State monitor

Abstract

To determine that adhesion force of a tongue rail against a basic rail is improper without necessity for an exclusive sensor, etc.SOLUTION: A state monitor 1 as a state monitor of a switch 10 for carrying out changeover action by drive force of a motor 12 determines whether or not a partial waveform in adhesion step among time-sequence torque waveform data of the motor 12 fulfills a prescribed torque excessive condition, determines whether or not the detection result of a lock sensor 16 for detecting a lock deviation amount provided on the switch 10 fulfills a prescribed deviation minimum condition, and determines whether adhesion force of a tongue rail against a basic rail is excessive / too little based on these determination results.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present invention relates to a point condition monitoring device. [Background technology]

[0002] For the safety of train operations in railways, it is necessary to detect abnormalities that could lead to the inability of a point machine to switch at an early stage. An example of a point machine abnormality that should be detected is inadequate contact force, where the contact force of the tongue rail with the base rail is too strong or too weak. As a method for detecting inadequate contact force, Patent Document 1 describes a method using a jaw pin with a sensor that measures the operating load, and Patent Document 2 describes a method using a strain sensor attached to a switch adjuster. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Publication No. 2020-6895 [Patent Document 2] Japanese Patent Publication No. 2022-91231 Summary of the Invention [Problem to be solved by the invention]

[0004] However, the above-mentioned method using measurement sensors measures the operating load, which may correspond to the adhesion force, and the distortion of the switch adjuster. This requires the installation of new measurement sensors, and since there are many points to be monitored, the cost of installing and maintaining new sensors is significant. Furthermore, the jaw pins on which the load measurement sensors are installed and the switch adjusters on which the distortion sensors are installed vibrate as the train runs, which is a drawback in that these sensors have a short lifespan.

[0005] The problem to be solved by the present invention is to provide a technology that enables detection of inadequate adhesion of a tongue rail to a base rail without requiring a dedicated sensor or the like. [Means for solving the problem]

[0006] The first invention to solve the above problem is: A status monitoring device for a point machine that performs switching operation by the driving force of a motor, an excessive torque determination means (for example, the excessive torque determination unit 202 in FIG. 5) for determining whether a partial waveform in the contact stroke of the time-series torque waveform data of the motor satisfies a predetermined excessive torque condition; an inadequate contact force determining means (for example, the inadequate contact force determining unit 210 in FIG. 5) for determining that the contact force of the tongue rail to the base rail is excessive based on the determination result of the excessive torque determining means; The condition monitoring device is provided with:

[0007] According to the first invention, it is possible to detect inadequate adhesion of the tongue rail to the base rail without requiring a dedicated sensor or the like. That is, the motor torque in the adhesion process of bringing the tongue rail into contact with the base rail during the switching operation of the point machine is changed to increase significantly due to the repulsive force if the adhesion force is excessive. The motor torque is estimated from the motor voltage and motor current measured by the existing voltage and current sensors. Therefore, it is not necessary to provide a dedicated sensor to detect inadequate adhesion of the tongue rail. It is possible to detect excessive adhesion of the tongue rail by using the measurement results of sensors provided for different purposes, such as the motor current sensor and voltage sensor.

[0008] The second invention is the above-mentioned invention, a deviation amount insufficient determination means (for example, the deviation amount insufficient determination unit 204 in FIG. 5 ) that determines whether or not a detection result of a lock sensor that detects a lock deviation amount provided on the point machine satisfies a predetermined deviation amount insufficient condition; Further provided with The contact force inadequacy determination means determines that the contact force of the tongue rail to the base rail is insufficient based on the determination result of the deviation amount insufficiency determination means. It is a condition monitoring device.

[0009] According to the second invention, it is possible to detect insufficient contact force of the tongue rail to the base rail without requiring a dedicated sensor or the like. In other words, the locking deviation detected by the lock sensor corresponds to the positional deviation of the notch of the locking pin relative to the lock piece. When the contact force is insufficient, the tongue rail cannot be displaced to its normal position, and the locking pin, which displaces with the displacement of the tongue rail, also cannot be displaced to its normal position, resulting in a small locking deviation. The locking deviation is detected by an existing lock sensor. Therefore, it is possible to detect insufficient contact force of the tongue rail using the detection result of a sensor provided for a different purpose, such as a lock sensor.

