阅读说明：本技术 一种皮肤触觉传感器及其制作方法 (A kind of skin touch sensor and preparation method thereof ) 是由 王强 许鹏俊 于 2019-08-21 设计创作，主要内容包括：本发明公开了一种皮肤触觉传感器,包括柔性基底层和导电复合材料层,所述导电复合材料层上设有若干凹槽结构,其特征在于所述皮肤触觉传感器电压与压强的相关系数由将传感器放置于人体手臂内侧皮肤上,并与Mind Ware多导生理仪相连接,通过万能材料试验机INSTRON对不同尺寸的传感器进行循环往复的压缩实验采集数据拟合而成。本发明还公开了一种皮肤触觉传感器的制备方法。本发明的有益效果为与任何一种纺织品结合制成能够测量小压强的皮肤触觉压力传感器,改变皮肤触觉传感器只适用于大压强测量的缺点,并且能够直接穿着,直接贴合于人体表层皮肤,可用于测试人体在静态或动态时受到的压力。(The invention discloses a kind of skin touch sensors, including flexible base layer and conducing composite material layer, the conducing composite material layer is equipped with several groove structures, it is characterized in that the related coefficient of the skin touch sensor voltage and pressure is by sensor to be placed on human arm inside skin, and lead physiograph with Mind Ware more and be connected, data are acquired to the compression experiment that various sizes of sensor moves in circles by universal testing machine INSTRON and are fitted.The invention also discloses a kind of preparation methods of skin touch sensor.Beneficial effects of the present invention are the skin tactile pressure sensor for being made to measure small pressure in conjunction with any textile, change the shortcomings that skin touch sensor is only applicable to big pressure measurement, and it can directly wear, it is mounted directly on body surface's skin, can be used for testing the pressure that human body is subject to when either statically or dynamically.)

1. a kind of skin touch sensor, including flexible base layer and conducing composite material layer, on the conducing composite material layer Equipped with several groove structures, it is characterised in that the related coefficient of the skin touch sensor voltage and pressure is by putting sensor It is placed on human arm inside skin, and leads physiograph with Mind Ware more and be connected, pass through universal testing machine INSTRON is fitted the compression experiment acquisition data that various sizes of sensor moves in circles.

2. skin touch sensor as described in claim 1, it is characterised in that the flexible base layer is natural cellulosic fabrics.

3. skin touch sensor as described in claim 1, it is characterised in that the flexible base layer is regenerated cellulose fabric.

4. claims 1 to 3 arbitrarily as described in skin touch sensor, it is characterised in that the first wife of the conducing composite material matches Than for 0.5 part of carbon black, 0.5 part of nano silica, 20 parts of auxiliary agent, 10 parts of silicon rubber.

5. a kind of preparation method of skin touch sensor, it is characterised in that include the following steps:

(1) fabric is cut into sizeable cloth, flatiron ironing is whole；

(2) adjacent pairs of two square of several groups is drawn on cloth, the spacing between adjacent square is 5mm；

(3) square of one more dot of vehicle is enclosed in square with conductive yarn；

(4) conductive yarn is in the length for reserving 10cm on one side of cloth as conducting wire；

(5) conducing composite material is coated on one side without conductive yarn conducting wire to cloth front, cover mold, and be compacted；

(6) after room temperature natural vulcanization forms for 24 hours, mold is removed, forms several groove structures on conducing composite material layer, it will be adjacent Two pairs of squares are cut, and the conducing composite material being coated on the gap between two squares is removed, and obtain sensor；

(7) electric conductivity of multimeter measurement sensor is used；

(8) preliminary experiment is carried out to sensor on universal testing machine INSTRON using homemade simulation human skin；

(9) sensor is placed on human arm inside skin, and leads physiograph with Mind Ware more and is connected, pass through ten thousand The compression experiment that energy Material Testing Machine INSTRON moves in circles to various sizes of sensor；

(10) it acquires, analyze data, to fit the related coefficient of skin touch sensor voltage and pressure.

