KR20160058260A - Device of displaying velocity for high speed - Google Patents

Abstract

Provided is a speed indicating device for high speed. The speed indicating device for high speed includes: a calculation part to calculate current speed information digitalized on the basis of speed sensor data of a vehicle; a display control part to generate speed displaying data to display a current speed, gradations corresponding to an ambient speed around the same at the present, and a speed corresponding to each gradation; a display part which displays only a part in a total speed range in a digitalized type of LED dot matrix, and displays the speed in gradations corresponding to the speeds together with the current speed and the ambient speed according to the speed display data, and whereon a movement variation rate of the gradations is changed according to an increase and decrease rate of the speed; and a power supply part to supply electricity to the display part. The speed indicating device of the present invention can secure good display for a driver to be able to thoroughly grasp a speed abruptly varying in a short time, as showing a low defective incidence rate.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a high-

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a speed indicating device for a high speed, and more particularly to a speed indicating device mounted on an ultra high speed transportation means such as a high speed train.

All means of transport are equipped with speed indicators to ensure that the operator is operating at the desired speed. Such a speed indicating device is required to measure a more accurate speed in a high speed transportation means than a low speed transportation means. Further, in a high speed transportation means, a variable speed range is very wide, In order to precisely grasp the change in the speed at which the operator changes in a short time, it should be designed so as to have a good visibility for the increase / decrease of the speed indicated by the speed indicating device.

High-speed transportation means that there can be over 270km / h of high-speed trains on the ground and over 700km / h in non-ground areas. Among them, a speed indicating device mounted on a high-speed train drives a servomotor based on analog speed data acquired during traveling of a high-speed train in order to display a speed of up to 300 km to the operator, It provides a current speed to the operator by rotating the speed indication strip analogously to the speed range. Specifically, the speed indicating band divides a distance of 300 km / h into a constant interval, and displays the current speed to the operator through the window.

Since the speed indicating device used in the high-speed train is implemented by rotating the speed indicating band by using the analog method, frequent failures of the servo motor and frequent failures of the speed display device due to the short life of the speed indicating band occur . Particularly, the speed indicator of the analog type continuously causes the failure within 48 months on average. If a speed indicator is faulty on a high-speed train, it notifies the speedometer of a fault on the driving instrument panel, which causes the high-speed train to stop operating on time.

Accordingly, not only the on-time operation of a high-speed train but also the prevention of a large-scale accident, not only the failure occurrence rate is reduced, but also a high speed for ensuring good visibility that the operator can grasp a rapidly changing speed in a short time. Various attempts have been made for indicating devices.

An object of the present invention is to provide a speed indicating device for high speed which can secure a good visibility that can grasp a rapidly varying speed in a short time to the operator while exhibiting a low failure rate.

The objects of the present invention are not limited to the above-mentioned objects, and other objects not mentioned can be clearly understood by those skilled in the art from the following description.

According to an aspect of the present invention, there is provided a speed instruction apparatus for high speed, comprising: an operation unit for calculating current speed information digitized based on speed sensor data of a vehicle; A display control unit for generating speed display data for displaying speeds corresponding to the respective graduations and the scales corresponding to the peripheral speed in the vicinity thereof, and a display control unit for displaying only a part of the entire speed range in the digitized form of the LED dot matrix A display unit for displaying the current speed and the peripheral speed according to the speed display data and a scale corresponding to the speeds and varying the rate of movement of the scale according to the rate of change of the speed, A power supply unit for supplying power to the display control unit and the display unit It should.

In another embodiment, the display unit further includes an abnormality display unit for notifying the current speed display unit only indicating the current speed, the abnormality error between the speed information and the speed display data, and the power source abnormality of the power source unit, And the intervals of the scales can be controlled to be displayed at 3 mm or more.

In yet another embodiment, the apparatus may further include a diagnostic unit for detecting rapid acceleration of the vehicle, stopping the vehicle, an error between the speed information and the speed display data, and a power source abnormality of the power source unit. In addition, a preliminary operation unit that replaces the current speed information digitized based on the speed sensor data of the vehicle with the operation unit, and a preliminary operation unit that supplies power to the display control unit and the display unit through the preliminary operation unit, And a power supply unit. In this case, when the diagnostic unit detects at least one of an error between the speed information and the speed display data and a power source error of the power source unit, the diagnosis unit may select and switch the preliminary operation unit and the spare power source unit have.

