CN115235550A - Knife switch state detection method and knife switch state detection device based on magnetic induction technology - Google Patents
Knife switch state detection method and knife switch state detection device based on magnetic induction technology Download PDFInfo
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- CN115235550A CN115235550A CN202211146960.XA CN202211146960A CN115235550A CN 115235550 A CN115235550 A CN 115235550A CN 202211146960 A CN202211146960 A CN 202211146960A CN 115235550 A CN115235550 A CN 115235550A
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- G01D—MEASURING NOT SPECIALLY ADAPTED FOR A SPECIFIC VARIABLE; ARRANGEMENTS FOR MEASURING TWO OR MORE VARIABLES NOT COVERED IN A SINGLE OTHER SUBCLASS; TARIFF METERING APPARATUS; MEASURING OR TESTING NOT OTHERWISE PROVIDED FOR
- G01D21/00—Measuring or testing not otherwise provided for
- G01D21/02—Measuring two or more variables by means not covered by a single other subclass
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01D—MEASURING NOT SPECIALLY ADAPTED FOR A SPECIFIC VARIABLE; ARRANGEMENTS FOR MEASURING TWO OR MORE VARIABLES NOT COVERED IN A SINGLE OTHER SUBCLASS; TARIFF METERING APPARATUS; MEASURING OR TESTING NOT OTHERWISE PROVIDED FOR
- G01D5/00—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable
- G01D5/12—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable using electric or magnetic means
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Abstract
The invention provides a method and a device for detecting the state of a disconnecting link by a magnetic induction technology. The method for detecting the state of the disconnecting link by the magnetic induction technology comprises the following steps: acquiring codes detected by all detection pieces of a first detection unit before the disconnecting link acts, and forming an initial code string; acquiring codes detected by all detection pieces of the first detection unit after the disconnecting link action is finished, and forming a termination code string; recording the start-stop change rule from the initial coding string to the end coding string; judging the coincidence relation between the start-stop change rule and the preset start-stop change rule to determine the motion state of the disconnecting link; if the start-stop change rule does not accord with the preset start-stop change rule or the code string of the detection unit meets the preset abnormal condition, the process code detection is carried out, otherwise, the action of the disconnecting link is judged to be in place. The invention solves the problems of detection holes and defects of the knife switch magnetic induction sensor in the prior art.
Description
Technical Field
The invention relates to the technical field of transformer substation disconnecting link operation and maintenance, in particular to a disconnecting link state detection method and a disconnecting link state detection device based on a magnetic induction technology.
Background
The switch switching operation is an important link in operation and maintenance of a power grid, and because the magnetic induction sensor has the advantages of non-contact work, simple structure, low cost and the like, the switch state confirmation mainly adopts the magnetic induction sensor based on the magnetic induction technology at present, but the current magnetic induction sensor generally only simply detects the switch state of the switch, namely can only detect whether the switch acts in place, cannot detect the switch process state and the switch rotation direction, and has detection holes and defects.
Meanwhile, if the existing magnetic induction sensor is placed near the sensor detection unit when a magnet is generated in the using process, the sensor detection unit can be influenced by the magnet to cause the effect of switching the detection states of the sensor, so that the normal work of the magnetic induction sensor is interfered, even the misjudgment is caused, and the security hole is formed.
In addition, the mounting bracket of the existing magnetic induction sensor needs to be temporarily customized according to different structural forms in the field, and batch production cannot be realized.
Disclosure of Invention
The invention mainly aims to provide a method and a device for detecting the state of a switch by using a magnetic induction technology, so as to solve the problems of detection holes and defects of a magnetic induction sensor of the switch in the prior art.
In order to achieve the above object, according to an aspect of the present invention, there is provided a method for detecting a state of a knife switch by magnetic induction technology, which is applied to determine an operation process of the knife switch, the method for detecting a state of a knife switch by magnetic induction technology comprising: acquiring codes detected by all detection pieces of a first detection unit before the disconnecting link acts, and forming an initial code string; acquiring codes detected by all detection pieces of the first detection unit after the disconnecting link action is finished, and forming a termination code string; recording the start-stop change rule from the initial coding string to the termination coding string; judging the coincidence relation between the start-stop change rule and the preset start-stop change rule to determine the motion state of the disconnecting link; if the start-stop change rule does not accord with the preset start-stop change rule or the code string of the detection unit meets the preset abnormal condition, the process code detection is carried out, otherwise, the action of the disconnecting link is judged to be in place.
Further, the process code detection includes: acquiring codes detected by all detection pieces of a first detection unit in the action process of the disconnecting link, and forming at least one process code string; recording the change rule of each process coding string; judging the coincidence relation between the change rule of the process coding string and the preset overall change rule to determine the motion state of the disconnecting link; if the change rule of the process coding string conforms to the preset overall change rule, the action of the disconnecting link is determined to be in place, and otherwise, the action of the disconnecting link is determined not to be in place.
Further, the process code detection includes: acquiring a plurality of process codes of different time points detected by a detection piece of a second detection unit; recording the change rules of a plurality of process codes; judging a coincidence relation between the change rules of the process codes and a preset process change rule to determine the motion state of the disconnecting link; if the start-stop change rule accords with the preset start-stop change rule and the change rule of each process code accords with the preset process change rule, judging that the disconnecting link acts in place, and otherwise, judging that the disconnecting link is abnormal.
Further, when the disconnecting link is judged to be abnormal, if the parts of the process codes accord with the preset process change rule, the disconnecting link is judged to only perform partial actions, and the action opening is obtained according to the quantity proportion of the parts which accord with the change rule of the process codes and the preset process change rule.
