JP2013159253A - Gate bar breakage detection device of crossing gate and crossing gate that provided with the same - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain a gate bar breakage detection device of a crossing gate, capable of detecting breakage of a gate bar in a simple configuration.SOLUTION: A gate bar breakage detection device of a crossing gate includes: a data collection section 3 for collecting time-series data of motor current flowing through a motor M when a gate bar 11 moves up from a substantially horizontal position to a substantially vertical position; a cycle calculation section 4 for calculating a variation cycle of the motor current from the time-series data; a failure determination section 6 for determining breakage of the gate bar 11 when the variation cycle of the motor current is not within the determination allowance range set according to the length of the gate bar 11.

Description

  The present invention relates to a breakage breakage detecting device for a level crossing machine and a level crossing machine provided with the same.

  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 this breakage of the breaker, there is a technique that uses current data of an electric motor that moves the breaker up and down. For example, in the apparatus described in Patent Document 1, the linear statistic of the time series data of the motor current is calculated, the total value of the linear statistic is obtained, and the trajectory parallel measure is calculated based on the time series data. Calculate the non-linear statistic by calculation, obtain the average value of the non-linear statistic, plot the total value of the linear statistic and the average value of the non-linear statistic as an evaluation function, respectively, in a two-dimensional space, A region formed by each point 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.

  Moreover, in the conventional level crossing cutoff machine, as described in Patent Document 2, the speed of the servo motor is controlled by the control unit (servo driver) using the motor current and rotation angle information of the servo motor that drives the cutoff machine. What to do is proposed.

JP 2008-290549 A JP 2010-228580 A

However, in the technique of Patent Document 1, it is necessary to accumulate a large amount of time-series data of motor current, and the processing load required for arithmetic processing such as linear statistics and nonlinear statistics of time-series data increases. For this reason, there is a problem that the memory capacity and the program capacity related to the detection of breakage of the cutoff increase.
In particular, when adding a breakage detection function to the existing breaker, there may be no sensor to detect the motor current, or the memory capacity or program capacity of the existing control unit may not be sufficient. This necessitates the addition of new separate parts. However, it is difficult to add a built-in component when there is not enough room to add a new component inside the railroad crossing breaker, and there is a problem that adding a built-in component increases cost. .
For example, as in the technique of Patent Document 2, in a railroad crossing breaker that detects the current value of a servo motor and controls the motor speed, a sensor for detecting the motor current is provided. It is not necessary to add an additional sensor. However, the controller (servo driver) that controls the speed of the servo motor has a small memory capacity and program capacity, and it is difficult to add the breakage detection function for the breaker as described above.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-described problems, and includes a crossing breaker detecting device for a crossing breaker capable of detecting breakage of a breaker with a simple configuration, and a crossing breaker having the same. You will get a chance.
In addition, a breakage breakage detection device for a crossing breaker that can add a breakage detection function for a breaker without adding new parts to an existing breaker, and a crossing breaker equipped with the breakage breaker It is.

  A breakage breakage detection device for a level crossing machine according to the present invention is a breakage breakage detection device for a level crossing machine that detects breakage of the breakage of a level crossing machine driven by a motor. A data collection unit that collects time-series data of a motor current flowing through the motor when moving upward from a horizontal position to a substantially vertical position; a cycle calculation unit that obtains a fluctuation cycle of the motor current from the time-series data; and the motor And an abnormality determination unit that determines breakage of the cutoff when the current fluctuation period is not within the allowable determination range set according to the length of the cutoff.

  The cycle calculating unit obtains a fluctuation period of the motor current from the time series data when the breaking operation is stopped, and the abnormality determination unit stops the lifting operation. In doing so, the breakage of the shield is determined.

  Further, the period calculation unit obtains, as the fluctuation period, a time interval at a time when the motor current has changed from an increase to a decrease or a time interval at a time at which the motor current has changed from a decrease to an increase.

  In addition, the period calculation unit may calculate a time interval at a time when the motor current has changed from an increase to a decrease, or a time interval at a time at which the motor current has changed from a decrease to an increase. Each is detected from data, and an average value of the plurality of time intervals is obtained as the fluctuation period.

  In addition, the period calculation unit may calculate a time interval at a time when the motor current has changed from an increase to a decrease or a time interval at a time when the motor current has changed from a decrease to an increase. A plurality of data are detected from the data, and the minimum value of the plurality of time intervals is obtained as the fluctuation period.

  In addition, the period calculation unit obtains a fluctuation period of the motor current from the time-series data belonging to a predetermined time period among the time until the cutoff operation moves up from a substantially horizontal position to a substantially vertical position. is there.

  The abnormality determining unit stores in advance the determination allowable range set based on the motor current when the uncut breaker is lifted.

  Further, the data collection unit, the period calculation unit, and the abnormality determination unit are incorporated in a motor controller that controls a motor current flowing in the motor so that an increase rate of the cutoff is constant. .

  Further, a railroad crossing breaker according to the present invention is provided with the above-described breakage breakage detecting device for the railroad crossing breaker.

According to the present invention, the fluctuation period of the motor current is obtained from the time series data of the motor current when the breaking machine moves up, and the breaking of the breaking machine is determined using this fluctuation period. Can be detected.
In addition, a breakage detection function for a breaker can be added to a railroad crossing machine that controls the speed of the motor so that the ascending speed of the breaker driven by the motor is constant, without adding new parts.

It is a side view which shows the level crossing cutting machine which concerns on Embodiment 1 of this invention. It is a front view which shows the level crossing cutting machine which concerns on Embodiment 1 of this invention. It is a block block diagram which shows the servo driver which concerns on Embodiment 1 of this invention. It is a block block diagram which shows the breaking breakage detection apparatus which concerns on Embodiment 1 of this 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 the three cutoffs from which length differs from a horizontal position to a vertical position, respectively. It is a figure which shows an example of the peak time and peak interval of each time series data shown in FIG. It is a graph which shows an example which repeated the raising operation | movement of three cutoffs from which length differs, respectively, and averaged the time series data of those motor currents. It is a figure which shows an example of the peak time and peak interval of each time series data shown in FIG.

Embodiment 1 FIG.
Hereinafter, the case where the breakage breakage detecting device for a level crossing breaker according to the present invention is applied to a level crossing breaker having no balance weight and balance assist mechanism will be described as an example.
Railroad crossing machines without balance weights and auxiliary mechanisms tend to increase the amount of motor current fluctuation when the load on the motor is higher than the level crossing machine with balance weights and auxiliary mechanisms. Therefore, the breakage breakage detecting device of the present invention can be particularly preferably applied. In addition, this invention is not limited to this, It is also possible to apply to a level crossing cutting machine which has a balance weight and an auxiliary mechanism.

(Railroad crossing breaker)
FIG. 1 is a side view showing a railroad crossing breaker according to Embodiment 1 of the present invention.
FIG. 2 is a front view showing the railroad crossing breaker according to Embodiment 1 of the present invention.
The railroad crossing breaker 1 is installed at a railroad railroad crossing, and the barrier 11 supported by the housing body 10 so as to be able to be tilted up and down is moved up and down by the rotation of the motor M so that the railroad crossing is impossible. Or open to pass.

  On the housing body 10, a shielding support shaft 12 for mounting the shielding can 11 is rotatably supported. A shield holder H for holding the shield 11 is fixed to the shield support shaft 12. The rear end of the shield 11 is inserted into the shield holder H, and the rear end is fixed to the shield holder H.

  Inside the housing body 10, a motor M and a speed reduction unit 20 that decelerates the rotation of the motor M and transmits it to the cutoff support shaft 12 side are arranged.

  The motor M is a small servo motor. The output shaft of the motor M is supported inside the deceleration unit 20.

  The speed reduction unit 20 includes a gear shaft to which a plurality of small gears are attached, a bearing that supports the gear shaft, a motor output shaft bearing that supports the output shaft of the motor M, and the like. The motor M and the speed reduction unit 20 are integrally connected.

  An output end gear 29 is attached to the output end of the speed reduction rotation output shaft 24 of the speed reduction unit 20 that is outside the housing body 10. The output end gear 29 meshes with a cutoff support shaft side gear 13 attached to the cutoff support shaft 12.

  The cutoff support shaft side gear 13 is a fan-shaped spur gear, and teeth are formed on the arcuate portion 14. Stoppers S for restricting the rotation range of the cutoff support shaft side gear 13 are disposed at two locations above the cutoff support shaft 12. A buffer member 16 is attached to the side surface portions 15 on both sides of the arcuate portion 14 of the cutoff support shaft side gear 13 to reduce the impact when the cutoff support shaft side gear 13 side hits the stopper S.

  When the rotation of the motor M is transmitted from the output end gear 29 to the cut-off support shaft side gear 13, the cut-off support shaft 12 rotates within the rotation range restricted by the stopper S, and the cut-off can 11 is raised or lowered. Move down.

  The reduction unit 20 obtains a large reduction ratio by the plurality of gears and the output end gear 29. Since the railroad crossing breaker 1 according to the present embodiment does not have a balance weight and an auxiliary mechanism, the load on the motor M is larger than that of a railroad crossing barrier having a balance weight and an auxiliary mechanism. For this reason, the reduction ratio is set to be large. For example, the railroad crossing barrier 1 according to the embodiment of the present invention has a reduction ratio of about 500 to about 600, which is about 2 to 3 times larger than the conventional one.

(Servo driver)
Next, a servo driver that controls the speed of the motor M so that the ascending / descending speed of the cutting can 11 is constant will be described.
FIG. 3 is a block configuration diagram showing the servo driver according to the first embodiment of the present invention.
As shown in FIG. 3, the basic configuration for performing speed control includes an angle sensor 101 built in or attached to the motor M and a servo driver 100 that receives a signal from the sensor and processes it. The

  The servo driver 100 has a function of acquiring the motor current flowing through the motor M and a function of adjusting the motor current flowing through the motor M. The servo driver 100 calculates the rotational speed of the motor M based on the signal received from the angle sensor 101, compares the calculated speed with the set speed, and adjusts the motor current so that the difference becomes zero. It has a function to do. The servo driver 100 corresponds to the “motor controller” in the present invention.

  As the angle sensor 101 built in or attached to the motor M, a sensor that can directly or indirectly obtain the rotational speed of the motor M can be used as appropriate. For example, a resolver can be used favorably as the angle sensor 101.

  The servo driver 100 according to the present embodiment has a built-in breaking / breaking detection device 2 that detects breaking of the breaking can 11. In addition, the detection of breakage includes not only the complete breakage of the breaker but also the state such as the hanging breakage that hangs in a state where the tip is connected from the broken part in addition to the partial breakage partially taken away from any part. .

In the motor current control of the motor M by the servo driver 100, since the ascending / descending speed changes due to the swinging (vibration) of the elastic cutoff rod 11, the motor current also fluctuates accordingly. Since the swinging (vibration) of the cutoff can 11 during the lifting / lowering operation depends on the length of the cutoff can 11, the fluctuation cycle of the motor current also depends on the length of the cutoff can 11. When the breaker 11 is broken, the length of the breaker 11 changes, so that the fluctuation period of the motor current also changes before and after the breakage.
The breaker breakage detecting device 2 according to the present embodiment detects the breakage of the breaker 11 by capturing the characteristics of the fluctuation period of the motor current as described above.
Details of such a breakage breakage detecting device 2 will be described next.

(Cut-off breakage detector)
FIG. 4 is a block configuration diagram showing the breakage breakage detecting apparatus according to Embodiment 1 of the present invention.
As shown in FIG. 4, the breakage breakage detection device 2 includes a data collection unit 3, a cycle calculation unit 4, a database unit 5, and an abnormality determination unit 6. Further, a cutoff length setting switch 7 is connected to the abnormality determination unit 6, and a setting / monitoring unit 9 is detachably connected to the database unit 5 via a connector 8.

The data collection unit 3 receives the motor current, the rise start signal, and the rise stop signal from the servo driver 100.
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, thereby generating a motor current Time series data is generated and stored in the data storage unit 33.
When the data collecting unit 3 receives the rising stop signal, the data collecting unit 3 completes the time series data related to one rising operation signal, and outputs the time series data to the period calculation unit 4.

The period calculation unit 4 receives the time-series data input from the data collection unit 3.
The period calculation unit 4 includes a detection section determination unit 41, a peak detection unit 42, and a peak interval calculation unit 43.
When the period calculation unit 4 receives input of time-series data, first, the detection interval determination unit 41 first selects a predetermined time interval from the time until the cutoff lever 11 moves upward from the substantially horizontal position to the approximately vertical position. decide. For example, an interval between 10% and 80% is determined with 0% at the start of ascent and 100% at the ascent stop.
Next, the peak detection unit 42 detects, from the time series data belonging to the determined time interval, the time when the motor current has changed from increasing to decreasing as the peak time.
The peak interval calculation unit 43 calculates a time interval between adjacent peak times as a fluctuation period of the motor current. Information on the fluctuation period is stored in the database unit 5.

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. 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. The database unit 5 outputs information on the allowable determination range to the abnormality determination unit 6.
The determination allowable range stored in the database unit 5 is obtained in advance, for example, by adding a predetermined allowable rate to the fluctuation period obtained based on the motor current when the uncut breaker 11 is lifted. Set the value. In addition, a plurality of determination allowable ranges may be set for each length of the shield 11.

  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. If a plurality of determination allowable ranges to be stored in the database unit 5 are not set, the cutoff length setting switch 7 may be omitted.

The abnormality determination unit 6 includes a determination unit 61 and an allowable range storage unit 62.
The abnormality determination unit 6 specifies the length of the cutoff according to the setting input from the cutoff length setting switch 7, reads the determination allowable range according to the length from the database unit 5, and stores it in the allowable range storage unit 62. To do.
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 enabled, the determination unit 61 reads out the determination allowable range from the allowable range storage unit 62 every time the lifting operation of the cutoff is completed, and the motor current fluctuation period is within the determination allowable range. The breakage of the blockage is judged by whether or not it deviates from. That is, the determination unit 61 determines that the motor current fluctuation period is a value within the determination allowable range, and determines that the motor current fluctuation period is a value outside the determination allowable range, determines that the motor current is broken, and outputs a determination signal to the outside.

(Operation)
Next, the breaking detection operation of the breaking by the breaking / breaking detection device 2 will be described.

As described above, the breakage breakage detecting device 2 in the present embodiment is built in the servo driver 100. However, since the servo driver 100 is originally for controlling the motor M, there is no remaining power to detect the breaking breakage during the speed control of the motor M.
Therefore, during the raising control of the cutting can 11, the motor current is collected by the data collecting unit 3, and the idle time from the completion of the raising operation of the cutting can 11 to the next descent, that is, the raising / lowering operation of the cutting can 11 stops. In the meantime, the fluctuation period of the motor current is obtained by the period calculation unit 4, and the breakage of the breaker 11 is detected by the abnormality determination unit 6.
By such an operation, it is not necessary to increase the memory capacity and program capacity of the servo driver, and the calculation load during the lifting control of the cutting cutter 11 does not increase. It becomes possible to add a detection function.

FIG. 5 is a graph showing an example of time-series data of motor current when three cutoffs having different lengths are moved up from the horizontal position to the vertical position.
As shown in FIG. 5, the motor current when the cutoff mechanism is raised from the horizontal position to the vertical position shows a tendency to gradually decrease as a whole while periodically increasing and decreasing. Of the three, the time-series data I1 has the longest cutoff data 11 (length 8m), the time-series data I2 has an intermediate length (length 6m), and the time-series data I3 has the shortest data 11 4 m).
The data collection unit 3 collects time series data as shown in FIG. 5 and outputs it to the period calculation unit 4.

  The detection interval determination unit 41 of the cycle calculation unit 4 sets, for example, 0% at the start of the rise and 100% at the rise stop in the time until the cutoff 11 moves up from the substantially horizontal position to the substantially vertical position. An interval between 10% and 80% is determined. In the case of a level crossing cutting machine that shows a tendency that the motor current gradually decreases while rising from the horizontal time to the vertical time, the initial rise when the starting current of the motor M occurs and the fluctuation of the motor current By using the data excluding the end of the rise when there is less loss, it is possible to detect the breaking breakage well.

Next, the peak detection unit 42 detects, from the time series data belonging to the determined time interval, the time when the motor current has changed from increasing to decreasing as the peak time.
This peak time is detected by sequentially comparing the data converted into discrete digital values by the A / D converter 32, and when the decreasing tendency continues for a certain period, the time at the start of the reduction is used as the peak time. To detect. An example of such a detection algorithm will be described.

(1) The count value is initialized.
(2) A difference value between the current target data and the previous data is obtained.
(3) If the difference value is positive, return to (2).
(4) If the difference value is negative, the time A of the current target data is stored.
(5) If the difference value is negative three or more times continuously, the time A in (4) is detected as the peak time.
(6) If the difference value is zero, the time Zs of the current target data is stored and the process returns to (2).
(7) The above (2) to (6) are repeated, and the time Zt of the target data when the difference value changes from zero to negative is stored.
(8) After the above (7), if the difference value is negative three times or more continuously, an intermediate time between the time Zt and the time Zs is detected as a peak time.
(9) The above steps (1) to (8) are repeated until the time interval determined by the detection interval determination unit 41 ends.

FIG. 6 is a diagram showing an example of the peak time and peak interval of each time series data shown in FIG. The unit of the numerical values shown in FIG. 6 is expressed as a ratio (%) of the peak time to the rising time, with 0% at the start of rising and 100% at the rising stop.
As in the example of FIG. 6, the longer the cutoff length, the longer the peak interval, and the shorter, the shorter the interval. This shows a periodic tendency when the elastic body cutout 11 vibrates.

  The peak interval calculation unit 43 calculates a difference between adjacent peak times from the peak time detected by the peak detection unit 42, and obtains the time interval as a fluctuation period of the motor current. Information on the fluctuation period is stored in the database unit 5. In the time series data in one ascending operation, when there are three or more peak times and a plurality of time intervals are calculated, the minimum value of the time intervals may be set as the fluctuation cycle. Or it is good also considering the average value of several time intervals as a fluctuation period.

In the above description, the time at which the motor current has changed from increase to decrease is obtained as the peak time. However, the present invention is not limited to this, and the time at which the motor current has changed from decrease to increase is obtained as the peak time. This time interval may be set as the fluctuation cycle.
In the above description, the time interval between adjacent peak times is calculated. However, the present invention is not limited to this. For example, a time interval of a predetermined number of peak times is calculated such as calculating a time interval for two cycles. It is also possible to calculate and use this as the fluctuation cycle.

(effect)
As described above, in the present embodiment, the fluctuation cycle of the motor current is obtained from the time series data of the motor current when the cutoff cannula 11 moves up, and the breakage of the cutoff cannula 11 is determined using this fluctuation cycle. It is possible to detect breakage of the cutoff with a simple configuration.

Further, a breakage detection function of the cutting can 11 is added to the level crossing cutting machine 1 that controls the speed of the motor M so that the ascending speed of the cutting can 11 driven by the motor M is constant. be able to.
That is, since the servo driver 100 monitors the motor current for speed control of the motor M, a sensor and wiring for measuring the motor current are not required even when a breakage detection function is added.

  Since the servo driver 100 measures the motor current during the control of the motor M, a program for storing the memory in the servo driver 100 in the order in which the motor current is measured is added to function as the data storage unit 33. Thus, time series data of the motor current can be collected.

  When the lifting / lowering operation of the cutting cannula 11 is stopped, the cycle calculation unit 4 obtains the fluctuation period of the motor current, and the abnormality determination unit 6 detects the breakage of the cutting cannula 11, so that the servo driver 100 is cut off. Even if the function of the breakage detecting device 2 is added, the motor control by the servo driver 100 is not hindered.

  Moreover, the peak time detection by the period calculation unit 4 is obtained using simple four arithmetic operations and logical operations, and the fluctuation period can be subtracted from the peak time, so that the calculation processing load is low and the program amount (occupied program) Area) can be reduced.

Embodiment 2. FIG.
In the present embodiment, a mode will be described in which time intervals are detected from time-series data in a plurality of ascending operations, and an average value of the plurality of time intervals is obtained as a fluctuation period.
Note that the configurations of the railroad crossing breaker 1 and the breakage breakage detecting device 2 in the present embodiment are the same as those in the first embodiment, and the same parts are denoted by the same reference numerals.

When calculating the time interval of the peak time, the peak interval calculation unit 43 in the present embodiment stores the information on the time interval in the database unit 5 together with the identification information of the time series data.
Then, when the lifting operation of the cutoff plate 11 is performed a predetermined number of times set in advance, the peak interval calculation unit 43 obtains the time interval of each time stored in the database unit 5 and obtains these average values as the fluctuation cycle. . Information on the fluctuation period is stored in the database unit 5.
When the peak interval calculation unit 43 obtains the average value of the time intervals as the variation period, the abnormality determination unit 6 determines the breakage of the cutoff depending on whether the variation period deviates from the allowable determination range.

FIG. 7 is a graph showing an example in which three blockers having different lengths are respectively replaced and the ascending operation is repeated a plurality of times, and the time series data of those motor currents are averaged.
FIG. 7 shows a case where the ascending operation is repeated five times under the same condition as that of the cutoff can 11 shown in the first embodiment (FIG. 5) and the motor current values are averaged. In the example shown in FIG. 7, since the vibration period is stable, there is no significant difference from the example of the first embodiment (FIG. 5).

FIG. 8 is a diagram showing an example of the peak time and peak interval of each time series data shown in FIG. The unit of the numerical value shown in FIG. 8 is expressed as a ratio (%) of the peak time to the rising time, where 0% is the start time of rising and 100% is the stopping time.
As in the example of FIG. 8, the longer the cutoff length, the longer the peak interval, and the shorter, the shorter the interval. This shows a periodic tendency when the elastic body cutout 11 vibrates. The range of the peak interval is substantially the same as that in FIG. This indicates that the fluctuation range is relatively small, and the motor current repeatedly increases and decreases in substantially the same cycle.

(effect)
As described above, also in the present embodiment, the same effect as in the first embodiment can be obtained.
In the present embodiment, the time intervals are detected from the time series data in a plurality of ascending operations, and the average value of the plurality of time intervals is obtained as the fluctuation period. Even when the increase / decrease period of the motor current temporarily changes due to a temporary external load or the like, false detection of breakage can be reduced.

Embodiment 3 FIG.
In the present embodiment, a setting operation at the time of operation of the breaking breakage detecting device 2 will be described.
Note that the configurations of the railroad crossing breaker 1 and the breakage breakage detecting device 2 in the present embodiment are the same as those in the first embodiment, and the same parts are denoted by the same reference numerals.

  First, a description will be given along a series of flow from the initial setting to the start of use of the breaking breakage detection device 2.

Initial setting is performed at the time of manufacturing the breakage breakage detecting device 2.
First, the setting / monitoring unit 9 is connected to the main body of the breaking breakage detecting device 2.
Next, the fluctuation period of the motor current is obtained from the time-series data obtained by moving the shut-off can 11 a plurality of times according to the above-described procedure, and the determination allowable range is set based on the obtained fluctuation period. Further, for the case of the shield 11 having a different length, a determination allowable range is similarly set, and these are stored in the database unit 5 as a standard determination allowable range.
That is, the database unit 5 sets the determination allowable range set based on the motor current when the level crossing cutting machine 1 is lifted for each length of the cutting bar 11 in the normal usage state without breaking. Remember.

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 set monitor 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 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.
At this time, the time-series data of the selected shield 11 may be displayed in a graph on the monitor unit 9.

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 may be monitored and confirmed as follows, and the determination allowable range may be 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 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 unit 9 in accordance with the operation of the cutoff device 11. Then, “normal” is displayed on the setting / monitoring unit 9 if the fluctuation period of the motor current is within the determination allowable range, and “breaking breakage” is displayed on the setting / monitoring unit 9 if it is outside the determination allowable range.
Each time the determination is made, the database unit 5 stores and accumulates the determination result and time-series data at the time of the ascending operation of the cutting device as a determination target, in association with the time when the cutting operation is performed.

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.
Furthermore, the data that the breakage breakage detecting device 2 determines to be normal during use is collected, the result of calculating the fluctuation period of the motor current is stored in the database unit 5, and the setting / monitor unit 9 is connected to allow determination. If it is possible to refer to the additional data when the range is reset, 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. Further, as a determination result, in addition to normal, unknown, and broken, a partial break may be displayed.

  DESCRIPTION OF SYMBOLS 1 Railroad crossing breaker, 2 Breaking breakage detection device, 3 Data collection part, 4 Period calculation part, 5 Database part, 6 Abnormality judgment part, 7 Cutting length setting switch, 8 Connector, 9 Setting / monitor part, 10 Housing body , 11 Cutting shaft, 12 Support shaft, 13 Support shaft side gear, 14 Arc-shaped portion, 15 Side surface portion, 16 Buffer member, 20 Reduction unit, 24 Reduction rotation output shaft, 29 Output end gear, 31 Current sensor, 32 A / D converter, 33 data storage unit, 34 clock, 41 detection interval determination unit, 42 peak detection unit, 43 peak interval calculation unit, 61 determination unit, 62 tolerance storage unit, 100 servo driver, 101 angle sensor, H holder , M motor, S stopper.

Claims (9)

A breakage breakage detection device for a level crossing machine that detects breakage of a level crossing machine driven by a motor,
A data collecting unit that collects time-series data of a motor current flowing through the motor when the cutoff lift moves from a substantially horizontal position to a substantially vertical position;
A period calculation unit for obtaining a fluctuation period of the motor current from the time series data;
When the fluctuation period of the motor current is not within the determination allowable range set according to the length of the cutoff, an abnormality determination unit that determines breakage of the cutoff;
A breakage breakage detecting device for a level crossing breaker. The period calculator is
When the lifting operation of the cutoff is stopped, the fluctuation period of the motor current is obtained from the time series data,
The abnormality determination unit
The breakage breakage detection device for a level crossing breaker according to claim 1, wherein the breakage of the breakage breaker is determined when the lifting operation of the breaker is stopped. The period calculator is
The time interval of the time when the motor current has changed from increase to decrease, or the time interval of the time when the motor current has changed from increase to decrease, is obtained as the fluctuation period. A breakage detection device for a level crossing breaker. The period calculator is
Detecting the time interval at which the motor current has changed from increasing to decreasing or the time interval at which the motor current has changed from increasing to decreasing from the time-series data in a plurality of ascending operations, The breakage breakage detecting device for a level crossing breaker according to any one of claims 1 to 3, wherein an average value of the time intervals is calculated as the fluctuation period. The period calculator is
A plurality of time intervals at the time when the motor current changes from increase or decrease, or a time interval at the time when the motor current changes from decrease to increase are detected from the time-series data in one ascending operation, The breakage breakage detecting device for a level crossing breaker according to any one of claims 1 to 3, wherein a minimum value of the time interval is calculated as the fluctuation period. The period calculator is
6. The fluctuation period of the motor current is obtained from the time-series data belonging to a predetermined time section of the time required for the cutoff operation to rise from a substantially horizontal position to a substantially vertical position. A breakage breakage detecting device for a railroad crossing breaker according to any one of the above. The abnormality determination unit
7. The determination allowable range set based on the motor current when the uncut breaker is raised is stored in advance. 7. A breakage detection device for a level crossing breaker. The data collection unit, the period calculation unit, and the abnormality determination unit are:
The railroad crossing breaker according to any one of claims 1 to 7, wherein the railroad crossing breaker is incorporated in a motor controller that controls a motor current flowing in the motor so that an ascending speed of the cutting rod is constant. Cutting breakage detection device. A railroad crossing breaker comprising the breakage breakage detecting device for a railroad crossing barrier according to any one of claims 1 to 8.

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