CN111811384A - Detection device and method for indicating relative displacement of rod and numerical value of gap - Google Patents
Detection device and method for indicating relative displacement of rod and numerical value of gap Download PDFInfo
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- CN111811384A CN111811384A CN201910294106.XA CN201910294106A CN111811384A CN 111811384 A CN111811384 A CN 111811384A CN 201910294106 A CN201910294106 A CN 201910294106A CN 111811384 A CN111811384 A CN 111811384A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
- G01B7/00—Measuring arrangements characterised by the use of electric or magnetic techniques
- G01B7/02—Measuring arrangements characterised by the use of electric or magnetic techniques for measuring length, width or thickness
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
- G01B7/00—Measuring arrangements characterised by the use of electric or magnetic techniques
- G01B7/14—Measuring arrangements characterised by the use of electric or magnetic techniques for measuring distance or clearance between spaced objects or spaced apertures
Abstract
The invention relates to a detection device and a method for indicating the relative displacement of a rod and a numerical value of a gap, which detect the linear motion of the indicating rod by utilizing a magnetic grid and a magnetic field induction sensor (a Hall element or a magnetoresistive sensor and the like), and is a non-contact measurement method with high precision, oil pollution interference resistance and relatively low cost; when the detection of the close-contact gap numerical value, the repulsion gap numerical value and the rod piece displacement in each conversion process is realized, the system can be self-checked in each conversion process, and the detection result error caused by the fault of the detection system is prevented. Compared with the existing method for detecting the position of the linear reciprocating motion part by two detection heads, the method improves the real-time property of detection data and reduces the operation amount by setting a zero coordinate, and in addition, the self-checking of the detection system is carried out in each conversion motion process of the indication rod by the special arrangement of the two detection heads relative to the position of the detected magnetic grid, the credibility of the detection data is judged, and partial system faults are detected.
Description
Technical Field
The present invention relates to a switch switching device for monitoring the gap value of the indicating rod of the switch machine and the relative displacement of the indicating rod during the switching process of the switch machine, and more particularly to a device and a method for detecting the relative displacement of the indicating rod and the gap value.
Background
In a switch machine, a display rod is connected to a movable portion of a switch point in response to the position of the movable portion, an inspection notch is formed in the display rod, an inspection part is provided in the switch machine, and when the inspection notch of the display rod is not aligned with the position of the inspection part, the inspection part cannot fall into the inspection notch of the display rod, and the switch machine is in a failure state, which is called a notch failure. Usually, each indication rod is composed of two pieces of structures, which are called an indication rod left rod and an indication rod right rod respectively, and also called an indication rod main rod and an indication rod auxiliary rod, the description is made by the indication rod left rod and the indication rod right rod, two inspection gaps are respectively arranged on the indication rod left rod and the indication rod right rod, one is a close-contact inspection gap, the other is a repulsion-separation inspection gap, the close-contact gap position of the indication rod left rod is matched with the repulsion-separation gap position of the indication rod right rod, the repulsion-separation gap position of the indication rod left rod is matched with the close-contact gap position of the indication rod right rod, and when the close-contact gap position of one rod and the repulsion-separation gap position of the other rod are matched with the inspection part, the inspection part can normally fall into the inspection gap.
Due to the change of the using environment temperature, the abrasion of a middle hole and a pin and the change of a turnout under the action of various influence factors after long-term use, the position of a detection notch of a switch machine indication rod can change relative to an inspection part, when the change numerical value exceeds the limit value, the inspection part can not fall into the detection notch of the indication rod, the switch machine can not be connected with an indication circuit, the turnout for the change can not allow a train to pass, the transportation efficiency can be influenced, particularly, the clearance numerical value between a close-contact detection notch and the close-contact detection part is small, and the notch clamping fault is easy to occur.
Equipment maintenance personnel desire to adjust the change in the position of the inspection notch before it indicates that the change in the position of the inspection notch exceeds a threshold value to reduce card notch failures. In order to monitor the position change of the rod inspection notch, related companies develop various monitoring devices, which can be generally classified into two categories, one is contact type detection and the other is non-contact type detection. In the contact detection mode, like a ball-touch type, a ball-touch is arranged on the side wall of the part to be detected, the ball-touch extends out of a detection surface for a certain value, when the ball-touch is contacted with the detected surface, an alarm is given to warn that the value of the notch is close to the limit value of the notch, the fault rate is high in the use of the scheme, and the fault of the notch in the use of the switch machine is artificially increased, so that the method is gradually eliminated. The non-contact detection mainly comprises video and electromagnetic methods, and the scheme solves the problem that contact detection equipment increases the gap fault of a point switch card, but the existing scheme still has certain problems in use, such as large data volume of the video method, more complex data communication structure, slightly poor data real-time performance, poor pollution resistance, small data volume of the electromagnetic method and better real-time performance, but the existing method only detects a close-close gap, does not repel the gap data, does not have displacement data of turnout conversion, and can not find error data detected by monitoring system abnormity.
For convenience of description, the specified gap value is a relative distance value between the specified side face of the close-contact inspection part or the specified side face of the repulsion inspection part and the specified side face of the indicating rod for inspecting the gap along the motion direction of the indicating rod, when the value is proper, the inspection part can enter the corresponding inspection gap, and when the value is improper, the inspection part can not enter the inspection gap.
Disclosure of Invention
The invention aims to provide a detection device and a detection method for indicating the relative displacement of a rod and a notch numerical value, so as to simultaneously detect the close contact notch, the repulsion notch numerical value and the relative displacement of the rod.
The technical scheme of the invention is as follows: relates to a detection device for indicating the relative displacement of a rod and a gap value, which is characterized in that: at least comprises the following steps: the device comprises a left rod of a display rod, a right rod of the display rod, a first close-fit inspection part, a second close-fit inspection part, a first repulsion inspection part and a second repulsion inspection part, wherein the first close-fit inspection part and the first repulsion inspection part are used for inspecting the notch position of the left rod of the display rod, the second close-fit inspection part and the second repulsion inspection part are used for inspecting the notch position of the right rod of the display rod, a first magnetic grid, a second magnetic grid, a first detection head, a second detection head, a third detection head and a fourth detection head are arranged on the surface of the left rod of the display rod, the second magnetic grid is arranged on the surface of the right rod of the display rod, the first magnetic grid and the second magnetic grid are provided with periodic magnetic field distribution generated by magnetic materials and magnetic materials which are periodically distributed, the periodic change direction of the magnetic field is parallel to the linear motion direction of the left rod of the display rod and the right rod of the display rod, and the first detection head, the second detection head, the first detection head and the second detection head are, The third detection head and the fourth detection head are composed of a magnetic field detection sensor and a matching circuit thereof and are used for detecting the magnetic fields of the first magnetic grid and the second magnetic grid.
The first detection head and the third detection head are in a group, are distributed along the reciprocating motion direction of the right rod of the indication rod, are fixedly installed and are used for detecting the magnetic field of a second magnetic grid on the right rod of the indication rod; the second detection head and the fourth detection head are in a group, are distributed along the reciprocating motion direction of the left rod of the indication rod and are fixedly installed, and are used for detecting the magnetic field of the first magnetic grid on the left rod of the indication rod.
The indication rod right rod has a movement travel range, the first detection head is positioned in the lowest detectable range of the second magnetic grid magnetic field in the range, and when the indication rod right rod moves to a fixed position relative to the first detection head, the third detection head is separated from the lowest detectable range of the second magnetic grid magnetic field or enters the lowest detectable range of the second magnetic grid magnetic field; the indication rod left rod has a movement travel range, in which the fourth detection head is positioned in the lowest detectable range of the first magnetic grid magnetic field, and when the indication rod left rod moves to a fixed position relative to the fourth detection head, the second detection head is separated from the lowest detectable range of the first magnetic grid magnetic field or enters the lowest detectable range of the first magnetic grid magnetic field.
The lowest detectable range of the magnetic field is that the hardware of the detection head and the corresponding software can identify the magnetic field and calculate the detection sensitivity value of the periodic position of the corresponding magnetic field.
The magnetic field detection sensor includes, but is not limited to, a hall sensor, a magnetoresistive sensor.
A detection method for representing the relative displacement of a rod and a notch value at least comprises the following steps:
1) after the first close-fit inspection part enters the left rod close-fit inspection notch of the indicating rod, the position of the left rod of the indicating rod is adjusted, the left rod of the indicating rod moves rightwards until the left side surface of the first close-fit inspection part is attached to the left side surface of the close-fit inspection notch, and the numerical value of the first magnetic grid position detected by the fourth detection head at the moment is recorded and used as a relative zero coordinate and stipulates the positive displacement direction;
2) then, the fourth detection head detects the position of the first magnetic grid and outputs a corresponding signal or a corresponding numerical value, the numerical values of the adjacent positions are subtracted, the obtained data is the relative displacement of the fourth detection head and the first magnetic grid in the adjacent two sampling times, and the sum of all the relative displacements after the zero coordinate is set is the displacement S of the first magnetic grid relative to the zero coordinate position at the current moment; namely, the displacement S of the left rod of the rod relative to the left side surface of the first close-contact inspection part; according to the value and the direction of the displacement S, the clearance value of the first sealing inspection part and the corresponding sealing inspection gap can be calculated;
3) meanwhile, according to the calculated displacement S, the distance L1 between the first close-contact inspection part and the first repulsion-separation inspection part, the distance L2 representing the close-contact inspection gap and the repulsion-separation inspection gap of the left rod of the rod, and the characteristic parameter L3 of the repulsion-separation inspection part, the numerical value of the repulsion-separation gap representing the left rod of the rod and the first repulsion-separation inspection part can be calculated;
4) in the same way, the displacement of the right rod of the indicating rod relative to the right side surface of the second close-contact inspection part can be detected, the gap value of the second close-contact inspection part and the corresponding close-contact inspection gap can be calculated according to the numerical value and the direction of the displacement, and then the numerical value of the repulsion gap of the right rod of the indicating rod and the second repulsion gap inspection part is calculated.
And after the indicating rod left rod is set with a zero coordinate according to the position value detected by the fourth detection head, the indicating rod left rod continues to move to the state that the second detection head is separated from the lowest detectable range of the first magnetic grid magnetic field or enters the lowest detectable range of the first magnetic grid magnetic field, and the position value in the magnetic field period detected by the fourth detection head and the indicating rod left rod displacement are recorded and taken as the system characteristic value for indicating the rod left rod.
And after the right rod of the indicating rod is set with zero coordinates according to the position value detected by the first detection head, the indicating rod continues to move until the third detection head is separated from the lowest detectable range of the second magnetic grid magnetic field or enters the lowest detectable range of the second magnetic grid magnetic field, and the position value in the magnetic field period detected by the first detection head and the displacement of the left rod of the indicating rod are recorded and taken as the system characteristic value of the left rod of the indicating rod.
When the second detection head is separated from or enters the lowest detectable range of the first magnetic grid magnetic field in the motion process of the left rod, the deviation between the detected first magnetic grid position value and the displacement value of the first magnetic grid position value relative to the zero coordinate and the recorded system characteristic value is checked to be within a specified range, if the deviation is beyond the specified range, the system has a fault, appointed fault information is output, and if the deviation is not beyond the specified range, the detection data is credible, and a corresponding detection value is output.
And when the third detection head is separated from or enters the lowest detectable range of the second magnetic grid magnetic field in the motion process of the right rod, checking whether the deviation between the detected second magnetic grid position value and the displacement value of the second magnetic grid position value relative to the zero coordinate and the recorded system characteristic value is in a specified range, if the deviation is beyond the specified range, judging that the system has a fault, outputting appointed fault information, and if the deviation is not beyond the specified range, judging that the detection data is credible and outputting a corresponding detection value.
The invention has the advantages that: the linear motion of the indicating rod is detected by utilizing a magnetic grid and a magnetic field induction sensor (a Hall element or a magnetoresistive sensor and the like), so that the non-contact measuring method has high precision, oil pollution interference resistance and relatively low cost; when the detection of the close-contact gap value, the repulsion gap value and the rod displacement in each conversion process is realized, the system can be self-checked in each conversion process, and the detection result error caused by the fault of the detection system is prevented. Compared with the existing method for detecting the position of the linear reciprocating motion part by two detection heads, the method improves the real-time property of detection data and reduces the operation amount by setting a zero coordinate, and in addition, the self-checking of the detection system is carried out in each conversion motion process of the indication rod by the special arrangement of the two detection heads relative to the position of the detected magnetic grid, the credibility of the detection data is judged, and partial system faults are detected.
The invention is further explained below with reference to the drawings of the embodiments.
Description of the drawings:
FIG. 1 is a schematic structural diagram of an embodiment of the present invention; in fig. 1, the close contact inspection notch of the left rod and the repulsion inspection notch of the right rod move to the position matched with the inspection part, and the inspection part on the side falls into the inspection notch.
FIG. 2 is a schematic diagram illustrating the principle of calculating the repulsion-separation gap value according to the present invention.
In the figure: 1, a left rod; 2, a right bar; 3-1, a first magnetic grid; 3-2, a second magnetic grid; 4, a first detection head; 5, a second detection head; 6, a third detection head; 7, a fourth detection head; 8-1, a first close-fitting inspection part; 9-1, a first repulsion inspection part; 8-2, second close-fitting inspection parts; 9-2, second repulsion check part.
Detailed Description
As shown in fig. 1, the present invention relates to a detection device and method for indicating the relative displacement of a rod and a notch value, at least comprising: the device comprises a left rod 1 for indicating a rod, a right rod 2 for indicating the rod, a first close-contact inspection part 8-1, a second close-contact inspection part 8-2, a first repulsion inspection part 9-1 and a second repulsion inspection part 9-2, wherein the first close-contact inspection part 8-1 and the first repulsion inspection part 9-1 correspond to the notch position of the left rod 1 for indicating the rod, the second close-contact inspection part 8-2 and the second repulsion inspection part 9-2 are used for inspecting the notch position of the right rod 2 for indicating the rod, a first magnetic grid 3-1, a second magnetic grid 3-2, a first detection head 4, a second detection head 5, a third detection head 6 and a fourth detection head 7, the first magnetic grid 3-1 is fixed on the surface of the left rod 1 for indicating the rod, the second magnetic grid 3-2 is fixed on the surface of the right rod 2 for indicating the rod, and the first magnetic grid 3-1 and the second magnetic grid 3-2 have the period generated by the magnetic materials which are periodically distributed and the magnetic materials The magnetic field periodic variation direction is parallel to the linear movement direction of the left rod 1 and the right rod 2, the first detection head 4, the third detection head 6, the second detection head 5 and the fourth detection head 7 are composed of magnetic field detection sensors, matching circuits and devices thereof, are matched, combined and fixedly installed and are used for detecting the magnetic fields of the first magnetic grid 3-1 and the second magnetic grid 3-2, the first detection head 4 and the third detection head 6 are in a group and are used for detecting the magnetic field of the second magnetic grid 3-2 but not detecting the magnetic field of the first magnetic grid 3-1, and the second detection head 5 and the fourth detection head 7 are in a group and are used for detecting the magnetic field of the first magnetic grid 3-1 but not detecting the magnetic field of the second magnetic grid 3-2.
The distance between the mutually matched detection head and the magnetic grid in the direction vertical to the movement direction of the magnetic grid meets the requirement of generating a detection signal, namely when the magnetic grid passes through the detection head matched with the magnetic grid, a sensor in the detection head is positioned in an effective magnetic field generated by the corresponding magnetic grid; the detection head in the effective magnetic field outputs a signal or an actual position value matched with a specific position value in a magnetic grid period, the difference value of the position value in the previous moment is a displacement relative to the previous moment, the accumulated displacement from zero coordinates is a coordinate value corresponding to each moment, the fixed installation position of the first detection head 4 is continuously in the effective magnetic field of the second magnetic grid 3-2 in the designed movement range of the right rod 2 of the rod, and the fixed installation position of the fourth detection head 7 is continuously in the effective magnetic field of the first magnetic grid 3-1 in the designed movement range of the left rod 1 of the rod; the fixed installation position of the third detection head 6 is a fixed position which shows that the state change of the magnetic field of the second magnetic grid 3-2 can be detected and the state change of the magnetic field of the second magnetic grid 3-2 can not be detected in the designed movement range of the right rod 2 of the rod. The fixed installation position of the second detection head 5 is a fixed position which shows that the state change of the magnetic field of the first magnetic grid 3-1 can be detected and the magnetic field of the first magnetic grid 3-1 can not be detected in the designed movement range of the left rod 1 of the rod.
After the second detection head 5 and the fourth detection head 7 are fixedly installed, the distance between the magnetic field detection sensors in the second detection head 5 and the fourth detection head 7 is fixed and is relatively fixed with the measurement reference, which indicates that when the left rod 1 moves leftwards (in the drawing plane direction, the following left and right directions both take the drawing plane direction as the reference) to the stop position within the designed movement range, the second detection head 5 and the fourth detection head 7 can both detect the magnetic field of the first magnetic grid 3-1, when the left rod moves rightwards to the stop position, the fourth detection head 7 can detect the magnetic field of the first magnetic grid 3-1, and the third detection head 5 cannot detect the magnetic field of the first magnetic grid 3-1.
After the first detection head 4 and the third detection head 6 are fixedly installed, the distance between the magnetic field detection sensors in the first detection head 4 and the third detection head 6 is fixed, and the magnetic field detection sensors are relatively fixed with the measurement reference; when the right rod 2 moves leftwards to a stop position in a designed movement range, the first detection head 4 can detect the magnetic field of the second magnetic grid 3-2, the third detection head 6 cannot detect the magnetic field of the second magnetic grid 3-2, and when the right rod moves rightwards to the stop position, the first detection head 4 and the third detection head 6 can both detect the magnetic field of the second magnetic grid 3-2.
As shown in fig. 1 and 2, the present invention relates to a detection method for indicating the relative displacement of a rod and a notch value, which comprises the following processes:
after the first close-fit inspection part 8-1 enters the close-fit inspection notch of the left rod 1 of the indicating rod, the position of the left rod 1 of the indicating rod is adjusted, the left rod 1 of the indicating rod moves rightwards until the left side surface of the first close-fit inspection part 8-1 is attached to the left side surface of the close-fit inspection notch, and the position value (specific value in a magnetic field period) of the first magnetic grid 3-1 detected by the fourth detection head 7 at the moment is recorded and used as a relative zero coordinate and stipulates the positive displacement direction.
Then, the fourth detection head 7 detects the position value of the first magnetic grid 3-1, the adjacent position values are subtracted, the obtained data is the relative displacement of the fourth detection head 7 and the first magnetic grid 3-1 in the adjacent two sampling times, and the sum of all the relative displacements after the zero coordinate is set is the displacement S of the first magnetic grid 3-1 relative to the zero coordinate position at the current moment; i.e. the displacement S of the left rod 1 relative to the left side of the first closest inspection part 8-1. The gap value between the left side surface of the first sealing inspection part 8-1 and the left side surface of the corresponding sealing inspection gap can be calculated according to the value and the direction of the displacement S.
Meanwhile, according to the calculated displacement S and the distance L1 between the first close-contact inspection part 8-1 and the first repulsion inspection part 9-1, the distance L2 representing the close-contact inspection gap and the repulsion inspection gap of the left rod 1 of the rod, and the repulsion inspection part characteristic parameter L3 (the horizontal length of the oblique edge of the repulsion inspection part, if the part has no oblique edge, the value is zero), the repulsion gap value representing the left rod 1 and the first repulsion inspection part 9-1 can be calculated, as shown in fig. 2.
In the same way, a displacement of the right rod 2 representing the rod relative to the right side of the second closest inspection part 8-2 can be detected. According to the displacement value and the direction, the gap value of the second close contact inspection part 8-2 and the corresponding close contact inspection gap can be calculated, and further the repulsion gap value of the right rod 2 and the second repulsion inspection part 9-2 is calculated.
In specific application, when the first close contact inspection part 8-1 enters the close contact inspection gap of the indication rod left rod 1, the relative displacement of the second close contact inspection part 8-2 and the indication rod right rod 2 is used for calculating the gap value of the repulsion gap between the second repulsion inspection part 9-2 and the indication rod right rod 2; when the second close contact inspection part 8-2 enters the close contact inspection gap representing the right rod 2 of the rod, the relative displacement of the first close contact inspection part 8-1 and the left rod 1 of the rod is used for calculating the gap value of the first repulsion separation inspection part 9-1 and the repulsion separation gap representing the left rod 1 of the rod.
The setting of the relative zero coordinates is not the only position described in the working method, other characteristic positions can be selected, the detection and calculation of the close contact gap, the repulsion gap and the indication rod displacement are not influenced, and the description in this document is omitted.
The close contact inspection part and the repulsion inspection part on the same left side or right side may be an integral structure or the same part without affecting the application of the present invention, and as in embodiment 1, the first close contact inspection part 8-1 and the second repulsion inspection part 9-2 may be the same part, and the second close contact inspection part 8-2 and the first repulsion inspection part 9-1 may be the same part.
The repulsion checking parts and the repulsion checking whether the sides of the gap are inclined do not affect the application of the invention, only in relation to the design of the switch machine.