In another embodiment, the operation unit may include a first filter unit receiving the first speed sensor data of the first axis, which is the speed sensor data, and outputting the first sensor data with noise removed, A first pulse generator for generating first modulation pulse data having a frequency modulated to correspond to the speed, a first high frequency filter for generating first high frequency spread data of a predetermined frequency or higher from the first modulation pulse data, A duty setting / pulse counting unit for counting the number of pulses of the first correction pulse data calculated by correcting the pulse duty of the first high frequency pulse data; And a processing unit for generating speed information.

In addition, the operation unit may include a second filter unit receiving the second velocity sensor data of the second axle at a position different from the first axis, and outputting the second sensor data with the noise removed, A second high frequency filter unit for generating second high frequency spread data of a predetermined frequency or more from the second modulated pulse data, Frequency pulse data, which is generated by correcting the pulse duty of the second high-frequency pulse data, is counted, and the second correction pulse data is converted into a voltage value, And may further include a conversion unit.

The processor may generate the speed information based on the first correction pulse data when the difference between the pulse numbers of the first and second correction pulse data is equal to or less than a predetermined threshold value, The speed information can be generated based on the average of the correction pulse data.

In addition, the first and second velocity sensor data may be calculated from the tachometer installed on the first and second axles, respectively.

The apparatus may further include a diagnosing unit for detecting an error between the speed information and the speed display data, wherein the speed information is obtained by converting the second correction pulse data to a voltage value, using exchange-voltage conversion data, It can be determined whether the error between the speed display data belongs to the tolerance.

In another embodiment, the power supply unit may include a noise filter unit that receives an external voltage and removes noise of the external voltage, a traction filter that removes a ripple voltage from the noise-removed external voltage, And a voltage converting unit for adjusting an external voltage from which the ripple voltage is removed to a voltage supplied to the operation unit, the display control unit, and the display unit to generate an operation voltage. In addition, the diagnosis unit may further include a diagnosis unit for detecting a power supply failure of the power supply unit. The diagnosis unit may determine whether the noise-removed external voltage and the external voltage from which the ripple voltage has been removed are within a permissible range of the voltage, Can be detected.

The details of other embodiments are included in the detailed description and drawings.

According to the present invention, a display unit for displaying a digitized form of an LED dot matrix exhibits a low defect occurrence ratio as compared with a conventional analog type speed indicating apparatus employing a speed indicating band, The speed of movement of the scale is varied according to the rate of change of the speed so that the speed of the scale is changed in accordance with the current speed and the peripheral speed in the vicinity of the whole speed range and the scale corresponding to the speeds, It is possible to secure good visibility that can be grasped even with respect to the speed at which the motor is driven.

According to the present invention, an abnormal error between the speed information and the speed display data and a power source abnormality of the power source unit are detected by the diagnosis unit and the operation unit and the power source unit are switched from the power source unit to the spare operation unit and the spare power source, By providing a power source, it is possible to reduce the occurrence of faults and accidents in preparation for an unexpected failure.

The speed information is generated based on one of the pulse data when the difference between the pulse data each calculated from the first and second speed sensor data obtained from different axles is equal to or less than a predetermined threshold value, By generating the speed information based on the average, a more accurate speed is calculated in consideration of the sliding phenomenon for each axle due to the slip due to the state of the rail on which the high-speed train travels or the axle lock due to rapid braking can do.

1 is a block diagram of a speed indicating apparatus for high speed according to an embodiment of the present invention.
2 is an exemplary configuration diagram of a tachometer for calculating first and second velocity sensor data.
3 is a block diagram of the calculation unit.
4 is a block diagram of the power supply unit.
5 is a block diagram of the display control unit.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings and the following description. However, the present invention is not limited to the embodiments described herein but may be embodied in other forms. Rather, the embodiments disclosed herein are being provided so that this disclosure will be thorough and complete, and will fully convey the concept of the invention to those skilled in the art. Like reference numerals designate like elements throughout the specification. It is to be understood that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. In the present specification, the singular form includes plural forms unless otherwise specified in the specification. &Quot; comprises "and / or" comprising ", as used herein, unless the recited element, step, operation, and / Or additions.

Hereinafter, a speed indicating apparatus for high speed according to an embodiment of the present invention will be described in detail with reference to FIGS. 1 to 5. FIG. 1 is a block diagram of a speed indicating apparatus for high speed according to an embodiment of the present invention. Fig. 2 is an exemplary configuration diagram of a tachometer for calculating first and second speed sensor data, and Fig. 3 is a block diagram of an operation section. 4 is a block diagram of the power supply unit, and Fig. 5 is a block diagram of the display control unit.

 The high-speed speed indicating device 100 is a speed display device applicable to the high-speed train shown in Fig. 2, and calculates the current speed information digitized based on the first and second speed sensor data of the vehicle (high-speed train) And a power supply unit 120 for supplying power to the display control unit 140 and the display unit 150 through the operation unit 110, the display control unit 140, the display unit 150, and the operation unit 110. The speed instruction device 100 for high speed may further include a selection unit 130, a diagnosis unit 160, a preliminary operation unit 170, and a standby power unit 180.

The first and second velocity sensor data may be calculated from the tachometers 190 and 192 provided on the first and second axles, respectively, which are different from each other. The tachometers 190 and 192 generate pulse signals up to the maximum speed that can be output from the high speed railroad, and the pulse signals can be generated by, for example, adding the proportional rate of 10 Hz per 1 Km to the fundamental frequency of 80 Hz, The corresponding frequency may be 3880 Hz.

The first and second axles, in which the tachers 190 and 192 are installed, may be wheels that are all powered directly, or alternatively are wheels that receive power directly into only one of the first and second axles, It can be a non-received driven wheel. The reason why the first and second speed sensor data, which are basic data for calculating the speed information, is obtained separately. When an abnormal situation such as slip occurs on the axle on which the tachometers 190 and 192 are installed due to rain or other reasons There is a limitation in performing accurate speed calculation. More specifically, when the slip phenomenon occurs due to idling of the axle caused by moisture or the like formed on the rail, a speed faster than the actual speed of the vehicle may be measured. In addition, when a sliding phenomenon occurs due to locking of the axle due to a braking operation or the like while the vehicle is running, a speed slower than the actual speed of the vehicle is measured. Such an error between the actual speed and the measured speed of the vehicle causes a decrease in the accuracy of the stopping of the automatic stop of the high-speed train, which is a risk factor for the safe operation. Therefore, it is preferable to acquire respective velocity sensor data on separate axles to measure velocities close to the actual velocities.

3, the operation unit 110 includes a first filter unit 111, a first pulse generation unit 112, a first high frequency filter unit 113, and a duty setting / pulse count unit 114 .

The first filter unit 111 receives the first speed sensor data and outputs the noise-removed first sensor data. Specifically, the first speed sensor data reflects the instantaneous speed change of the first axis, and unnecessary noise may be included in the speed calculation, so that unnecessary noise is removed.

The first pulse generator 112 generates first modulated pulse data having a modulated frequency corresponding to the real time speed based on the first sensor data. The first sensor data is generated as a pulse signal of 3880 Hz, which is a frequency range of the first speed sensor data, and modulated into a high frequency suitable for processing processing for digitizing data in a subsequent module to generate first modulated pulse data.

The first high-frequency filter unit 113 generates first high-frequency pulse data of a predetermined frequency or more from the first modulation pulse data. Although the first modulation pulse data is a high frequency signal in a form suitable for digital processing, generating the first high frequency pulse data corresponding to an effective frequency is effective for eliminating a temporal low frequency signal still remaining at a rapidly changing speed in real time to be.

The duty setting / pulse counting unit 114 counts the number of pulses of the first correction pulse data calculated by correcting the pulse duty of the first high frequency pulse data. The pulse duty that is each pulse width of the first high frequency pulse data is finally adjusted to the same width at the same width to generate the first correction pulse data so as to contribute to accurate speed information measurement at the time of counting the number of pulses.

The operation unit 110 includes a second filter unit 115 for receiving the second speed sensor data and outputting the second sensor data with the noise removed, a second filter unit 115 for receiving the second speed sensor data and having the modulated frequency corresponding to the real- A second high frequency wave generating unit 116 for generating second high frequency modulated pulse data from the second modulated pulse data and a second high frequency And a filter unit 117 may be provided. The functions and operations of the second filter unit 115, the second pulse generation unit 116 and the second high frequency filter unit 117 are the same as those of the first filter unit 111, the first pulse generation unit 112, 1 < / RTI >

The operation unit 110 may include a frequency voltage conversion unit 160 for counting the number of pulses of the second correction pulse data calculated by correcting the pulse duty of the second high frequency pulse data. Is the same as the first duty setting / pulse counting unit 114. In addition, the frequency-to-voltage converter 160 converts the second correction pulse data into a voltage value and generates exchange-voltage-converted data. The frequency-voltage converter 160 converts the voltage- (160).

The arithmetic unit 110 generates current velocity information digitized based on the first correction pulse data when the difference between the number of pulses of the first and second correction pulse data is equal to or less than a predetermined threshold value, It is possible to generate the digitized current velocity information based on the average of the correction pulse data and transmit the generated velocity information to the display control unit 140 through the selection unit 130. [

As in the present embodiment, when the difference between the pulse data calculated from the first and second velocity sensor data obtained from different axles is equal to or smaller than a predetermined threshold value, the velocity information is calculated based on the first correction pulse data Or by generating a speed information based on the average of the first and second correction pulse data to thereby generate a slip or a slip for each axle due to a slip due to the state of the rail on which the high- It is possible to calculate a more accurate speed considering the phenomenon.

4, the power supply unit 120 supplies power to the display control unit 140 and the display unit 150 through the operation unit 110 and supplies power to the noise filter unit 122, the traction filter 124, And a triggering filter 128 for reprocessing the operating voltage output from the converting unit 126 and the voltage converting unit 126 and distributing the operating voltage to the calculating unit 110, the display control unit 140, and the display unit 150 .

The noise filter unit 122 receives an external voltage, for example, a DC voltage of 76 V, and removes noise of the external voltage. In the case of a high-speed train, the voltage supplied from the rail and the upper power supply line spaced apart from the train is somewhat uneven, so that the noise filter unit 122 can remove the uneven component voltage and maintain the rated voltage.

The traction filter 124 may have a momentary ripple voltage when the wheel enters the rail again at the cut spaced apart portion of the rail and this ripple voltage may be applied to the module of the high speed speed indicating device 100 The ripple voltage is removed from the noise-removed external voltage.

The voltage converting unit 126 generates an operating voltage by adjusting an external voltage from which the ripple voltage is removed to a voltage supplied to the operation unit 110, the display control unit 140, and the display unit 150, The operating voltage can be generated.

5, the display control unit 140 may include an interface 142 for a communication protocol with the operation unit 110, a shift register 144, and a drive unit 146. [

Based on the speed information output from the arithmetic unit 110, the shift register 144 outputs, in real time, the scales corresponding to the current speed and the peripheral speed near the current speed and the speed display data for displaying the speed corresponding to each of them . The calculation unit 110 calculates only the current speed in real time and therefore the shift register 144 can display the current speed up to the range that can be displayed on the speed display window 152 of the display unit 150, And generates data for displaying the peripheral speed. The shift register 144 may also be configured to output data for displaying the gradual fast or slow scale movement mode on the display unit 150 in real time in order to interlock the movement of the scale of the speed display window 152 in accordance with the rate of change of the speed .

The drive unit 146 reprocesses the speed display data in a form suitable for the dot matrix size of the speed display window 152 and provides the display 150 with the reprocessed speed display data in accordance with the operation clock frequency.

The display unit 150 may include a speed display window 152, a current speed display unit 154, and an anomaly display unit 156.

The speed display window 152 displays only a part of the entire speed range in the digitized form of the LED dot matrix and displays the current speed and the peripheral speed according to the speed display data together with the scale corresponding to these speeds, The rate of change of the graduation of movement of the scale is changed by the rate of change of the speed by the shift register 144.

The speed display window 152 displays a scale of 300 Km / h in a space of 150 mm in a space of 3 mm or more so that the speed change rate can be grasped visually even in the case of a rapid change of the speed, and the LED dot matrix is 20X20 Or more LED dots.

The current speed display unit 154 may display only the current speed only in numerals and the abnormality display unit 156 may notify the rapid acceleration of the vehicle, the stopping of the vehicle, the error between the speed information and the speed display data, .

As in the present embodiment, the speed display window 152 for displaying in the digitized form of the LED dot matrix exhibits a low defect occurrence rate as compared with the conventional analog type employing the speed display band, By implementing the above-described configuration, operation, and function of the speed display window 152, it is possible to secure good visibility that allows the operator to grasp the rapidly changing speed in a short time, as compared with the case where only the current speed display section 154 is mounted .

Referring to FIG. 1 again, the diagnosis unit 160 may detect a sudden acceleration of the vehicle, an emergency stop, an error between the speed information of the operation unit 110 and the speed display data of the display control unit 140, And notifies the operator to the abnormal display window 156 so as to cope with the abnormal situation. In addition, the high-speed speed indicating apparatus 100 can maintain the normal operation even under abnormal conditions, thereby contributing to prevention of train delay and safe driving do.

The diagnosis unit 160 detects an abnormality and is connected to the operation unit 110 and the display control unit 140 by the selection unit 130. The spare operation unit 170 and the spare power unit 180 Is provided.

The preliminary arithmetic section 170 performs arithmetic operation of the current speed information digitized based on the first and second speed sensor data of the vehicle by the arithmetic section 110 and the preliminary power supply section 180 The control unit 140 and the display unit 150 may be replaced with power. The preliminary operation unit 170 and the preliminary power supply unit 180 are designed to have substantially the same configuration as that of the operation unit 110 and the power supply unit 120 described above.

In order for the diagnosis unit 160 to detect an error between the speed information and the speed display data, the speed information is converted from the voltage conversion data output from the frequency / voltage converter 118, more specifically, Conversion data. The diagnosis unit 160 can determine whether or not the error between the voltage conversion data and the current speed belonging to the speed display data falls within the tolerance.

The diagnosis unit 160 transmits the switching signal to the selection unit 130 and connects the spare operation unit 170 and the spare power supply unit 180 to the display control unit 140. [

The external voltage from which noise has been removed from the noise filter unit 122 and the external voltage from which the ripple voltage has been removed from the traction filter 124 are allowed to be permitted to be detected by the diagnosis unit 160, It is possible to judge whether or not it belongs to the range and to detect the power supply abnormality.

The diagnosis unit 160 transmits the switching signal to the selection unit 130 and connects the spare operation unit 170 and the spare power supply unit 180 to the display control unit 140. [

This embodiment illustrates that the diagnosis unit 160 automatically switches to the preliminary operation unit 170 and the spare power unit 180 when detecting at least one of the error between the speed information and the speed display data and the power source error of the power source unit The diagnosis unit 160 notifies the abnormality detection through the error display window 156 so that the operator can activate at least one of the preparatory operation unit 170 and the spare power supply unit 180 .

In the present embodiment, the diagnosis unit 160 switches to the preliminary operation unit 170 and the redundant power supply unit 180 according to a result of detecting an error between the actual speed and the displayed speed and a power supply abnormality, It is possible to reduce the occurrence of faults and accidents in preparation for an unexpected failure.

In the meantime, although the speed indicating device applied to a high-speed train has been described in the present embodiment, the present embodiment can also be applied to a high-speed transport device for measuring a wide range of speeds, for example, an aircraft.

Components constituting the speed indicating apparatus for high speed 100 shown in Figs. 1 to 5 or the like can be recorded on a computer-readable recording medium in the form of a program realizing the function. Here, the computer-readable recording medium refers to a recording medium that can be read by a computer by accumulating information such as data and programs by electric, magnetic, optical, mechanical, or chemical action. Examples of such a recording medium that can be detached from a computer include a flexible disk, a magneto-optical disk, a CD-ROM, a CD-R / W, a DVD, a DAT, and a memory card. In addition, a hard disk, a ROM, or the like is used as a recording medium fixed to a computer.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is clearly understood that the same is by way of illustration and example only and is not to be taken by way of limitation, I will understand. Therefore, the scope of the present invention should not be limited to the above-described embodiments, but should be determined by all changes or modifications derived from the scope of the appended claims and the appended claims.

