CN210981298U - Magnetic focusing split type integrated sensor - Google Patents
Magnetic focusing split type integrated sensor Download PDFInfo
- Publication number
- CN210981298U CN210981298U CN201922267829.9U CN201922267829U CN210981298U CN 210981298 U CN210981298 U CN 210981298U CN 201922267829 U CN201922267829 U CN 201922267829U CN 210981298 U CN210981298 U CN 210981298U
- Authority
- CN
- China
- Prior art keywords
- shaft
- receiving coil
- coil
- magnetic focusing
- circuit board
- 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
Abstract
The utility model provides a split type integrated sensor of magnetic focusing belongs to sensor technical field, especially relates to a split type integrated sensor of magnetic focusing. The problems that the existing sensor for measuring the rotating speed, the torque and the angle of the shaft has high requirement on the size of the shaft, is poor in matching performance and is difficult to find a zero point are solved. The sensor includes waiting to survey the axle and gathers the mechanism, it is axle input and axle output end respectively to wait to survey the axle both ends, it sets up respectively at axle input and axle output end department to gather the mechanism, it includes rotor circuit board, receiving coil, casing and exciting coil to gather the mechanism, rotor circuit board and receiving coil are printed on receiving coil flexible circuit board, and the printing has signal processing circuit on the receiving coil, and it mainly used is to measure and calculate the rotational speed, the moment of torsion and the angle of counter shaft.
Description
Technical Field
The utility model belongs to the technical field of the sensor, especially, relate to a split type integrated sensor of magnetic focusing.
Background
The sensor is a detection device which can sense the measured information and convert the sensed information into electric signals or other information in required forms according to a certain rule to be output so as to meet the requirements of information transmission, processing, storage, display, recording, control and the like.
The existing sensor for measuring the rotating speed, the torque and the angle of the shaft is mostly of an integrated structure, the size requirement of the structure on the shaft is high, when the size of the shaft is changed, the mold needs to be opened again for the shell of the sensor, the cost is high, the matching performance is poor, the existing sensor is complex in a recording mode of zero point of the measuring shaft, the zero point position is not easy to find, and the difficulty is brought to subsequent calculation.
SUMMERY OF THE UTILITY MODEL
The utility model discloses a solve the problem among the prior art, provide a split type integrated sensor of magnetism focusing.
In order to achieve the above purpose, the utility model adopts the following technical scheme: a magnetic focusing split type integrated sensor comprises a shaft to be measured and an acquisition mechanism, wherein the shaft input end and the shaft output end are respectively arranged at two ends of the shaft to be measured, the acquisition mechanism is respectively arranged at the shaft input end and the shaft output end, the acquisition mechanism comprises a rotor circuit board, a receiving coil, a shell and an exciting coil, the rotor circuit board and the receiving coil are printed on a receiving coil flexible circuit board, a signal processing circuit is printed on the receiving coil, the rotor circuit board and the receiving coil are adhered to the shaft input end and the shaft output end and rotate together with the shaft to be measured, the receiving coil is in a structure that a plurality of rectangles are connected in a tail mode, one of the rectangles is a zero-point rectangle, the area of the zero-point rectangle is larger than that of the rest rectangles, and the areas of the rest rectangles except the zero-point rectangle are the same; the excitation coil is arranged above the shaft input end and the shaft output end, the excitation coil is a rectangular coil bent into an arc shape, the excitation coil is printed on an excitation coil flexible circuit board, each layer of the excitation coil flexible circuit board is printed with one excitation coil, a plurality of layers of the excitation coil flexible circuit boards are overlapped layer by layer to form inverted pyramid arrangement, the excitation coil flexible circuit boards are fixed inside the shell, the shell is provided with an adjusting screw and a handle, the adjusting screw penetrates through the excitation coil, and a stator processing circuit is arranged in the handle.
Furthermore, the stator processing circuit comprises an oscillating circuit and a wireless power supply transmitting circuit.
Furthermore, a sinusoidal voltage of 8-12MHz is applied to the exciting coil.
Furthermore, the signal processing circuit comprises a signal acquisition module, a signal processing module, a wireless power supply module and a wireless transmission module.
Furthermore, the handle is provided with an opening for leading out a lead.
Furthermore, a base is arranged on the shell and is installed on the carrier.
The utility model also provides an use split type integrated sensor's of magnetic focusing rotational speed calculation method, it includes following step:
the method comprises the following steps: applying alternating current to the exciting coil, generating an alternating magnetic field in space, enabling an adjusting screw to serve as a magnetic guide piece according to the spatial distribution of the exciting coil, rotating the adjusting screw to penetrate through the exciting coil, changing the distance from the adjusting screw to a shaft to be measured, and changing the focusing area to enable the magnetic field to be focused on one point on the shaft to be measured, wherein the point is a magnetic focusing point which is located in the rectangular receiving coil;
step two: the track of the magnetic focusing point is a circle along with the rotation of the shaft to be measured, and when the magnetic focusing point is in the rectangular inner part of the receiving coil, induced voltage is generated on the receiving coil due to the change of magnetic flux in the receiving coil;
step three: when the magnetic focusing point is positioned between the two rectangles, the magnetic flux of the receiving coil is changed into 0, the induction voltage of the receiving coil is zero, the area of a zero-point rectangle in the receiving coil is larger than that of the rest rectangles, the high-level maintaining time is longer than that of the rest rectangles, and the zero-point rectangle is set as a sensor zero point;
step four: the receiving coil is a structure with a plurality of rectangular ends connected, and according to a formula:
in the formula: b is magnetic induction intensity, S is the area of a rectangle, U is induced voltage of a receiving coil, t is time, phi is magnetic flux, and the formula shows that under the condition of certain magnetic induction intensity, the voltage and the voltage are in direct proportion to the area of the rectangle in a certain time, and the change of the area of the rectangle causes the change of the induced voltage of the receiving coil;
step five: counting when the acquired induction voltage of the receiving coil is high; and calculating the rotating speed by recording the number of high levels in a certain time.
The utility model also provides an use split type integrated sensor's of magnetic focusing moment of torsion calculation method, it includes following step:
the method comprises the following steps: applying alternating current to the exciting coil, generating an alternating magnetic field in space, enabling an adjusting screw to serve as a magnetic guide piece according to the spatial distribution of the exciting coil, rotating the adjusting screw to penetrate through the exciting coil, changing the distance from the adjusting screw to a shaft to be measured, and changing the focusing area to enable the magnetic field to be focused on one point on the shaft to be measured, wherein the point is a magnetic focusing point which is located in the rectangular receiving coil;
step two: the track of the magnetic focusing point is a circle along with the rotation of the shaft to be measured, and when the magnetic focusing point is in the rectangular inner part of the receiving coil, induced voltage is generated on the receiving coil due to the change of magnetic flux in the receiving coil;
step three: when the magnetic focusing point is positioned between the two rectangles, the magnetic flux of the receiving coil is changed into 0, the induction voltage of the receiving coil is zero, the area of a zero-point rectangle in the receiving coil is larger than that of the rest rectangles, the high-level maintaining time is longer than that of the rest rectangles, and the zero-point rectangle is set as a sensor zero point;
step four: the rotation of the shaft to be measured produces a deformation angle. The shaft input end and the shaft output end are respectively provided with a receiving coil, and the parameters of the receiving coils at the shaft input end and the shaft output end are consistent;
step five: when the shaft to be measured is static, the signals collected by the shaft input end and the shaft output end are overlapped, when the shaft to be measured rotates, the signals of the shaft input end and the shaft output end generate phase difference, and the deformation angle theta of the shaft to be measured is obtained by calculating the signal delay of the shaft output end.
Step six: the torque is calculated according to the following formula,
in the formula, theta is the torsion angle of the shaft, T is the load torque, L is the effective length of the torsion bar, G is the shear modulus of the torsion bar material, IpIs the polar moment of inertia of the cross section of the torsion bar.
The utility model also provides an use split type integrated sensor's of magnetic focusing angle calculation method, it includes following step:
the method comprises the following steps: applying alternating current to the exciting coil, generating an alternating magnetic field in space, enabling an adjusting screw to serve as a magnetic guide piece according to the spatial distribution of the exciting coil, rotating the adjusting screw to penetrate through the exciting coil, changing the distance from the adjusting screw to a shaft to be measured, and changing the focusing area to enable the magnetic field to be focused on one point on the shaft to be measured, wherein the point is a magnetic focusing point which is located in the rectangular receiving coil;
step two: the track of the magnetic focusing point is a circle along with the rotation of the shaft to be measured, and when the magnetic focusing point is in the rectangular inner part of the receiving coil, induced voltage is generated on the receiving coil due to the change of magnetic flux in the receiving coil;
step three: when the magnetic focusing point is positioned between the two rectangles, the magnetic flux of the receiving coil is changed into 0, the induction voltage of the receiving coil is zero, the area of a zero-point rectangle in the receiving coil is larger than that of the rest rectangles, the high-level maintaining time is longer than that of the rest rectangles, and the zero-point rectangle is set as a sensor zero point;
step four: when the receiving coil collects the pulse signals, the magnetic focusing point can be determined to be positioned on the second rectangle of the receiving coil by calculating the time length of the collected pulses, and the rotation angle of the shaft to be measured is calculated according to the angle occupied by the rectangle space.
Compared with the prior art, the beneficial effects of the utility model are that: the utility model provides a problem of the sensor counter shaft's of the rotational speed of current measuring spindle, moment of torsion and angle dimensional requirement height, matching nature are poor and find zero difficulty. The utility model discloses sensor housing structure is fixed, pastes receiving coil on waiting to measure epaxially, and when the size of axis changed, need not to carry out the die sinking again to the casing part, only change the receiving coil size can, reduce the processing cost, improve the matching nature of sensor. The size of the magnetic focusing area is adjusted through the screw, the magnetic field is focused on one point on the surface of the shaft to be measured according to the superposition principle of the magnetic field, the focusing area is adjusted through the adjusting screw, the focusing area reaches one point, the performance of the sensor is adjusted, and the most appropriate sensitivity of the carrier is found. One rectangle in the receiving coil is larger than the rest rectangles, the level maintaining time of the received signal is changed, quick change is achieved, the change point mode is simple, and the change point is easy to distinguish.
Drawings
FIG. 1 is an exploded view of a magnetic focusing split type integrated sensor
FIG. 2 is a schematic diagram of a receiving coil structure of the present invention
FIG. 3 is a schematic view of the housing structure of the present invention
FIG. 4 is a schematic view of the structure of the collecting mechanism of the present invention
FIG. 5 is a schematic diagram of the structure of the exciting coil of the present invention
FIG. 6 is the overall structure schematic diagram of a magnetic focusing split type integrated sensor
FIG. 7 is a schematic diagram of the pulse signal of the rotation speed and angle of the present invention
FIG. 8 is a schematic diagram of a torque pulse signal according to the present invention
1-a shaft to be measured, 2-a shaft input end, 3-a shaft output end, 4-a rotor circuit board, 5-a receiving coil, 6-a shell, 7-an exciting coil, 8-a zero point rectangle, 9-an adjusting screw, 10-a handle, 11-a stator processing circuit fixing surface and 12-an exciting coil fixing surface.
Detailed Description
The technical solution in the embodiment of the present invention will be clearly and completely explained below with reference to the drawings in the embodiment of the present invention.
Referring to fig. 1-8 to illustrate the embodiment, a magnetic focusing split type integrated sensor comprises a shaft to be measured 1 and an acquisition mechanism, wherein two ends of the shaft to be measured 1 are respectively a shaft input end 2 and a shaft output end 3, the acquisition mechanism is respectively arranged at the shaft input end 2 and the shaft output end 3, the acquisition mechanism comprises a rotor circuit board 4, a receiving coil 5, a shell 6 and an exciting coil 7, the rotor circuit board 4 and the receiving coil 5 are printed on a receiving coil flexible circuit board, a signal processing circuit is printed on the receiving coil 5, the rotor circuit board 4 and the receiving coil 5 are adhered on the shaft input end 2 and the shaft output end 3 and rotate together with the shaft to be measured 1, the receiving coil 5 is in a structure that a plurality of rectangles are connected in a tail end manner, one of the rectangles is a zero rectangle 8, and the area of the zero rectangle 8 is larger than the other rectangles, the areas of the other rectangles except the zero rectangle 8 are the same; the excitation coil 7 is arranged above the shaft input end 2 and the shaft output end 3, the excitation coil 7 is a rectangular coil bent into an arc shape, the excitation coil 7 is printed on an excitation coil flexible circuit board, one excitation coil 7 is printed on each layer of the excitation coil flexible circuit board, a plurality of layers of the excitation coil flexible circuit boards are stacked layer upon layer to form inverted pyramid arrangement, the excitation coil flexible circuit boards are fixed inside the shell 6, an adjusting screw 9 and a handle 10 are arranged on the shell 6, the adjusting screw 9 penetrates through the excitation coil 7, and a stator processing circuit is arranged in the handle 10.
In the present embodiment, a plurality of excitation coils 7 are arranged above the axis 1 to be measured, a high-frequency sinusoidal voltage of 8-12MHz is applied to each excitation coil 7, and the current amplitude of each excitation coil 7 is determined according to the position of the excitation coil. According to the principle of superposition of the magnetic field, the magnetic field is focused on one point on the surface of the shaft 1 to be measured through adjustment of the adjusting screw 9. During installation, the shell 6 is fixed firstly, then the flexible circuit board containing the exciting coil 7 is fixed inside the shell 6, the stator processing circuit is located inside the handle 10, the handle 10 is provided with a hole for leading out a lead, the flexible circuit board and the stator processing circuit are fixed by screwing a screw of a stator fixing screw hole, and the shell 6, the exciting coil 7 and the stator processing circuit jointly form a stator of the sensor. The receiving coil 5 and the rotor processing circuit 4 are directly adhered to the surface of the shaft 1 to be measured, so that a split structure of the receiving coil 5 and the shell 6 is realized. The shell 6 is provided with a base which is arranged on the carrier. The stator processing circuit comprises an oscillating circuit and a wireless power supply transmitting circuit. The signal processing circuit comprises a signal acquisition module, a signal processing module, a wireless power supply module and a wireless transmission module.
The utility model also provides an use split type integrated sensor's of magnetic focusing rotational speed calculation method, it includes following step:
the method comprises the following steps: applying alternating current to the exciting coil 7, generating an alternating magnetic field in a space, according to the spatial distribution of the exciting coil 7, using the adjusting screw 9 as a magnetic guide, penetrating through the exciting coil 7 by rotating the adjusting screw 9, changing the distance from the adjusting screw 9 to the shaft 1 to be measured, and changing the focusing area, so that the magnetic field is focused on one point on the shaft 1 to be measured, wherein the point is a magnetic focusing point, and the magnetic focusing point is positioned in the rectangular inner part of the receiving coil 5;
step two: with the rotation of the shaft 1 to be measured, the track of the magnetic focusing point is a circle, and when the magnetic focusing point is in the rectangular interior of the receiving coil 5, induced voltage is generated on the receiving coil 5 due to the change of magnetic flux in the receiving coil 5;
step three: when the magnetic focusing point is positioned between the two rectangles, the magnetic flux of the receiving coil 5 is changed into 0, the induction voltage of the receiving coil is zero, the area of a zero-point rectangle 8 in the receiving coil 5 is larger than that of the rest rectangles, the high-level maintaining time is longer than that of the rest rectangles, and the zero-point rectangle 8 is set as a sensor zero point;
step four: the receiving coil 5 is a structure with a plurality of rectangular ends connected, and according to a formula:
in the formula: b is magnetic induction intensity, S is the area of a rectangle, U is induced voltage of a receiving coil, t is time, phi is magnetic flux, and the formula shows that under the condition of certain magnetic induction intensity, the voltage and the voltage are in direct proportion to the area of the rectangle in a certain time, and the change of the area of the rectangle causes the change of the induced voltage of the receiving coil;
step five: counting when the acquired induction voltage of the receiving coil 5 is high; and calculating the rotating speed by recording the number of high levels in a certain time.
The utility model also provides an use split type integrated sensor's of magnetic focusing moment of torsion calculation method, it includes following step:
the method comprises the following steps: applying alternating current to the exciting coil 7, generating an alternating magnetic field in a space, according to the spatial distribution of the exciting coil 7, using the adjusting screw 9 as a magnetic guide, penetrating through the exciting coil 7 by rotating the adjusting screw 9, changing the distance from the adjusting screw 9 to the shaft 1 to be measured, and changing the focusing area, so that the magnetic field is focused on one point on the shaft 1 to be measured, wherein the point is a magnetic focusing point, and the magnetic focusing point is positioned in the rectangular inner part of the receiving coil 5;
step two: with the rotation of the shaft 1 to be measured, the track of the magnetic focusing point is a circle, and when the magnetic focusing point is in the rectangular interior of the receiving coil 5, induced voltage is generated on the receiving coil 5 due to the change of magnetic flux in the receiving coil 5;
step three: when the magnetic focusing point is positioned between the two rectangles, the magnetic flux of the receiving coil 5 is changed into 0, the induction voltage of the receiving coil is zero, the area of a zero-point rectangle 8 in the receiving coil 5 is larger than that of the rest rectangles, the high-level maintaining time is longer than that of the rest rectangles, and the zero-point rectangle 8 is set as a sensor zero point;
step four: the rotation of the shaft 1 to be measured produces a deformation angle. The shaft input end 2 and the shaft output end 3 are respectively provided with a receiving coil 5, and the parameters of the receiving coils 5 of the shaft input end 2 and the shaft output end 3 are consistent;
step five: when the shaft 1 to be measured is static, the signals collected by the shaft input end 2 and the shaft output end 3 are overlapped, when the shaft 1 to be measured rotates, the signals of the shaft input end 2 and the shaft output end 3 generate a phase difference, and the deformation angle theta of the shaft 1 to be measured is obtained by calculating the signal delay of the shaft output end 3.
Step six: the torque is calculated according to the following formula,
in the formula, theta is the torsion angle of the shaft, T is the load torque, L is the effective length of the torsion bar, G is the shear modulus of the torsion bar material, IpIs the polar moment of inertia of the cross section of the torsion bar.
The utility model also provides an use split type integrated sensor's of magnetic focusing angle calculation method, it includes following step:
the method comprises the following steps: applying alternating current to the exciting coil 7, generating an alternating magnetic field in a space, according to the spatial distribution of the exciting coil 7, using the adjusting screw 9 as a magnetic guide, penetrating through the exciting coil 7 by rotating the adjusting screw 9, changing the distance from the adjusting screw 9 to the shaft 1 to be measured, and changing the focusing area, so that the magnetic field is focused on one point on the shaft 1 to be measured, wherein the point is a magnetic focusing point, and the magnetic focusing point is positioned in the rectangular inner part of the receiving coil 5;
step two: with the rotation of the shaft 1 to be measured, the track of the magnetic focusing point is a circle, and when the magnetic focusing point is in the rectangular interior of the receiving coil 5, induced voltage is generated on the receiving coil 5 due to the change of magnetic flux in the receiving coil 5;
step three: when the magnetic focusing point is positioned between the two rectangles, the magnetic flux of the receiving coil 5 is changed into 0, the induction voltage of the receiving coil is zero, the area of a zero-point rectangle 8 in the receiving coil 5 is larger than that of the rest rectangles, the high-level maintaining time is longer than that of the rest rectangles, and the zero-point rectangle 8 is set as a sensor zero point;
step four: when the receiving coil 5 collects the pulse signal, the magnetic focusing point can be determined to be positioned on the second rectangle of the receiving coil 5 by calculating the time length of the collected pulse, and the rotation angle of the shaft 1 to be measured is calculated according to the angle occupied by the rectangular space.
The magnetic focusing split type integrated sensor provided by the utility model is introduced in detail, and the principle and the implementation mode of the utility model are explained by applying specific examples, and the explanation of the above embodiments is only used for helping to understand the method and the core idea of the utility model; meanwhile, for the general technical personnel in the field, according to the idea of the present invention, there are changes in the specific implementation and application scope, to sum up, the content of the present specification should not be understood as the limitation of the present invention.
Claims (6)
1. The utility model provides a split type integrated sensor of magnetic focusing which characterized in that: the device comprises a shaft to be measured (1) and a collecting mechanism, wherein the two ends of the shaft to be measured (1) are respectively provided with a shaft input end (2) and a shaft output end (3), the collecting mechanism is respectively arranged at the shaft input end (2) and the shaft output end (3), the collecting mechanism comprises a rotor circuit board (4), a receiving coil (5), a shell (6) and an exciting coil (7), the rotor circuit board (4) and the receiving coil (5) are printed on a receiving coil flexible circuit board, a signal processing circuit is printed on the receiving coil (5), the rotor circuit board (4) and the receiving coil (5) are adhered on the shaft input end (2) and the shaft output end (3) and rotate together with the shaft to be measured (1), the receiving coil (5) is of a structure with a plurality of rectangular tail ends connected, one of the plurality of zero points is a rectangle (8), the area of the zero point (8) is larger than the rest of rectangles, the areas of the other rectangles except the zero rectangle (8) are the same; the excitation coil (7) is arranged above the shaft input end (2) and the shaft output end (3), the excitation coil (7) is a rectangular coil bent into a circular arc shape, the excitation coil (7) is printed on an excitation coil flexible circuit board, each layer of the excitation coil flexible circuit board is printed with one excitation coil (7), a plurality of layers of the excitation coil flexible circuit boards are stacked layer upon layer to form inverted pyramid arrangement, the excitation coil flexible circuit boards are fixed inside the shell (6), an adjusting screw (9) and a handle (10) are arranged on the shell (6), the adjusting screw (9) penetrates through the excitation coil (7), and a stator processing circuit is arranged in the handle (10).
2. The split integrated magnetic focusing sensor according to claim 1, wherein: the stator processing circuit comprises an oscillating circuit and a wireless power supply transmitting circuit.
3. The split integrated magnetic focusing sensor according to claim 1, wherein: a sinusoidal voltage of 8-12MHz is applied to the exciting coil (7).
4. The split integrated magnetic focusing sensor according to claim 1, wherein: the signal processing circuit comprises a signal acquisition module, a signal processing module, a wireless power supply module and a wireless transmission module.
5. The split integrated magnetic focusing sensor according to claim 1, wherein: the handle (10) is provided with an opening for leading out a lead.
6. The split integrated magnetic focusing sensor according to claim 1, wherein: the shell (6) is provided with a base, and the base is installed on the carrier.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922267829.9U CN210981298U (en) | 2019-12-17 | 2019-12-17 | Magnetic focusing split type integrated sensor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922267829.9U CN210981298U (en) | 2019-12-17 | 2019-12-17 | Magnetic focusing split type integrated sensor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN210981298U true CN210981298U (en) | 2020-07-10 |
Family
ID=71422791
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201922267829.9U Active CN210981298U (en) | 2019-12-17 | 2019-12-17 | Magnetic focusing split type integrated sensor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN210981298U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110849399A (en) * | 2019-12-17 | 2020-02-28 | 东北林业大学 | Magnetic focusing split type integrated sensor and rotating speed, torque and angle calculation method |
| CN115452221A (en) * | 2022-08-18 | 2022-12-09 | 东北林业大学 | Single-C-shaped/double-C-shaped focusing magnetic field excitation device applied to shafting torque measurement |
-
2019
- 2019-12-17 CN CN201922267829.9U patent/CN210981298U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110849399A (en) * | 2019-12-17 | 2020-02-28 | 东北林业大学 | Magnetic focusing split type integrated sensor and rotating speed, torque and angle calculation method |
| CN115452221A (en) * | 2022-08-18 | 2022-12-09 | 东北林业大学 | Single-C-shaped/double-C-shaped focusing magnetic field excitation device applied to shafting torque measurement |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN210981298U (en) | Magnetic focusing split type integrated sensor | |
| CN102959362A (en) | Angle detection device | |
| CN104864804B (en) | Time grating angular displacement sensor | |
| CN101299048B (en) | Rotating angular acceleration sensor | |
| JP2988597B2 (en) | Rotational position detector | |
| CN110849399A (en) | Magnetic focusing split type integrated sensor and rotating speed, torque and angle calculation method | |
| CN109443462A (en) | A kind of antimagnetic measuring and testing device | |
| CN104198098A (en) | Torque measurement sensor based on phase difference of photoelectric encoder signals and measuring method | |
| CN101359893A (en) | Method for measuring rotor angle location of permanent magnet synchronous electric motor, location sensor thereof | |
| CN102782458B (en) | There is the shaft current sensor device of energy converter | |
| CN107202966A (en) | The measuring method and system of a kind of alternate stray field of Transformer Winding | |
| CN108917796B (en) | Inductive rotary transformer | |
| CN2821531Y (en) | Self electricing generation water meter | |
| CN110967134A (en) | Magnetic precise constraint type magnetic focusing torque sensor and torque calculation method | |
| CN211147914U (en) | Magnetic accurate constraint type magnetic focusing torque sensor | |
| CN209945434U (en) | Induction type non-magnetic remote water meter | |
| CN212363512U (en) | Magnetic focusing type sensor with variable number of turns | |
| Bartlett et al. | Spinning magnets and Jehle's model of the electron | |
| JPS5937695Y2 (en) | pulse generator | |
| CN201237607Y (en) | Electromagnetic rotating angular acceleration sensor | |
| CN114112138A (en) | Magnetic focusing type sensor with variable turns and rotating speed and torque calculation method | |
| CN206891447U (en) | A kind of dynamically tuned gyro, DTG and its angular position pick up | |
| CN112484633A (en) | Device and method for measuring quadrature error of torquer coil | |
| CN215339922U (en) | Rotating speed sensor based on magnetic focusing parallel type angle | |
| CN202119787U (en) | Automatic motor rotation speed detecting device |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |