JP6572944B2 - Breaker detection device - Google Patents

Description

  The present invention relates to a break detection device for a level crossing barrier, and more particularly to a break detection device for a level crossing barrier that can be easily added to a break of an existing circuit breaker.

The breaker of the breaker installed at the railroad crossing is often folded by a passing vehicle, etc., and if the person passes through the place after it is folded, the original blocking function will not be fulfilled, leading to an accident Therefore, it is necessary to find this as soon as possible in the event of breakage, and take measures such as replacement work and traffic control.

As a discovery method, an ultrasonic transmitter or a radio transmitter is installed at the base of the cocoon, a reflector is provided at the heel tip, and this reflection is reflected at the heel tip. There is a method for recognizing that a wrinkle has been broken and sending an alarm when a wave cannot be detected. ([Non-Patent Document 1], [Patent Document 4], [Patent Document 13])

However, these methods require that a transmitter and a sensor be installed in the inside of the barrier, which cannot be added to existing facilities, and requires replacement of the barrier.

However, in addition to the one that is made of a single rod, the shield rod is extended by connecting multiple rods, the upper half is bent, the tip is always kept horizontal, and the root is semi-fixed with a spring. There are various types such as those that can be restored by the force of the spring even if bent at the root, and the lengths are also different, so it is realistic to prepare several types of dedicated barriers in advance and replace them on site is not.

Alternatively, a conductive wire is attached to the surface of the ridge, folded at the tip, connected to a power source or current sensor at the base, and the change in the current flowing through the conductive wire is measured, and the power consumed by the conductive wire is measured, Some of them report that the conductive wire is broken and the flaw is broken when it becomes zero. (Patent Document 8)

However, this method is easy to detect when the tip of the barrier rod is broken and completely separated, but it is difficult to detect it when it is bent slightly, and the conductive wire attached to the surface contacts the car. If it is scraped off, there is a possibility of detecting an abnormality even if there is no problem with the blocking rod itself.

Alternatively, an inclination sensor is attached to the tip of the bag, and the open / close state of the circuit breaker and the tilt signal output of the sensor are compared, and if the inconsistent state continues for a certain period of time, there is a report that the bag is broken. (Patent Document 14)

However, this method cannot be used in the case of the refraction method because the tip of the heel is horizontal. Further, since only binary values of the horizontal normal state and the vertical state are seen, it is easy to judge in the case of complete break separation of the barrier rod, but it is difficult to detect when it is bent several tens of degrees.

In this method, it is necessary to take out an operation signal from the main body of the circuit breaker, and considering the fact that there are various types of circuit breaker controllers, it is not easy to remodel on site.

The following summarizes the prior art documents, their contents, and the reasons why they cannot be used.

Japanese Patent No. 3126789 Japanese Patent No. 4430379 Japanese Patent No. 5635808 Japanese Patent Application 1989-063669 Japanese Patent Application No. 2000-125581 Japanese Patent Application No. 2000-355593 Japanese Patent Application 2001-305223 Japanese Patent Application No. 2006-049423 Japanese Patent Application No. 2007-093068 Japanese Patent Application No. 2008-083818 Japanese Patent Application No. 2010-175061 Japanese Patent Application No. 2010-203441 Japanese Patent Application No. 2010-209533 Japanese Patent Application No. 2014-216747

Shokai 60-113267

  (Non-Patent Document 1) A reflecting member is provided at the tip of a hollow barrier, and an ultrasonic wave is transmitted from the base of the barrier and the reflected wave is captured by the sensor, so that the barrier is in a normal state. The method of confirming is described. However, this method cannot be used while the barrier rod is shaken and the rod is bent. That is, there is a possibility of false detection when a child shakes a kite during strong winds or shut off. Further, since the barrier bar itself needs to be processed and the width of the railroad crossing and the barrier method differ depending on the installation location, it is necessary to prepare a replacement barrier bar corresponding to all the barrier bars of different standards.

  In (Patent Document 1), in the non-blocking state where the blocking rod is raised, the light reflecting sheet attached to the tip of the blocking rod reflects the infrared rays of the infrared light source mounted on a pillar different from the blocking device, A method is described in which the reflected light is detected by an infrared sensor provided separately to determine whether the cocoon is upright and to determine whether it is normal compared to the original operating state of the cocoon. However, this method detects a broken state even if the heel itself is not broken if it is bent largely to the track side by a car or the like when shutting down or climbing and does not fit in the sensor part of another pillar with a detection part there is a possibility.

  (Patent Document 2) describes a method of determining the breakage of a barrier rod by checking the weight after detecting the impact using a weight sensor for detecting the weight of the barrier rod and an impact sensor for detecting an impact on the barrier rod. It has been. However, this method can detect when the barrier rod breaks and completely separates because the weight becomes light, but cannot detect when it is simply bent. Even in the case of snow, the weight changes, so even if it breaks, there is a possibility that it cannot be detected without knowing it.

  (Patent Document 3) describes a method in which an RFID is attached to each part of a bag and a breakage is determined by whether or not the RFID can be read by a reader attached on another pillar. However, this method cannot be detected unless the blocking rod is completely upward. In addition, there is a possibility of erroneous detection when the barrier rod is bent due to strong winds or the like. The response distance of RFID is not accurate because its width is quite large, and the reaction distance may change in the case of heavy rain or snowfall, and it seems to lack accuracy.

(Patent Document 4) discloses a method of attaching an ultrasonic transmitter to the base of a hollow portion of a blocking rod, detecting a reflected light at the tip with a sensor at the base, and determining that the signal is broken if reception is impossible, and tip Describes a method of detecting the presence or absence of breakage by installing a sensor on the tip and detecting an ultrasonic wave at the tip of the heel. This is the same method as (Non-Patent Document 1) regarding the detection of the reflected wave. As for detection with a sensor attached to the tip, it is necessary to install the sensor inside the barrier rod, so it is not possible to pierce the barrier rod on site and work by replacing the barrier rod.
In that case, since the width of the railroad crossing and the blocking method are different depending on the installation location, it is necessary to prepare a replacement barrier for all types of barriers with different standards, which is not practical. In addition, there is a possibility of false detection when there is a strong wind or when a child shakes a kite when shut off.

  In (Patent Document 5), a rod-like object (long like a pencil core that breaks when bent) is attached in a hollow cage, and when the breaking rod is bent and broken, the lower half is pushed up by a spring, and the movement makes contact A method for detecting anomalies by entering is described. However, in this method, when the blocking rod is bent by a strong wind or the like, even if the rod itself is not broken, only the rod-like object may be broken and erroneously detected. If the barrier rod breaks, it seems that the internal rod-shaped object is broken because it is weaker than the rod, but the rod-shaped material does not break even though the rod is already broken, or the rod-shaped material breaks before the rod. Any of these will lead to false detection. It seems difficult to expect it to break at exactly the same time as the kite.

  (Patent Document 6), a GPS sensor is provided at the tip of a breaking rod that rotates with respect to the breaker body via a rotation shaft, and the position of the tip is measured by the GPS sensor. A method is described in which whether or not the position of the part is within a predetermined range is determined by the abnormality presence / absence determining means, and if it is within the predetermined range, it is normal, and if it is not within the predetermined range, it is abnormal. However, the positional accuracy of the GPS has an error of about 10 m, and even when the GLONASS system is used together, the error is only about a few meters. In order to measure with accuracy of several centimeters, it is necessary to receive radio waves for several hours or more, or to perform positioning with radio waves from a reference station provided on the ground, both of which are unrealistic.

  (Patent Document 7) discloses a detection unit that detects that the barrier rod is closed in a horizontal state, a transmitter that transmits electromagnetic waves on the distal end side of the barrier rod, and an electromagnetic wave from the transmitter of the closed barrier rod. Is provided with a receiving unit for receiving. This is a breakage detection method for a breaker for a breaker that is often found in a simple breaker such as a small scale railroad crossing or coin parking, but it is not normally detected because breakage can only be detected when the breaker is in a horizontal position. In the case of a breaker in a shut-off state, there is a problem that an abnormality cannot be detected until the train approaches and becomes a shut-off state.

(Patent Document 8) describes a method in which a conductive member is affixed intermittently, and the presence or absence of breakage is determined by detecting a change in current and a change in power consumption due to a change in resistance value. However, the material of the conductor is written as conductive paint, conductive resin film, foil or wire of metal such as aluminum or copper, and it can be detected when the barrier is completely cut, but it is slightly bent. It seems that the detection is not certain if it is only done.

  (Patent Document 9), in a crossing barrier that emits a predetermined alarm sound when the barrier rod descends, a microphone as an alarm sound detecting means for detecting an alarm sound is arranged inside and outside the barrier rod, A method is described in which a level difference detection circuit as a judging means and a breakage detection relay detect breakage of a barrier and a railroad crossing alarm sound generator based on an alarm sound detected by an inner microphone and an outer microphone. Yes. However, this method seems to eliminate the difference in volume between the inside and outside when the breaker folds and opens, but if it remains bent without bending, there is no significant change in the volume difference, and therefore the bending of the breaker cannot be detected. I think that the.

(Patent Document 10) describes a method of determining breakage from the relationship between the position of the blocking rod and the torque provided with means for detecting the raising / lowering position of the blocking rod and means for detecting the torque of the blocking rod. However, with this method, there is a possibility that even if the blocking rod catches on something, it may react and falsely detect, and it is not immediately known whether it is bent or not, so it will take a certain time for the torque to stabilize. However, it is difficult to distinguish between the case where the tip of the shield rod is broken and lightened, and the case where the torque required for rotation is reduced due to lubricant being injected into the rotating gear part during maintenance etc. Seems to be.

  (Patent Document 11) describes a method for determining breakage of a breaking rod depending on whether or not the approximate function of the time series data of the current value of the electric motor when the breaking rod operates deviates from the allowable determination range. Yes. However, in this method, in the case of a breaking rod that can be returned by a spring, if the automobile or the like touches the rod and the portion of the spring that can be bent at the base of the breaking rod is bent temporarily, the rod itself is not broken. There is a possibility that the overload of the motor may be detected temporarily, and it is doubtful whether it can be detected only when the bag part is really broken. In addition to the spring method, there is a slit type (a method in which a vertical cut is made so that the heel flexes flexibly). Even in such a case, even if a vehicle or the like touches the bag and temporarily applies a load, the vehicle can often be restored without breakage, so that breakage may be erroneously detected. In other words, if the heel bends in contact with something and the current value of the motor changes, it can be judged whether it is due to mere bending of the heel or whether the heel is bent or bent irreversibly. Have difficulty.

(Patent Document 12) includes a photographing device mounted on a train, a transmitter provided in a railroad crossing breaker, and a determination device that performs breakage determination of a barrier based on a captured image by the photographing device. A breakage breakage decision support system is described.
When the train passes near the railroad crossing barrier, the photographing device takes a picture of the railroad crossing barrier and stores and stores it as shooting data. Is input to the determination device, and it is described that the determination device determines the breakage of the crossing barrier of the level crossing barrier installed on the route on which the train travels based on the shooting data captured from the shooting device. However, in this method, there are some railroad crossings without night lighting, and there may be automobile lights, so it seems that automatic recognition of the state of the barrier is considerably difficult. It is also difficult to capture the image of the circuit breaker close to the vehicle without blurring while traveling at high speed. If a person waiting for a level crossing makes a yellow bag or the like stagger, the difficulty of judging the state of a barrier is expected to increase further. In addition, the determination is made after the end of the day's business operation, and it is also difficult to be responsive.

  (Patent Document 13) describes a method in which a rotating blade is attached to the end of the hollow portion of the heel and constantly rotated, and a radio wave is applied to the blade to recognize the rotation speed of the blade from the change in the reflected wave. . If the tip breaks, the reflected wave disappears and it can be detected, but this method also superimposes the change due to the rotation on the change in the reflected wave due to the rotation while the blocking fence is shaken and the hook is bent. Therefore, it is difficult to determine the presence or absence of breakage. In addition, a system having a part that is always movable is not practical because it cannot be used continuously for a long time due to wear of the movable part.

  (Patent Document 14) is composed of a parent device and a child device, and when the child device detects a change in the tilt state, the parent device notifies the parent device and the parent device determines the validity of the state change of the child device from the presence or absence of a breaker operation signal. A method for confirming and determining the presence or absence of breakage is described. However, in this method, since the determination is made only with the binary information of the horizontal state or the vertical state of the blocking rod, the determination cannot be made in a state where it is bent several tens of degrees. In addition, the refraction type breaker cannot be used for determining the breakage state of the tip portion.

  As described above, the existing technology can detect when the cutting edge is completely cut or almost closed, but it can be detected when it is bent several tens of degrees. There are many things that cannot be done. In addition, if the sensor is built inside the bag, it must be done from the process of the bag, which is not appropriate for the site. In addition, the position of the tip of the heel is measured by GPS to determine whether the heel is broken or not, such as that which is not practical in terms of positioning accuracy, or that detects a slight change in the torque of the motor. Some of them are likely to be doubtful about the accuracy of the judgment results.

In view of these points, the problem to be solved by the present application is to provide a breakage breakage detecting device that can be easily installed on various types of breakage for crossings at the site and has a low possibility of erroneous determination. There is.

  The inventor of the present application studied the use of a sensor network that can measure the degree of inclination and transmit information. Each sensor unit, which is a network element, stores data on the measurement result of the heel number and heel inclination to which it is attached. Each sensor unit sends information to the controller, and the controller analyzes the information sent from each sensor unit, and the values indicating the inclination state are almost the same among multiple sensor units attached to the same cage. Make sure that

If the values indicated by the plurality of inclination sensor portions are substantially the same within a separately set time width, it is determined that there is no breakage between the plurality of sensor portions of the barrier rod, or two sensors between them The angle between the acceleration vectors observed in the unit is calculated, and if it is below a separately set threshold value and is close to 0 degrees, it is determined that there is no breakage.

In the case of a refracting-type shield rod, it is assumed that there are two rods, that is, a rod at the root portion and a rod at the tip portion, and the sensor part is attached to the root portion and the tip portion of each rod.

The tilt sensor unit uses a 2-axis or 3-axis acceleration sensor, measures gravity acceleration data on the X-axis, Y-axis or X-axis, Y-axis, and Z-axis, respectively, and determines the sensor tilt based on that data. Obtain by calculation.

If the acceleration vectors obtained from the two sensor units are (A ₁ , A ₂ , A ₃ ) and (B ₁ , B ₂ , B ₃ ), and the angle between the acceleration vectors is Δθ, then Δθ is two. The angle formed by the vectors is obtained by equation (1).

Δθ = Cos ⁻¹ [(A ₁ · B ₁ + A ₂ · B ₂ + A ₃ · B ₃ ) / √ {(A ₁ ² + A ₂ ² + A ₃ ² ) · (B ₁ ² + B ₂ ² + B ₃ ² )} ]
(1)

Even Each sensor be facing any direction in a stationary state and takes gravitational acceleration same size (including the gravitational acceleration) since it is to receive an acceleration error of the measuring system epsilon ₁ and the following (2) The formula holds.

| (A ₁ ² + A ₂ ² + A ₃ ² ) − (B ₁ ² + B ₂ ² + B ₃ ² ) | <ε ₁ (2)

Since the condition of equation (2) is satisfied when the blocking rod is stationary regardless of whether it is broken, equation (2) is a condition that indicates that the rod is stationary or not broken. It can be said that there is. However, when the heel is broken and the sensor at the tip is separated, the signal from the sensor cannot be received in the first place, so it is not necessary to consider the condition of the equation (2).

When the formula (2) is established, the value of Δθ can be approximated by the following formula (3) in which the √ calculation is omitted in the calculation of the formula (1).

Δθ≈Cos ⁻¹ [(A ₁ · B ₁ + A ₂ · B ₂ + A ₃ · B ₃ ) / (A ₁ ² + A ₂ ² + A ₃ ² )] (3)

If blocking rod is normal for a sufficiently small value epsilon ₂ (4 type) is established to set separately the Δθ (3) below.

Δθ <ε ₂ (4)

When the bag is stationary, the acceleration received by the sensor unit is only the gravitational acceleration G [m / s ² ], and therefore can be placed as shown in equation (5).

A ₁ ² + A ₂ ² + A ₃ ² = G ² (5)

If the value of cos (Δθ) in the determination limit value of Δθ for determining that the heel is not bent is set as α (0 <α <1), Equation (6) holds in a state where it can be determined that the heel is bent. ,

A ₁ · B ₁ + A ₂ · B ₂ + A ₃ · B ₃ <α · G ² (6)

Only the condition of the equation (6) is confirmed, and if this lasts for a certain time T [sec] or more, it may be reported.

When the barrier rod is in a horizontal state, the direction of gravity with respect to the sensor attached to the tip does not change even if the tip of the barrier rod moves in a horizontal plane. However, although it cannot be detected at that time, it can be detected when the circuit breaker is rising or fully raised.

In addition, the normal barrier rod is designed to rise upward when it is pushed and bent in the horizontal direction, so when it is pushed and bent in the horizontal direction, the entire rod does not stay in the horizontal plane, and the direction of gravity changes. Is detectable.
Therefore, the acceleration sensor only needs to be able to detect the acceleration in a plane in which the normal barrier rod moves, so that the acceleration sensor may be a biaxial one.
In the case of a biaxial acceleration sensor, equation (6) becomes equation (7).

A ₁ · B ₁ + A ₂ · B ₂ <α · G ² (7)

In addition, as a simpler method, the bending angle for determining the bending can not be specified. However, as a method of only detecting that there is a change, each of the methods is not limited to (7) or (8). The presence or absence of a change in the value of gravitational acceleration detected by the sensor may be detected based on the difference in acceleration for each axis of the sensor.

Sunawachi, was calculated following Equation (8), over the S _{1, S 2,} one of the values of S ₃ is given time (or a predetermined sample number of times), (9) separately set as Formula If β · G is exceeded by using the threshold value β, it is determined that there is an abnormality.

_{S 1 = | A 1 -B 1} |, S 2 = | A 2 -B 2 |, S 3 = | A 3 -B 3 | (8)
S ₁ > β · G, S ₂ > β · G, or S ₃ > β · G (9)

Although this method above cannot specify the bend angle of the heel when issuing a report, it can be easily realized because it can be detected with a simple calculation that the difference in inclination between the heel sensors exceeds the allowable value. It is.

In these determination methods, it is necessary to confirm that the same state continues for a certain time T [sec], excluding erroneous determinations when the breaker is operating or swaying in the wind. Because.

In view of the above, the breakage breakage detecting device of the present application includes a plurality of sensor units that detect the inclination of the crossing breakage of a crossing, and a detection unit that receives data from the sensor unit and determines whether the breakage of the breakage bar is broken. And a reporting unit that receives information on detection results from the detection unit and outputs an alarm signal, and a power supply unit that supplies power to each unit. Using a three-axis or three-axis acceleration sensor, and detecting the change in the direction of gravity from the acceleration data of each axis detected by a plurality of sensor units to determine the presence or absence of breakage of the barrier, and the result Is output as an alarm.

The determination flow for the presence or absence of breakage breakage of the present application is as follows.
1. Confirm that data can be received from both the base and tip side of the heel.
If it cannot be received for a certain period of time, it is determined as abnormal.
2. Confirm that the condition of equation (2) is satisfied, and confirm that the accelerations observed between the two sensors attached to the same cage are almost the same.
If the condition of equation (2) is not satisfied even after a certain period of time, it is considered that the sensor is abnormal or the tip of the broken eyelid is swaying due to the influence of the wind.
4. In the case of a 3-axis sensor, calculate the value of equation (3) and use the result to check the condition of equation (6). In the case of a biaxial sensor, check the condition of equation (7). However, for simplicity, equation (8) may be calculated, and the result may be used to confirm that equation (9) holds.
5. 4. above. If the condition is not satisfied, it is determined that the blocking rod is bent, and an alarm is output from the reporting unit.
6). Wait for reception of the next data. Return to.

  On the other hand, two power supply lines are connected to the sensor unit from the power supply unit, but the information sent from the sensor unit to the reporting unit (in the same case as the power supply unit) is placed on the power supply line. to be sending.

  More specifically, with respect to the normal power supply current of more than a dozen [mA], a current exceeding that (for example, 20 [mA]) is always flowed separately from the power supply current, and the detector determines that there is a breakage. In this case, the current is cut to reduce the total value of the supply current to about half of the normal value, which is detected by the alarm unit and the alarm contact is output.

  Such a method as described above has an effect of reducing the amount of wiring to the sensor unit and simplifying the installation work in the field.

  In addition, the sensor units are inevitably connected by the two power supply wirings. In this application, a 1200 bps serial communication signal based on start-stop synchronization is superimposed on the sensor unit from the front end side to the base side. Acceleration measurement data is sent to the sensor unit.

  The detection unit is not actually hardware, but is present in the form of microcomputer software inside the sensor unit attached to the base of the barrier.

  As described above, the detection unit may be realized in the form of microcomputer software inside the sensor unit attached to the base part of the shut-off cage, or may be provided with dedicated hardware and attached to the reporting unit. .

When the power supply wiring to the sensor unit is cut, the information sent from the sensor unit to the reporting unit is interrupted. In this case, it is determined that there is an abnormality as described in the section “1.” of the flow.

  According to the present invention, as a matter of course, when the blocking rod is broken and completely separated, it is possible to reliably detect breakage even when the barrier is simply folded without being separated.

  In the present invention, it is only necessary to attach the two sensors, the controller, and the power line connecting between them to the monitoring fence to be monitored, and it is not necessary to remove or process the blocking fence itself. Since it is a structure that can be easily attached to an existing barrier rod, it is not necessary to prepare various types of barrier rods with attached sensors before the installation work on site.

  The sensor unit of the present invention can be attached to a refraction type breaker as shown in FIG.

As a measure to prevent breakage, if the base part of the heel is separated from the base, the connection is fixed by the tension of the spring installed around the heel, and the heel itself is prevented from being bent by bending the connection part, it is driven. In the method of judging from the information of the operation state of the part, it is not possible to determine whether the connection part for bending countermeasures is bent or whether the hook itself is bent, but according to the method of the present application, the sensor part can be attached to any place of the hook Therefore, it is possible to monitor breakage of the flange portion by attaching it before the connection portion.

Conceptual diagram Conceptual diagram for refraction type circuit breaker Block diagram of the entire system Sensor configuration (Head tip side) Sensor flow (2) and (4) Process flow diagram inside the microcomputer inside (Bridge root side) Sensor flow (1) and (3) Process flow in the internal microcomputer Figure 1 (Sputum root side) Sensor flow (1) and (3) Processing flow in the internal microcomputer Figure 2 Process flow diagram of the microcomputer inside the alarm unit Relationship diagram between alarm signal current and current of each part Alarm signal current, current value of each part and total value Example 1 of a breaking shield Example 2 of a bent shield

1 Circuit breaker drive
2 Sensor part (1)
3 Barrier
4 Sensor part (2)
5 Sensor power signal wiring
6 Power supply section and alarm section
7 Wiring the power and signal cables
8 Circuit breaker drive
9 Tip hook holding wire
10 Barrier
11 Sensor part (1)
12 Wiring for power supply signal for sensor
13 Sensor part (2)
14 Sensor part (3)
15 Sensor part (4)
16 Barrier
17 Power supply section and alarm section
18 Power and signal cable wiring
19 (Bottom side) Sensor part (1) and (3)
20 (Lead end side) Sensor part (2) and (4)
21 Detector
22 Power supply
23 Reporting Department
24 Power supply / reporting unit shared case
25 Sensor case at the base of the heel
26 Sensor case on the tip side of heel
27 Sensor section
28 X-axis acceleration sensor
29 Y-axis acceleration sensor
30 Z-axis acceleration sensor
31 Microcomputer
32 Communication interface
33 Communication line
34 Power supply
35 Internal load current measurement circuit
36 Detection result output circuit of detector
37 Root side sensor
38 Tip side sensor

  Hereinafter, embodiments of the present application will be described in detail. FIG. 1 is a conceptual diagram showing the entire system of the present application.

  FIG. 2 is a conceptual diagram showing the case of a refraction type breaker.

  Sensor part (1) and sensor part (3) are sensors located on the base side of each heel part, and sensor part (2) and sensor part (4) are sensors located on the tip side of each heel part. is there.

  When the sensor is mounted, the sensor is adjusted with the horizontal direction as the X axis and the vertical direction as the Y axis, for example. The Z axis is the direction perpendicular to the plane of FIG. When the tip of the heel is broken, the direction of gravity does not change, but since the sensor is tilted, the X-axis and Y-axis directions are tilted. Therefore, a gravitational acceleration component appears not only in the Y-axis but also in the X-axis direction.

FIG. 3 is a block diagram of the entire system.
The sensor part at the tip of the heel sends acceleration data in each axial direction to the detection part every N seconds. However, when the detection unit is realized by a microcomputer program in the base sensor of the cocoon, the data of the tip side sensor is sent to the base side sensor unit, and the microcomputer in the base side sensor determines whether or not there is a breakage. .

As a result of the above processing, when it is determined that there is a breakage, the detection unit sends a warning transmission command to the notification unit, and the notification unit issues a warning. This alarm transmission is realized by contact output, but an instrumentation signal, wireless means, or the like may be used.

FIG. 4 is a configuration diagram of the sensor unit. The sensor unit mainly includes an acceleration sensor for each axis, a microcomputer, and a communication interface. The detection unit is implemented by microcomputer software in the sensor unit on the base side of the cocoon.

FIG. 5 shows a processing flow in the microcomputer in the sensor part at the tip of the heel. The sensor part at the tip of the bag captures the data of the acceleration sensor and sends the data to the detection part at intervals of N seconds.

[FIG. 6] shows a processing flow in the microcomputer in the sensor units (1) and (3) on the base side of the cocoon.
Each sensor on the base side and tip side of the heel sends data to the detection unit, but since the detection unit is realized by the software of the microcomputer in the sensor unit on the base side, the sensor unit on the tip side is actually the root. Data is sent to the sensor unit on the side.

  If the data from the sensor unit on the base side and the sensor unit on the tip side cannot be acquired for a certain period of time (T [sec]), it is determined that the breakage breakage or the device is abnormal, and a notification is issued.

  If it can be acquired within a certain time (T [sec]), check the condition of equation (2), and confirm that the magnitude of gravitational acceleration received by both sensors is almost the same. Confirm that there is no contradiction in the data. If there is a contradiction, it is determined that the device is abnormal and a notification is issued.

  If there is no contradiction, check if the condition of the expression (6) is satisfied for the 3-axis sensor and the condition of the expression (7) is satisfied for the 2-axis sensor. If it is satisfied, the cosine of the bending angle is less than that value, so it is determined that the bending is greater than the threshold, and the alarm is issued.

  [FIG. 7] is a flowchart of a method of determining that there is a breakage when there is a difference in the gravitational acceleration detected by the sensor regardless of the bending angle.

  The above method is basically the same as the method based on the bending angle except for only the judgment formula. That is, first, when the data from the sensor unit on the base side and the sensor unit on the tip side cannot be acquired for a certain time (T [sec]), it is determined that the breakage of the breakage or the device is abnormal, and is reported.

Next, the condition of the formula (9) is confirmed using the result of the formula (8). If the sensor unit is an acceleration sensor biaxial omitted calculation for S _3. When the relationship of the formula (9) is established, it is determined that there is a breakage if the difference between the detected acceleration sensor units is large, and the state continues for a certain period of time.

  [FIG. 8] is a process flow diagram of the microcomputer in the alarm unit. The notification unit receives the notification command from the detection unit and outputs an alarm signal indicating that the breakage detection state is present. The alarm signal is output as a contact signal, but another communication method may be used.

  FIG. 9 is a diagram showing the relationship between the alarm signal current and the current of each part. From the power supply unit 34 to the root side sensor unit 37 1 [mA], from the judgment result output circuit 36 in the detection unit 20 [mA] as normal output of the breakage detection result, 1 [mA] to the tip sensor unit 38, In addition, a current of about 32 [mA] of 10 [mA] is supplied for communication between the sensor units. However, this communication current is a digital transmission signal such as an asynchronous serial signal, and is a current that fluctuates between 0 [mA] and 10 [mA] in a rectangular waveform.

  When breakage is detected, the current of 20 [mA] that is normally supplied is cut to 0 [mA] based on the determination result of the detection unit (usually software on the microcomputer in the base side sensor unit). As a result, the current value supplied from the power supply is about 12 [mA].

  The alarm unit monitors the current value, and outputs a contact when it falls below a certain value. In this case, the above-mentioned constant value is most appropriate to be an intermediate value 17 [mA] between the normal current minimum value 22 [mA] and the abnormal maximum current value 12 [mA].

[FIG. 10] shows the alarm signal current, the current value of each part, and the total value thereof. When the power supply line to the tip side sensor unit is disconnected due to breakage, a communication error occurs, so the current of 20 [mA] that was normally supplied by the detection unit is cut to 0 [mA].

Naturally, the current consumption at the tip side sensor unit is also zero, and in this case, the total value of the current is only 1 [mA] consumed by the base side sensor unit, and the above-mentioned constant value (for example, 17 Since it is lower than [mA]), contact is output from the alarm unit.

  As described above, in the present application, the determination result of the presence or absence of breakage is sent to the reporting unit in the form of a change in the load current superimposed on the power supply current.

  In the above method, a constant amount of current is passed during normal operation, and it is cut when abnormal. Therefore, the case where the current value of the power supply line is smaller than the determination threshold is set as an abnormal state. Therefore, it can be similarly determined that the power line is disconnected due to breakage of the tip of the blocking bar.

  If the power supply line is twisted and short-circuited when the tip part breaks, the fuse in the power supply part is melted and the current becomes zero.

  In this regard, in the case of an abnormality, the idea is to reverse the method of notifying the abnormality by increasing the current value, but according to the method of the present application described above, the abnormality determination in the case of a power line disconnection is the same as the abnormality determination based on the bending angle There is a merit that can be summarized in the result of a decrease in power supply current, and measurement and determination at the reporting unit are easy.

  By the way, in practice, the barrier rod is not completely separated even if it is broken, and it is often in a bent state.

[FIG. 11] and [FIG. 12] show examples of broken barrier rods. Even if the breaking rod is folded, the broken tip does not necessarily separate, so the weight of the rod does not change, and in the case of a slight bending method such that the tip is bent as in the case of [FIG. The torque of the drive motor is almost unchanged.

In such a case, when the method of the present application in which a plurality of acceleration sensors are attached to the ridge and the breakage is detected by the difference in acceleration between the sensors, it is possible to more accurately detect that the blocking ridge is bent.

Claims (7)

A plurality of sensor units for detecting the inclination of the crossing bar at the level crossing, a detection unit for receiving data from the sensor unit to determine whether the barrier bar is broken, and receiving detection result information from the detection unit. The alarm unit that outputs alarm signals and the power supply unit that supplies power to each unit,
  When a plurality of sensor units are attached to a crossing fence of a level crossing and the difference in inclination between the sensor parts attached to the same barrier fence exceeds a separately set allowable value for more than a certain time, Breakage breakage detection device characterized by breaking and reportingAnd Sen It is characterized by using a 2-axis or 3-axis acceleration sensor in the server part, The acceleration vector obtained from the two sensor parts A and B attached to the tip (A ₁ , A ₂ , A ₃ ) And (B ₁ , B ₂ , B ₃ ) And the condition of (Equation 1) is passed for a certain time T [sec] If it is satisfied, it will be judged that there is a breakage in the breaker, and a breakage breakage detection will be reported apparatus.
  However, Δθ ₁ Is less than this, the angle difference between the sensor parts provided to judge that there is no breakage This is a determination threshold value. (If the sensor is a 2-axis acceleration sensor, the third axis Measurement A ₃ , B ₃ About A ₃ = B ₃ = 0. )
 
Δθ ₁ <Cos ^-1 [(A ₁ ・ B ₁ + A ₂ ・ B ₂ + A ₃ ・ B ₃ ) / √ {(A ₁ ² + A ₂ ² + A ₃ ² ) ・ (B ₁ ² + B ₂ ² + B ₃ ² )}] (Formula 1)
  The breakage breakage detecting device according to claim 1, wherein when the sensor attached to the base and tip of each bag is a triaxial acceleration sensor, the sensor part A attached to the root and the sensor attached to the tip The acceleration vector obtained from the part B is (A ₁ , A ₂ , A ₃ ) and (B ₁ , B ₂ , B ₃ ), and the condition of (Formula 2) is satisfied for a certain time T [sec]. When the condition of (Formula 3) is also satisfied for a certain time T [sec], it is determined that the breaking rod is broken and an alarm signal is output. However, epsilon ₁ is the square of the threshold error range to be set in order to determine that substantially equal the magnitude of the acceleration experienced by the two sensors, alpha is the [Delta] [theta] ₁ in claim 1 cosine cos ([Delta] [theta] ₁₎ G is gravity acceleration.

| (A ₁ ² + A ₂ ² + A ₃ ² ) − (B ₁ ² + B ₂ ² + B ₃ ² ) | <ε ₁ (Formula 2)

A ₁ · B ₁ + A ₂ · B ₂ + A ₃ · B ₃ <α · G ² (Formula 3)
3. The breakage breakage detecting device according to claim 1 and claim 2 , wherein when the sensor attached to the base and tip of each bag is a biaxial acceleration sensor, the sensor part A and the tip attached to the root (A ₁ , A ₂ ) and (B ₁ , B ₂ ) are used as the acceleration vectors obtained from the sensor unit B attached to, and the condition of (Equation 4) is satisfied for a certain time T [sec]. A breakage breakage detection device characterized in that if the condition of (Equation 5) is also satisfied for a certain time T [sec], it is determined that breakage of the breakage is present and an alarm signal is output. However, ε ₁ is a square value of a threshold value of an error range set to determine that the magnitudes of accelerations received by the two sensors are substantially equal, and α is set as A ₃ = B ₃ = 0 in claim 1 the value of the cosine cos of [Delta] [theta] ₁ in (equation 1) ([Delta] [theta] ₁₎ of the case has, G is the gravitational acceleration.

| (A ₁ ² + A ₂ ² ) − (B ₁ ² + B ₂ ² ) | <ε ₁ (Formula 4)

A ₁ · B ₁ + A ₂ · B ₂ <α · G ² (Formula 5)
The breakage breakage detecting device according to claim 1, wherein when the sensor of the sensor unit attached to the base and tip of each bag is a triaxial acceleration sensor, the sensor is attached to the sensor unit A and the tip attached to the base. The acceleration vector obtained from the obtained sensor unit B is (A ₁ , A ₂ , A ₃ ) and (B ₁ , B ₂ , B ₃ ), and the acceleration difference of each axis defined in (Formula 6) is constant. A breakage breakage detecting device that determines that breakage of a breakage is present and outputs an alarm signal when at least one of (Equation 7) is satisfied for a time T [sec]. However, β is a positive constant arbitrarily defined (0 <β <1), and G is gravitational acceleration.

S ₁ = | A ₁ −B ₁ |, S ₂ = | A ₂ −B ₂ |, S ₃ = | A ₃ −B ₃ | (Formula 6)

S ₁ > β · G, S ₂ > β · G, or S ₃ > β · G (Formula 7)
The breakage breakage detecting device according to claim 1, wherein when the sensor of the sensor unit attached to the base and the tip of each bag is a biaxial acceleration sensor, the sensor is attached to the sensor part A and the tip attached to the base. The acceleration vectors obtained from the obtained sensor part B are (A ₁ , A ₂ ) and (B ₁ , B ₂ ), and the acceleration difference of each axis defined in (Formula 8) is constant for a certain time T [sec]. A breakage breakage detection device that determines that breakage of a breakage is present and outputs an alarm signal when at least one of (Equation 9) is satisfied. However, β is a positive constant arbitrarily defined (0 <β <1), and G is gravitational acceleration.

S ₁ = | A ₁ −B ₁ |, S ₂ = | A ₂ −B ₂ | (Formula 8)

S ₁ > β · G or S ₂ > β · G (Formula 9)

A shut-off rod breakage detection device according to claims 1 to 5, the alarm signal is determined detector when a signal from the sensor can not be received for more than a predetermined time with the possibility chromatic breakage of the blocking rod A breakage breakage detecting device characterized in that
The breaker breakage detecting device according to any one of claims 1 to 6 , wherein the breaker rod shares a power line for the sensor and a communication line for carrying information detected by the sensor. Breakage detection device.