JP2010137686A - State monitoring device of switch - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a state monitoring device of a switch measuring conversion force without making driving power as a detection object. <P>SOLUTION: This state monitoring device is constituted of (a) a distortion detection means for detecting distortion of a switch adjuster, (b) a conversion means for converting the detection value by the distortion detection means into the conversion force by a prescribed conversion rate, and (c) a means for storing or displaying the conversion force converted by the conversion means every conversion time. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a state monitoring device for a turning machine, and more particularly to a device for monitoring the conversion force and return time of the turning machine.

  The failure of the switch that constitutes a part of the convertible lock device has a great influence on train operation. Therefore, appropriate failure prevention and maintenance are required by monitoring the state of the switch. Therefore, until now, a state monitoring device has been developed and put to practical use for electrical switchboards (Non-Patent Documents 1 and 2).

There are two types of turning machines: an electric turning machine and a rolling turning machine. FIG. 21 is a perspective view showing an installation state of the electric turning machine, and FIG. 22 is a view showing a configuration of the rolling turning machine.
The electric switch is indicated by reference numeral SM in FIG. 21, and includes a clutch (friction clutch or magnet clutch), an intermediate gear, a conversion gear, and a conversion roller (not shown) for the rotational force of the motor M driven by electricity. The operation rod 101 is moved forward or backward via the switch, and the tongrel 104 is switched via the switch adjuster rod 102 and the switch adjuster 103 connected to the operation rod 101 (Non-patent Document 3).

  On the other hand, the strut rolling machine is indicated by the symbol SP in FIG. 22, and has a check cylinder 201 at the lower end and a hydraulic cylinder 203 having a needle valve 202 at the upper end and a spring 204. The piston rod 205 of the cylinder, the upper end of the spring 204, the lower end of the spring, and the lower end of the hydraulic cylinder 203 are connected by an upper crank 206 and a lower crank 207, respectively. 21 is transmitted to a switch adjuster similar to the switch adjuster 103 shown in FIG. 21, and the tongler is converted via the switch adjuster. (Position) is secured, and when the train passes in the back, the wheels press the spring pressure and Indexing Le (conversion to), after passing acts to automatically return to localize side by the force of the spring (Non-Patent Document 4).

  One of the obstacles related to the electric switch SM is “unconvertible” in which the conversion operation is not completed. As one of the signs that the conversion is impossible, there may be a case where a load different from the normal conversion is seen on the motor. Focusing on this point, some of the above-described practically used state monitoring devices detect the current / voltage (driving power) of the motor and estimate the conversion force from the detected driving power for monitoring. .

In the rolling rolling machine SP, as in the case of the electric rolling machine, the load force such as friction between the tongleyr and the floor board increases due to rust and scratches, and the return operation is not completed. May occur. However, since the rolling machine does not use electric power for operation as described above, the above-mentioned practical state monitoring device that estimates the conversion force by the driving power is applied to the rolling machine as it is. It is not possible to monitor return force.
Kyosan Circular Vol.41, No.4, pp3-13, 1990 Railway Technical Research Institute Bulletin No.A-86-102, pp1-20, 1986 Introduction to Electricity for Railway Engineers Signal Series 4, Tumbler, pp. 38-54, Japan Railway Electrical Engineering Association, 1992 Introduction to Electricity for Railway Engineers Signal Series 4, Tumbler, pp. 76-82, Japan Railway Electrical Engineering Association, 1992

  The present invention has been made in view of the above points, and a main problem thereof is to provide a state monitoring apparatus for a turning machine capable of measuring a conversion force without using drive power as a detection target. .

The invention according to claim 1 for solving the above-mentioned problem is based on the principle that the distortion of the switch adjuster is detected and the detected distortion is converted into the conversion force at a predetermined conversion rate.
Therefore, an incidental problem of the present invention is to provide a condition monitoring device for a rolling device that can estimate the return time of the rolling device by utilizing the point that the distortion of the switch adjuster is detected. There is to do.

