Auxiliary detection device and detection method for monitoring precision of gap camera

Abstract

The invention discloses an auxiliary detection device and detection method for monitoring precision of a gap camera. The device comprises a device base; a sliding table base is arranged at the rear end of the top of the device base; the servo motor is arranged at the left end of the top of the sliding table base; an output shaft on the right side of the servo motor is connected with the left end of the ball screw through a coupler; a lead screw nut is arranged on the ball screw; a sliding seat is arranged on the lead screw nut; mounting seats are arranged at the front ends of the sliding seats; the front end of the mounting seat protrudes out of the front end of the sliding seat; a gap camera is arranged at the front end of the mounting seat in a forward protruding manner; an indication rod is arranged at the top front end of the device base; the top of the indication rod is provided with a notch; and the notch camera is positioned above the notch. The application of the invention is beneficial to accurately and reliably detecting and acquiring the monitoring precision of the notched camera, avoids the investment of notched cameras with poor monitoring precision, and ensures the safety of railway transportation when being applied to an actual working scene.

Description

Technical Field

[0001] The present invention relates to the field of rail transit technology, and in particular to an auxiliary detection device and a detection method for monitoring accuracy of a gap camera. Background Art

[0002] A switch machine is an important signal infrastructure equipment used to reliably switch the position of switches, change the direction of switch opening, lock the switch point rail, and reflect the position of switches. It can well ensure driving safety, improve transportation efficiency, and improve the labor intensity of drivers.

[0003] The function of the switch machine is to switch and lock the point rail (heart rail), change the opening direction of the turnout, and reflect the position status of the point rail (heart rail) through the contact point. The switch machine is one of the important equipment to ensure the safety of railway transportation. If the switch machine fails to switch the turnout into place normally, it will affect the normal operation order of the train. In serious cases, it may cause a train collision or derailment. Therefore, the switch machine is an electric traction equipment for railway turnouts, and its working reliability is related to the safety of railway transportation.

[0004] For switch machines, the switch gap (i.e. the switch indication gap) is used to reflect the close contact status and position of the switch point rail (heart rail) and the base rail (wing rail). If the point rail and the base rail are not in close contact, it may cause serious consequences such as train derailment. Therefore, switch gap monitoring is of great significance and has always been an important part of maintenance for electricians. Therefore, it is necessary to monitor the switch gap in real time.

[0005] With the continuous increase of high-speed and high-density railway sections, in order to ensure driving safety, the requirements for the quality of turnout operation and state stability are becoming higher and higher. The gap monitoring system of the switch machine can monitor the turnout status in real time, thereby ensuring the normal conversion of the turnout.

[0006] The gap monitoring system of the switch machine is the basis for realizing the maintenance of the turnout switching equipment and is also an important tool for signal maintenance and management. The task of the gap monitoring system is: for the gap (groove) of the indicating rod that has fallen into the inspection column, monitor the distance between one side edge of the gap of the indicating rod and the edge of the inspection column it falls into (that is, the gap gap width, also called the gap width, the gap gap is the gap between the edge of the gap in the indicating rod and the edge of the inspection column).

[0007] At present, the basic implementation method of the gap monitoring system of the switch machine is: by installing an image acquisition device (specifically a gap camera) inside the switch machine to capture the image of the gap, real-time video monitoring of the gap of the switch machine is achieved.

[0008] Among them, the gap camera is an important equipment of the gap monitoring system. The monitoring accuracy of the gap camera directly affects and determines the monitoring accuracy of the gap gap by the gap monitoring system. Therefore, it is necessary to test the monitoring accuracy of the gap camera to avoid the gap cameras with poor monitoring accuracy being put into use in actual work scenarios to ensure the safety of railway transportation.

[0009] It should be noted that the switch gap refers to the groove on the indicator rod of the switch machine for the inspection column to fall into. The gap camera is a camera used to shoot the gap gap, which is the camera in the gap monitoring system. The gap gap refers to the gap between the edge of the inspection column and the edge of the groove (i.e., the gap) of the indicator rod after the inspection column falls into the groove on the indicator rod. The gap gap width is the distance of the gap. When the switch machine is operating normally, the position of the inspection column is fixed relative to the gap camera, the indicator rod changes with respect to the gap camera, and thus the position of the gap on the indicator rod also changes with respect to the gap camera. Summary of the invention

[0010] The purpose of the present invention is to provide an auxiliary detection device and detection method for the monitoring accuracy of a gap camera in view of the technical defects existing in the prior art.

