CN103968747A - Displacement control sensing device - Google Patents
Displacement control sensing device Download PDFInfo
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- CN103968747A CN103968747A CN201410182588.7A CN201410182588A CN103968747A CN 103968747 A CN103968747 A CN 103968747A CN 201410182588 A CN201410182588 A CN 201410182588A CN 103968747 A CN103968747 A CN 103968747A
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Abstract
The invention provides a displacement control sensing device based on the principle of inductance. The displacement control sensing device comprises a transmission support, a sensing mechanism, a measurement switching circuit, a transmission commutator and a transmission mechanism, wherein the sensing mechanism is arranged on the transmission support and comprises an inductance coil and a metal conductor which corresponds to the inductance coil. The transmission mechanism comprises a motor and a drive screw, wherein the motor is used for driving the transmission commutator through the drive screw so that the inductance coil and the metal conductor in the sensing mechanism can conduct opposite movement. The measurement switching circuit is electrically connected with the inductance coil of the sensing mechanism so that the spatial displacement change value corresponding to the linear displacement of the transmission commutator can be obtained through conversion of the inductance change value of the inductance coil. The displacement control sensing device can accurately measure the displacement of the transmission commutator, and non-contact accurate measurement of a measured object is achieved.
Description
Technical field
The present invention relates to displacement measurement field, relate in particular to a kind of displacement control sensing device based on inductance principle.
Background technology
Displacement measurement is the important component part of Measurement and Control System, plays vital effect at electrical tilt antenna control field.Particularly, accurately measure the change in displacement of the movable part of antenna by displacement control and measure device, feed back and further control drive motor and gear train with this, thereby realize the parts such as phase shifter and reflecting plate in fine adjustment electrical tilt antenna, effectively change the radiation scope of antenna, especially contribute to the lower decline angle of fine adjustment antenna, the reclining angle of the wave beam that refers to the radiation of antenna institute in spatial vertical direction.
Industry generally adopts linear slide block sensor based on resistance principle or rotational potentiometer device to realize the measurement control of electrical tilt antenna displacement.Its advantage is that price is lower, measuring method is simple, and shortcoming is that volume is large, environmental suitability is poor, particularly in the time that object of which movement produces space bias, easily causes measuring error.
Meanwhile, industry also has the problem that adopts mangneto formula displacement control sensing device or photoelectric displacement control sensing device to solve measuring accuracy and measuring error aspect, but its cost is too high and structure space is larger.
Visible, the multiple known electromechanical controlling device that is applied to of the prior art, the displacement control sensing device of the electromechanical controlling device of for example mobile communication antenna, general volume is bigger than normal, cost is higher, measuring accuracy is low and environmental suitability is poor, and being badly in need of has a kind of more advanced displacement control sensing device to replace.
Summary of the invention
The technical matters that the present invention mainly solves is to provide a kind of contactless displacement control sensing device based on inductance principle more accurately.
For solving the problems of the technologies described above, the technical solution used in the present invention is: a kind of displacement control sensing device for antenna beam direction control device, comprise transmission bracket, induction mechanism, measurement change-over circuit, transmission commutator, gear train, it is characterized in that:
Described induction mechanism is arranged in described transmission bracket, comprises the metallic conductor that telefault and corresponding telefault arrange;
Described gear train comprises motor and drive screw, and described motor is for driving described transmission commutator so that the telefault of described induction mechanism and metallic conductor move toward one another by drive screw;
Described measurement change-over circuit, the telefault of itself and induction mechanism is electrically connected, and draws the space displacement changing value corresponding to the linear displacement of described transmission commutator in order to the inductance changing value with telefault conversion.
The technical scheme that one embodiment of the present of invention disclose is:
Concrete, described transmission bracket is tube-in-tube structure, and described telefault is wrapped in transmission bracket, and described metallic conductor is coaxial concentric setting with described telefault; Described drive screw is coaxial concentric setting with described transmission bracket, described metallic conductor is set on described drive screw, described motor is used for driving described drive screw to rotate, and the circular motion of described drive screw is converted to the linear movement along screw axial by transmission commutator;
Preferably, in described induction mechanism, be provided with multiple telefaults that are in series and spatially arrange separately in turn, each telefault is all set in described transmission bracket periphery, corresponding each telefault is provided with the corresponding some metallic conductors of number, and each metallic conductor is along the axial array of drive screw and be fixedly connected with in turn.
Better, described each metallic conductor is in the fixing serial connection of the axle upstream sequence along drive screw or one-body molded.
Wherein, in above various technical schemes, described metallic conductor can be cone-shaped.
The outer wall of described transmission commutator is provided with the gathering sill extending vertically, the inwall of described transmission bracket is provided with the locating device matching with this gathering sill, described transmission commutator is under the drive of drive screw, be subject to the guiding of described locating device to gathering sill, axially do linear movement and be restricted to along self.Described locating device can also be pin or the axle being fixed on described transmission bracket inwall.
Axially doing the possibility of linear movement as restriction transmission commutator along it, can be also multi-edge column-shaped by the outer wall of described transmission commutator, and the outer wall shape of described transmission bracket opening part inside surface and described transmission commutator adapts.
The technical scheme that an alternative embodiment of the invention discloses is:
Concrete, the platy structure that by two bracing frames formed of described transmission bracket for connecting by back shaft, described transmission commutator threaded one end through described back shaft is connected in described drive screw, the other end clamps the metering circuit plate that comprises described inductive coil, described inductive coil is plane inductive coil, and described metallic conductor and described metering circuit plate be arranged in parallel and be fixed on the flat board on described two bracing frames.
Preferably, drive screw in described gear train comprises main transmission screw rod and auxiliary driving screw rod, between main transmission screw rod and auxiliary driving screw rod, be connected with the gear drive group for realizing speed change, described motor drives transmission commutator by described gear train, described auxiliary driving screw rod is arranged on described two bracing frames, and described transmission commutator is threadedly connected on auxiliary driving screw rod.
Described inductive coil covers copper layer etching by printed circuit board and forms, and described metallic conductor covers copper layer by printed circuit board and is etched into triangle or trapezoidal formation.
Beneficial effect of the present invention is as follows: this programme is based on inductance principle, in the time of metallic conductor and inductive coil relative motion, by measuring the variation of the inductance value producing in inductive coil, can be converted into the variation of mobile commutator displacement, thereby realize the measurement to outside measured object displacement.
Brief description of the drawings
Fig. 1 is the principle schematic that the present invention is based on the displacement control sensing device of inductance principle;
Fig. 2 is the circuit theory diagrams of the measurement conversion equipment in the present invention;
Fig. 3 is the structural representation of one embodiment of the present of invention;
Fig. 4 is the schematic diagram of cascade inductive coil and cascade metallic conductor;
Fig. 5 is the structural drawing of cone-shaped metal conductor;
Fig. 6 is the cone-shaped metal conductor structure figure with many cones of integral type.
Fig. 7 is the work demonstration graph of another embodiment of the present invention;
Fig. 8 is the schematic diagram of the metering circuit plate of another embodiment of the present invention;
Fig. 9 is the schematic diagram of the impedance circuit plate of another embodiment of the present invention;
Figure 10 is a kind of working state schematic representation of another embodiment of the present invention;
Figure 11 is the another kind of working state schematic representation of another embodiment of the present invention;
Figure 12 is a kind of structural representation of another embodiment of the present invention.
Embodiment
Below in conjunction with drawings and Examples, the present invention is described in detail.A kind of displacement control sensing device based on inductance principle that the present invention discloses, refer to Fig. 1, it comprises for the inductive coil that directly or indirectly perception unit under test moves and the measurement conversion equipment that changes and draw accordingly result data for calculating the inductance of inductive coil, signal connection device by one such as cable, intrinsic joint, can read and measure the calculation result data of conversion equipment and be used.
Fig. 2 is the circuit theory diagrams of described measurement conversion equipment.As shown in Figure 2, measure conversion equipment 303 comprise shunt capacitance 201, inductance conversion chip 202, for the capacitance resistance component 203 of metering circuit work and not shown printed circuit board, shunt capacitance 201, inductance conversion chip 202, capacitance resistance component 203 are all arranged on printed circuit board, on printed circuit board, be provided with the external interface 204 being electrically connected with multiple stitch of described inductance conversion chip 202, to realize the signal intercommunication of outer setting and displacement control sensing device.Particularly, described shunt capacitance 201 is in parallel with described inductive coil, access in the lump two stitch of inductance conversion chip 202, so that inductance conversion chip 202 can read the inductance changing value of telefault 301, and then by inductance conversion chip 202, this inductance changing value is converted to the actual spatial position change value of unit under test.
The principle that displacement control sensing device of the present invention is realized is: under the driving of motor 304, by a series of drive connection of follow-up announcement, there is linear displacement in the unit under test (not shown) that makes to be connected on transmission commutator 308, the metallic conductor 302 and transmission commutator 308 links, in the time that transmission commutator 308 is subjected to displacement, metallic conductor 302 is being axially subjected to displacement along inductive coil 301 also, the inductance value that causes inductive coil 301 changes, the inductance changing value that measured inductive coil 301 occurs measurement conversion equipment 303 converts the real space change in displacement value of metallic conductor 302 to, and by signal connection device 100, this change in displacement value is passed to outside receiver as system control panel.Because the displacement (amount) of metallic conductor 302 can be carried out associated by those skilled in the art with the displacement (amount) of the phase shift component of phase shifter in advance, thereby, outside receiver just can calculate accordingly the amount of phase shift of electric regulation antenna phase shifter and then can obtain the angle variation at the antenna beam reclining angle causing because of phase shift, then row control motor 304 moves and makes the adjustment that phase shift operates again, is achieved thus the phase control of electrical tilt antenna.Be appreciated that the effect of accurately measuring in order to reach the present invention, metallic conductor 302 can arrange in coaxial concentric mode with telefault as far as possible.
Fig. 3 is that the one that realizes circuit shown in Fig. 2 of the present invention is implemented structure.In displacement control sensing device physical arrangement as shown in Figure 3, comprise being the circular transmission bracket 307, metallic conductor 302, transmission commutator 308, inductive coil 301, metallic conductor 302 of coaxial concentric setting with drive screw 306 and for driving drive screw 306 to carry out the motor 304 of circular motion.On circular transmission bracket 307 outside surfaces, solderless wrapped connection has inductive coil 301, measures conversion equipment 303 and is arranged on transmission bracket 307 outsides.Columniform transmission commutator 308 is arranged in transmission bracket 307, occupy transmission bracket 307 open front, can slide axially along transmission bracket 307, can skid off transmission bracket 307 outsides.Transmission commutator 308 is fixedly connected with cone-shaped metal conductor 302 taper ends in the interior one end of transmission bracket 307.The outer wall of transmission commutator 308 has a gathering sill 310 vertically, be provided with the locating device matching with gathering sill 310 at the inwall of transmission bracket 307, can only do vertically rectilinear motion with restriction transmission commutator 308, this locating device can be both the securing member 311 on transmission bracket 307 inwalls that is buckled in positioning function, can be also the pin being fixed on transmission bracket 307 inwalls.Certainly, also transmission commutator 308 can be arranged to cross section and have the shape of square outline, it can also be other regular polygon outer contour shape, transmission bracket 307 coordinates with respective shapes with transmission commutator 308 coupling parts, also can reach and ensure that transmission commutator 308 slides axially and does straight-line effect in transmission bracket 307.On metallic conductor 302 is axial, be provided with the centered cylinder through hole 312 passing for drive screw 306, described centered cylinder through hole 312 apertures are greater than the diameter of drive screw 306, avoid both contact frictions, the drive screw 306 that motor 304 is exported is threaded with transmission commutator 308 through the central through hole of metallic conductor 302.In the present embodiment, drive screw 306, metallic conductor 302, transmission commutator 308 are coaxial concentric setting with transmission bracket 307, and correspondingly, inductive coil 301 and metallic conductor 302 are also coaxial setting with one heart.Transmission bracket 307 is fastenedly connected by connection member 305 with motor 304.In reality, motor 304 drives drive screw 306 to move in a circle, be subject to the restriction of locating device, transmission commutator 308 only can be in transmission bracket 307 inwall linear slide under the drive of drive screw, thereby the circular motion moment of drive screw 306 is converted to the linear movement moment of transmission commutator 308 self, and drive metallic conductor 302 to produce displacement to enter inductive coil 301, now, the inductance value of inductive coil 301 will change, the inductance value of measuring inductive coil 301 by measuring conversion equipment 303 changes, be convertible into the change in displacement of cone-shaped metal conductor 302, because transmission commutator 308 is connected with devices such as phase shifters by external drive link, therefore, the change in displacement of metallic conductor 302 also changes corresponding to the phase place of electric regulation antenna phase shifter, further change corresponding to the angle at antenna beam reclining angle, just can utilize thus displacement control sensing device of the present invention phase shift on one side to observe amount of phase shift on one side, thereby realize the phase control of electrical tilt antenna.In order to strengthen the intensity of transmission bracket 307, its outside can suitably increase reinforcement.
