JP5791320B2 - Electronically controlled level crossing breaker - Google Patents

Description

  The present invention relates to a railroad crossing breaker that is installed at a railroad crossing and opens and closes a railroad crossing by raising and lowering a barrier fence. The present invention relates to an electronically controlled level crossing breaker.

A railroad crossing breaker is installed at a railroad railroad crossing, is equipped with a barrier fence, and swings the barrier fence from horizontal to vertical (vertical) from vertical (vertical) to horizontal to open and close the railroad crossing. The barrier rod holding unit, the rotation transmission unit, the motor, and the control drive unit are provided.
Among them, for motors (electric motors) that are the drive source that raises and lowers the barrier, adoption of brushless motors, servo motors, etc. is increasing, and current detectors such as coils and rotation detectors such as rotary encoders are attached, In many cases, feedback control is performed based on the detection and functions are improved (for example, see Patent Documents 1 to 4).

  As an example of function improvement using the detection signal, a motor drive current during motor operation or the like is detected to perform jump control while descending or swinging control while climbing (for example, see Patent Document 1). Detecting the motor rotation position, etc., so that the descent time and rise time, the descent stop position and the rise stop position can be set from the outside (see, for example, Patent Document 2), descent at the transmission mechanism Examples include those that detect a stop position and an ascending stop position (see, for example, Patent Document 3), and those that display a detection result of a motor drive current or the like on a setting unit (for example, see Patent Document 4).

  Further, the control drive unit receives the alarm output sent from the crossing control device of another device to the crossing breaker as a control signal, and this control signal is used as a descent command signal, that is, a command signal for instructing raising / lowering of the barrier rod. Controls and drives the motor rotation in response to the lowering command signal. The control circuit that mainly performs logic operation with low power and performs up-and-down control, and the motor drive that drives the motor with higher power Although it is roughly divided into circuits, recently, an electronically controlled level crossing breaker adopting an electronic circuit such as a microprocessor (MPU) as a control circuit is increasing. And since such an electronic device itself cannot realize the fail-safe required for a railroad crossing breaker, a fail-safe computer that doubles the microprocessor and compares the outputs of both according to a certain rule is provided. In the case of mismatching, the transition to the safe side is performed. Specifically, in the case of a railroad crossing breaker, the barrier is lowered to realize the necessary fail-safe.

  However, since installing such a fail-safe computer is expensive, a general-purpose microprocessor that is a non-fail-safe computer constitutes an electronic control circuit, and in addition, a relay control circuit of another system is installed. There are also developed devices that achieve both cost reduction and fail-safety by configuring a relay control circuit with a relay circuit mainly composed of relays (relays) such as electromagnetic relays and semiconductor relays. The relay control circuit operates in response to the descent command signal completely independently of the electronic control circuit, and normal elevating control is entrusted to the electronic control circuit, and is interrupted by the rotational moment generated by the weight of the interrupting rod. It comes to be in charge of only the weight drop that falls. That is, normally, motor control is performed by the electronic control circuit in response to the descent command signal, but if the descent command signal does not reach the descent stop position within a predetermined time after instructing descent, the electronic control circuit is regarded as abnormal. Then, the weight reduction control is performed by the relay control circuit, and the operation proceeds to the safe side.

  Further, in such a relay control circuit of the electronically controlled level crossing breaker, a descent time monitoring relay with a drop time element is used for checking the elapsed time. The descent time monitoring relay itself is a relay made up of a general electromagnetic relay or semiconductor relay, but the timing of transition from the operating (excited) state to the restored (non-excited) state is a predetermined drop time (delay time, predetermined time) ) For example, a delay circuit for delaying by about 10 seconds is added. As a typical example, a slow release relay is used as the descent time monitoring relay. Generally, a slow release relay has a charge / discharge circuit connected in parallel to the relay, and the slow release time (delay time, predetermined time) is determined based on the discharge characteristics from the capacitor. When a DC voltage is applied, When the relay is operated and the application of the DC voltage is cut off, the relay is restored after a lapse of time (delay time, predetermined time) (see, for example, Non-Patent Document 1 and Patent Document 5).

In addition, as another circuit example of the descent time monitoring relay, an electronic circuit including a counter or the like different from the electronic control circuit responsible for the raising / lowering control is added to the descent time monitoring relay, and the internal circuit of the relay control circuit is provided by this additional circuit. Counts the pulses of a certain period generated in the above, and when the count value of this pulse reaches a specified value corresponding to the falling element, that is, when the predetermined delay time (predetermined time) has elapsed, the descent time monitoring relay is restored, The thing is mentioned.
In the present specification, when a configuration example and an operation example of the relay control circuit are described in detail, an example in which a slow release relay having a simple circuit configuration is adopted as the descent time monitoring relay will be described.

Furthermore, in servo motors and inverter motors, regenerative resistors are often used to dissipate excess electromotive force when descending at an appropriate speed while braking the weight drop of the breaking rod, but regenerative resistors are used in the motor drive circuit. Some are built-in and others are external.
In this electronically controlled railroad crossing breaker, relay contacts that interrupt the connection to the regenerative resistor are connected in series. An example will be described.

  With respect to such an electronically controlled railroad crossing breaker, the components that are the premise of the present invention will be described with reference to the drawings. FIG. 5A is an overall block diagram of a conventional electronically controlled railroad crossing breaker 10, and FIG. 5B is a block diagram of a motor drive circuit 22 among them.

  This electronically controlled railroad crossing breaker 10 includes a housing (not shown), a blocking rod holding portion 12 that penetrates the casing inside and outside and holds the swinging base end portion of the blocking rod 11 outside the housing, and a built-in housing. The rotation transmission unit 13, the motor 14, and the control drive unit 21 are provided. Among them, for example, a three-phase motor 14 (electric motor), which is a drive source for raising and lowering the shut-off rod 11, is provided with a current detector 24 such as a coil and a rotation detector 15 such as a rotary encoder. A servo motor that is feedback controlled. The rotation transmission unit 13 is typically a reduction gear, but may be any other mechanism as long as it can transmit the rotational movement of the output shaft of the motor 14 to the blocking bar holding unit 12 at an appropriate rotation speed. And an upper limit detector 17 are attached.

  The upper limit detector 17 rises from the horizontal position (shut-off tilt angle θ = 0 to 5 °) to the vertical position (shut-off tilt angle θ = 85 to 90 °) as the shut-off rod 11 swings, and is in the ascending stop position. Is reached, the value of the ascending stop position information Su is turned on, and the value of the ascending stop position information Su is turned off when the blocking bar 11 is separated from the ascending stop position. The lower limit detector 16 turns on the value of the descent stop position information S1 when the blocking bar 11 descends from the vertical position to the horizontal position by swinging and reaches the lowering stop position, and the blocking bar 11 moves away from the lowering stop position. The value of the descent stop position information S1 is turned off. The rotation detector 15 detects the rotation angle of the output shaft of the motor 14 and uses it as motor rotation information Pm. Since the motor rotation information Pm and the cutoff angle θ are in a one-to-one correspondence, the motor rotation information Pm is used for lifting control instead of the cutoff angle θ.

  The control drive unit 21 is composed of an electronic circuit mainly composed of a programmable microprocessor (MPU), and includes an electronic control circuit 25 that controls the lifting and lowering of the interrupting rod 11, a feedback control circuit, an output stage circuit, and a current detector 24. A relay control circuit 28 that includes a motor drive circuit 22 that drives the motor 14, a descent time monitoring relay BR that includes an electromagnetic relay or a semiconductor relay, and a self-weight drop relay DR that is responsible for the self-weight drop control of the interrupter 11. It consists of.

