CN214309015U - Mutual coupling type ball passing detection sensor - Google Patents
Mutual coupling type ball passing detection sensor Download PDFInfo
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- CN214309015U CN214309015U CN202021062186.0U CN202021062186U CN214309015U CN 214309015 U CN214309015 U CN 214309015U CN 202021062186 U CN202021062186 U CN 202021062186U CN 214309015 U CN214309015 U CN 214309015U
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- 238000001514 detection method Methods 0.000 title claims abstract description 236
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E30/00—Energy generation of nuclear origin
- Y02E30/30—Nuclear fission reactors
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Abstract
The utility model discloses a ball detection sensor is crossed to cross coupling type, this ball detection sensor is crossed to cross coupling type includes: the device comprises a first magnetic core positioning device, a first magnetic core, a second magnetic core, a first detection coil, a second detection coil, a third magnetic core, a fourth magnetic core, a third detection coil, a fourth detection coil and a controller, wherein the first magnetic core and the second magnetic core are detachably coupled with each other, the third magnetic core and the fourth magnetic core are detachably coupled with each other, the first detection coil is wound on the first magnetic core, the second detection coil is wound on the second magnetic core and a ball passing pipeline, the third detection coil is wound on the third magnetic core, the fourth detection coil is wound on the fourth magnetic core and the ball passing pipeline, and the controller acquires a ball passing signal after the first detection coil and the third detection coil are respectively connected into two adjacent bridge arms of a bridge. The mutual coupling type ball passing detection sensor has the advantages of no damage to pipelines during installation, simple coil manufacturing, good parameter consistency and the like.
Description
Technical Field
The utility model relates to a check out test set technical field, in particular to mutual coupling type crosses ball detection sensor.
Background
Currently, the pebble bed high temperature gas cooled nuclear reactor receives high attention from many countries because of its inherent safety and the ability to load and unload fuel without shutdown. The ball passing counter is used for detecting and counting graphite matrix fuel balls of the pebble bed high-temperature gas cooled reactor nuclear power station. The accurate detection and recording of the loading and unloading quantity of the graphite-based fuel spheres are helpful for calculating the residual condition of the nuclear fuel of the reactor core, thereby judging whether to continue adding new fuel spheres and the adding quantity into the reactor core. Therefore, accurate counting of the ball-passing counter is an important guarantee for normal operation of the ball-bed high-temperature gas-cooled reactor.
The sensors used in the current ball passing counter are mostly semicircular coating coils or built-in annular coils. The built-in annular coil needs to damage a pipeline when being installed, and if a problem occurs in the use, the pipeline needs to be damaged and then maintained or replaced, so that the construction difficulty and time are increased; the detection coil of the semicircular cladding type sensor is complex in manufacturing process, the consistency of parameters of the manufactured detection coil is difficult to guarantee, the ball passing sensor is difficult to debug, the consistency of the sensor is difficult to guarantee that the detection device needs to be debugged again after the sensor is replaced, and inconvenience is brought to use.
Disclosure of Invention
The present invention aims at solving at least one of the technical problems in the above-mentioned technology to a certain extent.
Therefore, an object of the utility model is to provide a ball detection sensor is crossed to cross coupling type, do not destroy pipeline, coil simple manufacture when having the installation, advantages such as the parameter uniformity is good can effectively detect the graphite base member fuel ball in the ball pipeline, and detects the rate of accuracy height.
In order to achieve the above object, the utility model provides a mutual coupling type crosses ball detection sensor is proposed in the first aspect, include: the first magnetic core positioning device is arranged on the outer wall of the ball passing pipeline; the first magnetic core and the second magnetic core are detachably coupled with each other, wherein the second magnetic core is arranged on the outer wall of the ball passing pipeline through a first magnetic core positioning device; the first detection coil is wound on the first magnetic core, and the second detection coil is wound on the second magnetic core and the ball passing pipeline; the third magnetic core and the fourth magnetic core are detachably coupled with each other, wherein the fourth magnetic core is arranged on the outer wall of the ball passing pipeline through a first magnetic core positioning device; the third detection coil is wound on the third magnetic core, and the fourth detection coil is wound on the fourth magnetic core and the ball passing pipeline; and the controller is used for exciting the first detection coil and the third detection coil by adopting sinusoidal alternating-current signals after the first detection coil and the third detection coil are respectively connected into two adjacent bridge arms of the bridge, so that when graphite matrix fuel balls sequentially pass through the second detection coil and the fourth detection coil, the impedance of the first detection coil and the impedance of the third detection coil change, the change value of the impedance is converted into the change value of voltage through the bridge, and the ball passing signal is extracted.