In above embodiment, the metallic conductor of a taper and one group of coil form a sensing unit, this sensing unit independently becomes an induction mechanism, can realize the detection of inductance changing value by the motion of this metallic conductor in this coil in this induction mechanism, according to this principle, can expand this induction mechanism by being connected in series multiple such sensing units, measure thereby realize stroke spread.
Fig. 4 is the schematic diagram of realizing the displacement control sensing device of stroke spread.As shown in Figure 4, cone-shaped metal conductor one line that at least two joints are identical is arranged and is fixed into and be connected in series in turn, correspondingly, in transmission bracket 307, be provided with multiple inductive coils that number is identical with metallic conductor number, between adjacent two inductive coils, there is spacing, approximate two spacing between the metallic conductor fixing, in like manner, between multiple inductive coils, be also connected in series in turn, form thus multiple sensing units as shown in last embodiment, thereby form the induction mechanism in the present embodiment.In the situation that ensureing that metallic conductor mobile space is enough in transmission bracket, its working condition is, suppose initial position be N level cone-shaped metal thing 302n minimum diameter everywhere in the entry position of one-level coil 3011, its inductance value is L1; Final position be N level cone-shaped metal thing 302n maximum gauge everywhere in the entry position of N level coil 301n, its inductance value is Ln; When moving to inductance measuring value the process in final position from initial position, gearshift will become greater to Ln from L1 so, its variable quantity be single-stage cone-shaped metal conductor variable quantity while moving N doubly, can realize N measurement stroke doubly by measurement conversion, thereby meet the measurement demand of contactless large stroke.Here, N can choose according to the length L of total kilometres S and single-unit cone-shaped metal thing, and N=S/L also rounds forward.
Preferably, Fig. 5 has shown a kind of structural drawing of cone-shaped metal conductor of displacement control sensing device.As shown in Figure 5, the principal character of single-stage cone-shaped metal conductor comprises cone 302, axial centre cylindrical hole 312, the external thread 316 of cone-shaped metal conductor taper end with and the internal thread 315 of thick end portion.The taper end of cone-shaped metal conductor is threaded with transmission commutator 308.Also multiple cone-shaped metal conductors as shown in Figure 5 can be connected in series successively, coordinate respectively by the taper end of each cone-shaped metal conductor and the internal and external threads of butt end, can be connected to form tandem type cone-shaped metal conductor.
In addition, Fig. 6 has also shown a kind of structural drawing of the cone-shaped metal conductor with multiple cones of integral type.As shown in Figure 6, this cone-shaped metal conductor is to be processed to form by a cylindrical metal thing one, comprises the equidirectional at least two-stage cone processing, and this tandem type cone-shaped metal conductor is also processed with axial cylindrical through hole 312, passes with convenient drive screw 306.
In the present embodiment, the material of described cone-shaped metal conductor can be aluminium, aluminium alloy, and copper or aldary can be also the alloy materials of steel or iron.
Fig. 7 to Figure 12 has also shown another embodiment of the present invention.
Refer to Fig. 7, Fig. 7 is the work demonstration graph of another embodiment of the present invention, and in figure, upper plate is metering circuit plate, and lower plate is impedance circuit plate.Metering circuit plate is along X-direction with respect to impedance circuit plate parallel, and impedance circuit plate maintains static.As shown in Figure 8, metering circuit plate is made up of printed coil (plane inductive coil), measurement change-over circuit, signal connecting line, wherein printed coil directly covers copper layer by printed circuit board and forms by etching, measure change-over circuit by be welded on same printed circuit board shunt capacitance, inductance conversion chip, realize for the capacitance resistance component of metering circuit work.
As shown in Figure 9, impedance circuit plate covers copper layer by printed circuit board and forms triangle by etching and realize, and the effect that this printed circuit board covers copper layer is the effect of metallic conductor described in the present invention.The concrete form that this application realizes is that metering circuit plate is connected with control gear train, controls gear train and drives metering circuit plate to move along X-direction; Impedance circuit plate is right against metering circuit plate below, and is fixed on bracing frame; In reality, metering circuit plate will do opposing parallel motion with respect to impedance circuit plate.
Figure 10, Figure 11 are the schematic diagram of another embodiment of the present invention under different operating state, schematic diagram when metering circuit plate runs to impedance circuit plate diverse location.