  Another incidental object of the present invention is to provide a condition monitoring device for a tumbling machine capable of measuring a conversion force of the tumbling machine and estimating a return time.

  In order to solve the above-mentioned main problem, the present invention provides a state monitoring device for a switch, comprising: (a) distortion detection means for detecting distortion of the switch adjuster; and (b) detection value by the distortion detection means. The conversion means for converting the conversion power into the conversion power according to the conversion rate of (2), and (c) the conversion power converted by the conversion means is stored or displayed for each conversion. ).

  In order to solve the above-mentioned incidental problems, the present invention relates to a condition monitoring device for a tumbling and turning machine, comprising: (a) distortion detection means for detecting distortion of a switch adjuster; and (d) a detection value by the distortion detection means. A means for recording over time; (e) differentiating the recorded change in detected value, dividing the difference into a region where the differential value is a predetermined constant value or more and another region; Calculate the time between the two points of the slow return start point and the return end point as the return time, with the end of the region as the slow return start point and the end of the second region that exceeds the certain value as the return end point. It is characterized by comprising the arithmetic means to perform (claim 3).

  In order to solve the above-mentioned another incidental problem, the present invention provides a state monitoring device for a tumbling machine, comprising: (a) a strain detecting means for detecting the distortion of the switch adjuster; and (b) the distortion detection. (C) a means for storing or displaying the conversion force converted by the conversion means for each conversion; and (d) the above-mentioned conversion value. Means for recording the detection value by the strain detection means over time; and (e) differentiating the recorded change in the detected value, and dividing it into a region where the differential value is equal to or greater than a predetermined value and a region other than that, With the end of the first region exceeding a certain value as the slow return start point and the end of the second region above the certain value as the return end point, between the slow recovery start point and the return end point Computation means that calculates the time of It is characterized in that the (claim 4).

  In a preferable example of the present invention, the conversion means of the state monitoring device of the turning machine or the conversion means of the state monitoring device for the rolling turning machine is based on a regression equation obtained from the correlation between the strain of the switch adjuster and the temperature. It is desirable to correct the switch adjuster distortion measurement value measured at each conversion (claims 2 and 5).

  The strain detection means includes a strain gauge affixed to the switch adjuster, an amplifier connected to the strain gauge, and a low-pass filter connected to the amplifier.

  The amplifier is preferably an AC amplifier.

  According to the first aspect of the present invention, since the distortion of the switch adjuster is to be detected, it is possible to measure the conversion force of the rolling switch that does not use the driving power, and the electric switching machine that uses the driving power. The conversion force can also be measured.

  According to the invention of claim 3, the strain detection value obtained by the strain detection means affixed to the switch adjuster of the rolling switch is recorded, and the strain detection value is analyzed at either the site or the management office. Thus, it is possible to estimate the return time of the rolling machine.

  According to the invention of claim 4, it is possible to perform both the measurement of the conversion force of the tumbling machine and the estimation of the return time with one state monitoring device.

  According to the second and fifth aspects of the present invention, it is possible to accurately measure the conversion force of the turning machine and estimate the return time of the rolling machine without being affected by changes in the environmental temperature.

  According to the sixth aspect of the present invention, it is possible to provide a state monitoring device for a turning machine that is not easily affected by commercial frequency noise.

  According to the invention of claim 7, it is possible to provide a state monitoring device for a turning machine capable of suppressing the influence of noise at commercial frequencies.

Next, an actual embodiment of the present invention will be described with reference to the drawings.
FIG. 1 is a block diagram conceptually showing the basic configuration of a state monitoring device for a switch according to claim 1, FIG. 2 is a block diagram showing an example of the configuration of distortion detecting means in FIG. 1, and FIG. FIG. 4 is an explanatory diagram showing a position where the strain gauge is attached to the switch adjuster, FIG. 5 is an output waveform diagram of the dynamic strain amplifier, and FIG. Fig. 7 is a graph showing the difference in power spectral density distribution of switch adjuster distortion output from the dynamic strain amplifier when the dynamic strain amplifier is of the AC type and DC type, and Fig. 7 shows the waveform after processing by the low pass filter in the dynamic strain amplifier. FIG. 8 is a diagram showing the conversion force measurement result by the axial force meter, and FIG. 9 is a diagram showing the relationship between the measured value of the axial force meter and the switch adjuster distortion.
FIG. 10 is a block diagram conceptually showing the basic configuration of the state monitoring device for the switch machine according to claim 2, FIG. 11 is a diagram showing the returning operation of the rolling switch machine at the time of index change, and FIG. FIG. 13 is a diagram showing the operation speed from the start of indexing operation to the end of return of the rolling device, FIG. 13 is a diagram showing the relationship between the switch adjuster distortion and the return time, and FIG. 14 is the distortion measurement result during indexing by the vehicle. FIG. 15 is a waveform diagram showing daily changes in relative return force, FIG. 16 is a waveform diagram showing daily changes in contact strain, and FIG. 17 is a diagram showing the relationship between switch adjuster strain and temperature during contact. FIG. 18 is a diagram showing a change in the return time, and FIG. 19 is a diagram showing the relationship between the temperature and the return time.
FIG. 20 is a block diagram conceptually showing the basic structure of the switchboard state monitoring apparatus according to the third aspect.

[Embodiment of the Invention According to Claim 1]
The state monitoring device of the turning machine of the invention according to claim 1 can be applied to both the turning machine and the electric turning machine. An embodiment in a case where the present invention is simply applied to a turning machine will be described.

  As shown in FIG. 1, the state monitoring apparatus A according to this embodiment includes a distortion detection unit a, and a conversion unit b that converts the distortion detected by the distortion detection unit a into a conversion force based on a predetermined conversion rate. And means c for storing the conversion force converted by the conversion means and / or means d for displaying the conversion force. Hereinafter, each means will be described in detail.

  The strain detection means a is conceptually shown in FIG. 2 and, as shown in FIG. 3, an installation example, includes a strain gauge 1, a bridge circuit 2, a rod-shaped displacement meter 3, a dynamic strain amplifier 4, and a logger 5. It is configured. Reference numeral 2 ′ in FIG. 3 denotes a bridge box that accommodates the bridge circuit 2.

  The strain gauge 1 is a sensor that converts a rate of expansion / contraction due to a force applied to the switch adjuster 103 into a change in electrical resistance. As shown in FIG. 3, when the strain gauge 1 is changed to the “push” direction of the switch adjuster 103 as viewed from the switch SP, the strain gauge 1 appears from below the switch SP, When it changes direction, it is affixed to the part hidden under the machine SP.

  The strain gauge 1 is connected to the bridge circuit 2 in order to amplify the change in resistance. The output of the bridge circuit 2 is input to the dynamic distortion amplifier 4 accommodated in the instrument box 6 via the cable, and the strain measurement value output from the dynamic distortion amplifier 4 is the logger also accommodated in the instrument box 6. 5 are sequentially recorded.

  The amplification factor of the strain by the bridge circuit 2 and the dynamic strain amplifier 4 varies depending on the application form of the strain gauge. As an example, the switch adjuster 103 to be used has a diameter of 36 mm and an adhesive force / conversion force of about 2 kN (200 kgf). Therefore, the axial strain of the switch adjuster 103 is a low value of about 10 με. Therefore, in a preferred embodiment, as a strain gauge mounting mode, as shown in FIG. 4A, two switches are attached in the axial direction and the circumferential direction of the switch adjuster 103. The law was adopted.

  FIG. 4B shows the configuration of the “1 gauge method” bridge circuit when only one strain gauge is attached in the axial direction of the switch adjuster 103. In the case of the “4-gauge method”, the resistance change due to expansion / contraction of the axially attached gauge (ε1, ε3) is ΔR, and the resistance change due to expansion / contraction of the circumferential adhesive gauge (ε2, ε4) is ΔRv (v = 0.3). The ratio of the 4 gauge and 1 gauge strain gains is 2.6: 1. It was also confirmed by experiments that the “4-gauge method” has the highest amplification factor and the effect of temperature is small.

  The rod-shaped displacement meter 3 is a sensor that converts the displacement of the switch adjuster into a change in electrical resistance. However, in a preferred embodiment of the present invention, the displacement of the lock lock of the electromagnetic locking device (not shown). It is used to detect “indexing” from, and use it as a trigger for starting conversion force measurement. This rod-shaped displacement meter 3 is provided for surely measuring with a general-purpose measuring device. However, when a dedicated strain measuring device is prepared, a trigger can be applied from a distortion measurement waveform. Is no longer needed.

  The dynamic strain amplifier 4 is for amplifying the outputs of the bridge circuit 2 and the rod-shaped displacement meter 3 to which the strain gauge 1 is connected, and converting this into a change in DC voltage. The dynamic distortion amplifier 4 is classified into a direct current type and an alternating current type depending on the type of current flowing through the bridge circuit 2. The DC distortion amplifier is economically superior to the AC type, but as shown in FIG. 5, since it is affected by noise mainly including commercial frequency components, the DC distortion amplifier alone has a restoring force, It is difficult to determine the return time.

  Therefore, the inventor measured the strain at the lower part of the switch adjuster of the electric switch by changing the conditions of the strain gauge, strain amplifier, power supply system, and low-pass filter, and examined the device configuration that is less susceptible to noise. went.

  The table in FIG. 23 shows test conditions and power spectral density (PSD) near 50 Hz, and FIG. 6 shows the power spectral density distribution as a measurement result in each configuration. FIG. 7 shows a waveform after processing by the low-pass filter. From this result, it can be seen that when a DC distortion amplifier is used, the influence of commercial frequency noise can be suppressed by using a battery or an insulation amplifier and using a low-pass filter. It can also be seen that when an AC amplifier is used and a built-in low-pass filter is used, it is least affected by commercial frequency noise.

  Based on the test results, in the embodiment, the dynamic distortion amplifier 4 measures the distortion of the switch adjuster 103 using the distortion detection means a that is a combination of an AC amplifier and a low-pass filter. The amplified distortion measurement is provided to the logger 5. The logger 5 records the distortion amplified by the dynamic distortion amplifier 4. It is configured to record the strain measured by the strain gauge for a certain period of time before and after the time when the displacement of the locking mechanism of the electromagnetic locking device measured by the rod-shaped displacement meter 2 changes. .

  The strain measurement value obtained by the strain detection means a and recorded in the logger 5 is converted into a conversion force by the conversion means b. In the method of converting the distortion measurement value by the conversion means b into the conversion force, the conversion force and the distortion during the actual conversion operation of the switching machine are measured, and a regression equation is obtained from the relationship between the conversion force and the distortion, There is a method of obtaining the conversion force from each strain measurement value using the regression equation. Another method is to create and store a conversion table based on the relationship between the conversion force and strain obtained from the field test of the turning machine, look up the conversion table from the obtained strain measurement value, and then convert the conversion table. It is also possible to use a method for determining.

  In order to relate the distortion of the switch adjuster of the actual switch and the conversion force / restoring force, a known jaw pin type axial force meter is inserted in place of the jaw pin connecting the operation lever and the switch adjuster. The conversion and return forces were measured directly. FIG. 8 shows the relationship between the measured value of the axial force meter and the distortion of the switch adjuster. FIG. 8 shows the results of measuring the conversion force with an axial force meter. FIG. 9 shows the relationship between the axial force meter measurement value and the switch adjuster distortion. The regression line was calculated | required from the measured value using an axial force meter. RL in FIG. 9 indicates a regression line. From this regression line, the regression equation shown in [Formula 1] was obtained.

  Thus, the strain measurement value obtained by the strain detection means a is converted into a conversion force by the conversion means b using the regression equation. When the storage means c is connected to the conversion means b, the converted conversion force is stored in the storage means. The stored data is later read out by a device connected to the conversion force measuring device and used for outputting to a display device or a printer.

  Further, when the storage means c and the display means d are connected to the conversion means b, the stored data can be read out and displayed on the display device immediately or at any time. By comparing the output or displayed conversion force with the reference conversion force measured in advance when the switch is normal, the switch is faulty or near to failure Such state monitoring can be performed.

  As described above, the state monitoring device A of the turning machine according to the first aspect of the present invention is to detect the distortion of the switch adjuster, and thus can be applied to both the rolling turning machine and the electric turning machine. Is possible. Further, in a turning machine using a plurality of switch adjusters connected by an escape crank, the conversion force is measured for each switch adjuster.

[Embodiment of Invention of Claim 2]
Next, an embodiment of the invention according to claim 2 will be described. The condition monitoring device B for the tumbling machine according to the present invention is such that the invention of claim 1 further develops the point that the distortion of the switch adjuster is detected, and estimates the conversion time of the tumbling machine. It is a thing.

  The return time, which is a maintenance adjustment item of the rolling device, is conventionally timed by judging the timing of the return start and return end by the visual and auditory sense of the measurer. However, this method can only be performed during maintenance. Therefore, in the present invention, a method for recording the distortion of the switch adjuster in time series and estimating the return time using the time history response was studied.

  As shown in FIG. 10, the condition monitoring device B for the tumbling and turning machine includes a distortion detection means a, a recording means e for recording the detected distortion, and a calculation means for calculating a return time from the recorded distortion measurement value. f.

  The state of the return operation by the action of the spring and the cylinder in the tumbling and rolling machine at the time of “index change” in which the tongrel is moved by the approaching vehicle in the back sky is as shown in FIG. As shown in FIG. 12, the rolling rolling machine has a mechanism that changes the flow area of the working oil inside the cylinder in accordance with the Tongleil stroke. The return force is controlled while changing.

  The strain detection means a is the same as described above. Usually, as shown in FIG. 13, the distortion of the switch adjuster greatly changes in the amount of distortion when indexing and when returning from medium speed to when returning to high speed. On the other hand, the amount of distortion is small when in a close contact state before switching or after returning or when returning slowly.

  Paying attention to this, the calculation means f sequentially differentiates the strain measurement values inputted from the recording means e, and the area where the distortion differential value is equal to or greater than a certain value (area A surrounded by a chain line rectangle in FIG. 13). , B), the end of the region A that is equal to or greater than a certain value is first determined to be the slow return start point, and the end of the region B that is equal to or greater than the certain value is then determined to be the return end point. Subsequently, the computing means f is configured to output the time between two points of the slow return start point and the return end point calculated from the strain measurement value as the return time.

  Region A. For the detection of B, a waveform shaping technique for converting the signal waveform into a rectangular wave can be used to recognize the end of the first rectangular wave as the return start point and the end of the next rectangular wave as the return end point.

[Long-term measurement of return time and correction based on the result]
Using the above conversion force measurement and conversion time estimation method, the conversion force and return time were measured for the stroking machine on the main line. In addition, a long-term change in the condition of the tumbling machine was investigated.
(A) Switch Adjuster Distortion FIG. 14 shows the measurement results for one switch adjuster strain change. It can be read from the waveform that the tongrel is determined by the vehicle (four cars) between about 0 s (seconds) and 8 s and then returned between about 8 s and 11 s. Further, since the difference between the switch adjuster strain in the close contact state and the strain at the slow return is obtained, the difference between the close contact force and the return force (hereinafter referred to as a relative return force) can be obtained from Equation (1). . FIG. 15 shows the relative return force for each conversion. The relative return force is said to indicate a margin of the ability of the tumbling machine with respect to the load at the time of return conversion, and it can be considered that the smaller the difference, the greater the load.

  FIG. 16 shows the switch adjuster distortion at the time of close contact for each change (from −2 s to 0 s in FIG. 14). It was found that the switch adjuster distortion during close contact changes with each change. This is a phenomenon seen because the apparent strain was measured due to the linear expansion coefficient of the gauge and the switch adjuster being affected by the fact that the adhesion force actually changed or the strain amount to be measured was small. It is done. Qualitatively, the change tends to be large during fine weather. Therefore, a temperature sensor was affixed in the vicinity of the strain gauge application location of the switch adjuster, and the switch adjuster strain and the switch adjuster temperature in the vicinity of the strain gauge application location were measured simultaneously. FIG. 17 shows the measurement results.

  From this measurement result, it can be seen that there is a correlation between the measured value of the switch adjuster strain and the temperature of the switch adjuster. From this, it is considered that the phenomenon that the strain at the time of close contact changes with each change is due to temperature. Further, if the temperature is measured simultaneously with the strain of the switch adjuster and the temperature of the strain measurement value can be corrected, the absolute values of the adhesion force and the conversion force can be obtained.

  The switch adjuster distortion at the time of close contact has a correlation with the switch adjuster temperature as shown in FIG. In this case, the correlation coefficient is 0.816, and the regression equation is as shown in [Equation 2].

  Accordingly, in order to determine whether or not the switch adjuster strain actually measured by the strain gauge is an appropriate value, the conversion means b uses the measured temperature input from the temperature sensor provided near the strain gauge mounting position as the regression. The distortion measurement value input from the logger 5 of the distortion detector a is appropriately corrected by substituting into the equation.

(B) Return time FIG. 18 shows the change in return time for each conversion, and FIG. 19 shows the relationship between average temperature and average return time for each measurement period. From FIG. 18, it was confirmed that the return time did not change significantly in a short period. On the other hand, it was confirmed from FIG. 19 that the recovery time changes in the long term, the recovery time is short in the period when the average temperature is high, and the recovery time is long in the period where the average temperature is low.

  Therefore, the return time can be obtained by shaping the output waveform from the dynamic strain amplifier and measuring the time between the slow return start point and the return end point, and by comparing the obtained value with the appropriate value, Appropriateness of the state of the machine can be determined.

  In maintenance of the rolling device, the return time is set to an appropriate value of 4 to 8 seconds. When the obtained value is not an appropriate value, the return time may be adjusted by adjusting the opening / closing amount of the needle valve of the rolling device, that is, the flow passage area at the slow return.

[Embodiment of Invention of Claim 3]
FIG. 20 shows a state monitoring device AB for a rolling tumbler constituted by integrating the state monitoring device A of FIG. 1 and the state monitoring device B of FIG. Therefore, this apparatus AB can measure the conversion force of the tumbler and estimate the return time and monitor the state.

  In the state monitoring device according to the present invention, the conversion force measurement and the return time monitoring by measuring the strain of the switch adjuster are not limited to the tumbling switch, but are provided in the electric switch and a plurality of convertible lock devices for the Shinkansen. It can be widely used for measuring the conversion force at the crank.

The block diagram which shows notionally the basic composition of the state monitoring apparatus of the switch machine which concerns on Claim 1. The block diagram which shows an example of a structure of the distortion detection means in FIG. The copying figure which shows the example of installation of the state monitoring apparatus of the switch machine which concerns on Claim 1. Explanatory drawing about the sticking position with respect to the switch adjuster of a strain gauge. Output waveform diagram of the dynamic distortion amplifier. The graph which shows the difference in the power spectrum density distribution of the switch adjuster distortion which a dynamic distortion amplifier outputs when a dynamic distortion amplifier is an alternating current type and a direct current type. The figure which shows the waveform after processing with a low-pass filter with dynamic distortion amplifier. The figure which shows the conversion force measurement result by an axial force meter. The figure which shows the relationship between an axial force meter measured value and switch adjuster distortion. The block diagram which shows notionally the basic composition of the state monitoring apparatus of the switch machine which concerns on Claim 2. The figure which shows the return operation | movement of the stalk rolling machine at the time of index conversion. The figure which shows the operation | movement speed from the start of indexing operation | movement of a rolling device to return end. The figure which shows the relationship between switch adjuster distortion and reset time. The figure which shows the distortion measurement result at the time of the indexing by a vehicle. The wave form diagram which shows the daily change of a relative return force. The wave form diagram which shows the change every day of distortion at the time of adhesion | attachment. The figure which shows the relationship between the distortion of a switch adjuster at the time of contact | adherence, and temperature. The figure which shows the change of return time. The figure which shows the relationship between temperature and return time. The block diagram which shows notionally the basic composition of the state monitoring apparatus of the switch machine which concerns on Claim 3. The figure which shows the installation state of an electric switch. The figure which shows the structure of a tumbling rolling machine. It is a table | surface which shows test conditions and the power spectrum density of 50 Hz vicinity.

Explanation of symbols

DESCRIPTION OF SYMBOLS A State monitoring apparatus of a turning machine a Strain detection means b Conversion means c Memory | storage means 1 Strain gauge 2 Bridge circuit 3 Bar-shaped displacement meter 4 Dynamic strain amplifier 5 Logger B, AB State monitoring apparatus for oscillating turning machine d Display means e Recording means f Calculation means SP Deflection machine 103 Switch adjuster

Claims (7)

Distortion detecting means for detecting distortion of the switch adjuster;
The detection value by the distortion detection means is constituted by conversion means for converting to conversion power at a predetermined conversion rate, and means for storing or displaying the conversion power converted by the conversion means for each conversion. A state-of-the-art monitoring device.   2. The conversion unit according to claim 1, wherein the conversion unit corrects a measured value of the switch adjuster strain measured at each conversion by a regression equation obtained from a correlation between the strain of the switch adjuster and the temperature. A state monitoring device for a telescope. Distortion detecting means for detecting distortion of the switch adjuster;
Means for recording the detection value by the distortion detection means over time;
Differentiate the recorded change in detected value, divide it into a region where the differential value is equal to or greater than a predetermined value and other regions, and the end of the first region where the differential value is equal to or greater than a certain value And a calculation means for calculating the time between the two points of the slow return start point and the return end point as a return time, with the end of the second region that is equal to or greater than the value as the return end point. Condition monitoring device for tumbling machine. Distortion detecting means for detecting distortion of the switch adjuster;
Conversion means for converting the detection value by the distortion detection means into conversion force at a predetermined conversion rate; means for storing or displaying the conversion force converted by the conversion means for each conversion;
Means for recording the value detected by the distortion detection means over time;
Differentiate the recorded change in detected value, divide it into a region where the differential value is equal to or greater than a predetermined value and other regions, and the end of the first region where the differential value is equal to or greater than a certain value And a calculation means for calculating the time between the two points of the slow return start point and the return end point as a return time, with the end of the second region that is equal to or greater than the value as the return end point. Condition monitoring device for tumbling machine.   5. The generating device according to claim 4, wherein the conversion means corrects the switch adjuster strain measurement value measured at each conversion by a regression equation obtained from the correlation between the strain of the switch adjuster and the temperature. A state monitoring device for turning machines.   The strain detection means comprises a strain gauge affixed to the switch adjuster, an amplifier connected to the strain gauge, and a low-pass filter connected to the amplifier. The state monitoring device of the turning machine as described in the paragraph.   6. The state monitoring device for a switch machine according to claim 5, wherein the amplifier is an AC amplifier.

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