CN108204873B - Magnetic capture non-inductive torque sensor - Google Patents
Magnetic capture non-inductive torque sensor Download PDFInfo
- Publication number
- CN108204873B CN108204873B CN201611182168.4A CN201611182168A CN108204873B CN 108204873 B CN108204873 B CN 108204873B CN 201611182168 A CN201611182168 A CN 201611182168A CN 108204873 B CN108204873 B CN 108204873B
- Authority
- CN
- China
- Prior art keywords
- hollow
- torque
- permanent magnet
- torque detection
- sensor
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
- G01L3/00—Measuring torque, work, mechanical power, or mechanical efficiency, in general
- G01L3/02—Rotary-transmission dynamometers
- G01L3/04—Rotary-transmission dynamometers wherein the torque-transmitting element comprises a torsionally-flexible shaft
- G01L3/10—Rotary-transmission dynamometers wherein the torque-transmitting element comprises a torsionally-flexible shaft involving electric or magnetic means for indicating
- G01L3/101—Rotary-transmission dynamometers wherein the torque-transmitting element comprises a torsionally-flexible shaft involving electric or magnetic means for indicating involving magnetic or electromagnetic means
- G01L3/104—Rotary-transmission dynamometers wherein the torque-transmitting element comprises a torsionally-flexible shaft involving electric or magnetic means for indicating involving magnetic or electromagnetic means involving permanent magnets
Landscapes
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- General Physics & Mathematics (AREA)
- Force Measurement Appropriate To Specific Purposes (AREA)
Abstract
The invention discloses a magnetic capture non-inductive torque sensor, which comprises: the device comprises a torque detection shaft, a hollow three-dimensional curved surface permanent magnet pair, a hollow quasi-parallel radiation energy source, a hollow monocrystalline silicon battery piece glue dripping component, a hollow torque detection processing circuit and a shell sleeve component of a sensor. The hollow three-dimensional curved surface permanent magnet pair consists of an outer wrapping ring permanent magnet and an inner committee ring permanent magnet; the hollow quasi-parallel radiation energy source is a semiconductor radiation device manufactured by a special process; the glue dripping component of the hollow monocrystalline silicon battery piece is a specially-matched energy converter matched with a hollow quasi-parallel radiation energy source; the torque detection circuit arranged on the high-strength torque detection elastic shaft only uses electric energy provided by the hollow monocrystalline silicon battery piece glue dripping assembly; the invention adopts the technology of the hollow three-dimensional curved permanent magnet, and two bearings of the existing torque sensor are removed; by adopting the technology of a hollow quasi-parallel radiation energy source and a hollow monocrystalline silicon battery piece glue dripping component, a dynamic power supply device of a slip ring type torque sensor and a coil type torque sensor is replaced. By adopting the multi-point continuous group emitting technology of the light emitting devices and the track arrangement and arrangement technology of the light receiving devices, the high-speed outcoupling output of dynamic torque signals is realized.
Description
Technical Field
The present invention relates to a sensor; in particular to a magnetic capture non-inductive torque sensor with a brand-new technology.
Technical Field
In the prior art, conventional torque sensors are usually selected for torque detection of the rotating body, and include: phase difference type torque sensors, slip ring type torque sensors or coil type torque sensors.
The phase difference type torque sensor is gradually eliminated due to the heavy volume and poor torque measurement precision of a low-speed area and a high-speed area.
The sliding ring type torque sensor is easy to generate heat due to the dynamic friction of the conducting ring, so that the torque measurement of more than 6000 rpm is difficult to realize.
The coil type torque sensor has an open-loop magnetic circuit structure, so that radiation pollution of an electromagnetic field and electromagnetic interference of an external space are caused easily. In particular lightning.
The above existing torque sensors all have common defects that: the device is easy to be interfered by external electromagnetic waves and is difficult to realize the ultra-high speed torsion measurement in industrial fields.
Disclosure of Invention
Aiming at the technical defects of the existing products, the invention provides a magnetic capture non-inductive torque sensor with a brand-new technical idea. The new concept of ' permanent magnet magnetic capture ' radiation energy source ' is put forward for the first time. The invention relates to a magnetic capture device, which is an assembly body of two sets of coaxially locked permanent magnet pairs which mutually generate axial and radial magnetic repulsion acting force and plays an innovative technology of properly limiting a rotating shaft by a rotating shaft support frame. The "non-inductive" of the present invention clearly indicates that the electronic circuit technology employed by the magnetic capture non-inductive torque sensor does not have an "electromagnetic coil". The torque measuring shaft of the magnetic capture non-inductive torque sensor can not be separated from the sensor shell body, and the shaft has the technical characteristics of moderate restriction.
To achieve the above object, the present invention provides a magnetic capture non-inductive torque sensor, comprising: the device comprises a high-strength torque detection elastic shaft, a hollow three-dimensional curved surface permanent magnet pair, an quasi-parallel hollow radiant energy source, a hollow monocrystalline silicon battery piece glue dripping assembly, a hollow torque detection processing circuit, an interface circuit, a disc type dynamic balance bearing frame, a sensor shell body and a shell body end cover; a detection strain gauge electrically connected with the bridge is adhered to the high-strength torque detection elastic shaft;
the hollow three-dimensional curved surface-shaped permanent magnet pair comprises: the sensor comprises a sensor shell, a sensor outer shell cover, a sensor inner shell cover, a high-strength torque detection elastic shaft, a hollow outer wrapping ring permanent magnet and a hollow inner committee ring permanent magnet, wherein the sensor outer shell cover and the sensor outer shell cover are respectively provided with a sensor outer shell end cover and a sensor outer shell end cover;
the quasi-parallel hollow radiation energy source is a semiconductor radiation device manufactured by a special process, has the specifications of a single full ring and a double full ring, has the frequency domain of 845-855nm wave band, and is powered by constant direct current electric energy. The energy source is fixed on the end cover of the outer shell;
the glue dripping component of the hollow monocrystalline silicon battery piece is a specially-matched energy converter matched with a hollow radiation energy source, and the energy converter generates constant and stable direct current electric energy with the load capacity required by design under the action of the hollow radiation energy source.
The hollow torque detection processing circuit consists of two parts, namely a torque detection circuit arranged on the high-strength torque detection elastic shaft and a torque processing circuit arranged on the shell body, wherein the torque detection circuit arranged on the high-strength torque detection elastic shaft only uses load electric energy provided by the hollow monocrystalline silicon solar energy glue dripping component, and the torque processing circuit arranged on the shell body of the sensor is powered by a switching power supply in a direct current manner.
The interface circuit is composed of a power interface circuit and a signal interface circuit, the power interface circuit completes adaptation and transformation of electric energy of a field power supply, and the signal interface circuit realizes optical isolation of internal signals and interface transmission signals.
According to the magnetic capture non-inductive torque sensor, by adopting the novel technical scheme of the hollow three-dimensional curved surface permanent magnet pair, the hollow radiation energy source and the hollow monocrystalline silicon battery piece glue dripping component, the major technical problem that torque measurement data of the torque sensor is easily interfered by external electromagnetic interference is thoroughly solved, the problem of larger volume of the torque sensor is optimized, the major technical problem of long service life of the torque sensor during ultrahigh-speed operation is optimally solved, the production problem of harsh technological requirements in the process of processing precision of working parts of the torque sensor and assembling of the whole machine is effectively solved, and the technical problem of rust damage maintenance of a bearing arranged in the torque sensor is thoroughly solved.
The completely new technical solution of the present invention is further described in detail by the accompanying drawings and embodiments.
Drawings
FIG. 1 is a schematic view of a hollow three-dimensional curved surface-shaped 'magnetic capture' permanent magnet structure according to the present invention;
FIG. 2 is a schematic view of a quasi-parallel hollow core radiant energy source of the present invention;
FIG. 3 is a schematic view of a glue dropping assembly of the hollow monocrystalline silicon battery piece of the invention;
FIG. 4 is a schematic flow chart of a torque detection processing circuit and an interface circuit of the magnetic capture non-inductive torque sensor according to the present invention;
FIG. 5 is a general assembly view of a magnetic capture, non-inductive torque sensor of the present invention;
Detailed Description
FIG. 1 is a schematic view of a three-dimensional curved surface "magnetic capture" structure of the present invention. As shown in fig. 1, the magnetic capture structure is composed of a hollow three-dimensional curved surface outer annular permanent magnet 1 and a hollow three-dimensional curved surface inner annular permanent magnet 2. The outer contour of the hollow solid curved surface-shaped outer wrapping ring permanent magnet 1 is a cylinder with a part of fixed radius, the inner contour is a hollow solid curved surface shape, and the magnetic field of the permanent magnet 1 is characterized by being converged inwards; the outer contour of the hollow three-dimensional curved surface inner power ring permanent magnet 2 is a three-dimensional curved surface, the inner contour is a hollow three-dimensional column hole, and the magnetic field of the permanent magnet 2 is in an outward divergence characteristic. The magnetizing polarity of the permanent magnet of the hollow outer wrapping ring 1 is opposite to that of the permanent magnet 2 of the hollow inner committee ring, and the permanent magnets are in an action state of repelling like poles.
FIG. 2 is a schematic view of a quasi-parallel hollow radiant energy source according to the present invention. As shown in fig. 2, the quasi-parallel hollow core radiant energy source has two types, namely: a hollow single full ring type and a hollow double full ring type. The hollow full-double ring type is used for a torque sensor of small beef rice, and the hollow single full-ring type is used for a torque sensor of large beef rice.
The quasi-parallel hollow radiation energy source adopts a direct current electric energy driving mode, is installed in a clamping and locking mode, the total thickness of the radiation energy source is about 7.1 mm, and is packaged by resin adhesive. Radiant energy sources come in a variety of specifications.
FIG. 3 is a schematic view of a glue dropping assembly of the hollow monocrystalline silicon battery piece of the invention. As shown in fig. 3, the glue dripping assembly has a front side and a back side, the single crystal silicon battery piece surface is the front side, and the point surface with the bonding pad is the back side; the overall thickness of the glue-dripping assembly is about 2.6 mm. The glue-drop assembly also has single full-ring and double full-ring specifications.
FIG. 4 is a logic schematic diagram of the hollow torque detection processing circuit and the interface circuit of the magnetic capture type torque sensor product of the present invention. As shown in fig. 4, the hollow torque detection circuit includes; AD537, AD581, an operational amplifier integrated block, a power amplifier device, a light emitting device, a temperature compensation device and the like. The hollow torque processing circuit comprises; the three-terminal regulator, the optical signal catches the receiver, the integrated package of logic gate, power amplifier device, short-circuit protection etc.. The interface circuit includes: the three-terminal regulator, the operational amplifier integrated block, the current stabilization driving module and the like.
FIG. 5 is a general assembly view of a magnetically captured non-inductive torque sensor product of the present invention. As shown in fig. 5, the sensor includes: the sensor comprises a sensor shell sleeve body 1, a high-strength torque detection elastic shaft 2, a three-dimensional curve surface-shaped outer wrapping ring permanent magnet 3, a three-dimensional curve surface-shaped inner committee ring permanent magnet 4, a quasi-parallel hollow radiation power source 5, a hollow monocrystalline silicon battery piece glue dripping assembly 6, a disc type bearing balancing stand 7, a hollow torque detection circuit 8, a shell sleeve body end cover 9, a hollow torque processing circuit 10, an interface circuit 11, a bottom cover plate 12 and a dustproof sealing plate 13.
Specifically, by pasting the detection strain gauge on the high-strength torque detection elastic shaft 2 and electrically connecting the detection strain gauge and the high-strength torque detection elastic shaft, the mechanical shearing variable of the shaft is converted into the resistance value variable quantity of the electric parameter.
The functional characteristics of the circuit are realized by welding the components of the hollow torque detection processing circuit and the interface circuit PCB.
The electric parameter output of the torque detection value of the shaft part is realized by carrying out torque calibration and aging treatment on the shaft part.
Through the installation of the hollow monocrystalline silicon battery piece glue dripping component 6 and the hollow torque detection circuit 8 on the disc type bearing balancing stand 7, the torque value output of the high-strength torque detection elastic shaft component corresponding to the digital electric parameters with linear torque change rate is realized.
The power interface circuit is aligned with the direct current power supply of the parallel hollow radiation energy source, so that the energy action form conversion between input energy and output energy is realized.
The direct-current carrier charge energy of the glue dripping component of the hollow monocrystalline silicon battery piece is effectively generated through the energy radiation effect of the quasi-parallel hollow radiation energy source on the glue dripping component of the hollow monocrystalline silicon battery piece.
By using the direct current load electric energy generated by the hollow monocrystalline silicon battery piece glue dripping assembly aiming at the torque detection circuit on the high-strength torque detection elastic shaft, the stable operation of the torque detection circuit is thoroughly realized without any electromagnetic interference from the outside.
The high-frequency light emitter is driven by the multi-point continuous mass emitter on the hollow torque detection PCB, so that the quantitative transmission of the high-strength torque detection elastic torque signal is realized.
The multi-point continuous mass-sending signal undistorted receiving is realized by capturing the optical receiving device arrangement and the logic gate integrated block device editing and processing technology adopted on the hollow torque processing PCB.
The high-strength torque detection elastic shaft 2 with the two ends pressed and fixed to the inner annular permanent magnet is coaxially arranged between the sensor shell sleeve body assembly with the seat and the outer annular permanent magnet shell sleeve body end cover pressed and fixed to the outer annular permanent magnet, and friction-free moderate rotation of the high-strength torque detection elastic shaft between the sensor shell sleeve body with the seat and the outer annular permanent magnet shell sleeve body end cover is achieved.
The unique technical characteristics of the magnetic capture non-inductive torque sensor are as follows: the magnetic capture non-inductive torque sensor adopts the technology of a magnetic field constrained hollow three-dimensional curved surface outer wrapping ring permanent magnet and a hollow three-dimensional curved surface inner outsourcing ring permanent magnet, and two bearings in the existing torque sensor are removed; a dynamic power supply device of a slip ring type torque sensor and a coil type torque sensor is replaced by adopting a hollow quasi-parallel radiation energy source and a hollow monocrystalline silicon battery piece glue dripping component. By adopting the multi-point continuous group emitting technology of the light emitting device and the track distribution capture technology of the light receiving device, the high-speed outcoupling of the dynamic torque signal is realized.
It should be noted that the contents not described in more detail in this specification should be subject to the basic knowledge known to those skilled in the relevant art.
Claims (5)
1. A magnetic capture, non-inductive torque transducer, comprising: the device comprises a high-strength torque detection elastic shaft, a hollow three-dimensional curved surface permanent magnet pair, an quasi-parallel hollow radiant energy source, a hollow monocrystalline silicon battery piece glue dripping assembly, a torque detection processing circuit, an interface circuit, a disc type dynamic balance bearing frame, a sensor outer shell part and a shell sleeve body end cover; a detection strain gauge electrically connected with the bridge is adhered to the high-strength torque detection elastic shaft;
the hollow three-dimensional curved surface-shaped permanent magnet pair comprises: the high-strength torque detection device comprises a hollow outer-wrapping ring permanent magnet and a hollow inner-committee ring permanent magnet, wherein the hollow outer-wrapping ring permanent magnet is fixed on a sensor shell sleeve body with a seat and a shell sleeve end cover, and the hollow inner-committee ring permanent magnet is fixed on two sides of a shaft of a high-strength torque detection elastic shaft;
the radial magnetic field force and the axial magnetic field force of the outer wrapping ring permanent magnet of the hollow three-dimensional curved surface are in an inward convergent technical characteristic; the radial magnetic field force and the axial magnetic field force of the hollow internal power-off ring permanent magnet are characterized by an external dispersion technology; the outer contour of the structure body of the hollow internal power-off ring permanent magnet is smaller than the inner contour of the structure body of the hollow external power-off ring permanent magnet; the hollow internal power-off ring permanent magnet is integrally constrained in an inner contour three-dimensional curved surface of the hollow external ring permanent magnet, and two sets of hollow internal power-off ring permanent magnets which are coaxially locked and generate axial magnetic repulsion acting force and radial magnetic repulsion acting force are integrally constrained in a pair of hollow external ring permanent magnets, so that the technical effect of 'magnetic capture' of the high-strength torque detection elastic shaft is achieved;
the quasi-parallel hollow radiation energy source semiconductor radiation device is driven by constant direct current electric energy with a radiation frequency domain of 845-855nm, is installed in a clamping and locking mode, and is fixed on the end cover of the outer shell;
the hollow monocrystalline silicon battery piece glue dripping component is a constant-stability direct-current electric energy device which is matched with a quasi-parallel hollow radiation energy source and generates the load capacity required by design;
the torque detection processing circuit consists of two parts, namely a torque detection circuit board arranged on the high-strength torque detection elastic shaft and a torque processing circuit board arranged on the outer shell body with the seat, wherein the torque detection circuit arranged on the high-strength torque detection elastic shaft only uses electric energy provided by the glue dripping component of the hollow monocrystalline silicon battery piece, and the torque processing circuit arranged on the outer shell body with the seat is powered by a switching power supply in a direct current manner;
the interface circuit consists of a power interface circuit and a signal interface circuit, the power interface circuit completes the adaptation and transformation of the electric energy of the field power supply, and the signal circuit realizes the adaptation of internal signals and interface transmission signals;
the detection strain gauge is used for pressing and fixing the high-strength torque of the inner committee ring permanent magnet on two sides to detect the elastic shaft and electrically connecting the elastic shaft, so that the mechanical shearing variable of the shaft is converted into the resistance variable of an electrical parameter;
the high-strength torque detection elastic shaft with two sides pressed and fixed with the inner power ring permanent magnet is coaxially arranged between the sensor shell sleeve piece with the seat pressed and fixed with the outer ring permanent magnet and the magnetic field on the end cover pressed and fixed with the outer ring permanent magnet shell sleeve, so that the high-speed rotation without mechanical friction and magnetic capture limit of the high-strength torque detection elastic shaft of the torque sensor is realized,
the constant-stability direct current power supply of the parallel hollow radiation energy source is aligned through the power interface circuit, so that the conversion of the energy action form between input energy and output is realized;
the energy radiation of the glue dripping component of the hollow monocrystalline silicon battery piece is realized through a quasi-parallel hollow radiation energy source, so that the effective generation of the direct-current charge carrying energy of the glue dripping component of the hollow monocrystalline silicon battery piece is realized;
the technical characteristics that the torque detection circuit runs stably and is not interfered by any external electromagnetic interference are thoroughly realized by using direct-current load electric energy generated by the hollow monocrystalline silicon battery piece glue dripping assembly aiming at the torque detection circuit on the high-strength torque detection elastic shaft;
the high-frequency light emitter is driven by the multi-point continuous group emitter on the hollow torque detection PCB, so that the quantitative transmission of high-strength torque detection elastic torque signals is realized;
the PCB circuit for processing the hollow torque realizes the distortion-free receiving of multi-point continuous mass-sending signals by adopting the capture of the arrangement of light receiving devices and the editing and processing technology of logic gate integrated block devices;
the external transmission of the torque measuring signals of the magnetic capture non-inductive torque sensor is realized through the operation of the hollow torque processing circuit board and the signal interface circuit board.
2. The torque sensor according to claim 1, wherein the outer ring permanent magnet of the hollow solid curved surface and the inner ring permanent magnet of the hollow solid curved surface in the relationship of "magnetic capture" can be used independently of the torque sensor.
3. The magnetic capture, non-inductive torque transducer of claim 1, wherein the quasi-parallel hollow radiant energy sources are of two types: the sensor comprises a hollow single full ring type and a hollow double full ring type, wherein the hollow double full ring type is used for a torque sensor of small beef rice, and the hollow single full ring type is used for a torque sensor of large beef rice.
4. The torque transducer of claim 1, wherein the hollow single crystal silicon cell patch drop assembly is of two types: the sensor comprises a hollow single full ring type and a hollow double full ring type, wherein the hollow double full ring type is used for a torque sensor of small beef rice, and the hollow single full ring type is used for a torque sensor of large beef rice.
5. The torque transducer of claim 1, wherein the hollow single crystal silicon cell patch is configured with a disk spot on the back side of the drop assembly.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611182168.4A CN108204873B (en) | 2016-12-20 | 2016-12-20 | Magnetic capture non-inductive torque sensor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611182168.4A CN108204873B (en) | 2016-12-20 | 2016-12-20 | Magnetic capture non-inductive torque sensor |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN108204873A CN108204873A (en) | 2018-06-26 |
| CN108204873B true CN108204873B (en) | 2020-05-22 |
Family
ID=62603084
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201611182168.4A Active CN108204873B (en) | 2016-12-20 | 2016-12-20 | Magnetic capture non-inductive torque sensor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108204873B (en) |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3938890A (en) * | 1974-10-15 | 1976-02-17 | Flavell Evan R | Torque transducer utilizing differential optical sensing |
| CN2803300Y (en) * | 2005-02-07 | 2006-08-09 | 杨健成 | Dental handset magnetic suspension driving gear |
| CN101986118A (en) * | 2010-06-12 | 2011-03-16 | 陈会良 | Opto-coupling torque transducer |
| CN102712341A (en) * | 2009-11-20 | 2012-10-03 | Lg伊诺特有限公司 | Apparatus for detecting steering torque and steering angle and steering system having the same |
| CN103250038A (en) * | 2010-11-08 | 2013-08-14 | 罗伯特·博世有限公司 | Sensor arrangement for capturing a torque |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2120215U (en) * | 1992-03-26 | 1992-10-28 | 权世华 | Magnetic force suspension bearing |
| GB2417616B (en) * | 2003-09-22 | 2008-01-02 | Delta Electronics Inc | A motor without bearing |
| CN102537046A (en) * | 2011-12-30 | 2012-07-04 | 张冰青 | Magnetic levitation bearings and magnetic levitation motor |
-
2016
- 2016-12-20 CN CN201611182168.4A patent/CN108204873B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3938890A (en) * | 1974-10-15 | 1976-02-17 | Flavell Evan R | Torque transducer utilizing differential optical sensing |
| CN2803300Y (en) * | 2005-02-07 | 2006-08-09 | 杨健成 | Dental handset magnetic suspension driving gear |
| CN102712341A (en) * | 2009-11-20 | 2012-10-03 | Lg伊诺特有限公司 | Apparatus for detecting steering torque and steering angle and steering system having the same |
| CN101986118A (en) * | 2010-06-12 | 2011-03-16 | 陈会良 | Opto-coupling torque transducer |
| CN103250038A (en) * | 2010-11-08 | 2013-08-14 | 罗伯特·博世有限公司 | Sensor arrangement for capturing a torque |
Also Published As
| Publication number | Publication date |
|---|---|
| CN108204873A (en) | 2018-06-26 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| WO2016034017A1 (en) | Wide-frequency-band large displacement angle shaker | |
| CN103765178A (en) | Magnetic load sensor | |
| CN204255491U (en) | A kind of transient equilibrium electrical measurement vibrating sensing apparatus | |
| CN109639088A (en) | A kind of compound source energy collector that declines of electromagnetism-piezoelectricity-magnetostriction | |
| CN108204873B (en) | Magnetic capture non-inductive torque sensor | |
| CN102946178B (en) | Self-powered device for supplying power for measuring sensor on rotary machine | |
| CN104092347B (en) | A kind of magnetostriction vibration power generation assembly | |
| RU2012141570A (en) | SENSOR DEVICE FOR BEARING CURRENT WITH ENERGY CONVERTER | |
| CN202661478U (en) | Passive speed sensor | |
| CN204228305U (en) | Magnetic Memory-Barkhausen's fusion detection stress system | |
| JP2004521313A (en) | System and method for measuring dynamic load of a magnetic bearing | |
| CN102752696B (en) | A kind of Glue-free buzzer and production technology thereof | |
| CN202281672U (en) | Compensating circuit for normalizing temperature sensitive coefficients of diffuse silicon pressure sensor through temperature sensitive resistor | |
| CN209820659U (en) | Composite torque sensor of electric booster vehicle | |
| Xu et al. | Energy-autonomous on-rotor RPM sensor using variable reluctance energy harvesting | |
| CN211553150U (en) | Non-contact torque sensor | |
| CN210514437U (en) | Magnetoelectric laminated material current sensing device based on magnetic convergence effect | |
| CN204988496U (en) | Two cantilever vibration sensor | |
| CN203630327U (en) | Direct current magnetic field compensation device used for electrical steel continuous iron loss measurement | |
| CN109495019B (en) | Vibration energy collecting device and method for machine tool spindle | |
| CN204314014U (en) | A kind of high speed rotor on-line dynamic balancing header structure | |
| Siva et al. | Piezoelectric based electric energy generation from sound energy | |
| CN209233746U (en) | A kind of adaptive active damper of frequency for accurate experimental bench | |
| CN102230509B (en) | Non-contact type active damping device | |
| CN206839377U (en) | A kind of wire feeder |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |