WO2004008957A1 - 作業快適度評価装置および作業快適度評価方法 - Google Patents
作業快適度評価装置および作業快適度評価方法 Download PDFInfo
- Publication number
- WO2004008957A1 WO2004008957A1 PCT/JP2003/009154 JP0309154W WO2004008957A1 WO 2004008957 A1 WO2004008957 A1 WO 2004008957A1 JP 0309154 W JP0309154 W JP 0309154W WO 2004008957 A1 WO2004008957 A1 WO 2004008957A1
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- Prior art keywords
- pair
- work
- time
- waveform
- synchronous contraction
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Classifications
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B5/00—Measuring for diagnostic purposes; Identification of persons
- A61B5/16—Devices for psychotechnics; Testing reaction times ; Devices for evaluating the psychological state
- A61B5/18—Devices for psychotechnics; Testing reaction times ; Devices for evaluating the psychological state for vehicle drivers or machine operators
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B5/00—Measuring for diagnostic purposes; Identification of persons
- A61B5/24—Detecting, measuring or recording bioelectric or biomagnetic signals of the body or parts thereof
- A61B5/316—Modalities, i.e. specific diagnostic methods
- A61B5/389—Electromyography [EMG]
Definitions
- the present invention relates to a light source for a work performed by a pair of muscles (muscles) of a human body provided symmetrically.
- the present invention relates to a work comfort evaluation device and a work comfort evaluation method for evaluating work comfort by measuring a myoelectric potential, for example, a book, an evaluation device for evaluating a steering comfort when a driver steers a vehicle, and an evaluation device. Regarding the evaluation method.
- the driver's steering of the vehicle is a task performed by the triangular muscle, which is a pair of muscles of the human body that are provided symmetrically, and it is said that the less strained muscle does not necessarily lead to the comfort during steering. There is a fact.
- the present invention provides a work comfort evaluation apparatus that evaluates work comfort by measuring muscle activity during work performed by a pair of muscles of a human body provided symmetrically.
- An object of the present invention is to provide a work comfort evaluation device and a work comfort evaluation method that can evaluate work comfort from a short-time measurement result without controlling workers. Disclosure of the invention
- the present invention relates to a work comfort evaluation device that evaluates work comfort by measuring myoelectric potential during work performed by a pair of muscles of a human body provided symmetrically, the work comfort evaluation device comprising: A pair of detection sensors for detecting a myoelectric potential generated by a muscle activity of a human body at the time of work, of a pair of muscles arranged in a pair, an amplifier for amplifying a pair of myoelectric potentials detected by the detection sensor, and an amplified pair A waveform processing unit that generates a synchronous contraction waveform of the pair of muscles from a time-series waveform of the myoelectric potential of the pair, and intensity information of the generated synchronous contraction waveform, or frequency information included in a predetermined intensity range. And an evaluation unit that evaluates the level of work comfort, and a work comfort evaluation apparatus characterized by having:
- the evaluation unit calculates the intensity information or the frequency information of the generated synchronous contraction waveform at predetermined time intervals, and determines the degree of comfort of the work at predetermined time intervals based on the calculation result. It is preferable to evaluate.
- the waveform processing unit after full-wave rectification of the pair of myoelectric potential time-series waveforms, the smaller one of the values of the pair of myoelectric potential time-series waveforms at the same time.
- the value is the signal value of the synchronous contraction waveform.
- the waveform processing sound 15 is obtained by subjecting the amplified time-series waveforms of the pair of myoelectric potentials to standardization processing using the maximum myoelectric potential, and using the processed time-series waveforms to generate the synchronous contraction waveform. Generate Is preferred.
- the waveform processing unit may perform a full-wave rectification of the pair of myoelectric potential time-series waveforms, and then calculate an average value of signal values of the pair of myoelectric potential-time-series waveforms at the same time. It is similarly preferable to use the signal value of the synchronous contraction waveform.
- the work is, for example, a steering work in driving a vehicle.
- the pair of muscles is, for example, a deltoid muscle located on a shoulder of a human body.
- the present invention is a work comfort evaluation method for evaluating work comfort by measuring a myoelectric potential at the time of work performed by a pair of muscles of a human body symmetrically arranged, the method comprising: Synchronizing the pair of muscles from the step of detecting and amplifying myoelectric potentials of a pair of muscles arranged symmetrically due to muscle activity of the human body during work, and a time-series waveform of the amplified pair of myoelectric potentials Generating a dynamic contraction waveform; and evaluating the level of work comfort from intensity information of the generated synchronous contraction waveform or frequency information included in a predetermined intensity range.
- the strength information or the frequency information of the generated synchronous contraction waveform is calculated at predetermined time intervals, and the work is performed at predetermined time intervals based on the calculation result. It is preferable that the degree of comfort of the car be evaluated.
- the waveform processing unit normalizes the amplified time-series waveforms of the pair of myoelectric potentials using a maximum myoelectric potential, and processes the processed time-series waveforms.
- the synchronous contraction waveform is generated using
- the signals of the time-series waveforms of the pair of myoelectric potentials are subjected to full-wave rectification at the same time.
- the geometric mean value be the signal value of the synchronous contraction waveform.
- the work is, for example, a steering work in driving a vehicle.
- the pair of muscles is, for example, a deltoid muscle located on a shoulder of a human body.
- FIG. 1 is a schematic configuration diagram showing the configuration of a steering comfort evaluation device that is an example of the work comfort evaluation device of the present invention.
- FIG. 2 is a diagram for explaining a deltoid muscle in which a myoelectric potential is measured in the steering comfort evaluation device shown in FIG.
- FIG. 3 is a flowchart showing a flow of an example of the work comfort evaluation method of the present invention.
- FIGS. 4 (a) to (d) show examples of time-series waveforms obtained by the driving comfort evaluation device shown in FIG. 1, and
- FIG. 7 is a diagram for explaining the area that divides the time-series waveforms shown in FIGS. FIG.
- FIG. 5 is a diagram showing an example of a change in the RMS value of the synchronous contraction waveform obtained by the steering comfort evaluation device shown in FIG.
- FIG. 6 is a diagram illustrating an example of a result of an analysis of variance of an RMS value of a synchronous contraction waveform obtained by the driving comfort evaluation device shown in FIG. BEST MODE FOR CARRYING OUT THE INVENTION
- FIG. 1 is a schematic configuration diagram of a steering comfort evaluation apparatus 10 in which a work comfort evaluation apparatus of the present invention is applied to a driver's steering operation.
- the steering comfort evaluation device 10 is a device that evaluates the steering comfort of the driver who drives the vehicle.
- the detection sensors 12 and 14 detect the myoelectric potentials of the left and right deltoid muscles of the driver, and the electrodes 16 And an amplifier 18 for amplifying the myoelectric potentials from the detection sensors 12 and 14; and a processing unit 20 for evaluating the steering comfort level from the time-series waveforms of the amplified myoelectric potentials of the left and right deltoid muscles.
- a monitor 22 for monitoring and displaying the result.
- the detection sensor 12 is a sensor that detects the myoelectric potential of the deltoid muscle of the left shoulder of the driver.
- the skin surface electrode (for example, AgZAgCl dish electrode, Ag electrode or stainless steel electrode) is paired.
- the pair of skin surface electrodes are attached to the surface of the left shoulder where the deltoid muscle is located at a predetermined interval, for example, 2 cm.
- the detection sensor 14 is a sensor that detects the myoelectric potential of the deltoid muscle of the right shoulder of the driver.
- the detection sensor 14 is configured by forming a pair of skin surface electrodes. It is attached to the surface of the right shoulder where the deltoid muscle is located at a predetermined interval, for example, 2 cm.
- the driver is attached to the skin surface by rubbing with a scrub, removing dirt with alcohol, and using electrode glue.
- the electric resistance is 30 k Q (5 1 ?: ⁇ Recommended) Remove dirt until:
- the two electrodes are attached to the muscle belly of the muscle to be measured, parallel to the muscle fibers.
- the paste should be placed at a position P away from the end A of the acromion and three fingers away from the acromion in the longitudinal direction of the arm. .
- the electrode 16 is a ground electrode that is attached to the driver's ear lobe, which is an electrically inactive position, in order to keep the driver's potential constant, and accurately measures the detection sensors 12 and 14. Provided to do.