[0010] The third invention is the above-mentioned invention, The contact force inadequacy determination means determines that the contact force of the tongue rail with respect to the base rail is excessive when the torque excessive determination means makes an affirmative determination and the deviation insufficient determination means makes a negative determination. It is a condition monitoring device.

[0011] According to the third aspect of the present invention, it is possible to appropriately determine whether the contact force of the tongue rail to the main rail is excessive. That is, when the contact force is excessive, the motor torque in the contact stroke of the switching operation in which the tongue rail is brought into contact with the main rail changes so as to increase significantly due to the repulsive force. On the other hand, when the contact force is insufficient, such a change does not occur. Furthermore, the locking displacement detected by the lock sensor corresponds to the positional deviation of the notch of the locking pin relative to the lock piece. When the contact force is insufficient, the tongue rail cannot be displaced to its normal position, and the locking pin, which displaces with the displacement of the tongue rail, also cannot be displaced to its normal position, resulting in a small locking displacement. On the other hand, when the contact force is excessive, such a state does not occur. Therefore, when the partial waveform in the contact stroke of the motor's time-series torque waveform data satisfies the predetermined excessive torque condition and the locking displacement detected by the lock sensor does not satisfy the predetermined insufficient displacement condition, it is possible to determine that the contact force of the tongue rail is excessive.

[0012] A fourth aspect of the present invention is the above-mentioned invention, The contact force inadequacy determination means determines that the contact force of the tongue rail with respect to the base rail is insufficient when the torque excessive determination means makes a negative determination and the deviation insufficient determination means makes a positive determination. It is a condition monitoring device.

[0013] According to the fourth aspect of the present invention, it is possible to appropriately determine whether the contact force of the tongue rail to the main rail is insufficient. That is, when the contact force is excessive, the motor torque in the contact stroke of the switching operation in which the tongue rail is brought into contact with the main rail changes so as to increase significantly due to the repulsive force. On the other hand, when the contact force is insufficient, such a change does not occur. Furthermore, the locking displacement detected by the lock sensor corresponds to the positional deviation of the notch of the locking pin relative to the lock piece. When the contact force is insufficient, the tongue rail cannot be displaced to its normal position, and the locking pin, which displaces with the displacement of the tongue rail, also cannot be displaced to its normal position, resulting in a small locking displacement. On the other hand, when the contact force is excessive, such a state does not occur. Therefore, when the partial waveform in the contact stroke of the motor's time-series torque waveform data does not satisfy the predetermined excessive torque condition and the locking displacement detected by the lock sensor satisfies the predetermined insufficient displacement condition, it is possible to determine that the contact force of the tongue rail is insufficient.

[0014] The fifth invention is A status monitoring device for a point machine that performs switching operation by the driving force of a motor, a deviation amount insufficient determination means (for example, the deviation amount insufficient determination unit 204 in FIG. 5) that determines whether or not a detection result of a lock sensor that detects a lock deviation amount provided on the point machine satisfies a predetermined deviation amount insufficient condition; an inadequate contact force determining means (for example, the inadequate contact force determining unit 210 in FIG. 5) for determining that the contact force of the tongue rail to the base rail is inadequate based on the determination result of the deviation inadequate amount determining means; The condition monitoring device is provided with:

[0015] According to the fifth invention, it is possible to detect inadequate contact force of the tongue rail to the base rail without requiring a dedicated sensor or the like. In other words, the locking deviation detected by the lock sensor corresponds to the positional deviation of the notch of the locking pin relative to the lock piece. If the contact force is insufficient, the tongue rail cannot be displaced to its normal position, and the locking pin, which displaces with the displacement of the tongue rail, also cannot be displaced to its normal position, resulting in a small locking deviation. The locking deviation is detected by an existing lock sensor. Therefore, it is possible to detect insufficient contact force of the tongue rail using the detection result of a sensor provided for a different purpose, such as a lock sensor.

[0016] The sixth invention is the above-mentioned invention, the excessive torque determination means makes a determination for each switching direction of the point machine, the deviation amount insufficient determination means makes a determination for each switching direction of the point machine, external output means (for example, the external output unit 212 in FIG. 5 ) that outputs the determination result by the contact force improperity determination means together with the switching direction of the point; The condition monitoring device further comprises:

[0017] According to the sixth aspect of the present invention, even for the same point machine, if the switching direction is different, the way in which the partial waveform in the time-series torque waveform data of the motor changes during the contact stroke and the amount of lock deviation detected by the lock sensor may differ. Therefore, by making a judgment according to the switching direction, it is possible to improve the judgment accuracy. [Brief explanation of the drawings]

[0018] [Figure 1] Overview of the overall condition monitoring system. [Figure 2] An example of time-series torque waveform data. [Figure 3] An example of time-series torque waveform data when the adhesion force is excessive. [Figure 4] 10 is an example of a decision table. [Figure 5]1 shows an example of the functional configuration of a condition monitoring device. [Figure 6] An example of point machine management data. DETAILED DESCRIPTION OF THE INVENTION

[0019] Hereinafter, preferred embodiments of the present invention will be described with reference to the drawings. Note that the forms to which the present invention can be applied are not limited to the following embodiments. In addition, in the description of the drawings, the same elements are given the same reference numerals.

[0020] 1 is a diagram showing an overview of an entire system for monitoring the status of a point machine including a status monitoring device according to this embodiment. The status monitoring device 1 monitors the status of a point machine 10 that performs switching operations using the driving force of a motor 12. The status monitoring device 1 is installed, for example, in an equipment room or a central control room within a station, and is communicably connected via a wireless or wired communication network N to measurement terminals 30 provided in association with each of the multiple points 10. Then, based on measurement data measured by the measurement terminals 30, an abnormality related to the switching operation of the corresponding point machine 10 is determined.

[0021] The point machine 10 is an electric point machine that performs a series of switching operations using the driving force of a motor 12 and is equipped with a switching gear set and a switching mechanism. The switching gear set converts the rotational output of the motor 12, transmitted via a clutch, into a torque appropriate for driving the switching mechanism. The switching mechanism converts the rotational force transmitted via the switching gear set into linear motion, causing the operating rod to move linearly, thereby switching the tongue rail. As a result, the point is switched between the normal position and the reverse position, and the tongue rail comes into close contact with the base rail. A locking rod is connected to the tongue rail. Therefore, when the operating rod is displaced by the switching operation, the locking rod is displaced along with the displaced operating rod, and at the end of the switching operation, the lock piece is inserted into the notch of the locking rod, thereby locking it. The lock piece operates in a disengagement operation and an insertion operation relative to the notch of the locking rod. A cam mechanism in the switching mechanism performs the disengagement operation at the start of the switching operation and the insertion operation at the end of the switching operation. Locking is completed by inserting the lock piece into the notch of the locking rod, which is an insertion operation. Note that notches and lock pieces are provided for each direction of the turnout (normal / reverse), and locking is achieved by combining the notch and lock piece that corresponds to the direction of turn.

[0022] The measurement terminal 30 is built into the housing of the corresponding point 10 or is installed near the point 10. It associates measurement data from sensors attached to the point 10 with the measurement date and time, and transmits the data to the condition monitoring device 1 as needed, along with the point ID of the point 10. The sensors attached to the point 10 include a voltage / current sensor 14 that measures the voltage and current of the motor 12, and a lock sensor 16 that measures the lock displacement, which is the relative positional deviation between the locking bar notch and the lock piece. In other words, for each switching operation of the point 10, the measurement terminal 30 records the motor voltage and motor current during the switching operation, the lock displacement after the switching operation, and the switching direction as measurement data for that switching operation. The switching direction can be determined, for example, from control information for the point 10 or the operation of a display relay.

[0023] The condition monitoring device 1 judges whether the contact force of the tongue rail with respect to the base rail is excessive or insufficient as an abnormality related to the switching operation of the corresponding point 10, based on the measurement data received and acquired from the measurement terminal 30. In addition, this judgment is made separately for the switching direction (normal position / reverse position) of the point 10.

[0024] Specifically, it is determined whether a partial waveform during the contact stroke in time-series torque waveform data, which is time-series data of motor torque during one switching operation, satisfies a predetermined excessive torque condition. The motor torque can be calculated inferentially from the motor current and motor voltage. It is also determined whether the lock deviation amount, which is the detection result of the lock sensor 16, satisfies a predetermined insufficient deviation amount condition. Then, based on a combination of these determination results (whether the excessive torque condition is satisfied or not, and whether the insufficient deviation amount condition is satisfied or not), an abnormality in the point 10, such as inadequate contact force, is determined.

