CN214702114U - Small-size differential transformer type displacement sensor - Google Patents
Small-size differential transformer type displacement sensor Download PDFInfo
- Publication number
- CN214702114U CN214702114U CN202121313908.XU CN202121313908U CN214702114U CN 214702114 U CN214702114 U CN 214702114U CN 202121313908 U CN202121313908 U CN 202121313908U CN 214702114 U CN214702114 U CN 214702114U
- Authority
- CN
- China
- Prior art keywords
- coil
- secondary coil
- displacement sensor
- differential transformer
- shell
- 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 discloses a little volume differential transformer formula displacement sensor, which comprises an outer shell, the skeleton subassembly of setting in the shell, and the iron core subassembly, the shell inner wall is provided with the shielding layer, the skeleton subassembly includes skeleton and coiling primary coil on the skeleton, secondary coil one, secondary coil two, compensating coil one and compensating coil two, secondary coil one and two opposite direction of coiling of secondary coil, the end of secondary coil one meets with compensating coil one's top, secondary coil two's end meets with compensating coil two's top, the head end of secondary coil one and secondary coil two's head end short circuit. The utility model has the advantages of simple structure and reasonable design, increased compensating coil, the winding mode is changed into triangular distribution structure by rectangle distribution structure, and this compensating mode has the characteristics of wide range ratio high accuracy, can judge whether the product breaks down through monitoring and value voltage VA + VB simultaneously, has improved work efficiency greatly.
Description
Technical Field
The utility model belongs to the technical field of electronic sensor, concretely relates to little volume differential transformer formula displacement sensor.
Background
In the field of aviation and aerospace, particularly in a fly-by-wire control system, a servo steering engine is becoming more and more important as one of the important parts, and especially a steering engine which is miniaturized, light in weight and high in reliability is favored by unmanned aerial vehicles and other aircrafts. The differential transformer type displacement sensor is used as one component of the servo steering engine, has the characteristics of long service life, high precision, good mechanical strength, low thermal drift and the like, and is applied to displacement measurement of the steering engine of the type.
The differential transformer type displacement sensor is composed of a primary winding, two secondary windings, an iron core, a coil skeleton, a shell and the like. The primary winding and the secondary winding are distributed on the framework, and a rod-shaped iron core capable of freely moving is arranged in the winding. When the iron core is in the middle position, the induced electromotive forces generated by the two secondary windings are equal, so that the output voltage is zero; when the iron core moves in the winding and deviates from the central position, the induced electromotive forces generated by the two windings are unequal, voltage is output, and the voltage magnitude depends on the magnitude of the displacement. In order to improve the sensitivity of the sensor, improve the linearity of the sensor and increase the linear range of the sensor, the two coils are connected in an anti-series mode during design, the voltage polarities of the two secondary coils are opposite, the voltage output by the LVDT is the difference of the voltages of the two secondary windings, and the output voltage value is in a linear relation with the displacement of the iron core.
The sensor in the domestic market has larger structure size and lower reliability. Cannot meet the requirements. Due to the demand for miniaturization, displacement sensors with compact structure, high precision and large stroke are increasingly favored, and the design and manufacture of the shell, the framework and the coil are critical to obtain a larger linear measurement range within a certain structural size.
SUMMERY OF THE UTILITY MODEL
The utility model aims to solve the technical problem that not enough among the above-mentioned prior art is directed against, provide a little volume differential transformer formula displacement sensor, its simple structure, reasonable in design have increased compensating coil, and the wire winding mode is changed into triangular distribution structure by rectangle distribution structure, and this compensation mode has the characteristics of wide range ratio high accuracy, can judge whether the product breaks down through monitoring and value voltage VA + VB simultaneously, has improved work efficiency greatly.
In order to solve the technical problem, the utility model discloses a technical scheme is: a small volume differential transformer displacement sensor, characterized by: including shell, the skeleton subassembly of setting in the shell to and iron core subassembly, the shell inner wall is provided with the shielding layer, the skeleton subassembly includes skeleton and the coil of coiling on the skeleton, the coil includes primary coil, secondary coil one, secondary coil two, compensation coil one and compensation coil two, secondary coil one and two opposite coiling directions of secondary coil, the end of secondary coil one meets with the initial end of compensation coil one, the end of secondary coil two meets with the initial end of compensation coil two, the head end of secondary coil one and the head end short circuit of secondary coil two, iron core subassembly is located in the inner chamber of skeleton, the both ends of skeleton are provided with the magnetizer, shielding layer, magnetizer and iron core subassembly constitute the magnetic field passageway of sensor.
