JP5653677B2 - Breaking breakage detector for level crossing breaker - Google Patents

Description

  The present invention relates to a breakage breakage detecting device for a level crossing breaker.

  Conventionally, in a railroad crossing breaker, breakage of the cut off mainly by an automobile has frequently occurred. This occurs, for example, when an automobile attempts to forcibly pass through a railroad crossing just before the completion of the lowering of the shield or to escape from within a railroad crossed by the barrier. Such breakage of the breaker is very dangerous because the function of preventing entry to the level crossing is lost, so it must be detected promptly.

In order to detect the breakage of the breaker, there is a technique that uses current data of an electric motor that operates the breaker.
In the apparatus described in Patent Document 1, a linear statistic of time series data of motor current is calculated to obtain a total value of the linear statistic, and a trajectory parallel measure is calculated based on the time series data. To calculate the nonlinear statistic, determine the average value of the nonlinear statistic, plot the total value of the linear statistic and the average value of the nonlinear statistic in the two-dimensional space as evaluation functions, respectively, The region formed by the above is defined as a normal area. After that, every time the breaker operates, current data when the breaker operates is collected, the total value of the linear statistics and the average value of the nonlinear statistics are obtained, and the points plotted in the two-dimensional space are If it exists outside the normal area, it is determined that the blockage is broken.

JP 2008-290549 A

However, in the invention described in Patent Document 1, it is necessary to accumulate a large amount of time-series data of the motor current in order to determine a normal area. If the number of accumulated data is small, the detection accuracy decreases, and a certain degree of detection If the number of accumulated data is increased in order to obtain accuracy, it takes time to collect data.
In the invention described in Patent Document 1, parameters such as “orbit parallel measure” are difficult for the user to understand, so it is difficult to understand the introduction and it is difficult to provide items to be set by the user.
In addition, the breakage of the breaker is not only a complete breakage where all of the breakers are taken away, but also a partial breakage that is partially taken away from any part, and a hanging breakage that hangs while the tip is connected from the broken part. There are a variety of situations, all of which should be detected.
However, in the prior art, there is a case where erroneous detection of determining normality as abnormal or abnormal as normal occurs, and there still remains a problem of improving the accuracy of detection of breaking breakage.

  The present invention has been made in view of the above problems in the prior art, and accurately detects the presence or absence of breakage when detecting breakage of the breaker based on current data of an electric motor that operates the breaker. An object of the present invention is to provide a breakage breakage detecting device for a level crossing breaker capable of performing the above.

The invention according to claim 1 for solving the above-mentioned problem is a breakage breakage detecting device for a level crossing cutting machine that cuts off a road intersecting with a railroad by a breaker operated by an electric motor in front of the level crossing.
A data collection unit that collects time-series data of the current value of the electric motor when the cutoff operation moves upward from a substantially horizontal position to a substantially vertical position;
An approximate calculation unit for calculating an approximate function of the time series data;
A database unit that stores the approximate function calculated by the approximate calculation unit in association with individual identification information for cutting, and
Whether or not the value of the approximate function calculated each time the cutoff can be lifted deviates from the judgment allowable range at the time of a predetermined judgment reference belonging to the section in which the cutoff lift moves from the substantially horizontal position to the substantially vertical position A breakage breakage detecting device for a level crossing breaker, comprising: an abnormality determination unit for determining breakage of the breaker.

According to a second aspect of the present invention, the approximate calculation unit includes:
Upon receiving the input of the time series data, a maximum value detection unit that detects a maximum value from the electric motor current excluding the starting current of the electric motor in the time series data;
A fitting section setting unit that sets a time that is a predetermined current value from the time-series data in a range before or after the time when the maximum value detected by the maximum value detecting unit is set as a fitting section start point;
The breakage breakage detection device for a level crossing breaker according to claim 1, wherein the approximate function is calculated for the time series data in a range from the fitting section start point to the point at which collection is stopped. is there.

  According to a third aspect of the present invention, the database unit includes a determination result each time when the determination by the abnormality determination unit is performed, the time-series data at the time of the ascending operation of the blocking device, and The information for determining the approximate function is stored in association with the time at which the cutting operation is lifted, and the breaking / breaking detection device for a crossing cutting machine according to claim 1 or 2.

