WO2017057069A1 - 異常兆候診断装置 - Google Patents
異常兆候診断装置 Download PDFInfo
- Publication number
- WO2017057069A1 WO2017057069A1 PCT/JP2016/077491 JP2016077491W WO2017057069A1 WO 2017057069 A1 WO2017057069 A1 WO 2017057069A1 JP 2016077491 W JP2016077491 W JP 2016077491W WO 2017057069 A1 WO2017057069 A1 WO 2017057069A1
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- WIPO (PCT)
- Prior art keywords
- heat flux
- state
- elastic body
- flux sensor
- value
- 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
-
- 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
- F15B15/00—Fluid-actuated devices for displacing a member from one position to another; Gearing associated therewith
- F15B15/20—Other details, e.g. assembly with regulating devices
- F15B15/28—Means for indicating the position, e.g. end of stroke
- F15B15/2807—Position switches, i.e. means for sensing of discrete positions only, e.g. limit switches
-
- 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
- F15B15/00—Fluid-actuated devices for displacing a member from one position to another; Gearing associated therewith
- F15B15/20—Other details, e.g. assembly with regulating devices
- F15B15/28—Means for indicating the position, e.g. end of stroke
- F15B15/2815—Position sensing, i.e. means for continuous measurement of position, e.g. LVDT
-
- 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
-
- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
- G05B23/00—Testing or monitoring of control systems or parts thereof
- G05B23/02—Electric testing or monitoring
-
- 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
- F15B2211/00—Circuits for servomotor systems
- F15B2211/60—Circuit components or control therefor
- F15B2211/63—Electronic controllers
- F15B2211/6303—Electronic controllers using input signals
- F15B2211/6343—Electronic controllers using input signals representing a temperature
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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
- F15B2211/00—Circuits for servomotor systems
- F15B2211/80—Other types of control related to particular problems or conditions
- F15B2211/87—Detection of failures
Definitions
- the present invention relates to an abnormality sign diagnosis apparatus.
- Patent Document 1 As a heat flux sensor for detecting a heat flux, for example, there is one disclosed in Patent Document 1.
- maintenance of facilities includes preventive maintenance that performs maintenance such as repair, replacement, and renewal before an accident such as failure or destruction occurs.
- Equipment here includes devices, equipment, systems, and the like.
- time-based maintenance is generally performed. This is to perform maintenance such as replacement and repair in a certain period. This period is set based on the durability test data and the deterioration state of the actual machine that has been used for many years. In addition, this period is set shorter than the actual life of the equipment in consideration of the safety factor.
- the period set based on the durability test data acquired with another thing instead of the actual thing or the deterioration state of the actual machine used for many years is the same as the actual life of the equipment Often not. For this reason, maintenance is performed in a period shorter than the life expecting the safety factor. At this time, parts in a normal state may be discarded by replacement. Moreover, even if a period shorter than the lifetime is set in anticipation of the safety factor, component failure may occur earlier than that period. In this case, serious damage such as damage to other parts may occur. As described above, the time-based maintenance cannot always maintain the equipment at an appropriate time.
- state-based maintenance as preventive maintenance to solve this. This is to maintain the equipment when the state of the equipment is monitored and abnormal signs appearing before the failure occurs are detected. Abnormal signs are signs of failure or malfunction. Abnormal signs appear as fluctuations in current, voltage, sound (ie, air vibration), object vibration, and the like. According to this state-based maintenance, maintenance can be performed at an appropriate time.
- a dedicated sensor corresponding to the abnormal sign to be detected is required.
- a voltage sensor is required to detect voltage fluctuations.
- a vibration sensor is required to detect fluctuations in the vibration of the object. For this reason, the sensor to be used must be selected according to the abnormal sign to be detected.
- a plurality of types of abnormal signs to be detected a plurality of types of sensors must be used.
- the present invention has been made in view of the above points, and aims to provide an abnormality sign diagnostic apparatus capable of diagnosing the presence or absence of an abnormality sign of a measurement object using one type of sensor regardless of the kind of abnormality sign to be detected. To do.
- An abnormal sign diagnosis device that diagnoses the presence or absence of abnormal signs that appear before a measurement object failure occurs, and is generated from the measurement object continuously from the start of operation of the measurement object or at predetermined time intervals
- a heat flux sensor that detects the heat flux to be detected, and a determination unit that determines whether or not there is an abnormality sign based on the detection result of the heat flux sensor.
- heat flux is generated from at least one of current, voltage, sound, vibration, and friction from all or part of the facility.
- the present inventor has found that the heat flux generated from this equipment changes as abnormal signs occur in the equipment.
- the heat flux generated from the measurement object is detected continuously or at predetermined intervals. Based on the detection result, it is determined whether or not there is an abnormality sign. Thereby, irrespective of the kind of abnormality sign which should be detected, the presence or absence of the abnormality sign of a measurement object can be diagnosed using one type of sensor.
- FIG. 3 is a sectional view taken along line III-III in FIG. 2. It is an equivalent circuit of the battery of FIG. It is a flowchart which shows the diagnostic control of the preventive maintenance in 1st Embodiment. It is a figure which shows the time change of a heat flux when a battery is a normal state. It is a figure which shows the time change of a heat flux when a battery is a degradation state. It is a figure which shows the time change of a heat flux when a battery is in a failure state. It is a figure which shows the abnormal sign diagnostic apparatus and drilling machine in 2nd Embodiment.
- FIG. 27 is a side view of the driving unit showing a state of the driving belt during the first period in FIG. 26. It is a side view of the tensioner which shows the 1st mode at the time of the 1st period in FIG. It is a side view of the tensioner which shows the 2nd mode at the time of the 1st period in FIG. It is a figure which shows the time change of a heat flux in case each of a conveyance belt is in a normal state, a deterioration state, and a failure state.
- FIG. 36 is a cross-sectional view of the air cylinder in FIG. 35 during a period P21. It is sectional drawing of the air cylinder in FIG.
- FIG. 36 is a cross-sectional view of the air cylinder in FIG. 35 during a period P23.
- FIG. 36 is a cross-sectional view of the air cylinder in FIG. 35 during a period P23.
- An abnormality sign diagnosis apparatus 1 (hereinafter simply referred to as a diagnosis apparatus 1) of the present embodiment shown in FIG. 1 performs a preventive maintenance diagnosis of a battery 2 as a measurement object.
- the battery 2 is a lithium battery cell.
- the diagnostic device 1 includes a heat flux sensor 10, a control device 12, and a display device 14.
- the heat flux sensor 10 is for detecting the heat flux generated from the battery 2.
- the heat flux sensor 10 is installed on the surface of the battery 2.
- the heat flux sensor 10 has a flat plate shape. The internal structure of the heat flux sensor 10 will be described later.
- the heat flux sensor 10 outputs a sensor signal corresponding to the heat flux from the inside of the battery 2 toward the outside.
- the control device 12 performs diagnostic control for preventive maintenance of the battery 2. This diagnostic control is for diagnosing the presence or absence of abnormal signs based on the heat flux detected by the heat flux sensor 10.
- An abnormal sign means a sign that a failure or malfunction occurs. Abnormal signs appear when the equipment is in a deteriorated state before failure or malfunction.
- a heat flux sensor 10 is connected to the input side of the control device 12. A sensor signal from the heat flux sensor 10 is always input to the control device 12.
- the control device 12 constitutes a determination unit that determines whether there is an abnormality sign based on the detection result of the heat flux sensor 10.
- a display device 14 is connected to the output side of the control device 12.
- the control device 12 displays on the display device 14 that there is an abnormal sign or failure when there is an abnormal sign or failure.
- the control device 12 includes a microcomputer, a storage device, and the like.
- the display device 14 is a notification device for notifying the user that there is an abnormality sign or the like.
- a liquid crystal display or the like is used as the display device 14.
- the heat flux sensor 10 includes an insulating base 100, a front surface protection member 110, and a back surface protection member 120 that are integrated, and the first and second layers are integrated inside the integrated body.
- the connection 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.
- the first and second via holes are embedded with first and second interlayer connection members 130 and 140 made of different thermoelectric materials such as metals and semiconductors.
- the first conductive portions of the first and second interlayer connection members 130 and 140 are constituted by the surface conductor pattern 111 disposed on the surface 100 a of the insulating base material 100.
- the second connection portions of the first and second interlayer connection members 130 and 140 are constituted 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 interlayer connection members 130 and 140 by the Seebeck effect.
- the heat flux sensor 10 outputs this thermoelectromotive force (for example, voltage) as a sensor signal.
- the battery 2 has internal resistances R1 and R2.
- Vocv indicates an open circuit voltage
- ⁇ V indicates a voltage drop due to the internal resistances R 1 and R 2
- V operation indicates an actual voltage of the battery 2.
- the battery 2 generates heat due to the voltage applied to the internal resistors R1 and R2 and the current flowing through the internal resistors R1 and R2. For this reason, a heat flux is generated from the inside of the battery 2 toward the outside.
- the internal resistances R1 and R2 increase and the voltage drop ⁇ V increases. For this reason, compared with the case where the battery 2 is a normal state, the emitted-heat amount increases and a heat flux increases.
- the control device 12 diagnoses the presence or absence of an abnormal sign based on the measured heat flux.
- Each step in FIG. 5 constitutes a functional unit for realizing various functions. The same applies to the flowcharts of other drawings.
- the process shown in FIG. 5 is implemented after the battery 2 starts operation until it stops moving.
- the operation start and the operation stop of the battery 2 are determined by, for example, the operation start and stop of the electric device connected to the battery 2.
- step S11 the detection value of the heat flux sensor 10 is acquired.
- This detected value is a calculated value obtained by calculating the value of the heat flux from the value of the voltage input from the heat flux sensor 10. Note that the voltage value input from the heat flux sensor 10 may be used as the detection value.
- step S12 the detected value is compared with the standard to determine whether the detected value is within the standard.
- the standard has a predetermined upper limit value and lower limit value.
- the standard is a first reference range for determining whether or not the battery is in a normal state.
- a standard in which an upper limit value and a lower limit value are set based on a change tendency of heat flux generated from the battery 2 in a normal state with respect to an elapsed time from the start of operation of the battery 2 is used as a standard.
- step S12 YES is determined in step S12, and step S11 is performed again.
- NO is determined in step S12, and the process proceeds to step S13.
- step S12 is performed by comparing the detection value at a predetermined elapsed time with the standard at the same elapsed time. Further, as shown in FIG. 6, the determination in step S12 is performed by comparing a waveform drawn by a detection value from the start of operation of the battery 2 to a predetermined elapsed time with a line representing a standard until the same elapsed time. Also good. The same applies to the determination in step S13.
- the management width is a second reference range for determining whether or not the battery 2 is in a deteriorated state.
- the management width an upper limit value and a lower limit value are set so that the deterioration state and the failure state can be distinguished.
- the management width is set to be in a wider range than the standard while including the standard.
- the lower limit value of the management width is substantially the same as the lower limit value of the standard. As shown in FIG. 7, when the battery 2 is in a deteriorated state, if the elapsed time from the start of operation exceeds t1, the heat flux is out of the standard, but is within the management width.
- step S13 YES is determined in step S13, and the process proceeds to step S14.
- step S14 an abnormal sign is displayed on the display device 14. Thereby, necessary measures such as charging or replacement of the battery 2 are performed by the maintenance worker.
- step S15 the display device 14 displays a failure. Thereby, necessary measures such as replacement of the battery 2 are performed by the maintenance worker. In this way, the state reference maintenance of the battery 2 is performed.
- the heat flux generated from the battery 2 is continuously detected by the heat flux sensor 10 from the start to the stop of the battery 2. Based on the detection result, it is determined whether or not there is an abnormality sign. Thereby, the abnormality sign of the battery 2 can be detected without using a voltmeter and an ammeter. Therefore, it is possible to know an appropriate charging time and replacement time of the battery 2.
- the state reference maintenance of the battery 2 can be performed. If maintenance is performed after grasping an abnormality sign, the battery 2 can be used until the end of its life, so that no waste occurs. Further, even when the actual life is shorter than the predicted life, if the abnormal sign can be grasped, the battery 2 can be charged, replaced, etc. before the failure. In general, the failure rate of a product draws a so-called bathtub curve having an initial failure, a stable period, and an aging period. Since the abnormality sign can be grasped by the heat flux measurement, the battery 2 can be maintained at an appropriate time.
- the diagnostic apparatus 1 of this embodiment shown in FIG. 9 performs preventive maintenance diagnosis of the drill 31 of the drilling machine 3 as a measurement object.
- the drilling machine 3 is a processing device for making a hole in a workpiece.
- the drilling machine 3 includes a drill 31 that is rotated by a motor (not shown).
- the drill 31 is a cutting tool used for cutting.
- a workpiece 32 is placed under the drill 31. Examples of the workpiece 32 include a metal block.
- the user operates the handle 33 downward. Thereby, the drill 31 in a rotated state moves downward while processing the workpiece 32. In this way, a drilling process is performed on the workpiece 32.
- Diagnostic device 1 has the same configuration as in the first embodiment.
- the heat flux sensor 10 is installed on the side surface of the workpiece 32.
- the control device 12 diagnoses the presence or absence of an abnormal sign based on the measured heat flux. Note that the process shown in FIG. 10 is performed from the start to the completion of drilling by the drill 31, that is, from the start to the stop of the drill 31.
- the control device 12 is configured to acquire operation position information of the handle 33. The start and completion of drilling is determined by the operating position of the handle 33.
- step S12 the detected value is compared with the standard to determine whether the detected value is within the standard.
- the standard is a first reference range for determining whether or not the blade of the drill 31 is in a normal state.
- step S12 if the blade is in a normal state, the detected value is within the standard. Therefore, if the detected value is within the standard, YES is determined in step S12, and step S11 is performed again. When the detected value is out of the standard, NO is determined in step S12, and the process proceeds to step S13.
- step S13 it is determined whether or not the detected value is within the management range.
- the management width is a second reference range for determining whether or not the blade of the drill 31 is in a deteriorated state.
- an upper limit value and a lower limit value are set so that the deterioration state and the failure state of the drill 31 can be distinguished.
- step S13 YES is determined in step S13, and the process proceeds to step S14.
- step S14 an abnormal sign is displayed on the display device 14. Thereby, necessary measures such as replacement of the drill 31 are performed by the maintenance worker.
- step S13 the rotation of the drill 31 is forcibly stopped. Thereby, the drill 31 is replaced by the maintenance worker. In this way, state-based maintenance of the drill 31 is performed.
- an abnormal sign of the drill 31 can be detected by using the heat flux sensor 10. Therefore, it is possible to know an appropriate replacement time for the drill 31.
- the diagnostic apparatus 1 of this embodiment can perform the same preventive maintenance diagnosis not only on the drill 31 but also on other cutting tools.
- the diagnostic device 1 of this embodiment shown in FIG. 14 performs preventive maintenance diagnosis of the fan filter unit 4 as a measurement object.
- the fan filter unit 4 is for purifying air.
- the fan filter unit 4 includes a filter 41, a fan 42, and a motor 43.
- the filter 41 is, for example, a HEPA (High Efficiency Particulate Air Filter) filter.
- HEPA High Efficiency Particulate Air Filter
- Diagnostic device 1 has the same configuration as in the first embodiment.
- the heat flux sensor 10 is installed on the surface of the motor 43.
- a sound is generated when air passes through the filter 41.
- a heat flux is generated from the filter 41 by this sound, that is, vibration of air. Therefore, the heat flux generated from the filter 41 is constantly measured by the heat flux sensor 10.
- the control device 12 diagnoses the presence or absence of an abnormal sign based on the measured heat flux as shown in the flowchart of FIG. Note that the process shown in FIG. 10 is performed from the start to the stop of the operation of the fan 42.
- step S12 shown in FIG. 10 it is determined whether or not the detected value is within the standard.
- the standard is a first reference range for determining whether or not the filter 41 is in a normal state.
- the normal state of the filter 41 is a state in which the amount of dust and dust attached to the filter 41 is small.
- the initial operation of the fan 42 is a period in which the rotational speed of the fan 42 gradually increases and the amount of air blown by the fan 42 continues to increase. Thereafter, the amount of air blown by the fan 42 becomes constant.
- step S12 determines whether the filter 41 is in a normal state. Therefore, if the detected value is within the standard. Therefore, if the detected value is within the standard, YES is determined in step S12, and step S11 is performed again. When the detected value is out of the standard, NO is determined in step S12, and the process proceeds to step S13.
- step S13 it is determined whether or not the detected value is within the management range.
- the management width is a second reference range for determining whether or not the filter 41 is in a deteriorated state.
- an upper limit value and a lower limit value are set so that the deterioration state and the failure state of the filter 41 can be distinguished.
- step S13 YES is determined in step S13, and the process proceeds to step S14.
- step S14 an abnormal sign is displayed on the display device 14. Thereby, necessary maintenance such as replacement of the filter 41 is performed by the maintenance worker.
- step S16 the rotation of the fan 42 is forcibly stopped. Thereby, necessary maintenance such as replacement of the filter 41 is performed by the maintenance worker. In this way, the state reference maintenance of the filter 41 is performed.
- the use of the heat flux sensor 10 can detect an abnormal sign of the filter 41 without using a sound measuring instrument.
- the diagnostic device 1 of this embodiment shown in FIG. 18 performs preventive maintenance diagnosis of the automatic door device 5 as a measurement object.
- the automatic door device 5 includes a door body 51 and a touch switch 52 for opening the door.
- the door body 51 slides in one direction along a guide rail (not shown) located on the lower side of the door body 51.
- the door main body 51 is fixed to a door hanger (not shown) located above the door main body 51. When the door hanger is moved by the driving device, the door body 51 moves.
- Diagnostic device 1 has the same configuration as in the first embodiment.
- a plurality of heat flux sensors 10 are installed on each of the upper and lower portions of the door body 51.
- FIG. 18 illustrates a state in which one heat flux sensor 10 is connected to the control device 12, but all of the plurality of heat flux sensors 10 are connected to the control device 12.
- a heat flux is generated by vibration when the door main body 51 slides and friction at a sliding portion such as a guide rail or a door hanger. Therefore, the heat flux generated from the upper and lower portions of the door main body 51 is constantly measured by the heat flux sensor 10. As shown in the flowchart of FIG. 19, the control device 12 diagnoses the presence or absence of an abnormal sign based on the measured heat flux. Note that the process shown in FIG. 19 is performed from the start to the stop of the opening / closing operation of the door body 51, that is, from the start to the stop of the operation.
- step S12 the detected value is compared with the value standard to determine whether or not the detected value is within the standard.
- the standard is a first reference range for determining whether or not the automatic door device 5 is in a normal state.
- FIG. 20 shows a change in heat flux from the start of movement of the door body 51 to the stop of movement when the door body 51 changes from the fully closed state to the fully opened state.
- the door body 51 moves slowly for a certain period immediately after the start of movement and for a certain period before stopping. For this reason, as shown in FIG. 20, the heat convergence increases after the movement starts, becomes constant, and then decreases.
- This deteriorated state is a state where dust or the like is present on the guide rail or a state where the lubricating oil of the door hanger is reduced.
- vibration and friction are large and the heat flux is large in a certain period immediately after the start of movement and in a certain period before stopping.
- This failure state is a state in which there is more dust on the guide rail than in the deteriorated state, or a state in which the door hanger has insufficient lubricating oil. In a failure state, vibration and friction are large and heat flux is large from the start to the stop of movement.
- step S12 determines whether the state is normal. Therefore, if the detected value is within the standard. Therefore, if the detected value is within the standard, YES is determined in step S12, and step S11 is performed again. When the detected value is out of the standard, NO is determined in step S12, and the process proceeds to step S13.
- step S13 it is determined whether or not the detected value is within the management range.
- the management width is a second reference range for determining whether or not the automatic door device 5 is in a deteriorated state.
- an upper limit value and a lower limit value are set so that the deterioration state and the failure state of the automatic door device 5 can be distinguished.
- step S13 YES is determined in step S13, and the process proceeds to step S14.
- step S14 an abnormal sign is displayed on the display device 14. As a result, the maintenance worker takes necessary measures such as removal of dust and replenishment of lubricating oil.
- step S15-1 the automatic door device 5 is forcibly stopped.
- step S15-2 the display device 14 is caused to display a failure. Thereby, a necessary treatment is performed by the maintenance worker. In this way, state-based maintenance of the automatic door device 5 is performed.
- the use of the heat flux sensor 10 can detect an abnormal sign of the automatic door device 5 without using a vibration meter.
- the diagnostic apparatus 1 of this embodiment shown in FIG. 23 performs preventive maintenance diagnosis of the conveying belt 61 of the belt conveyor 60 shown in FIG. 24 as a measurement object.
- the belt conveyor 60 is a transport device that rotates a transport belt 61 in a ring shape on a plurality of rollers 62, and moves the transported object M1 thereon.
- the belt conveyor 60 includes a conveyance belt 61, a roller 62, a drive unit 63, and a stopper 64.
- the drive unit 63 is a drive unit that rotates the roller 62. When the driving unit 63 rotates the roller 62, the conveying belt 61 moves.
- the stopper 64 is a member that stops the conveyed product M1 at a predetermined stop position.
- the drive unit 63 includes a drive belt 631, a motor 632, and a tensioner 65.
- the driving belt 631 transmits the power of the motor 632 to the roller 62.
- the driving belt 631 is hung on both the passive pulley 633 provided on the roller 62 rotated by the driving unit 63 and the driving pulley 635 provided on the driving shaft 634 of the motor 632.
- the tensioner 65 applies tension to the driving belt 631.
- the tensioner 65 includes a tensioner roller 651, a roller receiving plate 652, a hinge 653, a mounting stay 654, an elastic body 655, and an elastic body holding plate 656.
- the tensioner roller 651 is a contact portion that comes into contact with the driving belt 631.
- the tensioner roller 651 is held at the tip of the roller receiving plate 652.
- the roller receiving plate 652 is supported by the mounting stay 654 via a hinge 653.
- the elastic body 655 is disposed on the opposite side of the roller receiving plate 652 from the tensioner roller 651 side.
- the elastic body 655 is in contact with the roller receiving plate 652.
- the elastic body 655 applies tension to the driving belt 631 via the roller receiving plate 652 and the tensioner roller 651.
- the elastic body 655 is deformed in accordance with a change in the tension of the driving belt 631.
- the elastic body 655 is made of a synthetic rubber such as urethane rubber.
- the elastic body holding plate 656 holds the elastic body 655.
- the elastic body holding plate 656 is supported by the mounting stay 654.
- the mounting stay 654 is fixed to the main body of the drive unit 63 by bolts 657.
- the heat flux sensor 10 is installed between the elastic body 655 and the elastic body holding plate 656.
- the diagnostic device 1 has the same configuration as that of the first embodiment.
- a heat flux is generated by deformation of the elastic body 655 that occurs when the belt conveyor 60 is operated. Therefore, the diagnostic device 1 constantly measures the heat flux generated from the elastic body 655 by the heat flux sensor 10.
- the transport process is a process in which the belt conveyor 60 in a stopped state starts operating, transports the transported object M1 on the transport belt 61 from the initial position to a predetermined stop position, and the belt conveyor 60 stops operating. . Therefore, the conveyance process is a process from the start of driving of the motor 632 to the stop of the motor 632.
- the first period P11 is a predetermined period immediately after the start of driving of the motor 632.
- the transported object M1 is on the transport belt 61 that is stopped.
- the driving pulley 635 starts to rotate.
- the passive pulley 633 does not rotate suddenly due to the inertia of the conveyed product M1 on the conveying belt 61.
- the driving belt 631 changes from a state indicated by a broken line to a stretched state indicated by a solid line.
- the tensioner roller 651 is pushed downward. Thereby, the elastic body 655 is compressed and dissipated.
- the passive pulley 633 starts to rotate, the elastic body 655 is restored as shown in FIG. As a result, the tensioner roller 651 returns upward. At this time, the elastic body 655 absorbs heat.
- the heat flux increases until the conveyed product M1 starts to move.
- the heat flux decreases.
- the second period P12 is a period during which the conveyed product M1 moves together with the conveying belt 61.
- the tension of the driving belt 631 changes at the timing when the teeth of the driving belt 631 are engaged with or separated from the teeth of the passive pulley 633 and the driving pulley 635.
- the tensioner roller 651 moves up and down in accordance with this change.
- compression and decompression of the elastic body 655 occur alternately.
- a vibration waveform of the heat flux is generated as shown in FIG.
- the third period P13 is a predetermined period immediately after the conveyed product M1 reaches a predetermined stop position.
- the conveyed product M1 hits the stopper 64 and stops while the conveying belt 61 continues to move.
- the force which tries to stop the passive pulley 633 acts by friction with the belt 61 for conveyance and the conveyed product M1. Therefore, as in the first period P11, the driving belt 631 is stretched. For this reason, as shown in FIG. 28, the tensioner roller 651 is pushed downward. Thereby, the elastic body 655 is compressed and dissipated.
- This deteriorated state is a state in which the surface of the conveyor belt 61 is worn or a state in which the conveyor belt 61 is extended as compared with the initial state of the conveyor belt 61.
- the surface of the conveyor belt 61 is worn.
- the frictional force between the conveying belt 61 and the conveyed product M1 decreases, and slipping occurs between them. If the slippage is large, it takes time for the conveyance, and the cycle time of the conveyance process is extended.
- the conveying belt 61 is moved by the rotation of the roller 62 due to friction with the roller 62 due to tension.
- the transport belt 61 When the transport belt 61 is used, it gradually extends.
- the conveyance belt 61 When the conveyance belt 61 is extended, the tension of the conveyance belt 61 is reduced and the frictional force with the roller 62 is decreased. For this reason, slip occurs between the conveying belt 61 and the roller 62.
- This failure state is a state where the transport belt 61 and the transported object M1 are completely slid, or a state where the transport belt 61 and the roller 62 are completely slid.
- the change in the heat flux detected in the first period P11 and the third period P13 has the same vibration waveform as in the second period P12.
- the control device 12 sets the first threshold value qt1 set so as to be able to discriminate between the normal state of the transport belt 61 and the other states, the deterioration state of the transport belt 61, and the failure.
- a second threshold value qt2 set so that the state can be discriminated is used.
- the second threshold value qt2 is set to a value smaller than the first threshold value qt1.
- the control apparatus 12 compares the detection value of the heat flux sensor 10, and these. Thereby, it can be detected whether the conveyance belt 61 is in a normal state, a deteriorated state, or a failure state.
- the control device 12 diagnoses the presence or absence of an abnormal sign based on the measured heat flux.
- the process shown in FIG. 31 is performed from the start to the stop of driving of the motor 632.
- step S11 the detected value qx of the heat flux sensor 10 is acquired.
- step S22 the detection value qx and the first threshold value qt1 are compared to determine whether or not the detection value qx is equal to or greater than the first threshold value qt1.
- the detection value in the first period P11 or the third period P13 is used.
- the detection value qx is equal to or greater than the first threshold value qt1.
- a YES determination is made in step S22, and the flow shown in FIG. 31 ends.
- step S11 is performed again.
- NO is determined in step S22, and the process proceeds to step S23.
- step S23 it is determined whether or not the detection value qx is equal to or greater than the second threshold value qt2. As shown in FIG. 30, if the transport belt 61 is in a deteriorated state, the detection value qx is equal to or greater than the second threshold value qt2. For this reason, when the detected value qx is equal to or greater than the second threshold value qt2, a YES determination is made in step S23, and the process proceeds to step S14. In step S14, an abnormal sign is displayed on the display device 14. Thus, necessary maintenance such as replacement of the transport belt 61 is performed by the maintenance worker.
- step S15-1 the belt conveyor 60 is forcibly stopped.
- step S15-2 the display device 14 is caused to display a failure. Thereby, a necessary treatment is performed by the maintenance worker.
- an abnormality sign of the belt conveyor 60 can be detected by using the heat flux sensor 10.
- the diagnostic apparatus 1 of this embodiment shown in FIG. 32 performs preventive maintenance diagnosis of the stopper 64 of the belt conveyor 60 shown in FIG. 24 as a measurement object.
- the stopper 64 includes an elastic body 641, a receiving plate 642, and a mounting block 643.
- the elastic body 641 is a buffer member.
- the receiving plate 642 is a member to which the flowing conveyed object M1 directly hits.
- the receiving plate 642 is a protective member for preventing the elastic body 641 from being damaged.
- the attachment block 643 is fixed to a structure (not shown) of the belt conveyor 60.
- the heat flux sensor 10 is disposed between the elastic body 641 and the mounting block 643.
- a protective plate 644 is installed between the heat flux sensor 10 and the elastic body 641.
- the protective plate 644 is a member for preventing the heat flux sensor 10 from being damaged by the deformation of the elastic body 641 when the heat flux sensor 10 is directly attached to the elastic body 641.
- the elastic body 641 is made of, for example, urethane rubber.
- Each of the receiving plate 642, the mounting block 643, and the protection plate 644 is made of a metal such as stainless steel or aluminum. Adjacent members are joined by an adhesive or an adhesive.
- the conveyed product M1 on the conveying belt 61 flows toward the stopper 64.
- the conveyed product M1 stops by hitting the stopper 64.
- the conveyed product M1 comes into contact with the surface of the receiving plate 642.
- the conveyed product M1 deforms the elastic body 641 so as to be crushed from the state indicated by the broken line in FIG. 33 to the state indicated by the solid line.
- heat is generated.
- the generated heat passes through the protection plate 644 and the heat flux sensor 10 and flows to the mounting block 643 as indicated by arrows in FIG.
- the heat flux sensor 10 detects the heat flux of heat released from the elastic body 641.
- the elastic body 641 becomes hard due to deterioration due to oxidation of rubber. Further, the elastic body 641 is fatigued or cracked by repeated deformation, and eventually is damaged. When such deterioration or fatigue occurs, the elastic body 641 becomes difficult to elastically deform, and kinetic energy cannot be converted into heat. Therefore, when the elastic body 641 of the stopper 64 is in a deteriorated state, as shown in FIG. 34, the peak of the heat flux waveform when the conveyed product M1 collides with the stopper 64 is smaller than that in the normal state.
- the elastic body 641 breaks and enters a failure state. In this fault state, as shown in FIG. 34, the peak of the heat flux waveform is hardly seen.
- the first threshold value qt3 is set so that the normal state of the elastic body 641 and the other state can be discriminated.
- the second threshold value qt4 is set so that the deterioration state and the failure state of the elastic body 641 can be discriminated.
- the second threshold value qt4 is set to a value smaller than the first threshold value qt3.
- the control apparatus 12 performs the preventive maintenance diagnosis of the elastic body 641 like the flowchart shown in FIG. 31 similarly to 5th Embodiment using the 1st threshold value qt3 and the 2nd threshold value qt4.
- the first threshold value qt1 and the second threshold value qt2 in FIG. 31 are read as the first threshold value qt3 and the second threshold value qt4, respectively. Thereby, it can be detected whether the elastic body 641 is in a normal state, a deteriorated state, or a failure state.
- the diagnostic device 1 of this embodiment shown in FIG. 35 performs preventive maintenance diagnosis of the seal members 241 and 227 of the air cylinder 20 as a measurement object.
- the air cylinder 20 is used for transporting the transported object M1.
- the air cylinder 20 is a power cylinder that reciprocates the piston 24 using air pressure as power.
- the air cylinder 20 includes a cylinder 22, a piston 24, and a piston rod 26.
- the cylinder 22, the piston 24, and the piston rod 26 are made of metal.
- the cylinder 22 is a housing having a cylindrical internal space (that is, a room) 221. For this reason, the cylinder 22 is also called a cylinder housing.
- the chamber 221 is divided into two chambers, a first chamber 222 and a second chamber 223, by the piston 24.
- the first chamber 222 is a chamber on the opposite side of the piston 24 from the piston rod 26 side.
- the second chamber 223 is a chamber on the piston rod 26 side of the piston 24.
- a first opening 224 communicating with the first chamber 222 is formed in the cylinder 22.
- a second opening 225 that communicates with the second chamber 223 is formed in the cylinder 22.
- the piston 24 is disposed inside the room 221.
- a rubber seal member 241 is attached to the side surface of the piston 24.
- a seal member 241 seals between the piston 24 and the cylinder 22.
- the piston 24 slides against the inner surface of the cylinder 22 by the seal member 241.
- the piston rod 26 is a shaft member that interlocks with the piston 24.
- the cylinder 22 has a third opening 226 formed therein.
- the piston rod 26 passes through the third opening 226.
- a rubber seal member 227 is attached to an inner wall surface constituting the third opening 226.
- a seal member 227 seals between the piston rod 26 and the cylinder 22.
- the piston rod 26 slides with respect to the inner surface of the cylinder 22 by the seal member 227.
- a flow path switching valve (not shown) is connected to the first opening 224 and the second opening 225 of the cylinder 22.
- the flow path switching valve switches the connection between an air supply flow path and an air discharge flow path (not shown) for each of the first opening 224 and the second opening 225.
- the air supply flow path is connected to an air compressor (not shown) that is a supply source of compressed air.
- the air discharge channel is open to the atmosphere. While the compressed air is supplied to the first chamber 222 by the flow path switching valve, the second chamber 223 is opened to the atmosphere, the first chamber 222 is opened to the atmosphere, and the second chamber 223 is opened. The second state in which the compressed air is supplied to is switched.
- the diagnostic device 1 includes a heat flux sensor 10, a control device 12, and a display device 14.
- the heat flux sensor 10 detects a heat flux between the inside and the outside of the cylinder 22.
- the heat flux sensor 10 is attached to the outer surface of the cylinder 22.
- the first heat flux sensor 10a and the second heat flux sensor 10b are used as the heat flux sensor 10.
- the first heat flux sensor 10 a is disposed in a portion of the outer surface of the cylinder 22 that is closest to the first chamber 222.
- the first heat flux sensor 10a detects a heat flux between the inside and the outside of the first chamber 222.
- the second heat flux sensor 10 b is disposed in a portion of the outer surface of the cylinder 22 that is closest to the second chamber 223.
- the second heat flux sensor 10b detects a heat flux between the inside and the outside of the second chamber 223.
- FIG. 36A to 36D show a case where the expansion / contraction direction of the air cylinder 20 (that is, the moving direction of the piston 24) is the left-right direction, and the air cylinder 20 changes from the contracted state to the extended state.
- the heat flux change in this case has a waveform shown in FIG.
- the horizontal axis in FIG. 37 represents the elapsed time from the start of the supply of compressed air to the air cylinder 20.
- shaft of FIG. 37 has shown the magnitude
- the heat flux from the inside of the room to the outside is the positive side.
- the heat flux from the outside to the inside of the room is the-side.
- periods P21, P22, P23, and P24 in FIG. 37 correspond to when the state of the air cylinder 20 is the state shown in FIGS. 36A, 36B, 36C, and 36D, respectively.
- the compressed air is supplied to the first chamber 222, and the second chamber 223 is opened to the atmosphere.
- the second chamber 223 is opened to the atmosphere from the state where the compressed air supplied when the second chamber 223 is contracted from the expanded state.
- the piston 24 does not start due to static friction of the seal members 241 and 227.
- the pressure in the first chamber 222 increases, the air in the first chamber 222 is compressed and heated. For this reason, the heat flux from the inside of the first chamber 222 toward the outside increases.
- the heat flux detected by the first heat flux sensor 10a increases on the + side.
- the second chamber 223 is depressurized by opening to the atmosphere, whereby the air in the first chamber 222 is expanded and cooled. For this reason, the heat flux from the outside toward the inside of the second chamber 223 increases.
- the heat flux detected by the second heat flux sensor 10b (hereinafter referred to as the second heat flux) becomes a negative value, and the absolute value increases on the minus side.
- the compressed air is supplied until the first chamber 222 reaches a predetermined pressure.
- the supply of compressed air is stopped.
- the heating of the air in the first chamber 222 is saturated, and the first heat flux gradually decreases and approaches zero.
- the second chamber 223 approaches the state of atmospheric pressure.
- the second heat flux gradually decreases and approaches zero.
- the heat flux changes with time due to the change in pressure of the gas.
- the first threshold values qt5 and qt6 are set so that the normal state of the seal members 241 and 227 and the other states can be discriminated.
- Second threshold values qt7 and qt8 are set so that the deterioration state and the failure state of the seal members 241 and 227 can be distinguished.
- the second threshold values qt7 and qt8 are set to values whose absolute values are smaller than those of the first threshold values qt5 and qt6.
- control apparatus 12 uses the detected value qx1 of the 1st heat flux sensor 10a, the 1st threshold value qt5, and the 2nd threshold value qt7, and the preventive maintenance diagnosis shown in the flowchart of FIG. 31 similarly to 5th Embodiment. I do.
- the detection value qx1 the detection value in the first period P21 or the third period P23 is used.
- the detection value qx, the first threshold value qt1, and the second threshold value qt2 in FIG. 31 are read as the detection value qx1, the first threshold value qt5, and the second threshold value qt7, respectively.
- control device 12 uses the detection value qx2 of the second heat flux sensor 10b and the first threshold value qt6 and the second threshold value qt8, as in the fifth embodiment, for the preventive maintenance diagnosis shown in the flowchart of FIG. I do.
- the detection value qx2 the detection value in the third period P23 is used.
- the detection value qx, the first threshold value qt1, and the second threshold value qt2 in FIG. 31 are read as the detection value qx2, the first threshold value qt6, and the second threshold value qt8, respectively.
- the preventive maintenance diagnosis may be performed using only one of the first heat flux sensor 10a and the second heat flux sensor 10b.
- the diagnostic device 1 of this embodiment shown in FIG. 39 performs a preventive maintenance diagnosis of the elastic body 743 of the chuck device 70 shown in FIG. 40 as a measurement object.
- the chuck device 70 is used for transporting the transported object M1.
- the chuck device 70 holds the conveyed product M1.
- the conveyed product M1 includes a gripped portion M1b protruding from the main body portion M1a.
- the gripped portion M1b is gripped.
- the chuck device 70 has a plurality of chuck claws 72 opened and closed by a chuck cylinder 71.
- the plurality of chuck claws 72 grip the conveyed product M1.
- the chuck claw 72 has a main body portion 73 that moves in the opening and closing direction of the chuck claw 72 and a tip end portion 74 that contacts the conveyed product M1.
- the distal end portion 74 is joined to the main body portion 73.
- the distal end portion 74 includes a mounting plate 741, a heat flux sensor 10, a protection plate 742, an elastic body 743, and a receiving plate 744 arranged in this order from the main body portion 73 side.
- the mounting plate 741 is attached to the main body 73.
- the attachment plate 741 is a member that attaches the elastic body 743 and the like to the main body 73.
- the heat flux sensor 10 is disposed between the mounting plate 741 and the protection plate 742.
- the heat flux sensor 10 is fixed to the elastic body 743 via a protective plate 742.
- the protective plate 742 is a member for preventing the heat flux sensor 10 from being damaged by deformation of the elastic body 743 when the heat flux sensor 10 is directly attached to the elastic body 743.
- the elastic body 743 is a buffer member.
- the elastic body 743 also has a role of gripping the conveyed product M1 by a spring force of elastic deformation.
- the elastic body 743 is made of urethane rubber.
- Each of the mounting plate 741, the protection plate 742, and the receiving plate 744 is made of a metal such as stainless steel or aluminum. Adjacent members are joined by an adhesive or an adhesive.
- the heat flux changes with time. That is, the heat flux waveform has a positive peak when the conveyed product M1 is chucked. When the conveyed product M1 is unchucked, the heat flux waveform has a negative peak.
- the elastic body 743 deteriorates or fatigues when used for a long time. Thereby, the elastic body 743 becomes difficult to elastically deform. For this reason, when the elastic body 743 is in the deteriorated state, as shown in FIG. 41, the absolute value of the peak of the heat flux waveform at the time of chucking and unchucking becomes smaller than that in the normal state.
- the elastic body 743 when the elastic body 743 is deteriorated or fatigued, the elastic body 743 is broken and becomes a failure state. In this fault state, as shown in FIG. 41, the peak of the heat flux waveform is hardly seen.
- first threshold values qt11 and qt12 are set so that the normal state of the elastic body 743 and the other states can be discriminated.
- the second threshold values qt13 and qt14 are set so that the deterioration state and the failure state of the elastic body 743 can be discriminated.
- the second threshold values qt13 and qt14 are set to values whose absolute values are smaller than those of the first threshold values qt11 and qt12.
- the control device 12 uses the detection value qx of the heat flux sensor 10 at the chuck timing and the first threshold value qt11 and the second threshold value qt13 as shown in the flowchart of FIG. 31 as in the fifth embodiment. Perform preventive maintenance diagnosis.
- the first threshold value qt1 and the second threshold value qt2 in FIG. 31 are read as the first threshold value qt11 and the second threshold value qt13, respectively.
- control device 12 uses the detection value qx of the heat flux sensor 10 at the unchuck timing, the first threshold value qt12, and the second threshold value qt14 in the flowchart of FIG. 31 as in the fifth embodiment. Perform preventive maintenance diagnosis. At this time, the first threshold value qt1 and the second threshold value qt2 in FIG. 31 are read as the first threshold value qt12 and the second threshold value qt14, respectively.
- the preventive maintenance diagnosis may be performed using the detection value at the timing of only one of the chuck and the unchuck.
- the diagnostic device 1 of this embodiment shown in FIG. 42 performs preventive maintenance diagnosis of the shock absorber 80 as a measurement object.
- the shock absorber 80 is used as a brake for an air cylinder that conveys a conveyed product. As described above, the shock absorber 80 is used as a brake of a driving device in which it is difficult to arbitrarily control acceleration / deceleration.
- the shock absorber 80 includes an outer case 81, an inner case 82, a piston 83, a piston rod 84, oil 85, a gas 86, and a spring 87.
- the inner case 82 is disposed inside the outer case 81.
- the inner case 82 has an orifice 82a provided at the bottom.
- the piston 83 is disposed inside the inner case 82.
- the piston 83 has an orifice 83a.
- the piston rod 84 is continuous with the piston 83.
- Oil 85 is disposed inside the inner case 82.
- the oil 85 is disposed between the outer case 81 and the inner case 82.
- the gas 86 is disposed between the outer case 81 and the inner case 82.
- the spring 87 is disposed inside the inner case 82.
- the shock absorber 80 includes a rubber seal member 88a that seals between the main body 81a of the outer case 81 and the cap 81b.
- the shock absorber 80 includes a rubber seal member 88 b that seals between the piston 83 and the inner case 82.
- the shock absorber 80 includes a rubber seal member 88 c that seals between the piston rod 84 and the outer case 81.
- the shock absorber 80 when the piston rod 84 receives an impact, the piston 83 is pushed into the bottom side of the inner case 82. Thereby, the oil 85 inside the inner case 82 passes through the orifices 82a and 83a. The impact is attenuated by the fluid frictional resistance when the oil 85 passes through the orifices 82a and 83a. At this time, heat is generated by the fluid frictional resistance. The generated heat flows to the outside air through the outer case 81.
- the shock absorber 80 has a function of absorbing kinetic energy by converting kinetic energy that pushes the piston 83 into heat and dissipating heat.
- the heat flux sensor 10 is attached to the outer surface of the cap 81b. In addition, you may attach the heat flux sensor 10 to the outer surface of the main-body part 81a.
- the diagnostic device 1 always measures the heat flux generated from the shock absorber 80 by the heat flux sensor 10 when the conveyed product is conveyed.
- the seal member 88a, 88b, 88c deteriorates, and a deterioration phenomenon that the oil 85 leaks occurs. Moreover, the deterioration phenomenon that the orifices 82a and 83a spread by fluid friction also occurs. If the oil is reduced or the opening area of the orifices 82a and 83a is increased, conversion of kinetic energy into heat energy is less likely to occur. For this reason, the kinetic energy which the shock absorber 80 can absorb decreases. For this reason, the brake of an air cylinder becomes difficult to work. As a result, an operation failure such as the fall of a conveyed product being dropped is likely to occur due to a sudden stop impact.
- the shock absorber 80 when the shock absorber 80 is in a deteriorated state, the conversion to heat energy is small. For this reason, the output of the heat flux sensor 10 changes as shown in FIG. 43 as time elapses. That is, the peak height of the heat flux generated by the collision of the conveyed product is lower than that in the normal state. Further, in a failure state in which the function as a shock absorber is lost due to the progress of deterioration, the peak of the heat flux waveform is hardly seen as shown in FIG.
- the first threshold value qt15 is set so that the normal state of the shock absorber 80 and the other state can be discriminated.
- the second threshold value qt16 is set so that the deterioration state and the failure state of the shock absorber 80 can be discriminated.
- the second threshold value qt16 is set to a value smaller than the first threshold value qt15.
- the control apparatus 12 performs the preventive maintenance diagnosis shown to the flowchart of FIG. 31 similarly to 5th Embodiment using the detection value qx of the heat flux sensor 10, and the 1st threshold value qt15 and the 2nd threshold value qt16. .
- the detection value qx the detection value qx of the collision timing of the conveyed object is used.
- the detection value qx the maximum value of the detection value qx may be used.
- the first threshold value qt1 and the second threshold value qt2 in FIG. 31 are read as the first threshold value qt15 and the second threshold value qt16, respectively. Thereby, it is possible to detect whether the shock absorber 80 is in a normal state, a deteriorated state, or a failure state.
- the heat flux sensor 10 detects the heat flux continuously from the start of operation of the measurement object. However, the heat flux sensor 10 detects the heat flux at every predetermined time interval. You may make it do. This time interval is preferably as short as possible.
- the diagnostic device 1 of the first embodiment detects a heat flux generated by current and voltage.
- the diagnostic device 1 according to the second embodiment detects a heat flux generated by friction.
- the diagnostic device 1 of the third embodiment detects a heat flux generated by sound.
- the diagnostic device 1 according to the fourth embodiment detects a heat flux generated by vibration or friction.
- the type of heat flux detected from the measurement object may be any of current, voltage, sound, vibration, and friction.
- the type of heat flux detected from the measurement object may be one type or a plurality of types. That is, the heat flux detected from the measurement object may be a heat flux generated by at least one of current, voltage, sound, vibration, and friction.
- the heat flux detected from the measurement object may be a heat flux generated by current, voltage, sound, vibration, friction, deformation of the object, or pressure.
- the heat flux generated from the production facility is changed by changing at least one of vibration, friction, sound, voltage, and current as compared with the normal state.
- the heat flux generated from the production facility is changed due to changes in vibration, friction, sound, voltage, current, deformation of the object, and pressure as compared with the normal state. Therefore, an abnormal sign is detected based on the change in the heat flux. Maintenance is performed when abnormal signs are detected. Thereby, generation
- the display device 14 is used as the notification device, but a sound generating device such as a buzzer may be used.
Abstract
Description
計測対象物の故障が生じる前に現れる異常兆候の有無を診断する異常兆候診断装置であって、計測対象物の稼働開始から連続して、または、所定の時間間隔毎に、計測対象物から発生する熱流束を検出する熱流束センサと、熱流束センサの検出結果に基づいて、異常兆候が有るか否かの判定を行う判定部とを備えるものである。
図1に示す本実施形態の異常兆候診断装置1(以下、単に診断装置1という)は、計測対象物としてのバッテリ2の予防保全診断を行うものである。バッテリ2は、リチウム電池セルである。
診断装置1は、熱流束センサ10と、制御装置12と、表示装置14とを備える。
このようにして、バッテリ2の状態基準保全が行われる。
図9に示す本実施形態の診断装置1は、計測対象物としてのボール盤3のドリル31の予防保全診断を行うものである。
このようにして、ドリル31の状態基準保全が行われる。
図14に示す本実施形態の診断装置1は、計測対象物としてのファンフィルタユニット4の予防保全診断を行うものである。
このようにして、フィルタ41の状態基準保全が行われる。
図18に示す本実施形態の診断装置1は、計測対象物としての自動ドア装置5の予防保全診断を行うものである。
このようにして、自動ドア装置5の状態基準保全が行われる。
図23に示す本実施形態の診断装置1は、計測対象物としての図24に示すベルトコンベア60の搬送用ベルト61の予防保全診断を行うものである。
図32に示す本実施形態の診断装置1は、計測対象物としての図24に示すベルトコンベア60のストッパ64の予防保全診断を行うものである。
図35に示す本実施形態の診断装置1は、計測対象物としてのエアシリンダ20のシール部材241、227の予防保全診断を行うものである。
このように、気体の圧力変化によって、時間経過に伴って熱流束が変化する。
図39に示す本実施形態の診断装置1は、計測対象物としての図40に示すチャック装置70の弾性体743の予防保全診断を行うものである。
図42に示す本実施形態の診断装置1は、計測対象物としてのショックアブソーバ80の予防保全診断を行うものである。
また、劣化が進んでショックアブソーバとしての機能が失われた故障状態のときでは、図43に示すように、熱流束波形のピークはほとんど見られなくなる。
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。
2 バッテリ
5 自動ドア装置
10 熱流束センサ
12 制御装置
31 ドリル
41 フィルタ
Claims (4)
- 計測対象物(2、31、41、5、61、64、743、241、227、80)の故障が生じる前に現れる異常兆候の有無を診断する異常兆候診断装置であって、
前記計測対象物の稼働開始から連続して、または、所定の時間間隔毎に、前記計測対象物から発生する熱流束を検出する熱流束センサ(10)と、
前記熱流束センサの検出結果に基づいて、前記異常兆候が有るか否かの判定を行う判定部(12)とを備える異常兆候診断装置。 - 前記計測対象物から発生する熱流束は、電流、電圧、音、振動、摩擦の少なくとも1つによって発生するものである請求項1に記載の異常兆候診断装置。
- 前記計測対象物から発生する熱流束は、電流、電圧、音、振動、摩擦、物体の変形、圧力の少なくとも1つによって発生するものである請求項1に記載の異常兆候診断装置。
- 前記判定部は、前記熱流束センサの検出値と予め定められた第1基準範囲および前記第1基準範囲を含みつつ、前記第1基準範囲よりも広い範囲とされた第2基準範囲とを比較し、前記検出値が前記第1基準範囲外であって、前記第2基準範囲内にあると、前記異常兆候が有ると判定する請求項1ないし3のいずれか1つに記載の異常兆候診断装置。
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EP16851243.2A EP3358333A4 (en) | 2015-10-01 | 2016-09-16 | Fault indication and diagnosing device |
KR1020187008857A KR20180048849A (ko) | 2015-10-01 | 2016-09-16 | 이상징후 진단장치 |
CN201680057892.6A CN108139300A (zh) | 2015-10-01 | 2016-09-16 | 异常征兆诊断装置 |
US15/765,065 US20180313725A1 (en) | 2015-10-01 | 2016-09-16 | Abnormality diagnostic apparatus |
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JP2016158898A JP2017067761A (ja) | 2015-10-01 | 2016-08-12 | 異常兆候診断装置 |
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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 |
CN117347772A (zh) * | 2023-12-04 | 2024-01-05 | 深圳市铭瑞达五金制品有限公司 | 一种石墨烯散热器用的故障监测系统及方法 |
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Publication number | Priority date | Publication date | Assignee | Title |
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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 |
CN117347772A (zh) * | 2023-12-04 | 2024-01-05 | 深圳市铭瑞达五金制品有限公司 | 一种石墨烯散热器用的故障监测系统及方法 |
CN117347772B (zh) * | 2023-12-04 | 2024-03-26 | 深圳市铭瑞达五金制品有限公司 | 一种石墨烯散热器用的故障监测系统及方法 |
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