The small-volume differential transformer type displacement sensor is characterized in that: the shell is cavity cylindricality cavity, the shell inner wall is provided with the shielding layer, the one end of shell is provided with mounting flange, skeleton and mounting flange fixed connection, the other end of shell is provided with the confession the wire that the coil was drawn forth draws forth the mouth, wire draws forth a mouthful position department and is provided with the sealing rubber ring.
The small-volume differential transformer type displacement sensor is characterized in that: the iron core component comprises a connecting rod, an iron core and an iron core plug which are fixedly connected in sequence.
The small-volume differential transformer type displacement sensor is characterized in that: the wire, the wire diameter and the number of turns of the first secondary coil are the same as those of the first compensation coil; and the wire rods, the wire diameters and the turns of the secondary coil II and the compensation coil II are the same.
The small-volume differential transformer type displacement sensor is characterized in that: the primary coil adopts an enameled wire with the diameter of 0.12mm, and the secondary coil I and the secondary coil II both adopt enameled wires with the diameter of 0.07 mm.
The small-volume differential transformer type displacement sensor is characterized in that: the number of turns of the first secondary coil is the same as that of the second secondary coil.
The small-volume differential transformer type displacement sensor is characterized in that: the primary coil is wound with 2730 turns, and the primary coil I and the secondary coil II are both wound with 1038 turns.
The small-volume differential transformer type displacement sensor is characterized in that: and a vacuum dip coating layer is arranged on the outer surface of the coil.
The small-volume differential transformer type displacement sensor is characterized in that: the skeleton is made by hollow cylinder stainless steel material, the both ends of skeleton are provided with the end cover.
Compared with the prior art, the utility model has the following advantage:
1. the utility model has the advantages of simple structure and reasonable design, realize and use convenient operation.
2. The utility model discloses increased compensating coil, the head end of secondary coil one is not even with the head end of secondary coil two, as inductive signal's output, the end of compensating coil one meets with the end of compensating coil two, as the public end, the winding mode is changed into triangular distribution structure by rectangle distribution structure, and this compensating mode has the characteristics of a wide range ratio high accuracy.
3. The utility model discloses in, secondary coil one and secondary coil two coiling opposite directions, this sensor have sum output voltage VA + VB, the sum output voltage VA + VB of sensor is a invariable voltage value, if the sensor appears if reasons such as coil fracture, iron core wearing and tearing, signal interference, casing damage, sum output voltage VA + VB also can be along with changing, can judge through monitoring sum output voltage VA + VB whether break down, work efficiency has been improved greatly.
To sum up, the utility model has the advantages of simple structure and reasonable design, increased compensating coil, the distribution structure of triangle is changed into by rectangle distribution structure to the wire winding mode, and this compensating mode has the characteristics of wide range ratio high accuracy, can judge whether the product breaks down through monitoring and value voltage VA + VB simultaneously, has improved work efficiency greatly.
The technical solution of the present invention is further described in detail by the accompanying drawings and examples.
Drawings
Fig. 1 is a schematic structural diagram of the present invention.
Fig. 2 is a schematic structural view of the iron core assembly of the present invention.
Fig. 3 is a schematic structural diagram of the coil of the present invention.
Description of reference numerals:
1-a framework; 2-a housing; 3-a shielding layer;
4-a primary coil; 5-a secondary coil I; 6-moisture absorption layer;
6-1-columnar structure; 7-secondary coil two; 8, compensating the first coil;
9-compensation coil two; 10-connecting rod; 11-iron core;
12-core plug.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings and embodiments of the present invention.
It should be noted that the embodiments and features of the embodiments in the present application may be combined with each other without conflict. The present invention will be described in detail below with reference to the embodiments with reference to the attached drawings.
It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of example embodiments according to the present application. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, and it should be understood that when the terms "comprises" and/or "comprising" are used in this specification, they specify the presence of stated features, steps, operations, devices, components, and/or combinations thereof, unless the context clearly indicates otherwise.
It should be noted that the terms "first," "second," and the like in the description and claims of this application and in the drawings described above are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used is interchangeable under appropriate circumstances such that the embodiments of the application described herein are, for example, capable of operation in sequences other than those illustrated or otherwise described herein. Furthermore, the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed, but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.
Spatially relative terms, such as "above … …," "above … …," "above … …," "above," and the like, may be used herein for ease of description to describe one device or feature's spatial relationship to another device or feature as illustrated in the figures. It will be understood that the spatially relative terms are intended to encompass different orientations of the device in use or operation in addition to the orientation depicted in the figures. For example, if a device in the figures is turned over, devices described as "above" or "on" other devices or configurations would then be oriented "below" or "under" the other devices or configurations. Thus, the exemplary term "above … …" can include both an orientation of "above … …" and "below … …". The device may be otherwise variously oriented (rotated 90 degrees or at other orientations) and the spatially relative descriptors used herein interpreted accordingly.
As shown in fig. 1 to 3, the present invention comprises a housing 2, a skeleton assembly disposed inside the housing 2, the inner wall of the shell 2 is provided with a shielding layer 3, the framework component comprises a framework 1 and a coil wound on the framework 1, the coils comprise a primary coil 4, a secondary coil I5, a secondary coil II 7, a compensation coil I8 and a compensation coil II 9, the winding directions of the first secondary coil 5 and the second secondary coil 7 are opposite, the tail end of the first secondary coil 5 is connected with the initial end of the first compensation coil 8, the tail end of the secondary coil II 7 is connected with the start end of the compensation coil II 9, the head end of the secondary coil I5 is in short circuit with the head end of the secondary coil II 7, the iron core subassembly is located in the inner chamber of skeleton 1, the both ends of skeleton 1 are provided with the magnetizer, shielding layer 3, magnetizer and iron core 6 constitute the magnetic field passageway of sensor.
In practical use, the head end of the first secondary coil 5 is not connected with the head end of the second secondary coil 7 to serve as an output end of an induction signal, and the tail end of the first compensation coil 8 is connected with the tail end of the second compensation coil 9 to serve as a common end. The sensor is additionally provided with a compensation coil, the winding mode is changed from a rectangular distribution structure to a triangular distribution structure, and the compensation mode has the characteristic of large range ratio and high precision.
The winding directions of the first secondary coil 5 and the second secondary coil 7 are opposite, and the first secondary coil 5 and the second secondary coil 7 are wound by a triangular step cross winding method respectively.
The secondary coil I5 is a forward coil and generates a forward magnetic field, and the output is recorded as VA; the second secondary coil 7 is a reverse coil, generates a reverse magnetic field, and the output is recorded as VB. According to the electromagnetic induction phenomenon, the primary coil 4 is electrified, and the secondary coil one 5 and the secondary coil two 7 generate induction currents, so that the sensor has differential output voltages VA-VB and sum output voltage VA + VB. In general, the sum output voltage VA + VB of the sensor is a constant voltage value, and if the sensor has a cause such as coil breakage, core abrasion, signal interference, and housing damage, the sum output voltage VA + VB will also vary. Whether the product breaks down or not can be judged by monitoring the sum voltage VA + VB, and the working efficiency is greatly improved.
The first compensation coil 8 and the second compensation coil 9 are used for compensation adjustment, and voltage output values of the first secondary coil 5 and the second secondary coil 7 are adjusted, so that more accurate voltage output values are obtained. The first compensation coil 8 and the first secondary coil 5 are wound in the same direction, the first compensation coil 8 serves as a positive compensation coil to generate a positive compensation magnetic field, and the magnetic field generated by the first compensation coil 8 has a counteracting effect on a reverse magnetic field generated by the second secondary coil 7, so that the sensor can reliably operate, and the sensor has practical value. The second compensation coil 9 and the second secondary coil 7 are wound in the same direction, the second compensation coil 9 serves as a reverse compensation coil to generate a reverse compensation magnetic field, the magnetic field generated by the second compensation coil 9 has a counteracting effect on the forward magnetic field generated by the first secondary coil 5, and the forward magnetic field, the reverse magnetic field, the forward compensation magnetic field and the reverse compensation magnetic field are superposed to form a total magnetic field.
The radius and the number of turns of the first compensation coil 8 and the second compensation coil 9 in the sensor can be flexibly adjusted and changed according to actual application requirements, the geometric size and the weight of the first compensation coil 8 and the second compensation coil 9 are effectively reduced, and the size of the sensor is reduced.
In this embodiment, shell 2 is cavity cylindricality cavity, 2 inner walls of shell are provided with shielding layer 3, the one end of shell 2 is provided with mounting flange, skeleton 1 and mounting flange fixed connection, the other end of shell 2 is provided with the confession the wire that the coil was drawn forth the mouth, the wire is drawn forth a mouthful position department and is provided with the sealing rubber ring.
In actual use, the framework 1 is welded with the shell 2 through a mounting flange.
In this embodiment, the core assembly includes a connecting rod 10, an iron core 11 and an iron core plug 12 which are fixedly connected in sequence.
In actual use, the connecting rod 10 is made of non-magnetic material. The connecting rod 10 and the iron core plugs 12 are provided with external threads, internal threads are respectively arranged at two ends of the iron core 11, the connecting rod 10 and the iron core plugs 12 are respectively screwed into the internal threads at two ends of the iron core 11 to play a role in fixed connection, and a high-temperature adhesive layer is arranged at the connection position, so that the vibration resistance, impact resistance and acceleration resistance indexes of the sensor are improved.
In the embodiment, the wire rods, the wire diameters and the turns of the secondary coil I5 and the compensation coil I8 are the same; the wire rod, the wire diameter and the number of turns of the secondary coil II 7 are the same as those of the compensation coil II 9.
When the utility model is used in practice,
in this embodiment, the primary coil 4 is an enameled wire with a diameter of 0.12mm, and the secondary coil one 5 and the secondary coil two 7 are enameled wires with a diameter of 0.07 mm.
In practical use, by manufacturing a differential linear displacement sensor with a diameter of 8mm, a range of +/-30 mm, a linearity of 0.3% and an output voltage of 1.2V, the differential linear displacement sensor is exemplified, wherein the primary coil 4 is made of an enameled wire with a diameter of 0.12mm, and the secondary coil 5, the secondary coil II 7, the compensation coil I8 and the compensation coil II 9 are made of enameled wires with a diameter of 0.07 mm. The number of turns of the first secondary coil 5 is the same as that of the second secondary coil 7. The primary coil 4 is wound with 2730 turns, and the secondary coil one 5 and the secondary coil two 7 are both wound with 1038 turns. And the first compensation coil 8 and the second compensation coil 9 are wound by 1038 turns.
In this embodiment, the outer surface of the coil is provided with a vacuum varnish layer.
During actual use, because the sensor is frequently used, in order to ensure that faults cannot occur in the using process, the wound coil and the wound framework assembly need to be subjected to vacuum dip coating, and the insulation requirement is met.
In this embodiment, the framework 1 is made of hollow cylindrical stainless steel material, and end covers are arranged at two ends of the framework 1.
Wherein those matters not described in detail in the specification are prior art known to those skilled in the art.
The aforesaid, only be the embodiment of the utility model discloses an it is not right the utility model discloses do any restriction, all according to the utility model discloses the technical entity all still belongs to any simple modification, change and the equivalent structure change of doing above embodiment the utility model discloses technical scheme's within the scope of protection.
Claims (9)
1. A small volume differential transformer displacement sensor, characterized by: comprises a shell (2), a framework component arranged in the shell (2), and an iron core component,
the inner wall of the shell (2) is provided with a shielding layer (3),
the framework component comprises a framework (1) and a coil wound on the framework (1), the coil comprises a primary coil (4), a secondary coil I (5), a secondary coil II (7), a compensation coil I (8) and a compensation coil II (9), the winding directions of the secondary coil I (5) and the secondary coil II (7) are opposite,
the tail end of the secondary coil I (5) is connected with the initial end of the compensation coil I (8), the tail end of the secondary coil II (7) is connected with the initial end of the compensation coil II (9), the head end of the secondary coil I (5) is in short circuit with the head end of the secondary coil II (7),
the iron core component is located in the inner cavity of the framework (1), magnetizers are arranged at two ends of the framework (1), and the shielding layer (3), the magnetizers and the iron core component form a magnetic field channel of the sensor.
