Electric point machine status monitoring device, electric point machine status monitoring method, and program

Abstract

To monitor a state of an electric switch machine by highly accurately estimating output torque and a conversion load of a clutch rotation shaft even in a state where the clutch is slipping by using a method not requiring noise countermeasures and the like without causing any problems in durability.SOLUTION: An electric switch machine state monitoring device includes a clutch output shaft torque estimation processing unit 41, which acquires a current value and a voltage value of a motor of an electric switch machine and rotation speed of an output shaft of a clutch of the electric switch machine, calculates an estimated maximum torque of the motor and a rotation speed ratio of the motor and the clutch, and calculates an estimated value of the torque of the output shaft of the clutch based on a correlation between the rotation speed ratio of the motor and the clutch and a torque ratio of the motor and the clutch.SELECTED DRAWING: Figure 5

Description

[Technical field]

[0001] The present invention relates to an electric point machine status monitoring device, an electric point machine status monitoring method, and a program. [Background technology]

[0002] In an electric point machine that switches and locks the movable parts of a railway switch, if the switching load acting when driving the switch movable parts such as tongue rails exceeds the switching force of the electric point machine itself, the switch switching operation will stop. In order to detect the signs of this before it causes a disruption to train operations, devices are widely used to monitor the condition of electric point machines.

[0003] Conventionally, there is a technique for detecting the switching load or detecting a sign of an increase in the switching load by measuring the current and voltage of a motor that drives an electric point machine and detecting or estimating a change in motor torque or current accompanying a change in the switching load based on the relationship between the motor current and voltage and the motor torque. This technique includes, for example, a method for calculating an estimated value of the switching load acting on a motor from the motor current, etc. (for example, Patent Document 1 and Patent Document 2).

[0004] Other methods for measuring the switching load include a method using a jaw pin type axial force gauge (e.g., Non-Patent Document 1), a method for observing the static state of the tongue rail before and after tongue rail switching and the dynamic behavior of the tongue rail during tongue rail switching operation based on the magnitude of the force applied to the force transmission element connecting the electric actuator and the tongue rail (e.g., Patent Document 3), and a method for attaching a strain gauge to the outside (e.g., Non-Patent Document 2). These methods are measurement methods that utilize the strain of a member that changes linearly with respect to the switching load, and are measured at a location that is not easily affected by the internal operating state of the electric point machine, such as the operating rod or the switch adjuster connecting the operating rod and the point.

[0005] There is also a technique for measuring the rotation speed and voltage of the output shaft of an electric point machine motor, and substituting the measurement results into an equivalent circuit equation for the torque of an induction motor, or for calculating the torque from the rotation speed by using a look-up table (for example, Patent Document 4).There is also a technique for measuring the rotation torque and number of revolutions of a handle that manually switches an electric point machine, and from these, recording the torque associated with the rotation of the handle (for example, Patent Document 5). [Prior art documents] [Patent documents]

[0006] [Patent Document 1] Patent No. 3020268 [Patent Document 2] Patent No. 4719240 [Patent Document 3] Patent No. 4510589 [Patent Document 4] Patent No. 2774947 [Patent Document 5] Patent No. 2596264 [Non-Patent Document 1] Shunsuke Shiomi, Seven Tools for Research and Development: Jaw Pin Type Axial Force Meter, RRR, Vol. 74, No. 1, 2017 [Non-Patent Document 2] Masataka Sasaki, Masahiko Suzuki, Toshiyuki Kaneda, Fundamental Development of NS Electric Point Machine Monitoring, JR East Summary of the Invention [Problem to be solved by the invention]

[0007] In the method of calculating the estimated value of the switching load as in the above-mentioned techniques described in Patent Document 1 and Patent Document 2, the torque acting on the motor of the electric point machine is estimated, and then the torque of the cam mechanism that converts the rotational motion into the linear motion of the operating can is multiplied by the torque and force transmission rate (a function of the movement amount of the operating can) of the cam mechanism to calculate the estimated value of the switching load. In this case, the estimated value of the switching load is calculated by estimating the time when the operating can starts to move and the time when it stops moving, based on the time from the start to the end of the switching detected using the contact point (which is disconnected when a predetermined switching operation is performed and a locking operation is performed) provided on the lock piece, under the assumption that the operating can moves at a constant speed. Here, in the clutch, which is one of the overload protection means for the motor provided between the motor and the cam mechanism, when there is no difference in rotation speed between the input and output shafts of the clutch and the torque is transmitted 100%, at least the torque of the motor and the torque of the rotating shaft of the switching gear immediately before the cam mechanism can be calculated by the gear ratio of the two. However, in an actual usage environment of an electric point machine, particularly when the switching load of a switch is large, the torque exceeds the torque that the clutch can transmit, and the torque and rotational speed of the motor's rotating shaft do not match the torque and rotational speed of the clutch's output shaft.

