JP2010048722A - Vibration generation device, dynamic viscoelasticity measuring device, and dynamic viscoelasticity measuring method - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a vibration generation device and a dynamic viscoelasticity measuring device for dynamic viscoelasticity measurement capable of realizing miniaturization, weight reduction and cost reduction by simplifying the whole device, and to provide a dynamic viscoelasticity measuring method. <P>SOLUTION: This vibration generation device for generating rotational vibration for measuring a dynamic viscoelasticity is equipped with an actuator for performing linear operation by a driving force in the linear direction; a displacement enlarging mechanism for amplifying displacement of the linear operation by the actuator by utilizing the principle of leverage by arranging a point of effort on the actuator side; and a rotational operation conversion mechanism for converting displacement into rotational operation, and generating rotational vibration to an object for measuring the dynamic viscoelasticity, by being constituted so as to transmit the amplified displacement to a tangential direction of a circular section of a rotating shaft. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a vibration generating device, a dynamic viscoelasticity measuring device, and a dynamic viscoelasticity measuring method.

  Many substances, such as chemical products, daily necessities, agricultural products and processed foods, have both viscous and elastic properties, and dynamic viscoelasticity measurement is used to evaluate the mechanical properties of such substances. Necessary. The dynamic viscoelasticity measurement includes a measurement of stress when linear vibration is applied to an object and a measurement of torque when rotational vibration is applied to the object.

  Here, the translational rotational vibration converter described in Patent Document 1 is a drive mechanism that converts linear vibration into rotational vibration by expansion and contraction of a torsion spring, and is opposed to the first and second opposingly twisted in opposite directions. The tip portions of the spring members are interconnected so as to rotate integrally around the spring axis when a minute vibration is applied in the axial direction.

  The device described in Patent Document 2 is a torsional vibration type dynamic viscoelasticity measuring device, and is a mechanism that generates rotational vibration by limited driving from an intermediate arm attached to a rotating shaft.

  In addition, the devices described in Patent Documents 3 to 5 generate rotational vibrations using voice coil motors (VCMs) arranged radially with respect to the rotational axis, or generate rotational vibrations about the rotational axis by electromagnetic induction. It is related with the mechanism to make.

JP-A-5-79541 Japanese Patent Publication No. 2-3135 JP 2007-171111 A Japanese Patent Publication No. 1-50315 JP 2002-219414 A

  However, in the mechanical vibration conversion mechanism described in Patent Document 1, an actuator material located in the middle of two opposing spring members generates rotational vibration, and thus shearing or twisting is generated on the object. Thus, there is a problem that the displacement cannot be transmitted and cannot be applied to the dynamic viscoelasticity measurement.

  In addition, in the vibration generating devices described in Patent Documents 2 to 5, since an electromagnetic driving force (electromagnetic repulsive force or attractive force) by a coil, a permanent magnet, or the like disposed on the rotating shaft is used, the device of the device is used to obtain a large driving force. I could not escape the increase in size. In other words, the conventional vibration generating apparatus that performs rotational vibration has a problem that the entire apparatus becomes complicated and cannot be increased in size and cost.

  The present invention has been made in view of the above, and by simplifying the entire apparatus, it is possible to achieve a reduction in size, weight, and price, a vibration generating apparatus for dynamic viscoelasticity measurement, An object of the present invention is to provide a dynamic viscoelasticity measuring device and a dynamic viscoelasticity measuring method.

  In order to achieve such an object, the vibration generating apparatus of the present invention is a vibration generating apparatus that generates rotational vibration for dynamic viscoelasticity measurement, and includes an actuator that performs a linear operation with a linear driving force, and a force point. A displacement magnifying mechanism that amplifies the displacement of the linear motion of the actuator and utilizes the principle of the lever arranged on the actuator side, and the amplified displacement is transmitted in the tangential direction of the circular section of the rotating shaft And a rotational motion conversion mechanism that converts the displacement into a rotational motion and generates the rotational vibration with respect to the object of the dynamic viscoelasticity measurement.

  According to the present invention, an actuator that performs a linear motion with a linear driving force, a displacement enlarging mechanism that amplifies the displacement of the linear motion of the actuator by using a lever principle with a force point on the actuator side, and an amplification By configuring the displacement to be transmitted in the tangential direction of the circular cross section of the rotating shaft, the displacement is converted into a rotational motion, and rotational vibration is generated for the object of dynamic viscoelasticity measurement. It is possible to provide a vibration generating device that can realize a reduction in size, weight, and price.

  The vibration generator of the present invention is characterized in that, in the vibration generator described above, the actuator generates the driving force by a piezo element, a giant magnetostrictive element, or a voice coil motor.

  According to the present invention, since the actuator generates a driving force by a piezo element, a giant magnetostrictive element, or a voice coil motor, the rotational vibration used for the viscoelasticity measurement using a small and light linear motion actuator having a large driving force. This can reduce the overall size and weight of the apparatus.

  In addition, the vibration generating device of the present invention is configured such that, in the vibration generating device described above, the piezo element is pressed in accordance with a force around the rotation axis of the rotating operation so that a charge signal from the piezo element can be read. Thus, a torque meter for measuring the torque generated around the rotation shaft is further provided.

  According to the present invention, the piezoelectric element is pressed in accordance with the force around the rotational axis of the rotational operation, and the charge signal from the piezoelectric element is configured to be readable, thereby measuring the torque generated around the rotational axis. Since the meter is provided, the torque for dynamic viscoelasticity measurement can be measured using a small torque meter utilizing the piezoelectric effect.

  The vibration generation device of the present invention is the vibration generation device described above, wherein at least the actuator, the displacement enlarging mechanism, and the rotational motion conversion mechanism are integrated, or at least the rotational motion conversion mechanism and the above A unit integrated with a torque meter is configured to be detachable.

  According to this invention, since at least the actuator, the displacement magnifying mechanism, and the rotational motion conversion mechanism are integrated, or at least the rotational motion conversion mechanism and the torque meter are integrated, it is configured to be detachable. A unit having another mechanism can be installed instead of the unit.

  Further, the vibration generating device of the present invention is configured such that when the unit is removed, the displacement amplified by the displacement enlarging mechanism is transmitted in a direction perpendicular to the circular cross section. The apparatus further includes a unit including at least a linear motion conversion mechanism that converts the displacement into a linear motion to generate a linear vibration with respect to the object.

  According to the present invention, when the integrated unit is removed, the displacement amplified by the displacement enlarging mechanism is transmitted in the direction perpendicular to the circular cross section, whereby the displacement is linearly detected. Since it further includes a unit that includes at least a linear motion conversion mechanism that converts the motion into a linear vibration with respect to the object, the linear vibration generating drive amplifier can be shared. Both linear vibration type viscoelasticity measurement by measuring stress when linear vibration is applied and rotational vibration type viscoelasticity measurement by measuring torque when rotational vibration is applied to the object Can be provided. In addition, since a conventional configuration for linear vibration type viscoelasticity measurement can be used, development cost and price can be suppressed.

  The vibration generating device of the present invention is the above-described vibration generating device, wherein the unit that integrates at least the actuator, the displacement magnifying mechanism, and the rotational motion converting mechanism is moved in the direction of the object. And a position sensor that measures the amount of movement by the moving mechanism.

  According to this invention, the moving mechanism that moves the unit in which at least the actuator, the displacement enlarging mechanism, and the rotational motion conversion mechanism are integrated in the direction of the object, and the position sensor that measures the amount of movement by the moving mechanism, Furthermore, since it provided, it can position suitably in order to transmit a vibration with respect to the installation surface of a target object, and it becomes possible to measure the value of thickness important in order to measure dynamic viscoelasticity.

  Further, the present invention is a dynamic viscoelasticity measuring device connected to a vibration generating device and including at least a control unit, the vibration generating device including an actuator that performs a linear operation by a linear driving force, a power point Is disposed on the actuator side, utilizing a lever principle, a displacement enlarging mechanism that amplifies the displacement of the linear motion of the actuator, and the amplified displacement is transmitted in the tangential direction of the circular section of the rotating shaft. By configuring, according to the rotational motion conversion mechanism that converts the displacement into rotational motion and generates rotational vibration for the object of dynamic viscoelasticity measurement, and the force around the rotational axis of the rotational motion A torque meter for measuring the torque generated around the rotation axis by pressing the piezoelectric element and configuring the charge signal from the piezoelectric element to be readable. The control unit is an inverse function x = function θ = f (x) obtained by formulating the relationship between the displacement amount x of the linear motion of the actuator and the rotational angle θ of the rotational motion converted by the rotational motion conversion mechanism. Based on g (θ), the operation function calculating means for calculating the operation function x = g (sin ωt) of the actuator for generating the rotational vibration of the desired sine wave sin ωt, and the operation function calculating means Based on the motion function x = g (sin ωt), the actuator control means for controlling the voltage for driving the actuator and the sine wave sin ωt generated by the control of the actuator control means, A dynamic viscoelasticity calculator that calculates the dynamic viscoelasticity of the object by reading the torque waveform measured by a torque meter. And a step.

  According to the present invention, the inverse function x = g () of the function θ = f (x) obtained by formulating the relationship between the displacement amount x of the linear motion of the actuator and the rotational angle θ of the rotational motion converted by the rotational motion conversion mechanism. Based on θ), an actuator operation function x = g (sin ωt) for generating a rotational vibration of a desired sine wave sin ωt is calculated. Based on the calculated operation function x = g (sin ωt), the actuator is The dynamic viscoelasticity value of the object is calculated by controlling the voltage for driving and reading the waveform of the torque measured by the torque meter in association with the sine wave sin ωt generated by the actuator control. A conventional dynamic viscoelasticity measuring device equipped with a linear vibration generating drive amplifier, actuator drive unit, analysis control unit, etc. for linear vibration type viscoelasticity measurement can be used. It is possible to construct a dynamic viscoelasticity measuring apparatus having both the functions of both the line vibrating viscoelasticity measurement and rotational vibration type viscoelasticity measuring.

  Further, the dynamic viscoelasticity measuring apparatus of the present invention is the dynamic viscoelasticity measuring apparatus described above, wherein the vibration generating device is a unit in which the actuator, the displacement enlarging mechanism, and the rotational motion converting mechanism are integrated. And a position sensor that measures the amount of movement by the moving mechanism, and the control unit installs the object using the position sensor. And a thickness measuring means for measuring the thickness of the object by measuring the amount of movement between the position and the position where it is not installed.

  Further, according to the present invention, since the thickness of the object is measured by measuring the amount of movement between the position where the object is installed and the position where the object is not installed using the position sensor, the dynamic viscoelasticity is measured. It is possible to measure the thickness of an important object.

  The present invention is also a dynamic viscoelasticity measurement method that is executed in a dynamic viscoelasticity measurement apparatus that is connected to the vibration generation apparatus and includes at least a control unit, wherein the vibration generation apparatus is driven in a linear direction. An actuator that performs linear motion by force, a displacement enlarging mechanism that amplifies the displacement of the linear motion of the actuator by using a lever principle by placing a force point on the actuator side, and the amplified displacement is A rotational motion converting mechanism that converts the displacement into a rotational motion and generates a rotational vibration with respect to an object for dynamic viscoelasticity measurement by being configured to be transmitted in a tangential direction of a circular cross section, and the rotational motion The piezoelectric element is pressed in accordance with the force around the rotation axis and the charge signal from the piezoelectric element is configured to be readable so that the torque generated around the rotation axis is measured. A torque meter, and the relationship between the displacement x of the linear motion of the actuator and the rotational angle θ of the rotational motion converted by the rotational motion conversion mechanism, which is executed in the control unit The operation function x = g (sin ωt) of the actuator for generating the rotational vibration of the desired sine wave sin ωt is calculated based on the inverse function x = g (θ) of the function θ = f (x). A function calculation step, an actuator control step for controlling a voltage for driving the actuator based on the motion function x = g (sin ωt) calculated in the motion function calculation step, and control in the actuator control step. The torque wave measured by the torque meter in association with the generated sine wave sinωt. A dynamic viscoelasticity calculation step of calculating a dynamic viscoelasticity value of the object by reading a shape.

  According to the present invention, the inverse function x = g () of the function θ = f (x) obtained by formulating the relationship between the displacement amount x of the linear motion of the actuator and the rotational angle θ of the rotational motion converted by the rotational motion conversion mechanism. Based on θ), an actuator operation function x = g (sin ωt) for generating a rotational vibration of a desired sine wave sin ωt is calculated. Based on the calculated operation function x = g (sin ωt), the actuator is The dynamic viscoelasticity value of the object is calculated by controlling the voltage for driving and reading the waveform of the torque measured by the torque meter in association with the sine wave sin ωt generated by the actuator control. In a conventional dynamic viscoelasticity measuring apparatus equipped with a linear vibration generation drive amplifier, actuator drive unit, analysis control unit, etc. for linear vibration type viscoelasticity measurement, It is possible to perform sex measurement.

  In the dynamic viscoelasticity measuring method of the present invention, the vibration generating device moves the unit in which the actuator, the displacement enlarging mechanism, and the rotational motion converting mechanism are integrated in the direction of the object. And a position sensor that measures the amount of movement by the moving mechanism, and the position sensor is used to execute a position between the position where the object is installed and the position where the object is not installed. It further includes a thickness measuring step of measuring the thickness of the object by measuring the amount of movement.

  Further, according to the present invention, since the thickness of the object is measured by measuring the amount of movement between the position where the object is installed and the position where the object is not installed using the position sensor, the dynamic viscoelasticity is measured. It is possible to measure the thickness of an important object.

  According to the present invention, by simplifying the entire apparatus, it is possible to achieve downsizing, weight reduction, and price reduction, a vibration generating device for dynamic viscoelasticity measurement, a dynamic viscoelasticity measuring device, and A dynamic viscoelasticity measuring method can be provided.

  Hereinafter, embodiments of a vibration generating apparatus, a dynamic viscoelasticity measuring apparatus, and a dynamic viscoelasticity measuring method for measuring dynamic viscoelasticity according to the present invention will be described in detail with reference to the drawings. Note that the present invention is not limited to the embodiments.

[Outline of the present invention]
Hereinafter, the outline of the present invention will be described, and then the configuration and processing of the present invention will be described in detail. Here, FIG. 1 is a front view showing an example of the configuration of the vibration generating device according to the embodiment of the present invention, and FIG. 2 is a cross-sectional view of the rotational motion conversion mechanism of the vibration generating device.

  As shown in FIG. 1, the vibration generating device according to the present embodiment of the present invention includes an actuator 10 that performs a linear motion by a linear driving force, and a displacement enlarging mechanism 20 that amplifies the displacement of the linear motion of the actuator 10. And a rotational motion conversion mechanism 30 that converts the amplified displacement into a rotational motion and generates rotational vibration with respect to the object of dynamic viscoelasticity measurement.

  Here, as the actuator 10, for example, a piezoelectric element (piezoelectric element), a giant magnetostrictive element, or a voice coil motor can be used.

  As shown in FIG. 1, the displacement magnifying mechanism 20 of the vibration generating device uses the principle of an insulator in which a force point is arranged on the actuator 10 side and an action point is arranged on the rotational motion conversion mechanism 30 side. Thereby, even when the displacement of the actuator 10 is small, a large displacement can be transmitted to the measurement target.

  As shown in FIGS. 1 and 2, the rotational motion conversion mechanism 30 amplifies the displacement by transmitting the displacement amplified by the displacement magnifying mechanism 20 in the tangential direction of the circular cross section of the rotation shaft 32 by the intermediate arm 31. Convert the displacement to rotational motion. As a result, when the actuator 10 is extended, a tangential drive is applied to the rotary shaft 32, resulting in a rotational drive force. Here, when the amount of displacement increases, the fixed portion of the intermediate arm 31 and the rotary shaft 32 is displaced from the operation line of the intermediate arm 31. Therefore, the intermediate arm 31 is preferably made of an elastic material (leaf spring) that can be bent. Etc.) may be used. In addition, the rotational motion conversion mechanism 30 is not limited to this example. In addition to transmitting the amplified displacement using friction without fixing the intermediate arm to the rotation shaft, the intermediate arm is configured as a rack gear, By configuring the rotating shaft in contact as a pinion gear, the amplified displacement may be transmitted in the tangential direction of the circular cross section of the rotating shaft.

  Further, in this vibration generating apparatus, a unit in which at least the actuator 10, the displacement magnifying mechanism 20 and the rotational motion converting mechanism 30 are integrated or a unit in which at least the rotational motion converting mechanism 31 and the torque meter are integrated is attached and detached. You may comprise, and when the said unit is extracted, you may further provide the unit which contains the linear motion conversion mechanism 40 at least. Here, FIG. 3 is a front view showing an example of a vibration generating device to which the linear motion conversion mechanism 40 is attached.

  As shown in FIG. 3, the linear motion conversion mechanism 40 is configured to transmit the displacement amplified by the displacement magnifying mechanism 20 in a direction perpendicular to the circular cross section, thereby converting the displacement into a linear motion. Thus, linear vibration is generated with respect to the object.

  The above is the outline of the present invention. Here, the vibration generating device presses the piezo element according to the force around the rotation axis of the rotation operation, and is configured to be able to read the charge signal from the piezo element, thereby generating the torque generated around the rotation axis. You may provide the torque meter to measure. The vibration generating apparatus further includes a moving mechanism that moves a unit in which at least the actuator 10, the displacement enlarging mechanism 20, and the rotational motion converting mechanism 30 (or the linear motion converting mechanism 40) are integrated in the direction of the object. You may provide, and may further provide the position sensor which measures the movement amount by a moving mechanism.

[Configuration of viscoelasticity measurement system]
First, the configuration of a viscoelasticity measurement system provided with the vibration generating device in the present embodiment will be described. FIG. 4 is a block diagram showing an example of the configuration of the viscoelasticity measurement system to which the present invention is applied, and conceptually shows only the portion related to the present invention.

  As shown in FIG. 4, the viscoelasticity measurement system schematically includes a vibration generation device 100 that generates vibration in the object 5, a voltage application device 200 that applies a voltage to the actuator 10 of the vibration generation device 100, and A charge amplifier device 400 that increases the generated charge is connected to a viscoelasticity measuring device 500 that controls the voltage application device 200 and obtains charge data from the charge amplifier device 400. In the description of the configuration and processing of the viscoelasticity measurement system (particularly, the viscoelasticity measurement device 500, the voltage application device 200, and the charge amplifier device 400) in the present embodiment, mainly rotational vibration type viscoelasticity measurement is performed. However, the present embodiment is not limited to this, and by using the same physical configuration and applying the logical configuration and processing method described in Japanese Patent Laid-Open No. 2008-29111, linear vibration can be obtained. It can also be configured to perform a formula viscoelasticity measurement. Here, FIG. 5 is a diagram illustrating an example of a rotational motion type unit for rotational vibration viscoelasticity measurement. FIG. 6 is a diagram showing an example of a linear motion type unit for linear vibration viscoelasticity measurement.

  The vibration generating device 100 for rotational vibration type viscoelasticity measurement is configured to include an actuator 10, a displacement magnifying mechanism 20, a rotational motion conversion mechanism 30, and a torque meter 50 when performing rotational vibration type viscoelasticity measurement. The In the present embodiment, as shown in FIG. 5, the actuator 10, the displacement enlarging mechanism 20, the rotational motion conversion mechanism 30, and the torque meter 50 are integrally configured as a rotational motion type unit 110. When performing the linear vibration type viscoelasticity measurement, the rotary motion type unit 110 is removed, and the actuator 10, the displacement magnifying mechanism 20, the linear motion conversion mechanism 40, and the stress sensor 60 are integrated as shown in FIG. The linear motion type unit 120 configured as can be attached.

  When the rotational motion type unit 110 including the rotational motion conversion mechanism 30 is attached, as shown in FIG. 5, the vibration generating device 100 amplifies the displacement of the actuator 10 that performs linear motion by the principle of the lever, One end of the plate-like intermediate arm 31 is installed at both action ends of the scissors-like displacement enlarging mechanism 10 that applies the same amount of displacement toward the inside, and the other end of each intermediate arm 31 is the center of the scissor angle. The left and right intermediate arms 31 are fixed alternately above and below the rotary shaft 32 having an axis on the line. Here, when the actuator 10 that performs the linear operation is extended, the rotation shaft 32 is driven in the tangential direction to generate a rotational driving force. Here, since the fixed portion of the intermediate arm 31 and the rotary shaft 32 is displaced from the operation line of the intermediate arm 31 when the amount of displacement increases, a resilient material (such as a leaf spring) that can be bent is used for the intermediate arm 31. On the other hand, when the linear motion type unit 120 provided with the linear motion conversion mechanism 40 is attached, the displacement amplified by the displacement magnifying mechanism 20 is transmitted in the axial direction of the vibration transmission shaft 42 as shown in FIG. By configuring, the displacement is converted into a linear motion, and a linear vibration is generated with respect to the object (see JP 2008-29111 A).

  As shown in FIG. 5, the vibration generation device 100 includes a torque meter 50 when rotational vibration viscoelasticity measurement is performed using the rotational motion conversion mechanism 30 to generate rotational vibration. As shown in FIG. 5, the torque meter 50 is installed on the axis of the rotating shaft 32 in the vicinity of the middle between the object side and the fixed end side of the intermediate arm 31. 7 to 11 are a perspective view, a front view, a side view, a horizontal sectional view, and a vertical sectional view of the torque meter 50 in the present embodiment. As shown in FIGS. 7 to 11, the upper and lower rotary shafts 51, 52 of the torque meter 50 are respectively fixed to members (sensor holder 55) constituting one of the pressure contact surfaces that press the piezoelectric element 53 from both sides. The piezo element 53 is brought into pressure contact according to the force around the rotation axis generated between the upper and lower rotary shafts 51, 52, and the charge amplifier device from the piezo element 53 can read the charge signal from the piezo element 53 generated by the piezoelectric effect. 400 is wired by a cable 54. Then, by analyzing the charge signal amplified by the charge amplifier device 400 with the viscoelasticity measuring device 500, the torque generated around the rotation axis can be measured.

  Here, when the torque is measured in the rotational vibration type viscoelasticity measurement, the configuration of the torque meter is not limited to the torque meter 50 described above, and as shown in FIG. 5, the torque meter configured by the piezoelectric element 2 functioning as a sensor. 56 may be used to measure torque. That is, as shown in FIG. 5, two stacked piezo elements 1 and 2 are connected in series in the direction of occurrence of displacement via an intermediate, and one stacked piezo element 1 applies a voltage. The other stacked piezo element 2 may be configured to function as a sensor by generating a piezoelectric charge due to a pressure change inside the piezo element. JP, 2008-29111, A).

  On the other hand, as shown in FIG. 6, the vibration generating apparatus 100 includes a stress sensor 60 when performing linear vibration viscoelasticity measurement by generating linear vibration using the linear motion conversion mechanism 40. The stress sensor 60 is installed near the middle between the object side and the fixed end side of the intermediate arm 41 on the axis of the vibration transmission shaft 42 to the object of the linear motion conversion mechanism 40. Here, FIG. 12 to FIG. 16 are a perspective view, a front view, a side view, an enlarged central view, and a horizontal sectional view of the stress sensor 60. As shown in FIGS. 12 to 16, the stress sensor 60 sandwiches the piezo element between the upper sensor holder 61 and the lower pusher 62, and responds to the force in the moving direction of the linear motion generated between the sensor holder 61 and the pusher 62. Then, the piezoelectric element 63 is pressed against the piezoelectric element 63, and the charge signal from the piezoelectric element 63 generated by the piezoelectric effect is read from the piezoelectric element 63 to the charge amplifier device 400 by the cable 64. The charge amplifier device 400 and the viscoelasticity measuring device 500 can be used in common with the case where rotational vibration type viscoelasticity measurement is performed. As in the case of rotational vibration viscoelasticity measurement, the configuration of the stress sensor is not limited to the stress sensor 60 described above. As shown in FIG. 6, the piezoelectric element 2 is subjected to linear vibration viscoelasticity measurement. It can be used as the stress sensor 65.

  Here, FIG. 17 and FIG. 18 are a front perspective view and a rear perspective view showing an example of the overall configuration of the vibration generating apparatus 100 in the present embodiment. Here, the voltage application device 200 and the charge amplifier device 400 may be provided in the overall configuration.

  As shown in FIGS. 17 and 18, the vibration generating apparatus 100 can open the actuator cover 102 by loosening the actuator cover fixing screw 101, and the above-described rotational motion type unit 110 and linear motion type unit 120 are connected. It is configured so that it can be replaced. Further, the object is placed on the stage 103 and fixed by the sample presser 104 so that the object and the plunger 105 can be brought into contact with each other. The illustrated USB connector 106 is used to connect to the viscoelasticity measuring apparatus 500. Here, FIG. 19 is a diagram illustrating an example of the configuration of the actuator lifting knob 70, the position sensor 80, and the moving mechanism 90 of the vibration generating device 100.

  As shown in FIG. 19, by rotating the actuator lifting / lowering knob 70, the plunger 105, which is a member in contact with the target object (sample) by the rotary motion type unit 110 or the linear motion type unit 120, is attached to the target object. Therefore, the moving mechanism 90 has a rack and pinion structure inside the structure so that it can be moved up and down to an appropriate position. Further, the amount of movement by the moving mechanism 90 can be measured by a position sensor 80 constituted by an angle sensor or the like.

  Returning to the description of FIG. 4 again, the voltage applying device 200 is a voltage applying means that is connected to the viscoelasticity measuring device 500 and the actuator 10 and applies a voltage to the actuator 10 in accordance with the control of the viscoelasticity measuring device 500.

  The charge amplifier device 400 is a charge amplifying unit that amplifies the charge generated from the piezoelectric element. That is, when the rotational motion type unit 110 is attached to the vibration generating device 100, the charge amplifier device 400 amplifies the piezoelectric charge generated in the piezo element 53 in the torque meter 50, and the linear motion type unit 120 is attached. If so, the piezoelectric charge generated in the piezoelectric element 63 in the stress sensor 60 is amplified, and the amplified charge signal is transmitted to the viscoelasticity measuring device 500. In addition, the charge amplifier device 400 may amplify the piezoelectric charges generated at both ends of the piezoelectric element 2 and transmit the amplified charge signal to the viscoelasticity measuring device 500 (Japanese Patent Laid-Open No. 2008-29111). See the official gazette). Further, the charge amplifier device 400 amplifies the induced charges generated at both ends of the piezo element 1 (actuator 10) when the displacement amount is measured in the viscoelasticity measuring device 500 in order to reduce or correct the hysteresis characteristic and the creep characteristic. May be transmitted to the elasticity measuring apparatus 500 (see the same publication).

  Next, an outline of the viscoelasticity measuring apparatus 500 connected to the vibration generating apparatus 100 will be described. First, the basic principle of viscoelasticity measurement using this viscoelasticity measurement system will be described.

  The principle of dynamic viscoelasticity measurement suitable for quality evaluation of viscoelastic materials will be described. In dynamic viscoelasticity measurement, stress from a material is detected by a load cell while applying a sinusoidal waveform distortion to the material, and the storage elastic modulus and loss elastic modulus, which are indicators of dynamic viscoelasticity, are determined from the distortion waveform and the stress waveform. Measure etc. Thereby, various information necessary for advanced quality control regarding the characteristics of the material can be obtained. Specifically, it is possible to obtain information on a wide range of properties related to physical properties such as viscosity, elasticity, and structural properties of materials. From the obtained information, time change (time change) characteristics and temperature change characteristics (temperature dispersion, strain dispersion, Advanced analysis such as frequency dispersion). The dynamic viscoelasticity measurement is a non-destructive measurement because it is measured by microdeformation, and both solid and liquid materials can be measured.

  FIG. 20 is a block diagram illustrating an example of a logical configuration of the viscoelasticity measuring apparatus 500 in the present embodiment. In the description of the configuration and processing of the viscoelasticity measuring apparatus 500 in the present embodiment, a case where rotational vibration type viscoelasticity measurement is performed will be described, but the embodiment of the viscoelasticity measuring apparatus 500 is not limited thereto, By applying the logical configuration and processing method described in Japanese Patent Laid-Open No. 2008-29111, it is possible to configure as a viscoelasticity measuring device having both functions of rotational vibration type viscoelasticity measurement and linear vibration type viscoelasticity measurement. it can.

  As shown in FIG. 20, the viscoelasticity measuring apparatus 500 generally includes a control unit 502 such as a CPU that controls the entire viscoelasticity measuring apparatus 500 in an integrated manner, and an input / output interface connected to input means and output means. A unit 508 and a storage unit 506 for storing various databases and tables are configured, and these units are communicably connected via an arbitrary communication path.

  Here, various databases and tables (such as relational function file 506a and operation function file 506b) stored in the storage unit 506 are storage means such as a fixed disk device, and various programs, tables, and files used for various processes. And store databases.

  Among these components of the storage unit 506, the relation function file 506a formulates the relationship between the displacement amount x of the linear motion of the actuator 10 and the rotational angle θ of the rotational shaft 32 converted by the rotational motion conversion mechanism 30. It is relational function storage means for storing the function θ = f (x).

  Further, the motion function file 506b is a motion function x of the actuator 10 for generating a rotational vibration of a desired sine wave sin ωt calculated based on an inverse function x = g (θ) of the function θ = f (x). = G (sinωt) is an operation function storage means for storing.

  In FIG. 20, an input / output interface unit 508 controls input means and output means. Here, as the output means, in addition to a monitor (including a home television), a speaker can be used. As the input means, a keyboard, a mouse, a microphone, and the like can be used.

  In FIG. 20, the control unit 502 has a control program such as an OS (Operating System), a program that defines various processing procedures, and an internal memory for storing necessary data. Information processing for executing various processes is performed. The control unit 502 includes an operation function calculation unit 502a, an actuator control unit 502b, a dynamic viscoelasticity calculation unit 502c, and a thickness measurement unit 502d in terms of functional concept.

  Among these, the motion function calculation unit 502a is a function θ = f (x) obtained by formulating the relationship between the displacement amount x of the linear motion of the actuator 10 and the rotational angle θ of the rotational shaft 32 converted by the rotational motion conversion mechanism 30. Is an operation function calculation means for calculating an operation function x = g (sin ωt) of an actuator for generating a rotational vibration of a desired sine wave sin ωt on the basis of an inverse function x = g (θ).

  The actuator controller 502b is an actuator controller that controls a voltage for driving the actuator 10 based on the operation function x = g (sin ωt) calculated by the operation function calculator 502a.

  Further, the dynamic viscoelasticity value calculation unit 502c correlates with the sine wave sin ωt generated by the control of the actuator control unit 502b, and displays the torque waveform measured by the torque meter 50 or the torque meter 56 (piezo element 2). It is a dynamic viscoelasticity value calculation means for calculating a dynamic viscoelasticity value of an object by reading. The dynamic viscoelasticity value calculation unit 502c acquires, as an elastic response, the component of the torque waveform measured by the torque meter 50 or the torque meter 56 (piezo element 2) that is in phase with the generated sine wave sin ωt, A dynamic viscoelastic value such as an elastic coefficient or a viscosity coefficient is calculated by acquiring a torque waveform component that is a phase advanced by π / 2 from the phase of the generated sine wave sin ωt as a viscous response. Here, the dynamic viscoelasticity value calculation unit 502c may calculate the dynamic viscoelasticity value in consideration of the thickness measured by the thickness measurement unit 502d.

  The thickness measuring unit 502d is a thickness measuring unit that measures the thickness of the object by using the position sensor 80 to measure the amount of movement between the position where the object is installed and the position where the object is not installed. For example, the thickness measuring unit 502d measures the thickness of the object by measuring the amount of movement from the position where the plunger 105 is in contact with the stage 103 to the position where it is in contact with the object via the position sensor 80.

  This is the end of the description of the viscoelasticity measurement system configuration.

[Processing of viscoelasticity measurement system]
Next, an example of processing of the viscoelasticity measurement system according to the present embodiment configured as described above will be described in detail with reference to FIGS.

[Basic processing]
First, basic processing of the viscoelasticity measuring apparatus 500 in the viscoelasticity measuring system will be described. FIG. 21 is a flowchart showing an example of basic processing of the viscoelasticity measuring apparatus 500.

  As shown in FIG. 21, first, the viscoelasticity measuring apparatus 500 performs a linear motion displacement amount x of the actuator 10 and a rotational angle of the rotary shaft 32 converted by the rotational motion conversion mechanism 30 by the processing of the motion function calculation unit 502a. The relation with θ is formulated into a mathematical expression, and the mathematical relation function θ = f (x) is stored in the relational function file 506a (step SA-1).

  Then, the viscoelasticity measuring apparatus 500 obtains an inverse function x = g (θ) of the relational function θ = f (x) stored in the relational function file 506a by the processing of the motion function calculation unit 502a, and the inverse function x = g From (θ), the operation function x = g (sin ωt) of the actuator 10 for generating the rotational vibration of the desired sine wave sin ωt is calculated and stored in the operation function file 506b (step SA-2).

  The viscoelasticity measuring apparatus 500 causes the voltage applying apparatus 200 to apply a voltage to the actuator 10 based on the operation function x = g (sin ωt) stored in the operation function file 506b by the processing of the actuator control unit 502b. Then, a drive signal is transmitted to the voltage application device 200 (step SA-3). Here, the viscoelasticity measuring apparatus 500 may measure the thickness of the object by the position sensor 80 when the object is placed on the stage 103 by the processing of the thickness measuring unit 502d.

  The viscoelasticity measuring apparatus 500 associates the torque meter 50 or the torque meter 56 (piezo element 2) with the sine wave sinωt generated by the control of the actuator control unit 502b by the processing of the dynamic viscoelasticity value calculation unit 502c. ) Is measured (step SA-4).

  Then, the viscoelasticity measuring apparatus 500 performs an elastic component having the same phase as the sine wave sinωt and a viscous component advanced by π / 2 phase from the sine wave sinωt from the measured torque waveform by the processing of the dynamic viscoelasticity value calculation unit 502c Then, dynamic viscoelasticity values such as an elastic coefficient and a viscosity coefficient are calculated (step SA-5). Here, the dynamic viscoelasticity value calculation unit 502c may calculate the dynamic viscoelasticity value in consideration of the thickness of the object measured by the thickness measurement unit 502d.

  The above is an example of the basic processing of the viscoelasticity measuring apparatus 500. Here, FIG. 22 is a principle diagram showing the principle of separating the calculated stress (torque) into an elastic stress component and a viscous stress component. As shown in FIG. 22, the elastic response has the same phase as the input displacement, but the viscous response has a displacement of π / 2 phase from the displacement. That is, elasticity is proportional to the magnitude of displacement, and when the amount of displacement is maximum, the elastic response is maximized (Hooke's law), but viscosity is proportional to the speed of displacement, and the displacement speed is maximized. Sometimes the (+ π / 2) elastic response is maximized (Newton's law). Therefore, in a viscoelastic material, the observed stress waveform is a composite waveform, and the phase changes depending on the ratio of the viscous response to the elastic response. That is, in the dynamic viscoelasticity measurement, it is possible to separately evaluate the viscosity and elasticity by utilizing the fact that a phase difference is generated in the response between the elastic component and the viscous component when sinusoidal vibration is applied to the substance. In addition, when calculating dynamic viscoelasticity values, such as a viscosity coefficient and an elastic coefficient, you may calculate using viscoelastic dynamics models, such as a Maxwell model and a Voigt model.

[Operation function calculation processing]
Next, details of the motion function calculation process will be described with reference to FIGS. FIG. 23 is a graph showing the relationship between the drive signal x and the rotation angle θ. FIG. 24 is a flowchart showing an example of operation function processing in the viscoelasticity measuring apparatus 500. In this embodiment, the nonlinearity between the drive signal x and the rotation angle θ is corrected. However, the present invention is not limited to this. For example, the induced charge generated in the piezo element 1 functioning as the actuator 10 is detected and displaced. The amount x may be measured to correct the nonlinearity between the displacement amount x and the rotation angle θ.

  As shown in FIG. 23, assuming a linear viscoelastic behavior, the resulting torque is also a sine wave for an applied sine wave displacement. However, even if the drive signal x for controlling the applied voltage is given in a sine waveform, the actually generated torque may not be a sine wave. That is, between the drive signal x for controlling the voltage application device 200 to apply a voltage to the actuator 10 and the rotation angle θ of the rotational operation converted from the linear displacement of the actuator 10 by the control of the drive signal x, There may be non-linearity. Therefore, in order to cause the vibration generating device 100 to generate an appropriate sinusoidal rotational vibration, it is necessary to correct the non-linearity.

  As shown in FIG. 24, in the viscoelasticity measuring apparatus 500, first, the motion function calculation unit 502a generates a drive signal x corresponding to the sine wave sin ωt based on x = sin ωt and is generated. Torque is measured through the torque meter 50 or the torque meter 56 (piezo element 2), and the torque waveform is analyzed (step SB-1).

  Then, the operation function calculation unit 502a functionalizes the relationship between the drive signal x and the rotation angle θ of the rotation operation based on the sine waveform of the output drive signal x and the measured torque waveform, and the relationship function θ = f (x ) And is stored in the relational function file 506a (step SB-2).

  Then, the motion function calculation unit 502a obtains an inverse function x = g (θ) of the relation function θ = f (x) stored in the relation function file 506a (step SB-3).

  Then, the motion function calculation unit 502a calculates the motion function x = g (sin ωt) of the actuator 10 for generating the rotational vibration of the desired sine wave sin ωt based on the inverse function x = g (θ). It is stored in the function file 506b (step SB-4). That is, the operation function x = g (sin ωt) is a function that gives a sinusoidal wave output drive signal x in which nonlinearity is corrected.

  The above is an example of the motion function calculation process. In the subsequent processing, the actuator control unit 502b outputs the drive signal x based on the operation function x = g (sin ωt) stored in the operation function file 506b, and the dynamic viscoelasticity value calculation unit 502c generates The dynamic viscoelasticity measurement is executed by reading the torque waveform in association with the sine wave sinωt and calculating the dynamic viscoelasticity value of the object (step SB-5). This completes the description of the motion function calculation process.

[Dynamic viscoelasticity measurement mode]
According to the viscoelasticity measurement system in the present embodiment, when linear vibration is applied to an object, linear vibration type viscoelasticity measurement by measuring stress and when rotational vibration is applied to the object And rotational vibration viscoelasticity measurement by measuring torque. Here, FIG. 25 is a diagram showing an object (liquid, solid) that can be measured by the viscoelasticity measurement system and various measurement methods of linear vibration type viscoelasticity measurement or rotational vibration type viscoelasticity measurement.

  As shown in FIG. 25, according to this viscoelasticity system, shear (liquid, solid), compression (solid) is measured in linear vibration type viscoelasticity measurement by appropriately changing the shape of the plunger 105 in contact with the object. ), Tension (solid), bending (solid), and various tests of shear (liquid) and twist (solid) can be performed in the linear vibration viscoelasticity measurement.

  In particular, rotational vibration type viscoelasticity measurement using a parallel disk type, a cone plate type, and a double cylindrical type (coaxial cylindrical type) can be performed on a liquid object.

When the rotational vibration viscoelasticity measurement is performed by the parallel disk method, the dynamic viscoelasticity value calculation unit 502c obtains the shear storage elastic modulus G ′ and the shear loss elastic modulus G ″ by the following expression (1) (JIS standard K7244 -10: 2005 (ISO standard 6721-10: 1999) 8.2 "Calculation of complex shear modulus and complex shear viscosity").
G ′ = 32 dT ₀ · cos δ / (θ ₀ πD ⁴ )
G ″ = 32 dT ₀ · sin δ / (θ ₀ πD ⁴ ) (1)
(Where d is the distance between the disks (m), T ₀ is the torque amplitude, δ is the phase difference (rad), θ ₀ is the angular displacement amplitude, and D is the diameter of the disk.)

Here, the dynamic viscoelasticity value calculation unit 502c may calculate G ′ and G ″ based on the following formula (2) using the shape factor b that is a constant based on the measurement mode and the sample shape. .
G ′ = (f / (bx)) · cos δ
G ″ = (f / (bx)) · sin δ Equation (2)
(Where f is the stress amplitude and x is the displacement amplitude.)
It should be noted that T ₀ = f and θ ₀ = x at the rotation amplitude, and b = πD ⁴ / 32d in the case of the parallel disk type.

In addition, when performing rotational vibration viscoelasticity measurement using a cone plate method, the dynamic viscoelasticity value calculation unit 502c obtains G ′ and G ″ by the following equation (3).
G ′ = 3αT ₀ · cos δ / (2θ ₀ πR ³ )
G ″ = 3αT ₀ · sin δ / (2θ ₀ πR ³ ) (3)
(Where R is the radius, α is the angle between the cone and the plate, T ₀ is the torque amplitude, and θ ₀ is the angular displacement amplitude.)

Here, in the case of the cone plate type, the dynamic viscoelasticity value calculation unit 502c may obtain G ′ and G ″ based on the above-described formula (2) using the following shape factor b.
b = 2πR ³ / 3α [cm ³ ]
In this case, the maximum shear stress S = 3T ₀ / (2πR ³ ), and the maximum shear strain γ = θ ₀ / α.

Further, in the case of performing rotational vibration type viscoelasticity measurement by a double cylindrical type (coaxial cylindrical type), the dynamic viscoelasticity value calculation unit 502c obtains G ′ and G ″ by the following formula (3).
G ′ = (1 / R ₁ ² −1 / R ₂ ² ) T ₀ · cos δ / (4θ ₀ πL)
G ″ = (1 / R ₁ ² −1 / R ₂ ² ) T ₀ · sin δ / (4θ ₀ πL)
... Formula (4)
(Where, L is length, R ₁ and R ₂ are each radius, T ₀ of the double cylinder amplitude of torque, theta ₀ is the amplitude of the angular displacement.)

Here, when the dynamic viscoelasticity value calculation unit 502c is based on the double cylindrical type (coaxial cylindrical type), G ′ and G ″ are based on the above-described formula (2) using the following shape factor b. You may ask for.
b = 4πL / (1 / R ₁ ² −1 / R ₂ ² ) [cm ³ ]
In this case, the maximum shear stress S = T ₀ / (2πLR ₁ ² ), and the maximum shear strain γ = 2R ₂ ² θ ₀ / (1 / R ₂ ² −1 / R ₁ ² ).

  Moreover, rotational vibration type viscoelasticity measurement can be performed on a solid object (columnar sample, strip-shaped sample) as described below.

That is, when torsional measurement is performed on an object of a cylindrical sample, the dynamic viscoelasticity value calculation unit 502c obtains G ′ and G ″ by the following equation (5) (see JIS standard K7244-7).
G ′ = 2LT ₀ · cos δ / (θ ₀ πR ⁴ )
G ″ = 2LT ₀ · sin δ / (θ ₀ πR ⁴ ) (5)
(Here, R is the radius of the cylindrical sample, and L is the distance between the clamps.)

Here, the dynamic viscoelasticity value calculation unit 502c, when performing torsional measurement on an object of a cylindrical sample, uses the following shape factor b and based on the above-described equation (2), G ′ and G ″ may be obtained.
b = πR ⁴ / 2L

Further, when the torsional measurement is performed on the object of the strip-shaped sample, the dynamic viscoelasticity calculation unit 502c obtains G ′ and G ″ by the following formulas (6) and (7) (JIS standard K7244- 7).
(I) If 0 <d / w <0.6,
G ′ = 3LT ₀ · cos δ / (θ ₀ wd ³ (1−0.63 d / w))
G ″ = 3LT ₀ · sin δ / (θ ₀ wd ³ (1−0.63 d / w))
... Formula (6)
(Ii) When 0.6 ≦ d / w ≦ 1,
G ′ = 3L (1 + d ² / w ² ) T ₀ · cos δ / (0.843θ ₀ wd ³ )
G ″ = 3L (1 + d ² / w ² ) T ₀ · sin δ / (0.843θ ₀ wd ³ )
... Formula (7)
(W is the width of the strip sample, d is the thickness of the strip sample, and L is the distance between the clamps.)

Here, when the torsional measurement is performed on the object of the strip-shaped sample, the dynamic viscoelasticity value calculation unit 502c uses the following shape factor b, based on the above-described equation (2), G ′ and G ″ may be obtained.
(I) If 0 <d / w <0.6,
b = wd ³ (1-0.63d / w) / 3L
(Ii) When 0.6 ≦ d / w ≦ 1,
b = 0.843 wd ³ / (3L (1 + d ² / w ² ))

  This is the end of the description of the viscoelasticity measurement system in the present embodiment.

[Other embodiments]
Although the embodiments of the present invention have been described so far, the present invention can be applied to various different embodiments in addition to the above-described embodiments within the scope of the technical idea described in the claims. May be implemented.

  In particular, in addition to the above-described embodiments, the configuration and processing method described in Japanese Patent Laid-Open No. 2008-29111 are appropriately applied to perform rotational vibration type viscoelasticity measurement and linear vibration type viscoelasticity measurement. May be.

  Moreover, although the case where the viscoelasticity measuring apparatus 500 performs processing in a stand-alone form has been described as an example, the processing is performed in response to a request from a client terminal configured in a separate housing from the viscoelasticity measuring apparatus 500, You may comprise so that the process result may be returned to the said client terminal.

  In addition, among the processes described in the embodiment, all or part of the processes described as being automatically performed can be performed manually, or the processes described as being performed manually can be performed. All or a part can be automatically performed by a known method.

  In addition, unless otherwise specified, the processing procedures, control procedures, specific names, information including registration data for each processing, parameters such as search conditions, screen examples, and database configurations shown in the above documents and drawings Can be changed arbitrarily.

  In addition, regarding the viscoelasticity measuring apparatus 500, each illustrated component is functionally schematic and does not necessarily need to be physically configured as illustrated.

  For example, the processing functions provided in each device of the viscoelasticity measuring device 500, in particular, the processing functions performed by the control unit 502, are all or any part of the processing functions interpreted by a CPU (Central Processing Unit) and the CPU. It can be realized by a program to be executed, or can be realized as hardware by wired logic. The program is recorded on a recording medium to be described later, and is mechanically read by the viscoelasticity measuring apparatus 500 as necessary. That is, a storage unit 506 such as a ROM or an HD stores a computer program for performing various processes by giving instructions to the CPU in cooperation with an OS (Operating System). This computer program is executed by being loaded into the RAM, and constitutes a control device in cooperation with the CPU.

  The computer program may be stored in an application program server connected to the viscoelasticity measuring apparatus 500 via an arbitrary network, and may be downloaded in whole or in part as necessary. It is.

  The program according to the present invention can also be stored in a computer-readable recording medium. Here, the “recording medium” refers to any “portable physical medium” such as a flexible disk, a magneto-optical disk, a ROM, an EPROM, an EEPROM, a CD-ROM, an MO, and a DVD, or a LAN, WAN, or Internet. It includes a “communication medium” that holds the program in a short period of time, such as a communication line or a carrier wave when the program is transmitted via a network represented by

  The “program” is a data processing method described in an arbitrary language or description method, and may be in any format such as source code or binary code. The “program” is not necessarily limited to a single configuration, but is distributed in the form of a plurality of modules and libraries, or in cooperation with a separate program represented by an OS (Operating System). Including those that achieve the function. Note that a well-known configuration and procedure can be used for a specific configuration for reading a recording medium, a reading procedure, an installation procedure after reading, and the like in each device described in the embodiment.

  Various databases (such as relational function file 506a and operation function file 506b) stored in the storage unit 506 are storage means such as a memory device such as a RAM and a ROM, a fixed disk device such as a hard disk, a flexible disk, and an optical disk. .

  The viscoelasticity measuring apparatus 500 is connected to an information processing apparatus such as a known personal computer or workstation, and software (including programs, data, etc.) for realizing the method of the present invention is installed in the information processing apparatus. May be realized.

  Furthermore, the specific form of distribution / integration of the devices is not limited to the one shown in the figure, and all or a part thereof is configured to be functionally or physically distributed / integrated in an arbitrary unit according to various additions. can do.

  As described above in detail, according to the present invention, the vibration generating device for dynamic viscoelasticity measurement can be realized by simplifying the entire device, thereby achieving downsizing, weight reduction, and price reduction. , A dynamic viscoelasticity measuring device and a dynamic viscoelasticity measuring method, and an industrial field where it is required to evaluate mechanical properties and processability of chemical products, daily necessities, agricultural products, processed foods, etc. Can be used.

It is a front view which shows an example of a structure of the vibration generation apparatus in embodiment of this invention. It is sectional drawing in the rotational motion conversion mechanism of a vibration production | generation apparatus. It is a front view which shows an example of the vibration production | generation apparatus to which the linear motion conversion mechanism 40 was attached. It is a block diagram which shows an example of this viscoelasticity measurement system structure to which this invention is applied. It is a figure which shows an example of the rotational motion type unit for rotational vibration type viscoelasticity measurement. It is a figure which shows an example of the linear motion type | mold unit for a linear vibration type viscoelasticity measurement. It is a perspective view of torque meter 50 in this embodiment. It is a front view of the torque meter 50 in this Embodiment. It is a side view of the torque meter 50 in this Embodiment. It is a horizontal sectional view of torque meter 50 in this embodiment. It is a vertical sectional view of torque meter 50 in the present embodiment. 3 is a perspective view of a stress sensor 60. FIG. 3 is a front view of a stress sensor 60. FIG. 3 is a side view of a stress sensor 60. FIG. FIG. 4 is an enlarged view of a central part of a stress sensor 60. 3 is a horizontal sectional view of the stress sensor 60. FIG. It is a front perspective view which shows an example of the whole structure of the vibration generation apparatus 100 in this Embodiment. It is a back perspective view showing an example of the whole composition of vibration generating device 100 in this embodiment. 3 is a diagram illustrating an example of a configuration of an actuator lifting knob 70, a position sensor 80, and a moving mechanism 90 of the vibration generating device 100. FIG. It is a block diagram which shows an example of a logic structure of the viscoelasticity measuring apparatus 500 in this Embodiment. 5 is a flowchart showing an example of basic processing of the viscoelasticity measuring apparatus 500. It is a principle figure which shows the principle which isolate | separates into the elastic stress component and the viscous stress component from the calculated stress (torque). It is a graph which shows the relationship between the drive signal x and rotation angle (theta). 5 is a flowchart showing an example of operation function processing in the viscoelasticity measuring apparatus 500. It is a figure which shows various measuring methods of the target object (liquid, solid) measurable with this viscoelasticity measurement system, and a linear vibration type viscoelasticity measurement or a rotational vibration type viscoelasticity measurement.

Explanation of symbols

1 Piezo element (actuator)
2 Piezo elements (sensors)
DESCRIPTION OF SYMBOLS 5 Object 10 Actuator 20 Displacement expansion mechanism 30 Rotation motion conversion mechanism 31 Intermediate arm 32 Rotating shaft 40 Linear motion conversion mechanism 41 Intermediate arm 42 Vibration transmission shaft 50 Torque meter 51, 52 Rotary shaft 53 Piezo element 54 Cable 55 Sensor holder 56 Torque Meter 60 Stress sensor 61 Sensor holder 62 Pusher 63 Piezo element 64 Cable 65 Stress sensor 70 Actuator lifting knob 80 Position sensor 90 Moving mechanism 100 Vibration generator 101 Actuator cover fixing screw 102 Actuator cover 103 Stage 104 Sample holder 105 Plunger 106 USB connector DESCRIPTION OF SYMBOLS 110 Rotation operation type unit 120 Linear operation type unit 200 Voltage application apparatus 400 Charge amplifier Location 500 viscoelasticity measuring apparatus 502 control unit 502a operating function calculating section 502b actuator control unit 502c dynamic viscoelasticity value calculator 502d thickness measuring unit 506 storage unit 506a relationship function file 506b behavior function file 508 output interface unit

Claims (10)

In a vibration generator that generates rotational vibration for dynamic viscoelasticity measurement,
An actuator that performs a linear motion with a driving force in a linear direction;
Displacement expansion mechanism that amplifies the displacement of the linear motion of the actuator by using a lever principle by placing a force point on the actuator side;
By constructing the amplified displacement so as to be transmitted in the tangential direction of the circular cross section of the rotating shaft, the displacement is converted into a rotational motion, and the rotational vibration is applied to the object of the dynamic viscoelasticity measurement. A rotational motion conversion mechanism to be generated;
A vibration generating apparatus comprising: The vibration generating device according to claim 1,
The actuator is
Generating the driving force by a piezo element, a giant magnetostrictive element, or a voice coil motor;
A vibration generator characterized by the above. In the vibration generating device according to claim 1 or 2,
A torque meter that measures the torque generated around the rotation axis by pressing the piezo element according to the force around the rotation axis of the rotation operation and configured to be able to read a charge signal from the piezo element;
The vibration generating device further comprising: In the vibration generating device according to any one of claims 1 to 3,
A unit in which at least the actuator, the displacement enlarging mechanism, and the rotational motion conversion mechanism are integrated, or a unit in which at least the rotational motion conversion mechanism and the torque meter are integrated is configured to be removable.
A vibration generator characterized by the above. The vibration generating device according to claim 4,
When the above unit is removed,
The displacement amplified by the displacement enlarging mechanism is configured to be transmitted in a direction perpendicular to the circular cross section, thereby converting the displacement into a linear motion and generating a linear vibration with respect to the object. A unit having at least a linear motion conversion mechanism,
The vibration generating device further comprising: In the vibration generating device according to any one of claims 1 to 5,
A moving mechanism for moving a unit in which at least the actuator, the displacement enlarging mechanism, and the rotational motion converting mechanism are integrated in the direction of the object;
A position sensor for measuring the amount of movement by the moving mechanism;
The vibration generating device further comprising: A dynamic viscoelasticity measuring device connected to a vibration generating device and comprising at least a control unit,
The vibration generator is
An actuator that performs a linear motion with a driving force in a linear direction;
Displacement expansion mechanism that amplifies the displacement of the linear motion of the actuator by using a lever principle by placing a force point on the actuator side;
By constructing the amplified displacement so as to be transmitted in the tangential direction of the circular cross section of the rotation shaft, the displacement is converted into a rotational motion, and rotational vibration is generated for the object for dynamic viscoelasticity measurement. A rotational motion conversion mechanism;
A torque meter that measures the torque generated around the rotation axis by pressing the piezo element in accordance with the force around the rotation axis of the rotation operation and configured to be able to read a charge signal from the piezo element;
With
The control unit
The inverse function x = g (θ) of the function θ = f (x) obtained by mathematically expressing the relationship between the displacement amount x of the linear motion of the actuator and the rotational angle θ of the rotational motion converted by the rotational motion conversion mechanism. An operation function calculating means for calculating an operation function x = g (sin ωt) of the actuator for generating the rotational vibration of the desired sine wave sin ωt based on
Actuator control means for controlling a voltage for driving the actuator based on the action function x = g (sin ωt) calculated by the action function calculating means;
The dynamic viscoelasticity value for calculating the dynamic viscoelasticity value of the object is read by reading the waveform of the torque measured by the torque meter in association with the sine wave sin ωt generated by the control of the actuator control means. Elastic value calculation means;
A dynamic viscoelasticity measuring apparatus comprising: The dynamic viscoelasticity measuring device according to claim 7,
The vibration generator is
A moving mechanism for moving a unit in which at least the actuator, the displacement enlarging mechanism, and the rotational motion converting mechanism are integrated in the direction of the object;
A position sensor for measuring the amount of movement by the moving mechanism;
Is further provided,
The control unit
A thickness measuring means for measuring the thickness of the object by measuring the amount of movement between the position where the object is installed and the position where the object is not installed using the position sensor;
An apparatus for measuring dynamic viscoelasticity, further comprising: A dynamic viscoelasticity measurement method that is executed in a dynamic viscoelasticity measurement apparatus that is connected to a vibration generator and includes at least a control unit,
The vibration generator is
An actuator that performs a linear motion with a driving force in a linear direction;
Displacement expansion mechanism that amplifies the displacement of the linear motion of the actuator by using a lever principle by placing a force point on the actuator side;
By constructing the amplified displacement so as to be transmitted in the tangential direction of the circular cross section of the rotation shaft, the displacement is converted into a rotational motion, and rotational vibration is generated for the object for dynamic viscoelasticity measurement. A rotational motion conversion mechanism;
A torque meter that measures the torque generated around the rotation axis by pressing the piezo element in accordance with the force around the rotation axis of the rotation operation and configured to be able to read a charge signal from the piezo element;
With
Executed in the control unit,
The inverse function x = g (θ) of the function θ = f (x) obtained by mathematically expressing the relationship between the displacement amount x of the linear motion of the actuator and the rotational angle θ of the rotational motion converted by the rotational motion conversion mechanism. An operation function calculating step of calculating an operation function x = g (sin ωt) of the actuator for generating the rotational vibration of a desired sine wave sin ωt based on
An actuator control step for controlling a voltage for driving the actuator based on the motion function x = g (sin ωt) calculated in the motion function calculating step;
The dynamic viscoelasticity value for calculating the dynamic viscoelasticity value of the object is read by reading the waveform of the torque measured by the torque meter in association with the sine wave sin ωt generated by the control in the actuator control step. An elastic value calculation step;
A dynamic viscoelasticity measuring method comprising: The dynamic viscoelasticity measuring method according to claim 9,
The vibration generator is
A moving mechanism for moving a unit in which at least the actuator, the displacement enlarging mechanism, and the rotational motion converting mechanism are integrated in the direction of the object;
A position sensor for measuring the amount of movement by the moving mechanism;
Is further provided,
Executed in the control unit,
A thickness measuring step of measuring the thickness of the object by measuring the amount of movement between the position where the object is installed and the position where the object is not installed using the position sensor;
A dynamic viscoelasticity measuring method, further comprising:

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