JP5250914B2 - Method of supplying sensor or sensor component and artificial sweat base material - Google Patents

Description

  The present invention relates to a composition of artificial sweat, a method for supplying artificial sweat, a sensor having an artificial sweat function, and a sensor component.

  Friction caused by high friction (coefficient of friction) generated by direct or indirect contact with the object to be sensed (detected) when sensing in various parts where the sensor is used Heat and intense vibrations disturb the sensor acceptance signal, causing wear or damage to the sensor or sensor component. To solve these problems, the skin with a human sensory organ to protect the surface of the potential sensor or sensor component (including surrounding materials) or the object to be detected or to stabilize the sensor acceptance signal It is necessary to propose and provide the function of sweat, which is an instantaneous and fluid protective film peculiar to function, and the function of artificial sweat instead.

For example, for a fixed material for protecting a sensor in the prior art, as disclosed in Patent Document 1, a method of using a protective film (a silicon nitride film is fixed) on the pressure sensor surface, disclosed in Patent Document 2 As described in Patent Documents 3 to 4, a protective film (insulating property) is used on a biosensor surface or a chemical sensor surface, as disclosed in Patent Documents 3 to 4. A method using a fixing organic substance, as disclosed in Patent Document 5, a method using a protective film (fixing various metals, various synthetic resins, glass, rubber, etc.) on the surface of an ultrasonic sensor; As disclosed, a method of using a protective film (immobilizing a silica-containing elastomer) on the surface of an electrochemical sensor, or a method for supplying a lubricant in the prior art or available As disclosed in Patent Documents 7 to 9, a method of supplying by an ink jet apparatus, a method of generating an aerosol and spraying oil mist as disclosed in Patent Document 10, and a method disclosed in Patent Document 11 are disclosed. As described above, a method of automatically supplying lubricating oil to a bearing based on a signal obtained from a sensor, a method of automatically supplying lubricating oil for robot traveling, as disclosed in Patent Document 12, and the like. Are known.
JP 2005-181066 A JP 2008-82768 A JP 2007-10321 A JP 2006-220546 A JP 2006-94459 A JP-A-8-193969 JP 2004-351260 A Japanese Patent Laid-Open No. 2003-19790 JP 2002-370384 A JP 2009-226402 A JP 2004-316707 A JP-A-10-216613

  However, in the conventional method, once the sensor peripheral material (hereinafter referred to as sensor component) in which the sensor or the protective film fixed to the sensor surface is internally damaged is damaged, it is difficult to repair. When the sensor component is an organic material, In particular, in the case of a highly flexible material such as an elastomer, a contact state (for example, a tactile signal) with a minute load can be detected more sensitively than a hard material such as an inorganic material. On the smooth surface, the sensor acceptance signal is disturbed or the sensor parts are damaged by the generation of a high coefficient of friction (friction heat) due to the adsorption phenomenon (stiction and stick-slip) and the simultaneous strong vibration. There is a problem such as wear.

  When the sensor component is an inorganic material, a particularly hard material is superior in terms of wear resistance and durability, but when the contact partner material of the sensor component is hard, the contact surface pressure tends to increase, There are problems such as (scratch) and adhesive wear.

  Further, when the mating material that the sensor component contacts is softer than the sensor component, particularly in the case of an elastomeric organic material having high flexibility, there is the same problem as the sensor component of the organic material described above.

  The high coefficient of friction that occurs when the sensor component comes into contact with the vibrations that accompany it causes problems such as the surface temperature of the contact portion becoming high due to the frictional heat, damaging the sensor component, and disturbing the sensor acceptance signal. .

Furthermore, depending on the object to which the sensor component comes into contact, there is a problem that harmful substances (poisonous substances, microorganisms, bacteria, viruses, etc.) contaminate the surface of the sensor component when contacted.
Therefore, the present invention adjusts the coefficient of friction between the sensor component and the contact counterpart surface, stabilizes the sensor reception signal, protects the sensor, reduces wear and frictional heat of the sensor component material and the contact counterpart material, and contacts the contact partner. It is an object to disinfect, sterilize, and clean the mutual contact surfaces of the sensor component and the contact partner surface, which makes it possible to clarify the difference in the friction coefficient of the material and facilitate the discrimination of the material.

