专利快速检索-快速检索全球专利，免费商用专利数据库-IPRDB

1. 发明申请

US20230123365A1 SENSOR AND SENSOR PROCESSING DEVICE 有权
公开(公告)号：US20230123365A1
公开(公告)日：2023-04-20
申请号：US18068793
申请日：2022-12-20
申请人： Murata Manufacturing Co., Ltd.
发明人： Kenichi MORI , Toru TOMINAGA
IPC分类号： G01H11/08 , G01B7/16
摘要： A sensor is provided that includes a piezoelectric body; an electric resistor disposed on a first principal surface of the piezoelectric body; a vibration detection electrode disposed on a second principal surface of the piezoelectric body; a resistance voltage dividing circuit that has a first input terminal and a voltage dividing point; and a feedback processing circuit that has a second input terminal. Moreover, the electric resistor is connected to the voltage dividing point and the first input terminal, and the vibration detection electrode is connected to the second input terminal.

2. 发明授权

US11473967B2 Piezo stack drive of a vibration limit switch with front-mounted fastening mechanism 有权
公开(公告)号：US11473967B2
公开(公告)日：2022-10-18
申请号：US16936131
申请日：2020-07-22
申请人： VEGA GRIESHABER KG
发明人： Dominik Fehrenbach , Julian Epting
IPC分类号： G01H11/08 , G01D5/48 , B06B1/06 , G01F23/296 , G01H13/00
摘要： An assembly arrangement for connecting a membrane of a vibration sensor with a drive unit such that vibrations of the drive unit are transmitted to the membrane and vibrations of the membrane are transferred to the drive unit, wherein the assembly arrangement is formed as a cylindrical sleeve, having on one end a fastening section for indirectly or directly fastening to the membrane or an element connected with the membrane, and an insertion opening for the drive unit on the other end.

3. 发明授权

US11456409B2 Micro-vibration sensor and preparation method thereof 有权
公开(公告)号：US11456409B2
公开(公告)日：2022-09-27
申请号：US16771190
申请日：2019-10-31
申请人： JILIN UNIVERSITY
发明人： Zhiwu Han , Kejun Wang , Honglie Song , Junqiu Zhang , Daobing Chen , Linpeng Liu , Binjie Zhang , Tao Sun , Dakai Wang , Changchao Zhang
IPC分类号： H01L41/312 , G01H11/08 , H01L41/297
摘要： A micro-vibration sensor and preparation method thereof. The method includes a metal sheet is coated with first curing material, and first curing material is cured into first cured layer; piezoelectric thin film element is attached to edge of first cured layer; one side, attached with piezoelectric thin film element, of first cured layer is vertically placed into second curing material, and second curing material is cured into second cured layer; and metal sheet is removed to obtain micro-vibration sensor. Due to fact that piezoelectric thin film element is arranged at a crack tip, during micro-vibration, stress in stress field of crack tip is rapidly increased due to crack stress deformation, and stress signal is efficiently converted into electric signal; and micro-vibration sensor has characteristics of being low in detection limit and high in accuracy.

4. 发明申请

US20220283023A1 ONLINE DETECTION DEVICE AND METHOD FOR PIEZOELECTRIC DEVICE 有权
公开(公告)号：US20220283023A1
公开(公告)日：2022-09-08
申请号：US17631617
申请日：2020-08-03
申请人： Beijing Taifang Technology Co., Ltd.
发明人： Chaoliang DU , Hongfeng GUO
IPC分类号： G01H11/08 , G06F3/041
摘要： An online detection device and method for a piezoelectric device. The device comprises an elastic wave sensor, a sell-detection circuit, a working circuit, a switch circuit and a control chip. The switch circuit is connected with the elastic wave sensor, the self-detection circuit and the working circuit. The sell-detection circuit is connected with the control chip and is used for, When being connected to the elastic wave sensor, generating, a self-detection signal according to the capacitance of the elastic wave sensor. The working circuit is connected with the control chip and is used for, when being connected to the elastic wave sensor, forming a touch detection circuit and detecting an external touch by means of the elastic wave sensor so as to obtain a detection signal. The control chip is connected with the switch circuit and is used for outputting a control signal to the switch circuit such that the elastic wave sensor is connected to the working circuit or the self-detection circuit The received self-detection signal is compared with a reference value to obtain a self-detection result of the elastic wave sensor according to the comparison result, or obtain, according to the received detection signal, a touch pressure generated by the external touch.

5. 发明授权

US11424839B2 Methods and apparatus for acoustic backscatter communication 有权
公开(公告)号：US11424839B2
公开(公告)日：2022-08-23
申请号：US15931344
申请日：2020-05-13
申请人： Massachusetts Institute of Technology
发明人： Junsu Jang , Fadel Adib
IPC分类号： H04B11/00 , G01H11/08 , H04R17/00 , H04R1/44 , H04B13/02
摘要： A communication system may communicate by backscattered acoustic signals that propagate through a liquid or solid. In this system, one or more transmitters may transmit acoustic signals that travel to, and are reflected by, an acoustic backscatter node. The backscatter node may modulate the amplitude and/or phase of the reflected acoustic signals, by varying the acoustic reflectance of a piezoelectric transducer onboard the node. The modulated signals that reflect from the backscatter node may travel to a microphone and may be decoded. The backscatter node may include sensors, and the uplink signals may encode sensor readings. The backscatter node may harvest energy from the downlink acoustic signals, enabling the node and the sensors to be battery-free. Multiple backscatter nodes may communicate concurrently at different acoustic frequencies. To achieve this, each node may have a matching circuit with a different resonant frequency.

6. 发明申请

US20220136892A1 ULTRASONIC SENSOR 有权
公开(公告)号：US20220136892A1
公开(公告)日：2022-05-05
申请号：US17149488
申请日：2021-01-14
申请人： Shenzhen Fugui Precision Ind. Co., Ltd.
发明人： PENG XU , JIAN-SHE FENG , CHEN-YANG MA , JIAN-LI XU
IPC分类号： G01H11/08 , G01R31/12 , H01L41/25 , H01L41/053 , H01L41/047
摘要： An ultrasonic sensor, which is installed on a test device, includes a shell, one end is open, the other end is closed surface; a cover sheet, bonded to the open end of the shell; a copper foil, a lower surface of the copper foil is bonded to an inner bottom surface of the closed surface of the shell; a piezoelectric chip, a lower surface of the piezoelectric chip is bonded to a upper surface of the copper foil, and when the test device vibrates, the piezoelectric chip converts a vibration signal into a voltage response signal; a cable, a positive electrode is welded on a upper surface of the piezoelectric chip, and a negative electrode is welded on the upper surface of the copper foil, configured to connect to an external detection device and transmit the voltage response signal to the external detection device.

7. 发明申请

US20220118925A1 Systems And Methods For Piezoelectric Sensor Microphone Window Keypad Entry 有权
公开(公告)号：US20220118925A1
公开(公告)日：2022-04-21
申请号：US17072585
申请日：2020-10-16
申请人： Ford Global Technologies, LLC
发明人： Pietro Buttolo , Joshua Wheeler , Scott Amman , Nicholas Colella
IPC分类号： B60R16/037 , H04R7/04 , B60R11/02 , G01H11/08
摘要： Disclosed are systems and methods that uses a window as a keypad entry system that functions as a replacement for a keyless entry keypad in a vehicle. The system includes a vehicle window functional as a keypad using piezoelectric transducers that capture resonance from the vehicle window when pressure waves (e.g., generated by voice commands or taps) impact the glass. A transducer controller amplifies the vibrations from the vehicle window user tap or spoken commands and triangulates the signal to localize a position of the origination point of the tap, which may be mapped to a respective numeric or cardinal input value. The system may include a low power mode that receives input while the vehicle is off.

8. 发明授权

US11287311B2 Water meter and systems 有权
公开(公告)号：US11287311B2
公开(公告)日：2022-03-29
申请号：US17032525
申请日：2020-09-25
申请人： South East Water Corporation
发明人： Andrew Forster-Knight , Juan Londono , Eddy Mofardin , Ninad Mohan Dharmadhikari , Jonathan Philip Crook , Matthew Swan , Colin Neil Gehrig , Thomas James Merry , Owen David Neeson , Joseph Ignatius Maria Van Der Plas
IPC分类号： G01H11/08 , G01M3/28 , E03B7/07 , G01F1/05 , G01F1/58 , G01F1/66
摘要： Some embodiments relate to a vibration sensor. The vibration sensor comprises: a sensor base to couple to a vibration source; a piezoelectric transducer coupled on a first side of the transducer to the sensor base; at least one conductor coupled to the piezoelectric transducer; and a seismic weight positioned on a second side of the piezoelectric transducer; wherein the sensor base, the piezoelectric transducer and the seismic weight are aligned along an axis and arranged so that relative movement between the sensor base and the seismic weight arising from the vibration source causes a current to be generated in the piezoelectric transducer and an output signal corresponding to the generated current is detectable on the at least one conductor.

9. 发明申请

US20220065691A1 DETECTION SENSOR AND DETECTION DEVICE INCLUDING THE SAME 有权
公开(公告)号：US20220065691A1
公开(公告)日：2022-03-03
申请号：US17398052
申请日：2021-08-10
申请人： HOSIDEN CORPORATION
发明人： Tsutomu MATSUSHITA , Hiroyuki HARANO , Ryuji AWAMURA , Hidenori MOTONAGA , Kensuke NAKANISHI
IPC分类号： G01H11/08 , G01J5/34
摘要： A detection sensor according to an aspect of the invention includes a vibratable film constituted by a piezoelectric film, a case accommodating the vibratable film, and a circuit board. The vibratable film is configured to be irradiated with infrared rays and thereby generate first electric signals through a pyroelectric effect, and configured to be vibrated by sound waves and thereby generate second electric signals through a piezoelectric effect. The case includes a transmissive part. The transmissive part is configured to transmit at least infrared rays and disposed on one side in a first direction relative to the vibratable film to face the vibratable film. The first direction is a thickness direction of the vibratable film. The circuit board is fixed to the case and disposed on the other side in the first direction relative to the vibratable film. The circuit board has a sound hole to input therethrough sound waves.

10. 发明授权

US11215483B2 Sensor systems 有权
公开(公告)号：US11215483B2
公开(公告)日：2022-01-04
申请号：US16538560
申请日：2019-08-12
申请人： Goodrich Corporation
发明人： Brian J. Smith , Alan M. Giles
IPC分类号： G01D11/10 , G02B27/64 , G01H11/08
摘要： A sensor assembly includes a frame defining a sensor axis having opposing endplates with axially extending supports. The opposing endplates are connected by a pair of axially extending side beams. A suspended mass is within an interior of the frame suspended from the supports of the frame. A plurality of piezoelectric material layers are operatively connected to sides of respective spacers opposite the frame to damp vibrations of the suspended mass.

你已经成功收藏专利！

检索式保存成功!

IPRDB

热门服务

关于我们

友情链接

联系方式