JP2011126384A - Job-site equipment control device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide, as a method of detecting an erroneous lighting of a signal lamp of a railway LED signal, a method of detecting the erroneous lighting of the signal lamp without depending on a rated current value, because, although a method of detecting with reference to the rated current value, it is necessary to set a reference value for each signal, and in some cases, the erroneous lighting cannot be detected only with reference to the rated current value. <P>SOLUTION: When a job-site equipment control device 2 performs lighting/black signal control of each lighting instrument 31 of the signal 30 by using the characteristics: the ratio in which the current value decreases is lessened with increasing the number of disconnected circuits of an LED element of the LED signal, the voltage applied to the signal lamp, and the current flowing through the signal lamp are periodically measured by a voltage sensor 22 and a current sensor 21, respectively. The erroneous lighting of the signal lamp is detected by imparting an erroneous lighting detection function to a control section 11 from the measured voltage value and current value, by a standard other than the rated current value. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to an apparatus for controlling a railway traffic signal, and more particularly to a technique for detecting erroneous lighting of a signal lamp.

  When a lighting device lighting instruction is output from the field device control device to the traffic light, the signal light is assumed to be resistance R, the voltage applied to the signal light is V, and the current flowing through the signal light is I, I = V / R. The device control device has detected that the signal lamp has been turned on by measuring the current I.

  Therefore, if the lamp that has been instructed to light up is normally lit, the current that flows from the lamp is I1, the lamp that has not been instructed to light is erroneously lit, and the current that flows from the lamp is I2, the field equipment The current I3 measured by the control device is I = I1 + I2.

  Since there is no fluctuation of V and R, I will not fluctuate, so the current I3 measured by the on-site equipment control device always exceeds twice the rated lower limit value. It was detected that a lamp that was not instructed to turn on was accidentally turned on by exceeding twice the rated lower limit.

  The current lamps for railway traffic lights have shifted from the light bulb type to the LED (Light Emitting Diode) type, and even in LED type traffic lights, the rated current value varies depending on the lamps used.

  Patent Document 1 discloses an LED signal lamp control circuit that detects a current value flowing through an LED unit and outputs a light extinguishing command to the open / close control unit when the current value is equal to or less than a predetermined value to prevent the LED from being lit. Has been.

  In Patent Document 2, the current consumption of the traffic light output from the current sensor and the sending end voltage output from the voltage monitoring device are synchronously monitored, the signal side voltage (arrival voltage) is calculated, and the disconnection failure occurs. There is disclosed a failure detection device for a multi-lamp color lamp traffic light that uses an LED as a light source to determine a failure value of a signal light LED by determining a current value (disconnection failure limit value).

JP 2003-179829 A JP 2000-222686 A

  In the conventional technology, if the upper limit value of the current value is within twice the lower limit value, the current value when the lamp that has not been instructed to turn on is accidentally lit exceeds the 2 × rated lower limit value, and the rated upper limit value. Since the value is exceeded, erroneous lighting can be detected without contradiction.

  However, for a lamp with an upper limit of current value exceeding twice the lower limit, even if the lamp is lit accidentally, the current value will exceed 2 x the lower limit of the rating, but it must exceed the upper limit of the rating. Therefore, even if the current value is within the rating, a contradiction occurs in which erroneous lighting is detected, and the current value output from the lamp instructed to turn on is set to 1/2 or more of the rated upper limit value. There is a restriction on the current value adjustment work of the traffic light that must be adjusted to be. For this reason, the method of detecting erroneous lighting of a signal lamp becomes a subject without depending on a rated current value.

The LED traffic light has a plurality of LED element circuits in the lamp, and as a characteristic of the LED traffic light, as shown in FIG. is there. As a result, when the number of disconnection circuits increases when the voltage value is constant, the rate of increase in (voltage value) ² / current value decreases as shown in FIG.

The field device control apparatus of the present invention is provided with a network I / F unit, a control unit, a DO (Digital Output) control unit, a voltage sensor, and a current sensor in the field device control apparatus using the above characteristics, and controls the field device. The device periodically measures the voltage applied to the signal lamp and the current flowing through the signal lamp when lighting / extinction control is performed for each lamp, and from the measured voltage value / current value (voltage value) ² / current The value is calculated by the control unit.

By periodically measuring the voltage and current values, the calculated (voltage value) ² / current value changes each time, so the control unit calculates the rate of change, and the rate of change is the reference When the value is not satisfied, it is detected that a signal lamp not instructed to be lit is erroneously lit. Thereby, the erroneous lighting detection of the signal lamp is performed without depending on the rated current value.

  According to the present invention, as a method of detecting when a signal lamp is erroneously lit, it is possible to detect without using the rated current value of the signal lamp as a reference, and even if traffic lights with different ratings are mixed, the reference value for each signal apparatus is set. Without providing, it is possible to detect erroneous lighting of the traffic light. Furthermore, it is possible to relax the restriction on the current value adjustment work of the traffic light.