100: High speed instruction device 110:
120: Power supply unit 130:
140: display control unit 150:
160: Diagnosis unit 170:
180:

Claims (10)

An arithmetic unit for calculating the current speed information digitized based on the speed sensor data of the vehicle;
A display control unit for generating speed display data for displaying scales corresponding to a current speed and a current peripheral speed around the current speed and a speed corresponding to each of the scales based on the speed information;
Displays only a part of the entire speed range in the digitized form of the LED dot matrix and displays the current speed and the peripheral speed together with the graduations corresponding to the speeds according to the speed display data, A display unit in which a rate of change of the movement of the scale varies according to a change rate of change; And
And a power supply unit for supplying power to the display control unit and the display unit through the operation unit. The method according to claim 1,
Wherein the display unit comprises: a current speed display unit that displays only the current speed; And
Further comprising an abnormality display unit for notifying a rapid acceleration of the vehicle, a stopping of the vehicle, an error between the speed information and the speed display data, and a power supply abnormality of the power supply unit,
And the intervals of the graduations are controlled to be displayed at 3 mm or more. The method according to claim 1,
Further comprising a diagnostic unit for detecting a rapid acceleration of the vehicle, a stopping of the vehicle, an error between the speed information and the speed display data, and a power source abnormality of the power source unit. The method of claim 3,
A preliminary operation unit for replacing and digitizing the current speed information digitized based on the speed sensor data of the vehicle by the operation unit; And
And a spare power supply unit for supplying power to the display control unit and the display unit in place of the power supply unit through the preliminary operation unit,
Wherein the diagnostic unit detects at least one of an error between the speed information and the speed display data and a power source error of the power source unit by the diagnosis unit, . The method according to claim 1,
Wherein the operation unit comprises: a first filter unit receiving the first speed sensor data of the first axis, which is the speed sensor data, and outputting the first sensor data with the noise removed;
A first pulse generator for generating first modulation pulse data having a frequency modulated corresponding to the speed based on the first sensor data;
A first high-frequency filter unit for generating first high-frequency wave data of a predetermined frequency or higher from the first modulation pulse data;
A duty setting / pulse counting unit for counting the number of pulses of the first correction pulse data calculated by correcting the pulse duty of the first high frequency pulse data; And
And a processing section for generating the speed information from the number of pulses counted from the first correction pulse data. 6. The method of claim 5,
A second filter unit for receiving second speed sensor data of a second axle at a position different from the first axis and outputting second noise sensor data;
A second pulse generator for generating second modulation pulse data having a frequency modulated corresponding to the velocity based on the second sensor data;
A second high-frequency filter unit for generating second high-frequency wave data of a predetermined frequency or higher from the second modulated pulse data; And
Frequency pulse data, which is generated by correcting the pulse duty of the second high-frequency pulse data, is counted, and the second correction pulse data is converted into a voltage value, Further comprising a conversion unit,
Wherein the processing unit generates the speed information based on the first correction pulse data when the difference between the number of pulses of the first and second correction pulse data is equal to or less than a predetermined threshold value, And generates the speed information based on an average of the data. The method according to claim 6,
Wherein the first and second velocity sensor data are calculated from a tachometer provided on the first and second axles, respectively. The method according to claim 6,
Further comprising a diagnostic unit for detecting an error between the speed information and the speed display data,
Wherein the speed information uses exchange conversion data that converts the second correction pulse data to a voltage value and determines whether an error between the voltage conversion data and the speed display data falls within a tolerance. The method according to claim 1,
Wherein the power supply unit includes: a noise filter unit that receives an external voltage and removes noise of the external voltage;
A traction filter for removing a ripple voltage from the noise-removed external voltage; And
And a voltage conversion unit for adjusting an external voltage from which the ripple voltage is removed to a voltage supplied to the operation unit, the display control unit, and the display unit to generate an operation voltage. Further comprising a diagnosing unit for detecting a power source abnormality of the power source unit,
Wherein the diagnosis unit determines whether or not the noise-removed external voltage and the external voltage from which the ripple voltage has been removed fall within a permissible range of the voltage to detect a power supply abnormality.

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