WO2017082298A1 - 組付状態の診断装置 - Google Patents
組付状態の診断装置 Download PDFInfo
- Publication number
- WO2017082298A1 WO2017082298A1 PCT/JP2016/083239 JP2016083239W WO2017082298A1 WO 2017082298 A1 WO2017082298 A1 WO 2017082298A1 JP 2016083239 W JP2016083239 W JP 2016083239W WO 2017082298 A1 WO2017082298 A1 WO 2017082298A1
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- WIPO (PCT)
- Prior art keywords
- heat flux
- sensor
- heat
- flux sensor
- sensor unit
- Prior art date
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-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M99/00—Subject matter not provided for in other groups of this subclass
- G01M99/002—Thermal testing
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01K—MEASURING TEMPERATURE; MEASURING QUANTITY OF HEAT; THERMALLY-SENSITIVE ELEMENTS NOT OTHERWISE PROVIDED FOR
- G01K17/00—Measuring quantity of heat
- G01K17/06—Measuring quantity of heat conveyed by flowing media, e.g. in heating systems e.g. the quantity of heat in a transporting medium, delivered to or consumed in an expenditure device
- G01K17/08—Measuring quantity of heat conveyed by flowing media, e.g. in heating systems e.g. the quantity of heat in a transporting medium, delivered to or consumed in an expenditure device based upon measurement of temperature difference or of a temperature
- G01K17/20—Measuring quantity of heat conveyed by flowing media, e.g. in heating systems e.g. the quantity of heat in a transporting medium, delivered to or consumed in an expenditure device based upon measurement of temperature difference or of a temperature across a radiating surface, combined with ascertainment of the heat transmission coefficient
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01K—MEASURING TEMPERATURE; MEASURING QUANTITY OF HEAT; THERMALLY-SENSITIVE ELEMENTS NOT OTHERWISE PROVIDED FOR
- G01K1/00—Details of thermometers not specially adapted for particular types of thermometer
- G01K1/16—Special arrangements for conducting heat from the object to the sensitive element
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01K—MEASURING TEMPERATURE; MEASURING QUANTITY OF HEAT; THERMALLY-SENSITIVE ELEMENTS NOT OTHERWISE PROVIDED FOR
- G01K13/00—Thermometers specially adapted for specific purposes
- G01K13/04—Thermometers specially adapted for specific purposes for measuring temperature of moving solid bodies
- G01K13/08—Thermometers specially adapted for specific purposes for measuring temperature of moving solid bodies in rotary movement
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M13/00—Testing of machine parts
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M13/00—Testing of machine parts
- G01M13/04—Bearings
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B19/00—Testing; Calibrating; Fault detection or monitoring; Simulation or modelling of fluid-pressure systems or apparatus not otherwise provided for
- F15B19/005—Fault detection or monitoring
Definitions
- the present invention relates to an assembly state diagnosis device for diagnosing the assembly state of an assembly part having a sliding portion.
- Patent Document 1 As a heat flux sensor for detecting a heat flux, for example, there is one disclosed in Patent Document 1.
- an object of the present invention is to provide an assembly state diagnosis device capable of diagnosing whether or not an assembly state of an assembly component is appropriate.
- a first form of the assembled state diagnostic device is an assembled state diagnostic device for diagnosing the assembled state of an assembled part having a sliding portion, and the heat flux flowing from the sliding portion toward the outside And a determination unit that determines whether or not the assembled state of the assembled component is appropriate based on the detection result detected by the sensor unit.
- FIG. 4 is a cross-sectional view of the heat flux sensor taken along line IV-IV shown in FIG. 3.
- FIG. 3 It is a figure which shows the output waveform of a sensor part when the preload state of a bearing is appropriate.
- FIG. 3 shows the output waveform of a sensor part when the preload state of a bearing is an excessive preload and insufficient preload.
- FIG. 10 is a view on the arrow X of the transfer device in FIG. 9. It is a figure which shows the output waveform of a sensor part when the assembly
- the assembled state diagnosis device 1 As shown in FIG. 1, the assembled state diagnosis device 1 according to the present embodiment diagnoses the assembled state of the support mechanism 200 for the rotating shaft.
- the support mechanism 200 is provided in a production facility or the like.
- the support mechanism 200 includes a rotating shaft 201, a plurality of bearings 202, a housing 203, and a cover 204.
- Rotating shaft 201 rotates about axis CL.
- An adjustment nut 205 is attached to the rotary shaft 201.
- the adjustment nut 205 is a member for adjusting the preload.
- the bearing 202 is a part that supports the rotating shaft 201.
- the bearing 202 is an assembly part having a sliding portion.
- the plurality of bearings 202 are respectively disposed on the first direction side and the second direction side in the axial direction CL of the rotating shaft 201.
- one bearing 202 is disposed on the first direction side in the axial direction CL.
- Two bearings 202 are arranged on the second direction side in the axial direction CL.
- the bearing 202 includes an inner ring 211, an outer ring 212, and balls 213 as rolling elements.
- An inner ring 211 is fixed to the rotating shaft 201.
- An outer ring 212 is fixed to the housing 203.
- the inner ring 211 rotates with the rotation shaft 201.
- the inner ring 211, the outer ring 212, and the ball 213 slide against each other while being rubbed. That is, a portion of the inner ring 211 and the outer ring 212 that slides while rubbing with the ball 213 becomes a sliding portion.
- the housing 203 is a support member that supports the plurality of bearings 202.
- a plurality of bearings 202 are housed inside the housing 203.
- the cover 204 covers the opening of the housing 203.
- the cover 204 is fixed to the housing 203 by a fixing nut 206.
- the support mechanism 200 includes an inner ring side spacer 207 and an outer ring side spacer 208.
- the inner ring side spacer 207 is sandwiched between the inner ring 211 located on the first direction side in the axial direction CL and the inner ring 211 located on the second direction side.
- the outer ring side spacer 208 is sandwiched between the outer ring 212 located on the first direction side in the axial direction CL and the outer ring 212 located on the second direction side.
- the preload adjustment is performed after the components of the support mechanism 200 such as the rotary shaft 201, the bearing 202, and the housing 203 are combined as shown in FIG.
- the preload is a load applied in advance to the bearing 202 in order to eliminate the internal clearance of the bearing 202.
- the preload adjustment is performed, for example, by tightening the adjustment nut 205 so as to press the inner rings 211 positioned on the first direction side and the second direction side in the axial direction CL. By shifting the inner ring 211 and the outer ring 212 in the direction of the axis CL, the ball 213 is pressed between the inner ring 211 and the outer ring 212.
- the diagnostic device 1 includes a sensor unit 2, a control device 3, and a display device 4.
- Sensor unit 2 detects the heat flux from the bearing 202 toward the outside.
- the sensor unit 2 outputs a sensor signal corresponding to the heat flux from the bearing 202 to the outside toward the control device 3.
- the sensor unit 2 is attached to the surface of the housing 203. Details of the structure of the sensor unit 2 will be described later.
- two sensor units 2 a and 2 b are used as the sensor unit 2.
- the 1st sensor part 2a is arrange
- the 2nd sensor part 2b is arrange
- the sensor unit 2 is connected to the input side of the control device 3.
- the control device 3 performs diagnostic control of the assembled state of the bearing 202.
- the assembled state of the bearing 202 is a preload state of the bearing 202.
- This diagnostic control is control for determining whether the assembled state of the bearing 202 is appropriate based on the detection result of the sensor unit 2. Therefore, the control device 3 constitutes a determination unit that determines whether the assembled state of the bearing 202 is appropriate based on the detection result of the heat flux sensor 10.
- the display device 4 is connected to the output side of the control device 3.
- the control device 3 causes the display device 4 to display the determination result.
- the control device 3 includes a microcomputer, a storage device, and the like.
- the display device 4 is a notification device for notifying the user of the determination result.
- a liquid crystal display or the like is used as the display device 4.
- the sensor unit 2 includes two heat flux sensors 10, a thermal buffer 11, and a radiator 12.
- the two heat flux sensors 10, the thermal buffer 11, and the radiator 12 are all flat.
- the internal structure of the two heat flux sensors 10 is the same.
- One of the two heat flux sensors 10 is the first heat flux sensor 10a.
- the other of the two heat flux sensors 10 is the second heat flux sensor 10b.
- the first heat flux sensor 10 a is disposed in contact with the outer surface of the housing 203.
- the second heat flux sensor 10b is disposed on the side away from the housing 203, that is, the bearing 202, with respect to the first heat flux sensor 10a.
- the thermal buffer 11 is disposed between the first heat flux sensor 10a and the second heat flux sensor 10b.
- the radiator 12 is disposed on the side away from the bearing 202 with respect to the second heat flux sensor 10b. That is, in the sensor unit 2, the first heat flux sensor 10a, the thermal buffer 11, the second heat flux sensor 10b, and the radiator 12 are arranged in this order from the side closer to the bearing 202 toward the side away from the bearing 202. Yes.
- the first heat flux sensor 10a outputs a first sensor signal corresponding to the heat flux passing through the first heat flux sensor 10a from the bearing 202 side of the first heat flux sensor 10a toward the heat buffer 11 side.
- the second heat flux sensor 10b outputs a second sensor signal corresponding to the heat flux passing through the second heat flux sensor 10b from the heat buffer 11 side of the second heat flux sensor 10b toward the opposite side.
- the planar shape of each of the first heat flux sensor 10a and the second heat flux sensor 10b is a rectangle having the same shape and size.
- the heat buffer 11 has a predetermined heat capacity.
- the thermal buffer 11 is made of a metal material or a resin material. As will be described later, the material and thickness of the thermal buffer 11 are set so as to have a heat capacity capable of detecting a change in the heat flux emitted from the bearing 202 toward the outside.
- the planar shape of the thermal buffer 11 is the same as the planar shape and shape of the first heat flux sensor 10a. The planar shape of the thermal buffer 11 may be different from the planar shape and shape of the first heat flux sensor 10a.
- the heat radiator 12 has a predetermined heat capacity.
- the radiator 12 is made of a metal material or a resin material. The material and thickness of the radiator 12 are set so that the heat capacity thereof is larger than the heat capacity of the heat buffer 11.
- the planar shape of the heat radiating body 12 is larger than the planar shapes of the first heat flux sensor 10a, the heat buffer 11, and the second heat flux sensor 10b.
- the radiator 12 is fixed to the housing 203 with the first heat flux sensor 10a, the thermal buffer 11, and the second heat flux sensor 10b interposed therebetween. Specifically, screw holes are formed in the outer peripheral portion of the radiator 12.
- the radiator 12 is fixed to the housing 203 by screws 13 inserted into the screw holes.
- a spacer 14 is disposed between the housing 203 and the radiator 12. The screw 13 passes through the inside of the spacer 14.
- the insulating base material 100, the surface protection member 110, and the back surface protection member 120 are integrated, and the first and second thermoelectric elements are integrated in the integrated body.
- the members 130 and 140 are alternately connected in series.
- the surface protection member 110 is omitted.
- the insulating base material 100, the surface protection member 110, and the back surface protection member 120 are in the form of a film and are made of a flexible resin material such as a thermoplastic resin.
- the insulating base material 100 is formed with a plurality of first and second via holes 101 and 102 penetrating in the thickness direction.
- First and second thermoelectric members 130 and 140 made of different thermoelectric materials such as metals and semiconductors are embedded in the first and second via holes 101 and 102.
- the first connection portions of the first and second thermoelectric members 130 and 140 are constituted by the surface conductor pattern 111 arranged on the surface 100 a of the insulating base material 100.
- the second connection portions of the first and second thermoelectric members 130 and 140 are configured by the back surface conductor pattern 121 disposed on the back surface 100 b of the insulating base material 100.
- thermoelectromotive force is generated in the first and second thermoelectric members 130 and 140 by the Seebeck effect.
- the heat flux sensor 10 outputs this thermoelectromotive force, specifically, a voltage as a sensor signal.
- the first heat flux sensor 10a and the second heat flux sensor 10b are configured to output sensor signals having the same absolute value when the heat fluxes passing through the same have the same magnitude. ing.
- the first heat flux sensor 10a and the second heat flux sensor 10b are electrically connected to the control device 3 while being connected in series with each other.
- the first heat flux sensor 10a and the second heat flux sensor 10b have a relationship in which the polarities are opposite when the heat flux from the bearing 202 sequentially passes through the first heat flux sensor 10a and the second heat flux sensor 10b. It arrange
- the first and second heat flux sensors 10a and 10b are arranged so that the surface protection members 110 face each other.
- the surface conductor patterns 111 of the first and second heat flux sensors 10 a and 10 b are connected to each other through the external wiring 151.
- the back conductor patterns 121 of the first and second heat flux sensors 10 a and 10 b are connected to the control device 3 via the external wiring 152. Accordingly, when the heat flux passes through the first heat flux sensor 10a from the back surface protection member 120 side to the surface protection member 110 side, the heat flux protects the second heat flux sensor 10b from the surface protection member 110 side to the back surface protection. It passes to the member 120 side. Therefore, the polarities of the first and second sensor signals output from the first and second heat flux sensors 10a and 10b are opposite.
- the first and second heat flux sensors 10a and 10b output a positive sensor signal when the heat flux passes from the back surface protection member 120 side to the surface protection member 110 side. For this reason, when a heat flux flows from the bearing 202 side toward the radiator 12 side, a positive sensor signal is output from the first heat flux sensor 10a, and a negative sensor signal is output from the second heat flux sensor 10b. .
- the sensor unit 2 outputs a sensor signal, which is a combination of the first sensor signal and the second sensor signal, to the control device 3.
- a sensor signal which is a combination of the first sensor signal and the second sensor signal
- the sensor signal output from the sensor unit 2 becomes large.
- Such a case corresponds to, for example, a case where the heat flux released from the object increases rapidly.
- the difference between the heat fluxes passing through the first and second heat flux sensors 10a and 10b is small, the output output from the sensor unit 2 is small.
- Such cases include, for example, when the heat flux released from the object decreases or when the heat flux released from the object is constant and a predetermined time has elapsed.
- the sliding portion of the bearing 202 when the rotary shaft 201 rotates, the sliding portion of the bearing 202 generates heat. When the rotation of the rotating shaft 201 stops, the sliding portion of the bearing 202 does not generate heat. Therefore, when the rotating shaft 201 repeats rotating and stopping, the heat flux from the sliding portion of the bearing 202 to the outside repeatedly increases and decreases. For this reason, when the bearing 202 is in an appropriate preload state, the waveform indicating the change in the output value of the sensor unit 2 over time is regulated along the rotation and stop cycles of the rotating shaft 201 as shown in FIG. Waveforms that increase or decrease automatically.
- the reason for this is as follows. As described above, when the rotating shaft 201 repeats rotating and stopping, the heat flux from the sliding portion of the bearing 202 to the outside repeatedly increases and decreases. At this time, as shown in FIG. 2, the first heat flux sensor 10 a has nothing to block the heat flux from the housing 203. For this reason, the heat flux passing through the first heat flux sensor 10 a increases or decreases in the same manner as the heat flux flowing through the housing 203.
- the heat buffer 11 is arrange
- the heat flux passing through the second heat flux sensor 10b gradually increases and decreases with a delay from the heat flux passing through the first heat flux sensor 10a.
- the sensor signal output from the sensor unit 2 toward the control device 3 is a combination of the first sensor signal and the second sensor signal. For this reason, the output value of the sensor unit 2 regularly increases or decreases along with the rotation and stop cycle of the rotating shaft 201.
- the bearing 202 When the bearing 202 is in an excessive preload state, the friction at the sliding portion of the bearing 202 increases. For this reason, when the rotating shaft 201 rotates, the amount of heat generated by the sliding portion of the bearing 202 increases. Therefore, when the bearing 202 is in an excessive preload state, as shown by the solid line in FIG. 6, the output of the sensor unit 2 at the time of rotation is compared with the output value of the sensor unit 2 when the preload is appropriate indicated by the wavy line. The value increases.
- the output value of the sensor unit 2 varies depending on whether the preload state of the bearing 202 is appropriate preload, excessive preload, or insufficient preload. Therefore, an upper limit threshold value for discriminating between an appropriate preload state and an excessive preload state, and a lower limit threshold value for discriminating between an appropriate preload state and an insufficient preload state are set in advance. Then, the output value of the sensor unit 2 is compared with the upper and lower thresholds. Thereby, it can be determined whether the preload state of the bearing 202 is appropriate.
- the control device 3 diagnoses the assembled state based on the detection result of the sensor unit 2.
- Each step shown in FIG. 7 constitutes a function realization unit that realizes various functions. This diagnosis is performed for each detection result of the sensor unit 2a and the sensor unit 2b.
- step S1 the control device 3 acquires the detection value of the sensor unit 2.
- an output value (specifically, a voltage value) of the sensor unit 2 at a predetermined time is acquired.
- a correction value obtained by correcting the output value may be acquired as a detection value.
- step S2 the control device 3 compares the detected value with an upper limit threshold and a lower limit threshold stored in advance in the storage device, and determines whether or not the detected value is within an appropriate range. If the detected value is a value between the upper limit threshold and the lower limit threshold, that is, if the detected value is within the appropriate range, the control device 3 determines YES and proceeds to step S3. In step S3, the control device 3 outputs a control signal for causing the display device 4 to display that the preload state is appropriate. Thereby, the display device 4 displays that the preload state is appropriate.
- step S2 if the detected value exceeds the upper threshold value in step S2, or if the detected value is lower than the lower threshold value, that is, if the detected value is outside the appropriate range, the control device 3 makes a NO determination and proceeds to step S4. move on.
- step S4 the control device 3 outputs a control signal for causing the display device 4 to display that the preload state is inappropriate. Thereby, the display device 4 displays that the preload state is inappropriate.
- a display may be displayed indicating that the preload state is an excessive preload state or a preload insufficient state.
- the diagnostic device 1 of the present embodiment it is possible to diagnose whether or not the preload state of the bearing 202 is appropriate.
- the sensor unit 2 includes the thermal buffer 11 between the first heat flux sensor 10a and the second heat flux sensor 10b.
- the control device 3 determines whether or not the preload state of the bearing 202 is appropriate based on the first sensor signal output from the first heat flux sensor 10a and the second sensor signal output from the second heat flux sensor 10b.
- the heat buffer 11 accumulates and releases heat. For this reason, when the heat flux released from the sliding portion of the bearing 202 changes, the heat flux passing through the second heat flux sensor 10b is slower and slower than the heat flux passing through the first heat flux sensor 10a. To change. Therefore, a change in the heat flux emitted from the sliding portion of the bearing 202 can be detected from the difference between the first sensor signal and the second sensor signal.
- the heat flux emitted from the sliding portion of the bearing 202 can be detected even if only one heat flux sensor 10 is used instead of the sensor portion 2 of the present embodiment.
- the heat flux passing through the heat flux sensor 10 also changes under the influence of the environmental temperature. That is, even when the heat generation amount at the sliding portion of the bearing 202 is the same, the heat flux passing through the heat flux sensor 10 is larger when the environmental temperature is low and when the environmental temperature is high and low. .
- the control device 3 erroneously determines that the preload state of the bearing 202 is not appropriate. In order to avoid this erroneous determination, it is conceivable to set the upper limit threshold value high in consideration of the environmental temperature fluctuation. However, in this case, even if the preload state of the bearing 202 is an excessive preload state, it is erroneously determined as appropriate.
- the first heat flux sensor 10a and the second heat flux sensor 10b of the sensor unit 2 of the present embodiment are arranged on both sides of the heat buffer 11. Therefore, both are arranged in a relatively close position.
- a change in the environmental temperature around the sensor unit 2 usually occurs gradually over a long period of one day. For this reason, even if the thermal buffer 11 is disposed between the first heat flux sensor 10a and the second heat flux sensor 10b, the influence of the first heat flux sensor 10a and the second heat flux sensor 10b on the environmental temperature is not affected. Same or close to the same.
- Each of the first heat flux sensor 10a and the second heat flux sensor 10b outputs a sensor signal corresponding to the heat flux affected by the same environmental temperature.
- the absolute values of the outputs for the same heat flux size are the same. Therefore, by using the sum of the outputs of the first heat flux sensor 10a and the second heat flux sensor 10b, the influence of the environmental temperature on the detection result of the sensor unit 2 can be excluded (that is, canceled).
- the output waveform of the sensor unit 2 when the bearing 202 is in the proper preload state is one in which the influence of the environmental temperature is excluded, like the output waveform when the preload is appropriate as shown in FIG.
- the output waveform when the preload is appropriate as shown in FIG.
- the assembled state of the bearing 202 can be diagnosed with high accuracy.
- the absolute values of the outputs for the same heat flux size are not necessarily the same. It is only necessary that the absolute values of both outputs are close. Even in this case, the influence of the environmental temperature on the detection result of the sensor unit 2 can be reduced by using the sum of the outputs of the first heat flux sensor 10a and the second heat flux sensor 10b.
- the first heat flux sensor 10a and the second heat flux sensor 10b are configured such that the heat flux from the sliding portion of the bearing 202 is the first heat flux sensor 10a and the second heat flux sensor 10b.
- the first sensor signal and the second sensor signal having opposite polarities are output.
- the first heat flux sensor 10a and the second heat flux sensor 10b are electrically connected to the control device 3 while being connected in series with each other. Thereby, a sensor signal obtained by combining the first sensor signal and the second sensor signal can be output from the sensor unit 2 to the control device 3. For this reason, the calculation of the sum of the first sensor signal and the second sensor signal in the control device 3 can be omitted. That is, the arithmetic processing of the control device 3 can be simplified.
- the sensor unit 2 may have a configuration without the radiator 12.
- the surface temperature of the second heat flux sensor 10b changes instantaneously due to, for example, wind hitting the surface of the second heat flux sensor 10b. This affects the heat flux passing through the sensor unit 2. For this reason, the detection accuracy of the heat flux of the sensor part 2 will fall.
- the sensor unit 2 of the present embodiment includes a radiator 12 having a predetermined heat capacity.
- the heat capacity of the heat radiating body 12 is made larger than the heat capacity of the heat buffer 11.
- the assembled state diagnosis device 1 As shown in FIG. 9, the assembled state diagnosis device 1 according to the present embodiment diagnoses the assembled state of the transfer device 300.
- the transfer device 300 includes a ball screw 301, a support member 302, a motor 303, a pedestal 304, a rail 305, and a guide block 306.
- the support member 302 is omitted for easy understanding.
- the ball screw 301 is a machine element component that converts rotational motion into linear motion.
- the ball screw 301 includes a screw shaft 311, a nut 312, and a ball 313.
- a ball 313 is inserted between the screw shaft 311 and the nut 312.
- the support member 302 supports both ends of the screw shaft 311 in the axial direction.
- the motor 303 is a power source that rotates the screw shaft 311.
- the pedestal 304 is for mounting a device or the like to be transferred.
- the pedestal 304 has a planar rectangular shape whose longitudinal direction is a direction orthogonal to the axial direction of the screw shaft 311 (that is, the vertical direction in FIG. 9).
- the pedestal 304 is connected to the nut 312 at a substantially central portion in the longitudinal direction. Both ends of the pedestal 304 in the longitudinal direction are connected to the guide block 306.
- the rail 305 is a linear member. Two rails 305 are used, and are fixed to a base plate 307 as shown in FIG.
- the guide block 306 is engaged with the rail 305.
- the guide block 306 is a guide member that moves along the rail 305. When the guide block 306 moves on the rail 305, the rail 305 and the guide block 306 rub against each other. A portion of the rail 305 that rubs against the guide block 306 is a sliding portion. Accordingly, in the present embodiment, the two rails 305 constitute an assembly part having a sliding portion.
- the components of the transfer device 300 such as the rail 305 and the guide block 306 described above are assembled as shown in FIGS. At this time, the two rails 305 are installed in parallel.
- the configuration of the diagnostic device 1 of the present embodiment is the same as that of the diagnostic device 1 of the first embodiment.
- the sensor unit 2 is attached to the surface of the guide block 306 of the transfer device 300.
- the sensor unit 2 includes a first heat flux sensor 10a, a heat buffer 11, a second heat flux sensor 10b, and a radiator 12 from the side closer to the guide block 306 toward the side away from the guide block 306. Arranged in order.
- the control device 3 diagnoses whether or not the assembled state of the two rails 305 is appropriate.
- the assembled state of the two rails 305 here is an installed state of the two rails 305.
- the control device 3 diagnoses whether or not the installation state of the two rails 305 is appropriate, that is, whether the parallelism of the two rails 305 is good or bad.
- the transfer device 300 repeats an operation cycle in which the travel and stop of the pedestal 304 are one cycle. While the pedestal 304 is traveling, the output value of the sensor unit 2 increases due to friction between the sliding portion of the rail 305 and the sliding portion of the guide block 306. While the pedestal 304 is stopped, the output value of the sensor unit 2 decreases.
- the waveform indicating the change in the output value of the sensor unit 2 over time when the two rails 305 are in a parallel state is in line with the operation cycle of the transfer device 300 as shown in FIG.
- the waveform increases and decreases regularly.
- a portion that is not locally parallel to the two rails 305 may occur due to the fact that at least a part of the two rails 305 is wavy or floating.
- the waveform indicating the change in the output value of the sensor unit 2 with the passage of time when the parallelism is poor has a larger output peak value than when the parallelism is good. It becomes a waveform.
- the output value of the sensor unit 2 differs between when the parallelism of the two rails 305 is good and when it is bad. Therefore, a threshold value for discriminating between the state where the parallelism of the two rails 305 is good and the state where it is bad is set in advance, and the output value of the sensor unit 2 is compared with the threshold value. Thereby, it can be determined whether the assembled state of the two rails 305 is appropriate.
- the control device 3 diagnoses the assembled state based on the detection result of the sensor unit 2 as in the first embodiment. Specifically, the control device 3 compares the detection value of the sensor unit 2 with a threshold value. When the detected value does not exceed the threshold value as indicated by the wavy line in FIG. 12, the control device 3 determines that the assembled state is appropriate. On the other hand, as shown by the solid line in FIG. 12, when the detected value exceeds the threshold value, the control device 3 determines that the assembled state is not appropriate. Thus, according to the diagnostic apparatus 1 of this embodiment, it can be diagnosed whether the assembly state of the two rails 305 is appropriate.
- the sensor unit 2 used in the diagnostic device 1 of the present embodiment has the same configuration as the sensor unit 2 of the first embodiment. For this reason, also in the diagnostic apparatus 1 of this embodiment, there exists an effect similar to the diagnostic apparatus 1 of 1st Embodiment.
- the sensor unit 2 of the present embodiment has a flat heat receiving body 16.
- the heat receiving body 16 is disposed closer to the housing 203 than the first heat flux sensor 10a, that is, on the bearing 202 side. Therefore, the heat receiving body 16 is disposed between the bearing 202 and the first heat flux sensor 10a.
- the heat receiving body 16 has a predetermined heat capacity like the heat buffer 11 and the heat radiating body 12.
- the heat receiving body 16 is made of a metal material or a resin material. The material and thickness of the heat receiving body 16 are set so that the heat capacity thereof is smaller than that of the heat buffer 11 and the heat radiating body 12.
- the planar shape of the heat receiving body 16 is the same as the planar shape and shape of the first heat flux sensor 10a. The planar shape of the heat receiving body 16 may be different from the planar shape and shape of the first heat flux sensor 10a.
- the heat capacity of the heat receiving body 16 is set small. For this reason, the sensor part 2 of this embodiment can detect the heat flux change by rotation and the stop of the rotating shaft 201 which is a detection purpose. That is, in the sensor unit 2 of the present embodiment, the heat capacity of the heat receiving body 16 is set to a size that can detect a change in heat flux due to the rotation and stop of the rotating shaft 201.
- the diagnostic device 1 of the present embodiment can perform a diagnosis with high accuracy as to whether or not the preload state of the bearing 202 is appropriate.
- the sensor unit 2 may have the heat receiving body 16. Thereby, there exists an effect similar to this embodiment.
- the first and second heat flux sensors 10a and 10b are connected via a bent shape portion 10c having a bent shape. Similar to the first and second heat flux sensors 10a and 10b, the bent shape portion 10c has a structure in which an insulating base material 100, a surface protection member 110, and a back surface protection member 120 are laminated. Thus, the sensor unit 2 of the present embodiment is integrated with the first and second heat flux sensors 10a and 10b.
- the sensor unit 2 of the present embodiment has a structure in which one heat flux sensor 10 is bent so as to sandwich the thermal buffer 11.
- the insulating base material 100, the surface protection member 110, and the back surface protection member 120 are each made of a flexible resin material. For this reason, the heat flux sensor 10 can be bent easily. Thereby, the structure by which the thermal buffer 11 is arrange
- the back surface conductor patterns 121 are connected to each other.
- the first and second heat flux sensors 10 a and 10 b are electrically connected not by the external wiring 151 but by a wiring pattern inside the heat flux sensor 10.
- mutual mutual surface conductor patterns 111 may be connected.
- the first and second heat flux sensors 10a and 10b are constituted by one heat flux sensor 10, and the external wiring for connecting the first heat flux sensor 10a and the second heat flux sensor 10b. 151 can be eliminated. Therefore, the number of parts can be reduced.
- the diagnosis device 1 according to the first embodiment uses the assembled state of the bearing 202 as a diagnosis target.
- the diagnostic device 1 according to the second embodiment uses the assembled state of the two rails 305 as a diagnosis target.
- the diagnosis target of the diagnostic apparatus 1 is not limited to these.
- the diagnostic apparatus 1 can set the assembled state of other assembled parts as a diagnosis target. However, in the other assembled parts, the magnitude of the heat flux from the sliding portion differs depending on whether the assembled state is appropriate or inappropriate.
- the first heat flux sensor 10a and the second heat flux sensor 10b are electrically connected to the control device 3 in a state where they are connected in series.
- the controller 3 may be connected in parallel.
- the first heat flux sensor 10a and the second heat flux sensor are output so as to output the first sensor signal and the second sensor signal having opposite polarities.
- 10b was arrange
- the first heat flux sensor 10a and the second heat flux sensor 10b may be arranged so as to output the first sensor signal and the second sensor signal having the same polarity.
- the first heat flux sensor 10 a and the second heat flux sensor 10 b are connected in parallel to the control device 3.
- the control device 3 calculates the difference between the first sensor signal and the second sensor signal. Thereby, diagnosis control can be performed similarly to the first and second embodiments.
- the insulating base material 100, the surface protection member 110, and the back surface protection member 120 of the heat flux sensor 10 are made of a flexible insulating material other than a resin material. It may be configured. Furthermore, the insulating base material 100, the surface protection member 110, and the back surface protection member 120 may be made of an insulating material having no flexibility. Further, the heat flux sensor 10 may have a structure without the front surface protection member 110 and the back surface protection member 120. Further, as the heat flux sensor 10, a sensor having a configuration different from the above configuration may be used.
- the insulating base material 100, the surface protection member 110, and the back surface protection member 120 of the heat flux sensor 10 are made of an insulating material having flexibility other than the resin material. May be.
- the heat flux sensor 10 may have a structure without the front surface protection member 110 and the back surface protection member 120.
- the first heat flux sensor 10 a and the second heat flux sensor 10 b are connected via a bent portion 10 c formed of the insulating base material 100.
- the bent shape portion 10 c only needs to be configured to include the same insulating material as that of the insulating base material 100.
- the sensor unit 2 of each of the above embodiments includes the two heat flux sensors 10, the thermal buffer 11, and the radiator 12, the radiator 12 may not be provided. In this case, the sensor unit 2 is fixed by using another fixing member or an adhesive.
- the voltage is used as the sensor signal of the sensor unit 2, but a current may be used.
- the diagnostic apparatus of an assembly state is provided with a sensor part and a determination part.
- a sensor part detects the heat flux which flows toward the exterior from a sliding part.
- the determination unit determines whether or not the assembled state of the assembled component is appropriate based on the detection result detected by the sensor unit.
- the sensor unit includes a first heat flux sensor, a second heat flux sensor, and a thermal buffer disposed between the first heat flux sensor and the second heat flux sensor.
- the first heat flux sensor outputs a first sensor signal corresponding to the heat flux passing through the first heat flux sensor.
- the second heat flux sensor outputs a second sensor signal corresponding to the heat flux passing through the second heat flux sensor.
- the determination unit determines whether there is an abnormality in the target device based on the first sensor signal and the second sensor signal.
- the sensor unit includes a thermal buffer disposed between the first heat flux sensor and the second heat flux sensor. For this reason, when the heat flux emitted from the sliding portion changes, the heat flux passing through the second heat flux sensor changes more slowly with a delay than the heat flux passing through the first heat flux sensor. Therefore, a change in the heat flux emitted from the sliding portion can be detected from the difference between the first sensor signal and the second sensor signal.
- the first heat flux sensor and the second heat flux sensor are arranged on both sides of the thermal buffer, and both are arranged at relatively close positions.
- a change in environmental temperature which is the temperature of the environment in which the sensor unit is installed, usually occurs gradually over a long period of time. For this reason, the influence which a 1st heat flux sensor and a 2nd heat flux sensor receive from environmental temperature is the same or close to the same.
- Each of the first heat flux sensor and the second heat flux sensor outputs a sensor signal corresponding to the heat flux affected by the same or similar environmental temperature. Therefore, by using both sensor signals, the influence of the environmental temperature on the detection result of the sensor unit can be excluded or reduced.
- the diagnostic device of the second aspect it is possible to diagnose the assembled state of the assembled component with high accuracy.
- the sensor unit is disposed on a side farther from the assembly component than the second heat flux sensor, and has a heat radiator having a predetermined heat capacity.
- the heat capacity of the heat radiating body is made larger than the heat capacity of the heat buffer. According to this, even when a large amount of heat is released from the sliding portion, heat can be flowed from the sliding portion toward the heat radiating body. For this reason, it is possible to suppress heat from being trapped inside the sensor unit.
- the sensor unit has a heat receiving body arranged closer to the assembly component than the first heat flux sensor.
- the heat capacity of the heat receiving body is smaller than the heat capacity of the heat buffer.
- the sensor unit when the heat flux from the sliding portion sequentially passes through the first heat flux sensor and the second heat flux sensor, the sensor unit is configured to output the first sensor signal and the second sensor signal.
- the first heat flux sensor and the second heat flux sensor are arranged so that the polarities are opposite.
- the first heat flux sensor and the second heat flux sensor are electrically connected in series.
- the sensor unit can output a sensor signal obtained by combining the first sensor signal and the second sensor signal. For this reason, the calculation process of the sum of a 1st sensor signal and a 2nd sensor signal can be made unnecessary.
- each of the first heat flux sensor and the second heat flux sensor includes a flexible film-like insulating base, a plurality of first thermoelectric members, and a plurality of second heat flux sensors. And a thermoelectric member.
- the first thermoelectric members and the second thermoelectric members are alternately connected in series.
- the first heat flux sensor and the second heat flux sensor are connected via a bent portion that includes an insulating material.
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Combustion & Propulsion (AREA)
- Measuring Temperature Or Quantity Of Heat (AREA)
- Testing Of Devices, Machine Parts, Or Other Structures Thereof (AREA)
- Investigating Or Analyzing Materials Using Thermal Means (AREA)
Abstract
Description
図1に示すように、本実施形態における組付状態の診断装置1は、回転軸の支持機構200の組付状態を診断する。
図9に示すように、本実施形態における組付状態の診断装置1は、移送装置300の組付状態を診断する。
本実施形態は、第1実施形態に対して、センサ部2の構成を変更したものである。診断装置1のその他の構成は第1実施形態と同じである。
本実施形態は、第1実施形態に対して、センサ部2の構成を変更したものである。診断装置1のその他の構成は第1実施形態と同じである。
本発明は上記した実施形態に限定されるものではなく、下記のように、特許請求の範囲に記載した範囲内において適宜変更が可能である。
(まとめ)
上記各実施形態の一部または全部で示された第1の観点によれば、組付状態の診断装置は、センサ部と、判定部とを備える。センサ部は、摺動部から外部に向かって流れる熱流束を検出する。判定部は、センサ部が検出した検出結果に基づいて、組付部品の組付状態が適正か否かを判定する。
2 センサ部
3 制御装置
10a 第1熱流束センサ
10b 第2熱流束センサ
11 熱緩衝体
12 放熱体
16 受熱体
202 軸受
305 レール
Claims (7)
- 摺動部を有する組付部品(202、305)の組付状態を診断する組付状態の診断装置であって、
前記摺動部から外部に向かって流れる熱流束を検出するセンサ部(2)と、
前記センサ部が検出した検出結果に基づいて、前記組付部品の組付状態が適正か否かを判定する判定部(3)とを備える組付状態の診断装置。 - 前記センサ部は、
第1熱流束センサ(10a)と、
前記第1熱流束センサよりも前記組付部品から離れた側に配置された第2熱流束センサ(10b)と、
前記第1熱流束センサと前記第2熱流束センサの間に配置され、所定の熱容量を有する熱緩衝体(11)とを有し、
前記第1熱流束センサは、前記組付部品側から前記熱緩衝体側に向かって前記第1熱流束センサを通過する熱流束に応じた第1センサ信号を出力し、
前記第2熱流束センサは、前記熱緩衝体側から前記熱緩衝体側の反対側に向かって前記第2熱流束センサを通過する熱流束に応じた第2センサ信号を出力し、
前記判定部は、前記第1センサ信号と前記第2センサ信号に基づいて、前記組付部品の組付状態が適正か否かを判定する請求項1に記載の組付状態の診断装置。 - 前記センサ部は、前記第2熱流束センサよりも前記組付部品から離れた側に配置され、所定の熱容量を有する放熱体(12)を有する請求項2に記載の組付状態の診断装置。
- 前記放熱体の熱容量は、前記熱緩衝体の熱容量よりも大きくされている請求項3に記載の組付状態の診断装置。
- 前記センサ部は、前記第1熱流束センサよりも前記組付部品側に配置された受熱体(16)を有し、
前記受熱体の熱容量は、前記熱緩衝体の熱容量よりも小さくされている請求項2ないし4のいずれか1つに記載の組付状態の診断装置。 - 前記センサ部は、前記摺動部からの熱流束が前記第1熱流束センサと前記第2熱流束センサを順に通過したときに、前記第1センサ信号と前記第2センサ信号の極性が反対となるように、前記第1熱流束センサと前記第2熱流束センサとが配置されており、
前記第1熱流束センサと前記第2熱流束センサは、電気的に直列に接続されている請求項2ないし5のいずれか1つに記載の組付状態の診断装置。 - 前記第1熱流束センサと前記第2熱流束センサのそれぞれは、
少なくとも絶縁材料で構成され、可撓性を有するフィルム状の絶縁基材(100)と、
前記絶縁基材に形成され、熱電材料で構成された複数の第1熱電部材(130)と、
前記絶縁基材に形成され、前記第1熱電部材と異なる熱電材料で構成された複数の第2熱電部材(140)とを有し、
前記複数の第1熱電部材と複数の前記第2熱電部材は、前記第1熱電部材と前記第2熱電部材とが交互に直列に接続されており、
前記第1熱流束センサと前記第2熱流束センサは、前記絶縁材料を含んで構成された屈曲形状部(10c)を介して、つながっている請求項6に記載の組付状態の診断装置。
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EP16864259.3A EP3376197A4 (en) | 2015-11-12 | 2016-11-09 | Assembly state diagnostic device |
US15/775,729 US10845256B2 (en) | 2015-11-12 | 2016-11-09 | Diagnosis apparatus of assembly state |
KR1020187013436A KR102131855B1 (ko) | 2015-11-12 | 2016-11-09 | 조립 상태의 진단 장치 |
EP20170407.9A EP3734250A1 (en) | 2015-11-12 | 2016-11-09 | Diagnosis apparatus of assembly state |
CN201680065852.6A CN108291855B (zh) | 2015-11-12 | 2016-11-09 | 组装状态的诊断装置 |
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WO2019003696A1 (ja) * | 2017-06-27 | 2019-01-03 | 株式会社デンソー | 位置検出装置 |
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JP6358234B2 (ja) | 2015-11-12 | 2018-07-18 | 株式会社デンソー | 稼働状態の診断装置 |
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JP6950427B2 (ja) * | 2017-10-03 | 2021-10-13 | 株式会社デンソー | 位置検出装置 |
WO2019159838A1 (ja) * | 2018-02-13 | 2019-08-22 | Ntn株式会社 | 軸受装置およびスピンドル装置 |
JP6967495B2 (ja) * | 2018-09-03 | 2021-11-17 | Ntn株式会社 | 軸受装置 |
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US10845256B2 (en) | 2020-11-24 |
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