The utility model discloses a cross coupling type crosses ball detection sensor, through the controller after first detecting coil and third detecting coil insert the adjacent two bridge arms of electric bridge respectively, adopt sinusoidal alternating signal to excite first detecting coil and third detecting coil respectively, make when graphite base body fuel ball passes through second detecting coil and fourth detecting coil in proper order, the impedance of first detecting coil and third detecting coil produces the change, and change the change value of impedance into the change value of voltage through the electric bridge, draw and obtain the ball signal. Therefore, the method has the advantages of no damage to the pipeline during installation, simple coil manufacturing, good parameter consistency and the like, can effectively detect the graphite matrix fuel ball in the ball pipeline, and has high detection accuracy.
In addition, according to the present invention, the mutual coupling type ball passing detection sensor can further have the following additional technical features:
further, the mutual coupling type passing ball detecting sensor further includes: the first magnetic core positioning device is arranged on the outer wall of the ball passing pipeline, and the first magnetic core positioning device and the reference positioning device are arranged vertically; and the winding positioning device is arranged on the outer wall of the passing ball pipeline and is perpendicular to the reference positioning device, and a positioning wire groove is arranged on the winding positioning device and is used for fixing a second detection coil and a fourth detection coil.
Further, the mutual coupling type passing ball detecting sensor further includes: a shield case, the first magnetic core positioning device, the first magnetic core, the second magnetic core, the first detection coil, the second detection coil, the third magnetic core, the fourth magnetic core, the third detection coil, the fourth detection coil, and the winding positioning device being all disposed in the shield case.
Further, the mutual coupling type passing ball detecting sensor further includes: second magnetic core positioner, second magnetic core positioner sets up in the shielded enclosure, second magnetic core positioner is used for fixing first magnetic core with the third magnetic core.
Specifically, the second detection coil and the fourth detection coil are spaced apart by a radius of the graphite-based fuel sphere.
Specifically, the number of coil shots of the first detection coil and the third detection coil is N, the number of coil turns of the second detection coil and the fourth detection coil is 1, and N is a positive integer.
Specifically, the controller includes: and the processing circuit is used for carrying out differential amplification, band-pass filtering, phase-sensitive detection, low-pass filtering and adjustable gain amplification processing on the electric signals to obtain the passing ball signals.
Additional aspects and advantages of the invention will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the invention.
Drawings
The above and/or additional aspects and advantages of the present invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:
fig. 1 is a schematic structural diagram of a mutual coupling type passing ball detection sensor according to an embodiment of the present invention;
fig. 2 is a schematic structural diagram of a mutual coupling type passing ball detection sensor according to another embodiment of the present invention;
fig. 3 is a schematic diagram of a partial structure of a mutual coupling type passing ball detection sensor according to an embodiment of the present invention;
fig. 4 is a schematic view of a partial structure of a mutual coupling type passing ball detecting sensor according to another embodiment of the present invention;
FIG. 5 is a schematic diagram of a bridge circuit according to an embodiment of the present invention;
fig. 6 is a functional block diagram of a ball passing information processing circuit according to an embodiment of the present invention; and
fig. 7 is a flowchart of a detection method of a mutual coupling type passing ball detection sensor according to an embodiment of the present invention.
Detailed Description
Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are exemplary and intended to be illustrative of the present invention and should not be construed as limiting the invention.
The following describes a mutual coupling type ball passing detection sensor and a detection method of the mutual coupling type ball passing detection sensor according to embodiments of the present invention with reference to the drawings.
Fig. 1 is a schematic diagram of a mutual coupling type passing ball detection sensor according to an embodiment of the present invention.
As shown in fig. 1, a mutual coupling type ball passing detection sensor according to an embodiment of the present invention may include: a first magnetic core positioning device 10, a first magnetic core 20, a second magnetic core 30, a first detection coil 40, a second detection coil 50, a third magnetic core 60, a fourth magnetic core 70, a third detection coil 80, a fourth detection coil 90 and a controller (not shown in fig. 1).
Wherein, first magnetic core positioner 10 sets up on the outer wall of crossing the bulb pipeline, and first magnetic core 20 and the mutual coupling setting of second magnetic core 30 detachable, wherein, second magnetic core 30 sets up on the outer wall of crossing bulb pipeline 1 through first magnetic core positioner 10, and first detection coil 40 is convoluteed on first magnetic core 20, and second detection coil 50 is convoluteed on second magnetic core 30 and cross bulb pipeline 1. The third magnetic core 60 and the fourth magnetic core 70 are detachably coupled to each other, wherein the fourth magnetic core 70 is disposed on the outer wall of the ball passing pipe 1 through the first magnetic core positioning device 10, the third detection coil 80 is wound on the third magnetic core 60, and the fourth detection coil 90 is wound on the fourth magnetic core 90 and the ball passing pipe 1. And a controller for exciting the first detection coil 40 and the third detection coil 80 with sinusoidal alternating current signals after the first detection coil 40 and the third detection coil 80 are respectively connected to two adjacent arms of the bridge, so that when the graphite matrix fuel spheres 2 sequentially pass through the second detection coil 50 and the fourth detection coil 90, the impedances of the first detection coil 40 and the third detection coil 80 change, the impedance change values are converted into voltage change values through the bridge, and the sphere passing signals are extracted.
It should be noted that the first magnetic core 20 and the second magnetic core 30 described in this embodiment form a complete magnetic core after being detachably coupled to each other, that is, the first magnetic core 20 and the second magnetic core 30 are two halves of a complete magnetic core; the third core 60 and the fourth core 70 described in this embodiment form a complete core after being detachably coupled to each other, i.e., the third core 60 and the fourth core 70 are two halves of a complete core. The first magnetic core 20, the second magnetic core 30, the third magnetic core 60, and the fourth magnetic core 70 may be C-shaped or U-shaped magnetic cores.
In one embodiment of the present invention, the distance between the second detection coil 50 and the fourth detection coil 90 may be the radius of the graphite-based fuel sphere 2.
In another embodiment of the present invention, the number of coil shots of the first detection coil 40 and the third detection coil 80 may be N, and the number of coil turns of the second detection coil 50 and the fourth detection coil 90 may be 1, where N is a positive integer. It should be noted that, in the embodiment, the numbers of the coils of the first detection coil 40 and the third detection coil 80 should be ensured to match the impedance of the bridge circuit.
In an embodiment of the present invention, the controller may further include a processing circuit for performing differential amplification, band-pass filtering, phase-sensitive detection, low-pass filtering, and adjustable gain amplification processing on the electrical signal to obtain the ball signal.
Specifically, the first detection coil 40 and the third detection coil 80 are respectively connected to two adjacent bridge arms of the bridge, the controller may employ a DDS (Direct Digital Synthesis, DDS signal generator) Digital signal Synthesis technology to generate sinusoidal signals to excite the first detection coil 40 and the third detection coil 80, when the graphite-based fuel sphere passes through the second detection coil 50 and the fourth detection coil 90 in sequence, the impedances of the first detection coil 40 and the third detection coil 80 will change, and the impedance change is converted into a voltage change through the processing of the bridge circuit (i.e., the processing circuit), and further the bridge circuit (i.e., the processing circuit) can also adopt the technologies of differential amplification, band-pass filtering, phase-sensitive detection, low-pass filtering, adjustable gain amplification and the like to extract a weak ball-passing detection signal to form a ball-passing signal Uo, and reliable ball-passing detection is realized through the judgment of Uo.
In an embodiment of the present invention, as shown in fig. 2, the mutual coupling type ball passing detection sensor may further include: a datum locator 100 and a winding locator 110.
The reference positioning device 100 is disposed on the outer wall of the ball passing pipe 1, wherein the first magnetic core positioning device 10 is perpendicular to the reference positioning device 100, the winding positioning device 110 is disposed on the outer wall of the ball passing pipe 1 and perpendicular to the reference positioning device 100, and a positioning slot is disposed on the winding positioning device 110 for fixing the second detection coil 50 and the fourth detection coil 90.
In the embodiment of the present invention, the installation positions of the respective components in the mutual coupling type ball-passing detection sensor are determined by the reference positioning device 100, the second magnetic core 30 and the fourth magnetic core 70 are vertically arranged and fixed on the first magnetic core positioning device 10, and the winding positioning device 110 is used for positioning the second detection coil 50 and the fourth detection coil 90.
The second detection coil 50 and the fourth detection coil 90 can be manufactured on site, and are manufactured by winding enameled wires along the outer wall of the spherical pipeline 1 in a circle, and are fixed in the wire grooves of the winding positioning device 110, and the distance between the two wire grooves can be half of the diameter of the graphite matrix fuel ball 2 to be detected. The number of turns of the coils wound on the first magnetic core 20 and the third magnetic core 60 is multiple, and the field winding is troublesome, so that generally the first detection coil 40 and the third detection coil 80 are manufactured in advance, the number of turns is generally hundreds of turns, and the specific number of turns should be ensured to be matched with the output impedance of the detection circuit.
In order to improve the detection sensitivity of the sensor and improve the anti-interference capability of the sensor, in an embodiment of the present invention, as shown in fig. 3, the mutual coupling type ball passing detection sensor may further include: a shielding case 1000, wherein the first magnetic core positioning device 10, the first magnetic core 20, the second magnetic core 30, the first detection coil 40, the second detection coil 50, the third magnetic core 60, the fourth magnetic core 70, the third detection coil 80, the fourth detection coil 90 and the winding positioning device 110 may be disposed inside the shielding case 1000.
As shown in fig. 3, the mutual coupling type ball passing detection sensor may further include: and a second core positioning device 120, the second core positioning device 120 being disposed in the shielding case 1000, the second core positioning device 120 being configured to fix the first core 20 and the third core 60. Specifically, the opening directions of the first core 20 and the third core 60, and/or the second core 30 and the fourth core 70 of the C-shape (or U-shape) can be aligned without a gap therebetween through the viewing port when the shielding case 1000 is installed, and then the shielding case 1000 is fixed to prevent the electromagnetic interference from the external environment.
In an embodiment of the present invention, the mutual coupling type ball passing detection sensor may have the following advantages:
firstly, the pipeline is not required to be damaged during installation, and the problem that the pipeline is required to be damaged by the built-in annular coil sensor is solved.
And the second detection coil 50 and the fourth detection coil 90 of the sensor only have one turn, so that the sensor can be wound on site conveniently. The coil manufacturing process is simple, and the consistency of sensor parameters is good.
③, compare with semicircle cladding formula sensor, the utility model discloses a sensor coil is the confined coil, crosses the detection of graphite nodule and belongs to the internal field and detect, and detectivity is high, and the interference killing feature is strong.
And fourthly, only one turn of coil of the second detection coil 50 and the fourth detection coil 90 of the sensor is contacted with the high-temperature pipeline, so that the problem of short circuit between the coils caused by aging of enameled wires in the traditional multi-turn sensor is solved, and the sensor can work at higher detection temperature.
The present invention is described in detail below with reference to fig. 1-6:
the utility model discloses a ball detection sensor is crossed to cross coupling type can include: the device comprises a first magnetic core positioning device 10, a first magnetic core 20, a second magnetic core 30, a first detection coil 40, a second detection coil 50, a third magnetic core 60, a fourth magnetic core 70, a third detection coil 80, a fourth detection coil 90, a reference positioning device 100, a winding positioning device 110, a shielding shell 1000, a second magnetic core positioning device 120 and a controller.