- the electrode 16 connected to the amplifier 18 is grounded via the amplifier 18.
- the amplifier 18 is a known operational amplifier that amplifies the myoelectric potential detected by the detection sensors 12 and 14.
- the myoelectric potential detected and amplified by the detection sensors 12 and 14 is sent to the processing unit 20.
- the processing unit 20 includes a waveform processing section 24 and a comfort evaluation section 26.
- the processing unit 20 is a unit configured by a computer, and the waveform processing unit 24 and the comfort evaluation unit 26 are configured to perform each function by executing a program.
- the waveform processing section 24 and the comfort evaluation section 26 may be configured by a dedicated circuit.
- the waveform processing unit 24 samples the time-series waveform of the myoelectric potential, performs full-wave rectification, and then uses the maximum myoelectric potential measured and stored in advance by the detection sensors 12 and 14. Calculate the index (Index) by normalizing each time-series waveform of myoelectric potential In addition, the part that outputs the waveform generated by selecting the smaller value of the standardized values of the EMG of the pair of left and right deltoid muscles at the same time and outputs it as a synchronous contraction waveform .
- the synchronous contraction waveform will be described later.
- the maximum myoelectric potential is the myoelectric potential when the driver applies a maximal load to the deltoid muscle to exert a muscle activity, and the maximum myoelectric potential is measured every time the detection sensors 12 and 14 are attached.
- the normalization of the time-series waveform of the myoelectric potential using the maximum myoelectric potential is that the electrical resistance of the detection sensors 12 and 14 changes delicately every time the detection sensors 12 and 14 are attached. This is because the magnitude of the myoelectric potential changes.
- the waveform processing section 24 may be configured to generate a synchronous contraction waveform having a signal value as a geometric average value of a pair of myoelectric potential signal values of the left and right deltoid muscles. In this case, there is no need to normalize and adjust the time-series waveforms of the left and right myoelectric potentials using the maximum myoelectric potential, and it is not necessary to measure the maximum myoelectric potential.
- the comfort evaluation unit 26 calculates intensity information at regular time intervals from the synchronous contraction waveform generated by the waveform processing unit 24, and evaluates the degree of driver's steering comfort based on the selection result. It is a part to do.
- the intensity information of the synchronous contraction waveform is, for example, an RMS (root leans suquare) value (effective value) of the synchronous contraction waveform calculated at predetermined time intervals, for example, at intervals of 0.1 to 0.5 seconds. , Integral value, or integral value of the envelope of the synchronous contraction waveform.
- frequency information of the synchronous contraction waveform may be calculated, and the comfort level of the steering may be evaluated based on the frequency information.
- the frequency information of the synchronous contraction waveform is, for example, the probability of the signal value of the synchronous contraction waveform falling within a predetermined RMS value range. And the number of times.
- the comfort evaluation unit 26 compares the RMS value of the synchronous contraction waveform with the set value of each stage that is set in advance to classify the driver's steering comfort in stages. Evaluate the degree of steering comfort. Also, by comparing the frequency information of the synchronous contraction waveform with the set probabilities of each stage set in advance to classify the driver's steering comfort stepwise, the degree of the driver's steering comfort is evaluated. I do.
- Such evaluation results are sent to the monitor 22 for display together with the synchronous contraction waveform and the time-series waveforms of the myoelectric potentials of the left and right deltoid muscles.
- the driving comfort evaluation device 10 generates a synchronous contraction waveform from the time-series waveforms of the myoelectric potentials of the left and right deltoid muscles, and uses the strength information or frequency information of the synchronous contraction waveform to provide the driver with the information. It is characterized by evaluating the steering comfort level.
- steering by a driver is performed by the operation of steering the steering wheel (steer) of the vehicle.
- the steering wheel is turned by turning the left hand holding the steering wheel upward.
- the left deltoid muscle contracts.
- the driver's right shoulder is relaxed because the right hand can only be attached to the steering wheel.
- the deltoid muscle of the driver's left shoulder relaxes and the deltoid muscle of the driver's right shoulder contracts.
- the driver's steering performed by contracting one muscle and relaxing the other muscle out of the pair of deltoid muscles provided in the human body symmetrically in the left-right symmetry is performed in accordance with the present invention. This corresponds to work performed by a pair of muscles in opposition.
- the pair of left and right deltoid muscles will oppose each other.
- the pair of left deltoid muscles also contracts in synchronization with the steering wheel.
- the waveform of the myoelectric potential at this time is called a synchronous contraction waveform.
- Such contraction of the deltoid muscle provides the driver with a force to hold the steering wheel.
- the force to hold the steering wheel is based on physical measurement data that shows the behavior of the vehicle by installing measurement sensors such as acceleration and load cells. Information that cannot be obtained.
- the inventors of the present application have found that it is possible to evaluate the easiness of steering of the steering wheel and the easiness of control by the steering based on the intensity and frequency of the synchronous contraction, and have reached the present invention.
- the detection sensors 12 and 14 When evaluating the driving comfort using such a driving comfort evaluation device 10, first, as shown in FIG. 3, the detection sensors 12 and 14 first detect the right and left deltoid muscles of the dryno. It is pasted on the shoulder surface located (step 100). At the same time, electrode 16 is attached to the earlobe.
- the maximum myoelectric potential when the driver contracts the deltoid muscles on both the left and right sides to the maximum is measured (step 102).
- the maximum myoelectric potential is sent to the waveform processing section 24 via the amplifier 18 and recorded and held. This makes it possible to standardize the myoelectric potential to be measured thereafter, and to keep constant the myoelectric potential information that changes every time the detection sensors 12 and 14 are attached.
- the driver starts driving the vehicle, the driver is steered, and the myoelectric potentials of the left and right deltoid muscles of the driver are constantly measured (step 104).
- the myoelectric potential is amplified by the amplifier 18 and then supplied to the waveform processing section 24.
- the time-series waveforms of the myoelectric potentials of the left and right deltoid muscles are all After the wave rectification is performed and a signal waveform whose value is all 0 or more is generated, the time-series waveform of the full-wave rectified myoelectric potential is normalized using the maximum stored myoelectric potential. Further, a synchronous contraction waveform is generated by using the smaller value of the two time-series rectified waveform values at the same time as the signal value of the synchronous contraction waveform (step 106). ).
- the RMS value of the synchronous contraction waveform is sequentially calculated at predetermined time intervals, for example, at intervals of 0.1 to 0.5 seconds in the comfort evaluation section 26 (step 108).
- the degree of comfort in the driver's steering is evaluated sequentially by comparing the degree of comfort with the set value of each step which is set in advance in order to classify the degree of comfort (step 110).
- the driver's comfort during the steering which changes every moment, can be controlled by measuring the myoelectric potential at the time of steering performed by a pair of deltoid muscles of the human body provided symmetrically. No evaluation is performed based on short-term measurement results.
- FIGS. 4 (a) to 4 (d) show examples of various time waveforms when the above method is performed.
- FIG. 4 (a) is an example of a time-series waveform of the steering angle of the steering wheel performed by the driver.
- Figs. 4 (b) and (c) show the time-series waveforms of the myoelectric potentials of the quadriceps muscles on the left and right sides of the driver when the steering wheel shown in Fig. 4 (a) is steered (the ratio to the maximum myoelectric potential). This is a full-wave rectified version of an example (Index)).
- FIG. 4 (d) shows an example of a synchronous contraction waveform (Index) generated from the time-series waveforms of the myoelectric potentials shown in Figs. 4 (b) and (c).
- Index synchronous contraction waveform
- the positive side of the steering angle indicates a state in which the steering wheel is steered to the right
- the negative side indicates a state in which the steering wheel is steered to the left side. Therefore, when the steering wheel is steered to the right, the contraction of the deltoid muscle on the left side is large as shown in Fig. 4 (c), and accordingly, as shown in Fig. 4 (b), The deltoid muscle shows that the muscle potential is hardly generated and the muscle is in a relaxed state or almost in a relaxed state.
- the waveform shown in FIG. 4 (c) is substantially selected.
- the waveform shown in FIG. 4 (b) is substantially selected.
- the RMS value of this waveform is sequentially obtained at predetermined time intervals, and it is necessary to classify the driver's steering comfort step by step in advance.
- the degree of the driver's steering comfort is evaluated by comparing with the set value of each set stage.
- Fig. 5 shows three types of vehicle turning characteristics: US (understeer), OS (oversteer), and NS (neutral steer).
- US understeer
- OS oversteer
- NS neutral steer
- the RMS value of the synchronous contraction waveform obtained under these conditions is shown in Fig. 5.
- Fig. 4 (e) the calculation results are shown in sections corresponding to the steering angles.
- Area S a is the area of the steering angle 0, realm region 1 ⁇ is increasing with time steering angle is positive, region L 2 is a region where the steering angle is reduced with positive at the time, the area L 3 is negative steering angle region where the absolute value increases with time in the region L 4 are regions where the steering angle is the absolute value decreases with a negative time, the area S b region of the steering angle 0, region and L 5 together with negative steering angle time Region where the absolute value increases, region L 6 For areas absolute value decreases with a negative steering angle time area L 7 is a region where the steering angle is increased with the positive at the time, the area L 8 is the steering angle is positive region decreases with time, the area S c is a region of the steering angle is 0.
- Fig. 4 (a) The steering shown in Fig. 4 (a) was repeated five times for each of the US, OS, and NS conditions, the RMS value of each area was determined, and analysis of variance was performed. Were examined to determine if there was a significant difference between the two.
- the US is one of the turning characteristics of the vehicle.When the turning speed of the vehicle is increased while the vehicle is traveling along an arc while maintaining a constant steering angle, This refers to the characteristic that the running bulges outward from the arc shape and the turning radius increases.
- the OS is one of the turning characteristics of the vehicle, and when the turning speed of the vehicle is increased while the vehicle is traveling along an arc while maintaining a constant steering angle, This refers to the characteristic in which traveling goes inward from the arc shape and the turning radius decreases.
- NS is one of the turning characteristics of the vehicle, and even if the turning speed of the vehicle is increased while the vehicle is traveling along an arc while maintaining a constant steering angle, Has the characteristic that it does not deviate from the arc shape and the turning radius does not change.
- Figure 5 is a region S a, ⁇ ⁇ , ⁇ ⁇ 2, shows ⁇ ⁇ ⁇ , RMS value of Sc the average value of (I nde x) OS, to another US and NS.
- Figure 6 shows the results of an analysis of variance at the 5% level using the obtained RMS values. ing. “Ku” and “>” in FIG. 6 indicate the magnitude relationship when the comparison pair has a significant difference.
- region 1 ⁇ , Te region L 3 and the region L 7 smell, RMS value of NS is smaller than the RMS value of the OS
- the region L, realm L 4 and region L 7 in, rather small as the RMS value of NS is compared to the RMS value of the US, even more, in the region L 3 and the region L 6, 1 ⁇ ternary 113 is small compared to 1 ⁇ [ternary Rei_3 Gawakatsu.
- the steering comfort can be appropriately evaluated by using the synchronous contraction waveform intensity information.
- the steering comfort level can be appropriately evaluated by using the frequency information included in the predetermined intensity range in the synchronous contraction waveform.
- the degree of comfort varying with time can be evaluated. For example, even if the comfort level is the best NS among US, ⁇ S, and NS, it is necessary to find a region where the RMS value increases and the comfort level deteriorates. This can be used for vehicle development and tire development in pursuit of steering comfort.
- the object of evaluating the degree of comfort is not limited to steering of the steering wheel in the present invention. Instead, any work may be performed as long as a pair of muscles of the human body provided symmetrically are performed in opposition.
- a pair of muscles of a human body provided symmetrically are measured for myoelectric potential at the time of work performed by antagonizing the pair of muscles, and a synchronous contraction waveform of the pair of muscles is generated. Since the level of work comfort is evaluated based on the strength information or frequency information of the synchronized contraction waveform, the work comfort can be determined from the measurement results in a short time without controlling the respiration for the worker as in the past. The degree can be evaluated.