  In order to solve the above-described problems, the present invention provides a water-soluble compound (hereinafter referred to as “water-soluble compound”) having at least one OH group bonded to a carbon atom on the surface of a sensor component or a material having a sensor function. By supplying artificial sweat composed of water-soluble compounds) (hereinafter referred to as artificial sweat) and changing the mixing ratio of each base material component of artificial sweat and / or the supply amount of artificial sweat. The main feature is to fluidly control the friction coefficient.

  According to the present invention, by supplying artificial sweat to the surface of the sensor component, adsorption or adhesion between the sensor component and the contact partner surface and generation of a high friction coefficient with respect to the counterpart surface with which the sensor component contacts Wear can be suppressed, and at the same time, the sensor acceptance signal can be stabilized and the sensor or sensor component can be protected.

  A small amount of moisture between the sensor component and the smooth mating contact surface causes an adsorption phenomenon (Laplace pressure), and at the same time as a high friction coefficient, it generates a tremendous vibration that disturbs the sensor acceptance signal. When artificial sweat is supplied, a sufficient fluid film of artificial sweat and the hydroxyl group (OH group) of the functional group of the water-soluble compound lowers the surface tension (or Laplace pressure) of water, causing the adsorption phenomenon and high friction. Generation of a coefficient can be suppressed and a stable sensor acceptance signal can be provided.

  In the contact between the sensor component and the rough contact surface, the true contact area is reduced under the same conditions as the smooth contact surface, and the effect of the roughness improves the effect of suppressing the adsorption phenomenon, For example, in a tactile sensor, the tactile information decreases with a decrease in the contact area (tactile area), resulting in an unclear (weak) tactile sensor acceptance signal. For example, artificial sweat penetrates into parts such as depressions and grooves that cannot be contacted, and the artificial sweat indirectly transmits tactile information to the sensor component, thereby clarifying the sensor acceptance signal.

  For example, on a rough surface such as paper (cellulose fiber) and a highly hygroscopic (or hydrophilic) contact surface, moisture in the artificial sweat penetrates the fiber and at the same time increases the Laplace pressure between the contact surfaces. The friction coefficient can be increased, and the water-soluble compound in the artificial sweat can be adsorbed and protected on the surface of the contact partner surface to suppress wear.

  From the above characteristics, by using artificial sweat, the difference between the high hygroscopic (or hydrophilic) and low hygroscopic (or hydrophobic) materials of the target object in contact with the sensor component is used. The difference in adsorptivity, wettability of artificial sweat or ability to form an artificial sweat film becomes a difference in friction between contact surfaces, and material discrimination can be facilitated.

  Furthermore, the frictional heat between the contact surfaces can be cooled by the supply of artificial sweat between the sensor component and the detection object and the heat of vaporization accompanying the evaporation.

  In addition, disinfecting / sterilizing the surface of the sensor component or the contacted material by using, for example, ethyl alcohol (ethanol) or acetic acid as the water-soluble compound of the base material of artificial sweat. Can be cleaned.

  Preferred embodiments of the present invention will be described below with reference to the drawings. In the description of the drawings, the same elements are denoted by the same reference numerals, and redundant descriptions are omitted. In the drawings, the dimensional ratio does not necessarily match that described.

  First, for the sake of simplicity, a simple sensor component arrangement, a circuit and method for supplying artificial sweat, and the composition of artificial sweat will be described.

(Artificial sweat supply method)
Based on FIG. 1, the arrangement of sensor components and the method for supplying artificial sweat will be described. A pump installed in the upstream of the artificial sweat container (in the case of the ink jet type), containing water 2 which is a base material component of artificial sweat and at least one water-soluble compound 3 which is another base material component of artificial sweat It is preferable to install the artificial sweat on the surface of the sensor 8 or the sensor component material 9 with contact by the pressurizing device 1 such as a pressure sensor 1 such as a vaporizer or liquid feeding by a negative pressure by capillary force. Substrate components 2 and 3 are supplied as artificial sweat 7. Note that there may be a plurality of artificial sweat containers for storing various water-soluble compounds.

(Artificial sweat container)
The artificial sweat container may be a mixture of water having a concentration of at least one water-soluble compound 3 set in the range of 0 to 100% by mass in advance. In this case, the artificial sweat container has a total of at least 1 Individual is enough.

(Supply and timing of artificial sweat)
Regarding the supply timing (or supply amount) of artificial sweat, a reception signal detected from the sensor 8 installed on the surface of the sensor contact portion or the sensor 10 installed inside the sensor component is amplified by the amplifier 11, and the A / It is transmitted to the D converter 12, the microcomputer or the personal computer 13.

(Loop signal control and feedback signal control for artificial sweat supply to protect sensor parts)
A sensor acceptance signal generated by the computer 13 when the sensor 8 or the sensor component 9 comes into contact with the object to be detected, such as a pressure signal, causes high friction in the sensor 8, 10 or the sensor component 9, or damage or When the wear level value, for example, the magnitude, frequency, signal waveform, etc. of the detected reception signal is reached, inverter control or ON-OFF control to the pressurizing device 1 or valve opening / closing control to the control valve 4 etc. The control signal is transmitted and looped or feedback controlled until the sensor acceptance signal returns to a safe value.

  By the control method, the water 2 and at least one water-soluble compound 3 in the artificial sweat 7 are individually sent from the artificial sweat container to the plurality of pipes or the same pipe to remove the solid foreign matter in the artificial sweat. For this reason, it is guided to the perspiration hole 6 for supplying artificial sweat. However, if the artificial sweat container contains a piece of artificial sweat that has been sufficiently filtered in advance, the filtration filter 5 may be omitted.

  When the artificial sweat 7 is sent through a separate pipe, the water 2 and at least one water-soluble compound 3 are instantaneously mixed in the space of the sweat hole 6, and the gap between the sensor component 9 or the sensor 8 (or the inside of the sensor) The artificial sweat 7 is supplied to the surface of the sensor component 9 or the sensor 8 through the hole).

(When artificial sweat is supplied from outside the sensor component)
When the artificial sweat 7 is supplied from the outside of the sensor component 9, the artificial sweat base material component water 2 and at least one water-soluble compound 3 pass through the valve 4 and then the same pipe or individual pipes It passes through a space corresponding to the sweat hole 6 and is supplied to the surface of the sensor 8 or the sensor component 9. At this time, it is desirable to adjust the supply state of the artificial sweat 7 by adding a spray nozzle or the like to the hole 6 part.

(Description of sweat pores)
As shown in FIG. 2, the sweat holes 6 (a and b) are disposed in or on the sensor component 9, and the artificial sweat base material water 2 and at least one water-soluble compound are individually fed. 3 are mixed in a space having a maximum volume of 10 ml of the space sweat hole (b) of the sweat hole 6 and discharged and supplied as artificial sweat 7 to the surface of the sensor component 9 from the sweat hole 6 (a). At this time, the artificial sweat 7 may be in a gas, mist (spray), or liquid state, and a hydrophilic material such as a hydrophilic polymer gel / sol, a hydrophilic fiber, etc. May be encapsulated or introduced.

  When the material of the sensor component 9 in FIG. 2 is an elastic body (elastomer), the artificial sweat 7 is discharged / supplied to the surface of the sensor component 9 due to the pressure caused by the pressure generated upon contact with the detection target.

(Application examples of sensor parts with artificial sweat function)
As an application example of a sensor component having an artificial sweat function, FIG. 3 shows a sensor component 9 equipped in a multi-fingered robot hand, the arrangement of sensors (8, 10), and a partial cross-sectional view of an artificial sweat supply hole. In the contact part of the robot hand that can be equipped with various sensors described later, various sensor component 9 materials described later are used, and artificial sweat supply holes (sweat holes 6) for adjusting friction are equipped.

(Roughness or texture on the surface of sensor parts)
In order to prevent artificial sweat pools (sweat grooves) and unnecessary slip due to artificial sweat on the surface of the sensor component 9 or sensor 8, the surface of the sensor component 9 has a dot diameter or line width of 50 nm to 10 mm and a height of 1 nm. Artificial sweat 7 is secreted and supplied from at least one sweat hole 6 on the surface of the concave portion or / and the convex portion, which forms irregularities of at least one dot pattern and / or line pattern of -10 mm. At this time, the hole diameter of the sweat hole 6 is 1 nm to 10 mm, and each base material component (2, 3) of artificial sweat is secreted and supplied separately or together from the hole.

  As shown in the plan view of FIG. 4, the dot pattern is, for example, a quadrangle (dot pattern 1), a circle (dot pattern 2), a triangle, a polygon, or an irregular protrusion or depression.

  As shown in the plan view of FIG. 4, the line pattern forms a striped uneven shape such as a striped pattern 2 such as a striped pattern 1 or a concentric striped pattern 2.

(Composition of artificial sweat)
Artificial sweat uses water 2 and at least one water-soluble compound 3 having at least one hydroxyl group bonded to a carbon atom as a base component, and water or a water-soluble compound is in the range of 0 to 100% by mass. This is for adjusting the friction coefficient by changing the concentration.

(Description of water-soluble compounds)
The water-soluble compound 3 may be any compound that is water-soluble and has an OH group bonded to a carbon atom. Here, the OH group bonded to the carbon atom is a concept including those contained in a complicated functional group such as a carboxyl group (—COOH) or a phenol group.

  As such a water-soluble compound 3, in addition to water-soluble hydrocarbons having an OH group bonded to a carbon atom, water-soluble alcohols (for example, methanol, ethanol, propanol, isopropyl alcohol, butyl alcohol, alkanediol, Erythritol, glycerin, polyglycerin, xylitol, diglycerin, hexadiol, hexitol, ethylene glycol, propylene glycol, dipropylene glycol, 1,3-butylene glycol, polyethylene glycol, polypropylene glycol, alkylene oxide (ethylene oxide, propylene oxide, butylene) Oxide, etc.), hyaluronic acid, etc.), carboxylic acids (eg, acetic acid, etc.), water-soluble esters having an OH group attached to a carbon atom, Water-soluble ethers having an OH group, include water-soluble halogenated organic compounds having an OH group attached to a carbon atom. Among these, water-soluble alcohols are particularly preferable.

(Additives other than artificial sweat base materials)
For the purpose of further improving the artificial sweat function, additives other than the base component may be added to the artificial sweat base component 2 and 3, and the additive concentration is within the range of 1 mass ppm to 10 mass%. Desirably, for example, a solid lubricant (fluorine-based particles, fluorine-added carbon, amorphous carbon, carbon particles such as graphite and C60, molybdenum disulfide particles, etc.) having a particle diameter of 1 nm to 100 μm is a good example. In this case, the filtration accuracy of the filtration filter 5 of FIG. 1 must be larger than the particle size.

  The artificial sweat 7 is preferably one that does not cause residue or contamination on the surface of the detection target. In this case, for example, ethanol or methanol is a good example.

  In high temperature environments or environments where it should not ignite or ignite, the water soluble compound of artificial sweat is preferably a flame retardant material such as ethylene glycol.

(Explanation of sensor parts)
A sensor component 9 shown in FIG. 1 is a sensor peripheral material in which a protective film of a sensor or a sensor or a sensor having a direct contact with an object to be detected is provided, and is made of an inorganic material (cement, refractory, magnetic material, metal). Wrought products, glass, etc.) and / or organic materials (chemical synthetic resins, polymer gels or sols, rubber, synthetic fibers, cellulose, etc.).

(Sensor type)
The types of sensor 8 or sensor 10 shown in FIG. 1 are all physical sensors or chemical sensors (including biosensors) that can use artificial sweat. For example, in a force sensor, a pressure sensor, an optical pressure sensor, Semiconductor pressure sensors, SAW force sensors, strain sensors, ultrasonic sensors, pressure-sensitive conductive sensors, etc., and optical sensors include, for example, light quantity sensors, ultra-high speed optical sensors, phototransistors, photon sensors, image sensors, semiconductor image sensors , Color sensor, optical phase sensor, polarization application sensor, etc., and for temperature sensor, contact temperature sensor, non-contact temperature sensor, current collector temperature sensor, SAW radiation temperature sensor, optical fiber temperature sensor, etc. In the speed sensor, for example, an optical Doppler speed sensor, an optical integrated speed sensor, an optical fiber gyroscope, -Loop, integrated acceleration sensors, magnetic-type acceleration sensor, the chemical sensor, ion sensor, and the like molecular recognition sensor.

(Disinfection and sterilization of sensor parts and the surface of detection objects using artificial sweat)
In order to disinfect and sterilize the contact surface or surface between the sensor component 9 or the sensor 8 and the detection target shown in FIG. 1, for example, ethanol or acetic acid is used as the water-soluble compound 3 of the artificial sweat 7. In the case of an ethanol aqueous solution, it is preferable to supply artificial sweat 7 having an ethanol volume concentration in the range of 70 to 90% (15 ° C. environment).

(Cleaning the surface of sensor parts and detection objects with artificial sweat)
In order to clean the contact surface or surface between the sensor component 9 or the sensor 8 shown in FIG. 1 and the detection target, artificial sweat of water and / or a water-soluble compound having 1 to 3 carbon atoms is desirable. The artificial sweat is preferably supplied (flushing) at a flow rate of 10 ml / second or less per cm ² and at a flow rate as high as possible.

Examples 1-7

  First, artificial sweat obtained by changing the mass concentration of water-soluble compound (ethanol in this case) in water within a range of 0 to 100% by mass is dropped onto a smooth (surface roughness Ra 0.01 μm) and clean acrylic resin surface. The drop shape of artificial sweat of each concentration was photographed with a digital microscope, and the contact angle (ability to form an artificial sweat film) was confirmed from the drop shape.

  Furthermore, the artificial sweat of the water-soluble compound was supplied in a fixed amount (0.06 ml) according to the concentration to the contact surface between the silicone rubber human finger type tactile sensor (strain gauge) and the acrylic resin in FIG. The coefficient of friction was measured within the range of 0.25 N) and reciprocation (0 to 0.02 m / s), and the effectiveness of the artificial sweat was confirmed.

(Comparative Example 1)
The coefficient of friction was measured in the same manner as in Examples 1 to 7, except that no artificial sweat was supplied.

  Friction experiments were carried out in the same manner as in Examples 1-7 except that the sliding contact surface was paper (PPC paper, roughness Ra 2.38 μm).

  The difference between the acrylic surface and paper (PPC paper) when the artificial sweat is supplied (0.06 ml) and when it is not supplied to the silicone rubber human finger type tactile sensor is vertically arranged inside. Comparison was made with signals from two strain gauges.

(Evaluation)
First, on the acrylic surface, the measurement results of the contact angle of artificial sweat in the ethanol concentration range of 0 to 100% by mass are shown in FIG.

  As shown in FIG. 6, the water contact angle (surface tension) decreases instantaneously as the ethanol concentration in artificial sweat increases, so the water contact angle can be reduced by intentionally changing the ethanol concentration. It can be easily understood that it can be adjusted instantaneously.

  This is because the hydroxyl group (OH group), which is a functional group in the water-soluble compound (in this case, ethanol), which is the base component of artificial sweat, which is the main feature of the present invention, is another base component water. Adsorbs to molecules and detection objects (here acrylic surface), weakens the surface tension of water, and as a result, the ability of artificial sweat to form a film instantly changes with the concentration of water-soluble compounds or hydroxyl groups, ie, ethanol concentration You can understand that you can change and adjust

Table 1 shows the contact angle measurement results and the friction experiment results of Examples 1 to 7.

  It can be understood that the coefficient of friction can be changed as shown in the results of Table 1 as the contact angle (film forming ability or adsorption ability) of the artificial sweat shown in FIG. 6 changes.

  When the silicone rubber human finger type tactile sensor shown in FIG. 5 has a coefficient of friction exceeding about 1 with respect to the acrylic surface, the silicone rubber breaks with time and causes great damage to the internal strain sensor. I know.

  When a sensor acceptance signal that damages such a sensor, sensor component, or detection target is detected, an appropriate friction coefficient can be adjusted if artificial sweat with an appropriate supply amount or water-soluble compound concentration is supplied. It can be easily understood that the sensor or the sensor component or the detection object can be protected.

  FIG. 7 shows the relationship between the friction coefficient and the ethanol concentration in water in Examples 1 to 7 (with artificial sweat) and Comparative Example 1 (without artificial sweat).

  In order to protect the sensor in contact with the acrylic surface of the silicone rubber human finger type tactile sensor, the concentration of the water-soluble compound (ethanol) should be approximately 20% by mass or more from the approximate curve of FIG. Good. However, in the function of “grabbing” the robot hand as shown in FIG. 5, the friction coefficient is too low, and it is preferable to set the concentration of the water-soluble compound (ethanol in the embodiment) as low as possible.

  Further, as shown in FIG. 7, it can be understood that the variation of the friction coefficient tends to decrease as the concentration of the water-soluble compound (ethanol) increases.

  In other words, since the sensor or sensor component is attracted to or separated from the object to be detected, such as an adsorption phenomenon (stiction phenomenon) or stick-slip on the contact surface, such a condition causes severe vibration. The sensor detection operation below is not preferable for the sensor, such as disturbing the sensor acceptance signal.

  Against such a problem, by adjusting the concentration of the water-soluble compound in the artificial sweat (ethanol concentration in the examples), it is possible to suppress the violent vibration and realize stable contact.

  As shown in Table 1 and Comparative Example 1 results shown in FIG. 7, it can be seen that when there is no artificial sweat, a higher coefficient of friction is exhibited than when artificial sweat is supplied (Examples 1 to 7).

  FIG. 8 shows the results of Example 8.

  As shown in FIG. 8, when the silicone rubber human finger type tactile sensor shown in FIG. 5 comes into contact with the surface of the paper (PPC paper), the abrasion of the paper (PPC paper) generated when the artificial sweat is in contact with water alone. It is understood that a water-soluble compound (ethanol in this case) in artificial sweat is suppressed.

  FIG. 9 shows the results of Example 9.

  As shown in FIG. 9, in the coordinate position of the received signals of the two tactile sensors (strain gauges A and B) arranged vertically in the silicone rubber human finger type tactile sensor of FIG. When there is no artificial sweat, it is found that it is difficult to distinguish between the acrylic resin as the contact object and paper (PPC paper).

  Here, by supplying artificial sweat and increasing the concentration of the water-soluble compound (ethanol in this case), the acrylic resin and paper (PPC) of the contact object at the plot coordinate positions of the sensor A signal and the sensor B signal It can be understood that the sheet is separated and identification (identification) is facilitated.

  From the results of these Examples 1 to 9, the concentration of water and at least one water-soluble compound (ethanol is used in the examples) of the base material component of artificial sweat is changed, and / or whether or not artificial sweat is supplied Thus, it is possible to understand the functions of controlling the friction of the sensor, the sensor component, or the detection object, protecting those materials from abrasion, suppressing the significant vibration caused by the contact, and facilitating the discrimination of the contact object.

  Perhaps the meniscus effect and molecular adsorptivity by water molecules of the base material component of artificial sweat, the adsorptivity of the hydrophilic group (ie hydroxyl group) of the water-soluble compound that is another base material component, and the hydrophobic group in the water-soluble compound It is considered that the adsorptivity of (or lipophilic group) and the ability to form an artificial sweat film control the coefficient of friction with the sensor, sensor component, or detection target, and exhibit the above functions.

FIG. 1 is a schematic cross-sectional view showing a preferred embodiment of the present invention. FIG. 2 is a schematic perspective view and a partial cross-sectional view subsequent to FIG. 1 showing a preferred embodiment of the present invention. FIG. 3 is a schematic perspective view and a partial cross-sectional view of an application example (multi-fingered robot hand) according to a preferred embodiment of the present invention. FIG. 4 is a schematic plan view relating to a concavo-convex pattern on the surface of a sensor or sensor component following FIG. 2, showing a preferred embodiment of the present invention. FIG. 5 is a perspective view of the internal configuration of the silicone rubber human finger type tactile sensor (strain sensor) used in Examples 1-7. FIG. 6 is a measurement photograph of contact angle according to concentration of artificial sweat (water and ethanol) according to Examples 1-7. FIG. 7 is a graph showing the relationship between the coefficient of friction and the artificial sweat alcohol concentration in Examples 1-7. FIG. 8 is a photograph of the paper surface after execution comparing the presence or absence of alcohol (ethanol) in artificial sweat in Example 8. FIG. 9 is a graph comparing two strain sensor (tactile sensor) signal outputs of the human finger-type tactile sensor (FIG. 5) in Example 9 according to the presence or absence or the concentration of artificial sweat (no artificial sweat, artificial sweat (water) ), Artificial sweat (ethanol 50 mass%)).

DESCRIPTION OF SYMBOLS 1 ... Pump or pressurization apparatus, 2 ... Water, 3 ... Water-soluble compound, 4 ... Valve, 5 ... Filtration filter, 6 ... Sweat hole, 7 ... Artificial sweat 8 ... external sensor, 9 ... sensor parts (sensor peripheral material or sensor protection material), 10 ... internal sensor, 11 ... amplifier (sensor amplifier), 12 ... A / D converter , 13 ... Information processing of sensor acceptance signal by microcomputer or personal computer, 14 ... Feedback control signal for adjusting supply amount of artificial sweat

Claims (6)

An artificial sweat base material comprising at least one water-soluble compound having at least one hydroxy group (OH group) bonded to a carbon atom, wherein the water-soluble compound has a concentration range of 0 to 100% by weight in water. A sensor or a sensor component having a function of supplying a surface with friction within a range of 10 ml / second or less per 1 cm ^{2 of} surface area. A solid lubricant having a particle size range of 1 nm to 10 μm in a material other than the water-soluble compound according to claim 1 in a concentration range of 1 mass ppm to 10 mass% in the artificial sweat base material according to claim 1. The sensor or sensor component according to claim 1, which has a function of supplying a material added to the artificial sweat substrate. The sensor or sensors the surface of the component of claim 1 or 2, wherein, in a range of dot diameter or line width 50Nm～10mm, at least one dot of the height of the dot diameter or line width 1nm~10mm and / Alternatively, the sweat supplying the artificial sweat base material according to claim 1 or the artificial sweat base material containing the additive according to claim 2 from the surface of the concave portion and / or the surface of the convex portion of the concavo-convex structure comprising at least one line. A sensor or sensor component having a hole and having at least one sweat hole having a diameter range of 1 nm to 10 mm and a maximum space volume of 10 ml.   The supply amount or supply concentration of the artificial sweat base material according to claim 1 or the artificial sweat base material containing the additive according to claim 2 is controlled within the supply amount range and the concentration range according to claim 1 and claim 2. The sensor or sensor component according to claim 1, which has a function of controlling friction with the object to be detected. A sensor or sensor component for supplying an artificial sweat substrate according to claim 1 by gravity dropping or pressurizing device or capillary force or natural or heating vaporizing device, or any combination thereof. Is compressed by the claims 3-4, wherein the sensor and / or sensor component and the elastic deformation of claim 3 wherein the sweat pores due to contact with the object to be detected, supplies the artificial sweat substrate according to claim 1, wherein the sensor Or sensor parts.