[0008] The techniques described in Patent Document 3 and Non-Patent Document 2 above are measurement methods that utilize the strain of a member that changes linearly with respect to the switching load, and as described above, the strain is measured at a location that is not easily affected by the internal operating state of the electric point machine, such as the operating rod and the switch adjuster that connects the operating rod and the turnout. However, since the strain of the member relative to the magnitude of the switching load normally used (for example, 1 to several kN) is small, it is easily affected by the return current flowing through the rail, noise from inverters received from track circuits and vehicles, or drift due to temperature changes, and it is not easy to obtain a practical signal strength. In addition, the jaw pin type axial force meter described in Non-Patent Document 1 above has a structure that can obtain a sufficient signal strength, so a sufficiently practical value can be obtained by a general strain measurement method, but in order to obtain a practical value, the mechanical strength of the strain gauge is reduced. For this reason, although this technology can withstand short-term use such as running tests, there is a problem with long-term durability over several decades.

[0009] Moreover, the technology described in the above-mentioned Patent Document 4 estimates the torque output by the motor, and does not estimate the case where the clutch is slipping. And, the technology described in the above-mentioned Patent Document 5 can calculate the torque on the output side of the clutch by multiplying the measured torque by the gear ratio, but the torque is not necessarily the same as the torque when the motor of the electric point machine is driven, and further, a torque sensor that measures the deformation amount of a rotating shaft with a strain gauge, magnetostriction, or the like generally has a mechanical strength lower than that of the shaft to be measured so that it is more easily deformed in order to increase sensitivity, due to the measurement principle, so that it is not realistic from the viewpoint of durability to incorporate a torque sensor based on the same principle on the rotating shaft of an electric point machine.

[0010] Therefore, an object of the present invention is to solve the above-mentioned problems, that is, to provide an electric point machine condition monitoring device, an electric point machine condition monitoring method, and a program that are capable of estimating the output torque and switching load of the clutch rotating shaft with high accuracy even when the clutch is slipping, using a method that does not cause problems in durability and does not require noise control measures, etc. [Means for solving the problem]

[0011] One aspect of the electric point machine condition monitoring device of the present invention is characterized in that it has a clutch output shaft torque estimation processing unit that acquires the current value and voltage value of the motor of the electric point machine, as well as the rotational speed of the output shaft of the clutch of the electric point machine, calculates the estimated maximum torque of the motor and the rotational speed ratio of the motor and the clutch, and calculates an estimated value of the torque of the output shaft of the clutch based on the correlation between the rotational speed ratio of the motor and the clutch and the torque ratio of the motor and the clutch.

[0012] Another aspect of the electric point machine condition monitoring device of the present invention is characterized in that the clutch output shaft torque estimation processing unit has a motor estimated maximum torque calculation unit that calculates an estimated maximum torque of the motor based on the motor voltage value and the rotational speed of the clutch output shaft.

[0013] Another aspect of the electric point machine condition monitoring device of the present invention is characterized in that the clutch output shaft torque estimation processing unit has a motor rotational speed conversion unit that converts the motor current value and voltage value into the motor rotational speed, and a rotational speed ratio calculation unit that calculates a rotational speed ratio based on the motor rotational speed obtained by the motor rotational speed conversion unit and the rotational speed of the clutch output shaft.

[0014] Another aspect of the electric point machine condition monitoring device of the present invention is characterized in that it further has a switching load estimation processing unit that calculates the switching load of the electric point machine based on the estimated value of the torque of the clutch output shaft calculated by the clutch output shaft torque estimation processing unit, the reduction ratio of the power transmission mechanism, and the power transmission ratio for converting rotational motion to linear motion.

[0015] One aspect of the electric point machine condition monitoring method of the present invention is characterized by including an acquisition step of acquiring a current value and a voltage value of the motor of the electric point machine and a rotational speed of an output shaft of the clutch of the electric point machine; a first calculation step of calculating an estimated maximum torque of the motor based on the motor voltage value and the rotational speed of the output shaft of the clutch acquired by processing in the acquisition step; a second calculation step of calculating a rotational speed ratio of the motor and the clutch based on the motor current value and voltage value and the rotational speed of the output shaft of the clutch acquired by processing in the acquisition step; and a third calculation step of calculating an estimated value of the torque of the output shaft of the clutch based on the estimated maximum torque value of the motor calculated by processing in the first calculation step, the rotational speed ratio calculated by processing in the second calculation step, and a correlation between the rotational speed ratio and the torque ratio of the motor and the clutch.

[0016] One aspect of the program of the present invention includes an acquisition step of acquiring the current value and voltage value of the motor of the electric rolling machine, and the rotational speed of the output shaft of the clutch of the electric rolling machine; a first calculation step of calculating an estimated maximum torque of the motor based on the voltage value of the motor acquired by the processing of the acquisition step and the rotational speed of the output shaft of the clutch; a second calculation step of calculating the rotational speed ratio of the motor and the clutch based on the current value and voltage value of the motor acquired by the processing of the acquisition step and the rotational speed of the output shaft of the clutch; and a third calculation step of calculating an estimated value of the torque of the output shaft of the clutch based on the estimated maximum torque of the motor calculated by the processing of the first calculation step, the rotational speed ratio calculated by the processing of the second calculation step, and the correlation between the rotational speed ratio and the torque ratio of the motor and the clutch.

Advantages of the Invention

[0017] According to the present invention, even when the clutch is slipping, the state of the electric rolling machine can be monitored with high estimation accuracy of torque and conversion load, using a method that does not cause problems in durability and does not require noise countermeasures or the like.

Brief Description of the Drawings

[0018] [Figure 1] It is a diagram for explaining an example of the structure of a power transmission mechanism in an electric rolling machine using a cam mechanism. [Diagram 2] It is an enlarged view of the connection portion between the motor 1 and the clutch 3. [Diagram 3] It is a diagram for explaining the relationship between the torque ratio and the speed ratio. [Figure 4] It is a functional block diagram showing the functions of the electric rolling machine state monitoring system 21. [Diagram 5] It is a functional block diagram showing a more detailed functional configuration of the clutch output shaft torque estimation processing unit 41. [Figure 6] It is a diagram for explaining the estimation result. [Figure 7] It is a diagram for explaining the estimation result. [Figure 8] 4 is a flowchart for explaining the processing of the electric point machine state monitoring system 21. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0019] Hereinafter, an electric point machine state monitoring device, an electric point machine state monitoring method, and a program according to an embodiment of the present invention will be described with reference to the drawings.

[0020] An example of the structure of a power transmission mechanism in an electric point machine using a cam mechanism will be described with reference to Fig. 1. Fig. 1 is a side view of a portion of the electric point machine corresponding to a motor 1, a reduction mechanism 2, and a clutch 3, and a bottom view of a portion of the reduction mechanism 2 shown in the side view, including a switching gear 11, a roller 12, and an operating rod 13.

[0021] The electric point machine is equipped with a speed reduction mechanism 2 that reduces the speed of the rotational motion of the motor 1 and converts it into linear motion using a cam mechanism, ball screw or other mechanism to output linear motion in order to convert the rotational motion of the rotating shaft of the motor 1 into linear motion for translating the movable part of the switch such as a tongue rail. The speed reduction mechanism 2 is composed of a switching gear 11, rollers 12, and an operating rod 13. The arrow a in the figure indicates the rotating shaft torque of the switching gear 11, and the arrow b in the figure indicates the switching load.

[0022] A clutch 3 is provided between the motor 1 and the reduction gear mechanism 2, which acts as a torque limiter to prevent excessive torque or switching force from being output in the event of a stop in the switching operation due to a stone getting in the switch or an overload on the operating rod 13, which is the output part of the converted linear motion. In addition to the parts shown in Fig. 1, the electric point machine is equipped with a mechanism for driving and fitting a member that holds the position of the operating rod 13 after the switching operation is completed and a locking mechanism that uses the fulcrum of the cam mechanism to hold the position of the switch movable part after the switching operation is completed and to hold the position against external forces caused by vehicle travel, etc., but illustrations and detailed explanations of these are omitted.

[0023] 2 is an enlarged view of the connection between the motor 1 and the clutch 3. The clutch 3 transmits the output torque of the motor 1, but in the event of an overload, slippage occurs, preventing overload from being applied to the downstream of the clutch 3. In other words, the output torque of the clutch 3 in a state in which the clutch 3 used for overload protection functions due to the action of an overload, i.e., in a state in which an overload occurs and the clutch is slipping, is a different value from the input torque of the clutch 3, i.e., the output torque of the motor 1.

[0024] As shown in FIG. 2, in the motor 1 and the clutch 3, the rotation speed ω m , the output torque of motor 1 T m , the torque when it is assumed that the entire decrease in rotation speed physically occurs in motor 1, i.e., the estimated maximum torque T mc , the rotation speed ω of clutch 3 c , torque T of clutch 3 c Then, the estimated maximum torque of motor 1 is T mc and torque T of clutch 3 c and the torque ratio of motor 1 and the rotation speed ω m and the rotational speed ω of clutch 3 c In some types of clutches, such as induction clutches, the speed ratio of the torque gen- erated by the torque converter is exponentially proportional to the torque gen-erated by the torque converter, as shown in Figure 3.

[0025] Fig. 4 is a functional block diagram showing functions of an electric point machine status monitoring system 21 that estimates the switching load of the electric point machine described using Fig. 1 to Fig. 3. The electric point machine status monitoring system 21 can estimate the switching load for an electric point machine that can indicate a torque ratio and a rotational speed ratio between the motor 1 and the clutch 3 in a certain relationship.

[0026] The electric point machine status monitoring system 21 includes the functions of a current value measurement unit 31, a voltage value measurement unit 32, a clutch rotation speed measurement unit 33, an electric point machine operation monitoring unit 34, a data processing unit 35, and an output processing unit 36. The data processing unit 35 includes the functions of a clutch output shaft torque estimation processing unit 41, a gear etc. shaft torque estimation processing unit 42, and a switching load estimation processing unit 43. The electric point machine status monitoring system 21 may be configured by a plurality of devices, and for example, an electric point machine status monitoring device including the functions of the data processing unit 35 and the output processing unit 36 ​​may be configured, and the functions of the current value measurement unit 31, the voltage value measurement unit 32, the clutch rotation speed measurement unit 33, and the electric point machine operation monitoring unit 34 may be configured as different devices.

[0027] The current value measuring unit 31 measures the current of the motor 1 and outputs the measured current value I m to the data processing unit 35. The current value measuring unit 31 may be, for example, a current sensor.

[0028] The voltage value measurement unit 32 measures the voltage of the motor 1 and outputs the measured voltage value V m to the data processing unit 35. The voltage value measurement unit 32 may include, for example, a voltage sensor and an A / D converter.

[0029] It is preferable that the current value measuring unit 31 and the voltage value measuring unit 32 are provided inside the electric point machine, but they may be provided outside the electric point machine.

[0030] The clutch rotation speed measurement unit 33 measures the rotation speed of the output shaft of the clutch 3 and converts the measured rotation speed ω c The value of is supplied to the data processing unit 35. The clutch rotation speed measurement unit 33 is configured to include, for example, a magnetic sensor that counts the number of teeth of a gear.

[0031] The clutch rotation speed measurement unit 33 measures the rotation speed ω cFor example, the rotation angle or rotation angular velocity of the clutch 3 may be measured and the rotation speed ω c Alternatively, the rotation of the rotating shafts and the gears that transmit the rotations, which have different rotation speeds, in the reduction mechanism 2 are measured, and the rotation speed ω is calculated by multiplying the reduction ratio. c The rotational speed ω is calculated by calculating the displacement and speed of the linear motion after the rotational motion of the clutch 3 is converted into linear motion in the reduction mechanism 2 and converting the displacement and speed into a rotation angle and a rotational speed. c That is, the clutch rotation speed measurement unit 33 may be provided on the output shaft of the clutch 3, or may be provided inside the speed reduction mechanism 2. A sensor for measuring the rotation speed can be easily installed without affecting the function of the clutch 3, and no problems arise in terms of durability, etc.

[0032] The electric point machine operation monitoring unit 34 monitors the operation of the electric point machine and notifies the data processing unit 35 of the start and end of the operation of the electric point machine. The electric point machine operation monitoring unit 34 may be provided as an independent function, but may also be configured to monitor the operation by performing calculations within the data processing unit 35 based on, for example, the current value measured by the current value measuring unit 31 or the rotation speed measured by the clutch rotation speed measuring unit 33.

[0033] The data processing unit 35, based on a notification from the electric point machine operation monitoring unit 34, detects the current value I of the motor 1 measured by the current value measuring unit 31 during the operation of the electric point machine. m , the voltage value V of the motor 1 measured by the voltage value measurement unit 32 m , and the rotation speed ω of the output shaft of the clutch 3 measured by the clutch rotation speed measurement unit 33 mand executes processing to estimate the torque of the output shaft of the clutch 3, the torque of the shafts of the rotating mechanism such as the gears in the speed reduction mechanism 2, and the value of the conversion load in the linear motion after the rotational motion of the clutch 3 is converted into linear motion. Here, the data processing unit 35 will be described as estimating the torque of the shaft of the conversion gear 11 as the torque of the shafts of the rotating mechanism, and estimating the value of the conversion load of the operating can 13 as the value of the conversion load in the linear motion.

[0034] The clutch output shaft torque estimation processing unit 41 of the data processing unit 35 receives the current value I m , the voltage value V of the motor 1 supplied from the voltage value measurement unit 32 m , and the rotation speed ω of the output shaft of the clutch 3 supplied from the clutch rotation speed measurement unit 33 m From the above, the estimated torque T of the output shaft of clutch 3 is c Calculate.

[0035] Here, the rotation speed of motor 1, ω m is the current value I of motor 1 m and the intercept and slope of the linear approximation are the voltage value V of motor 1. m It is clear that the rotation speed of the motor 1 changes depending on m and the torque of motor 1, T m Also, there is a linear approximation relationship, and the intercept and slope of the linear approximation are the voltage value V of motor 1. m This relationship, that is, the coefficient of the approximation, is obtained from the relationship between the current value or torque of the AC induction motor and the slip ratio with the motor 1.

[0036] The clutch output shaft torque estimation processing unit 41 estimates the rotation speed ω of the output shaft of the clutch 3 measured by the clutch rotation speed measurement unit 33. c However, when there is no difference in rotation speed between the input and output shafts of the clutch 3, that is, when the rotation speed of the motor 1 is ω m is the rotation speed of the output shaft of clutch 3, ω m Assuming that the rotational speed of motor 1 is equal to ω mand the torque of motor 1, T m The torque of motor 1 obtained by substituting the linear approximation formula of the above, that is, the estimated maximum torque T of motor 1, which is the upper limit of the estimated range of torque obtained assuming that all the reduction in rotation speed physically occurs in motor 1, is mc In addition, the clutch output shaft torque estimation processing unit 41 calculates the rotation speed ω c and the current value I m The rotation speed ω of motor 1 estimated from m Calculate the rotational speed ratio ν to

[0037] In fact, when the rotation speed drops significantly, slippage occurs in the clutch 3, causing a difference in rotation speed between the output shaft of the motor 1 and the output shaft of the clutch 3. In other words, the relationship between the rotation speed ratio ν and the torque ratio τ explained using Fig. 3 can be said to hold true whether the clutch 3 is in a non-slip state or a slipping state.

[0038] By utilizing this relationship, the clutch output shaft torque estimation processing unit 41 estimates the output shaft torque of the clutch 3 through a state in which the clutch 3 is slipping (ν<1) and a state in which the clutch 3 is not slipping (ν=1). c The clutch output shaft torque estimation processing unit 41 calculates the estimated value T c to the gear output shaft torque estimation processor 42. A more detailed configuration example of the functions of the clutch output shaft torque estimation processor 41 will be described later with reference to FIG.

[0039] The gear equal shaft torque estimation processing unit 42 of the data processing unit 35 estimates the output shaft torque of the clutch 3 from the clutch output shaft torque estimation processing unit 41. c This is multiplied by the reduction ratio of the power transmission mechanism inside the reduction mechanism 2 to calculate an estimate of the torque of the rotating shaft of a specific gear or other rotating mechanism in the downstream stage, in this case the rotating shaft of the conversion gear 11, and supplied to the conversion load estimation processing unit 43.

[0040] The conversion load estimation processing unit 43 of the data processing unit 35 multiplies the estimated value of the torque of the rotating shaft of the conversion gear 11 supplied from the gear parallel axis torque estimation processing unit 42 by the power transmission ratio for converting rotational motion to linear motion to calculate an estimate of the conversion load, which is the force acting on a specific linear motion part, in this case the operating can 13, and supplies the estimate to the output processing unit 36.

[0041] The output processing unit 36 ​​outputs the estimated value of the switching load acting on the operation can 13, supplied from the data processing unit 35, to another predetermined information processing device such as a centralized management device for railway equipment.

[0042] 5 is a functional block diagram showing a more detailed functional configuration example of the clutch output shaft torque estimation processing unit 41. The clutch output shaft torque estimation processing unit 41 is configured to include the functions of a current value acquisition unit 51, a voltage value acquisition unit 52, a clutch rotation speed acquisition unit 53, a motor rotation speed conversion unit 54, a motor estimated maximum torque calculation unit 55, a rotation speed ratio calculation unit 56, and a clutch output shaft torque estimation value calculation unit 57.

[0043] The current value acquisition unit 51 acquires the current value I m and supplies it to the motor rotation speed conversion unit 54.

[0044] The voltage value acquisition unit 52 acquires the voltage value V of the motor 1 supplied from the voltage value measurement unit 32. m and supplies it to the motor rotation speed conversion unit 54 and the estimated maximum motor torque calculation unit 55.

[0045] The clutch rotation speed acquisition unit 53 acquires the rotation speed ω of the output shaft of the clutch 3 supplied from the clutch rotation speed measurement unit 33. c and supplies it to the motor estimated maximum torque calculation unit 55 and the rotation speed ratio calculation unit 56.

[0046] The motor rotation speed conversion unit 54 converts the current value I of the motor 1 supplied from the current value acquisition unit 51 into m and the voltage value V of the motor 1 supplied from the voltage value acquisition unit 52 mSubstituting this into the following equation (1), the rotation speed ω m and supplies the result to the rotational speed ratio calculation unit 56. in and β in The value of is the voltage value V of Motor 1. m It is a coefficient of a linear approximation that varies depending on the temperature and is obtained by actual measurement.

[0047]

number

[0048] The motor estimated maximum torque calculation unit 55 calculates the voltage value V of the motor 1 supplied from the voltage value acquisition unit 52. m and the output shaft rotation speed ω of the clutch 3 supplied from the clutch rotation speed acquisition unit 53. c Substituting this into the following equation (2), the estimated maximum torque T of motor 1 is obtained. mc The value corresponding to the torque of the clutch output shaft is calculated and supplied to the clutch output shaft torque estimation value calculation unit 57. nt and β nt The value of is the voltage value V of Motor 1. m It is a coefficient of a linear approximation that varies depending on the temperature and is obtained by actual measurement.

[0049]

number

[0050] The rotation speed ratio calculation unit 56 calculates the output shaft rotation speed ω of the clutch 3 supplied from the clutch rotation speed acquisition unit 53. c and the rotation speed ω of the motor 1 supplied from the motor rotation speed conversion unit 54 m From the above, the rotational speed ratio ν (ν=ω c / ω m ) and supplies it to the clutch output shaft torque estimate value calculation unit 57.

[0051] The clutch output shaft torque estimation value calculation unit 57 calculates the estimated maximum torque Tmc and the rotational speed ratio ν=ω between the output shaft of the motor 1 and the output shaft of the clutch 3, which is supplied from the rotational speed ratio calculation unit 56. c / ω m Substituting this into the following equation (3), the estimated value T of the torque of the output shaft of clutch 3 is obtained. c The calculated torque is supplied to the gear torque estimation processor 42. Note that the formula (3) is the estimated maximum torque T mc and torque T of clutch 3 c The torque ratio τ and the rotation speed ω of motor 1 m and the rotational speed ω of clutch 3 c This is an equation showing the exponential approximation relationship of the rotational speed ratio ν with γ ot and δ ot The value of is a coefficient obtained by experiment.

[0052]

number

[0053] The clutch output shaft torque estimation value calculation unit 57 estimates the calculated torque of the output shaft of the clutch 3 based on the estimated value T c The gear output shaft torque estimation processor 42 receives the estimated value T c This is multiplied by the reduction ratio of the power transmission mechanism inside the reduction mechanism 2 to calculate an estimate of the torque of the rotating shaft of the conversion gear 11, and the conversion load estimation processing unit 43 multiplies the estimated value of the torque of the rotating shaft of the conversion gear 11 supplied from the gear shaft torque estimation processing unit 42 by the power transmission ratio that converts rotational motion to linear motion to calculate an estimate of the conversion load, which is the force acting on the operating can 13, and supplies this to the output processing unit 36.

[0054] 6 is a diagram showing the actual measurement value and the estimated value obtained by the electric point machine status monitoring system 21 in the relationship between the stroke of the operating can 13 and the switching load when a high switching load is applied and the clutch 3 is slipping. By having the above-mentioned functions, the electric point machine status monitoring system 21 can obtain an estimated value of the switching load close to the actual measurement value even when a high switching load is applied and the clutch 3 is slipping.

[0055] 7 is a diagram showing the actual measured values ​​and the estimated values ​​obtained by the electric point machine status monitoring system 21 in the relationship between the stroke of the operating rod 13 and the torque of the rotating shaft of the operating rod 13 when switching failure occurs due to the action of a high switching load. By having the above-mentioned functions, the electric point machine status monitoring system 21 can obtain estimated values ​​close to the actual measured values ​​even when switching failure occurs due to the action of a high switching load.

[0056] Incidentally, the electric point machine status monitoring system 21 is capable of obtaining an estimated value close to an actually measured value even when the clutch 3 is not slipping.

[0057] In this way, the electric point machine status monitoring system 21 can obtain more accurate estimates than conventional methods, especially when a high switching load is applied. Also, since the electric point machine status monitoring system 21 does not require a sensor for measuring torque, even when a conventional electric point machine is used, it is not necessary to take measures against noise in the measurement system to ensure the S / N ratio or to adopt a structure with reduced strength to ensure the S / N ratio.

[0058] Next, the processing executed by the data processing unit 35 of the electric point machine status monitoring system 21 will be described with reference to the flowchart of Fig. 8. In the flowchart of Fig. 8, the processing of steps S2 to S8 is executed as needed while the status of the electric point machine is being monitored. That is, the processing of step S2 is not executed when step S8 ends and the monitoring state continues, but rather, while the monitoring state continues, the processing of step S2 and subsequent steps are executed sequentially at a predetermined timing rate.

[0059] In step S1, the electric point operation monitoring unit 34 determines whether or not the operation of the electric point has started. If it is determined in step S1 that the operation of the electric point has started, the process proceeds to step S2.

[0060] In step S2, the current value acquisition unit 51 acquires the current value I m and supplies it to the motor rotation speed conversion unit 54. The voltage value acquisition unit 52 also acquires the voltage value V m and supplies it to a motor rotation speed conversion unit 54 and an estimated maximum motor torque calculation unit 55. The clutch rotation speed acquisition unit 53 also acquires the rotation speed ω c and supplies it to the motor estimated maximum torque calculation unit 55 and the rotation speed ratio calculation unit 56.