[0011] To this end, the present invention provides an auxiliary detection device for monitoring accuracy of a gap camera, comprising a laterally distributed device base;

[0012] A horizontally distributed slide base is provided at the top rear end of the device base;

[0013] A servo motor is provided at the top left end of the slide base;

[0014] The output shaft on the right side of the servo motor is connected to the left end of the ball screw through a coupling;

[0015] A screw nut is provided on the ball screw;

[0016] A horizontally distributed slide is arranged on the screw nut;

[0017] A mounting seat is fixedly arranged at the front end of the sliding seat;

[0018] The front end of the mounting seat protrudes from the front end of the sliding seat;

[0019] A notch camera is provided at the front end of the mounting base so as to protrude forward;

[0020] The top front end of the device base is provided with a laterally distributed indicating rod;

[0021] Indicates that the top of the rod is provided with a notch;

[0022] The lens of the notch camera is set downwards and located above the notch.

[0023] In addition, the present invention also provides a method for detecting the monitoring accuracy of a gap camera based on the auxiliary detection device for the monitoring accuracy of the gap camera as described above, which comprises the following steps:

[0024] Step S1, in the notch gap captured by the notch camera, the edge line B of the notch is simulated and calibrated as the edge simulation calibration line C of the inspection column when the inspection column is close to the edge of the notch;

[0025] Step S2, controlling the notch camera to move horizontally to the left by a servo motor, so as to simulate the state that the rod moves to the right, and in the notch gap shooting image obtained by the notch camera, the edge line B of the notch on the rod moves to the right, and the edge line B of the notch is away from the column edge calibration line C of the inspection column, that is, relative movement occurs, and then according to the notch gap shooting image, the width value t of the notch gap is obtained;

[0026] Step S3, when the notch camera moves, obtaining the rotation angle α of the servo motor;

[0027] Step S4, obtaining the monitoring accuracy ε of the notch camera according to the width value t of the notch gap obtained in step S2 and the rotation angle α of the servo motor 1 obtained in step S3, as well as the preset calculation formula for the moving distance of the notch camera and the calculation formula for the monitoring accuracy of the notch camera.

[0028] It can be seen from the technical solution provided by the present invention that, compared with the prior art, the present invention provides an auxiliary detection device and detection method for the monitoring accuracy of a gap camera, which is scientifically designed. By installing the gap camera on the auxiliary detection device for the monitoring accuracy of the gap camera provided by the present invention, it is beneficial for the staff to accurately and reliably detect and obtain the monitoring accuracy of the gap camera, avoid the use of gap cameras with poor monitoring accuracy in actual work scenarios, and ensure the safety of railway transportation, which has great practical significance.

[0029] The invention is a verification tool for the monitoring accuracy of a notch camera.

[0030] It should be noted that after the switch machine is in place, the change in the gap is caused by the relative displacement of the edge of the gap (i.e., the groove on the indicating rod) relative to the edge of the inspection column, while the gap camera does not have a relative displacement relative to the inspection column, and the position of the inspection column is fixed relative to the gap camera. Therefore, the present invention converts the measurement of the gap width into: measuring the relative displacement of the edge of the gap (i.e., the groove on the indicating rod) relative to the camera. Therefore, the change in the gap can be simulated by moving the camera and fixing the indicating rod (i.e., simulating the displacement of the edge of the gap on the indicating rod relative to the edge of the inspection column). BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 An auxiliary detection device for monitoring accuracy of a notch camera provided by the present invention, a top view when the notch camera is not installed;

[0032] Figure 2 An auxiliary detection device for monitoring accuracy of a notch camera provided by the present invention, a top view when the notch camera is installed;

[0033] Figure 3 A schematic diagram showing the monitoring principle of the notch gap on the rod;

[0034] Figure 4 It is a schematic diagram of the shooting situation of the notch on the indicating rod when the notch camera is not moving (i.e. in the initial state);

[0035] Figure 5 It is a schematic diagram of the notch camera photographing the notch on the pole when it moves a certain distance. DETAILED DESCRIPTION

[0036] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0037] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0038] In the description of this patent, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", and "set" should be understood in a broad sense, for example, it can be fixedly connected or set, or it can be detachably connected or set, or connected or set in one piece. For ordinary technicians in this field, the specific meanings of the above terms in this patent can be understood according to specific circumstances.