FIG. 1 is a diagram showing current characteristics of an LED traffic light. FIG. 2 is a diagram showing the voltage ² / current characteristics of the LED traffic light. FIG. 3 is a diagram showing a system configuration of an example implemented in the present invention. FIG. 4 is a diagram showing a configuration of an on-site equipment control apparatus implemented in the present invention.

  Embodiments of the present invention will be described below.

  FIG. 3 shows a schematic diagram of a system configuration when the present invention is implemented. A plurality of field device control devices 2 are provided for one electronic interlocking device 1 and connected via a network.

  The field device control apparatus 2 includes a network I / F unit 10, a control unit 11, and an I / O unit 12, and can control a plurality of field devices 3 regardless of the type of the field device 3.

  FIG. 4 shows details of the I / O unit 12 of the field device control apparatus 2 when the field device 3 of FIG. 3 is a traffic light 30, and the I / O unit 12 includes a DO control unit 20, a current sensor 21, and a voltage. It has a sensor 22.

  The control unit 11 of the field device control device 2 inputs control information from the electronic interlocking device via the network I / F unit 10, and the DO control unit 20 of the I / O unit 12 is turned on or off from the received control information. Outputs extinction lamp control information.

  In the control information input from the control unit 11, the DO control unit 20 outputs a signal to the lamp 31 of the traffic light 30 connected to the outside when the lighting control is input.

  The current sensor 21 measures the output current from the signal device 30 connected to the outside, and outputs the measured current value to the control unit 11. Further, the voltage sensor 22 measures the voltage of the signal lamp power supply 32 of the traffic light 30 connected to the outside, and outputs the measured voltage value to the control unit 11.

  The control unit 11 inputs a current value and a voltage value from the current sensor 21 and the voltage sensor 22, and if each is out of the control range, the control result is regarded as a current value abnormality or a voltage value abnormality via the network I / F unit 10. And output to the electronic interlocking device 1.

The control unit 11 calculates (voltage value) ² / current value when the current value and the voltage value are within the control ranges, respectively. Note that (voltage value) ² / current value is an impedance value (Z value).

  The voltage sensor 22 and the current sensor 21 periodically measure the voltage value and the current value, and the control unit 11 calculates the impedance value each time. Since the calculated impedance value changes each time, the control unit 11 calculates the variation rate as (Z2 / Z1) × 100, where Z1 is the previously calculated impedance value and Z2 is the currently calculated impedance value.

  When the calculated fluctuation rate does not satisfy the reference value, the control unit 11 detects that the lamp that has not been instructed to turn on is erroneously turned on, and the result is electronically linked via the network I / F unit 10. Output to device 1.

  When the current value and the voltage value are within the control range and the variation rate satisfies the reference value, the control unit 11 determines that the control result is normal and sends the control result to the electronic interlocking device 1 via the network I / F unit 10. Output.

  As described above, as a detection method when the signal lamp is turned on erroneously, it is possible to detect without using the rated current value of the signal lamp as a reference.

DESCRIPTION OF SYMBOLS 1 Electronic interlocking device 2 Field equipment control apparatus 3 Field equipment, such as a signal machine 10 Network I / F part 11 Control part 12 I / O part 20 DO control part 21 Voltage sensor 22 Current sensor 30 Signal machine 31 Signal lamp 32 Signal lamp power supply

Claims (4)

  A field device control apparatus that controls field devices includes a network interface unit, a control unit, and an input / output unit. The input / output unit that controls the traffic signal of the field device includes a digital output control unit and a current An on-site equipment control device having a sensor and a voltage sensor, wherein the control unit has a detection function using a characteristic of an LED element of an LED traffic light with respect to an erroneous lighting detection function of the signal lamp. In the field equipment control device according to claim 1,
The characteristic of the LED element of the LED traffic light is that the rate of increase in the value of (square of voltage value / current value) decreases as the number of disconnection circuits of the LED element increases. Control device. In the field equipment control device according to claim 2,
The current sensor measures an output current from the signal device connected to the outside and outputs a measured current value to the control unit, and the voltage sensor supplies a signal lamp power source of the signal device connected to the outside. , And output the measured voltage value to the control unit,
The said control part calculates the value of (the square of a voltage value / current value) when the said current value and a voltage value are in a control range, respectively, The field device control apparatus characterized by the above-mentioned. In the field equipment control device according to claim 3,
The control unit calculates the rate of change of the calculated value (square of voltage value / current value), and when the calculated rate of change does not satisfy the reference value, a lamp that has not been instructed to turn on has erroneously turned on. And a result of the detection is output to the interlocking device via the network interface unit.

Images