Vibration sensing devices
An embodiment of the present disclosure provides a vibration sensing device, which may include a vibration sensor and at least one vibration component. The vibration sensor has a first resonant frequency, at least one vibration component may be configured to transmit the received vibration to the vibration sensor, and the at least one vibration component may include a liquid arranged in the target cavity and a plate body forming a part of the cavity wall of the target cavity. The at least one vibration component may provide at least one second resonant frequency for the vibration sensing device, and at least one second resonant frequency may be different from the first resonant frequency.
1. A vibration sensing device, comprising:
a vibration sensor having a first resonant frequency; and
at least one vibration component is configured to transmit received vibrations to the vibration sensor, the at least one vibration component comprising a liquid arranged in a target cavity and a plate body forming a part of a cavity wall of the target cavity, wherein
the at least one vibration component provides at least one second resonant frequency for the vibration sensing device, and the at least one second resonant frequency is different from the first resonant frequency.
2. The vibration sensing device of claim 1 , wherein the at least one vibration component is configured to form one or more resonant systems, and one of the one or more resonant systems is composed of the liquid and the plate body.
3. The vibration sensing device of claim 1 , wherein the first resonant frequency is related to structural parameters of the vibration sensor, and the at least one second resonant frequency is related to structural parameters of the at least one vibration component.
4. The vibration sensing device of claim 1 , wherein each of the at least one second resonant frequency is lower than the first resonant frequency.
5. The vibration sensing device of claim 1 , wherein a difference between a peak and a trough of a frequency response curve of the vibration sensing device is in the range of 5 dBV to 15 dBV.
6. The vibration sensing device of claim 1 , wherein the vibration sensing device further comprises an adjusting element, the adjusting element being arranged in the target cavity or being a part of the cavity wall of the target cavity, and the adjusting element being configured to define a size of the target cavity.
7. The vibration sensing device of claim 1 , wherein the target cavity includes a first sub-cavity and a second sub-cavity, the first sub-cavity being configured to contain the liquid, and the second sub-cavity being configured to contain one or more fillers of gas, liquid or solid.
8. The vibration sensing device of claim 2 , wherein the vibration sensor comprises a bone conduction vibration sensor, the bone conduction vibration sensor comprising a housing, an acoustic-electric conversion element, and a vibration transmission element,
the housing generates vibrations in response to an external vibration signal, and the vibration transmission element transmits the vibrations to the acoustic-electric conversion element,
the at least one vibration component is configured to receive vibrations of at least one of the housing and the vibration transmission elements and transmit the vibrations to the acoustic-electric conversion element, wherein the acoustic-electric conversion element has different frequency responses to the vibrations transmitted by the vibration transmission element and the vibrations transmitted by the at least one vibration component.
9. The vibration sensing device of claim 8 , wherein the plate body includes a first plate body and a second plate body, the first plate body and the second plate body divide a space in the housing into a plurality of cavities, and the plurality of cavities include a first cavity defined by the first plate body, the second plate body, and the vibration transmission element, a second cavity defined by the first plate body and a part of the housing, and a third cavity defined by the second plate body and a part of the housing, and the target cavity includes one or more of the plurality of cavities.
10. The vibration sensing device of claim 9 , wherein the target cavity comprises the first cavity.
11. The vibration sensing device of claim 10 , wherein the acoustic-electric conversion element is disposed in the first cavity.
12. The vibration sensing device of claim 11 , wherein the second cavity or/and the third cavity contain gas, and the at least one vibration component further includes the gas contained in the second cavity or/and the third cavity.
13. The vibration sensing device of claim 11 , wherein the at least one vibration component further comprises a vibration pickup element arranged between the housing and the vibration transmission element, and the vibration pickup element is configured to vibrate in response to vibrations of the housing.
14. The vibration sensing device of claim 13 , wherein,
the one or more resonant systems include a first resonant system and a second resonant system,
the first resonant system is composed of the liquid and the plate body, and
the second resonant system is composed of the vibration pickup element, the vibration transmission element, the acoustic-electric conversion element, the liquid and the plate body.
15. The vibration sensing device of claim 9 , wherein the target cavity comprises at least one of the second cavity or the third cavity.
16. The vibration sensing device of claim 15 , wherein the at least one vibration component further comprises a vibration pickup element arranged between the housing and the vibration transmission element.
17. The vibration sensing device of claim 16 , wherein the first plate body and the second plate body comprise a rigid plate, and
the one or more resonant systems include a resonant system formed by the vibration transmission element, the acoustic-electric conversion element, the liquid, the plate, and the vibration pickup element.
18. The vibration sensing device of claim 1 , wherein the vibration sensor comprises an air conduction vibration sensor, and the air conduction vibration sensor comprises an acoustic-electric conversion element and a sound inlet hole.
19. The vibration sensing device of claim 18 , wherein the vibration sensing device further comprises a housing physically connected to the at least one vibration component, and the housing and a part of the vibration sensor form a receiving space for containing the at least one vibration component;
the housing is configured to generate vibrations in response to an external vibration signal; and
the at least one vibration component is acoustically connected to the acoustic-electric conversion element through the sound inlet hole, and the at least one vibration component is configured to receive the vibrations generated by the housing and transmitting the vibrations to the acoustic-electric conversion element through the sound inlet hole.
20. The vibration sensing device of claim 19 , wherein at least part of the plate body is physically connected to the housing, and the target cavity includes a cavity defined by the plate body and at least part of the housing.