Measuring device and measuring method

Abstract

The measuring device comprises: a contact (140) for contacting a measuring object; a sensor (150) arranged on the contact (140) for measuring at least a surface state of the measuring object; a driving unit (170) for displacing the contact (140) and the sensor (150) relative to the measuring object; and a vibration isolation component arranged between the driving unit (170) and the contact (140) and the sensor (150) for isolating vibration from the driving unit (170) to the contact (140) and the sensor (150). The measuring device measures the surface state based on the measurement value of the sensor (150).

Description

Technical Field

[0001] The present invention relates to a measuring device and a measuring method. Background Art

[0002] One of the important elements of cosmetics is the sensory value. The sensory value of cosmetics refers to the value based on the effect on the user's sensory perception when using the cosmetics. For example, if the use of cosmetics improves the texture of the skin and the user can feel satisfied, the sensory value of the cosmetics is considered to be high.

[0003] In order to add sensory value to cosmetics, it is necessary to achieve "good touch" based on sensory engineering. Therefore, it is necessary to accurately measure the surface conditions of the skin that vary depending on the user (age / habits) and surrounding environment (time / place).

[0004] Conventionally, the state of the skin is measured by palpation. In addition, a device for quantitatively evaluating the touch is known (Patent Document 1).

[0005] Prior art literature

[0006] Patent Literature

[0007] Patent Document 1: Japanese Patent Application Publication No. 2016-038317 Summary of the invention

[0008] Problems to be solved by the present invention

[0009] However, since the measurement based on palpation is a subjective judgment, it is not possible to stably measure the surface condition of the skin. The conventional tactile evaluation device itself is large and it is difficult to easily measure the human skin.

[0010] In view of the above circumstances, an object of one embodiment of the present invention is to provide a measuring device that stably measures the surface state of skin associated with the sense of touch.

[0011] Means used to solve problems

[0012] The measuring device of the present invention includes: a contact, which is used to contact the measuring object; a sensor, which is arranged on the above-mentioned contact and is used to measure at least the surface state of the above-mentioned measuring object; a driving part, which is used to displace the above-mentioned contact and the above-mentioned sensor relative to the above-mentioned measuring object; and a vibration isolation component, which is arranged between the above-mentioned driving part and the above-mentioned contact and the above-mentioned sensor, and is used to isolate the vibration from the above-mentioned driving part to the above-mentioned contact and the above-mentioned sensor. The measuring device measures the surface state based on the measurement value of the above-mentioned sensor.

[0013] Effects of the Invention

[0014] It is possible to provide a measuring device that can stably measure the surface condition of the skin associated with the sense of touch. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 This is an overall configuration diagram of an example of the measuring device according to the first embodiment.

[0016] Figure 2 This is a side view of a detection unit of an example of the measurement device according to the first embodiment.

[0017] Figure 3 This is a perspective view of a detection unit of an example of the measurement device according to the first embodiment.

[0018] Figure 4 It is a diagram for explaining the structure of the distal end portion of an example of the measuring device according to the first embodiment.

[0019] Figure 5A It is a diagram for explaining an upper support member of an example of the measuring device according to the first embodiment.

[0020] Figure 5B It is a diagram for explaining an upper support member of an example of the measuring device according to the first embodiment.

[0021] Figure 5C It is a diagram for explaining an upper support member of an example of the measuring device according to the first embodiment.

[0022] Figure 5D It is a diagram for explaining an upper support member of an example of the measuring device according to the first embodiment.

[0023] Fig. 6A This is a diagram for explaining measurement results of an example of the measurement device according to the first embodiment.

[0024] Figure 6B This is a diagram for explaining measurement results of an example of the measurement device according to the first embodiment.

[0025] Figure 6C This is a diagram for explaining measurement results of an example of the measurement device according to the first embodiment.

[0026] Fig. 7A This is a diagram for explaining a usage example of an example of the measuring device according to the first embodiment.

[0027] Figure 7B This is a diagram for explaining a usage example of an example of the measuring device according to the first embodiment.

[0028] Figure 7CThis is a diagram for explaining a usage example of an example of the measuring device according to the first embodiment.

[0029] Fig.7D This is a diagram for explaining a usage example of an example of the measuring device according to the first embodiment.

[0030] Fig. 8A This is a diagram for explaining a usage example of an example of the measuring device according to the first embodiment.

[0031] Figure 8B This is a diagram for explaining a usage example of an example of the measuring device according to the first embodiment.

[0032] Figure 8C This is a diagram for explaining a usage example of an example of the measuring device according to the first embodiment.

[0033] Fig. 9A This is a diagram for explaining a usage example of an example of the measuring device according to the first embodiment.

[0034] Fig. 9B This is a diagram for explaining a usage example of an example of the measuring device according to the first embodiment.

[0035] Fig. 9C This is a diagram for explaining a usage example of an example of the measuring device according to the first embodiment.

[0036] Fig.10 This is a diagram for explaining the weight of the plug portion according to the first embodiment.

[0037] Fig.11 This is an overall configuration diagram of an example of a measuring device according to the second embodiment.

[0038] Fig.12 This is a front view of a detection unit of an example of a measurement device according to the second embodiment.

[0039] Fig.13 This is a side view of a detection unit of an example of a measurement device according to the second embodiment.

[0040] Fig.14 This is a perspective view of a detection unit of an example of a measurement device according to the second embodiment.

[0041] Fig.15 It is a cross-sectional view of a detection unit of an example of the measurement device according to the second embodiment.

[0042] Fig.16 It is a cross-sectional view of a detection section of a modified example of the measurement device according to the second embodiment.

[0043] Fig.17It is an overall configuration diagram of an example of a measuring device according to the third embodiment.

[0044] Fig.18 This is a perspective view of a detection unit of an example of a measurement device according to a third embodiment.

[0045] Fig.19 It is a cross-sectional view of a detection unit of an example of a measurement device according to the third embodiment.

[0046] Fig. 20 This is a perspective view of a detection unit of an example of a measurement device according to a fourth embodiment.

[0047] Fig.21 This is a diagram showing the internal structure of a detection unit of an example of a measurement device according to a fourth embodiment.

[0048] Fig. 22 This is a perspective view of a detection unit of an example of a measurement device according to a fifth embodiment.

[0049] Fig.23 This is a diagram showing the internal structure of a detection unit of an example of a measurement device according to the fifth embodiment.

[0050] Fig.24 This is a perspective view of a detection unit of an example of a measurement device according to the sixth embodiment.

[0051] Fig.25 It is a diagram showing calculation results of an example of the measuring device according to the seventh embodiment.

[0052] Fig.26 It is a diagram showing calculation results of an example of the measuring device according to the seventh embodiment.

[0053] Fig. 27 It is a diagram showing calculation results of an example of the measuring device according to the seventh embodiment.

[0054] Fig.28 It is a diagram showing calculation results of an example of the measuring device according to the seventh embodiment.

[0055] Fig.29 It is a diagram showing calculation results of an example of the measuring device according to the seventh embodiment.

[0056] Fig.30 It is a diagram showing calculation results of an example of the measuring device according to the seventh embodiment.

[0057] Fig.31 It is a diagram showing calculation results of an example of the measuring device according to the seventh embodiment.

[0058] Fig.32It is a diagram showing calculation results of an example of the measuring device according to the seventh embodiment.

[0059] Fig.33 It is a diagram showing calculation results of an example of the measuring device according to the seventh embodiment.

[0060] Fig.34 It is a diagram showing calculation results of an example of the measuring device according to the seventh embodiment.

[0061] Fig.35 It is a diagram showing calculation results of an example of the measuring device according to the eighth embodiment.

[0062] Fig.36 It is a diagram showing calculation results of an example of the measuring device according to the eighth embodiment. DETAILED DESCRIPTION

[0063] Hereinafter, a mode for implementing the present invention will be described with reference to the drawings. It should be noted that in this specification and the drawings, components having substantially the same configuration are denoted by the same reference numerals, and repeated descriptions are omitted.

[0064] <<First Implementation Method>>

[0065] <Measurement Device 1>

[0066] A first embodiment will be described. Figure 1 This is an overall configuration diagram of an example of a measuring device according to this embodiment.

[0067] The measuring device 1 of this embodiment includes a detection unit 100 and a control device 200. The detection unit 100 and the control device 200 are connected by a cable, etc. As described in detail below, the measuring device 1 of this embodiment measures the surface state of the skin associated with the touch, for example, whether the surface of the skin is smooth.

[0068] <Detection Unit 100>

[0069] First, the detection unit 100 will be described.

[0070] Figure 2 It is a side view of the detection unit 100 which is an example of the measurement device of this embodiment. Figure 3 It is a perspective view of a detection unit 100 which is an example of the measurement device according to the present embodiment.

[0071] The detection unit 100 of the measurement device 1 of this embodiment includes a main body 110 and a tip 120. The detection unit 100 measures the surface state of the skin by pressing the tip 120 against the skin of a measurement object, such as a wrist or cheek of a person, in the direction of arrow P. The tip 120 rotates in the direction of arrow R around the rotation axis A.

[0072] The main body 110 includes a substantially cylindrical shell 111. The main body 110 includes a driving unit 170 for rotating the top end 120 inside the shell 111. That is, the main body 110 includes a shell 111 for housing the driving unit 170. The shell 111 is shaped to a size that a measurer can hold. The measurer performs measurement by holding the main body 110. The measurer holds the main body 110 and moves it toward the measurement object, thereby pressing the top end 120 against the measurement object. It should be noted that the main body 110 can be mounted on, for example, a robot arm to perform measurement.

[0073] The main body 110 and the distal end 120 are connected by the connecting shaft 130 that rotates under the action of the driving unit 170. In this way, the main body 110 and the distal end 120 are connected by the connecting shaft 130. It should be noted that the connecting shaft 130 is an example of a connecting member.

[0074] The tip portion 120 includes a contact 140 and a sensor 150 .

[0075] The contactor 140 is a member of the measuring device 1 for contacting the measured object. The contact surface 141 of the contactor 140 contacts the measured object. The contact surface 141 of the contactor 140 may be a flat surface or may have irregularities on the surface depending on the measured object and the purpose of measurement.

[0076] The measuring object contacts the contact 140, and the top end portion 120 rotates in the direction of the arrow R, thereby generating vibration. For example, when the surface roughness of the measuring object is large, the vibration becomes larger. On the other hand, when the surface roughness of the measuring object is small, the vibration becomes smaller. The material of the contact 140 is a metal such as stainless steel, copper, or brass. By setting the material of the contact 140 to metal, the vibration generated in a wider frequency band, especially a high frequency band, can be transmitted to the sensor 150. It should be noted that the material of the contact 140 can be set to an elastomer such as rubber. By setting the material of the contact 140 to an elastomer, for example, it is possible to simulate vibrations propagating along a finger.

[0077] The sensor 150 is a sensor for measuring the surface state of the measurement object. The sensor 150 of this embodiment is a vibration sensor. The sensor 150 is provided on the surface (back surface 142) of the contact 140 opposite to the contact surface 141. Figure 5CAs a vibration sensor, for example, a three-axis acceleration sensor is used. The sensor 150 rotates the top end 120 so that the contact 140 contacts the measurement object and generates displacement, and the generated vibration is detected. The sensor 150 is connected to the control device 200 through a cable or the like. The control device 200 detects the signal from the sensor 150 to obtain the measurement value.

[0078] The structure of the distal end portion 120 will be described. Figure 4 This is a diagram for explaining the structure of a distal end portion 120 of an example of the measuring device according to the present embodiment. Figure 4 Components constituting the distal end portion 120 are disassembled and arranged in the direction of the rotation axis A. FIG.

[0079] The top portion 120 rotates under the action of the driving portion 170. Since the driving portion 170 is composed of a motor as described later, vibration is generated. If the vibration is detected by the vibration sensor, an error will occur in the measurement result. In order to prevent the occurrence of such an error, the top portion 120 of the present embodiment is isolated in such a way that the vibration from the main body 110, especially the vibration generated by the driving portion 170, is not transmitted to the sensor 150 provided at the top portion 120.

[0080] The top end portion 120 of the present embodiment includes a lower support member 121, a lower vibration absorbing member 122, an intermediate support member 123, an upper vibration absorbing member 124, and an upper support member 125 in order from the main body 110 side. The lower support member 121, the intermediate support member 123, and the upper support member 125 are formed of resin such as polyoxymethylene. The lower vibration absorbing member 122 and the upper vibration absorbing member 124 are formed of a member that absorbs vibration. As a member for absorbing vibration, for example, a sponge such as foamed polyurethane, rubber, etc. are used. By arranging the lower vibration absorbing member 122 and the upper vibration absorbing member 124 between the driving part 170 and the sensor 150, the vibration is absorbed, thereby isolating the vibration from the driving part 170 to the contact 140 and the sensor 150. The lower vibration absorbing member 122 and the upper vibration absorbing member 124 are an example of a vibration isolation member.

[0081] Each of the lower support member 121, the lower vibration absorbing member 122, the intermediate support member 123, the upper vibration absorbing member 124, and the upper support member 125 is fixed to adjacent members by adhesives, etc. By fixing in this way, the rotation from the connecting shaft 130 can be transmitted from the lower support member 121 to the upper support member 125.

[0082] The lower support member 121 is connected to the connecting shaft 130, so that it rotates under the action of the driving part 170 of the main body 110. Therefore, when the connecting shaft 130 rotates under the action of the driving part 170, the top part 120 rotates. The lower support member 121 includes a rod-shaped member 1211. The rod-shaped member 1211 passes through the respective openings 1221, 1231, 1241, and 1251 of the lower vibration absorbing member 122, the intermediate support member 123, the upper vibration absorbing member 124, and the upper support member 125, and the top end of the rod-shaped member 1211 is exposed on the measurement object side. By the rod-shaped member 1211 contacting the measurement object, the detection unit 100 can be positioned when it is pressed against the measurement object. It should be noted that the rod-shaped member 1211 of the lower support member 121 is separated and arranged in a manner not to contact the intermediate support member 123 and the upper support member 125. Thus, the vibration from the main body 110 is not transmitted to the intermediate support member 123 and the upper support member 125 .

[0083] The lower vibration absorbing member 122 is provided between the lower supporting member 121 and the intermediate supporting member 123. The lower vibration absorbing member 122 transmits the rotation from the lower supporting member 121 to the intermediate supporting member 123, and absorbs the vibration transmitted from the lower supporting member 121, especially the vibration from the driving part 170, so that the vibration is not transmitted to the intermediate supporting member 123.

[0084] The intermediate support member 123 is provided between the lower vibration absorbing member 122 and the upper vibration absorbing member 124. The intermediate support member 123 includes a flat plate portion 1232 which is a disk-shaped flat plate having an opening portion 1231, and a cylindrical portion 1233 coupled to the surface of the flat plate portion 1232 on the side of the lower support member 121. The lower vibration absorbing member 122 is provided inside the cylindrical portion 1233 of the intermediate support member 123 in such a manner as to contact the surface of the flat plate portion 1232 on the side of the cylindrical portion 1233. The intermediate support member 123 transmits the rotation from the lower vibration absorbing member 122 to the upper vibration absorbing member 124.

[0085] The upper vibration absorbing member 124 is provided between the intermediate support member 123 and the upper support member 125. The upper vibration absorbing member 124 transmits the rotation from the intermediate support member 123 to the upper support member 125, and absorbs the vibration transmitted from the intermediate support member 123, especially the vibration generated by the driving part 170, so that the vibration is not transmitted to the upper support member 125. It should be noted that the portion from the vibration isolation member (the lower vibration absorbing member 122 and the upper vibration absorbing member 124) to the top end when viewed from the main body 110 is called the top portion. In this embodiment, the upper support member 125, the contact 140 and the sensor 150 are the top portion 160.

[0086] The upper support member 125 is a member for supporting the contactor 140 and the sensor 150 . FIG. 5A to FIG. 5D This is a diagram for explaining an upper support member 125 as an example of the measuring device according to the present embodiment. Figure 5A is a top view of the upper support member 125, Figure 5B is a front view of the upper support member 125, Figure 5C is a right side view of the upper support member 125, Figure 5D It is a perspective view of the upper support member 125 .

[0087] The upper support member 125 includes a disc-shaped bottom 1252 with a diameter of 10 mm to 50 mm. For example, the bottom 1252 of the present embodiment is a disc with a diameter of 30 mm. It should be noted that the diameter of the bottom 1252 can be appropriately determined according to the size of the object to be measured, and is not limited to the above range. In addition, the top view shape of the bottom 1252 is not limited to a circle, but can be a polygon. The bottom 1252 has an opening 1251 in the center. Contact support members 1253 and 1254 are provided on the upper surface of the bottom 1252. The contact support members 1253 and 1254 are plate-shaped members formed vertically from the upper surface of the bottom 1252 arranged in an array. The contact 140 is fixed to the upper part of the contact support members 1253 and 1254 by an adhesive or the like. The sensor 150 is fixed to the back side 142 of the contact 140 opposite to the contact surface 141 by an adhesive or the like. The sensor 150 is fixed between the contact support member 1253 and the contact support member 1254. In addition, a protrusion 1255 is formed at a position where the contact support members 1253 and 1254 of the bottom 1252 are opposite to the opening 1251. By providing the protrusion 1255, the contact 140 can be pressed uniformly against the measurement object without tilting. It should be noted that the upper support member 125 is an example of a support member. The protrusion 1255 is an example of a contact portion.

[0088] In the tip portion 120 of the present embodiment, by including two vibration absorbing members (the lower vibration absorbing member 122 and the upper vibration absorbing member 124), the vibration from the main body 110 can be attenuated by the lower vibration absorbing member 122, and further, the vibration can be suppressed by the upper vibration absorbing member 124. Thus, the influence of the vibration from the main body 110 on the sensor 150 can be reduced. In addition, by using a plurality of vibration absorbing members, the thickness of each vibration absorbing member can be set to be thin, so that the rotation from the connecting shaft 130 to the upper support member 125 can be stably transmitted. Moreover, by changing the frequency characteristics of the absorption of each vibration absorbing member, the vibration can be attenuated in a wider frequency range.

[0089] The driving unit 170 rotates the connecting shaft 130 to rotationally displace the distal end portion 120 relative to the object to be measured. The driving unit 170 is, for example, a motor such as a stepping motor or a DC motor. The motor may include a transmission.

[0090] When the contact 140 and the sensor 150 are moved by a person's hand, the shaking of the person's motion and the like are affected, and the speed at which the contact 140 and the sensor 150 move varies depending on the person, date, and time. In the measurement device 1 of this embodiment, the contact 140 and the sensor 150 can be moved at a desired speed by using the drive unit 170. For example, in a measurement over a long period of time (e.g., 1 week, 1 month, 1 year, etc.), even if the date and time or the person measuring the measurement changes, the contact 140 and the sensor 150 can be moved at a predetermined desired speed, thereby improving the reproducibility of the measurement.

[0091] <Control device 200>

[0092] Next return Figure 1 , the control device 200 is described.

[0093] The control device 200 includes a signal processing unit 210 and a detection unit control unit 220 .

[0094] The signal processing unit 210 is used to receive the signal from the sensor 150 of the detection unit 100. The signal processing unit 210 performs filtering and amplification processing on the received signal to obtain the measurement value of analog / digital conversion. The signal processing unit 210 measures the surface condition of the skin by processing the obtained measurement value. For example, the measurement value is Fourier transformed and measured by power spectrum or the like.

[0095] The detection unit control unit 220 controls the driving unit 170 of the detection unit 100. Specifically, the driving unit 170 is controlled to reciprocate the connecting shaft 130 between specified angles. The rotation speed of the connecting shaft 130 can be set to a constant speed during a portion of the reciprocating period, or can be set to change according to a sine function. It should be noted that, for example, in the case of measurements over a long period of time (for example, 1 week, 1 month, 1 year, etc.) and measurements of a large number of subjects, the speed is determined to be a certain constant reference speed, and the contact 140 and the sensor 150 are displaced at the reference speed for measurement. In the measurement device 1 of the present embodiment, by using the driving unit 170, it is possible to perform measurements at a determined reference speed, thereby improving the reproducibility of the measurement and suppressing deviations in the measurement. In addition, for the subject, by performing measurements at multiple speeds, the characteristics of the skin relative to the speed can be measured.

[0096] It should be noted that the control of the driving unit 170 of the detection unit 100 by the detection unit control unit 220 is not limited to rotating it in a reciprocating manner between the above-mentioned specified angles. For example, the connecting shaft 130 can be rotated in one direction at a specified speed. In addition, at this time, the speed can be set to be performed at multiple speeds. Moreover, the speed can be set to gradually change the speed based on the specified setting.

[0097] Each function of the control device 200 is realized by the CPU (Central Processing Unit) operating according to a program readable and stored in a storage device (not shown). For example, each of these functions is realized by the cooperation of hardware and software in a microcomputer including a CPU.

[0098] <Test Results>

[0099] FIG. 6A to FIG. 6C This is a diagram for explaining measurement results of an example of the measurement device according to the present embodiment.

[0100] FIG. 6A to FIG. 6C The measurement result is obtained by measuring the cheek of the subject as the measurement object. The measurement is performed by displacing the contact 140 and the sensor 150 in a reciprocating manner within a range of about 90 degrees. In addition, the speed in the rotation direction of the displacement of the contact 140 and the sensor 150 is measured so that it becomes a substantially constant speed except for the return portion.

[0101] Fig. 6A This is the output of the sensor 150 in a state where the contactor 140 is not in contact with the object to be measured, that is, in an idling state. Figure 6B This is the output of sensor 150 when measurement is performed with contactor 140 in contact with the smooth skin of a subject. Figure 6C This is the output of the sensor 150 when the measurement is performed with the contact 140 in contact with the rough skin of the subject. The vertical axis of the graph represents acceleration (×9.8 m / s 2 ), and the horizontal axis represents time (ms). In addition, acceleration is the output value of acceleration of the sensor 150 in the rotation direction.

[0102] The sensor 150 of this embodiment is an acceleration sensor. In the detection unit 100 of this embodiment, the acceleration in the rotation direction of the sensor 150 is used. During the measurement, the top end of the detection unit 100 is pressed against the cheek of the subject for a substantially vertical cheek to perform the measurement. Therefore, by rotating the contact 140 and the sensor 150, the measured value repeatedly rises or falls within 1 second under the influence of the gravitational acceleration. Fig. 6A In the idling state, only the change of gravity acceleration is measured. Figure 6B , Figure 6C It can be seen that the high-frequency vibration becomes larger in the test results of the test subjects with rough skin relative to the test results of the test subjects with smooth skin. That is, for the measured value of the sensor 150, the larger the high-frequency vibration, the rougher the surface state of the skin can be judged to be. In this way, by using the measuring device 1 of this embodiment, the surface state of the skin can be measured. It should be noted that, for the output of the sensor 150, in addition to the acceleration in the rotation direction, the acceleration in the radial direction and the rotation axis direction can be used for measurement.

[0103] <Function / Effect>

[0104] The measuring device 1 of this embodiment can displace the contactor 140 and the sensor 150 at a predetermined speed while the contactor 140 is brought into contact by the driving unit 170. Thus, even if the date and time or the person measuring the same changes, for example, stable measurement with high reproducibility can be performed.

[0105] The measuring device 1 of this embodiment includes a vibration absorbing member to block vibration transmitted from the driving unit 170 of the main body 110 to the sensor 150. Therefore, when the sensor 150 performs measurement, accurate measurement can be performed without being affected by the vibration of the driving unit 170 of the main body 110.

[0106] The measuring device 1 of this embodiment is small and easy to carry, and can be measured in any environment. In addition, the measuring device 1 of this embodiment displaces the contact 140 and the sensor 150 by rotation, so that the displacement distance can be long while measuring a narrow range of the measuring object (skin).

[0107] In the measurement device 1 of the present embodiment, since the contactor 140 is made of metal, it is possible to measure high-frequency vibrations generated when the contactor 140 and the measurement object are in contact and displaced.

[0108] <Usage example>

[0109] A measurement method and measurement results using the measurement device 1 of this embodiment are shown.

[0110] (1) Skin touch evaluation

[0111] The skin feel was evaluated using the measuring device 1 of the present embodiment. Specifically, correlation analysis was performed between the data obtained for the measurement results of the measuring device 1 of the present embodiment, the touch evaluation based on palpation by a professional evaluator, the stratum corneum moisture content evaluation based on the epidermal stratum corneum moisture content measuring device, and the uniformity of the stratum corneum (texture status evaluation) based on texture photography using a video microscope. The measurement was conducted on 40 women aged 20 to 49.

[0112] 7A to 7D This is a diagram for explaining the results of skin texture evaluation as a usage example of an example of the measurement device according to the present embodiment.

[0113] Fig. 7A as well as Figure 7B This is a correlation result between the measurement result by the measurement device 1 of this embodiment and the result of the tactile sensation evaluation by palpation by a professional evaluator. Fig. 7A This is a correlation result between the spectrum intensity of the vibration with a vibration frequency of 180 Hz and the evaluation result of the roughness by palpation evaluation based on palpation in the measuring device 1 . Figure 7B This is the correlation result between the spectral intensity of the vibration with a vibration frequency of 30 Hz in the measuring device 1 and the evaluation result of the viscosity degree by palpation evaluation. From this correlation result, it can be confirmed that there is a non-accidental correlation between the result measured by the measuring device 1 of this embodiment and the result of the tactile evaluation by a professional evaluator by palpation. In this way, by using the measuring device 1 of this embodiment, it is possible to evaluate the tactile feel of the skin.

[0114] Figure 7C This is the correlation result between the spectral intensity of the vibration at a vibration frequency of 30 Hz in the measuring device 1 and the stratum corneum moisture content evaluation result based on the epidermal stratum corneum moisture content measuring device. From this correlation result, it can be confirmed that there is a non-accidental correlation between the result measured by the measuring device 1 of this embodiment and the stratum corneum moisture content evaluation result based on the epidermal stratum corneum moisture content measuring device. In this way, by using the measuring device 1 of this embodiment, it is possible to evaluate the stratum corneum moisture content.

[0115] Fig.7D This is the correlation result between the spectral intensity of the vibration with a vibration frequency of 140 Hz in the measuring device 1 and the uniformity of the stratum corneum (evaluation of the state of the texture) based on the texture photography of the video microscope. From this correlation result, it can be confirmed that there is a non-accidental correlation between the result measured by the measuring device 1 of this embodiment and the uniformity of the stratum corneum (evaluation of the state of the texture) based on the texture photography of the video microscope. In this way, by using the measuring device 1 of this embodiment, it is possible to evaluate the state of the texture.

[0116] (2) Evaluation of the feel of cosmetics during use

[0117] When two kinds of lotions with different evaluations of the feeling of use by professional evaluators were applied on artificial skin (made by Beaulax), vibration data was obtained using a measuring device 1. As the evaluation of the feeling of use, the refreshing feeling was adopted. Sample 1 is a sample with a higher refreshing feeling, and sample 2 is a sample with a lower refreshing feeling. It should be noted that in order to evaluate the refreshing feeling with numerical values, several professional evaluators conducted an evaluation with the refreshing feeling set to 7 stages from -3 to 3, and the average value of the evaluation score was evaluated as the refreshing score. In their evaluation results, sample 1 had a refreshing score of 1.8, and sample 2 had a refreshing score of -2.33.

[0118] FIG. 8A to FIG. 8C This is a diagram for explaining the results of evaluating the feel of cosmetics during use as an example of use of the measuring device according to the present embodiment.

[0119] Fig. 8A 1 is a vibration waveform during measurement of sample 1 in measurement device 1 . Figure 8B : This is a vibration waveform during measurement of sample 2 in measurement device 1 . Figure 8C This is the result of measuring the frequency spectra of sample 1 and sample 2 in the measuring device 1. As is clear from this evaluation result, different vibration data can be obtained for cosmetics with different feel in use as a result of measurement by the measuring device 1 of this embodiment. In this way, by using the measuring device 1 of this embodiment, it is possible to evaluate the feel in use of cosmetics.

[0120] (3) Evaluation of cosmetics before and after use

[0121] The vibration data was acquired using the measurement device 1 before and after applying the cream (cosmetics) to the inner side of the front wrist of the subject.

[0122] 9A to 9C This is a diagram for explaining the results of evaluating cosmetics before and after use as an example of use of an example of the measuring device of this embodiment.

[0123] Fig. 9A This is a vibration waveform during measurement by the measuring device 1 before application of cream. Fig. 9B This is a vibration waveform during measurement after application of cream in the measurement device 1. Fig. 9C This is the result of measuring the frequency spectrum before and after the application of the cream by the measuring device 1. As is clear from this evaluation result, different vibration data can be obtained before and after the application of the cream as a result of the measurement by the measuring device 1 of this embodiment. In this way, by using the measuring device 1 of this embodiment, it is possible to evaluate the cosmetics before and after use.

[0124] <Modification>

[0125] The sensor 150 is not limited to a vibration sensor. For example, a force sensor may be used as the sensor 150. A three-axis force sensor may be used as the force sensor. By including a force sensor as the sensor 150, it is possible to measure the frictional force between the skin and the contact 140 when the contact 140 is displaced. In addition, the sensor 150 may be set to include a vibration sensor and a force sensor.

[0126] The sensor 150 can be set as a wireless sensor that outputs wirelessly. By setting the sensor 150 as a wireless sensor, the wiring can be simplified. In addition, by setting the sensor 150 as a wireless sensor, there is no entanglement of the wiring, and the degree of freedom based on the rotation of the driving unit 170 can be improved (for example, rotational motion at a constant speed in one direction, etc.).

[0127] The measuring device 1 may include a plurality of sensors 150. For example, the measuring device of the modified example may be configured to Figure 5A , Figure 5B as well as Figure 5D The location of the protrusion 1255 is shown further having a sensor 150 .

[0128] The control device 200 may be built in the housing 111 of the main body 110. This allows the user to easily perform measurements on a daily basis.

[0129] The contact 140 may be replaceable. By making the contact 140 replaceable, the most suitable contact can be used according to the measurement and the measurement object.

[0130] The contact 140 is not limited to the plate-like shape as in the present embodiment. For example, it can be a contact such as a brush. By using a brush as the contact 140, for example, it is possible to evaluate the skin when applying cosmetics. It should be noted that in addition to the brush, an application tool used in cosmetics such as a cotton pad, a sponge, etc. can also be used as a contact.

[0131] The structure of the top portion 120 is not limited to that of the present embodiment. For example, in order to position the contact 140 when it is pressed against the object to be measured, a cylindrical cover portion at the same height as the end portion of the top portion 120 on the side of the object to be measured can be provided around the top portion 120. Thus, by pressing the cover portion against the skin, the pressing direction of the contact 140 can be positioned. It should be noted that the height of the cylindrical cover portion can be set to be variable according to the shape, softness, and surface state of the skin at the measurement site. In addition, a mechanism (swinging head mechanism) can be provided between the main body 110 and the top portion 120 so that the top portion 120 is at a constant angle, so that the contact 140 contacts the object to be measured at a constant angle.

[0132] The top portion 120 may include sensors other than the sensor 150. For example, it may be configured to include a temperature sensor. By including the temperature sensor, the temperature of the skin, which is the object to be measured, can be measured at the same time. In addition, an imaging element such as a CCD camera may be included. By including the imaging element, the texture of the skin, etc., can be measured at the same time.

[0133] The tip portion 120 may be detachable from the main body 110 . For example, the tip portion 120 may be connected to the main body 110 of another detection unit 100 , or another tip portion 120 may be connected to the main body 110 .

[0134] The displacement of the tip portion 120 is not limited to the displacement in the rotational direction of the present embodiment, but may be a displacement in a linear direction by, for example, linear reciprocating motion.

[0135] The weight of the head portion 160 is preferably 30 g or less, more preferably 20 g or less, and particularly preferably 15 g or less. Fig.10 It is a graph showing the weight of the top part and the attenuation ratio of the vibration generated between the measurement object and the top part. The experiment obtained the ratio of the value obtained by directly setting the vibration sensor of the sensor 150 on the simulated skin placed on the vibration table that is subjected to random vibrations and measuring the vibration to the value obtained by setting the sample of the top part 160 with a changed weight and the vibration sensor on the simulated skin (vibration attenuation ratio). The vibration attenuation ratio is obtained by the average value of each vibration attenuation ratio in the vibration frequency range of 100 to 500 Hz. It should be noted that it is considered that the closer the vibration attenuation ratio is to 1, the less the vibration of the vibration table is attenuated and the more faithful the measurement is. By Fig.10 As a result, the smaller the weight of the top part, the more accurately the vibration generated on the vibration table can be measured. Fig.10 If it is 30 g or less, it is possible to measure vibrations of approximately 40% or more compared to the case where the sensor 150 is directly mounted.

[0136] The measurement object is not limited to human skin. For example, it can be used for the skin of livestock such as cows and pigs. In addition, it is not limited to human skin (skin), and the surface state of artificial leather, simulated skin, cloth, paper, hair, etc. can be measured.

[0137] In the measuring device 1 of the present embodiment, a vibration absorbing member is used as a vibration isolating member. However, the vibration isolating member is not limited to the vibration absorbing member. For example, the driving unit 170 and the sensor 150 can be connected by using a magnetic coupling to isolate the vibration from the driving unit 170 to the contact 140 and the sensor 150. The magnetic coupling provides a space between the couplings and transmits force by magnetic force. Therefore, it is possible to isolate vibration between the couplings.

[0138] <<Second Embodiment>>

[0139] <Measurement Device 2>

[0140] Next, a second embodiment will be described. Fig.11 This is an overall configuration diagram of an example of a measuring device according to this embodiment.

[0141] The measuring device 2 of this embodiment includes a detection unit 300 and a control device 400. The detection unit 300 and the control device 400 are connected in a communicative manner wirelessly or by wire. The measuring device 2 of this embodiment is the same as the measuring device 1, and measures the surface state of the skin associated with the touch, such as whether the surface of the skin is smooth.

[0142] <Detection Unit 300>

[0143] First, the detection unit 300 will be described.

[0144] Fig.12 It is a front view of the detection unit 300 which is an example of the measurement device of this embodiment. Fig.13 It is a side view of the detection unit 300 which is an example of the measurement device of this embodiment. Fig.14 It is a perspective view of a detection unit 300 which is an example of the measurement device according to the present embodiment.

[0145] The detection unit 300 of the measuring device 2 of the present embodiment includes a main body 310 and a top portion 320. The top portion 320 is built into the main body 310 in such a way that the contact 340 is exposed from the opening of the pressing ring 316 described later of the main body 310. The detection unit 300 measures the surface state of the skin by pressing the top portion 320 against the skin of the measuring object, such as the wrist, cheek, etc. of a person, in the direction of the arrow P. The top portion 320 rotates in the direction of the arrow R1 with the rotation axis A as the center. It should be noted that the rotation direction is not limited to the direction of the arrow R1. For example, it can rotate in the opposite direction of the arrow R1, or it can repeatedly rotate in the direction of the arrow R1 and the opposite direction thereof.

[0146] The main body 310 includes a substantially cylindrical housing 311 tapered in the center. The housing 311 is composed of a top cover 312, a side cover 313, a side cover 314, and a bottom cover 315. Each cover of the housing 311 is formed of acrylonitrile / butadiene / styrene copolymer resin (ABS (Acrylonitrile Butadiene Styrene) resin) or the like.

[0147] A cylindrical pressing ring 316 including an annular flat surface 316a at the top is screwed to the top of the top cover 312. The top end portion 320 is included inside the pressing ring 316 so that the contact 340 of the top end portion 320 is exposed to the outside.

[0148] By pressing the plane 316a of the pressing ring 316 against the skin, the pressing direction of the measuring device 2 can be positioned. The distance from the plane 316a of the pressing ring 316 to the contact surface 341 of the contact 340 described later along the direction of the rotation axis A can be changed by changing the amount of screwing to the top cover 312. In this way, for example, the distance from the plane 316a of the pressing ring 316 to the contact surface 341 of the contact 340 along the direction of the rotation axis A can be changed according to the shape, softness, and surface state of the skin at the measuring site. Thereby, the pressing force of the contact 340 of the top end 320 when contacting the measuring object can be adjusted. It should be noted that the pressing ring 316 is formed of, for example, polymethyl methacrylate resin (PMMA (Polymethyl Methacrylate)) or the like.

[0149] The main body 310 includes a drive unit 370, which will be described later, for rotating the tip 320 inside the housing 311. That is, the main body 310 includes the housing 311 in which the drive unit 370 is built. The housing 311 is shaped in a size that can be held by a measurer. The measurer performs measurement by holding the main body 310. The measurer holds the main body 310 and moves it toward the measurement object, thereby pressing the tip 320 against the measurement object.

[0150] The contactor 340 is a member for contacting the measurement object of the measurement device 2. The contact surface 341 of the contactor 340 contacts the measurement object. The contact surface 341 of the contactor 340 may be a flat surface or may have irregularities on the surface depending on the measurement object and the purpose of measurement.

[0151] The measuring object contacts the contact 340, and the top end portion 320 rotates in the direction of, for example, the arrow R1, about the rotation axis A, thereby generating vibration. For example, when the surface roughness of the measuring object is large, the vibration becomes larger. On the other hand, when the surface roughness of the measuring object is small, the vibration becomes smaller. The material of the contact 340 is a metal such as stainless steel, copper, or brass. By setting the material of the contact 340 to metal, the generated vibration in a wider frequency band, especially a high frequency band, can be transmitted to the sensor 351. It should be noted that the material of the contact 340 can be set to an elastomer such as rubber. By setting the material of the contact 340 to an elastomer, for example, it is possible to simulate vibration propagating along a finger.

[0152] The object to be measured contacts the contactor 340, and the tip portion 320 rotates about the rotation axis A, for example, in the direction of arrow R1, thereby generating friction between the skin and the contactor 140 when the contactor 140 is displaced. The friction is detected by a force sensor 352 described later.

[0153] Furthermore, the structure of the detection unit 300 will be described in detail. Fig.15 It is a cross-sectional view of a detection unit 300 which is an example of the measurement device according to the present embodiment. Fig.15 yes Fig.13 BB cross-sectional view of the detection unit 300 of the measuring device 2 of this embodiment. Fig.15 In order to simplify the figure, some structures are omitted.

[0154] The tip portion 320 includes a control unit housing 321 and a sensor housing 322 .

[0155] The control unit housing 321 includes a control unit lower housing 321a and a control unit upper housing 321b. In addition, the control unit housing 321 includes a control unit substrate 327 therein. The control unit substrate 327 includes a circuit for wirelessly transmitting a signal from the sensor 350 to the control device 400. A rotating shaft 334a of a collector ring 334 described later is connected to the control unit lower housing 321a. The sensor housing 322 is mounted and bonded to the control unit upper housing 321b via a vibration absorbing component 325. The vibration absorbing component 325 is formed by a component for absorbing vibration. As a component for absorbing vibration, for example, a sponge such as foamed polyurethane, rubber, etc. The vibration absorbing component 325 is an example of a vibration isolation component.

[0156] It should be noted that the wireless method for transmitting from the control unit substrate 327 to the control device 400 may be a wireless method in accordance with wireless communication standards such as Wi-Fi (registered trademark), Bluetooth (registered trademark), or ZigBee (registered trademark).

[0157] The sensor housing 322 includes a sensor lower housing 322a and a sensor upper housing 322b. In addition, the sensor housing 322 includes a sensor substrate 328 therein. The sensor substrate 328 is a substrate including a circuit for detecting a signal of the sensor 350 and sending the detected signal to the control unit substrate 327. The sensor lower housing 322a is bonded and fixed to the control unit upper housing 321b via the vibration absorbing member 325. The sensor upper housing 322b includes an opening. Through the opening, the contact 340 is connected to the sensor substrate 328 via the connecting member 329. In addition, the sensor substrate 328 has a force sensor 352 of the sensor 350 at a portion where the connecting member 329 is mounted on the sensor substrate 328. In addition, the sensor substrate 328 has an acceleration sensor 351 of the sensor 350 on the back side of the sensor substrate 328 located at the force sensor 352. The acceleration sensor 351 is, for example, a 3-axis acceleration sensor. In addition, the force sensor 352 is, for example, a 6-axis force sensor.

[0158] The driving unit 370 is, for example, a motor. The driving unit 370 is used to rotate the rotating shaft 371. Fig.15 , the details of the inside of the driving unit 370 are omitted. The driving unit 370 is mounted on the side covers 313 and 314 of the housing 311 by means of the mounting fittings 318. It should be noted that the driving unit 370 is mounted on the mounting fittings 318 by means of the gel bushings 318a formed of gel material. Thus, the vibration generated in the driving unit 370 is prevented from being transmitted to the housing 311. It should be noted that the power supply and the control signal are supplied to the driving unit 370 from the control circuit 380.

[0159] In order to connect the tip portion 320 and the driving portion 370, the detection portion 300 includes a magnetic coupling 332 and a slip ring 334. The magnetic coupling 332 and the slip ring 334 are examples of a connecting member.

[0160] The magnetic coupling 332 is a non-contact connector using a magnet. By connecting the top portion 320 and the drive portion 370 in a non-contact manner with the help of the magnetic coupling 332, the vibration from the drive portion 370 can be prevented from being transmitted to the top portion 320. That is, the magnetic coupling 332 is an example of a vibration isolation component for isolating the vibration from the drive portion 370 to the top portion 320. The magnetic coupling 332 includes a coupling disk 332a and a coupling disk 332b. The coupling disk 332a and the coupling disk 332b each include a magnet. Under the magnetic force of the magnet, the coupling disk 332a and the coupling disk 332b can transmit force in a non-contact state. The coupling disk 332a is connected to the rotating shaft 371 of the drive portion 370 by means of a bushing 332a1. The coupling disk 332b is connected to the rotating shaft 334a of the collector ring 334 by means of a bushing 332b1.

[0161] The collector ring 334 is a connector for transmitting power and signals from the outside to the rotating member. In the detection unit 300 of this embodiment, the collector ring 334 is used to supply power from the main body 310 to the control unit substrate 327 and the sensor substrate 328 of the top end 320. Fig.15 , the details of the inside of the slip ring 334 are omitted. The wiring for supplying power from the control circuit 380 of the main body 310 is connected to the slip ring 334. The power supplied from the control circuit 380 is supplied to the control unit substrate 327 via the slip ring 334, specifically, through the rotating shaft 334a of the slip ring 334. The slip ring 334 is mounted on the side covers 313 and 314 of the housing 311 by means of the mounting fittings 319.

[0162] It should be noted that, in this embodiment, although there is a magnetic coupling 332 between the driving part 370 and the slip ring 334, the driving part 370 and the slip ring 334 may be directly connected. In addition, the driving part 370 and the slip ring 334 may be connected by other vibration isolation components different from the magnetic coupling 332, such as a sponge.

[0163] Here, a modification example in which the driving unit 370 and the slip ring 334 are connected via the sponge 333 s which is a vibration isolation member will be described.

[0164] Fig.16 It is a cross-sectional view of a detection unit 300A according to a modified example of the measurement device of the present embodiment. Fig.16 is with Fig.15 FIG. 3 is a diagram corresponding to a cross-sectional view of the detection unit 300 of the measurement device 2 of the present embodiment. Fig.16 In order to simplify the figure, some components are omitted. Fig.15 The same components are denoted by the same reference numerals, and repeated descriptions are omitted.

[0165] In order to connect the tip portion 320 and the driving portion 370, the detection portion 300A includes a sponge coupling 333 and a slip ring 334. The sponge coupling 333 and the slip ring 334 are examples of a connecting member.

[0166] The sponge connector 333 is a component that connects components through a sponge 333s. The sponge 333s is, for example, a sponge of foamed polyurethane or the like. The top end 320 and the drive part 370 are connected by the sponge 333s through the sponge connector 333, so that the vibration from the drive part 370 can be prevented from being transmitted to the top end 320. That is, the sponge connector 333 is an example of a vibration isolation component for isolating the vibration from the drive part 370 to the top end 320. The sponge connector 333 includes a coupling plate 333a and a coupling plate 333b. A sponge 333s is fixed between the coupling plate 333a and the coupling plate 333b. For example, the coupling plate 333a and the coupling plate 333b are respectively bonded to the sponge 333s. As a result, the coupling plate 333a and the coupling plate 333b can transmit force through the sponge 333s. The coupling disc 333a is connected to the rotating shaft 371 of the driving part 370 by means of the positioning ring 333a1. The coupling disc 333b is connected to the rotating shaft 334a of the collector ring 334 by means of the positioning ring 333b1. The coupling disc 333a and the positioning ring 333a1 or the coupling disc 333b and the positioning ring 333b1 are fixed, for example, by fastening with screws in threaded holes formed in the positioning ring 333a1 or the positioning ring 333b1. In addition, the positioning ring 333a1 and the rotating shaft 371 and the positioning ring 333b1 and the rotating shaft 334a are fixed, for example, by pressing the rotating shaft 371 or the rotating shaft 334a with a set screw provided in a threaded hole formed in the positioning ring 333a1 or the positioning ring 333b1. It should be noted that the fixing method is not limited to screws, and can be fixed by adhesives or the like. In addition, the rotation shafts 371 and 334a and the coupling plates 333a and 333b may be directly connected without using the positioning rings 333a1 and 333b1.

[0167] It should be noted that, instead of the sponge 333 s of the sponge coupler 333 , a member for preventing the transmission of vibration, such as rubber or gel, may be used.

[0168] <Control device 400>

[0169] Next, return Fig.11 , the control device 400 is described.

[0170] The control device 400 includes a signal processing unit 410 and a detection unit control unit 420 .

[0171] The signal processing unit 410 is used to receive a signal from the sensor 350 of the detection unit 300. The signal processing unit 410 of this embodiment wirelessly receives the signal from the sensor 350 through the control unit substrate 327. The signal processing unit 410 performs filtering and amplification processing on the received signal to obtain a measurement value after analog / digital conversion. The signal processing unit 410 measures the surface state of the skin by processing the obtained measurement value. For example, the measurement value is Fourier transformed and measured by power spectrum or the like.

[0172] The detection unit control unit 420 is used to control the driving unit 370 of the detection unit 300. The control performed by the detection unit control unit 420 is the same as that of the detection unit control unit 220 of the first embodiment.

[0173] <<Third Embodiment>>

[0174] Next, a third embodiment will be described. In the third embodiment, a detection unit 500 suitable for being mounted on a robot arm or the like is shown.

[0175] <Measurement Device 3>

[0176] Fig.17 : is an overall structure diagram of an example of a measuring device of this embodiment. The measuring device 3 of this embodiment includes a detection unit 500 and a control device 600. The detection unit 500 includes a sensor 550 (an acceleration sensor 551 and a force sensor 552). The detection unit 500 and the control device 600 are connected in a wireless communication manner. The measuring device 3 of this embodiment is the same as the measuring device 1, and measures the surface state of the skin associated with the touch, such as whether the surface of the skin is smooth.

[0177] <Detection Unit 500>

[0178] First, the detection unit 500 is described. As a driving unit that causes the detection unit 500 to move relative to the measurement object, a robot arm or the like outside the detection unit 500 is used. Therefore, the detection unit 500 does not need to include the driving unit included in the detection units of the first embodiment and the second embodiment. Therefore, the detection unit 500 of this embodiment is limited to the necessary structure of the sensor 550 for detecting vibration and force for description.

[0179] Fig.18 It is a perspective view of a detection unit 500 which is an example of a measurement device according to the third embodiment. Fig.19 FIG. 5 is a cross-sectional view of a detection unit 500 as an example of a measurement device according to the present embodiment. Fig.19 In order to simplify the figure, some structures are omitted.

[0180] The detection unit 500 of the measuring device 2 of this embodiment includes a tip portion 520 and an arm mounting fixture 515. The detection unit 500 mounted on a robot arm or the like presses the tip portion 520 against the skin of a measurement object, such as a human wrist or cheek, in the direction of arrow P, thereby measuring the surface condition of the skin.

[0181] The top end portion 520 includes a control unit housing 521 and a sensor housing 522 .

[0182] The control unit housing 521 includes a control unit lower housing 521a and a control unit upper housing 521b. In addition, the control unit housing 521 includes a control unit substrate 527 therein. The control unit substrate 527 is a substrate including a circuit for wirelessly transmitting signals from the acceleration sensor 551 and the force sensor 552 (sensor 550) to the control device 600. For the wireless method, it is the same as the control unit substrate 327 of the second embodiment. The arm mounting fixture 515 is mounted on the control unit lower housing 521a. The sensor housing 522 is mounted and bonded to the control unit upper housing 521b via the vibration absorbing component 525. The vibration absorbing component 525 is formed by a component for absorbing vibration. As a component for absorbing vibration, for example, a sponge such as foamed polyurethane, rubber, etc. The vibration absorbing component 525 is an example of a vibration isolation component.

[0183] The sensor housing 522 includes a sensor lower housing 522a and a sensor upper housing 522b. In addition, the sensor housing 522 includes a sensor substrate 528 inside thereof. The sensor substrate 528 is a substrate including a circuit for detecting a signal of the sensor 550 and sending the detected signal to the control unit substrate 527. The sensor lower housing 522a is bonded and fixed to the control unit upper housing 521b via the vibration absorbing member 525. The sensor upper housing 522b includes an opening. Through the opening, the contact 540 is connected to the sensor substrate 528 by means of a connecting member 529. In addition, the sensor substrate 528 has a force sensor 552 of the sensor 550 at a portion where the connecting member 529 is mounted on the sensor substrate 528. In addition, the sensor substrate 528 has an acceleration sensor 551 of the sensor 550 on the back side of the sensor substrate 528 located at the force sensor 552. The acceleration sensor 551 is, for example, a 3-axis acceleration sensor. In addition, the force sensor 352 is, for example, a 6-axis force sensor.

[0184] <Control device 600>

[0185] Next, return Fig.17 , the control device 600 is described.

[0186] The control device 600 includes a signal processing unit 610 .

[0187] The signal processing unit 610 is used to receive a signal from the sensor 550 of the detection unit 500. The signal processing unit 610 of this embodiment wirelessly receives the signal from the sensor 550 via the control unit substrate 527. The signal processing unit 610 performs filtering and amplification processing on the received signal to obtain a measurement value after analog / digital conversion. The signal processing unit 610 measures the surface state of the skin by processing the obtained measurement value. For example, the measurement value is Fourier transformed and measured by power spectrum or the like.

[0188] <<Fourth Embodiment>>

[0189] Next, a fourth embodiment will be described. In the fourth embodiment, a modified example of the detection unit 300 of the second embodiment is shown. It should be noted that the detection unit 700 of the fourth embodiment below is used in combination with the control device 400.

[0190] <Detection Unit 700>

[0191] A detection unit 700 will be described as a modification of the detection unit 300. The same reference numerals are given to the same components as those of the detection unit 300, and description thereof will be omitted. The detection unit 700 includes a grip extending in a direction perpendicular to the direction in which the measurement object is pressed. Fig. 20 It is a perspective view of a detection unit 700 which is an example of the measurement device according to the present embodiment. Fig.21 1 is a diagram showing the internal structure of a detection unit 700 as an example of a measurement device according to this embodiment. Specifically, Fig.21 The front half of the housing 711 of the detection unit 700 is removed to expose the inside. It should be noted that the detection unit 700 also includes a circuit substrate (not shown) inside the housing 711, such as a power supply substrate and a drive substrate for driving the drive unit 770.

[0192] The detection unit 700 includes a main body 710 and a top portion 320. The top portion 320 is built into the main body 710 in such a way that the contact 340 is exposed from the opening of the pressing ring 716 of the main body 710. The detection unit 700 presses the top portion 320 against the skin of the measurement object, such as a person's wrist, cheek, etc., in the direction of arrow P1, thereby measuring the surface condition of the skin. The top portion 320 rotates in the direction of arrow R2 with the rotation axis C as the center. It should be noted that the rotation direction is not limited to the direction of arrow R2. For example, it can be set to rotate in the opposite direction of arrow R2, or it can be set to rotate repeatedly in the direction of arrow R2 and the opposite direction thereof.

[0193] The main body 710 includes a housing 711 having an L-shaped shape when viewed from the side. The housing 711 includes a gripping portion 712 extending in a perpendicular direction relative to a direction in which a measurement object is pressed (the direction of arrow P1), and a pressing portion 713 extending in the direction in which the measurement object is pressed (the direction of arrow P1). The housing 711 is formed of ABS resin or the like.

[0194] The end 713b of the pressing portion 713 that presses the object to be measured is formed with an external thread on the outer side. A cylindrical pressing ring 716 is screwed to the end 713b. The top end 320 is provided inside the pressing ring 716 in a manner that the contact 340 of the top end 320 is exposed to the outside.

[0195] By pressing the end face 716a of the pressing ring 716 against the skin, the pressing direction of the measuring device can be positioned. The distance from the end face 716a of the pressing ring 716 to the contact surface of the contact 340 along the rotation axis C can be changed by changing the amount of the screw connection to the end 713b. In addition, the pressing force of the contact 340 of the top end 320 when contacting the measuring object can be adjusted. It should be noted that the pressing ring 816 is formed of, for example, polymethyl methacrylate resin (PMMA) or the like.

[0196] The main body 710 includes a driving unit 770 for rotating the top end 320 inside the pressing unit 713. That is, the main body 710 includes a housing 711 for housing the driving unit 770. The measurer performs measurement by holding the gripping unit 712. The measurer holds the gripping unit 712 and moves it toward the measurement object, thereby pressing the top end 320 against the measurement object. In the detection unit 700, a smaller motor is used as the driving unit 770. By using a small motor, the overall size of the detection unit 700 can be set smaller.

[0197] The detection unit 700 includes a sponge coupler 733 and a slip ring 334 to connect the distal end portion 320 and the driving unit 770. The sponge coupler 733 and the slip ring 334 are examples of a connection member.

[0198] The sponge connector 733 is a component that connects the components through a sponge 733s. The sponge 733s is, for example, a sponge of foamed polyurethane or the like. The sponge connector 733 connects the top end portion 320 and the driving portion 770 via the sponge 733s, thereby preventing the vibration from the driving portion 770 from being transmitted to the top end portion 320. That is, the sponge connector 733 is an example of a vibration isolation component for isolating the vibration from the driving portion 770 to the top end portion 320.

[0199] The sponge connector 733 includes a coupling plate 733a and a coupling plate 733b. A sponge 733s is fixed between the coupling plate 733a and the coupling plate 733b. For example, the coupling plate 733a and the coupling plate 733b are respectively bonded to the sponge 733s. Thus, the coupling plate 733a and the coupling plate 733b can transmit force through the sponge 733s.

[0200] The coupling disc 733a is connected to the rotating shaft of the driving part 770 via the positioning ring 733a1. The coupling disc 733b is connected to the rotating shaft of the collector ring 334 via the positioning ring 733b1. The coupling disc 733a and the positioning ring 733a1, or the coupling disc 733b and the positioning ring 733b1 are fixed by, for example, fastening with screws in threaded holes formed in the positioning ring 733a1 or the positioning ring 733b1.

[0201] In addition, the rotating shaft of the positioning ring 733a1 and the driving part 770, the rotating shaft of the positioning ring 733b1 and the collector ring 334 are fixed by pressing the rotating shaft 371 or the rotating shaft 334a with a set screw provided in a threaded hole formed in the positioning ring 733a1 or the positioning ring 733b1. It should be noted that the fixing method is not limited to screws, and it can also be fixed by an adhesive or the like. In addition, each rotating shaft and the coupling disk 733a, 733b can be directly connected without using the positioning rings 733a1, 733b1.

[0202] It should be noted that the drive unit 770 and the slip ring 334 are fixed to the housing 711 by fixing members not shown. Specifically, the drive unit 770 is pressed against the housing 711 via a gel bushing formed of a gel material. In addition, the slip ring 334 is fixed to the housing 711 by screws at the bearing portion through a mounting fitting.

[0203] By including the gripping portion extending in the direction perpendicular to the direction in which the measurement object is pressed as in the detection portion 700 of the first modification, it is possible to facilitate handling when the measurement object is pressed against the detection portion 700 .

[0204] <<Fifth Embodiment>>

[0205] Next, the fifth embodiment will be described. In the fifth embodiment, a modified example of the detection unit 300 of the second embodiment is shown. It should be noted that the detection unit 800 of the fifth embodiment below is used in combination with the control device 400. In the fifth embodiment, the detector is further miniaturized.

[0206] <Detection Unit 800>

[0207] A detection unit 800 will be described as a modified example of the detection unit 300. It should be noted that the same reference numerals are given to the same components as those of the detection unit 300, and description thereof will be omitted. Fig. 22 It is a perspective view of a detection unit 800 which is an example of the measurement device according to the present embodiment. Fig.23 800 is an internal structure diagram of an example of a measuring device according to this embodiment. Fig.23 The front half of the housing 811 of the detection unit 800 is removed to show the state of exposing the inside. It should be noted that the detection unit 800 also includes a circuit substrate (not shown) inside the housing 811, such as a power supply substrate, a drive substrate for driving the drive unit 870, etc.

[0208] The detection unit 800 includes a main body 810 and a top portion 320. The top portion 320 is built into the main body 810 in such a way that the contact 340 is exposed from the opening of the pressing ring 816 of the main body 810. The detection unit 800 measures the surface state of the skin by pressing the top portion 320 against the skin of the measurement object, such as a person's wrist, cheek, etc., in the direction of arrow P2. The top portion 320 rotates in the direction of arrow R3 with the rotation axis D as the center. It should be noted that the rotation direction is not limited to the direction of arrow R3. For example, it can be set to rotate in the opposite direction of arrow R3, or it can be set to rotate repeatedly in the direction of arrow R3 and the opposite direction thereof.

[0209] The main body 810 includes a housing 811. The housing 811 is formed of ABS resin or the like. An end 811b of the housing 811 that presses the object to be measured is formed with an external thread on the outer side. A cylindrical pressing ring 816 is screwed to the end 811b. The top end 320 is provided inside the pressing ring 816 in a manner that the contact 340 of the top end 320 is exposed to the outside.

[0210] By pressing the end face 816a of the pressing ring 816 against the skin, the pressing direction of the measuring device can be positioned. The distance from the end face 816a of the pressing ring 816 to the contact surface of the contact 340 along the direction of the rotation axis D can be changed by changing the amount of the screw connection to the end 811b. In addition, the pressing force of the contact 340 of the top end 320 when contacting the measuring object can be adjusted. It should be noted that the pressing ring 816 is formed of, for example, polymethyl methacrylate resin (PMMA) or the like.

[0211] The main body 810 has a driving unit 870 for rotating the tip 320. That is, the main body 810 includes a housing 811 for housing the driving unit 870. The measurer performs measurement by holding the housing 811. The measurer holds the housing 811 and moves it toward the measurement object, thereby pressing the tip 320 against the measurement object.

[0212] The detection unit 800 includes a sponge coupler 833 and a slip ring 334 in order to couple the distal end portion 320 and the driving unit 870. The sponge coupler 833 and the slip ring 334 are examples of coupling members.

[0213] The sponge connector 833 is a component that connects the components through a sponge 833s. The sponge 833s is, for example, a sponge of foamed polyurethane. The sponge connector 833 connects the top end 320 and the drive unit 870 via the sponge 833s, thereby preventing the vibration from the drive unit 770 from being transmitted to the top end 320. That is, the sponge connector 833 is an example of a vibration isolation component for isolating the vibration from the drive unit 870 to the top end 320.

[0214] The sponge connector 833 includes a coupling plate 833a and a coupling plate 833b. A sponge 833s is fixed between the coupling plate 833a and the coupling plate 833b. For example, the coupling plate 833a and the coupling plate 833b are bonded to the sponge 833s respectively. Thus, the coupling plate 833a and the coupling plate 833b can transmit force through the sponge 833s.

[0215] The coupling disc 833a is connected to the rotating shaft of the driving part 870 via the positioning ring 833a1. The coupling disc 833b is connected to the rotating shaft of the collector ring 334 via the positioning ring 833b1. The coupling disc 833a and the positioning ring 833a1, or the coupling disc 833b and the positioning ring 833b1 are fixed by, for example, fastening with screws in threaded holes formed in the positioning ring 833a1 or the positioning ring 833b1.

[0216] In addition, the rotation shaft of the positioning ring 833a1 and the driving part 870, and the rotation shaft of the positioning ring 833b1 and the collector ring 334 are fixed by pressing the rotation shaft 371 or the rotation shaft 334a, for example, by a set screw provided in a threaded hole formed in the positioning ring 833a1 or the positioning ring 833b1. It should be noted that the fixing method is not limited to screws, and can also be fixed by an adhesive or the like. In addition, the respective rotation shafts and the coupling plates 833a and 833b can be directly connected without using the positioning rings 833a1 and 833b1.

[0217] It should be noted that the driving portion 870 and the slip ring 334 are respectively fixed to the housing 811 by fixing members not shown.

[0218] By using the detection unit 800 of the second modification, it is possible to perform measurement using a more compact detection unit.

[0219] <<Sixth Embodiment>>

[0220] Next, the sixth embodiment will be described. In the sixth embodiment, a modified example of the detection unit 300 of the second embodiment is shown. It should be noted that the detection unit 900 of the sixth embodiment below is used in combination with the control device 400.

[0221] <Detection Unit 900>

[0222] A detection unit 900 will be described as a modified example of the detection unit 300. It should be noted that the same reference numerals are given to the same components as those of the detection unit 300, and description thereof will be omitted. Fig.24 It is a perspective view of a detection unit 900 which is an example of the measurement device according to the present embodiment.

[0223] The detection part 900 of the measuring device of this embodiment includes a main body 910 and a top part 920. The top part 920 is built into the main body 910 in such a way that the contact 940 is exposed from the opening of the pressing ring 916 of the main body 910. The detection part 300 measures the surface state of the skin by pressing the top part 920 against the skin of the measuring object, such as the wrist, cheek, etc. of a person, in the direction of the arrow P3. The top part 920 rotates in the direction of the arrow R4 with the rotation axis E as the center. It should be noted that the rotation direction is not limited to the direction of the arrow R4, for example, it can be set to rotate in the opposite direction of the arrow R4, and it can also be set to rotate repeatedly in the direction of the arrow R4 and the opposite direction.

[0224] The main body 910 includes a substantially cylindrical casing 911 tapered in the center. The casing 911 is composed of a top cover 912, a side cover 913, a side cover 914, and a bottom cover 915. Each cover of the casing 911 is formed of acrylonitrile / butadiene / styrene copolymer resin (ABS resin) or the like.

[0225] A cylindrical pressing ring 916 having an annular flat surface 916a at the top is screwed to the upper portion of the top cover 912. Inside the pressing ring 916, a contact 940 having a top end 920 is exposed to the outside.

[0226] By pressing the flat surface 916a of the pressing ring 916 against the skin, the pressing direction of the measuring device can be positioned. The distance from the flat surface 916a of the pressing ring 916 to the contact surface of the contact 940 along the direction of the rotation axis E can be changed by changing the amount of screwing to the top cover 912. In addition, the distance from the flat surface 916a of the pressing ring 916 to the contact surface of the contact 940 along the direction of the rotation axis A can be changed. In addition, the pressing force when the contact 940 of the top end 920 contacts the measuring object can be adjusted. It should be noted that the pressing ring 316 is formed of, for example, polymethyl methacrylate resin (PMMA) or the like.

[0227] The pressing ring 916 has a plurality of (six in this embodiment) openings 916h on the side surface. The openings 916h allow air to escape from the space surrounded by the object to be measured and the pressing ring 916.

[0228] The interior of the housing 911 of the main body 910 is the same as the interior of the housing 311 of the detection unit 300 of the second embodiment.

[0229] The contact 940 is a component for contacting the object to be measured by the measuring device. The contact 940 contacts the object to be measured. Depending on the object to be measured and the purpose of the measurement, the surface that the contact 940 contacts may be a flat surface or may have concave and convex surfaces. Below the contact 940, similar to the detection unit 300, there are an acceleration sensor 351 and a force sensor 352.

[0230] The detection unit 900 of the present embodiment further includes a contact 940a. The contact 940a is provided at a position symmetrical to the contact 940 with respect to the rotation axis E. By providing the contact 940a at a position symmetrical to the contact 940 with respect to the rotation axis E, the contact 940 can be brought into contact with the measurement object in a well-balanced manner. In addition, by bringing both the contact 940 and the contact 940a into contact with the measurement object, the magnitude of the vibration generated can be set to be large.

[0231] It should be noted that, in addition to the acceleration sensor 351 and the force sensor 352 below the contact 940, there may be an acceleration sensor and a force sensor below the contact 940a, or there may not be an acceleration sensor and a force sensor. The number of contacts 940a is not limited to one, and two or more contacts may be provided. In addition, the position of the contact 940a is not limited to the position of the object as long as it is in contact with the object to be measured. However, it is desired that the contact 940 is configured to make contact with good balance. The contact 940a is an example of a contact portion.

[0232] <<Seventh Embodiment>>

[0233] In the seventh embodiment, the signal processing performed by the control device will be described. Here, the processing performed by the control device 400 will be described using the detection unit 300A of the second embodiment as an example.

[0234] <Estimated evaluation value>

[0235] The control device 400 uses the measurement results of the detection unit 300A to estimate the moisture level, smoothness, moisture content of the stratum corneum, and the texture of the skin of the subject. In addition, the control device 400 uses the measurement results of the detection unit 300A to estimate the age of the subject.

[0236] <Details of evaluation test>

[0237] Regarding the test subjects, 31 Japanese women aged 20 to 69 and 28 foreign women living in Japan who had given written consent in advance to participate in the test were evaluated. The test subjects removed their makeup before the test, washed their faces, and then stood still in a constant temperature and humidity environment at 23°C and 45% humidity before the measurement.

[0238] First, the cheeks of the subjects were palpated by two specialists. Each specialist evaluated the skin's moisture and smoothness. The moisture of the skin was evaluated in five stages, indicating whether the skin was "moist" or "dry," and the results were expressed numerically. In addition, the smoothness of the skin was evaluated in five stages, indicating whether the skin was "smooth" or "rough," and the results were expressed numerically.

[0239] Next, after the evaluation by the professional evaluator, the same part is measured using the detection unit 300A. The measurement is performed by rotating the contact 340 of the detection unit 300A at an angular velocity of 205 deg / s with the rotation axis A as the center. During the measurement, the acceleration of the three axes when moving on the skin is measured by the acceleration sensor 351. In addition, the force of the six axes when moving on the skin is measured by the force sensor.

[0240] In addition, measurements were performed using a commercially available sensor for evaluating skin conditions. The amount of moisture in the stratum corneum was measured using Skicon-200EX (YAYOI Co. Ltd.). In addition, the state of the skin texture (the quality of the skin texture is expressed numerically) was measured using a video microscope (Skin Visiom II, Shiseido Co. Ltd.).

[0241] Furthermore, statistical models were created for the results measured by the detection unit 300A, the moisture level of the skin and the smoothness of the skin by the professional evaluator, the moisture level of the stratum corneum and the state of the texture by the sensor, and the age of the subject. Furthermore, using the statistical model, the moisture level of the skin, the smoothness of the skin, the moisture level of the stratum corneum, the state of the texture, and the age of the subject were estimated from the results measured by the detection unit 300A.

[0242] <Details of evaluation test>

[0243] Next, the details of the estimation process performed by the control device 400 of the measurement device will be described.

[0244] [Measurement data]

[0245] (1) Acceleration (vibration characteristic quantity)

[0246] The signal processing unit 410 of the control device 400 obtains the three-axis acceleration data from the acceleration sensor 351 of the detection unit 300A. The signal processing unit 410 uses the acceleration component in the rotation direction of the rotating contact 340 among the three-axis acceleration data for analysis. The signal processing unit 410 performs a fast Fourier transform (FFT (fast Fourier transform)) on the acceleration component in the gravity direction and calculates the amplitude spectrum. Specifically, the signal processing unit 410 performs a fast Fourier transform (FFT) on the acceleration data during the period of two rotations of the contact 340 (3512 (milliseconds) = (360 (deg) × 2) / (205 (deg / second)) × 1000) 2 seconds after the start of the measurement, thereby calculating the amplitude spectrum of the frequency 0kHz to 1000kHz. In addition, the signal processing unit 410 averages the calculated amplitude spectrum every 10Hz frequency. As described later, the signal processing unit 410 estimates the average value of the vibration spectrum (100-dimensional vibration spectrum) as the vibration feature value of each subject.

[0247] (2) Force (friction characteristic quantity)

[0248] The signal processing unit 410 of the control device 400 obtains the force data of the six axes from the force sensor 352 of the detection unit 300A. The signal processing unit 410 uses the force component Fx in the rotation direction of the rotating contact 340 and the force component Fz in the pressing direction (the direction perpendicular to the contact surface 341 of the contact 340) to analyze the force data of the six axes. The signal processing unit 410 uses the force component Fx in the rotation direction of the rotating contact 340 and the force component Fz in the pressing direction to calculate the friction coefficient μ using the following formula 1.

[0249] μ=Fx / Fz···(Formula 1)

[0250] Specifically, the signal processing unit 410 calculates the friction coefficient μ for the force data during the period when the contact 340 rotates two times (3512 (milliseconds) = (360 (deg) × 2) / (205 (deg / second)) × 1000) 2 seconds after the start of the measurement. In addition, the signal processing unit 410 obtains the average value of the calculated friction coefficient μ during the period when the contact 340 rotates two times. As described later, the signal processing unit 410 estimates the average value of the friction coefficient μ as the friction characteristic amount of each subject.

[0251] [Calculation of the estimation model]

[0252] The signal processing unit 410 calculates a statistical model for estimating the moisture content of the skin, the smoothness of the skin, the amount of moisture in the stratum corneum, the state of the skin texture, and the age of the subject using the vibration characteristic quantity and the friction characteristic quantity obtained as described above.

[0253] The signal processing unit 410 uses partial least squares regression to construct a statistical model. In this embodiment, the moisture of the skin, the smoothness of the skin, the moisture content of the stratum corneum, the state of the texture, and the age of the subject are respectively set as the target variables. In addition, for each target variable, the vibration characteristic quantity and the friction characteristic quantity or the vibration characteristic quantity calculated above are set as explanatory variables. It should be noted that the statistical model in which the vibration characteristic quantity and the friction characteristic quantity are set as explanatory variables is called model 1. In addition, the statistical model in which the vibration characteristic quantity is set as an explanatory variable is called model 2.

[0254] First, each explanatory variable is standardized so that the mean is 0 and the standard deviation is 1. Next, a statistical model is constructed using partial least squares regression.

[0255] In order to determine the number of components in the statistical model of partial least squares regression, the mean square error (MSE) of the transparent model, the estimated value, and the correlation coefficient between the observed value were investigated by changing the number of components. In the calculation in this embodiment, the 10-fold cross validation method was repeated 20 times to obtain the average value of the mean square error (MSE) and the correlation coefficient.

[0256] For each target variable, Figures 25 to 34 1 is a diagram showing the calculation results of the measuring device according to the seventh embodiment. Each target variable will be described.

[0257] [Skin Moisture]

[0258] Fig.25 This is a graph showing the mean square error (MSE) when the target variable is set to the moisture level of the skin and the number of components is changed. Fig.26 This is a graph showing the correlation coefficient when the target variable is set to the moisture content of the skin and the number of components is changed. Fig.25 , Fig.26 In the chart, X1 is the calculation result of model 1, and Y1 is the calculation result of model 2.

[0259] like Fig.25 As shown, in the case of 5 components in model 1 ( Fig.25 X1a), the mean square error (MSE) is the smallest. In addition, when the number of components in model 2 is 4 ( Fig.25 Y1a), the mean square error (MSE) is the smallest.

[0260] like Fig.26 As shown, in model 1, when the number of components with the smallest mean square error (MSE) is 5 ( Fig.26 In model 2, when the mean square error (MSE) is minimized, the correlation coefficient is the largest when the number of components is 4 ( Fig.26 Y1b), the correlation coefficient is the largest.

[0261] [Skin smoothness]

[0262] Fig. 27 This is a graph showing the mean square error (MSE) when the objective variable is set to the smoothness of the skin and the number of components is changed. Fig.28 This is a graph showing the correlation coefficient when the target variable is set to skin smoothness and the number of components is changed. Fig. 27 , Fig.28 In the chart, X2 is the calculation result of model 1, and Y2 is the calculation result of model 2.

[0263] like Fig. 27 As shown, in the case of 2 components in model 1 ( Fig. 27 X2a), the mean square error (MSE) is the smallest. In addition, when the number of components in model 2 is 1 ( Fig. 27 Y2a), the mean square error (MSE) is the smallest.

[0264] like Fig.28 As shown, in the case of 2 components with the smallest mean square error (MSE) in model 1 ( Fig.28 X2b), the correlation coefficient is the largest. In addition, in the case of the component number 1 with the smallest mean square error (MSE) in model 2 ( Fig.26 Y2b), the correlation coefficient is the largest.

[0265] [Hydration level in stratum corneum]

[0266] Fig.29 This is a graph showing the mean square error (MSE) when the target variable is set to the stratum corneum water content and the number of components is changed. Fig.30 This is a graph showing the correlation coefficient when the target variable is set to the stratum corneum water content and the number of components is changed. Fig.29 , Fig.30 In the chart, X3 is the calculation result of model 1, and Y3 is the calculation result of model 2.

[0267] like Fig.29 As shown, in the case of 3 components in model 1 ( Fig.29 The mean square error (MSE) of X3a) is the smallest. In addition, when the number of components in model 2 is 3 ( Fig.29 The mean square error (MSE) of Y3a) is the smallest.

[0268] like Fig.30 As shown, in the case of 3 components with the smallest mean square error (MSE) in model 1 ( Fig.30 X3b), the correlation coefficient is the largest. In addition, when the number of components in model 2 is 4 ( Fig.30The correlation coefficient is the largest. It should be noted that in the case of 3 components with the smallest mean square error (MSE) in model 2 ( Fig.30 Y3b), becomes a correlation coefficient roughly the same as the component number 4.

[0269] [State of texture]

[0270] Fig.31 This is a diagram showing the mean square error (MSE) when the target variable is set to a texture state and the number of components is changed. Fig.32 This is a graph showing the correlation coefficient when the target variable is set to the texture state and the number of components is changed. Fig.31 , Fig.32 In the chart, X4 is the calculation result of model 1, and Y4 is the calculation result of model 2.

[0271] like Fig.31 As shown, in the case of 2 components in model 1 ( Fig.31 X4a), the mean square error (MSE) is the smallest. In addition, when the number of components in model 2 is 2 ( Fig.31 Y4a), the mean square error (MSE) is the smallest.

[0272] like Fig.32 As shown, in the case of 2 components with the smallest mean square error (MSE) in model 1 ( Fig.32 X4b), the correlation coefficient is the largest. In addition, in the case of the component number 2 with the smallest mean square error (MSE) in model 2 ( Fig.32 Y4b), the correlation coefficient is the largest.

[0273] [Age of the test subject]

[0274] Fig.33 This is a graph showing the mean square error (MSE) when the target variable is set to the age of the subject and the number of components is changed. Fig.34 This is a graph showing the correlation coefficient when the target variable is set to age and the number of components is changed. Fig.33 , Fig.34 In the chart, X5 is the calculation result of model 1, and Y5 is the calculation result of model 2.

[0275] like Fig.33 As shown, in the case of 2 components in model 1 ( Fig.33 X5a), the mean square error (MSE) is the smallest. In addition, when the number of components in model 2 is 2 ( Fig.33 Y5a), the mean square error (MSE) is the smallest.

[0276] like Fig.34 As shown, in the case of 2 components with the smallest mean square error (MSE) in model 1 ( Fig.34 X5b), the correlation coefficient is the largest. In addition, in the case of the number of components 2 with the smallest mean square error (MSE) in model 2 ( Fig.34 Y5b), the correlation coefficient is the largest.

[0277] From the above results, the correlation coefficient can be set high by finding the number of components with the smallest mean square error (MSE) in Model 1 and Model 2. Therefore, in this embodiment, the statistical model with the smallest number of components with the smallest mean square error (MSE) is finally adopted.

[0278] Table 1 shows a table summarizing the number of components with the smallest mean square error (MSE), the mean square error (MSE) of the number of components, and the correlation coefficient for each target variable and each model.

[0279] (Table 1)

[0280]

[0281] From the above results, when the target variables are set as skin moisture, skin smoothness, stratum corneum moisture, texture state and the age of the subject, correlation can be observed in both Model 1 and Model 2. Therefore, it is suggested that the sensory evaluation, skin state and age of the skin can be estimated by using Model 1 (a model using vibration characteristic quantities and friction characteristic quantities as explanatory variables) and Model 2 (a model using vibration characteristic quantities as explanatory variables). In addition, for skin moisture, skin smoothness and stratum corneum moisture, the correlation coefficient of Model 1 (a model using vibration characteristic quantities and friction characteristic quantities as explanatory variables) is larger, which suggests the advantages of using both vibration and friction.

[0282] <<Eighth Implementation Method>>

[0283] In the eighth embodiment, the signal processing performed by the control device will be described. Here, the processing performed by the control device 400 will be described using the detection unit 300A of the second embodiment as an example.

[0284] The touch of two different lotions was evaluated. One was a refreshing lotion and the other was a moisturizing lotion. The application site was set to the cheeks of the face, and the application was performed with a cotton pad. The measurement was carried out three times. The original skin before application, 1 minute after application, and 2 minutes after application.

[0285] The friction coefficient increased for each lotion 1 minute after application. The friction coefficient of the refreshing lotion decreased 2 minutes after application, while the friction coefficient of the moist lotion increased.

[0286] The vibration of the moist lotion decreased 1 minute after application, while the vibration of the refreshing lotion was the same as that of the original skin. Although the vibration of the moist lotion increased 2 minutes after application compared to 1 minute later, it was still lower than the vibration of the original skin. The vibration of the refreshing lotion did not change 2 minutes after application and was the same as that of the original skin.

[0287] like Fig.35 , Fig.36 As shown, it is possible to measure different vibration and friction behaviors with two kinds of lotions. When evaluating an object whose touch changes in a time series, such as lotions, it is difficult to reproduce the same conditions. Since this measuring device can measure vibration and friction at the same time, it is very useful for evaluating an object whose touch changes.

[0288] It should be noted that all aspects of the embodiments disclosed herein are illustrative and non-limiting. The above embodiments may be omitted, replaced, or modified in various ways without exceeding the scope and spirit of the appended claims.

[0289] This application claims priority from Basic Patent Application No. 2019-106429 filed on June 6, 2019, in the Japan Patent Office, and Basic Patent Application No. 2019-196477 filed on October 29, 2019, in the Japan Patent Office, and the entire contents of which are hereby incorporated by reference.

[0290] Description of Reference Numerals

[0291] 1. Measurement device

[0292] 2 Measurement device

[0293] 3. Measurement device

[0294] 100 Testing Department

[0295] 110 Main body

[0296] 111 Housing

[0297] 120 Top

[0298] 122 Lower vibration absorbing member

[0299] 124 Upper vibration absorbing member

[0300] 125 Upper support member

[0301] 130 Connecting shaft

[0302] 140 Contact

[0303] 150 Sensors

[0304] 170 Drive unit

[0305] 200 Control device

[0306] 210 Signal Processing Unit

[0307] 300 Testing Department

[0308] 310 Main body

[0309] 311 Housing

[0310] 320 Top

[0311] 325 Vibration absorbing components

[0312] 332 Magnetic coupling

[0313] 333 Sponge connector

[0314] 334 Slip Ring

[0315] 340 Contact

[0316] 350 Sensors

[0317] 370 Drive unit

[0318] 400 Control Device

[0319] 410 Signal Processing Department

[0320] 500 Testing Department

[0321] 520 Top

[0322] 525 Vibration absorbing components

[0323] 540 Contact

[0324] 550 Sensors

[0325] 600 Control Device

[0326] 610 Signal Processing Department

[0327] 700 Testing Department

[0328] 800 Testing Department

[0329] 900 Testing Department

Claims

1. A measuring device comprising: A contactor, which is used to contact with a measurement object; A sensor, which is provided on the contact head and is used to measure at least the surface state of the measurement object; a driving unit for causing the contactor and the sensor to rotate relative to the measurement object; and a vibration isolation component, which is provided between the driving part and the contact and the sensor, and is used to isolate vibration from the driving part to the contact and the sensor, The measuring device is configured to transmit the driving force generated by the driving unit to the contactor and the sensor while suppressing the vibration generated by the driving unit from being transmitted to the contactor and the sensor. The sensor measures the acceleration and friction generated by the rotational displacement. The measuring device measures the surface state based on the measurement value of the sensor.

2. The measuring device according to claim 1, wherein The above-mentioned sensor includes a vibration sensor and / or a force sensor.

3. The measuring device according to claim 1, wherein The above-mentioned measuring device also includes: A top portion, which includes the contact and the sensor; a connecting member connecting the top end portion and the driving portion; and The main body includes a housing for housing the driving unit. The tip portion includes an upper support member for supporting the contactor and the sensor, and the upper support member includes a contact portion for contacting the measurement object at a position different from the contactor. The main body moves toward the measurement object, so that the tip is pressed against the measurement object. The surface state is measured based on the measurement value detected by the sensor in a state where the distal end portion pressed by the driving portion is displaced.

4. The measuring device according to any one of claims 1 to 3, wherein A temperature sensor is also included.

5. The measuring device according to any one of claims 1 to 3, wherein The vibration isolation component is at least one of a vibration absorbing component, a magnetic coupling, and a sponge coupling.

6. The measuring device according to any one of claims 1 to 3, wherein It also includes a signal processing unit for processing the signal of the sensor.

7. The measuring device according to claim 3, wherein: The upper support member includes a bottom portion and a first contact support member and a second contact support member arranged on an upper surface of the bottom portion. The contacts are fixed to upper portions of the first contact supporting member and the second contact supporting member.

8. The measuring device according to any one of claims 7, wherein: The sensor is fixed to the back side of the contact head, that is, the side opposite to the contact surface of the contact head that contacts the measurement object. The sensor is provided between the first contact supporting member and the second contact supporting member.

9. The measuring device according to any one of claims 1 to 3, wherein: A contact portion for contacting the measurement object is provided at a position different from the contact head.

10. A measuring method for measuring the surface condition of skin using a measuring device, wherein: The above-mentioned measuring device comprises: A contact head, which is used to contact with a measurement object; A sensor, which is provided on the contact head and is used to measure at least the surface state of the measurement object; a driving unit for causing the contactor and the sensor to rotate relative to the measurement object; and A signal processing unit, which is used to process the signal obtained from the above sensor, The sensor measures the acceleration and friction generated by the rotational displacement. The above-mentioned measuring method is performed by the above-mentioned signal processing unit, and includes: calculating a frequency spectrum for a component of the rotation direction of the contactor in the acceleration data output from the sensor; and A vibration feature quantity is calculated from the frequency spectrum, and a target variable is estimated based on the vibration feature quantity using a first statistical model. The first statistical model is a model that uses the vibration feature quantity as an explanatory variable to represent the relationship between the explanatory variable and the target variable.

11. The assay method according to claim 10, wherein The above-mentioned measuring method is used to measure the above-mentioned skin to which cosmetics are applied. The above-mentioned determination method also includes: calculating a friction coefficient using a component in the rotation direction and a component in the pressing direction of the contactor among the force data in the rotation direction of the contactor output from the sensor; and The friction characteristic quantity is calculated according to the friction coefficient, and the target variable is estimated based on the vibration characteristic quantity and the friction characteristic quantity through a second statistical model, wherein the second statistical model is a model that uses the vibration characteristic quantity and the friction characteristic quantity as explanatory variables to represent the relationship between the explanatory variables and the target variable. The target variable is any one of the moisture level of the skin, the smoothness of the skin, the amount of moisture in the stratum corneum, the state of the skin texture, and the age of the subject.

Images