The invention according to claim 4 is a display means for displaying the approximate function read from the database unit;
The breaking breakage detecting device for a level crossing breaker according to any one of claims 1 to 3, further comprising setting means for allowing an operator to set the allowable determination range.

  According to a fifth aspect of the present invention, the database section is moved up every time the length of the crossing cutting machine is cut off in an actual use state in which accessories such as a normal cutting machine that is not broken and a breakage preventer are attached. A determination allowable range set based on an approximate function calculated based on the electric current of the electric motor at the time when the electric motor is operated and an approximate function group obtained by repeating a plurality of ascending operations under the same condition is stored. The breaking breakage detecting device for a level crossing breaker according to any one of claims 1 to 4.

In the invention described in claim 6, the abnormality determination unit compares the value of the determination allowable range at the same time point with the approximate value of the electric current value of the electric motor at a predetermined position when the cutoff is raised, and deviates from the value of the determination allowable range. The breakage breakage detecting device for a level crossing breaker according to any one of claims 1 to 5, wherein the breakage determination is performed by detecting the occurrence of breakage.

In the seventh aspect of the invention, the abnormality determination unit compares the value of the determination allowable range at the time when the cutoff position is almost horizontal and the approximate value of the current value of the electric motor at the same time, thereby breaking the breakage. 7. The breakage breakage detecting device for a level crossing breaker according to any one of claims 1 to 6, wherein the determination is performed.

  The invention according to claim 8 is the railroad crossing machine according to any one of claims 1 to 7, wherein the railroad crossing machine is a railroad crossing machine that does not have a balance weight and a balance assist mechanism. This is a breakage breakage detection device for a breaker.

  According to the present invention, the approximate function of the time series data is obtained by collecting the current values of the respective electric motors as time series data when the leveling machine used by installing the railroad crossing machine is raised a plurality of times. Calculating and referring to a judgment allowable range that is set in advance based on an approximate function group consisting of a plurality of approximate functions at normal time, the approximate function during actual operation deviates from the judgment allowable range at a predetermined judgment reference time. The breakage of the blockage is determined depending on whether or not to do so. The approximation function reveals the difference in the time series change of the motor current due to the presence or absence of breakage and the breakage situation, and not only the setting of the judgment tolerance range, but also the detection accuracy of the breakage can be pursued by selection at the judgment reference time. There is an effect that it can be determined accurately.

1 is a configuration block diagram of a railroad crossing breaker and a breaking breakage detection device according to an embodiment of the present invention. It is a graph which shows an example of the time series data of the motor electric current when carrying out the raising operation | movement of three cutoffs from which length differs from a horizontal position to a vertical position, respectively. FIG. 3 is a graph in which approximate functions of the linear functions are superimposed and displayed on the fitting interval of each time series data shown in FIG. 2. A graph showing an example of a time series data group of motor currents when the same length of the cutting cutter is repeatedly raised from the horizontal position to the vertical position, and an approximate function group by a linear function of these time series data are superimposed. It is the displayed graph. FIG. 3 is a graph in which approximate functions of these quadratic functions are superimposed and displayed on the fitting interval of each time series data shown in FIG. 2. FIG. 5 is a graph showing an upper threshold value and a lower threshold value that divide an example region in which an approximate function group by a linear function of the graph of FIG.

  An embodiment of the present invention will be described below with reference to the drawings. The following is one embodiment of the present invention and does not limit the present invention.

  As shown in FIG. 1, the breakage breakage detecting device 2 of the present embodiment connected to the railroad crossing breaker 1 includes a data collection unit 3, an approximate calculation unit 4, a database unit 5, an abnormality determination unit 6, and a cutoff. A length setting switch 7 is provided on the main body, and a setting / monitoring portion 9 is detachably connected to the main body via a connector 8.

  The level crossing cutting machine 1 holds the cutting bar on a horizontal rotation shaft, and moves the cutting bar up and down from the horizontal position to the vertical position and from the vertical position to the horizontal position by an electric motor.

