Deformation Detection Sensor And Production Of The Same
A detection sensor, magnetic sensor technology, applied to instruments, measuring devices, other household appliances, etc., can solve the problems of foreign body sensation and detection accuracy deterioration, and achieve the effects of easy manufacturing, improved stability, and good riding comfort.
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preparation example Construction
[0089] In the manufacturing method of the deformation detection sensor of the present invention, the magnetic resin may exist on the upper surface or the lower surface of the polymer foam. Magnetic resin may also be present inside the polymer foam.
[0090] The magnetic sensor of the present invention can be a sensor generally used to detect changes in a magnetic field, such as a magnetoresistive element (for example, a semiconductor compound magnetoresistive element, an anisotropic magnetoresistive element (AMR), a giant magnetoresistive element (GMR) or a tunnel Magnetoresistive elements (TMR)), Hall elements, inductors, MI elements, fluxgate sensors, etc. From the viewpoint of high sensitivity over a wider range, a Hall element is preferable.
[0091] In addition, the above-mentioned deformation detection sensor can be used for purposes other than the cushion pad of a vehicle, such as the hand or skin of a robot, the surface pressure distribution of a bed, the road surface...
Embodiment 1
[0095] Preparation of magnetic resin
[0096]Drop into the polyol A of 42.6 parts by weight in the reaction vessel (with 3-methyl-1,5-pentanediol, trimethylolpropane and adipic acid as the polyester polyol prepared by starting raw material, OH value is 56 , a functionality of 3; manufactured by Kuraray Co., Ltd., F-3010) and 42.6 parts by weight of polyol B (3-methyl-1,5-pentanediol adipate, with an OH value of 56 and a functionality of 2; manufactured by Kuraray Co., Ltd., P-2010) and dehydrated under reduced pressure for 1 hour while stirring. Then, the inside of the reaction vessel was switched to a nitrogen atmosphere. Next, 14.8 parts by weight of toluene diisocyanate (2,4 configuration = 80%; manufactured by Mitsui Chemicals, Inc., trade name Cosmonate T-80) was added to the reaction vessel, and the temperature inside the reaction vessel was kept at 80°C. The reaction was carried out for 3 hours to synthesize a prepolymer A (NCO%=3.58%) having a terminal isocyanate g...
Embodiment 2 to 5 and comparative example 1 to 2
[0118] Prepare the polymer foam containing magnetic resin in the same manner as in Example 1, use the conditions in Table 1, and measure the elastic modulus of magnetic resin, the average cell diameter of polymer foam, the change of magnetic flux density, and the same as in Example 1. The results of performance stability and foreign body sensation are shown in Table 1. Table 1 also shows the NCO index and monohydric alcohol content of the magnetic resins.
[0119]
[0120] As shown in Table 1, the examples of the present invention are excellent in magnetic flux density variation (Gauss), performance stability, and foreign body sensation. The content of monohydric alcohol in Example 2 is more, and the modulus of elasticity decreases. In addition, the average diameter of the cells near the magnetic resin in the polymer foam becomes larger. Therefore, the magnetic flux density varies greatly, but the performance stability is slightly lowered. The content of monohydric alcoh...
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