green light is off;

[0058] DJ is sucked up, 2DJ is sucked up, the red light is turned on and the current passes through DJ, and the yellow light is turned on and the current passes through 2DJ.

[0059] The current passing through DJ (filament relay) is referred to as DJ current, and the current passing through 2DJ (second filament relay) is referred to as 2DJ current, which is also commonly called filament relay current, reflecting the lighting status of the signal machine.

[0060] Based on the above, this embodiment provides a method for calculating the damage rate of LEDs in an LED signal, the method comprising:

[0061] Define five signal light states: off, red, green, yellow, and red and yellow;

[0062] The currents passing through the filament relay DJ and the second filament relay 2DJ in the signal lighting circuit are respectively collected, wherein the current passing through DJ is recorded as DJ current, and the current passing through 2DJ is recorded as 2DJ current;

[0063] When the signal light is on red, there are:

[0064] Red LED damage rate = (I0H -I DJ )* X% / (I 0H -I X%H ) ;

[0065] When the signal light is on green, there are:

[0066] Green LED damage rate = (I 0L -I DJ )* X% / (I 0L -I X%L ) ;

[0067] When the signal light is on in yellow, there are:

[0068] Yellow LED damage rate = (I 0U -I DJ )* X% / (I 0U -I X%U )

[0069] When the signal light is in red and yellow, there are:

[0070] Red LED damage rate = (I 0H -I DJ )* X% / (I 0H -I X%H )

[0071] Yellow LED damage rate = (I 0U -I 2DJ )* X% / (I 0U -I X%U )

[0072] Among them, I 0H ,I 0L ,I 0U Refers to the reference lighting current of the red light, green light and yellow light respectively when the damage rate is 0; the alarm threshold of the filament alarm instrument is set to the lighting current value measured when X% of the LED harness is disconnected, and X% is recorded as the reference damage rate; I X%H ,I X%L ,I X%U Refers to the reference lighting current of the red light, green light and yellow light when the damage rate is X%; I DJ ,I 2DJ They refer to the measured values ​​of DJ current and 2DJ current respectively.

[0073] When the lighting unit is replaced, each parameter value is updated according to the test value after the replacement. Specifically, the reference damage rate X% can be set to 25% or 30%.

[0074] Example 2

[0075] This embodiment provides a device for calculating the damage rate of LEDs in an LED signal, comprising:

[0076] The lighting current acquisition module, the sampling position is at the beginning of the signal lighting circuit, and is used to respectively collect the current passing through the filament relay DJ and the second filament relay 2DJ in the signal lighting circuit in real time, where the current passing through DJ is recorded as I DJ , the current passing through 2DJ is recorded as I 2DJ ;

[0077] The signal light state monitoring module is used to monitor the current light state of the LED signal. Five signal light states are predefined: off, red, green, yellow, and red and yellow.

[0078] The LED damage rate calculation module is connected to the lighting current acquisition module and the signal lighting state monitoring module, and is used to calculate the LED damage rate of the corresponding signal lamp position according to the current lighting state of the LED signal; wherein,

[0079] When the signal light is on red, there are:

[0080] Red LED damage rate = (I 0H -I DJ )* X% / (I 0H -I X%H ) ;

[0081] When the signal light is on green, there are:

[0082] Green LED damage rate = (I 0L -I DJ )* X% / (I 0L -I X%L ) ;

[0083] When the signal light is on in yellow, there are:

[0084] Yellow LED damage rate = (I 0U -I DJ )* X% / (I 0U -I X%U ) ;

[0085] When the signal light is in red and yellow, there are:

[0086] Red LED damage rate = (I 0H -I DJ )* X% / (I 0H -I X%H ) ;

[0087] Yellow LED damage rate = (I0U -I 2DJ )* X% / (I 0U -I X%U );

[0088] Parameter Description:

[0089] I 0H ,I 0L ,I 0U : Refers to the reference lighting current of the red light, green light, and yellow light when the damage rate is 0; when the signal is first installed, the lighting current acquisition module collects I 0H ,I 0L ,I 0U Write into the configuration file of LED damage rate calculation module as constant parameter;

[0090] X%: is the reference damage rate, which is written into the configuration file of the LED damage rate calculation module as a constant parameter;

[0091] I X%H ,I X%L ,I X%U : Refers to the reference lighting current of the red light, green light and yellow light when the damage rate is X%; when the signal is initially installed and debugged, the lighting current value when X% of the red light, green light and yellow light LED harnesses are disconnected is recorded as I 25%H ,I 25%L ,I 25%U , and written into the configuration file of the LED damage rate calculation module as a constant parameter to participate in the LED damage rate calculation.

[0092] When the lighting unit is replaced, each parameter value is updated according to the test value after the replacement. Specifically, the reference damage rate X% can be set to 25% or 30%.

[0093] Example 3

[0094] This embodiment provides an LED signal, which uses the calculation method of the LED damage rate in the LED signal described in Embodiment 1 to calculate the LED damage rate of each lamp position of the LED signal.

[0095] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the present invention rather than to limit it. Although the present invention has been described in detail with reference to the preferred embodiments, ordinary technicians in the field should understand that the specific implementation methods of the present invention can still be modified or some technical features can be replaced by equivalents without departing from the spirit of the technical solution of the present invention, which should be included in the scope of the technical solution for protection of the present invention.

Claims

1. A method for calculating the damage rate of LEDs in LED signal machines, characterized in that: The method comprises: Define five signal light states: off, red, green, yellow, and red and yellow; The currents passing through the filament relay DJ and the second filament relay 2DJ in the signal lighting circuit are respectively collected, wherein the current passing through DJ is recorded as DJ current, and the current passing through 2DJ is recorded as 2DJ current; When the signal light is on, the red light circuit passes through DJ, I DJ is the red light lighting current, then: Red LED damage rate = (I 0H -I DJ )* X% / (I 0H -I X%H ) ; When the signal light is on, the green light circuit passes through DJ, I DJ is the green light lighting current, then: Green LED damage rate = (I 0L -I DJ )* X% / (I 0L -I X%L ) ; When the signal light is on yellow, the yellow light lighting circuit passes through DJ, I DJ is the yellow light lighting current, then: Yellow LED damage rate = (I 0U -I DJ )* X% / (I 0U -I X%U ) When the signal light is in the red and yellow state, the red light lighting circuit passes through DJ, the yellow light lighting circuit passes through 2DJ, and I DJ is the red light lighting current, I 2DJ is the yellow light lighting current, then: Red LED damage rate = (I 0H -I DJ )* X% / (I 0H -I X%H ) Yellow LED damage rate = (I 0U -I 2DJ )* X% / (I 0U -I X%U ) Among them, I 0H ,I 0L ,I 0U Refers to the reference lighting current of the red light, green light and yellow light respectively when the damage rate is 0; the alarm threshold of the filament alarm instrument is set to the lighting current value measured when X% of the LED harness is disconnected, and X% is recorded as the reference damage rate; I X%H ,I X%L ,I X%U Refers to the reference lighting current of the red light, green light and yellow light when the damage rate is X%; I DJ ,I 2DJ They refer to the measured values ​​of DJ current and 2DJ current respectively.

2. The method for calculating the damage rate of LEDs in LED signal machines according to claim 1, characterized in that: The reference damage rate X% is set to 25% or 30%.

3. A device for calculating the damage rate of LEDs in LED signal machines, characterized in that: include: The lighting current acquisition module, the sampling position is at the beginning of the signal lighting circuit, and is used to respectively collect the current passing through the filament relay DJ and the second filament relay 2DJ in the signal lighting circuit in real time, where the current passing through DJ is recorded as I DJ , the current passing through 2DJ is recorded as I 2DJ ; The signal light state monitoring module is used to monitor the current light state of the LED signal. Five signal light states are predefined: off, red, green, yellow, and red and yellow. The LED damage rate calculation module is connected to the lighting current acquisition module and the signal lighting state monitoring module, and is used to calculate the LED damage rate of the corresponding signal lamp position according to the current lighting state of the LED signal; wherein, When the signal light is on, the red light circuit passes through DJ, I DJ is the red light lighting current, then: Red LED damage rate = (I 0H -I DJ )* X% / (I 0H -I X%H ) ; When the signal light is on, the green light circuit passes through DJ, I DJ is the green light lighting current, then: Green LED damage rate = (I 0L -I DJ )* X% / (I 0L -I X%L ) ; When the signal light is on yellow, the yellow light lighting circuit passes through DJ, I DJ is the yellow light lighting current, then: Yellow LED damage rate = (I 0U -I DJ )* X% / (I 0U -I X%U ) ; When the signal light is in the red and yellow state, the red light lighting circuit passes through DJ, the yellow light lighting circuit passes through 2DJ, and I DJ is the red light lighting current, I 2DJ is the yellow light lighting current, then: Red LED damage rate = (I 0H -I DJ )* X% / (I 0H -I X%H ) ; Yellow LED damage rate = (I 0U -I 2DJ )* X% / (I 0U -I X%U ); Among them, I 0H ,I 0L ,I 0U They refer to the reference lighting currents of the red light, green light, and yellow light when the damage rate is 0, respectively, and are written into the configuration file of the LED damage rate calculation module as constant parameters; the alarm threshold of the filament alarm is set to the lighting current value measured when X% of the LED harness is disconnected, and X% is recorded as the reference damage rate, which is written into the configuration file of the LED damage rate calculation module as a constant parameter; I X%H ,I X%L ,I X%U They respectively refer to the reference lighting currents of the red light, green light, and yellow light when the damage rate is X%, and are written into the configuration file of the LED damage rate calculation module as constant parameters.

4. The device for calculating the damage rate of LEDs in LED signal machines according to claim 3, characterized in that: The reference damage rate X% is set to 25% or 30%.

5. An LED signal machine, characterized in that: The LED damage rate of each lamp position of the LED signal is calculated by using the calculation method of the LED damage rate in the LED signal according to any one of claims 1-2.

Images