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Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP03741479A EP1535570B1 (en) | 2002-07-22 | 2003-07-18 | Device and method for assessing driver comfort |
US10/522,023 US7532925B2 (en) | 2002-07-22 | 2003-07-18 | Apparatus and method of evaluating degree of work comfort |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
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JP2002-212681 | 2002-07-22 | ||
JP2002212681A JP4343502B2 (ja) | 2002-07-22 | 2002-07-22 | 作業快適度評価装置および作業快適度評価方法 |
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WO2004008957A1 true WO2004008957A1 (ja) | 2004-01-29 |
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PCT/JP2003/009154 WO2004008957A1 (ja) | 2002-07-22 | 2003-07-18 | 作業快適度評価装置および作業快適度評価方法 |
Country Status (4)
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US (1) | US7532925B2 (ja) |
EP (1) | EP1535570B1 (ja) |
JP (1) | JP4343502B2 (ja) |
WO (1) | WO2004008957A1 (ja) |
Cited By (2)
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WO2002088044A1 (en) | 2001-05-01 | 2002-11-07 | Owens Corning | Sized reinforcements, and materials reinforced with such reinforcements |
EP1632180A1 (en) * | 2004-09-07 | 2006-03-08 | The Yokohama Rubber Co., Ltd. | Workability evaluating apparatus, workability evaluating method, and workability evaluating program |
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JP4433739B2 (ja) | 2003-09-17 | 2010-03-17 | 横浜ゴム株式会社 | 作業中ストレス評価装置および作業中ストレス評価方法 |
JP4432420B2 (ja) | 2003-09-17 | 2010-03-17 | 横浜ゴム株式会社 | 作業快適度評価装置および作業快適度評価方法 |
JP4556738B2 (ja) * | 2005-03-29 | 2010-10-06 | 横浜ゴム株式会社 | 運転技量評価装置、運転負担効率報知装置、運転技量評価方法、および運転負担効率報知方法 |
US7313957B1 (en) * | 2006-06-15 | 2008-01-01 | The Yokohama Rubber Co., Ltd. | Apparatus, method and program for evaluating work characteristic |
US8117047B1 (en) | 2007-04-16 | 2012-02-14 | Insight Diagnostics Inc. | Healthcare provider organization |
US7854166B2 (en) | 2007-07-09 | 2010-12-21 | The Yokohama Rubber Co., Ltd. | Method for evaluating an instrument operating force |
JP4591541B2 (ja) | 2008-05-14 | 2010-12-01 | 横浜ゴム株式会社 | 車両の走行条件評価方法及びその評価装置 |
JP6199714B2 (ja) * | 2013-11-29 | 2017-09-20 | 株式会社デンソー | ストレス評価装置,及びプログラム |
US10583287B2 (en) | 2016-05-23 | 2020-03-10 | Btl Medical Technologies S.R.O. | Systems and methods for tissue treatment |
CN108742610A (zh) * | 2018-04-03 | 2018-11-06 | 吉林大学 | 一种实现肌电和主观相关联的转向舒适度评价方法 |
CN110155168B (zh) * | 2019-04-25 | 2021-08-24 | 吉林大学 | 基于驾驶员体感的车辆智能转向调节方法和系统 |
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- 2003-07-18 EP EP03741479A patent/EP1535570B1/en not_active Expired - Lifetime
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See also references of EP1535570A4 * |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2002088044A1 (en) | 2001-05-01 | 2002-11-07 | Owens Corning | Sized reinforcements, and materials reinforced with such reinforcements |
EP1632180A1 (en) * | 2004-09-07 | 2006-03-08 | The Yokohama Rubber Co., Ltd. | Workability evaluating apparatus, workability evaluating method, and workability evaluating program |
US7693572B2 (en) | 2004-09-07 | 2010-04-06 | The Yokohama Rubber Co., Ltd. | Workability evaluating apparatus, workability evaluating method, and workability evaluating program |
Also Published As
Publication number | Publication date |
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US7532925B2 (en) | 2009-05-12 |
JP4343502B2 (ja) | 2009-10-14 |
EP1535570A1 (en) | 2005-06-01 |
EP1535570A4 (en) | 2009-04-01 |
US20050277843A1 (en) | 2005-12-15 |
JP2004049622A (ja) | 2004-02-19 |
EP1535570B1 (en) | 2011-10-05 |
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