2. A small volume differential transformer displacement sensor according to claim 1, wherein: shell (2) are cavity cylindricality cavity, shell (2) inner wall is provided with shielding layer (3), the one end of shell (2) is provided with mounting flange, skeleton (1) and mounting flange fixed connection, the other end of shell (2) is provided with the confession the wire that the coil was drawn forth draws forth the mouth, the wire is drawn forth a mouthful position department and is provided with sealed rubber ring.
3. A small volume differential transformer displacement sensor according to claim 1, wherein: the iron core assembly comprises a connecting rod (10), an iron core (11) and an iron core plug (12) which are fixedly connected in sequence.
4. A small volume differential transformer displacement sensor according to claim 1, wherein: the wire rods, the wire diameters and the turns of the secondary coil I (5) and the compensation coil I (8) are the same; the wire rods, the wire diameters and the number of turns of the secondary coil II (7) and the compensation coil II (9) are the same.
5. A small volume differential transformer displacement sensor according to claim 1, wherein: the primary coil (4) adopts enameled wires with the diameter of 0.12mm, and the secondary coil I (5) and the secondary coil II (7) both adopt enameled wires with the diameter of 0.07 mm.
6. A small volume differential transformer displacement sensor according to claim 1, wherein: the number of turns of the first secondary coil (5) is the same as that of the second secondary coil (7).
7. A small volume differential transformer displacement sensor according to claim 6, wherein: the primary coil (4) is wound with 2730 turns, and the secondary coil I (5) and the secondary coil II (7) are wound with 1038 turns.
8. A small volume differential transformer displacement sensor according to claim 1, wherein: and a vacuum dip coating layer is arranged on the outer surface of the coil.
9. A small volume differential transformer displacement sensor according to claim 1, wherein: the framework (1) is made of hollow cylindrical stainless steel materials, and end covers are arranged at two ends of the framework (1).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121313908.XU CN214702114U (en) | 2021-06-13 | 2021-06-13 | Small-size differential transformer type displacement sensor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121313908.XU CN214702114U (en) | 2021-06-13 | 2021-06-13 | Small-size differential transformer type displacement sensor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN214702114U true CN214702114U (en) | 2021-11-12 |
Family
ID=78555737
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202121313908.XU Active CN214702114U (en) | 2021-06-13 | 2021-06-13 | Small-size differential transformer type displacement sensor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN214702114U (en) |
-
2021
- 2021-06-13 CN CN202121313908.XU patent/CN214702114U/en active Active
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US2494579A (en) | Differential transformer pickup unit | |
| CN107910171B (en) | Linear variable differential transformer | |
| CN102012448B (en) | Rogowski current sensor | |
| US4678991A (en) | Inductive displacement transducer with unipolar output | |
| JPH02116712A (en) | Measuring apparatus of displacement | |
| JP3930057B2 (en) | Displacement measurement system for solenoid coil | |
| CN214702114U (en) | Small-size differential transformer type displacement sensor | |
| JPH1194508A (en) | Linear displacement measuring device | |
| CN104006916A (en) | Mutual inductance type magnetic liquid micro-differential-pressure sensor | |
| JPS5932353A (en) | Reciprocally driven actuator | |
| CN109668504B (en) | Eddy current displacement sensing probe and bridge circuit suitable for strong electromagnetic field interference | |
| CN213069016U (en) | Annular coil structure for magnetic core parameter measurement | |
| CN111323738B (en) | Measuring system for three-dimensional dynamic magnetic characteristics of spherical material structure | |
| CN210863860U (en) | Rogowski coil sensor | |
| CN220626494U (en) | Closed loop fluxgate current sensor coil structure | |
| CN208720982U (en) | A kind of contactless limit displacement sensor | |
| EP0095267B1 (en) | Hydraulic motor comprising a position transducer | |
| CN2221216Y (en) | Small current high accuracy current sensor | |
| EP0431935B1 (en) | High pressure proximity sensor | |
| CN107544039B (en) | Miniature magnetic resistance magnetometer with external feedback coil | |
| EP3093859B1 (en) | Variable differential transformer position sensor with a trapezoidal primary coil | |
| CN218939424U (en) | Combined transformer | |
| CN215728386U (en) | Rogowski coil for wide-range output | |
| CN204289078U (en) | A kind of tubular conductor current instrument transformer | |
| JPH0346512A (en) | Displacement measuring device |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |