WO2014091697A1 - 固有振動測定装置 - Google Patents
固有振動測定装置 Download PDFInfo
- Publication number
- WO2014091697A1 WO2014091697A1 PCT/JP2013/006976 JP2013006976W WO2014091697A1 WO 2014091697 A1 WO2014091697 A1 WO 2014091697A1 JP 2013006976 W JP2013006976 W JP 2013006976W WO 2014091697 A1 WO2014091697 A1 WO 2014091697A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- belt
- vibration
- natural
- acceleration
- frequency
- Prior art date
Links
Images
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01H—MEASUREMENT OF MECHANICAL VIBRATIONS OR ULTRASONIC, SONIC OR INFRASONIC WAVES
- G01H13/00—Measuring resonant frequency
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
- G01L5/00—Apparatus for, or methods of, measuring force, work, mechanical power, or torque, specially adapted for specific purposes
- G01L5/04—Apparatus for, or methods of, measuring force, work, mechanical power, or torque, specially adapted for specific purposes for measuring tension in flexible members, e.g. ropes, cables, wires, threads, belts or bands
- G01L5/10—Apparatus for, or methods of, measuring force, work, mechanical power, or torque, specially adapted for specific purposes for measuring tension in flexible members, e.g. ropes, cables, wires, threads, belts or bands using electrical means
- G01L5/106—Apparatus for, or methods of, measuring force, work, mechanical power, or torque, specially adapted for specific purposes for measuring tension in flexible members, e.g. ropes, cables, wires, threads, belts or bands using electrical means for measuring a reaction force applied on a cantilever beam
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01P—MEASURING LINEAR OR ANGULAR SPEED, ACCELERATION, DECELERATION, OR SHOCK; INDICATING PRESENCE, ABSENCE, OR DIRECTION, OF MOVEMENT
- G01P15/00—Measuring acceleration; Measuring deceleration; Measuring shock, i.e. sudden change of acceleration
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01P—MEASURING LINEAR OR ANGULAR SPEED, ACCELERATION, DECELERATION, OR SHOCK; INDICATING PRESENCE, ABSENCE, OR DIRECTION, OF MOVEMENT
- G01P15/00—Measuring acceleration; Measuring deceleration; Measuring shock, i.e. sudden change of acceleration
- G01P15/02—Measuring acceleration; Measuring deceleration; Measuring shock, i.e. sudden change of acceleration by making use of inertia forces using solid seismic masses
- G01P15/08—Measuring acceleration; Measuring deceleration; Measuring shock, i.e. sudden change of acceleration by making use of inertia forces using solid seismic masses with conversion into electric or magnetic values
- G01P15/125—Measuring acceleration; Measuring deceleration; Measuring shock, i.e. sudden change of acceleration by making use of inertia forces using solid seismic masses with conversion into electric or magnetic values by capacitive pick-up
Definitions
- the present invention relates to a natural vibration measuring device that measures the natural frequency of a belt, and more particularly to a technique for improving the measurement accuracy of the natural frequency.
- a belt that is stretched between pulleys in a belt transmission device and used with an appropriate tension at the time of use may reduce the efficiency of transmission of the pulley rotational force or shorten the life of the belt itself. . Therefore, conventionally, a tension inspection is performed in which the tension of a belt used in the belt transmission device is measured and whether or not an appropriate tension is applied to the belt.
- a sonic belt tension measuring device For belt tension inspection, a sonic belt tension measuring device is often used because it can easily measure tension without contact.
- the sonic belt tension measuring device uses a microphone to detect sound waves generated by belt vibration when the belt stretched between pulleys is vibrated, and measures the natural frequency from the sound waves detected by the microphone.
- a vibration measuring device is provided, and the belt tension corresponding to the natural frequency measured by the natural vibration measuring device is calculated according to a predetermined calculation formula (see, for example, Patent Document 1).
- the reliable vibration frequency that can be measured effectively is limited to a narrow range, and the vibration of the belt to be measured is a high-frequency vibration or a low-frequency vibration.
- the measurement accuracy is not sufficient.
- the present invention has been made in view of such points, and an object of the present invention is to accurately measure the natural frequency of the belt over a wide frequency range.
- the present invention employs an acceleration sensor as an element for detecting the vibration of the belt.
- the present invention is directed to a natural vibration measuring apparatus that measures the natural frequency of a belt stretched between at least two pulleys when the belt is vibrated. It was taken.
- the first invention is the above-described natural vibration measuring apparatus, An acceleration sensor attached to a belt portion located between the adjacent pulleys for detecting acceleration due to vibration of the belt; And a measuring instrument for measuring the natural frequency of the belt based on the acceleration detected by the acceleration sensor.
- the natural frequency of the belt is measured based on the acceleration detected by the acceleration sensor directly attached to the belt, the vibration of the belt is directly detected by the acceleration sensor.
- the measurement results are not disturbed by the external environment such as background noise, unlike the non-contact type natural vibration measurement device using a microphone, and low frequency vibration can be detected with high accuracy.
- High-precision measurement is possible regardless of whether the vibration of a belt is high-frequency vibration or low-frequency vibration. Therefore, the natural frequency of the belt can be accurately measured over a wide frequency range.
- a second aspect of the invention is the natural vibration measuring apparatus according to the first aspect of the invention,
- the measuring device measures a natural frequency of the belt based on acceleration detected by the acceleration sensor in a period of 80 milliseconds to 1400 milliseconds after the belt is vibrated. .
- the vibration of the belt immediately after the vibration includes a lot of noise components such as an impact component at the time of vibration, and is not reliable as data for calculating the natural frequency of the belt. Since the noise component attenuates with time, the belt gradually vibrates with a waveform exhibiting the natural frequency of the belt with time.
- the vibration of the belt attenuates over time, and the weak belt vibration that has been attenuated is dominated by the noise component that is not related to the natural vibration of the belt. It is buried and has low reliability as data for calculating the natural frequency of the belt.
- the period in which the belt vibration includes a lot of noise components is a period from the vibration of the belt to about 80 milliseconds, or until the transition to the weak belt vibration with low reliability that has been damped. It has been found empirically that the period is from the vibration of the belt to about 1400 milliseconds.
- the natural frequency of the belt is measured by omitting the initial vibration of the belt containing a lot of noise components immediately after vibration and the final vibration in which the natural vibration of the belt is buried in the noise component. The natural frequency of the belt can be measured with higher accuracy.
- 3rd invention is the natural vibration measuring apparatus of 1st or 2nd invention, The measuring device determines the natural frequency of the belt in a frequency region of 10 Hz or more.
- the natural frequency of the belt is determined by omitting a frequency region of less than 10 Hz where such a noise component is easily detected, the natural frequency of the belt can be measured with higher accuracy. It becomes possible.
- the measuring device detects that the belt is vibrated when an acceleration greater than 2.0 gravitational acceleration is detected by the acceleration sensor.
- the acceleration sensor detects an acceleration of less than 2.0 gravitational acceleration and detects that the belt is vibrated, the belt will vibrate slightly due to the measurement operation and measurement environment until the belt is vibrated.
- the vibration of the belt is likely to be erroneously detected, and the measurement of the natural frequency is started unintentionally by using the vibration as a trigger. become. In that case, a measurement error occurs, or even if the measurement can be performed, the accuracy is remarkably deteriorated.
- the acceleration sensor detects that the belt is vibrated when acceleration greater than 2.0 gravitational acceleration is detected, the measurement operation until the belt is vibrated is detected.
- the measurement of the natural frequency of the belt can be prevented from starting unintentionally by the small vibration generated in the belt due to the measurement environment or the trigger, and the measurement of the natural frequency of the belt is started at the desired timing. can do. Thereby, generation
- the acceleration sensor and the measuring device are connected by a wired communication cable,
- the communication cable has a scale in the length direction thereof.
- the communication cable for connecting the acceleration sensor and the measuring instrument by wire is provided with a scale along the length direction, the communication cable can be used as a measure.
- the span length between the pulleys around which the belt is stretched is required as information.
- the vibration of the belt is directly detected by the acceleration sensor.
- the natural frequency can be accurately measured over a wide frequency range.
- FIG. 1 is a plan view showing an external configuration of a natural vibration measuring apparatus according to Embodiment 1 of the present invention.
- FIG. 2 is a block diagram schematically showing a hardware configuration of the natural vibration measuring apparatus according to the first embodiment of the present invention.
- FIG. 3 is a diagram illustrating an example of a belt transmission device including a belt to be measured.
- FIG. 4 is a graph showing raw acceleration data due to belt vibration measured using the natural vibration measuring apparatus according to the first embodiment of the present invention.
- FIG. 5 is a graph obtained by power spectrum conversion of acceleration data sampled and collected by the natural vibration measuring apparatus according to the first embodiment of the present invention.
- FIG. 6 is a flowchart showing a method for measuring the natural frequency of the belt using the natural vibration measuring apparatus according to the first embodiment of the present invention.
- FIG. 7 is a plan view showing an external configuration of the natural vibration measuring apparatus according to the second embodiment of the present invention.
- FIG. 8 is a graph obtained by power spectrum conversion of acceleration data when an acceleration signal is sampled over a relatively long time including weak belt vibration that has been damped.
- FIG. 1 is a plan view showing an external configuration of the natural vibration measuring apparatus S according to the first embodiment.
- FIG. 2 is a block diagram schematically showing a hardware configuration of the natural vibration measuring apparatus S according to the first embodiment.
- FIG. 3 is a diagram illustrating a belt transmission device 100 including a belt 101 to be measured.
- the natural vibration measuring device S is used, for example, for measuring the natural frequency of the belt 101 provided in the belt transmission device 100 shown in FIG.
- the belt transmission device 100 is used, for example, for driving an auxiliary machine of an automobile.
- the natural frequency of the belt 101 measured by the natural vibration measuring device S is used as information for measuring the tension of the belt 101 in the belt transmission device 100.
- the natural vibration measuring device S is a belt transmission device 100 in which the belt 101 is stretched between at least two (two in the example shown in FIG. 3) pulleys 102 and 103 shown in FIG.
- the natural frequency of the belt 101 is measured from the vibration when the belt 101 located at the position is vibrated with a hammer or a finger.
- the belt 101 to be measured is a thick belt such as a V belt (wrapped V belt or low edge V belt) having a thickness of 10 mm or more.
- V belt wrapped V belt or low edge V belt
- the belt 101 exhibits low frequency vibration.
- low-frequency vibrations particularly vibrations of 25 Hz or less are often not detected by a microphone, and it is difficult to accurately measure with a sound wave type natural vibration measuring apparatus.
- the natural vibration measuring device S includes an acceleration sensor 11 that detects acceleration due to vibration of the belt 101, and a measuring instrument that measures the natural frequency of the belt 101 based on the acceleration detected by the acceleration sensor 11. 13.
- the acceleration sensor 11 and the measuring instrument 13 are connected to each other by a communication cable 15 (for example, by USB (Universal Serial Bus)).
- the acceleration sensor 11 is attached to the belt transmission device 100 on the outer peripheral surface (upper surface) of the belt 101 portion located between adjacent pulleys 102 and 103, as shown in FIG.
- a surface of the acceleration sensor 11 that is attached to the belt 101 is provided with an adhesive surface that can be repeatedly affixed, such as a double-sided tape.
- the acceleration sensor 11 can be easily attached to the belt 101 by simply attaching an adhesive surface to the surface of the belt 101.
- the acceleration sensor 11 is an acceleration sensor that can detect acceleration in a direction perpendicular to the surface of the belt 101, and is, for example, a three-axis acceleration sensor.
- a capacitance detection type MEMS (Micro Electro Mechanical System) type acceleration sensor is preferably employed because stable acceleration can be detected.
- the capacitance type MEMS acceleration sensor 11 includes a detection element unit that detects acceleration, and a signal processing circuit that amplifies and adjusts the signal from the detection element unit and outputs the amplified signal.
- the detection element part is formed of a stable material such as silicon (Si), has a sensor element movable part and a fixed part, and detects acceleration based on a change in capacitance between the sensor element movable part and the fixed part. Is configured to do.
- the acceleration sensor 11 may be replaced with another detection method or type of acceleration sensor such as a piezoresistive MEMS acceleration sensor instead of the capacitance detection MEMS acceleration sensor.
- a uniaxial or biaxial acceleration sensor may be used as long as acceleration in a direction perpendicular to the surface of the belt 101 can be detected.
- the measuring instrument 13 is formed in a palm-like flat shape, and is compact and easy to carry.
- a USB port (not shown) is provided at the upper end of the measuring instrument 13, and a USB connector (not shown) provided at one end of the communication cable 15 is connected to the USB port.
- a display unit 17 including a liquid crystal display for displaying the measured natural frequency of the belt 101, various switches such as a power switch 19 and a monitoring switch 21, and the ON / OFF state of the power source are displayed on the front surface of the measuring instrument 13, a display unit 17 including a liquid crystal display for displaying the measured natural frequency of the belt 101, various switches such as a power switch 19 and a monitoring switch 21, and the ON / OFF state of the power source are displayed.
- a status display lamp such as a power indicator 23 composed of an LED (Light Emitting Diode) is provided.
- the measuring device 13 includes a microprocessor such as a DSP (Digital Signal Processor) 25 and an EEPROM (Electrically / Erasable / Programmable / Read-only Memory) electrically connected thereto. 27 are built in.
- a microprocessor such as a DSP (Digital Signal Processor) 25 and an EEPROM (Electrically / Erasable / Programmable / Read-only Memory) electrically connected thereto. 27 are built in.
- the memory unit 27 stores a program for measuring the natural frequency of the belt 101 including a fast Fourier transform (FFT) calculation program.
- FFT fast Fourier transform
- the DSP 25 is electrically connected to the display unit 17, various switches such as the power switch 19 and the monitoring switch 21, and status display lamps such as the power indicator 23.
- the DSP 25 executes a process of measuring the natural frequency of the belt 101 according to the acceleration signal input from the monitoring switch 21 or the acceleration sensor 11 by control according to the program read from the memory unit 27. .
- FIG. 4 is a graph showing acceleration raw data due to vibration of the belt 101 measured using the natural vibration measuring device S.
- FIG. 5 is a graph obtained by power spectrum conversion of acceleration data sampled and collected by the natural vibration measuring device S.
- FIG. 8 is a graph obtained by power spectrum conversion of acceleration data when an acceleration signal is sampled over a relatively long time including weak belt vibration that has been damped.
- the DSP 25 When the power switch 19 is pressed, the DSP 25 activates the measuring instrument 13 and lights the power indicator 23. When the monitoring switch 21 is pressed, the DSP 25 monitors the acceleration signal input from the acceleration sensor 11 and starts monitoring the vibration state of the belt 101 shown in FIG.
- the DSP 25 detects that the belt 101 has been vibrated when detecting an acceleration larger than a predetermined acceleration based on the acceleration signal input from the acceleration sensor 11, and then the natural frequency of the belt 101. Start measuring.
- the predetermined acceleration serving as a trigger for starting the measurement of the natural frequency of the belt 101 is triggered by a small vibration generated in the belt 101 due to the measurement operation or measurement environment until the belt 101 is vibrated. From the viewpoint of preventing the number measurement from being started unintentionally, it is preferably 2.0 G (G is gravitational acceleration) or more, and more preferably 3.0 G or more. In the present embodiment, the predetermined acceleration as a trigger is set to 3.0G.
- the DSP 25 samples the acceleration signal from the acceleration sensor 11 and starts acquiring the acceleration data.
- the sampling frequency at this time is set to about 3.2 kHz, for example.
- the DSP 25 starts recording the sampled acceleration data 80 milliseconds after the vibration of the belt 101 is detected, that is, after waiting for a period for sampling 256 points of acceleration data.
- the DSP 25 records the acceleration data sampled over a period Rt of 1280 milliseconds from the start of recording, that is, a period of 1360 milliseconds after the vibration of the belt 101 is detected, and the acceleration data of a total of 4096 points is recorded. collect.
- the vibration of the belt 101 immediately after the vibration includes a lot of noise components such as an impact component at the time of vibration, and is not reliable as data for calculating the natural frequency of the belt 101. Since the noise component attenuates as time elapses, the belt 101 gradually vibrates with a waveform exhibiting the natural frequency of the belt 101 as time elapses.
- the present inventors have empirically found that the period in which the vibration of the belt 101 contains a large amount of the noise component is about 80 milliseconds after the vibration of the belt 101. Therefore, in this embodiment, the natural frequency is measured by omitting the initial vibration of the belt 101 over 80 milliseconds immediately after the vibration as described above.
- the vibration of the belt 101 is attenuated as time passes, and the weak belt vibration (vibration indicated by the range X in FIG. 4) that has been damped is dominated by noise components that are not related to the natural vibration of the belt 101. Therefore, the reliability as data for calculating the natural frequency of the belt 101 is low.
- the inventors of the present invention have empirically found that the period until transition to weak belt vibration that has been attenuated and has low reliability is from the vibration of the belt 101 to about 1400 milliseconds. Therefore, in the present embodiment, as described above, the sampling of the acceleration signal is stopped within 1280 milliseconds after the vibration of the belt 101 is detected, and the intrinsic vibration of the belt 101 is omitted by omitting the final vibration in which the natural vibration is buried in the noise component. The frequency was measured.
- the DSP 25 that has acquired the acceleration data as described above reads the FFT calculation program from the memory unit 27, performs FFT calculation processing on the sampled acceleration data (4096 points), and based on the acceleration data as shown in FIG. Obtain the power spectrum of the vibration frequency.
- the DSP 25 determines the vibration frequency corresponding to the peak of the power spectrum as the natural frequency of the belt 101.
- the DSP 25 ignores the power spectrum peak at less than 10 Hz and determines the natural frequency in the frequency region of 10 Hz or higher. Noise components not related to the natural vibration of the belt 101 are likely to be detected in a low frequency region of less than 10 Hz. Therefore, the natural frequency of the belt 101 can be accurately measured by determining the natural frequency of the belt 101 by omitting the frequency region below 10 Hz.
- the DSP 25 displays the natural frequency determined as described above on the display unit 17.
- FIG. 6 is a flowchart showing a method for measuring the natural frequency of the belt 101 in the present embodiment.
- the power switch 19 is pressed to turn on the natural vibration measuring device S (ST1). Then, as shown in FIG. 3, the acceleration sensor 11 is attached on the outer peripheral surface of the belt 101 at a position corresponding to the intermediate position between the two pulleys 102 and 103 on which the belt 101 is stretched or in the vicinity thereof (ST2). ).
- the monitoring switch 21 is pressed to start monitoring the acceleration signal input from the acceleration sensor 11 to the measuring instrument 13 (ST3).
- the belt 101 is vibrated by striking the vicinity of the belt 101 where the acceleration sensor 11 is attached, that is, the middle of the belt 102 between the pulleys 102 and 103 with a hammer or finger (ST4).
- the measuring instrument 13 When the acceleration signal of 3.0 G or more is detected by the measuring instrument 13 due to the vibration of the belt 101, the measuring instrument 13 starts sampling the acceleration signal. Then, after waiting for 80 milliseconds (ST5) from the start of sampling of the acceleration signal, the measuring device 13 starts recording of the sampling data, and the acceleration data is sampled and collected in a period Rt extending from this recording start to 1280 milliseconds. (ST6). Then, frequency analysis is performed on the collected acceleration data by FFT calculation processing (ST7), and the natural frequency obtained as a result is displayed on the display unit 17 (ST8).
- the natural frequency of the belt 101 in the belt transmission device 100 can be measured.
- the vibration of the belt 101 is directly detected by the acceleration sensor 11. .
- the measurement result is not disturbed by an external environment such as background noise, unlike a sound wave type natural vibration measuring device using a microphone, and low frequency vibration can be accurately detected.
- the vibration of the belt 101 is high-frequency vibration or low-frequency vibration, measurement can be performed with high accuracy. Therefore, the natural frequency of the belt 101 can be accurately measured over a wide frequency range. Therefore, even the thick belt 101 exhibiting low frequency vibration can accurately measure the natural frequency.
- the belt 101 omits the initial vibration of the belt 101 immediately after vibration including a lot of noise components not related to the natural vibration and the final vibration in which the natural vibration of the belt 101 is buried in the noise component. Since the natural frequency of the belt 101 is determined by measuring the natural frequency of the belt 101 and omitting the frequency region of less than 10 Hz where noise components are easily detected, the natural frequency of the belt 101 can be accurately measured. it can.
- FIG. 7 is a plan view showing an external configuration of the natural vibration measuring apparatus S according to the second embodiment.
- the configuration of the communication cable 15 is different from that of the first embodiment except that the natural vibration measuring device S is configured in the same manner as in the first embodiment, only the communication cable 15 having a different configuration will be described.
- the measurement method of the same component location and natural frequency is left to the description of the first embodiment based on FIGS. 1 to 6, and the detailed description thereof is omitted.
- the span length between the pulleys 102 and 103 shown in FIG. L is required as information. Therefore, the communication cable 15 of the natural vibration measuring apparatus S according to the present embodiment is provided with a scale so that the span length L can be measured in the length direction as shown in FIG. Yes.
- the communication cable 15 that connects the acceleration sensor 11 and the measuring instrument 13 by wire is provided with a scale along the length direction, so that the communication cable 15 can be used as a measure. Accordingly, the span length L between the pulleys 102 and 103 on which the belt 101 is stretched can be measured using the communication cable 15 without preparing a measure separately from the natural vibration measuring device S. The number of tools necessary for measuring the tension of the belt 101 can be reduced.
- the DSP 25 is based on acceleration data obtained by sampling an acceleration signal input from the acceleration sensor 11 in a period Rt of 80 milliseconds to 1360 milliseconds after the belt 101 is vibrated.
- the sampling period of acceleration data used for measuring the natural frequency of the belt 101 is 80 milliseconds after the belt 101 is vibrated. May be included, and a period exceeding 1360 milliseconds after the belt 101 is vibrated may be included.
- the belt 101 to be measured by the natural vibration measuring device S is a thick belt such as a V belt.
- the present invention is not limited to this, and the natural vibration measuring device S is Of course, the present invention can be applied to a device for measuring the natural frequency of a thin belt 101 such as a flat belt having a thickness of 5 mm or less, or a device for measuring the natural frequency of a belt 101 having a thickness of more than 5 mm and less than 10 mm. Is possible.
- the natural vibration of the belt 101 may be a high-frequency vibration of approximately 400 Hz to 500 Hz.
- the acoustic natural vibration measurement device is easily affected by background noise, and it is difficult to accurately measure the natural frequency of the belt.
- the background noise is low.
- the natural vibration of the belt 101 can be measured with high accuracy even if it is a high frequency vibration.
- the present invention is useful for a natural vibration measuring apparatus that measures the natural frequency of a belt, and in particular, it is desired to accurately measure the natural frequency of a belt over a wide frequency range. Suitable for natural vibration measuring devices.
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Measurement Of Mechanical Vibrations Or Ultrasonic Waves (AREA)
- Testing Of Devices, Machine Parts, Or Other Structures Thereof (AREA)
- Force Measurement Appropriate To Specific Purposes (AREA)
Abstract
Description
上記隣り合うプーリ間に位置するベルト部分に取り付けられて該ベルトの振動による加速度を検出する加速度センサと、
上記加速度センサにより検出された加速度に基づき上記ベルトの固有振動数を測定する測定器と、を備える
ことを特徴とする。
上記測定器は、上記ベルトが加振されてから80ミリ秒以上且つ1400ミリ秒以下の期間に上記加速度センサにより検出された加速度に基づき、上記ベルトの固有振動数を測定する
ことを特徴とする。
上記測定器は、10Hz以上の周波数領域において上記ベルトの固有振動数を決定することを特徴とする。
上記測定器は、上記加速度センサにより2.0重力加速度よりも大きな加速度が検出されたときに、上記ベルトが加振されたことを検知する
ことを特徴とする。
上記加速度センサと上記測定器とは、通信ケーブルにより有線で接続され、
上記通信ケーブルには、その長さ方向に目盛が設けられている
ことを特徴とする。
図1は、この実施形態1に係る固有振動測定装置Sの外観構成を示す平面図である。図2は、この実施形態1に係る固有振動測定装置Sのハード構成を概略的に示すブロック図である。図3は、測定対象となるベルト101を備えるベルト伝動装置100を示す図である。
固有振動測定装置Sは、図3に示す少なくとも2つ(図3に示す例では2つ)のプーリ102,103にベルト101が張り渡されたベルト伝動装置100において、隣り合うプーリ102,103間に位置するベルト101部分をハンマーや指で加振したときの振動から、該ベルト101の固有振動数を測定する。
次に、上記固有振動測定装置Sを用いてベルト101の固有振動数を測定する方法について、図6を参照しながら説明する。図6は、本実施形態におけるベルト101の固有振動数の測定方法を示すフロー図である。
この実施形態1によると、ベルト101に直接取り付けられた加速度センサ11で検出された加速度に基づいて当該ベルト101の固有振動数を測定するので、ベルト101の振動が加速度センサ11により直接検出される。これにより、マイクロフォンを用いた音波式の固有振動測定装置のように測定結果が暗騒音などの外部環境に障害されることがなく、また、低周波振動も正確に検出できるので、測定対象であるベルト101の振動が高周波振動であると低周波振動であるとに拘わらず高精度に測定可能になる。よって、ベルト101の固有振動数を広範囲な周波数領域に亘って精度良く測定することができる。したがって、低周波振動を呈する厚手のベルト101であっても、固有振動数を精度良く測定することができる。
図7は、この実施形態2に係る固有振動測定装置Sの外観構成を示す平面図である。
この実施形態2によると、加速度センサ11と測定器13とを有線接続する通信ケーブル15に長さ方向に沿った目盛りが設けられているので、該通信ケーブル15をメジャーとして用いることができる。これにより、固有振動測定装置Sと別個にメジャーを準備しなくても、通信ケーブル15を利用してベルト101が張り渡されたプーリ102,103間のスパン長さLを測定することができ、ベルト101の張力測定に必要な道具点数を減らすことができる。
11 加速度センサ
13 測定器
15 通信ケーブル
17 表示部
19 電源スイッチ
21 モニタリングスイッチ
23 電源インジケータ
25 DSP
27 メモリ部
100 ベルト伝動装置
101 ベルト
102,103 プーリ
Claims (5)
- 少なくとも2つのプーリにベルトが張り渡されたベルト伝動装置において、隣り合うプーリ間に位置するベルト部分を加振したときの振動から、該ベルトの固有振動数を測定する固有振動測定装置であって、
上記隣り合うプーリ間に位置するベルト部分に取り付けられて該ベルトの振動による加速度を検出する加速度センサと、
上記加速度センサにより検出された加速度に基づき上記ベルトの固有振動数を測定する測定器と、を備える
ことを特徴とする固有振動測定装置。 - 請求項1に記載された固有振動測定装置において、
上記測定器は、上記ベルトが加振されてから80ミリ秒以上且つ1400ミリ秒以下の期間に上記加速度センサによって検出された加速度に基づき、上記ベルトの固有振動数を測定する
ことを特徴とする固有振動測定装置。 - 請求項1又は2に記載された固有振動測定装置において、
上記測定器は、10Hz以上の周波数領域において上記ベルトの固有振動数を決定することを特徴とする固有振動測定装置。 - 請求項1~3のいずれか1項に記載された固有振動測定装置において、
上記測定器は、上記加速度センサにより2.0重力加速度よりも大きな加速度が検出されたときに、上記ベルトが加振されたことを検知する
ことを特徴とする固有振動測定装置。 - 請求項1~4のいずれか1項に記載された固有振動測定装置において、
上記加速度センサと上記測定器とは、通信ケーブルにより有線で接続され、
上記通信ケーブルには、その長さ方向に目盛が設けられている
ことを特徴とする固有振動測定装置。
Priority Applications (5)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2014551852A JPWO2014091697A1 (ja) | 2012-12-10 | 2013-11-27 | 固有振動測定装置 |
DE112013005893.6T DE112013005893T5 (de) | 2012-12-10 | 2013-11-27 | Eigenschwingungsmessvorrichtung |
KR1020157013132A KR20150094605A (ko) | 2012-12-10 | 2013-11-27 | 고유 진동 측정장치 |
CN201380058592.6A CN104781643B (zh) | 2012-12-10 | 2013-11-27 | 固有振动测量装置 |
US14/715,975 US9778098B2 (en) | 2012-12-10 | 2015-05-19 | Natural-frequency measurement device |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2012-269753 | 2012-12-10 | ||
JP2012269753 | 2012-12-10 |
Related Child Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US14/715,975 Continuation US9778098B2 (en) | 2012-12-10 | 2015-05-19 | Natural-frequency measurement device |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2014091697A1 true WO2014091697A1 (ja) | 2014-06-19 |
Family
ID=50934005
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/JP2013/006976 WO2014091697A1 (ja) | 2012-12-10 | 2013-11-27 | 固有振動測定装置 |
Country Status (7)
Country | Link |
---|---|
US (1) | US9778098B2 (ja) |
JP (1) | JPWO2014091697A1 (ja) |
KR (1) | KR20150094605A (ja) |
CN (1) | CN104781643B (ja) |
DE (1) | DE112013005893T5 (ja) |
TW (1) | TWI605239B (ja) |
WO (1) | WO2014091697A1 (ja) |
Families Citing this family (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN108027060A (zh) * | 2015-09-29 | 2018-05-11 | 舍弗勒技术股份两合公司 | 用于缠绕式变速器的缠绕器件的滑轨和用于求取作用在锥盘对上的扭矩的测量方法 |
KR102480036B1 (ko) * | 2017-05-02 | 2022-12-21 | 라이트람, 엘엘씨 | 컨베이어 벨트용 용량성 결합 센서 시스템 |
EP3403980B1 (en) | 2017-05-16 | 2022-01-26 | Otis Elevator Company | Method for tensioning of a load bearing member of an elevator system |
CN115087853A (zh) * | 2020-02-03 | 2022-09-20 | 日本电气株式会社 | 振动处理装置、振动处理方法和程序 |
Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS62261937A (ja) * | 1986-05-09 | 1987-11-14 | Mitsubishi Motors Corp | ベルト張力測定装置 |
JPH08327477A (ja) * | 1995-06-05 | 1996-12-13 | Mitsubishi Electric Corp | ベルト張力測定装置 |
JPH09211340A (ja) * | 1996-01-30 | 1997-08-15 | Kowa Kk | 水中観察装置 |
JP2004177190A (ja) * | 2002-11-26 | 2004-06-24 | Fuji Electric Systems Co Ltd | 超音波式汚泥界面計 |
JP2005257350A (ja) * | 2004-03-10 | 2005-09-22 | Gates Unitta Asia Co | ベルト張力計 |
WO2010087266A1 (ja) * | 2009-01-27 | 2010-08-05 | 国立大学法人名古屋大学 | 膜張力測定装置 |
Family Cites Families (17)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS62112018A (ja) * | 1985-11-11 | 1987-05-23 | Mitsubishi Electric Corp | 振動検知装置 |
JPH0663825B2 (ja) | 1992-04-07 | 1994-08-22 | 株式会社河内研究所 | 固有振動数測定装置およびこれを用いた張力測定装置 |
JP2827829B2 (ja) * | 1993-08-16 | 1998-11-25 | 三菱自動車工業株式会社 | ベルトの張力検査装置 |
JPH08292111A (ja) * | 1995-04-24 | 1996-11-05 | Mitsubishi Electric Corp | ベルト張力測定装置 |
JP4497614B2 (ja) | 2000-01-07 | 2010-07-07 | イビデン株式会社 | 多層プリント配線板の製造方法 |
JP2001264151A (ja) * | 2000-03-23 | 2001-09-26 | Mitsubishi Heavy Ind Ltd | 衝撃物の質量検知方法及び装置 |
US7185546B2 (en) * | 2004-06-14 | 2007-03-06 | Ascenx | Systems and methods for measuring belt tension |
JP4846283B2 (ja) * | 2005-07-04 | 2011-12-28 | 三ツ星ベルト株式会社 | ベルト張力測定装置及びベルト張力測定方法、並びにプログラム |
CN101201282A (zh) * | 2007-12-20 | 2008-06-18 | 宁波大学 | 一种用于斜拉桥索力检测的基频识别方法 |
US8328005B2 (en) * | 2009-04-28 | 2012-12-11 | Siemens Industry, Inc. | Belt tension indicator |
CN101726383B (zh) * | 2009-12-11 | 2011-03-16 | 太原理工大学 | 多绳提升机钢丝绳张力检测方法 |
JP5586011B2 (ja) | 2010-03-18 | 2014-09-10 | 独立行政法人産業技術総合研究所 | Fbg振動検出システム、該システムを用いた装置及び振動検出方法 |
CN102252792B (zh) * | 2010-05-18 | 2015-03-04 | 同济大学 | 一种杆件绝对轴力测试方法 |
CN101936795B (zh) * | 2010-07-27 | 2012-05-23 | 同济大学 | 基于模态分析高精度的拉索索力测试方法 |
CN102121858A (zh) * | 2010-12-20 | 2011-07-13 | 浙江大学 | 部分斜拉桥拉索钢绞线张力测试方法 |
JP5478552B2 (ja) * | 2011-05-13 | 2014-04-23 | 調和工業株式会社 | 離間配置バイブロハンマの連動装置及び杭又は壁体の打設方法 |
US9182300B2 (en) * | 2012-10-10 | 2015-11-10 | Bosch Automotive Service Solutions Inc. | Method and system for measuring belt tension |
-
2013
- 2013-11-27 CN CN201380058592.6A patent/CN104781643B/zh not_active Expired - Fee Related
- 2013-11-27 JP JP2014551852A patent/JPWO2014091697A1/ja active Pending
- 2013-11-27 DE DE112013005893.6T patent/DE112013005893T5/de not_active Ceased
- 2013-11-27 KR KR1020157013132A patent/KR20150094605A/ko not_active Application Discontinuation
- 2013-11-27 WO PCT/JP2013/006976 patent/WO2014091697A1/ja active Application Filing
- 2013-12-04 TW TW102144407A patent/TWI605239B/zh active
-
2015
- 2015-05-19 US US14/715,975 patent/US9778098B2/en active Active
Patent Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS62261937A (ja) * | 1986-05-09 | 1987-11-14 | Mitsubishi Motors Corp | ベルト張力測定装置 |
JPH08327477A (ja) * | 1995-06-05 | 1996-12-13 | Mitsubishi Electric Corp | ベルト張力測定装置 |
JPH09211340A (ja) * | 1996-01-30 | 1997-08-15 | Kowa Kk | 水中観察装置 |
JP2004177190A (ja) * | 2002-11-26 | 2004-06-24 | Fuji Electric Systems Co Ltd | 超音波式汚泥界面計 |
JP2005257350A (ja) * | 2004-03-10 | 2005-09-22 | Gates Unitta Asia Co | ベルト張力計 |
WO2010087266A1 (ja) * | 2009-01-27 | 2010-08-05 | 国立大学法人名古屋大学 | 膜張力測定装置 |
Also Published As
Publication number | Publication date |
---|---|
TWI605239B (zh) | 2017-11-11 |
DE112013005893T5 (de) | 2015-09-24 |
TW201428244A (zh) | 2014-07-16 |
US9778098B2 (en) | 2017-10-03 |
US20150253181A1 (en) | 2015-09-10 |
CN104781643A (zh) | 2015-07-15 |
KR20150094605A (ko) | 2015-08-19 |
CN104781643B (zh) | 2017-05-03 |
JPWO2014091697A1 (ja) | 2017-01-05 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
JP6334039B2 (ja) | 固有周波数測定装置、ベルト張力算出プログラム及び方法、並びにベルト固有周波数算出プログラム及び方法 | |
WO2014091697A1 (ja) | 固有振動測定装置 | |
CN104422354B (zh) | 确认尺寸测量手工工具中的工件测量值的方法 | |
RU2013141164A (ru) | Способ и устройство для обнаружения подводных сигналов | |
CN102947671B (zh) | 用于测量坐标测量装置上的工件的坐标的方法 | |
WO2016069812A1 (en) | Blockage detection for a microelectromechanical systems sensor | |
TW200530929A (en) | Touch sensitive device employing bending wave vibration sensing and excitation transducers | |
JP2009537835A5 (ja) | ||
WO2004025231A3 (en) | Acoustic sensing device, system and method for monitoring emissions from machinery | |
JP2017508168A (ja) | 繊維部材中の欠陥のオンライン検出 | |
JP2014006262A (ja) | 工作物表面を走査する方法および接触感知プローブ | |
JP2002034930A (ja) | 表面構造の弾性特性を測定する測定装置 | |
JP2010203866A (ja) | 機器の異常検出装置 | |
JP6207309B2 (ja) | 電子体温計および報知装置 | |
JP5070146B2 (ja) | 試験方法及び試験装置 | |
JP2004177142A (ja) | 摩擦力測定装置 | |
JP2012208487A (ja) | 有音程の膜鳴打楽器の調律方法および装置 | |
WO2024018699A1 (ja) | 漏れ検出装置 | |
CN209878124U (zh) | 一种电动机振动量传感器 | |
JP2010112934A (ja) | 膜スチフネス測定装置及び膜スチフネス測定方法 | |
JP4830111B2 (ja) | 硬度及び湿潤度識別装置 | |
KR101673788B1 (ko) | 사용자 입력 인식 장치 | |
JP2007225433A (ja) | 振動モード判定方法及び振動モード判定装置 | |
WO2004109249A3 (de) | Schallaufnehmer | |
JP2005114439A (ja) | 打撃試験方法及び装置 |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
121 | Ep: the epo has been informed by wipo that ep was designated in this application |
Ref document number: 13861948 Country of ref document: EP Kind code of ref document: A1 |
|
ENP | Entry into the national phase |
Ref document number: 2014551852 Country of ref document: JP Kind code of ref document: A |
|
ENP | Entry into the national phase |
Ref document number: 20157013132 Country of ref document: KR Kind code of ref document: A |
|
WWE | Wipo information: entry into national phase |
Ref document number: 112013005893 Country of ref document: DE Ref document number: 1120130058936 Country of ref document: DE |
|
122 | Ep: pct application non-entry in european phase |
Ref document number: 13861948 Country of ref document: EP Kind code of ref document: A1 |