5 results about "Primary resonance" patented technology

The application discloses an electromagnetic coupling sensing device, a signal measuring method and an electronic device. A frequency generating module is configured to generate a set frequency signal; a first resonance module is configured to generate a primary resonance signal based on the set frequency signal; a second resonance module is configured to be connected with the first resonance module through a coupling capacitor to generate a secondary resonance signal based on the primary resonance signal; wherein the second resonance module comprises a coil arranged in a Z direction, a ferrite arranged in the coil, and the height of the coil is higher than the ferrite; the coil can bear a weight to be measured to generate a deformation to change the frequency of the secondary resonance signal; and a echo acquisition and processing module is configured to be connected with the second resonance module to acquire the secondary resonance signal and output a voltage signal changed according to the secondary resonance signal.

An electromagnetic coupling sensing device includes a frequency generation module, a first resonant module, a second resonant module, and an echo acquisition and processing module. The first resonant module generates a primary resonant signal based on the frequency setting signal generated by the frequency generation module. The second resonant module couples with the first resonant module through a coupling capacitance to generate a secondary resonant signal based on the primary resonance signal. The second resonant module includes a coil. A ferrite is provided in the coil and a height of the coil is higher than the ferrite. The coil is capable of carrying a weight to be measured to deform such that an intrinsic frequency of the electromagnetic coupling sensing device changes. The echo acquisition and processing module collects the secondary resonant signal and outputs a voltage signal changing according to the intrinsic frequency.

To provide a lightweight sound insulating panel having high sound insulating performance.SOLUTION: In the sound insulation panel 1 including the concavo-convex structure 2, a thickness T of a member constituting the concavo-convex structure 2 is 0.1 mm or more and 20 mm or less, a tensile modulus of elasticity of the member constituting the concavo-convex structure 2 is 0.1 GPa or more, a product of a primary resonance frequency f [Hz] of out-of-plane vibration of the sound insulation panel 1 and a side length L [m] is 80 [Hz·m] or more. A quotient of a height H [m] from the lowest part to the highest part of the uneven structure 2 and a side length L [m] is 0.01 or more and 0.7 or less, and a projected area ratio of a projected area excluding the uneven structure 2 to the whole projected area projected in the thickness direction is less than 20%.SELECTED DRAWING: Figure 1

The present application relates to the field of bulk acoustic wave resonators, and specifically relates to an edge structure and a filter. The edge structure comprises an edge protrusion structure provided between a bottom electrode and a top electrode of the edge structure. The edge protrusion structure comprises a first protrusion layer and a second protrusion layer stacked in a direction away from a substrate. The first protrusion layer is formed of a material having a high dielectric constant, and the second protrusion layer is formed of a material having a high acoustic resistance. Accordingly, the first protrusion layer should be located on the side close to the bottom electrode, and the second protrusion layer should be located on the side close to the top electrode. In this way, due to the presence of a metal material having high acoustic impedance, a high acoustic impedance mismatch can be achieved, thereby improving Rp. Moreover, due to the presence of the first protrusion layer, the electric field intensity of a second functional region and a third functional region outside a primary resonance region can be reduced, and secondary resonance can be suppressed, enabling the curve below spurious to be smooth.

An electromagnetic coupling sensing device includes a frequency generation module, a first resonant module, a second resonant module, and an echo acquisition and processing module. The first resonant module generates a primary resonant signal based on the frequency setting signal generated by the frequency generation module. The second resonant module couples with the first resonant module through a coupling capacitance to generate a secondary resonant signal based on the primary resonance signal. The second resonant module includes a coil. A ferrite is provided in the coil and a height of the coil is higher than the ferrite. The coil is capable of carrying a weight to be measured to deform such that an intrinsic frequency of the electromagnetic coupling sensing device changes. The echo acquisition and processing module collects the secondary resonant signal and outputs a voltage signal changing according to the intrinsic frequency.