  The electronic control circuit 25 receives the descending command signal TER of the external level crossing control device, the descending stop position information S1 and the ascending stop position information Su of the upper and lower limit detectors 16 and 17, and the motor rotation information Pm of the rotation detector 15. As a result of detecting the software runaway and other abnormalities in the electronic control circuit 25 by using, for example, a watchdog timer or the like, the elevation control program 26 for generating the motor rotation command Sm, and detecting an excessive current of the motor drive current in the current detector 24 A fault diagnosis program 27 is installed which takes in a signal and an overheat detection signal from a thermometer (not shown), detects an abnormality in the motor drive circuit 22 and generates a fault presence / absence notification signal Sd.

  When the descent command signal TER turns from on to off and a descent is instructed, the elevating / lowering control program 26 generates a motor rotation command Sm that rotates the motor 14 in the direction in which the shut-off rod 11 is lowered. The rotation command Sm is sent to the motor drive circuit 22. At this time, the motor rotation information Pm and the descent stop position information S1 are monitored, and the motor 14 rotates and extends at a predetermined constant speed. The value of the motor rotation command Sm is adjusted as needed so as to swing at a constant speed, and when the descent stop position information Sl is turned on, the rotation of the motor 14 and the swing of the shut-off rod 11 are stopped.

  In addition, when the descent command signal TER is turned on from off and is instructed to rise, the elevation control program 26 generates a motor rotation command Sm that rotates the motor 14 in the direction in which the blocking bar 11 is raised, The motor rotation command Sm is sent to the motor drive circuit 22. At this time, the motor rotation information Pm and the rising stop position information Su are monitored, and the motor 14 is rotated and stopped at a predetermined constant speed. The value of the motor rotation command Sm is adjusted as needed so that the rod 11 swings at a constant speed, and the rotation of the motor 14 and the swinging of the shut-off rod 11 are stopped when the ascending stop position information Su is turned on. . Further, in order to rotate the motor 14 at a constant speed during such up-and-down control, when the motor rotation command Sm indicates the speed, the command value is made constant and the position such as the rotation phase angle corresponding to the cutoff angle θ is set to the motor. When the rotation command Sm indicates, the increase / decrease variable of the command value is made constant.

  The failure diagnosis program 27 turns on the value of the failure presence / absence notification signal Sd when there is no abnormality in either the electronic control circuit 25 or the motor drive circuit 22, but the electronic control circuit 25 and the motor drive circuit 22 When an abnormality occurs in any of the values, the value of the failure presence / absence notification signal Sd is turned off (failure state). This failure presence / absence notification signal Sd is transmitted to the railroad crossing control device for failure notification, and when a failure occurs in the electronic control circuit 25 or the like, the raising / lowering control of the electronic control circuit 25 is discontinued and the interruption control 11 by the relay control circuit 28 is interrupted. Is also sent to the relay control circuit 28 in order to preferentially execute the self-weight drop control.

  In the motor drive circuit 22, the relay contact of the self-weight drop relay DR is inserted and connected to a power supply line (B24-PW) that supplies the operating power. When the self-weight drop relay DR is in the operating state, the operating power is supplied. Although the motor is driven, the operating power is cut off and the motor is not driven when the self-weight drop relay DR is in the recovery state. In addition, the motor drive circuit 22 receives the motor rotation command Sm from the electronic control circuit 25, performs a feedback control operation based on the detection of the current detector 24 using the motor rotation command Sm as a control target, and is the same as the number of phases of the motor 14. A phase motor control signal is generated, the motor control signal is power amplified by an output stage circuit to obtain a motor drive current, and the motor drive current is supplied to the motor 14. Such a motor drive circuit 22 causes the motor 14 and thus the cutoff rod 11 to follow the motor rotation command Sm while the self-weight drop relay DR is operating, but when the self-weight drop relay DR is restored, the motor 14 is driven. It stops, and the blocking rod 11 is lowered by its own weight.

  Further, the motor drive circuit 22 is provided with a regenerative resistor 23. This regenerative resistor 23 is for braking the weight drop of the barrier rod 11 as described above. Although the connection is dynamically established when the barrier rod 11 is lowered by its own weight, it is kept disconnected without being connected in a normal state. Specifically, the regenerative resistor 23 is connected in series with a relay contact of a self-weight drop relay DR, and the series connection circuit is connected in parallel to a motor drive current feed line with diodes on both sides. The regenerative resistor 23 is disconnected from the motor drive current feed line by the relay contact of the self-weight drop relay DR so that the motor drive circuit 22 does not disturb the motor drive of the motor 14 while the self-weight drop relay DR is operating. However, when the self-weight drop relay DR is restored, it is connected to the motor drive current power supply line by the relay contact and dissipates excess electromotive force when it is lowered at an appropriate speed while braking the self-weight drop of the breaking rod 11 It is supposed to be.

  As described above, the relay control circuit 28 includes a descent time monitoring relay circuit mainly including the descent time monitoring relay BR and a self-weight descent relay circuit mainly including the self-weight descent relay DR. Is provided with a delay circuit comprising a charge / discharge circuit in which a capacitor Ca and a resistor Ra are connected in series so that the recovery timing of the fall time monitoring relay BR is delayed by about 10 seconds of the delay time (predetermined time). It has become. Both the descent time monitoring relay BR and the self-weight drop relay DR are relays that are always operated for fail-safe.

  Specifically, the descent time monitoring relay BR has an open / close member (relay contact TER) under the control of the descent command signal TER and an open / close member (relay under the control of the descent stop position information Sl) on its drive line (B24-C24). Is connected to the contact point Sl), and even if a delay time (predetermined time) has elapsed since the descent command is issued by the railroad crossing control device and the descent command signal TER is turned off, the blocking bar 11 is still in the descent stop position. However, in the abnormal state where the descent stop position information S1 is not turned on because it is desired to reach the position, it recovers, but in a normal state other than that, it continues to operate without being recovered.

  Further, in the self-weight drop relay DR, a relay contact of the drop time monitoring relay BR and an opening / closing member under the control of the failure presence / absence notification signal Sd are inserted and connected to the drive line (B24-C24). In this case, it is detected that the electronic control circuit 25 and the motor drive circuit 22 are malfunctioning and that the breaker 11 has not fallen within the predetermined delay time by the fall time monitoring relay BR. It recovers in the event of an abnormal situation, but continues to operate without recovery in a normal state that is not.

  The use mode and operation of the electronically controlled railroad crossing breaker 10 will be described with reference to the drawings. FIG. 6 is a waveform example of a normal normal lifting signal, etc. FIG. 7 is a signal when the electronic control circuit 25 fails and the interrupting rod 11 is falling under its own weight under the control of the relay control circuit 28. It is an example waveform. Here, for simplification, it is assumed that the command value indicates the position of the motor rotation command Sm in the waveform example.

  When the electronically controlled level crossing breaker 10 is operating normally without any abnormality (see FIG. 6), and when the train does not come to the level crossing where the electronically controlled level crossing breaker 10 is installed (time t60), a descent command Since the signal TER is turned on, the motor rotation command Sm instructs the ascent of the shut-off rod 11 and the shut-off rod 11 stays at the ascending stop position, so that the shut-off tack angle θ and the motor rotation information Pm are It indicates a value corresponding to the ascending stop position, the ascending stop position information Su is on, the descending stop position information Sl is off, and the capacitor Ca is sufficiently charged. In this state, both the descent time monitoring relay BR and the self-weight descent relay DR are in an operating state.

  In this state, when the train approaches the railroad crossing and the descent command signal TER is turned off by the crossing control device (time t61), the command value of the motor rotation command Sm is lowered at a constant slope by the lift control program 26, and the motor As the motor 14 is driven by the motor drive circuit 22 that performs follow-up control with the rotation command Sm as a target, the interrupting rod 11 begins to descend at a constant speed, so that the interrupting rod inclination θ and the motor rotation information Pm also begin to decrease at a constant slope, The upper limit detector 17 is activated and the ascending stop position information Su is turned off from on, but the lower limit detector 16 is not yet activated, so that the descending stop position information Sl remains off. Further, in the relay control circuit 28, the capacitor Ca starts to discharge through the resistor Ra in accordance with the change in the drop command signal TER, so the voltage of the capacitor Ca and thus the drive voltage of the drop time monitoring relay BR starts to drop. Nevertheless, the descent time monitoring relay BR and the self-weight descent relay DR still keep operating.

  Then, when the command value of the motor rotation command Sm is lowered to the lowering stop position, the lowering stops there (time t62). At that time, the shut-off rod 11 reaches the lowering stop position according to the motor rotation command Sm, and stops. As a result, the cutoff angle θ and the motor rotation information Pm are also kept from being lowered. When the blocking rod 11 descends to the descending stop position, the ascending stop position information Su remains off, but the descending stop position information Sl is turned on from off, so that the relay control circuit 28 stops discharging the capacitor Ca, Conversely, since the capacitor Ca is charged, the voltage of the capacitor Ca and thus the driving voltage of the fall time monitoring relay BR starts to increase. In a normal state, since the discharge time of the capacitor Ca (time t61 to time t62) is shorter than the delay time (predetermined time) of the drop time monitoring relay BR, both the drop time monitoring relay BR and the self-weight drop relay DR continue to maintain the operating state. .

  After that, when the train has passed the railroad crossing and the descent command signal TER is turned on (time t63), the command value of the motor rotation command Sm starts to rise from the descent stop position to the ascending stop position with a constant slope and follows it. Since the blocking rod 11 starts to rise at a constant speed, the blocking rod inclination θ and the motor rotation information Pm also start rising at a constant gradient, and the lower limit detector 16 operates and the descent stop position information Sl is turned from on to off. Since the upper limit detector 17 has not been operated yet, the ascending stop position information Su remains off. In the relay control circuit 28, since the charging of the capacitor Ca which has already been started is continued, the voltage and therefore the driving voltage of the drop time monitoring relay BR continue to rise, and both the drop time monitoring relay BR and the self-weight drop relay DR are operating. Continue to maintain. When the blocking bar 11 reaches the ascending stop position (time t64), it returns to the initial state (time t60).

On the other hand, when the electronic control circuit 25 fails and does not operate (see FIG. 7), if the motor rotation command Sm happens to instruct the ascent of the shut-off rod 11 and the shut-off rod 11 stops at the ascending stop position, When the train does not come to the level crossing where the electronically controlled level crossing breaker 10 is installed (time t70), the state of each part is the same as the initial state at normal time, so there is no inconvenience for the time being, and there is a failure in appearance. Looks like not.
However, even if the descent command signal TER turns from on to off due to the approach of the train (time t71), since the electronic control circuit 25 does not operate due to a failure, the motor rotation command Sm remains unchanged, and thus the barrier 11 does not drop. Stay in the ascending stop position.

  However, in the relay control circuit 28, the discharge of the capacitor Ca is started in response to the OFF transition of the drop command signal TER, so that the voltage of the capacitor Ca and thus the drive voltage of the drop time monitoring relay BR starts to drop. Then, when a time exceeding the delay time (predetermined time) of the drop time monitoring relay BR has elapsed (time t72), the drop time monitoring relay BR is restored from the operating state in accordance with the voltage drop of the capacitor Ca, and accordingly. The self-weight drop relay DR is also restored from the operating state. Then, the operating power of the motor drive circuit 22 is cut off, and the shut-off rod 11 is lowered by its own weight, and the regenerative resistor 23 is connected to the motor drive current feed line by the restoration of the self-weight drop relay DR. The intercepting slope angle θ gradually decreases, and the railroad crossing 11 is safely closed by the intercepting fence 11.

  Although the illustration of the signal waveform example is omitted, the detailed description which will be repeated is also omitted. However, even when a failure of the electronic control circuit 25 or the motor drive circuit 22 is detected by the failure diagnosis program 27, the failure diagnosis program 27 Since the self-weight drop relay DR of the relay control circuit 28 is restored by the failure presence / absence notification signal Sd issued by the motor, the operating power of the motor drive circuit 22 is cut off, the shut-off rod 11 drops by its own weight, and the regenerative resistor 23 is connected to the motor. Connected to the drive current feed line, the cutoff angle θ of the cutoff bar 11 gradually decreases, and the railroad crossing is safely closed by the cutoff bar 11.

  As described above, the control drive unit 21 controls the servo mechanism that performs feedback control, and uses the watchdog timer (WDT) function that detects the software runaway of the microprocessor (MPU) of the electronic control circuit 25 or the motor 14. Abnormalities in the electronic control circuit 25 and the motor drive circuit 22 are detected based on information obtained from the current detector 24 that detects an excessive current of the coil and information obtained from a sensor (not shown) that detects abnormal heat generation, thereby detecting a failure. The failure presence / absence notification signal Sd output from the failure diagnosis program 27 is sometimes turned on from off to restore the self-weight drop relay DR. When the self-weight drop relay DR is restored, the supply of operating power to the motor drive circuit 22 is cut off, and the self-weight drop control is performed in which the shut-off rod 11 is lowered by the rotational moment generated by the weight of the shut-off rod 11. , Move to the safe side.

Normally, the lifting / lowering control of the shutting bar 11 is performed by the motor control by the electronic control circuit 25 in accordance with the lowering command signal TER, but the lowering bar 11 is within a predetermined delay time after the lowering command signal TER instructs the lowering. In the relay control circuit 28, the descent time monitoring relay BR is restored, and then the self-weight descent relay DR is restored. Then, when the electronic control circuit 25 fails due to the lifting / lowering operation monitoring and the own weight lowering control by the relay control circuit 28, the own weight lowering control of the interrupting bar 11 is performed, and the operation proceeds to the safe side.
This state is a state in which the motor control normally performed by the electronic control circuit 25 is no longer performed in response to the lowering command signal TER. Such a state transition occurs when the electronic control circuit 25 is abnormal. It shows that the fail-safe property required of the circuit breaker is ensured by complementing the failure of the circuit 25 by the relay control circuit 28.

JP 2002-160634 A JP 2002-160635 A JP 2006-069333 A JP 2010-228580 A JP 2010-079722 A

Published by Japan Railway Electrical Engineering Association, “Detailed information on railroad crossing safety equipment”, pages 291-293, May 31, 2007

Such a conventional electronically controlled level crossing breaker is provided with a relay control circuit that complements the abnormality of the electronic control circuit in addition to the electronic control circuit in order to ensure the fail-safe property required for the breaker. The electronic control circuit has a failure diagnosis function for detecting an abnormality of its own circuit, and the relay control circuit monitors the operation state of the electronic control circuit. Then turn off the power of the motor drive circuit and lower the weight of the interrupter.
In addition, the descent time monitoring relay BR and the self-weight descent relay DR, which are the central members of the relay control circuit, are always used in an operating state to ensure fail-safety.

However, in general, for relays, the use in normal operation is more likely to cause problems such as welding of contacts than the use in normal recovery, and the failure occurrence rate is high. Therefore, both the fall time monitoring relay BR and the self-weight drop relay DR are used. However, although it is cheaper than a fail-safe computer, it uses expensive and highly reliable relays among relays, so it can improve reliability while reducing costs. It is difficult to further reduce the cost while maintaining the reliability by simply modifying the relay control circuit itself.
Therefore, it is a basic technical problem to realize a highly reliable electronically controlled level crossing breaker at low cost by cooperating the electronic control circuit and the relay control circuit in a new form.

  Also, the probability of non-recoverable failure that the descent time monitoring relay BR and the self-weight drop relay DR are not restored due to contact welding etc. is small enough to meet the required safety specifications. However, even if it is improved by the above measures, it does not become zero. Moreover, since the probability of recovery of the descent time monitoring relay BR and the self-weight descent relay DR due to a failure of the electronic control circuit is very small, these relays BR and DR are in an operating state (excited state) over a long period of time. However, the state matches the operation of the electronic control circuit when it is normal. In addition, conventionally, the electronic control circuit is monitored by the relay control circuit, but conversely, the relay control circuit is not monitored by the electronic control circuit. For this reason, the abnormality that the relays BR and DR that cannot be recovered while the electronic control circuit is normal remains latent until the electronic control circuit fails. Similarly, the occurrence of a disconnection failure of the regenerative resistor 23, that is, an abnormal situation such as a poor connection of the regenerative resistor 23 to the power supply line of the motor drive current also becomes latent until the electronic control circuit fails.

However, if the electronic control circuit breaks down with such an abnormal situation latent, the function of the safety mechanism that plays a part in the fail-safe of the railroad crossing breaker is impaired, so the potential of the abnormal situation is avoided as much as possible. It is desirable to be able to do it.
Therefore, an electronically controlled level crossing breaker that can manifest the inability to recover the relay and disconnection of the regenerative resistor before the failure of the electronic control circuit is realized by cooperating the electronic control circuit and the relay control circuit in a new form. This is a further technical issue.

  The electronically controlled railroad crossing breaker of the present invention (Solution 1) was devised to solve such a problem, and includes a motor for raising and lowering the barrier rod and a motor drive circuit for driving the motor to rotate. And an electronic control circuit that controls the raising / lowering of the shut-off rod and generates a fault diagnosis of its own circuit by generating a motor rotation command to the motor drive circuit in response to a lowering command signal received from outside, A descent time monitoring relay that is maintained when the blocking rod reaches the descent stop position within a predetermined time after the descent command signal instructs descent, and a normal operation relay that recovers when it does not reach In addition to when the descent time monitoring relay is restored, it is also restored when the electronic control circuit gives a fault diagnosis result, and the motor drive circuit is stopped by the motor drive circuit. In the electronically controlled level crossing circuit breaker equipped with a self-weight drop relay that lowers the breaking bar by its own weight, relay monitoring means for intermittently trying to restore the descent time monitoring relay is provided as the electronic control circuit. It is characterized by being provided in.

  Further, the electronically controlled level crossing breaker of the present invention is (solution 2), the electronically controlled level crossing breaker of the above solution 1, wherein the relay monitoring means indicates the operating state of the self-weight drop relay during the trial. When the self-weight drop relay recovers and the self-weight drop relay and the descent time monitoring relay are determined to be normal, the relay control circuit including the self-weight drop relay fails when the self-weight drop relay does not recover. Or when the operation of the self-weight drop relay and the descent time monitoring relay is checked during the trial and both the self-weight drop relay and the descent time monitoring relay are restored, the self-weight drop relay is also lowered. Although it is determined that the time monitoring relay is also normal, either or both of the own weight drop relay and the drop time monitoring relay Characterized in that when not recovery is to determine a relay control circuit including the self-weight drop relay and the fall time monitoring relay has failed.

  Further, the electronically controlled level crossing breaker of the present invention is (Solution means 3), the electronically controlled level crossing breaker of the above solution means 2, wherein the relay monitor means that the relay control circuit has failed during the trial. When the determination is made, a failure notification or alarm is issued to the outside.

  The electronically controlled level crossing breaker according to the present invention is (solution 4), the electronically controlled level crossing breaker of the above solutions 2 and 3, wherein the relay monitoring circuit breaks down the relay control circuit during the trial. When it is determined that it has been performed, forcible lowering control is performed for lowering the blocking bar regardless of the instruction of the lowering command signal.

  Further, the electronically controlled railroad crossing breaker of the present invention is (solution means 5), the electronically controlled railroad crossing breaker of the above solution means 1 to 4, wherein the relay monitoring means stops the trial when the interrupting bar is raised. It is performed when it comes to the position.

  The electronically controlled level crossing breaker according to the present invention is (solving means 6), which is the electronically controlled level crossing breaking machine of the above solving means 1 to 4, and dissipates the electromotive force of the motor when the weight of the breaking bar is lowered. The motor driving circuit is provided with a regenerative resistor that brakes the weight drop of the barrier rod, and the relay monitoring means performs the trial while the barrier rod is descending, and the interrupter at that time The lowering state of the bag is checked, and the lowering state is compared with the normal lowering state stored in advance. When the difference between the two states is within the allowable range, it is determined that the regenerative resistor is not disconnected. However, if not, it is determined that the regenerative resistor is disconnected.

  The electronically controlled level crossing breaker according to the present invention is (solving means 7), the electronically controlled level crossing breaker of the above solving means 6, wherein the regenerative resistor is disconnected during the trial. When it is determined, a disconnection notification or a warning is issued to the outside.

  In such an electronically controlled level crossing circuit breaker of the present invention (Solution 1), the electronic control circuit responsible for the lifting control of the barrier rod is monitored by the descent time monitoring relay, and the monitoring result of the descent time monitoring relay In addition, following the conventional technology of securing the necessary fail-safety by stopping the motor drive circuit and dropping the shut-off rod by its own weight at the time of failure with the descent time monitoring relay reflecting the self-diagnosis result of the electronic control circuit By providing relay monitoring means in the electronic control circuit so that temporary recovery of the descent time monitoring relay is attempted intermittently, in addition to the descent time monitoring relay, the self-weight descent relay is also temporarily recovered from time to time. try to. For fail-safe operation, both the descent time monitoring relay and the self-weight descent relay are always used for normal operation as usual.

The trial time for relay recovery is temporary and longer than the response time of the relay, but it is a short time that does not disturb the posture of the breaking rod so that the change in the posture of the breaking rod can be visually recognized. It is limited to a short time that does not disturb the control so that the control is supported. In addition, the relay recovery attempt is intermittent, and relay recovery is tried at regular or irregular timings as appropriate. In this way, always-on relays are temporarily recovered from time to time. Since a relay failure is less likely to occur, the reliability is improved if the relay is the same as the conventional one, and an inexpensive relay is in time if the same reliability as the conventional one is sufficient. Moreover, such a recovery trial can be easily realized by adding an opening / closing member or modifying the program of the electronic control circuit.
Therefore, according to the present invention, since the electronic control circuit tries to temporarily restore the normally operating relay, a highly reliable electronically controlled level crossing circuit breaker can be realized at a low cost. The basic technical issues are solved.

In the electronically controlled level crossing breaker of the present invention (solution 2), a signal related to the relay contact is input to the electronic control circuit, and based on the signal, the operation state of the relay is examined by the relay monitoring means. Whether the relay control circuit is normal or faulty is determined according to the presence or absence of relay recovery at the time of relay recovery trial.
Therefore, according to the present invention, not only the relay control circuit monitors the electronic control circuit, but also the electronic control circuit determines whether the relay control circuit is normal or faulty by checking whether or not the relay control circuit is restored at the time of relay recovery attempt. By using the reverse monitoring, the electronically controlled level crossing breaker that can manifest the inability to recover the relay before the failure of the electronic control circuit can be realized. In addition to the problems, further technical problems are solved.

Moreover, in the electronically controlled level crossing breaker of the present invention (solution 3), when a failure of the relay control circuit is detected by the electronic control circuit, this is notified to the outside by the electronic control circuit. Repair or the like is urged for the relay control circuit in which the failure has become apparent.
In the electronically controlled level crossing breaker according to the present invention (solution 4), when the failure of the relay control circuit is detected by the electronic control circuit, the barrier rod is forcibly lowered by the electronic control circuit. In addition to the relay control circuit, even the electronic control circuit breaks down, so that it is possible to reliably prevent the occurrence of a problem that the barrier rod does not descend when the train approaches.

In the electronically controlled level crossing breaker of the present invention (solution 5), the relay recovery is attempted when the breaking bar is at the rising stop position, but the blocking bar is at the rising stop position. When the barrier rod is lowered by its own weight, the barrier rod hardly moves immediately, so there is no inconvenience if the selection and setting of trial time and trial time are somewhat small, so it is easy to materialize the relay monitoring means It is.
Therefore, according to the present invention, a highly reliable electronically controlled level crossing breaker can be realized at low cost and easily by causing the electronic control circuit to try to temporarily restore the normally operating relay.

  In the electronically controlled level crossing circuit breaker according to the present invention (solution 6), a regenerative resistor is externally mounted or built in the motor drive circuit, and the regenerative resistor causes an extra start of the motor when the weight of the interrupting rod is lowered. When the power is dissipated, the weight drop of the breaking rod is braked and the breaking rod lowers at an appropriate speed.However, if there is a disconnection failure with respect to regenerative resistance, the lowering speed of the breaking rod is the normal lowering speed. It will be different. Such a lowering state of the barrier rod can be easily checked by inputting it to an electronic control circuit using a rotation detector or other detector attached to the motor. The difference between the normal state and the disconnection is more noticeable when the barrier rod is moving up and down than when the barrier rod is stationary. Because it is difficult, it does not give a sense of incongruity to those who are waiting for a crossing.

Therefore, the relay monitoring means that controls the raising / lowering of the breaking rod tries to temporarily recover the relay while the breaking rod is descending, and the lowered state of the breaking rod at that time is compared with the normal lowered state. When the difference between the two states is within the allowable range, it is determined that the regenerative resistor is not disconnected, but otherwise, it is determined that the regenerative resistor is disconnected. The disconnection of the regenerative resistor will be detected while it is normal.
Therefore, according to the present invention, when the electronic control circuit tries to temporarily restore the normally operating relay, the disconnection of the regenerative resistor is detected based on the lowering state of the shut-off rod, whereby the regenerative resistor is disconnected. Can be realized before the failure of the electronic control circuit, and as a result, further technical problems can be solved in addition to the basic technical problems.

  In the electronically controlled level crossing breaker of the present invention (solution 7), when the disconnection of the regenerative resistor is detected by the electronic control circuit, this is notified to the outside by the electronic control circuit. Repairs etc. are encouraged for the regenerative resistance that has become apparent.

It is a block diagram which shows the structure of the electronically controlled level crossing breaker about Example 1 of this invention. It is a flowchart which shows the content of the relay monitoring program. It is an example of waveforms, such as a signal at the time of a check during a rise stop. It is an example of waveforms, such as a signal at the time of descent check. It is a block diagram of the conventional electronically controlled level crossing breaker. It is an example of waveforms, such as a signal at the time of normal normal raising / lowering. It is an example of waveforms, such as a signal at the time of a weight drop by an electronic circuit failure.

With respect to such an electronically controlled railroad crossing breaker of the present invention, a specific mode for carrying out this will be described with reference to Example 1 below.
The embodiment 1 shown in FIGS. 1 to 4 embodies all the above-described solving means 1 to 7 (claims 1 to 7 at the beginning of the application).
In the illustration, for the sake of simplification and the like, the mechanical shape, details of the electric circuit, details of the electronic circuit, etc. are omitted, and what is necessary for explaining the invention and related ones are shown in a block diagram or waveform. Shown in the figure. In addition, since the same reference numerals are given to the same components as those in the prior art in the illustration, the repeated description will be omitted, and the following description will focus on differences from the prior art.

  A specific configuration of the electronically controlled level crossing breaker according to the first embodiment of the present invention will be described with reference to the drawings. FIG. 1 is a block diagram of an electronically controlled level crossing breaker 40, and FIG. 2 is a flowchart of a relay monitoring program 44.

  This electronically controlled railroad crossing breaker 40 is different from the above-described conventional electronically controlled railroad crossing breaker 10 (see FIG. 1) in that the control drive that only monitors the electronic control circuit 25 by the relay control circuit 28. The part 21 is a mutual monitoring type control drive part 41. In the control drive part 41, the electronic control circuit 25 is partially modified to become an electronic control circuit 42, and the relay control circuit 28 is also one. The relay control circuit 47 has been modified. The mechanical parts 12 and 13 and the motor 14 and the motor drive circuit 22 remain unchanged as described above, and the motor drive circuit 22 is provided with the regenerative resistor 23 and the like described above without change. Remains.

The modification of the relay control circuit 47 is small, and the relay control circuit 47 is different from the relay control circuit 28 in that an opening / closing member 48 is inserted into the drive line of the descent time monitoring relay BR. The insertion part of the opening / closing member 48 is closer to the drive unit (coil or coil equivalent part) of the descent time monitoring relay BR than the connection part of the delay circuit. In the case of the illustrated slow release relay, the capacitor Ca and the resistor Ra are provided. It is inside the parallel connection part of the charge / discharge circuit. The opening / closing member 48 is composed of, for example, a switch, a relay contact, or the like, and opens and closes the electric circuit using the relay verification signal Sc output from the electronic control circuit 42 as a control signal.
Therefore, the descent time monitoring relay BR functions as a slow release relay as long as the relay check signal Sc is off and the open / close member 48 is conductive, but the relay check signal Sc is turned on and the open / close member 48 is shut off. Then it will be restored immediately.

  The electronic control circuit 42 differs from the electronic control circuit 25 in that the lift control program 26 is partly modified to become the lift control program 43, the relay monitoring program 44 is additionally installed, and the descent time monitoring. The operation state of whether the operation state of the relay BR and the self-weight drop relay DR is the operation state or the recovery state is input, and the relay check signal Sc is output and sent to the opening / closing member 48. In addition, a relay failure notification Er and a regenerative resistance disconnection notification Ec are added to the failure notification transmitted to the railroad crossing control device.

  The remodeling of the lift control program 43 is small, and when the relay failure notification Er is received from the relay monitoring program 44, and the relay failure notification Er is off, the lift control of the barrier 11 is performed according to the drop command signal TER as usual. However, when the relay failure notification Er is turned on, forcibly lowering control is performed to forcibly lower the blocking rod 11 to the lowering stop position in place of the relay monitoring program 44 regardless of the instruction of the lowering command signal TER. That is.

  The relay monitoring program 44 (see FIG. 1) determines the operation state of the relay control circuit 47 based on the motor rotation command Sm, the descent stop position information Sl, the operation state of the descent time monitoring relay BR, and the operation state of the own weight descent relay DR. The relay verification signal Sc is generated for monitoring, and the relay failure notification Er and the regenerative resistance disconnection notification Ec are generated as monitoring results. In the normal state, the OFF relay verification signal Sc is turned on for a short time and the descent time The monitoring relay BR and the self-weight drop relay DR are intermittently attempted to recover.

  The processing content of the relay monitoring program 44 is to temporarily turn on the relay check signal Sc when the shut-off rod 11 is in the ascending stop position in order to check whether the normally operating relays BR and DR are correctly restored. The relay check signal Sc is temporarily turned on while the shut-off rod 11 is descending in order to check whether the regenerative resistor 23 that is not always connected is correctly connected or disconnected in order to check whether or not the regenerative resistor 23 is always disconnected. It is roughly divided into a downward check that attempts to restore the relay.

  First, the check during lift stop will be described in detail (see the left half of FIG. 2). Is the blocking rod 11 stopped at the lift stop position based on the motor rotation command Sm, the lift stop position information Sl, and the lift stop position information Su? (Step S11), if it is stopped at the ascending stop position (Yes), it is also checked whether the trial time has arrived (step S12). It is executed (steps S13 to S18), and otherwise (No), it waits for the arrival of a period during which the ascent is stopped (steps S11 to S12). The trial time is determined in advance based on the service life of the circuit breaker and the number of guaranteed operations of the relay to be used. For example, the trial time is set at a constant interval of about 30 to 60 minutes and set as data or the like. Whether or not the trial time has come is determined using, for example, a built-in timer.

  When the trial time comes and when the check during the stoppage is executed, the relay check signal Sc is turned from OFF to ON (step S13), which is longer than the response time of the descent time monitoring relay BR and the self-weight drop relay DR, but After waiting for a short period of time, for example, several tens of milliseconds, which is shorter than the response time (step S14), the operating state of the descent time monitoring relay BR and the operating state of the self-weight descent relay DR are input (step S15). Then, the relay verification signal Sc is returned from ON to OFF, and the first relay verification portion of the upward stoppage verification is terminated (step S16).

  After the relay check, it is determined whether or not the relay control circuit 47 is normal based on the operating state of the descent time monitoring relay BR and the own weight descent relay DR input at that time (step S17). Specifically, when both the descent time monitoring relay BR and the own weight descent relay DR are restored in response to the relay check, the descent time monitoring relay BR, the own weight descent relay DR, and further the relay control circuit 47 are normal. judge. On the other hand, when the descent time monitoring relay BR and the self-weight descent relay DR have been operated without being restored or when the descent time monitoring relay BR has been restored in response to the relay check, the self-weight descent relay DR has been restored. If the relay control circuit 47 including the descent time monitoring relay BR and the self-weight descent relay DR has failed, the operation is determined to have failed.

  If it is determined that the relay control circuit 47 is normal, no further action is taken and the check during rising stop is completed and the next trial time is awaited (No in step S17). When it is determined that a failure has occurred (step S17, Yes), the value of the relay failure notification Er is changed from off to on (step S18). When the relay failure notification Er is turned on, the failure of the relay control circuit 47 is notified to both the external level crossing control device and the internal lift control program 43, and the forced lift control is performed by the lift control program 43 that has received the notification. This is equivalent to the relay control circuit 47 forcibly lowering the blocking rod 11 to the lowering stop position regardless of the instruction of the lowering command signal TER.

  Next, detailed inspection during the descent will be described in detail (see the right half of FIG. 2). Is the blocking rod 11 in the middle of descent based on the motor rotation command Sm, descent stop position information Sl, and ascend stop position information Su? (Step S21), and if it is in the middle of descent (Yes), it is further checked whether or not the cutoff inclination θ is equal to the threshold Th1 (Step S22), and if the cutoff inclination θ is equal to the threshold Th1. (Yes), checking during descent is executed (steps S23 to S27), otherwise (No), and waiting for the inclination to become the threshold Th1 during descent (steps S11, S21, S22). ). The threshold value Th1 is selected from a cutoff angle θ that makes the speed and acceleration when the weight of the interrupting rod 11 descends clearly differ from the speed and acceleration under the elevation control by the elevation control program 43, for example, about 40 ° from the horizontal. A value corresponding to the cutoff inclination θ is adopted.

  When the cutoff angle θ becomes the threshold value Th1 and the trial time has arrived (step S22, Yes), the relay verification signal Sc is turned from OFF to ON in order to force the weight reduction to the cutoff rod 11 by relay verification (step S23). ), Waiting for the cutoff inclination θ to become the threshold value Th2 (step S24), returning the relay verification signal Sc from ON to OFF, and canceling the weight drop due to the relay verification, which is the first part of the upward stoppage verification (Step S25). For example, the threshold Th2 is set so that even if the blocking rod 11 is accelerated rapidly, the threshold Th2 is braked sufficiently before the descent stop position, and within a range where the speed of the blocking rod 11 cannot be visually confirmed as being due to its own weight drop. A value corresponding to the intercept angle θ of about 30 ° from the horizontal is adopted.

  In addition, an elapsed time Δt spent for changing the cutoff inclination θ from the threshold value Th1 to the threshold value Th2 is obtained by a timer measurement or the like at the time of trial for dropping the dead weight, and the elapsed time Δt and the threshold value Th3 are compared after releasing the dead weight drop. (Step S26). If the elapsed time Δt is smaller than the threshold Th3, it is determined that the regenerative resistor 23 is disconnected (Yes). Otherwise, it is determined that the regenerative resistor 23 is not disconnected (No). The threshold value Th3 is a data value obtained by calculation from a design value or measurement with an actual machine and stored in advance in a memory or the like, and is obtained by adding an allowable range to a normal descent state. On the other hand, the elapsed time Δt is a data value obtained by examining the descending state of the blocking rod 11 at that time as described above. Therefore, the determination here is that the regenerative resistor 23 is determined not to be disconnected when the difference between the descent state during the descent check and the normal descent state is within the allowable range. 23 is determined to be disconnected.

  If it is determined that the regenerative resistor 23 is not disconnected, no further action is taken and the lowering check is completed and the next trial time is awaited (No in step S26), but the regenerative resistor 23 is disconnected. When it is determined that the regenerative resistance is broken (step S26, Yes), the value of the regenerative resistance disconnection notification Ec is changed from off to on (step S27). By turning on the regenerative resistor disconnection notification Ec, it is notified to the external level crossing control device that the regenerative resistor 23 has been disconnected, and the repair of the regenerative resistor 23 is urged by the crossing control device or the host device that has received the notification. It has become.

  The use mode and operation of the electronically controlled railroad crossing breaker 40 according to the first embodiment will be described with reference to the drawings. FIG. 3 is an example of a waveform of a signal or the like at the time of a check during ascending stop, and FIG.

  The operation when the failure of the electronic control circuit 42 or the motor drive circuit 22 is detected by the failure diagnosis program 27 is the same as the conventional operation described above, and the electronic control level crossing breaker 40 has no abnormality when it is normal. The operation is the same as the above-described conventional operation except for the up-and-down-inspection check and the in-descent check added by the relay monitoring program 44. Hereinafter, the operation during the up-and-down verification by the relay monitoring program 44 and the in-descent check The operation at the time will be described.

  The check during climbing stop (see FIG. 3) is executed at a predetermined cycle when the train is away from the railroad crossing and the blocking bar 11 stays at the climbing stop position. When the blocking rod 11 remains at the ascending stop position (time t30), the lowering command signal TER is turned on, the instruction of the motor rotation command Sm is increased, and the blocking gear inclination θ and thus the motor rotation information Pm is vertical. At the position (vertical position), the descent stop position information Sl is off, the ascend stop position information Su is on, the relay verification signal Sc is off (“1”), and the descent time monitoring relay BR is in the operating state (“1”). ), The own-weight drop relay DR is also in the operating state (“1”), and the relay failure notification Er is off (“0”).

  In this state, when the relay verification trial time comes (time t31), the relay monitoring signal Sc is temporarily turned on ("0") for a short period of several tens of milliseconds by the relay monitoring program 44, and accordingly, If the relay control circuit 47 is normal only during this period, the descent time monitoring relay BR is in the recovery state (“0”), and the self-weight drop relay DR is also in the recovery state (“0”). If the descent time monitoring relay BR and the self-weight descent relay DR are restored as described above, the relay monitoring program 44 determines that the relay control circuit 47 is normal and the relay failure notification Er is off (“0”). Maintain state. In addition, since the check time during ascending stop is very short, the blocking rod 11 does not move as clearly as it can be seen during that time, so the apparent operation is the same as before, but the normally operating relays BR and DR are temporarily Not only can the load be reduced by the restoration, but it is also checked whether the relay control circuit 47 is normal or malfunctioning.

  If the relay control circuit 47 fails in such a state, for example, if the descent time monitoring relay BR becomes unrecoverable, the relay verification signal Sc is temporarily turned on at the next relay verification trial time (time t32). Even when “0”), neither the descent time monitoring relay BR nor the self-weight drop relay DR maintains the operating state (“1”) and does not return to the restoration state (“0”). Then, it is determined by the relay monitoring program 44 that the relay control circuit 47 has failed, the relay failure notification Er is turned on (“1”), which is notified to the lift control program 43 and also to the level crossing control device. Is done.

When the relay failure notification Er is turned on, the forcible descent control is performed by the elevation control program 43 that receives it. Specifically, regardless of whether the descent command signal TER is on or off, the instruction of the motor rotation command Sm is lowered at a constant inclination from the ascending stop position to the descending stop position, and accordingly the breaking rod 11 When the breaking rod inclination θ changes from the vertical position to the horizontal position at a constant speed, the blocking rod 11 descends to the lowering stop position, and the lowering stop position information Sl changes from off (“0”) to on (“1”). The lowering of the blocking rod 11 is stopped, and the blocking rod 11 is held at the lowering stop position.
Thus, in the electronically controlled level crossing breaker 40, even when the relay control circuit 47 fails, the barrier 11 is lowered and the fail-safe property is ensured. Further, repair of the relay control circuit 47 is urged by the crossing control device or the host device that has received the ON relay failure notification Er.

  The midway descent check (see FIG. 4) is performed during the descent when the train approaches the railroad crossing and the blocking bar 11 descends from the ascending stop position toward the descent stop position. When the shut-off rod 11 is in the ascending stop position, as described above, the descent command signal TER is turned on, and the instruction of the motor rotation command Sm is raised, so that the shut-off ramp angle θ and thus the motor rotation information Pm is in the vertical position ( Vertical position), the descent stop position information Sl is off, the ascend stop position information Su is on, the relay verification signal Sc is off (“1”), and the descent time monitoring relay BR is in the operating state (“1”). The self-weight drop relay DR is also in the operating state (“1”), and the regenerative resistance disconnection notification Ec is off (“0”).

  In this state, when the descent command signal TER changes from the rise instruction on (“1”) to the descent instruction off (“0”) (time t40), feedback control, which is normal elevation control of the elevation control program 43, is performed. Then, the instruction of the motor rotation command Sm is lowered at a constant inclination from the ascending stop position to the descending stop position, and accordingly, the shutting bar inclination angle θ of the blocking bar 11 changes at a constant speed from the vertical position toward the horizontal position. At the same time, the voltage of the capacitor Ca starts to drop, but here, the operation when the electronic control circuit 42 is normal is explained, so that the voltage drop of the capacitor Ca causes the fall time monitoring relay BR to recover. However, before that, the cutoff inclination θ becomes the threshold value Th1, and the trial timing of the relay check comes (time t41).

  When the relay verification trial time comes (time t41), the relay monitoring signal Sc is temporarily turned on ("0") by the relay monitoring program 44, and the relay control circuit 47 is normal only during that period. For example, the descent time monitoring relay BR is in the recovery state (“0”), and the own weight drop relay DR is also in the recovery state (“0”). It becomes a self-weight drop. When the cutoff inclination θ becomes the threshold value Th2 (time t42), the relay verification signal Sc is quickly turned off (“1”), and the descent time monitoring relay BR and the self-weight descent relay DR are in operation accordingly. In order to return to (“1”), the lowering state of the blocking rod 11 also returns to feedback control from its own weight drop.

  In this way, during the relay check period during the downward check, the lowering control of the blocking rod 11 is temporarily switched from the feedback control to the self-weight drop control, but the regenerative resistor 23 is not disconnected and the regenerative resistor 23 is braked. If it is in the state, the descending speed of the blocking rod 11 is not much different from the descending speed at the time of feedback control even if it is its own weight descending (refer to the solid line waveform in FIG. 4). This is because the threshold values Th1 and Th2 are selected in advance. On the other hand, if the regenerative resistor 23 is disconnected, the regenerative resistor 23 will not be braked, so that the lowering speed of the shut-off rod 11 at the time of falling due to its own weight is larger than the lowering speed at the time of feedback control (two points in FIG. 4). (See the dashed line waveform.) Therefore, the elapsed time Δt until the cutoff inclination θ becomes the threshold Th2 from the threshold Th1 becomes shorter when the regenerative resistor 23 is disconnected than when it is not disconnected.

  Since the intermediate value between the elapsed time Δt at the time of disconnection and the elapsed time Δt at the time of no disconnection is adopted as the threshold Th3, the elapsed time Δt becomes smaller than the threshold Th3 when the regenerative resistor 23 is disconnected. Is correctly determined by the relay monitoring program 44 that the regenerative resistor 23 is disconnected. On the other hand, when the regenerative resistor 23 is not disconnected, the elapsed time Δt becomes larger than the threshold value Th3. Therefore, the relay monitoring program 44 correctly determines that the regenerative resistor 23 is not disconnected. Thus, when there is no abnormality in the regenerative resistor 23, the lowering state of the barrier rod 11 is almost the same as the conventional one. It is done.

When the regenerative resistor 23 is disconnected and the relay monitoring program 44 determines the disconnection, the relay monitoring program 44 further turns on the regenerative resistor disconnection notification Ec ("1"). The control device is notified.
Then, the repair of the relay control circuit 47 is urged by the railroad crossing control device or the higher-level device that receives it.

[Others]
In the above embodiment, the relay restoration inability check by the relay monitoring program 44 during the up / down stop check is performed by examining the operating states of both the descent time monitoring relay BR and the self-weight descent relay DR. If 47 is normal, the self-weight drop relay DR is also temporarily recovered along with the temporary recovery of the descent time monitoring relay BR. Therefore, the failure of the relay control circuit 47 is detected only by examining the operating state of the self-weight drop relay DR. Therefore, checking the operating state of the descent time monitoring relay BR may be omitted.

  In the above-described embodiment, when the relay monitoring program 44 detects that the relay cannot be recovered by the check during the rise stop, the relay failure notification Er is sent to the level crossing control device, and when the disconnection of the regenerative resistor 23 is detected by the check during the descent. Although the regenerative resistance disconnection notification Ec is sent to the railroad crossing control device, a relay failure alarm or a regenerative resistance disconnection alarm may be issued to the outside instead of or in addition thereto. Specific examples of the alarm include an alarm sound, synthesized sound, flashing of a warning light, lighting of a red status lamp, display display, and the like.

In the above-described embodiment, the motor rotation command Sm is used to grasp the cutoff angle θ, but the motor rotation information Pm may be used instead of or in addition to the motor rotation command Sm. If there is, you may use it.
In the above embodiment, the regenerative resistor 23 is externally attached to the motor drive circuit 22. However, the regenerative resistor 23 may be built in the motor drive circuit 22.

  In the above-mentioned embodiment, the check during the rise stop by the relay monitoring program 44 is relatively short so that the check during the rise stop is executed without interruption after the start. When the instruction of the lowering command signal TER is lowered during the execution of the control, the check during lifting stop by the relay monitoring program 44 is terminated, and the lifting control of the shutting bar 11 by the lifting control program 43 is preferentially executed. Anyway. Furthermore, in such a case, after stopping the ascending stop check and performing the lifting and lowering of the culvert, the check during the ascending stop stop is retried without waiting for the arrival of the next trial time in a certain period. Is preferred.

  In the above-described embodiment, the disconnection inspection of the regenerative resistor 23 by the lowering check of the relay monitoring program 44 is performed based on the magnitude of the predetermined slope descent time Δt of the interrupting rod 11. You may make it carry out based on the magnitude of descent | fall amount ((DELTA) (theta) and (DELTA) Pm). For example, in the above embodiment, the period during which the cutoff inclination θ changes from the threshold value Th1 to the threshold value Th2 is a period during which the weight drop is forced during the downward check (steps S22 to S25 in FIG. 2). The period for forcing the self-weight drop may be a fixed time of about several seconds, for example, about 2-3 seconds.

The electronically controlled railroad crossing breaker of the present invention can be applied to any one having a balancer or not having a balancer.
Also, not only those that swing the barrier rod as described above, but an electronically controlled level crossing blocker that can switch between the lifting control and the self-weight drop control, the elevator rod can be lifted and lowered while maintaining a horizontal posture. It can also be applied to.

10 ... Electronically controlled level crossing breaker,
11 ... blocking rod, 12 ... blocking rod holding portion, 13 ... rotation transmission portion,
14 ... motor (electric motor), 15 ... rotation detector, 16 ... lower limit detector,
17 ... Upper limit detector, 21 ... Control drive unit, 22 ... Motor drive circuit,
23 ... Regenerative resistor, 24 ... Current detector, 25 ... Electronic control circuit (MPU),
26 ... Lift control program, 27 ... Fault diagnosis program, 28 ... Relay control circuit,
40 ... Electronically controlled level crossing,
41 ... control drive unit, 42 ... electronic control circuit (MPU),
43 ... Lift control program, 44 ... Relay monitoring program,
47 ... Relay control circuit, 48 ... Opening / closing member (switch, relay),
θ: intercept angle, TER: descent command signal,
Ra ... resistance, Ca ... capacitor, BR ... fall time monitoring relay,
DR: Own weight lowering relay, Sl: Lowering stop position information, Su: Lifting stop position information,
Pm: Motor rotation information, Sm: Motor rotation command, Sc: Relay verification signal,
Sd ... Failure presence / absence notification signal, Er ... Relay failure notification, Ec ... Regenerative resistance disconnection notification

Claims (8)

A motor for raising and lowering the barrier rod, a motor drive circuit for rotationally driving the motor, and a motor rotation command to the motor drive circuit in response to a lowering command signal received from the outside, thereby controlling the elevation of the barrier rod And an electronic control circuit that performs failure diagnosis of its own circuit, and a relay that is always in operation, and the operation state is determined if the interrupting rod reaches the descent stop position within a predetermined time after the descent command signal instructs descent. The fall time monitoring relay that is maintained but restored when it does not reach, and the relay that is always in operation, and when the fall time monitoring relay is restored, the electronic control circuit is restored when a failure diagnosis result is given, and In an electronically controlled level crossing breaker equipped with a self-weight drop relay that causes the motor drive circuit to reduce the weight of the shut-off rod by stopping the motor drive,
Relay monitoring means for performing the trial to temporarily recover the fall time monitoring relays intermittently is provided in the electronic control circuit,
The relay monitoring means to that electronic controlled crossing cut off machine, characterized in that said attempt the blocking rod is performed when coming to elevated stop position. A motor for raising and lowering the barrier rod, a motor drive circuit for rotationally driving the motor, and a motor rotation command to the motor drive circuit in response to a lowering command signal received from the outside, thereby controlling the elevation of the barrier rod And an electronic control circuit that performs failure diagnosis of its own circuit, and a relay that is always in operation, and the operation state is determined if the interrupting rod reaches the descent stop position within a predetermined time after the descent command signal instructs descent. The fall time monitoring relay that is maintained but restored when it does not reach, and the relay that is always in operation, and when the fall time monitoring relay is restored, the electronic control circuit is restored when a failure diagnosis result is given, and In an electronically controlled level crossing breaker equipped with a self-weight drop relay that causes the motor drive circuit to reduce the weight of the shut-off rod by stopping the motor drive,
Relay monitoring means for performing the trial to temporarily recover the fall time monitoring relays intermittently is provided in the electronic control circuit,
The relay monitoring means examines the operating state of the self-weight drop relay during the trial and determines that the self-weight drop relay and the drop time monitoring relay are normal when the self-weight drop relay is restored. It is determined that the relay control circuit including the self-weight drop relay has failed when not recovered, or the operation state of the self-weight drop relay and the drop time monitoring relay is checked during the trial, and the self-weight drop relay and When both the fall time monitoring relays are restored, it is determined that both the own weight fall relay and the fall time monitoring relay are normal, but when either or both of the own weight fall relay and the fall time monitoring relay are not restored. It is determined that the relay control circuit including the self-weight drop relay and the drop time monitoring relay has failed. It characterized in that the electronic control type crossing cutoff machine.   3. The electronically controlled level crossing breaker according to claim 2, wherein the relay monitoring means issues a failure notification or alarm to the outside when it is determined that the relay control circuit has failed during the trial.   The relay monitoring means performs forced lowering control for lowering the interrupting bar regardless of an instruction of the lowering command signal when it is determined that the relay control circuit has failed during the trial. An electronically controlled railroad crossing breaker according to claim 2 or claim 3. 5. The electronically controlled level crossing cutoff according to claim 2 , wherein the relay monitoring unit performs the trial when the cutoff bar is at a rising stop position. 6. Machine. A motor for raising and lowering the barrier rod, a motor drive circuit for rotationally driving the motor, and a motor rotation command to the motor drive circuit in response to a lowering command signal received from the outside, thereby controlling the elevation of the barrier rod And an electronic control circuit that performs failure diagnosis of its own circuit, and a relay that is always in operation, and the operation state is determined if the interrupting rod reaches the descent stop position within a predetermined time after the descent command signal instructs descent. The fall time monitoring relay that is maintained but restored when it does not reach, and the relay that is always in operation, and when the fall time monitoring relay is restored, the electronic control circuit is restored when a failure diagnosis result is given, and In an electronically controlled level crossing breaker equipped with a self-weight drop relay that causes the motor drive circuit to reduce the weight of the shut-off rod by stopping the motor drive,
Relay monitoring means for performing the trial to temporarily recover the fall time monitoring relays intermittently is provided in the electronic control circuit,
A regenerative resistor is provided in the motor drive circuit to dissipate the electromotive force of the motor and brake the weight drop of the breaking rod when the dead weight of the breaking rod is lowered, and the relay monitoring means The lowering state of the barrier rod at that time is examined, and the lowering state is compared with the normal lowering state stored in advance, and the difference between the two states is within an allowable range. It is determined that the regenerative resistor is not disconnected when it is within the range, but if not, the regenerative resistor is determined to be disconnected.
You wherein electronic controlled crossing breaker that. A regenerative resistor is provided in the motor drive circuit to dissipate the electromotive force of the motor and brake the weight drop of the breaking rod when the dead weight of the breaking rod is lowered, and the relay monitoring means The lowering state of the barrier rod at that time is examined, and the lowering state is compared with the normal lowering state stored in advance, and the difference between the two states is within an allowable range. and said regenerative resistor when is otherwise determined that not disconnected adapted to determine that the regenerative resistor is disconnected, the claims 2 to 4, characterized in that when it is seated in An electronically controlled railroad crossing breaker described in any of the above. The electronic control system according to claim 6 or 7 , wherein the relay monitoring means issues a disconnection notification or an alarm to the outside when it is determined that the regenerative resistor is disconnected during the trial. Railroad crossing breaker.

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