Pressure-sensitive sensor
A pressure-sensitive sensor and pressure-sensitive layer technology, which is applied in instruments, measurement of the property force of piezoelectric devices, measuring devices, etc., can solve the problems of non-sensitive areas and complex structures in the 6-dimensional part of the resistance on the sensor side. Improved detection reliability and reasonable settings
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no. 1 example
[0035] refer to figure 1 with 2 , to describe the first embodiment of the present invention.
[0036] figure 1 is a schematic diagram of the pressure-sensitive sensor according to the first embodiment. figure 2 is in figure 1 Cross-sectional view at line A-A in . exist figure 1 Among them, the pressure-sensitive sensor 1 is a piezoelectric sensor in which a central electrode 2, a piezoelectric material layer 3 serving as a pressure-sensitive layer, an outer electrode 4, a coating 5, and a lead-out wire 10 with an insulating coating and 11 are laminated and formed into the shape of a coaxial cable. Such as figure 2 As shown, the lead wires 10 and 11 are arranged in close contact with the center electrode 2 .
[0037] For the center electrode 2, common metal single conductors can be used, but here an electrode in which a metal coil is surrounded by insulating high polymer fibers is used. The piezoelectric material layer 3 is composed of a composite piezoelectric mat...
no. 2 example
[0053] refer to Figure 5 with 6 , to describe the second embodiment of the present invention. Figure 5 with 6 is a schematic diagram of the pressure-sensitive sensor 1 according to this embodiment. This embodiment is different from the first embodiment in that the lead wire 18 is connected at the end portion S to either one of the center electrode 2 and the outer electrode 4 . here, Figure 5 is a schematic diagram of a case where the lead wire 18 is connected to the external electrode 4 at the tip portion, Image 6 is a schematic diagram of a case where the lead wire 18 is connected to the center electrode 2 at the tip portion.
[0054] With the above configuration, since either one of the center electrode 2 and the outer electrode 4 is connected to the lead-out wire 18 at the tip portion S, only the outer electrode 4 is connected in the case where the mechanical strength of the center electrode 2 is greater than that of the outer electrode 4, for example. Connected t...
no. 3 example
[0060] refer to Figure 8 , to describe the third embodiment of terminal processing according to the present invention.
[0061] exist figure 1 In the shown first embodiment, it has been described that the end portion S is sealed with a protective portion (not shown) made of a heat-shrinkable tube, resin, etc. for insulation protection, and then the end portion is covered with a conductive member as necessary. S, make the external electrode 4 conduct with the conductive element, so as to shield the end portion S.
[0062] In particular, this embodiment is characterized in that the tip portion S of the first embodiment is covered with a conductive rubber cap 21 . For example, a heat-shrinkable conductive rubber cap is used, and the inner diameter of the conductive rubber cap 21 is set to be slightly smaller than the outer diameter of the outer electrode 4 . Therefore, after contraction, the conductive rubber cap 21 is not only mechanically engaged with the external electrod...
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