[0025] Fig. 2 is an example of time-series data (time-series torque waveform data) of the motor torque in one switching operation of the point 10. Fig. 2 shows a schematic waveform of the motor torque, with the horizontal axis representing time and the vertical axis representing the motor torque value.

[0026] The contact stroke in the switching operation of the point 10 is the period from the stroke end point Se, where it is estimated that the stroke operation of driving the operating rod by the driving force of the motor 12 to move the tongue rail so that it comes into contact with the base rail, is completed, until the end of switching, when the operating rod comes to a stop and the motor 12 stops operating, after the tip of the tongue rail is brought into contact with the base rail and locked.

[0027] The stroke end point Se, which is the start point of the contact stroke, is determined, for example, as follows: Because motor torque changes in the same way as motor current, the point at which the motor current starts to decrease (the point at which the time change in the decrease in motor current becomes greater than a predetermined value) is found by going back from the conversion end point, and the start point of the contact stroke (stroke end point Se) is estimated to be a point that is further back a predetermined time (a time determined depending on the point 10, for example, several seconds). Note that even after the motor current starts to decrease, motor torque continues to be generated for a short time, although it decreases. Furthermore, the rotation of the conversion gear group also continues for a short time due to the influence of inertia, etc.

[0028] Figure 2 shows an example of the waveform of the motor torque when the point machine 10 performs a normal switching operation. In the case of an abnormal switching operation in which the adhesion force pressing the tongue rail against the main rail is large, the waveform shows a large increase in the motor torque during the contact stroke due to factors such as an increase in the contact resistance between the tongue rail and the sleeper caused by oil shortage, as shown in the bottom part of Figure 3. The top part of Figure 3 shows an example of the motor torque waveform during normal operation, the same as Figure 2.

[0029] The partial waveform during the contact stroke when the point 10 normally performs a switching operation is the reference waveform. The partial waveform during the contact stroke associated with the most recent switching operation is the waveform under test. By comparing the waveform under test with the reference waveform, it is determined whether the excessive torque condition, which indicates a significant increase relative to the reference waveform, is met. For example, the excessive torque condition can be determined by determining whether the time integral obtained by subtracting the torque value of the reference waveform from the torque value of the waveform under test satisfies a predetermined excessive torque condition; determining whether the excessive torque condition is met by determining whether the total time during which the torque value of the waveform under test exceeds the torque value of the reference waveform satisfies a predetermined excessive torque condition; or determining whether the maximum torque value of the waveform under test exceeds the maximum torque value of the reference waveform by such an amount as to satisfy a predetermined excessive threshold condition.

[0030] Furthermore, whether or not the lock deviation amount, which is the detection result of the lock sensor 16, satisfies a predetermined deviation insufficient condition is determined as follows: The lock deviation amount is the relative positional deviation between the lock piece and the notch in the locking rod of the point 10. For example, if the value when the lock piece is positioned in the center of the notch in the locking rod is taken as the reference value, the lock deviation amount when the point 10 performs a normal switching operation will be within a predetermined normal range close to this reference value.

[0031] The tongue rail is shifted by the operating rod, and a locking rod is connected to the tongue rail. Therefore, when the tongue rail is displaced, the locking rod is displaced, and when the tongue rail stops displacing, the locking rod stops displacing. At the end of a series of shifting operations, the lock piece is inserted into the notch of the locking rod whose displacement has stopped (or almost stopped). The state in which the displacement of the locking rod relative to the lock piece is neither too small nor too large is the state in which the lock displacement is within the normal range.

[0032] The locking displacement can be considered as the relative positional deviation of the locking bar notch with respect to the lock piece. Therefore, the locking displacement indirectly indicates the stroke value, which is the displacement of the tongue rail to which the locking bar is connected, i.e., the displacement of the operating bar during the switching operation.

[0033] If the contact force pressing the tongue rail against the base rail during switching operation is too small, causing the tongue rail to be unable to move to its normal position and creating a certain gap between the tongue rail and the base rail, the displacement of the locking lever will be small due to the small displacement of the tongue rail, and the locking displacement will be less than the reference value. On the other hand, if the contact force during switching operation is too large, the tongue rail will move to its normal position and be in close contact with the base rail, just like when the point 10 performs switching operation normally. Therefore, the locking displacement will be within the normal range close to the reference value.

[0034] For this reason, the lock deviation amount when the point 10 performs a normal switching operation is set as a reference amount. Then, the measured lock deviation amount is compared with this reference amount to determine whether it satisfies the insufficient deviation amount condition. For example, the range of lock deviation amount corresponding to the range of the gap between the base rail and the tongue rail for which the adhesion force is judged to be appropriate is set as the reference range. In other words, it is a range with some margin of error on the reference amount. Then, the insufficient deviation amount condition is determined when the measured lock deviation amount falls short of this reference range. Note that if the lock deviation amount is outside the reference range and satisfies a predetermined abnormal condition indicating an abnormal value, it is determined to be a so-called lock deviation abnormality.

[0035] Then, an abnormality in the point 10 is determined based on the result of determining whether the motor torque satisfies the excessive torque condition and the result of determining whether the lock deviation amount satisfies the insufficient deviation amount condition.

[0036] Fig. 4 is an example of a judgment table for judging an abnormality of the point 10. As shown in Fig. 4, when the motor torque (partial waveform) during the contact stroke satisfies the excessive torque condition (positive judgment) and the lock deviation amount does not satisfy the insufficient deviation amount condition (negative judgment), it is judged that the contact force is excessive and inadequate as an abnormality of the point 10 (case a in Fig. 4).

[0037] Furthermore, if the motor torque (partial waveform) during the contact stroke does not satisfy the excessive torque condition (negative judgment) and the lock deviation amount satisfies the insufficient deviation amount condition (positive judgment), the contact force is judged to be inadequate, meaning that the contact force is too small, and this is deemed to be an abnormality of the point machine 10 (case b in Figure 4).

[0038] If the motor torque (partial waveform) during the close contact stroke does not satisfy the excessive torque condition (negative judgment) and the lock deviation amount does not satisfy the insufficient deviation amount condition (negative judgment), it is judged that there is no abnormality in the point 10 (normal) (case c in Figure 4).

[0039] If the motor torque (partial waveform) during the contact stroke satisfies the excessive torque condition (positive determination) and the lock deviation amount satisfies the insufficient deviation amount condition (positive determination), it is determined that some switching abnormality has occurred in the point machine 10 (case d in Figure 4).

[0040] Fig. 5 is a block diagram showing an example of the functional configuration of the status monitoring device 1. According to Fig. 5, the status monitoring device 1 includes an operation unit 102, a display unit 104, an audio output unit 106, a communication unit 108, a processing unit 200, and a storage unit 300, and can be configured as a type of computer system.

[0041] The operation unit 102 is realized by an input device such as a button switch, a touch panel, or a keyboard, and outputs an operation signal corresponding to the operation performed to the processing unit 200. The display unit 104 is realized by a display device such as an LCD (Liquid Crystal Display) or a touch panel, and displays various information corresponding to a display signal from the processing unit 200. The audio output unit 106 is realized by an audio output device such as a speaker, and outputs various audio information corresponding to an audio signal from the processing unit 200. The communication unit 108 is realized by a wired or wireless communication device, and communicates with an external device such as the measurement terminal 30 via a given communication network N.

[0042] The processing unit 200 is realized by an arithmetic device such as a CPU (Central Processing Unit), and issues instructions and transfers data to each component constituting the condition monitoring device 1 based on programs, data, etc. stored in the storage unit 300, thereby performing overall control of the condition monitoring device 1. Furthermore, by executing a condition monitoring program 302 stored in the storage unit 300, the processing unit 200 functions as each of the functional blocks of an excessive torque determination unit 202, an insufficient deviation amount determination unit 204, an inadequate contact force determination unit 210, and an external output unit 212. However, these functional blocks can also be configured as independent arithmetic circuits using an ASIC (Application Specific Integrated Circuit), an FPGA (Field Programmable Gate Array), etc.

[0043] The excessive torque determination unit 202 determines whether or not a partial waveform in the contact stroke of the time-series torque waveform data of the motor 12 satisfies a predetermined excessive torque condition. In addition, this determination is made for each switching direction of the point 10.

[0044] Specifically, a partial waveform in the contact stroke of the time-series data (time-series torque waveform data) of the motor torque during the switching operation of the point 10 is used as the waveform to be inspected, and it is determined whether this waveform to be inspected satisfies the excessive torque condition, which indicates a significant increase compared to the reference waveform. For example, the excessive torque condition can be determined by determining whether the time-integrated value of the difference between the torque value of the waveform to be inspected and the torque value of the reference waveform satisfies a predetermined excessive torque condition; determining whether the total time during which the torque value of the waveform to be inspected exceeds the torque value of the reference waveform satisfies a predetermined excessive torque condition; or determining whether the maximum torque value of the waveform to be inspected exceeds the maximum torque value of the reference waveform by a value that satisfies a predetermined excessive threshold condition. The reference waveform is the waveform of the motor torque during the contact stroke when the point 10 normally performs switching operation (see FIG. 3 ). This reference waveform is predetermined for each switching direction and is included in the determination reference data 316 of the corresponding point management data 310.

[0045] The deviation amount insufficient determination unit 204 determines whether or not the detection result of the lock sensor 16 that detects the lock deviation amount provided on the point 10 satisfies a predetermined deviation amount insufficient condition. In addition, this determination is made for each switching direction of the point 10.

[0046] Specifically, the appropriate range of the lock deviation amount when the point 10 performs a normal switching operation is set as a reference range, and the measured lock deviation amount is compared with this reference range to determine whether the deviation amount insufficient condition is met. For example, the deviation amount insufficient condition is determined when the lock deviation amount does not satisfy the reference range. The reference range is predetermined for each switching direction and is included in the determination reference data 316 of the corresponding point management data 310.

[0047] The contact force inadequacy determination unit 210 determines that the contact force of the tongue rail to the main rail is excessive based on the determination result of the excessive torque determination unit 202. When the excessive torque determination unit 202 makes a positive determination and the deviation amount inadequate determination unit 204 makes a negative determination, the contact force of the tongue rail to the main rail may be determined to be excessive. Also, based on the determination result of the deviation amount inadequate determination unit 204, the contact force of the tongue rail to the main rail may be determined to be insufficient. When the excessive torque determination unit 202 makes a negative determination and the deviation amount inadequate determination unit 204 makes a positive determination, the contact force of the tongue rail to the main rail may be determined to be insufficient.

[0048] Specifically, as shown in the judgment table of Fig. 4, if the motor torque (partial waveform) during the contact stroke satisfies the excessive torque condition (positive judgment) and the lock deviation amount does not satisfy the insufficient deviation amount condition (negative judgment), the contact force is judged to be excessive and inadequate as an abnormality of the point 10 (case a in Fig. 4). On the other hand, if the motor torque (partial waveform) during the contact stroke does not satisfy the excessive torque condition (negative judgment) and the lock deviation amount satisfies the insufficient deviation amount condition (positive judgment), the contact force is judged to be inadequate and inadequate as an abnormality of the point 10 (case b in Fig. 4). The judgment result by the contact force inadequate judgment unit 210 is stored as part of the judgment result data 318 of the corresponding point management data 310.

[0049] The external output unit 212 outputs the result of the determination by the contact force improper determination unit 210 together with the switching direction of the point 10 to the outside.

[0050] Specifically, the result of the judgment by the adhesion force inadequacy judgment unit 210 as to whether the adhesion force of the base rail to the tongue rail is inadequate (too large / too small) is output to the outside of the device, together with the direction of change, the point ID of the corresponding point 10, etc., by displaying it on the display unit 104 or outputting it as an audio from the audio output unit 106.

[0051] The storage unit 300 is realized by a storage device such as a hard disk, a ROM (Read Only Memory), or a RAM (Random Access Memory), and stores programs, data, etc. that the processing unit 200 uses to comprehensively control the condition monitoring device 1, and is also used as a working area for the processing unit 200 to temporarily store results of calculations executed by the processing unit 200 in accordance with various programs, and input data via the operation unit 102 and the communication unit 108, etc. In this embodiment, the storage unit 300 stores a condition monitoring program 302 for monitoring the condition of the point 10 that performs a switching operation using the driving force of the motor 12, and point management data 310.

[0052] FIG. 6 is a diagram showing an example of point management data 310. As shown in FIG. 6, the point management data 310 is generated for each point 10 to be monitored, and stores, in association with the point ID 312 of the point 10, switching operation data 314, which is data related to one switching operation, judgment reference data 316, and judgment result data 318. The switching operation data 314 is data based on measurement data received or acquired from the corresponding measurement terminal 30, and includes the measurement date and time, motor voltage data, motor current data, motor torque data, lock deviation amount, and switching direction, which is either normal or reversed. The judgment reference data 316 includes, for each switching direction, a reference waveform of motor torque for determining whether the excessive torque condition is met, and a reference range of lock deviation amount for determining whether the insufficient deviation condition is met. The determination result data 318 is data of the result of the determination made by the contact force inadequacy determination unit 210 based on the switching operation data 314 as to whether or not the point 10 is abnormal.

[0053] According to this embodiment, it is possible to detect inadequate adhesion of the tongue rail to the main rail without requiring a dedicated sensor or the like. That is, the motor torque in the adhesion process of bringing the tongue rail into contact with the main rail during the switching operation of the point 10 is changed to increase significantly due to the repulsive force if the adhesion force is excessive. The torque of the motor 12 is estimated from the motor voltage and motor current measured by the existing voltage-current sensor 14. Therefore, it is not necessary to provide a dedicated sensor to detect inadequate adhesion of the tongue rail. It is possible to detect excessive adhesion of the tongue rail by using the measurement results of sensors provided for different purposes, such as the current sensor and voltage sensor of the motor 12.

[0054] It should be noted that the applicable embodiments of the present invention are not limited to the above-described embodiments, and can be modified as appropriate without departing from the spirit of the present invention. [Explanation of symbols]

[0055] 1...Condition monitoring device 200...Processing section 202...Excessive torque determination unit 204…Difference amount / insufficient determination unit 210... Adhesion inadequacy judgment section 212...External output section 300...Storage section 302...Condition Monitoring Program 310...Point machine management data 10...Point machine 12...Motor 14...Voltage / current sensor 16...Lock sensor 30...Measuring terminal N: Communication network

Claims

1. A status monitoring device for a point machine that performs switching operation by the driving force of a motor, an excessive torque determination means for determining whether a partial waveform in the contact stroke of the time-series torque waveform data of the motor satisfies a predetermined excessive torque condition; an inadequate contact force determining means for determining that the contact force of the tongue rail to the base rail is excessive based on the determination result of the excessive torque determining means; A condition monitoring device comprising:

2. a deviation amount insufficient determination means for determining whether or not a detection result of a lock sensor provided on the point machine for detecting a lock deviation amount satisfies a predetermined deviation amount insufficient condition; Further provided with The contact force inadequacy determination means determines that the contact force of the tongue rail to the base rail is insufficient based on the determination result of the deviation amount insufficiency determination means. The condition monitoring device according to claim 1 .

3. The contact force inadequacy determination means determines that the contact force of the tongue rail with respect to the base rail is excessive when the torque excessive determination means makes an affirmative determination and the deviation insufficient determination means makes a negative determination. The condition monitoring device according to claim 2 .

4. The contact force inadequacy determination means determines that the contact force of the tongue rail with respect to the base rail is insufficient when the torque excessive determination means makes a negative determination and the deviation insufficient determination means makes a positive determination. The condition monitoring device according to claim 2 or 3.

5. A status monitoring device for a point machine that performs switching operation by the driving force of a motor, a deviation amount insufficient determination means for determining whether or not a detection result of a lock sensor provided on the point machine for detecting a lock deviation amount satisfies a predetermined deviation amount insufficient condition; an inadequate contact force determining means for determining that the contact force of the tongue rail to the base rail is insufficient based on the determination result of the deviation insufficiency determining means; A condition monitoring device comprising:

6. the excessive torque determination means makes a determination for each switching direction of the point machine, the deviation amount insufficient determination means makes a determination for each switching direction of the point machine, an external output means for outputting the result of the determination by the contact force inadequacy determination means together with the switching direction of the point; The condition monitoring device according to claim 2 , further comprising:

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