Further, when the disconnecting link is judged to be abnormal, if the start-stop change rule does not accord with the preset start-stop change rule and the detecting pieces of the first detecting unit which do not accord with the preset start-stop change rule are the same or the same, the disconnecting link is judged to be a first abnormal condition; if a plurality of groups of a plurality of process codes are detected by a plurality of detection pieces of the second detection unit, at least one of the groups does not accord with the corresponding preset process change rule, and the detection pieces of the first detection unit which do not accord with the preset start-stop change rule are always the same or the same, judging that the disconnecting link is in a first abnormal condition; and if all codes of the terminated code string are nonmagnetic and the codes in the multiple processes are nonmagnetic all the time, judging that the disconnecting link is in a second abnormal condition.
Further, the first abnormal condition includes that the corresponding detection piece is subjected to magnetic interference; the second abnormal condition includes the object detected by the detection member falling off.
Further, the predetermined exception condition includes: the initial code string and the termination code string are the same; and/or all codes in the termination code string are nonmagnetic.
Further, the method for detecting the state of the disconnecting link by the magnetic induction technology further comprises a calibration stage, wherein the calibration stage is used for acquiring a preset start-stop change rule and at least one of a preset overall change rule and a preset process change rule.
Further, the calibration phase comprises: the knife switch is in a closing state or an opening state; acquiring codes detected by a first detection unit in the current state of the disconnecting link, taking the codes as initial code strings, and marking the opening degree of the disconnecting link as 0 or 1; switching on and off states of the disconnecting link; in the process of switching the disconnecting link, acquiring codes detected by a first detection unit in the whole process to form a process code string as a preset overall change rule, and acquiring a plurality of process codes detected by a second detection unit to form a preset process change rule; when the disconnecting link is switched in place, acquiring codes detected by the first detection unit in the current state of the disconnecting link, and using the codes as a termination code string, wherein the opening degree of the disconnecting link is marked as 1 or 0; the above process was repeated N times.
According to another aspect of the present invention, there is provided a switch state detection device for performing the above-mentioned method of detecting a switch state of a magnetic induction technique, the switch state detection device comprising: the magnetic pieces are connected with the disconnecting link and driven by the disconnecting link to move; the first detection unit comprises a plurality of detection pieces, the detection pieces of the first detection unit are sequentially arranged along the movement track line of the magnetic piece, the magnetic piece is switched in the detection area of each detection piece of the first detection unit when moving, and the detection piece of the first detection unit detects and acquires the code of each magnetic piece.
Furthermore, the device for detecting the state of the disconnecting link further comprises a second detection unit, wherein the second detection unit comprises a plurality of detection pieces, and the first detection unit and the second detection unit are sequentially arranged along the movement track line of the magnetic piece.
Furthermore, the first detection units are multiple, and along the movement track line of the magnetic part, the two ends of the second detection unit are provided with the first detection units, and each first detection unit is correspondingly provided with the magnetic part.
Further, the device for detecting the state of the knife switch further comprises: the first mounting assembly comprises a plurality of first mounting pieces, the first mounting pieces are sequentially and rotatably connected, the number of the first mounting pieces forming the first mounting assembly can be adjusted, and the detection piece is connected with the first mounting pieces; the second installation component comprises a plurality of second installation parts, the second installation parts are sequentially and rotatably connected and form the number-adjustable setting of the second installation parts of the second installation component, and the second installation parts are arranged on the outer side of the magnetic part and connected with the disconnecting link.
By applying the technical scheme of the invention, the initial coding string and the termination coding string detected by the first detection unit are obtained, the states of the disconnecting link during the starting and the termination in the whole action are further obtained, the states of the disconnecting link are preliminarily judged according to the change rules of the initial coding string and the termination coding string, when the change rules of the starting and the termination meet certain conditions, the states of the disconnecting link are not directly obtained through the initial coding string and the termination coding string, further process coding detection is required, and the specific motion process of the disconnecting link is further detected and judged through the process coding detection. Therefore, not only can the action result of the disconnecting link be accurately judged, but also the conditions of the movement process, the rotation direction, the rotation opening degree and the like of the disconnecting link can be judged, and then the accurate and detailed disconnecting link state is obtained, and the comprehensive detection of the disconnecting link action is realized.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this application, illustrate embodiments of the invention and, together with the description, serve to explain the invention and not to limit the invention. In the drawings:
FIG. 1 shows a flow chart of a method of knife gate status detection of the present invention;
FIG. 2 is a schematic structural diagram of the device for detecting the status of the disconnecting link according to the present invention;
fig. 3 is an exploded view showing a partial structure of the knife status detecting device of fig. 2;
fig. 4 is a schematic structural diagram of the knife switch state detection device in fig. 2 when the knife switch is in a closing state;
FIG. 5 shows a top view of FIG. 4;
FIG. 6 is a schematic structural diagram of the knife switch state detection device in FIG. 2 when the knife switch is in the open state;
FIG. 7 shows a top view of FIG. 6;
FIG. 8 is a schematic diagram of the knife switch state detecting device in FIG. 2 when the knife switch is partially actuated;
fig. 9 shows a top view of fig. 8.
Wherein the figures include the following reference numerals:
10. a magnetic member; 11. a first magnetic member; 12. a second magnetic member; 13. a third magnetic member; 14. a fourth magnetic member; 20. a first detection unit; 21. a first detecting member; 22. a second detecting member; 23. a third detecting member; 24. a fourth detecting member; 30. a second detection unit; 31. a fifth detecting member; 32. a sixth detecting member; 33. a seventh detecting element; 34. an eighth detecting member; 40. a first mounting assembly; 41. a first mounting member; 50. a second mounting assembly; 51. a second mounting member.
Detailed Description
It should be noted that, in the present application, the embodiments and features of the embodiments 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, unless otherwise indicated, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs.
In the present invention, unless specified to the contrary, use of the terms of orientation such as "upper, lower, top, bottom" or the like, generally refer to the orientation as shown in the drawings, or to the component itself in a vertical, perpendicular, or gravitational orientation; likewise, for ease of understanding and description, "inner and outer" refer to the inner and outer relative to the profile of the components themselves, but the above directional words are not intended to limit the invention.
The invention provides a method and a device for detecting the state of a disconnecting link by using a magnetic induction technology, aiming at solving the problems of detection holes and defects of a disconnecting link magnetic induction sensor in the prior art.
As shown in fig. 1, a method for detecting a state of a knife switch by a magnetic induction technology is applied to determine an operation process of the knife switch, and the method for detecting a state of a knife switch by a magnetic induction technology includes: acquiring codes detected by each detection piece of the first detection unit 20 before the disconnecting link acts, and forming an initial code string; acquiring codes detected by all detection pieces of the first detection unit 20 after the disconnecting link action is finished, and forming a termination code string; recording the start-stop change rule from the initial coding string to the end coding string; judging the coincidence relation between the start-stop change rule and the preset start-stop change rule to determine the motion state of the disconnecting link; if the start-stop change rule does not accord with the preset start-stop change rule or the code string of the detection unit meets the preset abnormal condition, the process code detection is carried out, otherwise, the action of the disconnecting link is judged to be in place.
In this embodiment, the initial encoding string and the termination encoding string detected by the first detection unit 20 are obtained, and then states of the disconnecting link during the start and the termination in the whole action are obtained, the states of the disconnecting link are preliminarily determined according to the change rules of the initial encoding string and the termination encoding string, when the start-stop change rule meets a certain condition, it is indicated that the states of the disconnecting link are not directly obtained through the initial encoding string and the termination encoding string, further process encoding detection is required, and the specific motion process of the disconnecting link is further detected and determined through the process encoding detection. Therefore, not only can the action result of the disconnecting link be accurately judged, but also the conditions of the movement process, the rotation direction, the rotation opening degree and the like of the disconnecting link can be judged, and then the accurate and detailed disconnecting link state is obtained, and the comprehensive detection of the disconnecting link action is realized.
Because the disconnecting link state detection device of this embodiment is provided with two sets of first detection units 20, two sets of first detection units 20 can form two sets of initial encoding strings and termination encoding strings, so when recording the start-stop change rule, two sets of initial encoding strings and termination encoding strings form two start-stop change rules, and when judging the coincidence relation between the start-stop change rule and the predetermined start-stop change rule, the two start-stop change rules are compared with the corresponding predetermined start-stop change rule respectively. As for the judgment result, as long as there is a case where the start-stop change rule does not conform to the predetermined start-stop change rule or the code string of the detection unit satisfies the predetermined abnormal condition, the process code detection is required. Of course, the number of the first detecting units 20 may also be adjusted as required, and the corresponding initial encoding string, the ending encoding string, the start-stop change rule and the predetermined start-stop change rule may also correspond to each other.
It should be noted that, the process code detection described in this embodiment has two specific implementations:
in a first mode
In this embodiment, the process refers to the code detected by each detector of the first detection unit 20 during the operation of the knife switch, that is, the code between the initial code string and the final code string, and the code is compared as the process code string.
Specifically, process code detection includes: acquiring codes detected by each detection piece of the first detection unit 20 in the action process of the disconnecting link, and forming at least one process code string; recording the change rule of each process coding string; judging the coincidence relation between the change rule of the process coding string and the preset integral change rule so as to determine the motion state of the disconnecting link; and if the change rule of the process coding string conforms to the preset overall change rule, judging that the disconnecting link acts in place, otherwise, judging that the disconnecting link does not act in place.
For the case that two sets of first detecting units 20 are provided in the present embodiment, the above process may be performed on the two sets of first detecting units 20, and only if the change rules of the process encoding strings of the two sets of first detecting units 20 all conform to the corresponding predetermined overall change rule, it can be determined that the knife switch is in place.
The method only needs to compare codes detected by the first detection unit 20 in the whole process of the disconnecting link including the initial and the termination, and other detection units can be omitted, so that the method is relatively simple in structural arrangement and method logicality, but the method only can further judge whether the disconnecting link is in place or not and cannot judge the rotating direction, the rotating opening and the like of the disconnecting link because the first detection unit 20 relates to the initial and the termination more and the sensing capability of the intermediate process is not strong. If it is necessary to determine the turning direction, turning opening, etc. of the disconnecting link, the following second mode is required.
Mode two
In this embodiment, the process is not an intermediate process of the first detecting unit 20, but only the second detecting unit 30, and the second detecting unit 30 is the same as the first detecting unit 20 in basic structure, and the difference is that the arrangement positions are different, specifically, when the knife switch is not operated in the closing state or the opening state, the first detecting unit 20 is aligned with the corresponding magnetic member 10, the second detecting unit 30 is not aligned with the magnetic member 10, and the second detecting unit 30 is located between two sets of the first detecting units 20. During the rotation of the knife switch, the magnetic member 10 rotates and changes position to be detected by the second detecting unit 30. The process code detection is to judge the movement process of the knife switch through the code detected by the second detection unit 30.
Specifically, process code detection includes: acquiring a plurality of process codes of different time points detected by the detecting member of the second detecting unit 30; recording the change rules of a plurality of process codes; judging the coincidence relation between the change rules of the process codes and the preset process change rules to determine the motion state of the disconnecting link; if the start-stop change rule accords with the preset start-stop change rule and the change rule of each process code accords with the preset process change rule, judging that the disconnecting link acts in place, and otherwise, judging that the disconnecting link is abnormal.
Because the second detecting unit 30 of this mode can detect the path condition in the movement process of the disconnecting link, compared with the first detecting unit 20, the second detecting unit can be more specific to the middle process of the disconnecting link, and thus, the detection of the starting and ending of the disconnecting link by the first detecting unit 20 is matched with the detection of the movement process of the disconnecting link by the second detecting unit 30, so that the whole process of the disconnecting link is detected, and the comprehensive detection is realized. And since the second detection unit 30 can reflect the middle action process of the knife switch, the rotation direction and the rotation opening of the knife switch in the abnormal state can be judged according to the detection of the second detection unit 30, and the reason of the abnormal state of the knife switch can be judged.
In the second aspect, more information can be obtained than in the first aspect, and the detection and determination of the operation of the knife switch are more comprehensive, so the installation method in the second aspect is preferable. Meanwhile, the first mode and the second mode are not in conflict, so that the first mode and the second mode can be adopted simultaneously as required, that is, the process coding detection comprises the judgment of the intermediate process of the first detection unit 20 and the judgment of the process of the second detection unit 30, and the two modes are combined, so that the process coding detection result is more accurate and reliable.
In the second aspect, when the knife switch is determined to be abnormal, the specific abnormality of the knife switch can be further determined, so that the following more specific cases are further classified:
1. if the parts of the plurality of process codes conform to the preset process change rule, the knife switch is judged to only perform partial action, namely, the knife switch does not completely perform the action, but performs partial action, more specifically, the knife switch generally performs the first half part of the complete action of opening or closing, and the performed partial action is normal and performed according to a preset mode. At this time, a quantity ratio of a part of the change rule of the plurality of process codes detected by the second detecting unit 30 and the predetermined process change rule may be obtained, where the ratio represents an action ratio completed by the knife switch, and thus represents an action opening degree, and the action opening degree is obtained.
2. If the start-stop change rules do not accord with the preset start-stop change rules and the detection pieces of the first detection unit 20 which do not accord with the preset start-stop change rules are always the same or the same, judging that the disconnecting link is in a first abnormal condition;
if the detecting elements of the second detecting unit 30 detect multiple sets of multiple process codes, and at least one of the multiple sets of multiple process codes does not conform to the corresponding predetermined process variation rule, and the detecting elements of the first detecting unit 20 that do not conform to the predetermined start-stop variation rule are always the same or several, determining that the knife switch is in a first abnormal condition;
the two cases can exist independently or simultaneously. Both of the two situations mean that the codes detected by one or some detecting elements are not always the same as the codes in the predetermined rule, while the codes detected by other detecting elements are the same as the codes in the predetermined rule, so that it is highly likely that the one or some detecting elements are subjected to magnetic interference of an external magnet, and the code abnormality detected by only the part of detecting elements occurs, and the abnormality is the first abnormality.
3. If all the codes of the termination code string of all the first detection units 20 are nonmagnetic, and the process codes are nonmagnetic all the time, the disconnecting link is determined to be in the second abnormal condition.
In this case, all codes in the termination code string are non-magnetic, that is, all detecting elements of the first detecting unit 20 do not detect the magnetic element 10 when the operation is completed, and at this time, there are two cases, one of which is that the termination code string is non-magnetic under normal conditions after the disconnecting link operation is completed, and is a normal setting; the second is that the knife switch action is actually abnormal, and may not be in place, or may be a fault of a structure class, at this time, the further determination is performed through the process detection codes, if a plurality of process codes are also non-magnetic all the time, it is described that each detection piece of the second detection unit 30 does not detect the magnetic piece 10 in the knife switch action process, in this case, it is very likely that the detection object of the detection piece, that is, the magnetic piece 10 is dropped off, and the like, so that the action of the knife switch is not reflected to the detection piece through the magnetic piece 10, which is the above-mentioned second abnormal situation.
Of course, the specific situation of the knife switch abnormality is not limited to the above-mentioned several situations, and there may be other abnormal situations, and further comprehensive judgment may be performed by combining the codes, the process code strings, the process codes, and the like detected by the first detection unit 20 and the second detection unit 30.
In this embodiment, the predetermined exception condition includes two kinds, that is, the initial code string and the final code string are the same, and all codes in the final code string are nonmagnetic. The method comprises the following steps that an initial coding string and a final coding string are the same, wherein the initial coding string and the final coding string are the same before and after the disconnecting link acts and are normally set; the second is that the operation of the knife switch is abnormal, for example, the conditions such as no operation lead to the fact that the front and back initial coding strings and the final coding string are the same, and at this time, whether the knife switch is in place or not can not be accurately judged from the change rule between the initial coding string and the final coding string, so that the process coding detection is needed. For the case that all codes in the termination code string are nonmagnetic, that is, the third one in the more specific case when the knife switch is abnormal, the description is omitted here. Of course, the predetermined abnormal condition may not only include the above two cases listed in this embodiment, but also adjust the specific condition according to the actual situation.
In this embodiment, since the structure of the disconnecting link state detecting device is not uniquely fixed, but can be adjusted according to the need, the codes and the like detected by the disconnecting link state detecting device, and the start-stop change rule, the predetermined overall change rule and the predetermined process change rule which play a standard role are not fixed, and therefore, the change rule needs to be calibrated before the disconnecting link is put into normal use, that is, the disconnecting link state detecting method of the magnetic induction technology further includes a calibration stage, and the calibration stage is used for acquiring the predetermined start-stop change rule, and at least one of the predetermined overall change rule and the predetermined process change rule. By combining the first mode and the second mode as an example, the calibration stage needs to obtain the predetermined start-stop change rule, the predetermined overall change rule and the predetermined process change rule.