The data collection unit 3 receives input of a motor current, a lift start signal, and a lift stop signal from the railroad crossing breaker 1.
The data collection unit 3 includes a current sensor 31, an A / D converter 32, a data storage unit 33, and a clock 34.
When receiving the rise start signal, the data collection unit 3 starts measuring the motor current and collecting time series data. That is, the data collection unit 3 performs A / D conversion on the current value detected by the current sensor 31 by the A / D converter 32 and sequentially stores the current value in association with the time engraved by the clock 34 so that the motor current is obtained. Series data is generated and stored in the data storage unit 33.
When the data collection unit 3 receives the rise stop signal, the data collection unit 3 completes the time series data related to the one rise operation signal, and outputs the time series data to the approximate calculation unit 4.

The approximate calculation unit 4 receives the time series data input from the data collection unit 3.
The approximate calculation unit 4 includes a maximum value detection unit 41, a fitting section determination unit 42, and an approximate expression calculation unit 43.
When the approximate calculation unit 4 receives input of time series data, first, the maximum value detection unit 41 detects the maximum value from the motor current excluding the motor start current in the time series data. That is, the maximum value detection unit 41 specifies the maximum value of the motor current excluding the motor start current and the time when the maximum value is reached.
Next, the fitting section determination unit 42 sets the time when the current value determined between 10% to 100% of the maximum value is set from the time series data in the range before or after the time when the maximum value is reached. This is the fitting section start point. Since the setting between 10% and 100% of the maximum value is stored in the database unit 5 in advance, the fitting section determination unit 42 refers to this.
Next, the approximate expression calculation unit 43 applies the approximate expression using a method such as a least square method of a linear function, a quadratic function, a cubic function or the like to time series data in the range from the fitting section start point to the measurement stop. To determine an approximate expression, that is, calculate an approximate function.
Information for determining the time series data and its approximate expression is stored in the database unit 5 in association with the individual identification information of the cutoff. The information for determining the approximate expression corresponds to the type of function and its coefficient and constant.

The setting / monitoring unit 9 includes an input device for inputting an operation signal from an operator and a display monitor. That is, the setting / monitoring unit 9 constitutes setting means and display means.
In accordance with a request input from the setting / monitoring unit 9, the breaking / breaking breakage detecting device 2 reads information for determining an approximate expression related to the request from the database unit 5, recalculates an approximation function, and sends it to the setting / monitoring unit 9. Display the approximate function as a graph. The breakage breakage detecting device 2 displays a plurality of approximate functions in a graph by making it possible to distinguish between an approximate function at normal time and an approximate function at abnormal time by color coding or the like. Further, the breakage breakage detecting device 2 displays time-series data in a graph on the setting / monitoring unit 9 in accordance with a request input from the setting / monitoring unit 9.
Further, the breakage breakage detecting device 2 receives a setting allowable range setting input and a setting change input from the setting / monitoring unit 9 and stores them in the database unit 5 in association with the individual identification information of the breaking. The database unit 5 accumulates the change history of the determination allowable range, and outputs the final determination allowable range to the abnormality determination unit 6. Note that the determination allowable range at the time of the determination reference is a setting target. At the judgment reference time, it is possible to select and set a time point at which it is easy to judge from the section from the horizontal time to the vertical time.
Further, the breakage breakage detecting device 2 receives the setting change input of the above-described approximate expression fitting section from the setting / monitoring unit 9 and stores it in the database unit 5.

  The cutoff length setting switch 7 inputs the cutoff length setting to the abnormality determination unit 6 in accordance with the operation of the operator. The operator operates the cutoff length setting switch 7 to set and input the cutoff length installed in the railroad crossing cutting machine 1. The function of the cutoff length setting switch 7 may be realized in the setting / monitoring unit 9 described above.

The abnormality determination unit 6 includes an approximate value calculation unit 61, a determination unit 62, and an allowable range storage unit 63.
The abnormality determination unit 6 identifies the individual identification information of the cutoff according to the setting input from the cutoff length setting switch 7, reads the determination allowable range from the database unit 5, and stores it in the allowable range storage unit 63.
After the necessary setting is completed, the determination function of the abnormality determination unit 6 is validated.
In the abnormality determination unit 6 in which the determination function is validated, the approximate value calculation unit 61 determines the approximate expression determined by the approximate calculation unit 4 for the time-series data related to the upward movement for each upward movement of the cutoff operation. The reference time is input, the approximate value of the motor current at the determination reference time is calculated, and output to the determination unit 62.
When receiving the approximate value from the approximate value calculation unit 61, the determination unit 62 reads the determination allowable range from the allowable range storage unit 63, and breaks the cutting depending on whether the approximate value deviates from the determination allowable range. Determine. That is, the determination unit 62 determines that the approximate value is normal if the value is within the determination allowable range, determines that the approximate value is outside the determination allowable range, determines breakage, and outputs a determination signal to the outside.
Whenever the determination by the determination unit 62 is made, the database unit 5 displays the determination result, the time series data at the time of the ascending operation of the cutting target to be determined, and information for determining the approximate expression thereof. Store and store in association with the time.

Next, the breakage breakage detecting device 2 of the present embodiment will be described again with reference to the graphs of FIGS.
The main purpose is to reduce the load on the motor that raises and lowers the cutting wheel. The balance weight attached to the rear edge of the cutting wheel on the rear end side of the cutting wheel rotation shaft and auxiliary force to the cutting rotation shaft are input. An auxiliary mechanism such as a spring is used.
The data shown in FIG. 2 to FIG. 5 is a case where the railroad crossing breaker 1 is a railroad crossing barrier without a balance weight and an auxiliary mechanism. A level crossing machine without a balance weight or auxiliary mechanism has a higher motor load than a level crossing machine with a balance weight or auxiliary mechanism, so the reduction ratio of the reduction mechanism that transmits the motor power to the rotary shaft is high. Largely set and realized.
Also, when there is no balance weight or auxiliary mechanism, the lifting load is increased from the horizontal level to the vertical level. The initial load torque during the driving period is significantly larger than the final load torque, so the vertical direction when the vertical level is switched off. Shows a tendency that the motor current gradually decreases while fluctuating. The breakage breakage detecting device of the present invention can be particularly suitably applied to a crossing breaker having such a tendency.

FIG. 2 is a graph showing time series data of the motor current when the three cutoffs having different lengths are moved up from the horizontal position to the vertical position, respectively. As shown in FIG. 2, the motor current tends to gradually decrease as a whole while finely increasing and decreasing. Of the three, the time series data V1 is the longest cutoff data, the time series data V2 is an intermediate length, and the time series data V3 is the shortest cutoff data.
The data collection unit 3 collects time series data as shown in FIG. 2 and outputs it to the approximate calculation unit 4.

FIG. 3 also shows time-series data V1, V2, and V3. However, only the data in the fitting section determined by the fitting section determination unit 42 is displayed.
FIG. 3 shows an example in which the time that is approximately 80% of the maximum value from the time series data in the range before the time when the maximum value is set as the fitting section start point, and the range from the fitting section start point to the measurement stop is shown. It is a fitting section. In the case of a level crossing breaker that shows a tendency for the motor current to fluctuate gradually as it rises from horizontal to vertical, the maximum value of the electric motor is calculated from the data excluding the starting current of the electric motor. By detecting and calculating an approximate function for the time series data in the range after the time when the current value is set between ± 20% including the maximum value, it is possible to detect the breaking breakage satisfactorily. is there.
Next, the approximate expression calculation unit 43 performs the approximation by the least square method of the approximate expression using a linear function to the time series data V1 of the fit interval to determine the approximate expression, that is, as shown in the graph of FIG. An approximate function V1a is calculated.
Similarly, an approximate function V2a is calculated for the time series data V2 in the fitting section, and an approximate function V3a is calculated for the time series data V3 in the fitting section.

The time-series data group V1s shown in FIG. 4 is obtained by the repetitive ascent operation of the cutoff corresponding to the time-series data V1 shown in FIG. 3, and is only for the fitting section.
Similarly to the above, the approximate expression calculation unit 43 calculates an approximate function for each time series data in the time series data group V1s, and creates an approximate function group V1as shown in FIG.

  The time series data and the approximate function shown in FIGS. 3 and 4 are displayed on the setting / monitoring unit 9. As shown in FIG. 5, approximate functions V1b, V2b, V3b of a quadratic function and other types of functions may be applied.

  Next, the breakage breakage detecting device 2 of the present embodiment will be described along a series of flow from the initial setting to the start of use.

First, initial setting is performed when the apparatus 2 is manufactured as follows.
The setting / monitoring unit 9 is connected to the main body of the breaking breakage detecting device 2.
An approximate function group is acquired according to the above-described procedure for time-series data obtained by raising the cutoff operation a plurality of times, and a determination allowable range is set based on the acquired approximate function group. Further, the determination allowable range is similarly set for the case of the cutting with different lengths and the cutting with the breakage prevention device, and these are stored in the database unit 5 as standard determination allowable ranges.
In other words, the database unit 5 is operated when the level crossing cutting machine is lifted for each length of the cutting in an actual use state where the normal cutting without breakage and accessories such as a breakage preventer are attached. An allowable function set based on an approximate function calculated based on the motor current and an approximate function group obtained by repeating a plurality of ascending operations under the same conditions is stored.

As can be seen from the approximate functions V1a, V2a, and V3a in FIG. 3, the motor currents that raise the cutoffs of different lengths have the largest difference at the left end of the graph, and the difference decreases as it goes to the right. Therefore, the judgment reference time is brought closer to the left end of the graph , that is, the judgment allowable range value at the time when the cutoff position is almost horizontal is compared with the approximate value of the electric motor current value at the same time point. It can be seen that the determination becomes easier as the breakage determination is performed . At the time of judgment reference, it is written in the program by default. When it is possible to input later, the setting / monitor unit 9 is operated to input the determination reference time and is stored in the database unit 5.
Next, a determination allowable range is determined. The determination allowable range may be set in consideration of a certain width in consideration of the fluctuation of the cutoff due to the influence of wind and surrounding vibration in the width including the approximate function group V1as shown in FIG. . For example, as shown in FIG. 6, the determination allowable range is set by the width between the broken line VL and the broken line VH.
As a result, when the cutoff is normal, the approximate value calculated by the approximate value calculation unit 61 is included in the determination allowable range, so that it can be determined to be normal, and if broken, the cutoff is shortened, so that the approximate function group V2as is moved and determined. It can be determined as a breakage outside the allowable range.
The allowable determination range as described above is set for each cutoff length and is input to the database unit 5.

Next, a description will be given of the setting and confirmation before use of the breaking / breaking breakage detection apparatus 2 at the level crossing breaker installation site.
First, the setting / monitoring unit 9 is connected to the main body of the breaking breakage detecting device 2.
The operator operates the setting / monitor unit 9 (or the cutting length setting switch 7) to select the cutting length.
The selected cutoff time-series data group, approximate function group, and determination allowable range are displayed on the setting / monitoring unit 9.
The operator confirms the set allowable determination range, and if there is a change in the allowable determination range, the operator operates the setting / monitor unit 9 to change and input the allowable determination range, and then ends the setting.

If the determination allowable range is set, the abnormality determination unit 6 works effectively, and the use of the breakage breakage detecting device 2 is started. However, first, as a test use, the determination operation is monitored and confirmed as follows, and the determination allowable range is adjusted as necessary.
To do so, first, the setting / monitoring unit 9 is connected to the main body of the breaking / breaking detection device 2.
The operator operates the setting / monitoring unit 9 to display the selected cutoff time-series data group, the approximate function group, and the set determination allowable range on the setting / monitoring unit 9.
The time series data of the motor current value is displayed in a graph on the setting / monitoring section 9 along with the cutting operation, and the approximate function calculated after the end of one ascending operation is displayed in the graph on the setting / monitoring section 9. Then, the approximate value calculated by the approximate value calculation unit 61 is also displayed and output on the setting / monitoring unit 9, and “normal” is set if it is within the determination allowable range, and “breaking breakage” is set if it is outside the determination allowable range. Displayed and output on the monitor unit 9.
Each time there is a determination, the database unit 5 associates the determination result, the time series data at the time of the ascending operation of the cutting device and the information for determining the approximate function thereof, with the time when the cutting operation is performed. To store and store.
The operator monitors the determination operation as described above, and when the determination allowable range is to be adjusted, the operator operates the setting / monitor unit 9 to change and input the determination allowable range.
When all the confirmations and settings are completed, the setting / monitoring unit 9 is disconnected from the main body of the cutting / breaking breakage detecting device 2. As a result, the breakage breakage detecting device 2 is in a state in which the detection function can be exerted. Therefore, if the crossing breaker 1 is operated and used, the breakage breakage can be detected. Further, the data that the breaking / breaking breakage detection device 2 determines to be normal during use is collected, the result of calculating the approximate expression is stored in the database unit 5, and the setting / monitoring unit 9 is connected to restore the determination allowable range. If it is possible to refer to the additional data when setting, the determination accuracy can be improved.
When the setting / monitor unit 9 is always connected and used, a screen changeover switch for setting display and use display is provided, guidance display for adjustment operation of the allowable judgment range is displayed on the setting display screen, and judgment is performed on the use display screen. The operation and determination result may be displayed. In addition to “normal, unknown, broken” as a determination result, a partial break may be displayed.

DESCRIPTION OF SYMBOLS 1 Railroad crossing breaker 2 Breaking breakage detection apparatus 3 Data collection part 4 Approximation calculation part 5 Database part 6 Abnormality judgment part 7 Cutting length setting switch 8 Connector 9 Setting / monitor part V1, V2, V3 Time series data V1a of motor current , V2a, V3a Approximate function V1s Motor current time series data group V1as Approximate function group V1b, V2b, V3b Approximate function (secondary function)

Claims (8)

A breakage breakage detection device for a level crossing cutting machine that cuts off a road intersecting with a railroad by means of a breaking operated by an electric motor in front of the level crossing,
A data collection unit that collects time-series data of the current value of the electric motor when the cutoff operation moves upward from a substantially horizontal position to a substantially vertical position;
An approximate calculation unit for calculating an approximate function of the time series data;
A database unit that stores the approximate function calculated by the approximate calculation unit in association with individual identification information for cutting, and
Whether or not the value of the approximate function calculated each time the cutoff can be lifted deviates from the judgment allowable range at the time of a predetermined judgment reference belonging to the section in which the cutoff lift moves from the substantially horizontal position to the substantially vertical position A breakage breakage detecting device for a railroad crossing breaker, comprising: an abnormality determination unit that determines breakage of the breakage breaker. The approximate calculation unit includes:
Upon receiving the input of the time series data, a maximum value detection unit that detects a maximum value from the electric motor current excluding the starting current of the electric motor in the time series data;
A fitting section setting unit that sets a time that is a predetermined current value from the time-series data in a range before or after the time when the maximum value detected by the maximum value detecting unit is set as a fitting section start point;
The breakage breakage detection apparatus for a level crossing breaker according to claim 1, wherein the approximate function is calculated for the time series data in a range from the fitting section start point to the point at which collection is stopped.   The database unit includes a determination result for each determination made by the abnormality determination unit, the time-series data at the time of the lifting operation of the cutoff target, and information for determining the approximation function. The breakage breakage detecting device for a level crossing breaker according to claim 1 or 2, wherein the breakage breakage detecting device accumulates in association with a time when the breaker lifts. Display means for displaying the approximate function read from the database unit;
The breakage breakage detecting device for a level crossing breaker according to any one of claims 1 to 3, further comprising setting means for allowing an operator to set the allowable determination range.   The database unit is configured to operate the electric motor when the railroad crossing breaker is lifted for each length of the breaker in an actual use state in which accessories such as a normal breaker and a breakage preventer that are not broken are attached. 5. An allowable range set based on an approximate function calculated based on a current and an approximate function group obtained by repeating a plurality of ascending operations under the same conditions is stored. A breakage breakage detecting device for a railroad crossing breaker according to any one of the above. The abnormality determination unit compares the value of the determination allowable range at the same time point with the approximate value of the electric current value of the electric motor at a predetermined position at the time when the cutoff rises, and detects that the deviation from the determination allowable range value is detected. The breakage breakage detecting device for a level crossing breaker according to any one of claims 1 to 5, wherein: The abnormality determination unit performs breakage determination by comparing a value of a determination allowable range at a time when the cutoff position is substantially horizontal and an approximate value of an electric current value of the electric motor at the same time. The breakage breakage detecting device for a level crossing breaker according to any one of claims 1 to 6.   8. The breakage breakage detection device for a level crossing breaker according to claim 1, wherein the level crossing breaker is a level crossing breaker not having a balance weight and a balance assisting mechanism. 9. .

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