Claims (10)
1. A detection device for indicating the relative displacement of a rod and a notch value is characterized in that: at least comprises the following steps: a left rod (1) of a display rod, a right rod (2) of the display rod, a first close-contact inspection part (8-1), a second close-contact inspection part (8-2), a first repulsion inspection part (9-1) and a second repulsion inspection part (9-2), wherein the first close-contact inspection part (8-1) and the first repulsion inspection part (9-1) are used for inspecting the notch position of the left rod (1) of the display rod, the second close-contact inspection part (8-2) and the second repulsion inspection part (9-2) are used for inspecting the notch position of the right rod (2) of the display rod, a first magnetic grid (3-1), a second magnetic grid (3-2), a first detection head (4), a second detection head (5), a third detection head (6) and a fourth detection head (7), the first magnetic grid (3-1) is fixed on the surface of the left rod (1) of the display rod, the second magnetic grid (3-2) is fixed on the surface of the indication rod right rod (2), the first magnetic grid (3-1) and the second magnetic grid (3-2) are provided with periodic magnetic field distribution generated by magnetic materials and magnetic materials which are periodically distributed, the periodic change direction of the magnetic field is parallel to the linear motion direction of the indication rod left rod (1) and the indication rod right rod (2), and the first detection head (4), the second detection head (6), the third detection head (5) and the fourth detection head (7) are composed of magnetic field detection sensors and matching circuits thereof and are used for detecting the magnetic fields of the first magnetic grid (3-1) and the second magnetic grid (3-2).
2. The detecting device for indicating the relative displacement of the rod and the numerical value of the notch as set forth in claim 1, wherein: the first detection head (4) and the third detection head (6) are in a group, are distributed along the reciprocating motion direction of the right rod (2) of the indication rod and are fixedly installed, and are used for detecting the magnetic field of the second magnetic grid (3-2) on the right rod (2) of the indication rod; the second detection head (5) and the fourth detection head (7) are a group, are distributed along the reciprocating motion direction of the left rod (1) of the indication rod and are fixedly installed, and are used for detecting the magnetic field of the first magnetic grid (3-1) on the left rod (1) of the indication rod.
3. A detecting device for indicating a relative rod displacement and a notch value according to claim 2, wherein: the right rod (2) of the indicating rod has a movement travel range, in the range, the first detecting head (4) is positioned in the lowest detectable range of the magnetic field of the second magnetic grid (3-2), and when the right rod (2) of the indicating rod moves to a fixed position relative to the first detecting head (4), the third detecting head (6) is separated from the lowest detectable range of the magnetic field of the second magnetic grid (3-2) or enters the lowest detectable range of the magnetic field of the second magnetic grid (3-2); the indication rod left rod (1) has a movement travel range, in which the fourth detection head (7) is positioned in the lowest detectable range of the magnetic field of the first magnetic grid (3-1), and when the indication rod left rod (1) moves to a fixed position relative to the fourth detection head (7), the second detection head (5) is separated from the lowest detectable range of the magnetic field of the first magnetic grid (3-1) or enters the lowest detectable range of the magnetic field of the first magnetic grid (3-1).
4. A detecting device for indicating a relative rod displacement and a notch value according to claim 3, wherein: the lowest detectable range of the magnetic field is that the hardware of the detection head and the corresponding software can identify the magnetic field and calculate the detection sensitivity value of the periodic position of the corresponding magnetic field.
5. The detecting device for indicating the relative displacement of the rod and the numerical value of the notch as set forth in claim 1, wherein: the magnetic field detection sensor includes, but is not limited to, a hall sensor, a magnetoresistive sensor.
6. A detection method for representing the relative displacement of a rod and a notch value at least comprises the following steps:
1) after the first close-fit inspection part (8-1) enters the close-fit inspection notch of the left rod (1) of the indicating rod, adjusting the position of the left rod (1) of the indicating rod to enable the left rod (1) of the indicating rod to move rightwards until the left side surface of the first close-fit inspection part (8-1) is attached to the left side surface of the close-fit inspection notch, and recording the position value of the first magnetic grid (3-1) detected by the fourth detection head (7) at the moment, wherein the position value is used as a relative zero coordinate and defines a positive displacement direction;
2) then, the fourth detection head (7) detects the position of the first magnetic grid (3-1) and outputs a corresponding signal or a corresponding numerical value, the adjacent position numerical values are subtracted, the obtained data is the relative displacement of the fourth detection head (7) and the first magnetic grid (3-1) in two adjacent sampling times, and the sum of all the relative displacements after the zero coordinate is set is the displacement S of the first magnetic grid (3-1) relative to the zero coordinate position at the current moment; namely, the displacement S of the left rod (1) of the rod relative to the left side surface of the first close-contact inspection part (8-1); according to the value and the direction of the displacement S, the clearance value of the first sealing inspection part (8-1) and the corresponding sealing inspection gap can be calculated;
3) meanwhile, according to the calculated displacement S and the distance L1 between the first close-contact inspection part (8-1) and the first repulsion inspection part (9-1), the distance L2 between the close-contact inspection gap and the repulsion inspection gap of the left rod (1) of the rod and the characteristic parameter L3 of the repulsion inspection part, the repulsion gap value between the left rod (1) of the rod and the first repulsion inspection part (9-1) can be calculated;
4) in the same way, the displacement of the right rod (2) of the indicating rod relative to the right side surface of the second close-contact inspection part (8-2) can be detected, the gap value of the second close-contact inspection part (8-2) and the corresponding close-contact inspection gap can be calculated according to the numerical value and the direction of the displacement, and the value of the repulsion gap between the right rod (2) of the indicating rod and the second repulsion inspection part (9-2) can be further calculated.
7. The method as claimed in claim 6, wherein the detecting means comprises: the step 2) also comprises the following steps:
and after the left rod (1) of the indicating rod is set to be a zero coordinate according to the position value detected by the fourth detection head (7), the indicating rod continues to move until the second detection head (5) is out of the lowest detectable range of the magnetic field of the first magnetic grid (3-1) or enters the lowest detectable range of the magnetic field of the first magnetic grid (3-1), and the position value detected by the fourth detection head (7) in the magnetic field period and the displacement of the left rod (1) of the indicating rod are recorded and taken as the system characteristic value of the left rod (1) of the indicating rod.
8. The method as claimed in claim 6, wherein the detecting means comprises: the step 4) also comprises the following steps:
after the right rod (2) of the indicating rod is set to be a zero coordinate according to the position value detected by the first detecting head (4), the indicating rod continues to move until the third detecting head (6) is out of the lowest detectable range of the magnetic field of the second magnetic grid (3-2) or enters the lowest detectable range of the magnetic field of the second magnetic grid (3-2), and the position value in the magnetic field period detected by the first detecting head (4) and the displacement of the left rod (2) of the indicating rod are recorded and taken as the system characteristic value of the left rod (2) of the indicating rod.
9. The method as claimed in claim 6, wherein the detecting means comprises: the step 2) also comprises the following steps:
when the second detection head (5) is separated from or enters the lowest detectable range of the magnetic field of the first magnetic grid (3-1) in the movement process of the left rod (1), whether the deviation between the detected position value of the first magnetic grid (3-1) and the displacement value of the position value relative to the zero coordinate and the recorded system characteristic value is in a specified range or not is checked, if the deviation is beyond the specified range, the system has a fault, appointed fault information is output, and if the deviation is not beyond the specified range, the detection data is credible, and a corresponding detection value is output.
10. The method as claimed in claim 6, wherein the detecting means comprises: the step 4) also comprises the following steps:
when the third detection head (6) is out of or enters the lowest detectable range of the magnetic field of the second magnetic grid (3-2) in the movement process of the right rod (2), whether the deviation between the detected position value of the second magnetic grid (3-2) and the displacement value of the position value relative to the zero coordinate and the recorded system characteristic value is in a specified range is checked, if the deviation is out of the specified range, the system has a fault, appointed fault information is output, and if the deviation is not out of the specified range, the detection data is credible, and a corresponding detection value is output.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN113970354A (en) * | 2021-09-24 | 2022-01-25 | 西安铁路信号有限责任公司 | Method for controlling normal start and stop of push rod of test board of seal inspection device |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113970354A (en) * | 2021-09-24 | 2022-01-25 | 西安铁路信号有限责任公司 | Method for controlling normal start and stop of push rod of test board of seal inspection device |
| CN113970354B (en) * | 2021-09-24 | 2022-08-09 | 西安铁路信号有限责任公司 | Method for controlling normal start and stop of push rod of test board of seal inspection device |
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