Specifically, the calibration phase includes: the knife switch is in a closing state or an opening state; acquiring codes detected by each first detection unit 20 in the current state of the disconnecting link, and using the codes as corresponding initial code strings, wherein the opening degree of the disconnecting link is marked as 0 or 1; switching on and off states of the disconnecting link; in the process of switching the disconnecting link, acquiring codes detected by each first detection unit 20 in the whole process to form a corresponding process code string as a corresponding predetermined overall change rule, and simultaneously acquiring a plurality of process codes detected by the second detection unit 30 to form a predetermined process change rule; when the disconnecting link is switched in place, acquiring codes detected by each first detection unit 20 in the current state of the disconnecting link, and using the codes as corresponding termination code strings, wherein the opening degree of the disconnecting link is marked as 1 or 0, generally speaking, the closing degree is marked as 0, and the opening degree is marked as 1; repeating the above process for N times, and performing further verification to ensure the calibration accuracy, wherein N can be set correspondingly according to the situation.
As shown in fig. 2 to 9, the present embodiment further provides a switch state detection apparatus for performing the switch state detection method of the magnetic induction technology, where the switch state detection apparatus includes: the device comprises a plurality of magnetic pieces 10 and a first detection unit 20, wherein the magnetic pieces 10 are connected with a disconnecting link and driven by the disconnecting link to move; the first detecting unit 20 includes a plurality of detecting elements, each detecting element of the first detecting unit 20 is sequentially arranged along the moving track line of the magnetic element 10, the magnetic element 10 is switched in the detecting area of each detecting element of the first detecting unit 20 when moving, and the detecting element of the first detecting unit 20 detects and acquires the code of each magnetic element 10.
The magnetic members 10 of the present embodiment are four, two of which are divided into two groups, namely a first group of magnetic members and a second group of magnetic members; the first detecting units 20 are also provided with two, the first detecting units are a first group of first detecting units and a second group of first detecting units respectively, each group of first detecting units 20 comprises two detecting parts, the two detecting parts are respectively matched with the two magnetic parts 10, so that the first group of magnetic parts and the first group of first detecting units are aligned and installed when the disconnecting link is assembled, the second group of magnetic parts and the second group of first detecting units are aligned and installed, namely, each first detecting unit 20 is correspondingly provided with the magnetic parts 10, and corresponding matching between the magnetic parts 10 and the detecting parts is realized. Of course, the specific number and the specific installation mode of the components can be adjusted as required, and due to the calibration stage, different installation and matching modes can be calibrated through the calibration stage, so that the corresponding change rules can be obtained.
In the present embodiment, a manner of detecting magnetism of the magnetic member 10 is adopted, so that the detecting member adopts a magnetic detecting member, and accordingly, various acquired codes are magnetic codes, and according to a magnetic condition that the magnetic member 10 can be detected by the detecting member, the magnetic codes of the present embodiment have three kinds, i.e., N-level, S-level and non-magnetic.
The device for detecting the state of the disconnecting link of the present embodiment further includes a second detecting unit 30, and the second detecting unit 30 includes a plurality of detecting elements, and the first detecting unit 20 and the second detecting unit 30 are sequentially arranged along the moving track line of the magnetic element 10. The detecting members in this embodiment are identical, that is, a plurality of detecting members are provided, which are divided into a first detecting unit 20 and a second detecting unit 30 according to their positions, roles, and the like. In the first detecting unit 20 divided in this embodiment, two detecting elements aligned with the first set of magnetic elements in the switch-off state or the switch-on state of the knife switch are a first set of first detecting unit, two detecting elements aligned with the second set of magnetic elements are a second set of first detecting unit, and a detecting element located between the first set of first detecting unit and the second set of first detecting unit, that is, a detecting element through which the magnetic element 10 passes in the action process of the knife switch, is a second detecting unit 30. This arrangement is such that each code in the initial code string of the two first detection units 20 is necessarily not nonmagnetic when the knife switch is not active.
The second detecting unit 30 of this embodiment includes four detecting elements, and when the knife switch does not operate, the four detecting elements and the magnetic element 10 are all staggered, and the codes detected by the detecting elements are non-magnetic.
Each detection piece of this embodiment has the physical address information of diverse, and the detection circuitry is connected with each detection piece between electricity, can gather the physical address information and the different state information of each detection piece, identity information and the magnetic encoding that detects promptly to according to the identity of each detection piece of physical address information discernment, according to the position state information of state information judgement switch rotating member, can prevent that illegal personnel from adopting the normal work of the malicious interference device of magnet.
For convenience of the following description, two magnetic members 10 in the first set of magnetic members are referred to as a first magnetic member 11 and a second magnetic member 12, two magnetic members 10 in the second set of magnetic members are referred to as a third magnetic member 13 and a fourth magnetic member 14, when the knife switch is not operated, the detecting member aligned with the first magnetic member 11 is a first detecting member 21, the detecting member aligned with the second magnetic member 12 is a second detecting member 22, the detecting member aligned with the third magnetic member 13 is a third detecting member 23, the detecting member aligned with the fourth magnetic member 14 is a fourth detecting member 24, and the four detecting members of the second detecting unit 30 are a fifth detecting member 31, a sixth detecting member 32, a seventh detecting member 33, and an eighth detecting member 34, respectively. And the first detector 21, the second detector 22, the fifth detector 31, the sixth detector 32, the seventh detector 33, the eighth detector 34, the third detector 23 and the fourth detector 24 are arranged in sequence along the circumferential direction of the knife switch state detector.
It should be noted that the magnetic member 10 of the present embodiment can trigger only one detecting member at a time. When the magnetic member 10 is installed, the distance between the detecting members is adjusted so that the magnetic member is separated from the detecting range of one detecting member and just enters the detecting range of another adjacent detecting member.
In this embodiment, the disconnecting link state detecting device further includes a first mounting component 40 and a second mounting component 50, the first mounting component 40 includes a plurality of first mounting parts 41, the detecting part is connected with the first mounting parts 41, and the detecting part is mounted and fixed in a one-to-one corresponding manner in this embodiment. The first mounting members 41 are rotatably connected in sequence to form a circular ring. The first mounting parts 41 of the present embodiment are provided with mounting holes, and the mounting holes are formed through the pin shafts in the mounting holes of the two adjacent first mounting parts 41, so that the two first mounting parts 41 are mounted and connected together, chain-like structures with different lengths can be formed, and the two first mounting parts 41 can rotate as required. The quantity of the first installation parts 41 forming the first installation assembly 40 can be adjusted, so that when the sizes of the matched disconnecting switches are different and the like, the quantity of the arranged magnetic parts 10 and the quantity of the arranged detection parts are different, at the moment, the quantity of the first installation parts 41 can be adjusted, the first installation parts 41 are detached or added, the diameter of the circular ring formed by the first installation parts 41 is changed, the requirements of installation and detection are met, and the installation of the disconnecting switches with different structural sizes is adaptable. Similar to the structure of the first mounting assembly 40, the second mounting assembly 50 also includes a plurality of second mounting parts 51, the second mounting parts 51 are disposed outside the magnetic element 10, the magnetic element 10 is accommodated in the second mounting parts 51, and the second mounting parts 51 are connected with the knife switch and move under the driving of the knife switch. In the present embodiment, the matching manner between the second mounting parts 51 is the same as that of the first mounting parts 41, the second mounting parts 51 are sequentially and rotatably connected, and the number of the second mounting parts 51 forming the second mounting assembly 50 can be adjusted, and the specific matching manner can refer to the first mounting parts 41, which is not described herein again. The sizes of the first installation component 40 and the second installation component 50 are matched with each other in actual use and are adjusted together, so that matched installation and detection are realized.
For the convenience of understanding, two specific embodiments from the closing state to the opening state are listed below in a manner of adopting a second process code detection manner. And stipulate, when the detector detects the N pole, define and encode as "1"; when the S pole is detected, the code is defined as "2", and when the magnetic pole is not detected, the code is defined as "0".
Example one
When the knife switch is in a closing state, as shown in fig. 4 and 5, the first group of magnetic members and the first group of first detection units are arranged oppositely, at this time, codes detected by the first group of first detection units are respectively '1' and '2', and an initial code string formed is '12', that is, the two magnetic members 10 are respectively N-pole and S-pole orientation detection members; similarly, the second set of magnetic members is disposed opposite to the second set of first detecting units, and at this time, the initial code string detected by the second set of first detecting units is "12", that is, the two magnetic members 10 are respectively an N-pole and an S-pole facing detecting member; at the moment, the detection circuit compares the initial coding strings of the first group of first detection units and the second group of first detection units with the pre-stored coding strings, and comprehensively judges that the disconnecting link is in a closing state and the opening degree is 0;
when the knife switch rotating component starts to rotate, the first magnetic component 11 sequentially passes through the second detecting component 22, the fifth detecting component 31, the sixth detecting component 32, the seventh detecting component 33, the eighth detecting component 34 and the third detecting component 23, so that the magnetic coding change rule of the first detecting component 21 is "102", the magnetic coding change rule of the second detecting component 22 is "2010", the magnetic coding change rules of the fifth detecting component 31, the sixth detecting component 32, the seventh detecting component 33 and the eighth detecting component 34 are all "02010", the magnetic coding change rule of the third detecting component 23 is "10201", and the magnetic coding change rule of the fourth detecting component 24 is "20102".
As shown in fig. 6 and 7, after the knife switch is rotated, the termination code string obtained by the first group of first detecting units is "20", and the termination code string obtained by the second group of first detecting units is "12".
Judging a coincidence relation between the start-stop change rule and a preset start-stop change rule, wherein the start code string detected by the first group of first detection units is switched from '12' to '20' according to the set start-stop change rule; the starting code string detected by the first detection units of the second group is switched from '12' to the ending code string '12' according to a set starting and stopping change rule;
although the start-stop change rules of the first group of first detection units and the second group of first detection units both conform to the predetermined start-stop change rule, the start code string and the end code string of the second group of first detection units are the same, and it may be because the second group of magnetic elements do not move, or because the codes before and after the movement are the same, it cannot be determined whether the knife switch moves in place, so further determination needs to be performed for process code detection.
Acquiring a plurality of process codes of different time points detected by the detecting element of the second detecting unit 30, and recording the change rules of the plurality of process codes, namely the change rules of the magnetic codes of the fifth detecting element 31, the sixth detecting element 32, the seventh detecting element 33 and the eighth detecting element 34;
the change rules of the multiple process codes and the preset process change rule are judged to be in accordance, the change rules of the start and stop already meet the preset change rules of the start and stop, and meanwhile, the magnetic code change rules of the fifth detecting element 31, the sixth detecting element 32, the seventh detecting element 33 and the eighth detecting element 34 are 02010 which are respectively in accordance with the respective preset process change rules, so that the magnetic codes detected by the first detecting unit 20 and the second detecting unit 30 can be switched according to the preset change rules, the state of the disconnecting link is judged to be in place, and the disconnecting link is completed.