[0039] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0040] Example 1

[0041] See also Figures 1 to 5 , the present invention provides an auxiliary detection device for monitoring accuracy of a gap camera, comprising a device base 10 distributed laterally;

[0042] At the top rear end of the device base 10, a laterally distributed slide base 9 is provided;

[0043] A servo motor 1 is provided at the top left end of the slide base 9;

[0044] The output shaft on the right side of the servo motor 1 is connected to the left end of the ball screw 8 through the coupling 3;

[0045] The ball screw 8 is provided with a screw nut 5;

[0046] A horizontally distributed slide 4 is provided on the screw nut 5;

[0047] A mounting seat 15 is fixedly provided at the front end of the slide seat 4;

[0048] The front end of the mounting seat 15 protrudes from the front end of the slide seat 4;

[0049] A notch camera 20 (i.e., an image acquisition camera) is provided at the front end of the mounting seat 15 so as to protrude forward;

[0050] At the top front end of the device base 10, a laterally distributed indicating rod 14 is provided (it can be an indicating rod of the same specification and size as the original indicating rod on the switch machine);

[0051] See also Figure 3 As shown, the top of the rod 14 is provided with a notch 1401 (i.e., a groove);

[0052] The lens 2001 of the notch camera 20 is arranged downward and is located above the notch 1401 .

[0053] It should be noted that the screw nut 5 is sleeved on the ball screw 8, and the screw nut 5 and the ball screw 8 together form a ball screw pair. The ball screw pair is a spiral transmission element with steel balls as rolling bodies between the screw and the nut. It can convert the rotational motion of the ball screw into the linear motion of the screw nut. When the ball screw is used as the active body, the screw nut will be converted into linear motion according to the lead of the corresponding specification as the rotation angle of the screw, and the passive workpiece (such as the slide 4) can be connected to the screw nut through the nut seat, thereby realizing the corresponding linear motion. The working principle and related structural design of the ball screw pair are common knowledge in the prior art and will not be repeated here.

[0054] In the present invention, it should be noted that, see Figure 3 As shown, the notch 1401 (i.e., groove) of the rod 14 can be used to fall into the inspection post 1400 (which can be an inspection post of the same size as the original inspection post on the switch machine);

[0055] For the switch machine, when the switch machine moves to the right position (i.e., the switch switching operation is in place), the inspection column 1400 of the switch machine falls down and falls into the notch (groove) 1401 of the indicating rod 14, and the gap between the edge of the inspection column 1400 and the edge of the notch is the notch gap. The present invention can simulate the notch gap of the switch machine, and the image of the notch gap is captured and obtained by the notch camera 20.

[0056] In the present invention, in a specific implementation, a second side plate 7 distributed laterally is vertically arranged on both sides of the top and the rear of the slide base 9;

[0057] The two second side plates 7 are arranged parallel to each other;

[0058] A set of laterally distributed linear guide rails 6 are respectively provided on opposite sides of the two second side plates 7;

[0059] The slide seat 4 is connected with the linear guide rail 6 in a sliding manner;

[0060] It should be noted that when the slide 4 moves horizontally to the left and right, it moves linearly along the linear guide rail 6 .

[0061] In a specific implementation, the bottom of the slide seat 4 is provided with a slider at a position corresponding to each linear guide rail 6;

[0062] The slider is connected with the linear guide rail 6 in a sliding manner;

[0063] Furthermore, the top of the linear guide rail 6 has a guide groove (groove) distributed laterally;

[0064] The slider is slidably connected with the guide slot (groove);

[0065] The shape and size of the sliding block and the guide groove (recess) correspond to each other.

[0066] In the present invention, the specific implementation is as follows: Figure 1 , Figure 2 As shown, the top front end of the device base 10 is provided with an inner card plate 13 and an outer card plate 12 which are distributed laterally;

[0067] The outer card plate 12 is located in front of the inner card plate 13 and is arranged parallel to the inner card plate 13;

[0068] A display rod 14 is provided on the front side of the inner clamping plate 13 .

[0069] In specific implementation, the front side of the inner card plate 13 is tightly fitted with the rear side of the indicating rod 14;

[0070] The front side of the rod 14 is shown, which is connected to the outer clamping plate 12 via a fifth fastener 19 (such as a screw).

[0071] It should be noted that one side of the rod 14 is in close contact with the inner clamping plate 13 , and the other side is fixed by a fifth fastener 19 passing through the outer clamping plate 12 .

[0072] Furthermore, the outer clamping plate 12 is provided with a plurality of threaded holes extending longitudinally therethrough at positions corresponding to the indicating rods 14;

[0073] The fifth fastener 19 passes longitudinally through the threaded hole on the outer clamping plate 12 and is threadedly connected with the threaded hole;

[0074] The rear end portion of the fifth fastening member 19 abuts against (ie, is in close contact with) the front side of the indicating rod 14 .