6. the preparation method of skin touch sensor as claimed in claim 5, it is characterised in that the side length of the square is 5- 15mm。

Technical field

The invention belongs to technical field of electronic materials more particularly to a kind of skin touch sensor and preparation method thereof.

Background technique

The measurement of tactile pressure distribution is widely used with analysis in numerous areas.Flexible touch sensation sensor can be used for The monitoring of the relevant all kinds of contact pressure distributed intelligences such as human health and safety.Currently studying intensively gradually deeply, especially to tactile It is the development of softness haptic perception force sensor technologies, creates and includes various new touchings such as manufacturing industry, service trade, medical treatment and entertainment Feel application field, and is increasingly suitable for the virtual reality system of every profession and trade.Such as in terms of medical instrument, for Sigmoidoscope This kind of medical instrument directly contacted with patient's organ can be covered with flexible touch sensation sensor in equipment surfaces to perceive and patient The contact pressure of organ simultaneously feeds back to doctor, and doctor can take timely measure the generation for avoiding excessive contact pressure, to subtract The pain and operation risk of few patient.Such as in the new development of computer and peripheral man-machine interface, flexible touch sensation sensor technology It is a new research direction in computer technology.Such as touch screen and effective haptic feedback system.In this frontier, have Necessity has one flexibly, is easily installed with the touch sensor of high sensitivity and detects power and pressure information.In short, can supervise The flexible touch sensation sensor for surveying contact pressure has broad application prospects.

Currently, the touch sensor studied both at home and abroad is mainly the piezoresistive effect for utilizing sensor itself, it is suitable only for measuring Big pressure is unable to satisfy the demand of intelligence wearing aspect.

Summary of the invention

To solve the above-mentioned problems, the present invention provide a kind of piezoresistive effect using between sensor and skin can measure it is small The skin touch sensor of pressure, the specific technical solution that the present invention takes is:

A kind of skin touch sensor, including flexible base layer and conducing composite material layer, the conducing composite material layer It is equipped with several groove structures, it is characterised in that the related coefficient of the skin touch sensor voltage and pressure is by by sensor It is placed on human arm inside skin, and leads physiograph with Mind Ware more and be connected, pass through universal testing machine INSTRON is fitted the compression experiment acquisition data that various sizes of sensor moves in circles.

Further, the flexible base layer is natural cellulosic fabrics.

Further, the flexible base layer is regenerated cellulose fabric.

Further, first wife's proportion of the conducing composite material is 0.5 part of carbon black, 0.5 part of nano silica, auxiliary agent 20 parts, 10 parts of silicon rubber.

The present invention also provides a kind of preparation methods of skin touch sensor, include the following steps:

(1) fabric is cut into sizeable cloth, flatiron ironing is whole；

(2)

Adjacent pairs of two square of several groups is drawn on cloth, the spacing between adjacent square is 5mm；

(3) square of one more dot of vehicle is enclosed in square with conductive yarn；

(4) conductive yarn is in the length for reserving 10cm on one side of cloth as conducting wire；

(5) conducing composite material is coated on one side without conductive yarn conducting wire to cloth front, cover mold, and be compacted；

(6) after room temperature natural vulcanization forms for 24 hours, mold is removed, forms several groove structures on conducing composite material layer, it will Adjacent pairs of two square is cut, and the conducing composite material being coated on the gap between two squares is removed, and must be sensed Device；

(7) electric conductivity of multimeter measurement sensor is used；

(8) preliminary experiment is carried out to sensor on universal testing machine INSTRON using homemade simulation human skin；

(9) sensor is placed on human arm inside skin, and leads physiograph with Mind Ware more and is connected, led to Cross the compression experiment that universal testing machine INSTRON moves in circles to various sizes of sensor；

(10) it acquires, analyze data, to fit the related coefficient of skin touch sensor voltage and pressure.

Further, the side length of the square is 5-15mm.