Figure 12 is the structural representation of another embodiment of the present invention.Motor 304 is arranged in the transmission bracket being made up of two bracing frames 319, two bracing frames 319 are connected by back shaft 318 and keep fixing, motor 304 passes through final drive shaft 320 output drive strength squares, and drives counter drive shaft 321 to move in a circle by a pair of gear drive group 322.Transmission commutator 317 one end are threaded with counter drive shaft 321, its other end clamping metering circuit plate 323, and can move axially along counter drive shaft 321 along being fixed on the plane that two impedance circuit plates 324 on bracing frame 319 form, now metering circuit plate 323 and the 324 opposing parallel settings of impedance circuit plate, back shaft 318 is through the hole of offering on transmission commutator 317, to support transmission commutator and to limit transmission commutator 317 and do linear movement.Metering circuit plate 323 is made up of plane inductive coil 301, measurement change-over circuit 303, signal connecting line 100, wherein plane inductive coil 301 directly covers copper layer by printed circuit board and forms by etching, measures 303 of change-over circuits and realizes by the shunt capacitance, inductance conversion chip and the capacitance resistance component for metering circuit work that are welded on same printed circuit board.Impedance circuit plate 324 covers copper layer by printed circuit board and forms triangle by etching and realize.Obviously,, according to the situation of metering circuit plate and the relative motion of impedance circuit plate, printed circuit board covers copper layer and is etched into the trapezoidal measurement requirement that also can realize.
The principle of work of the present embodiment is, motor 304 drives final drive shaft 320 to rotate, final drive shaft 320 drives counter drive shaft to rotate by gear drive group 322 and drives transmission commutator 317 along counter drive shaft axially-movable, and transmission commutator 317 drives metering circuit plate 323 opposing parallel to do rectilinear motion in impedance circuit plate.As shown in Figure 10, Figure 11, when the inductive coil of metering circuit plate is during with respect to the triangle copper sheet diverse location of impedance circuit plate, the value of the self-inductance L that it causes is also different.Owing to being approximately linear gradual change in the triangle copper sheet area of inductive coil below, therefore inductance value L also will be approximately linear gradual change.In the time that metering circuit plate moves to the other end from impedance circuit plate one end, measure change-over circuit and convert the inductance value L of approximately linear variation to corresponding numeral or simulating signal, and export by signal connecting line, thereby external control main circuit can be realized the measurement of displacement by convert variation that the variation of L is converted into displacement of software.
In electrical tilt antenna closed-loop control system, when control gear train is connected with antenna phasing unit, be connected with metering circuit plate by mechanism, in the process of adjusting antenna phasing unit, metering circuit plate also can produce displacement with respect to impedance circuit plate; And by measuring change-over circuit, change in displacement is changed into the variation that L measures, and primary controller converts the variation of L amount to by software algorithm the variation of actual displacement again, thus the phase place of accurate control antenna phase shifter.
In fact, above-described embodiment can also further be simplified, by being erected at two direct outputting powers of the motor outside bracing frame to being connected across two transmission shafts on bracing frame, transmission shaft stretches out outside transmission bracket to be connected with outside observed matter, transmission commutator in the middle of two bracing frames and transmission shaft be threaded.Thereby can realize the simplification of structure of the present invention.
In sum, displacement control sensing device involved in the present invention, it,, in outside output displacement moment, can synchronously realize the detecting accurately of the displacement to unit under test.
The foregoing is only embodiments of the invention; not thereby limit the scope of the claims of the present invention; every equivalent structure or conversion of equivalent flow process that utilizes instructions of the present invention and accompanying drawing content to do; or be directly or indirectly used in other relevant technical fields, be all in like manner included in scope of patent protection of the present invention.
Claims (11)
1. a displacement control sensing device, comprises transmission bracket, induction mechanism, measurement change-over circuit, transmission commutator, gear train, it is characterized in that:
Described induction mechanism is arranged in described transmission bracket, comprises the metallic conductor that telefault and corresponding telefault arrange;
Described gear train comprises motor and drive screw, and described motor is for driving described transmission commutator so that the telefault of described induction mechanism and metallic conductor relative motion by drive screw;
Described measurement change-over circuit, the telefault of itself and induction mechanism is electrically connected, and draws the space displacement changing value corresponding to the linear displacement of described transmission commutator in order to the inductance changing value with telefault conversion.
2. displacement control sensing device according to claim 1, is characterized in that, described transmission bracket is tube-in-tube structure, and described telefault is wrapped in transmission bracket, and described metallic conductor is coaxial concentric setting with described telefault; Described drive screw is coaxial concentric setting with described transmission bracket, described metallic conductor is set on described drive screw, described motor is used for driving described drive screw to rotate, and the circular motion of described drive screw is converted to the linear movement along screw axial by transmission commutator.
3. displacement control sensing device according to claim 2, it is characterized in that, in described induction mechanism, be provided with multiple telefaults that are in series and spatially arrange separately in turn, each telefault is all set in described transmission bracket periphery, corresponding each telefault is provided with the corresponding some metallic conductors of number, and each metallic conductor is along the axial array of drive screw and be fixedly connected with in turn.
4. displacement control sensing device according to claim 3, is characterized in that, described each metallic conductor is in the fixing serial connection of the axle upstream sequence along drive screw or one-body molded.
5. according to the displacement control sensing device described in any one in claim 2 to 4, it is characterized in that, described metallic conductor is cone-shaped.
6. according to the displacement control sensing device described in any one in claim 2 to 4, it is characterized in that, the outer wall of described transmission commutator is provided with the gathering sill extending vertically, the inwall of described transmission bracket is provided with the locating device matching with this gathering sill, described transmission commutator is under the drive of drive screw, be subject to the guiding of described locating device to gathering sill, axially do linear movement and be restricted to along self.
7. displacement control sensing device according to claim 6, is characterized in that, described locating device is pin or the axle being fixed on described transmission bracket inwall.
8. according to the displacement control sensing device described in any one in claim 2 to 4, it is characterized in that, the outer wall of described transmission commutator is multi-edge column-shaped, and the outer wall shape of described transmission bracket opening part inside surface and described transmission commutator adapts.
9. displacement control sensing device according to claim 1, it is characterized in that, the platy structure that by two bracing frames formed of described transmission bracket for connecting by back shaft, described transmission commutator threaded one end through described back shaft is connected in described drive screw, the other end clamps the metering circuit plate that comprises described inductive coil, described inductive coil is plane inductive coil, and described metallic conductor and described metering circuit plate be arranged in parallel and be fixed on the flat board on described two bracing frames.
10. displacement control sensing device according to claim 9, it is characterized in that, drive screw in described gear train comprises main transmission screw rod and auxiliary driving screw rod, between main transmission screw rod and auxiliary driving screw rod, be connected with the gear drive group for realizing speed change, described motor drives transmission commutator by described gear train, described auxiliary driving screw rod is arranged on described two bracing frames, and described transmission commutator is threadedly connected on auxiliary driving screw rod.
11. according to the displacement control sensing device described in claim 9 or 10, it is characterized in that, described inductive coil covers copper layer etching by printed circuit board and forms, and described metallic conductor covers copper layer by printed circuit board and is etched into triangle or trapezoidal formation.
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| CN201410182588.7A CN103968747B (en) | 2014-04-30 | 2014-04-30 | Bit andits control sensing device |
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| CN201410182588.7A CN103968747B (en) | 2014-04-30 | 2014-04-30 | Bit andits control sensing device |
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| CN104409854A (en) * | 2014-12-04 | 2015-03-11 | 武汉虹信通信技术有限责任公司 | Regulating device for rotating scale of tunable antenna |
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| CN109149113A (en) * | 2018-08-24 | 2019-01-04 | 武汉虹信通信技术有限责任公司 | A kind of electrical tilt antenna lower decline angle regulating device and method |
| CN109346846A (en) * | 2018-09-20 | 2019-02-15 | 摩比天线技术（深圳）有限公司 | The external transmission device of antenna |
| CN111678448A (en) * | 2020-06-17 | 2020-09-18 | 江苏南水科技有限公司 | Miniaturized pop-up fiber bragg grating joint meter and packaging method |
| CN112098472A (en) * | 2020-08-18 | 2020-12-18 | 国网河北省电力有限公司电力科学研究院 | Series SF6Decomposition product detection sensor, detection device and detection method |
| TWI722286B (en) * | 2017-06-08 | 2021-03-21 | 禾伸堂企業股份有限公司 | Electronic detection composite antenna |
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| CN109346846A (en) * | 2018-09-20 | 2019-02-15 | 摩比天线技术（深圳）有限公司 | The external transmission device of antenna |
| CN109346846B (en) * | 2018-09-20 | 2024-01-30 | 摩比天线技术（深圳）有限公司 | External transmission device of antenna |
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