The first magnetic core 20, the second magnetic core 30, the third magnetic core 60 and the fourth magnetic core 70 are made of C-shaped (or U-shaped) ferrite materials, and have the functions of increasing magnetic permeability, reducing eddy current loss and enhancing a ball passing signal. The first magnetic core positioning device 10, the reference positioning device 100, the winding positioning device 110 and the second magnetic core positioning device 120 are all made of polyimide materials with good high temperature resistance, the reference positioning device 100 is used for determining the installation positions of all components in the sensor, the second magnetic core 30 and the fourth magnetic core 70 are vertically arranged and fixed on the first magnetic core positioning device 10, and the winding positioning device 110 is used for positioning the second detection coil 50 and the fourth detection coil 90.
When installing the mutual coupling type ball passing detection sensor of the present application, a relevant person may first paste a circle of polyester imide adhesive tape on the ball passing pipe 1 to prevent the broken metal chips around the ball passing pipe 1 from damaging the coil, and certainly, the insulating adhesive tape of other materials may be used instead to realize the function of protecting the coil. Then, according to the requirement for designing the position of the mutual coupling type ball-passing detection sensor, the reference positioning device 100 is fixed on the pipeline through bolts for determining the installation position of each element in the sensor, and then the first magnetic core positioning device 10 and the winding positioning device 110 are fixed on the outer wall of the ball-passing pipeline 1, and the second magnetic core 30 and the fourth magnetic core 70 are both installed on the magnetic core positioning block (as shown in fig. 1).
Then, the second detection coil 50 and the fourth detection coil 90 are fabricated in situ, wherein the second detection coil 50 is taken as an example, as shown in fig. 4. The enameled wire is wound around the positioning wire grooves of the second magnetic core 30 and the winding positioning device 110 respectively, pulling force with fixed size is applied to two ends of the enameled wire, then the intersection points (namely, the welding points 3) are welded together to form a coil which bypasses the outer wall of the ball pipeline 1 for a circle, the coil is the second detection coil 50, the second detection coil 50 can be manufactured and installed on site because the number of turns of the second detection coil 50 is only one, and the same function can be realized by winding the second detection coil 50 for several turns, but the field winding is only troublesome. Compared with other types of sensors, the sensor improves the installation efficiency and reduces the manufacturing difficulty of the sensor coil.
The first detection coil 40 and the third detection coil 80 respectively wound on the first magnetic core 20 and the third magnetic core 60 are finished products in a workshop, and the number of turns N of the first detection coil 40 and the third detection coil 80 may be 200, but other numbers of turns may be possible according to actual situations, and the invention is not limited herein.
After all the positioning devices and the magnetic cores are installed and the second detection coil 50 and the fourth detection coil 90 are also manufactured, the shielding case 1000 is installed, as shown in fig. 3, the shielding case 1000 is composed of two semicircular metals, one of which is provided with four-core connection terminals, the connection terminals are correspondingly connected with the four wire ends of the first detection coil 40 and the third detection coil 80, the first magnetic core 20 and the third magnetic core 60 are fixed on the inner side of the shielding case 1000, and the two semicircular metal shielding cases are oppositely fixed on the ball passing pipe 1 through bolts. The installation position of the shielding case 1000 can be adjusted through the viewing port during installation, so that the end surfaces of the first magnetic core 20 and the second magnetic core 30, and the end surfaces of the third magnetic core 60 and the fourth magnetic core 70 are horizontally aligned and have no gap therebetween after the installation is completed, thereby ensuring the optimal electromagnetic coupling effect. And after the installation is finished, the observation port is closed by using a bolt. The shielding shell 1000 can effectively prevent the sensor from being subjected to electromagnetic interference of the surrounding environment, and improve the anti-interference, capacity and detection accuracy of the over-ball detection.
The utility model discloses a DDS digital signal synthesis technique produces the sinusoidal excitation signal that the frequency is 3KHz as the input signal Usin of sensor, also can use the sinusoidal excitation signal of other frequencies according to the influence of aspects such as the speed that is detected the ball or material. Fig. 5 shows the connection relationship between the first detection coil 40 and the third detection coil 80 and the detection bridge at the time of passing ball detection. Z1 and Z2 are fixed resistances (or combinations of resistances, inductances, and capacitances) in the bridge circuit, and L1 and L2 are the first detection coil 40 and the third detection coil 80 (whose impedances are Z3 and Z4, respectively). In order to ensure the optimal detection sensitivity, it is required to substantially satisfy | Z1| ═ Z2| ═ Z3| ═ Z4|, and it is preferable that the impedance error is less than 1%.
According to the principle of electromagnetic induction, when an excitation signal is applied to the first detection coil 40 and the third detection coil 80, an alternating magnetic flux is generated around the first detection coil 40 and the third detection coil 80, and the second detection coil 50 and the fourth detection coil 90 also generate a varying induced current and a varying magnetic flux under the influence of the alternating magnetic flux. The first detection coil 40 and the second detection coil 50, and the third detection coil 80 and the fourth detection coil 90 interact with each other, and when the impedances of the second detection coil 50 and the fourth detection coil 90 change, the impedances of the first detection coil 40 and the third detection coil 80 also change. When graphite spheres or graphite matrix fuel spheres sequentially pass through the second detection coil 50 and the fourth detection coil 90, eddy currents are generated, so that the apparent impedances of the second detection coil 50 and the fourth detection coil 90 change, the impedances of the first detection coil 40 and the third detection coil 80 also change, and the spherical information is determined by determining the changes in the impedances of the first detection coil 40 and the third detection coil 80.
The specific detection method is shown in fig. 6. The first detection coil 40 and the third detection coil 80 are respectively connected into a bridge circuit, the bridge circuit can convert the weak change of the impedance of the first detection coil 40 and the third detection coil 80 into voltage output, voltage signals U1 and U2 output by the first detection coil 40 and the third detection coil 80 are subjected to technologies such as differential amplification, band-pass filtering, phase-sensitive detection, low-pass filtering, adjustable gain amplification and the like, weak ball passing detection signals are extracted and amplified to obtain final ball passing signals Uo, the ball passing signals are detected in real time through a single chip microcomputer software algorithm, and the function of detecting and counting passing balls is achieved.
To sum up, the utility model discloses cross coupling type crosses ball detection sensor, through the controller after first detection coil and third detection coil insert the adjacent two bridge arms of electric bridge respectively, adopt sinusoidal alternating signal to excite first detection coil and third detection coil respectively for when graphite matrix fuel ball passes through second detection coil and fourth detection coil in proper order, the impedance of first detection coil and third detection coil produces the change, and change the change value of impedance into the change value of voltage through the electric bridge, draw and obtain the ball signal. Therefore, the method has the advantages of no damage to the pipeline during installation, simple coil manufacturing, good parameter consistency and the like, can effectively detect the graphite matrix fuel ball in the ball pipeline, and has high detection accuracy.
Fig. 7 is a flowchart of a detection method of a mutual coupling type passing ball detection sensor according to an embodiment of the present invention.
As shown in fig. 7, the detection method of the mutual coupling type ball passing detection sensor according to the embodiment of the present invention may include the following steps:
and S1, acquiring an electric signal when the graphite-based fuel ball passes through the second detection coil and the fourth detection coil in sequence.
And S2, processing the electric signal to obtain a ball passing signal.
And S3, judging the unloading quantity of the graphite matrix fuel spheres through the sphere passing signal.
In one embodiment of the present invention, the distance between the second detection coil and the fourth detection coil is the radius of the graphite-based fuel sphere.
In an embodiment of the present invention, the electric signal is processed to obtain a ball signal, including: and carrying out differential amplification, band-pass filtering, phase-sensitive detection, low-pass filtering and adjustable gain amplification on the electric signal to obtain a passing ball signal.
It should be noted that, the details that are not disclosed in the detection method of the mutual coupling type ball passing detection sensor according to the embodiment of the present invention are referred to, and detailed descriptions thereof are omitted here for details.
In conclusion, according to the utility model discloses according to the detection method of ball detection sensor is crossed to cross-coupling type, at first acquire the graphite base body fuel ball and pass through the signal of telecommunication when second detection coil and fourth detection coil in proper order, then handle the signal of telecommunication, obtain the ball signal, judge the uninstallation quantity of graphite base body fuel ball through the ball signal at last. Therefore, the graphite matrix fuel ball in the ball pipeline can be effectively detected, and the detection accuracy is high.
In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", and the like, indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for convenience of description and simplicity of description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore, should not be construed as limiting the present invention.
Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless specifically limited otherwise.
In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," and "fixed" are to be construed broadly and may, for example, be fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.
In the present application, unless expressly stated or limited otherwise, the first feature may be directly on or directly under the second feature or indirectly via intermediate members. Also, a first feature "on," "over," and "above" a second feature may be directly or diagonally above the second feature, or may simply indicate that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature may be directly under or obliquely under the first feature, or may simply mean that the first feature is at a lesser elevation than the second feature.
In the description herein, references to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above are not necessarily intended to refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, various embodiments or examples and features of different embodiments or examples described in this specification can be combined and combined by one skilled in the art without contradiction.
Although embodiments of the present invention have been shown and described, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention, and that variations, modifications, substitutions and alterations can be made to the above embodiments by those of ordinary skill in the art without departing from the scope of the present invention.
Claims (7)
1. A mutually coupled ball-passing detection sensor, comprising:
the first magnetic core positioning device is arranged on the outer wall of the ball passing pipeline;
the first magnetic core and the second magnetic core are detachably coupled with each other, wherein the second magnetic core is arranged on the outer wall of the ball passing pipeline through a first magnetic core positioning device;
the first detection coil is wound on the first magnetic core, and the second detection coil is wound on the second magnetic core and the ball passing pipeline;
the third magnetic core and the fourth magnetic core are detachably coupled with each other, wherein the fourth magnetic core is arranged on the outer wall of the ball passing pipeline through a first magnetic core positioning device;
the third detection coil is wound on the third magnetic core, and the fourth detection coil is wound on the fourth magnetic core and the ball passing pipeline;
and the controller is used for exciting the first detection coil and the third detection coil by adopting sinusoidal alternating-current signals after the first detection coil and the third detection coil are respectively connected into two adjacent bridge arms of the bridge, so that when graphite matrix fuel balls sequentially pass through the second detection coil and the fourth detection coil, the impedance of the first detection coil and the impedance of the third detection coil change, the change value of the impedance is converted into the change value of voltage through the bridge, and the ball passing signal is extracted.
2. The mutually coupled ball-passing detection sensor of claim 1, further comprising:
the first magnetic core positioning device is arranged on the outer wall of the ball passing pipeline, and the first magnetic core positioning device and the reference positioning device are arranged vertically;
and the winding positioning device is arranged on the outer wall of the passing ball pipeline and is perpendicular to the reference positioning device, and a positioning wire groove is arranged on the winding positioning device and is used for fixing a second detection coil and a fourth detection coil.
3. The mutually coupled ball-passing detection sensor of claim 2, further comprising:
a shield case, the first magnetic core positioning device, the first magnetic core, the second magnetic core, the first detection coil, the second detection coil, the third magnetic core, the fourth magnetic core, the third detection coil, the fourth detection coil, and the winding positioning device being all disposed in the shield case.
4. The mutually coupled ball-passing detection sensor of claim 3, further comprising:
second magnetic core positioner, second magnetic core positioner sets up in the shielded enclosure, second magnetic core positioner is used for fixing first magnetic core with the third magnetic core.
5. The mutually coupled type passing ball detection sensor according to any one of claims 1 to 4, wherein the second detection coil and the fourth detection coil are spaced apart by a radius of the graphite-based fuel ball.
6. The mutual coupling type passing ball detection sensor according to any one of claims 1 to 4, wherein the number of coil pounds of the first detection coil and the third detection coil is N, and the number of coil turns of the second detection coil and the fourth detection coil is 1, wherein N is a positive integer.
7. The mutually coupled ball-passing detection sensor according to claim 1, wherein the controller comprises:
and the processing circuit is used for carrying out differential amplification, band-pass filtering, phase-sensitive detection, low-pass filtering and adjustable gain amplification processing on the electric signals to obtain the passing ball signals.
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| CN111707328A (en) * | 2020-06-10 | 2020-09-25 | 清华大学 | Mutual coupling type ball passing detection sensor and detection method thereof |
| CN111707328B (en) * | 2020-06-10 | 2024-06-18 | 清华大学 | Mutual coupling type ball passing detection sensor and detection method thereof |
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