Beneficial effects of the present invention are to be made to measure the skin tactile tension of small pressure in conjunction with any textile Force snesor changes the shortcomings that skin touch sensor is only applicable to big pressure measurement, and can directly wear, and directly fits In body surface's skin, it can be used for testing the pressure that human body is subject to when either statically or dynamically.

Detailed description of the invention

Schematic diagram is made for skin touch sensor in Fig. 1；

Fig. 2 is the test connection schematic diagram of skin touch sensor；

Fig. 3 is the voltage and compression stress signal schematic representation of 5mm × 5mm specification sensor acquisition；

Fig. 4 is the voltage and compression stress signal schematic representation of 10mm × 10mm specification sensor acquisition；

Fig. 5 is the voltage and compression stress signal schematic representation of 15mm × 15mm specification sensor acquisition；

Fig. 6 is the measured value comparison diagram between the voltage and compression stress of 10mm × 10mm specification sensor；

Fig. 7 is the relational graph between the voltage and compression stress of 10mm × 10mm specification sensor；

Fig. 8 is the measured value comparison diagram between the voltage and compression stress of 15mm × 15mm specification sensor；

Fig. 9 is the relational graph between the voltage and compression stress of 15mm × 15mm specification sensor；

Figure 10 is the voltage and compression stress signal schematic representation of 15mm × 15mm specification transducer range test；

Figure 11 is that the measured value between the voltage and compression stress of the test of 15mm × 15mm specification transducer range compares Figure.

Specific embodiment

The present invention is described in further detail below with reference to embodiment.

What embodiment illustrated in fig. 1 showed skin touch sensor involved by the present invention is made process, includes the following steps:

(1) natural cellulosic fabrics and/or regenerated cellulose fabric are cut into sizeable cloth 1, flatiron ironing is whole；

(2) square is drawn on cloth 1；

(3) square of one more dot of vehicle is enclosed in square with plating silver yarn 2；

(4) plating silver yarn is in the length for reserving 10cm on one side of cloth 1 as conducting wire 3；

(5) conducing composite material 4 is coated to 1 front of cloth (one side of no plating silver yarn conducting wire 3), then covered equipped with semicircle The convex portion of shape, the mold 5 that radius is about 1mm, and be compacted；

(6) after room temperature natural vulcanization forms for 24 hours, mold is removed, forms several groove structures 6 on conducing composite material layer, Finally obtain to obtain sensor 7.

Embodiment illustrated in fig. 2 shows connection type when involved skin touch sensor test, connects computer, Mind Ware leads physiograph, Instron-3365 universal testing machine and skin touch sensor more.

The metal pressure head of Instron-3365 universal testing machine is wrapped up with medical proof fabric or insulating tape, and Above pressure head plus insulation board is fixed.Sensor is fixed on the pressure head of insulation with double-sided adhesive；

Metal holder catches on the reserved conductive yarn of sensor (plating silver yarn) respectively, connects the sensor to Mind Ware is led on physiograph more；

The switch that Mind Ware leads physiograph, Instron-3365 universal testing machine more is opened, it is soft to open Biolab Part sets experiment parameter, and software parameter setting is as shown in table 1；

The parameter setting of the compression circulation experiment of table 1

The inboard arm of experimental subjects is placed on Instron-3365 universal testing machine platform, is started the cycle over reciprocal Compression experiment.

It is voltage and the pass of pressure signal of the sensor of different specifications and sizes of Mind Ware acquisition as in Figure 3-5 System's figure.Top curve figure is the case where I nstron-3365 universal testing machine applies pressure, and lower graph is sensor The voltage of test, each second 100 signaling points, voltage amplification factor be 1000 times, the time of measuring of the two is identical.

From the figure 3, it may be seen that the electrode area due to sensor is excessively small, contact of the sensor with human skin is affected, is led Cause the impact of performance of sensor unsatisfactory.

By Fig. 4,5 it is found that the rule of voltage and pressure change has consistency on the whole.The sensor of 10mm × 10mm Voltage fluctuated in 0.65V-1.15V, pressure changes within the scope of 0-0.65KPa.The voltage of the sensor of 15mm × 15mm It is fluctuated in 0.53V-0.75V, pressure changes within the scope of 0-1KPa.Electrode size is 10mm × 10mm, 15mm × 15mm Sensor can be used for the measurement of skin tactile pressure.

Fig. 6-7, Fig. 8-9 are the relational graphs between the voltage and compression stress of different size size sensor, be respectively by The image that Figure 4 and 5 obtain after data processing.

The rule of pressure and voltage change known to Fig. 6-7 has consistency on the whole.The biography of specification 10mm × 10mm The linear relationship of sensor voltage and pressure is y=0.747x+0.629 (independent variable is pressure, and dependent variable is voltage), voltage and pressure Strong related coefficient is 0.997581, degree of fitting 0.995.It follows that the voltage of the sensor of specification 10mm × 10mm with Pressure linear relationship is significant and high-positive correlation.It can be calculated suffered by sensor by the voltage of measurement in pressure test Pressure.

By Fig. 8-9 it is found that the rule of pressure and voltage change has consistency on the whole.The biography of specification 15mm × 15mm The linear relationship of sensor voltage and pressure is y=0.238x+0.535 (independent variable is pressure, and dependent variable is voltage), voltage and pressure Strong related coefficient is 0.990575, degree of fitting 0.981.It follows that the voltage of the sensor of specification 15mm × 15mm with Pressure linear relationship is significant and high-positive correlation.It can be calculated suffered by sensor by the voltage of measurement in pressure test Pressure.

Fitting result is as shown in table 2:

2 fitting result of table

As shown in Table 2, the linear relationship of homemade sensor is significant and high-positive correlation, related coefficient 0.99 with On.Wherein specification is that the fitting degree of the sensor of 10mm × 10mm is higher, and related coefficient reaches 0.997.And related coefficient is got over The stability of height, sensor is also better.

The sensitivity coefficient of sensor is as the important indicator for measuring sensor, and the sensitivity coefficient of sensor directly closes It is the precision to strain measurement.It refers to the ratio of sensor output quantity changes delta y input quantity changes delta x in steady operation Value, i.e. output-input characteristic curve slope.As shown in Table 2, the sensitivity of specification 10mm × 10mm sensor is 0.747, rule The sensitivity of lattice 15mm × 15mm sensor is 0.238.It follows that the sensitivity of two kinds of sensors is all very high, may be implemented The detection of slight pressure.Wherein specification is that the sensitivity of the sensor of 10mm × 10mm is more preferable, and the precision of measurement is more accurate.

The hysteresis of different size sensor is more as shown in table 3:

The hysteresis of 3 sensor of table compares

Table 3 it is found that voltage, pressure from starting to the time difference to reach to peak value to be respectively 0.054s and 0.044s.Due to In experimentation, be by a people with two computers test software under time point, only ideally think test be simultaneously Start.Because being influenced by human error, so some thousandths of second of this difference can be ignored.It can be considered that two kinds Specification is 10mm × 10mm, and the hysteresis of the sensor of 15mm × 15mm is almost without sensor response is rapid, very sensitive.

Range test is carried out to the sensor of 15mm × 15mm, the maximum pressure of range test is set as 8N.Situation such as Figure 10- Shown in 11.

By Figure 10-11 analysis it is found that the linear relationship of the sensor is y=0.102x+0.564, related coefficient is 0.981, degree of fitting 0.962, pressure changes within the scope of 0-8KPa.It follows that while increasing pressure, sensor Performance is still good, and the range of sensor meets the measurement of human body tactile pressure.

Those skilled in the art will be seen that, can be without departing substantially from its wide in range concept of the invention to above-mentioned implementation Example is modified.It will therefore be appreciated that the present invention is not limited to disclosed specific embodiments, but is intended to covering by appended claims It is required that the modification in the spirit and scope of the concept of the present invention of definition.