[0061] In step S3, the motor rotation speed conversion unit 54 converts the current value I m and the voltage value V of the motor 1 supplied from the voltage value acquisition unit 52 m Substituting this into the above equation (1), the rotation speed ω m and supplies the converted value to the rotational speed ratio calculation unit 56.

[0062] In step S4, the motor estimated maximum torque calculation unit 55 calculates the voltage value V mand the output shaft rotation speed ω of the clutch 3 supplied from the clutch rotation speed acquisition unit 53. c Substituting this into the above equation (2), the estimated maximum torque T mc and supplies the calculated value to the clutch output shaft torque estimation value calculation unit 57.

[0063] In step S5, the rotation speed ratio calculation unit 56 calculates the output shaft rotation speed ω c and the rotation speed ω of the motor 1 supplied from the motor rotation speed conversion unit 54 m From the above, the rotational speed ratio ν (ν=ω c / ω m ) and supplies it to the clutch output shaft torque estimate value calculation unit 57.

[0064] In step S6, the clutch output shaft torque estimation value calculation unit 57 calculates the estimated maximum torque T mc The rotation speed ratio ν between the output shaft of the motor 1 and the output shaft of the clutch 3, which is supplied from the rotation speed ratio calculation unit 56, is substituted into the above-mentioned equation (3) to obtain an estimated value T c and supplies it to the gear equal axis torque estimation processing unit 42.

[0065] In step S7, the gear output shaft torque estimation processing unit 42 estimates the output shaft torque of the clutch 3 based on the estimated value T c This is multiplied by the reduction ratio of the power transmission mechanism inside the reduction gear 2 to calculate an estimate of the torque of a specific rotating shaft, in this case the rotating shaft of the conversion gear 11 , and supplied to the conversion load estimation processing unit 43 .

[0066] In step S8, the switching load estimation processing unit 43 multiplies the estimated value of the torque of the rotating shaft of the switching gear 11 supplied from the gear parallel shaft torque estimation processing unit 42 by the power transmission ratio for converting rotational motion to linear motion to calculate an estimated value of the switching load, which is the force acting on a certain linear motion part, in this case the operating can 13, and supplies this to the output processing unit 36. The output processing unit 36 ​​outputs the estimated value of the switching load acting on the operating can 13 supplied from the data processing unit 35 to another predetermined information processing device such as a centralized management device for railway equipment.

[0067] In step S9, the electric point machine operation monitoring unit 34 judges whether or not the operation of the electric point machine has been completed. If it is judged in step S9 that the operation of the electric point machine has not been completed, the processing of steps S2 to S8 is repeated. If it is judged in step S9 that the operation of the electric point machine has been completed, the processing is terminated.

[0068] As described above, the processing executed by the data processing unit 35 of the electric point machine status monitoring system 21 is not only executed at any time during operation of the electric point machine, but also, for example, during operation of the electric point machine, only the processing of steps S1, S2, and S9 may be executed, and the measurement values ​​of the current value acquisition unit 51, the voltage value acquisition unit 52, and the clutch rotational speed acquisition unit 53 obtained by the processing of step S2 may be stored in a memory unit (not shown), and after the operation of the electric point machine is completed, that is, when it is determined in step S9 that the operation of the electric point machine has been completed, the measurement values ​​stored in the memory unit (not shown) may be read out by the motor rotational speed conversion unit 54, the motor estimated maximum torque calculation unit 55, and the rotational speed ratio calculation unit 56, and the processing of steps S3 to S8 may be executed collectively in a batch.

[0069] In this way, the electric point machine status monitoring system 21 that estimates the switching load of the electric point machine includes an electric point machine status monitoring device that includes the function of the data processing unit 35, and the data processing unit 35 is configured to calculate the current value I m and the voltage value V m , and the rotation speed ω of the output shaft of the clutch 3c and calculate the estimated maximum torque T of motor 1. mc , and the rotational speed ratio ν of the motor 1 and the clutch 3 is calculated, and an estimated value T of the torque of the output shaft of the clutch 3 is calculated based on the correlation between the rotational speed ratio ν of the motor 1 and the clutch 3 and the torque ratio τ of the motor 1 and the clutch 3. c Since the clutch output shaft torque estimation processing unit 41 calculates the torque, the condition of the electric point machine can be monitored with high estimation accuracy of the torque and switching load even when the clutch 3 is slipping, using a method that does not cause problems in durability and does not require noise countermeasures or the like.

[0070] The above-described technology can be applied to hardware such as a personal computer.

[0071] The above-mentioned series of processes can be executed by hardware or software. When the series of processes are executed by software, the programs constituting the software are installed from a program recording medium into a computer incorporated in dedicated hardware, or into, for example, a general-purpose personal computer capable of executing various functions by installing various programs.

[0072] In addition, the program executed by the computer may be a program in which processing is performed chronologically in the order described in this specification, or it may be a program in which processing is performed in parallel or at the required timing, such as when called.

[0073] Furthermore, the present invention is not limited to the above-described embodiment, and various modifications are possible without departing from the spirit and scope of the present invention. [Explanation of symbols]

[0074] 1...motor; 2...reduction mechanism; 3...clutch; 11...switching gear; 12...roller; 13...operation bar, 21...electric switch machine status monitoring system, 31...current value measuring unit, 32...Voltage value measurement unit, 33...Clutch rotational speed measurement unit, 34...Electric point machine operation monitoring unit, 35...Data processing unit, 36...Output processing unit, 41...Clutch output shaft torque estimation processing unit, 42...Gear etc. shaft torque estimation processing unit, 43...Switching load estimation processing unit, 51...Current value acquisition unit, 52...Voltage value acquisition unit, 53...Clutch rotational speed acquisition unit, 54...Motor rotational speed conversion unit, 55...Motor estimated maximum torque calculation unit, 56...Rotational speed ratio calculation unit, 57...Clutch output shaft torque estimation value calculation unit

Claims

1. An electric point machine status monitoring device that estimates a switching load of an electric point machine, a clutch output shaft torque estimation processing unit that acquires a current value and a voltage value of the motor of the electric point machine and a rotational speed of an output shaft of a clutch of the electric point machine, calculates an estimated maximum torque of the motor and a rotational speed ratio of the motor and the clutch, and calculates an estimated value of the torque of the output shaft of the clutch based on a correlation between the rotational speed ratio of the motor and the clutch and the torque ratio of the motor and the clutch. An electric point machine status monitoring device comprising:

2. The electric point machine status monitoring device according to claim 1, The clutch output shaft torque estimation processing unit has a motor estimated maximum torque calculation unit that calculates an estimated maximum torque of the motor based on the voltage value of the motor and the rotation speed of the output shaft of the clutch. An electric point machine condition monitoring device characterized by the above.

3. The electric point machine status monitoring device according to claim 1 or 2, The clutch output shaft torque estimation processing unit is a motor rotation speed conversion unit that converts the current value and the voltage value of the motor into a rotation speed of the motor; a rotational speed ratio calculation unit that calculates the rotational speed ratio based on the rotational speed of the motor obtained by the motor rotational speed conversion unit and the rotational speed of an output shaft of the clutch; An electric point machine status monitoring device comprising:

4. The electric point machine status monitoring device according to claim 1 or 2, a switching load estimation processing unit that calculates the switching load of the electric point machine based on an estimated value of the torque of the output shaft of the clutch calculated by the clutch output shaft torque estimation processing unit, a reduction ratio of a power transmission mechanism, and a power transmission ratio that converts rotational motion into linear motion. The electric point machine status monitoring device further comprises:

5. An electric point machine status monitoring method for an electric point machine status monitoring device that estimates a switching load of an electric point machine, comprising: an acquisition step of acquiring a current value and a voltage value of a motor of the electric point machine and a rotation speed of an output shaft of a clutch of the electric point machine; a first calculation step of calculating an estimated maximum torque of the motor based on the voltage value of the motor acquired by the processing of the acquisition step and a rotation speed of an output shaft of the clutch; a second calculation step of calculating a rotational speed ratio between the motor and the clutch based on the current value and the voltage value of the motor acquired by the processing of the acquisition step, and a rotational speed of an output shaft of the clutch; a third calculation step of calculating an estimated value of a torque of an output shaft of the clutch based on the estimated maximum torque value of the motor calculated by the processing of the first calculation step, the rotational speed ratio calculated by the processing of the second calculation step, and a correlation between the rotational speed ratio and a torque ratio of the motor and the clutch; An electric point machine condition monitoring method comprising:

6. A program executed by a computer for monitoring the state of an electric point machine, an acquisition step of acquiring a current value and a voltage value of a motor of the electric point machine and a rotation speed of an output shaft of a clutch of the electric point machine; a first calculation step of calculating an estimated maximum torque of the motor based on the voltage value of the motor acquired by the processing of the acquisition step and a rotation speed of an output shaft of the clutch; a second calculation step of calculating a rotational speed ratio between the motor and the clutch based on the current value and the voltage value of the motor acquired by the processing of the acquisition step, and a rotational speed of an output shaft of the clutch; a third calculation step of calculating an estimated value of a torque of an output shaft of the clutch based on the estimated maximum torque of the motor calculated by the processing of the first calculation step, the rotational speed ratio calculated by the processing of the second calculation step, and a correlation between the rotational speed ratio and a torque ratio of the motor and the clutch; A program comprising:

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