Example two
As in the first embodiment, when the knife switch is in a closed state, as shown in fig. 4 and 5, the first group of magnetic members is disposed opposite to the first group of first detecting units, at this time, codes detected by the first group of first detecting units are "1" and "2", respectively, and an initial code string formed is "12", that is, the two magnetic members 10 are N-pole and S-pole facing detecting members, respectively; similarly, the second set of magnetic members is disposed opposite to the second set of first detecting units, and at this time, the initial code string detected by the second set of first detecting units is "12", that is, the two magnetic members 10 are respectively an N-pole and an S-pole facing detecting member; at the moment, the detection circuit compares the initial coding strings of the first group of first detection units and the second group of first detection units with the pre-stored coding strings, and comprehensively judges that the disconnecting link is in a closing state and the opening degree is 0;
when the disconnecting link rotating component starts to rotate, the first magnetic part 11 sequentially passes through the second detecting part 22, the fifth detecting part 31, the sixth detecting part 32 and the seventh detecting part 33, so that the magnetic coding change rule of the first detecting part 21 is "10", the magnetic coding change rule of the second detecting part 22 is "2010", the magnetic coding change rules of the fifth detecting part 31 and the sixth detecting part 32 are both "02010", the magnetic coding change rule of the seventh detecting part 33 is "0201", the magnetic coding change rule of the eighth detecting part 34 is "02", the magnetic coding change rule of the third detecting part 23 is "10", and the magnetic coding change rule of the fourth detecting part 24 is "2010".
As shown in fig. 8 and 9, after the knife switch is rotated, the terminated code string obtained by the first group of first detecting units is "00", and the terminated code string obtained by the second group of first detecting units is "00".
Judging the coincidence relation between the start-stop change rule and the preset start-stop change rule, wherein the initial coding string detected by the first group of first detection units is switched from '12' to '00' as the final coding string, and the initial coding string is not switched according to the start-stop change rule; the initial code string detected by the second group of first detection units is switched from '12' to '00' as the final code string, and is not switched according to the start-stop change rule, and meanwhile, two codes in the final code strings of the two groups of first detection units are '0', so that further judgment needs to be carried out on process code detection.
Acquiring a plurality of process codes of different time points detected by the detecting element of the second detecting unit 30, and recording the change rules of the plurality of process codes, namely the change rules of the magnetic codes of the fifth detecting element 31, the sixth detecting element 32, the seventh detecting element 33 and the eighth detecting element 34;
and judging the coincidence relation between the change rules of the plurality of process codes and the preset process change rule, wherein the start-stop change rule does not accord with the preset start-stop change rule, so that the abnormity of the disconnecting link is judged.
When the anomaly is determined, it is determined whether the process-coded portion detected by the second detecting unit 30 meets a predetermined process variation rule, the magnetic-code variation rules of the fifth detecting element 31 and the sixth detecting element 32 are "02010", the magnetic-code variation rule of the seventh detecting element 33 is "0201", the magnetic-code variation rule of the eighth detecting element 34 is "02", and both the rules meet the corresponding predetermined process variation rule or the previous portion of the predetermined process variation rule, specifically referring to the following table,
| magnetic encoding change rule (brake-off in place) | Magnetic encoding change rule (partial opening) | |
| First detecting member | 102 | 10 |
| Second detecting member | 2010 | 2010 |
| Fifth detecting member | 02010 | 02010 |
| Sixth detecting member | 02010 | 02010 |
| Seventh detecting element | 02010 | 0201 |
| Eighth detecting member | 02010 | 02 |
| Third detecting member | 10201 | 10 |
| Fourth detecting member | 20102 | 2010 |
Judging that the knife switch does not complete the whole action, but the knife switch normally carries out a part of actions;
the action opening is obtained according to the ratio of the number of the parts in accordance with the change rule of the plurality of process codes and the preset process change rule, the first magnetic part 11 rotates to the position aligned with the seventh detecting part 33 due to the position aligned with the first detecting part 21, when the switch is in place, the first detecting part 21 should be aligned with the third detecting part 23, and therefore, the first magnetic part 11 rotates by 4/6, namely, the opening n =4/6 of the knife switch.
It should be noted that, a plurality in the above embodiments means at least two.
From the above description, it can be seen that the above-described embodiments of the present invention achieve the following technical effects:
1. the problem that a knife switch magnetic induction sensor in the prior art has detection holes and defects is solved;
2. the action result of the disconnecting link can be accurately judged, and the conditions of the movement process, the rotation direction, the rotation opening degree and the like of the disconnecting link can be judged, so that the accurate and detailed disconnecting link state is obtained, and the comprehensive detection of the disconnecting link action is realized;
3. the state acquisition is realized by adopting a magnetic detection piece and a magnetic piece, and a non-contact detection mode is safe and reliable and does not influence the action of the disconnecting link;
4. the detection pieces can identify N poles, S poles and non-magnetism, a first detection unit is adopted for combined judgment, and meanwhile a single group of first detection units adopts two detection pieces for coding combination, so that device misjudgment caused by interference due to manual adoption of external magnets is prevented;
5. the abnormity of the knife switch action, the structure loosening and the like can be judged and identified through logic;
6. the installation component adopts a chain structure and a universal modular assembly mode, and the number of modules can be increased and decreased according to actual field conditions so as to adapt to installation conditions of the disconnecting links with different diameters and different shapes.
It is to be understood that the above-described embodiments are only a few, but not all, embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
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 is intended to include the plural unless the context clearly dictates otherwise, and it should be further understood that the terms "comprises" and/or "comprising," when used in this specification, specify the presence of features, steps, operations, devices, components, and/or combinations thereof.
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 capable of operation in sequences other than those illustrated or described herein.
The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (13)
1. The method for detecting the state of the disconnecting link by the magnetic induction technology is characterized by being applied to judging the action process of the disconnecting link and comprising the following steps of:
acquiring codes detected by all detection pieces of a first detection unit (20) before the disconnecting link acts, and forming an initial code string;
acquiring codes detected by all detection pieces of the first detection unit (20) after the disconnecting link action is finished, and forming a termination code string;
recording the start-stop change rule from the initial coding string to the termination coding string;
judging the coincidence relation between the start-stop change rule and a preset start-stop change rule to determine the motion state of the disconnecting link;
and if the start-stop change rule does not accord with the preset start-stop change rule or the code string of the detection unit meets a preset abnormal condition, carrying out process code detection, otherwise, judging that the disconnecting link acts in place.
2. The method for detecting the state of the knife switch of the magnetic induction technology according to claim 1, wherein the process code detection comprises:
acquiring codes detected by each detection piece of the first detection unit (20) in the action process of the disconnecting link, and forming at least one process code string;
recording the change rule of each process coding string;
judging a coincidence relation between the change rule of the process coding string and a preset overall change rule so as to determine the motion state of the disconnecting link;
and if the change rule of the process coding string conforms to the preset overall change rule, judging that the action of the disconnecting link is in place, otherwise, judging that the action of the disconnecting link is not in place.
3. The method for detecting the state of the knife switch of the magnetic induction technology according to claim 1, wherein the process code detection comprises:
acquiring a plurality of process codes of different time points detected by a detection piece of a second detection unit (30);
recording the change rules of the plurality of process codes;
judging the coincidence relation between the change rules of the process codes and the preset process change rules to determine the motion state of the disconnecting link;
if the change rule of the start-stop state accords with the preset change rule of the start-stop state and the change rule of each process code accords with the preset change rule of the process, the action of the disconnecting link is judged to be in place, and if not, the disconnecting link is judged to be abnormal.
4. The method of claim 3, wherein when the knife switch is determined to be abnormal,
if the parts of the process codes conform to the preset process change rule, the disconnecting link is judged to only perform partial actions, and the action opening degree is obtained according to the quantity proportion of the parts conforming to the change rule of the process codes and the preset process change rule.
5. The method of claim 3, wherein when the knife switch is determined to be abnormal,
if the start-stop change rule does not accord with the preset start-stop change rule and the detecting pieces of the first detecting unit (20) which do not accord with the preset start-stop change rule are always the same or the same, judging that the disconnecting link is in a first abnormal condition;
if a plurality of groups of the plurality of process codes are detected by a plurality of detection pieces of the second detection unit (30), at least one of the groups does not accord with the corresponding predetermined process change rule, and the detection pieces of the first detection unit (20) which do not accord with the predetermined start-stop change rule are always the same or the same, determining that the knife switch is in a first abnormal condition;
and if all codes of the terminated code string are nonmagnetic and the process codes are nonmagnetic all the time, judging that the disconnecting link is in a second abnormal condition.
6. The method of claim 5, wherein the method further comprises the steps of,
the first abnormal condition comprises that the corresponding detection piece is subjected to magnetic interference;
the second abnormal condition includes that the object detected by the detecting member is fallen off.
7. The method of claim 1, wherein the predetermined abnormal condition comprises:
the initial encoding string and the termination encoding string are the same; and/or
All codes in the termination code string are nonmagnetic.
8. The method according to claim 1, further comprising a calibration stage, wherein the calibration stage is used to obtain the predetermined start-stop variation rule and at least one of a predetermined overall variation rule and a predetermined process variation rule.
9. The method for detecting the state of the knife switch of the magnetic induction technology according to claim 8, wherein the calibration stage comprises:
the knife switch is in a closing state or an opening state;
acquiring a code detected by the first detection unit (20) in the current state of the disconnecting link, and using the code as the initial code string, wherein the opening degree of the disconnecting link is marked as 0 or 1;
switching on and off states of the disconnecting link;
in the process of switching the disconnecting link, acquiring codes detected by the first detection unit (20) in the whole process to form a process code string as the preset overall change rule, and acquiring a plurality of process codes detected by the second detection unit (30) to form a preset process change rule;
when the disconnecting link is switched in place, acquiring a code detected by the first detection unit (20) in the current state of the disconnecting link, and using the code as the termination code string, wherein the opening degree of the disconnecting link is marked as 1 or 0;
the above process was repeated N times.
10. A switch state detection device for performing the method of any one of claims 1 to 9, the device comprising:
the magnetic pieces (10) are connected with the disconnecting link and driven by the disconnecting link to move;
a first detection unit (20), wherein the first detection unit (20) comprises a plurality of detection pieces, the detection pieces of the first detection unit (20) are sequentially arranged along the movement track line of the magnetic piece (10), the magnetic piece (10) is switched in the detection area of each detection piece of the first detection unit (20) when moving, and the detection piece of the first detection unit (20) detects and acquires the code of each magnetic piece (10).
11. The knife status detecting device according to claim 10, further comprising a second detecting unit (30), wherein the second detecting unit (30) comprises a plurality of detecting members, and the first detecting unit (20) and the second detecting unit (30) are arranged in sequence along a moving track line of the magnetic member (10).
12. The device for detecting the state of the disconnecting link according to claim 11, wherein the first detecting unit (20) is plural, and the first detecting unit (20) is disposed at both ends of the second detecting unit (30) along a moving track line of the magnetic member (10), and each of the first detecting units (20) is correspondingly disposed with the magnetic member (10).
13. The knife status detecting device according to claim 10, further comprising:
the first mounting assembly (40), the first mounting assembly (40) comprises a plurality of first mounting parts (41), the first mounting parts (41) are sequentially and rotatably connected, the number of the first mounting parts (41) forming the first mounting assembly (40) can be adjusted, and the detecting part is connected with the first mounting parts (41);
the second mounting assembly (50), the second mounting assembly (50) includes a plurality of second installed parts (51), second installed part (51) is rotatable coupling in order, and forms the adjustable setting of the quantity of second installed part (51) of second mounting assembly (50), second installed part (51) set up in magnetic member (10) outside, and with the switch is connected.
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