[0075] In the present invention, in specific implementation, a first side plate 2 is vertically arranged at the top left end of the slide base 9;

[0076] A servo motor 1 is arranged on the first side plate 2;

[0077] In specific implementation, a first side plate through hole is transversely provided on the first side plate 2;

[0078] The right side wall of the main housing of the servo motor 1 is arranged on the left side wall of the first side plate 2;

[0079] The output shaft on the right side of the servo motor 1 is connected to the coupling 3 after passing through the through hole of the first side plate in a transverse direction.

[0080] In the present invention, in a specific implementation, the left and right ends of the top of the slide base 9 are respectively provided with a first screw support plate 22 and a second screw support plate 23;

[0081] The first screw support plate 22 and the second screw support plate 23 are arranged symmetrically.

[0082] The first screw support plate 22 and the second screw support plate 23 are respectively provided with a first bearing mounting hole and a second bearing mounting hole at positions corresponding to the ball screw 8;

[0083] A first bearing and a second bearing are respectively arranged in the first bearing mounting hole and the second bearing mounting hole;

[0084] The left and right ends of the ball screw 8 are connected to the inner ring of the first bearing and the inner ring of the second bearing respectively.

[0085] Therefore, based on the above design, the ball screw 8 can rotate smoothly under the drive of an external force (such as the rotational driving force provided by the servo motor 1).

[0086] In the present invention, in a specific implementation, the slide seat 4 is fixed to the top of the screw nut 5 by a plurality of first fasteners 16 (such as screws).

[0087] The mounting seat 15 is fixed on the slide seat 4 by a plurality of third fasteners 18 (such as screws).

[0088] In the present invention, in a specific implementation, the rear end of the shell of the notch camera 20 is fixed to the mounting base 15 by a plurality of sixth fasteners 21 (such as screws).

[0089] In the present invention, in a specific implementation, the linear guide rail 6 is fixed to the second side plate 7 by a second fastener 17 (such as a screw);

[0090] In the present invention, in a specific implementation, the notch camera 20 is fixed to the mounting base 15 by a sixth fastener 21 (such as a screw).

[0091] In the present invention, in a specific implementation, the slide base 9 is fixed to the device base 10 by a seventh fastener (such as a screw).

[0092] The following is an explanation of the existing gap monitoring system on the switch machine. The working principle of implementing gap monitoring is as follows:

[0093] See also Figure 3 As shown, for the existing switch gap monitoring system, the lens 2001 of the gap camera is set above the gap gap of the indicator rod 14. When the switch indicator rod moves into place, the inspection column falls into the gap of the indicator rod. At this time, the gap gap is photographed by the gap camera, and the width value t of the gap gap can be obtained based on the photographed image.

[0094] Considering that the position where the inspection post 1400 is required to fall is fixed (i.e., it falls vertically in a vertical plane), and when the switch machine indicating rod moves into place, the specific position where the inspection post 1400 actually falls in the notch of the indicating rod is not fixed. Therefore, a fixed position (the position of the edge of the inspection post) can be directly calibrated in the image captured by the camera, and then the position of the edge of the notch 1401 can be obtained through the image, and finally photographed and processed, and the image processing method of the switch machine notch image processing that has been adopted in the original notch monitoring system of the switch machine, which is mature in the existing technology and has been widely used, can be used for image processing to obtain the width value t of the notch gap (i.e., the gap between the edge of the inspection post and the edge of the notch of the indicating rod after the inspection post falls into the groove on the indicating rod).

[0095] It should be noted that in the present invention, through the existing gap monitoring system, the width value t of the gap gap can be obtained according to the image taken by the gap camera. For example, the gap monitoring system can be the JQ1 switch gap monitoring system produced by Tianjin Railway Signal Co., Ltd.

[0096] In order to more clearly understand the technical solution of the present invention, the working principle of the present invention for simulating the implementation of gap monitoring is described below.

[0097] Figure 4 It is a schematic diagram of the photographing situation of the notch on the indicating rod when the notch camera 20 is not moving (i.e. in the initial state); Figure 5 It is a schematic diagram showing the shooting situation of the notch on the indicating rod when the notch camera 20 moves a certain distance.

[0098] See also Figure 4 , Figure 5 As shown, the lens 2001 of the notch camera 20 is aimed at the area to be monitored, and the shooting range of the notch gap image of the notch camera 20 is A, where A is the rectangular area pointed to in the figure; it represents the notch 1401 on the rod 14, which is the distribution area between the straight line B1 and the straight line B.

[0099] For the present invention, in the notch gap captured by the notch camera 20, the edge line B of the notch 1401 (i.e., the edge of the groove body) is simulated and calibrated in advance as the column edge simulation calibration line C (a virtual line) of the column edge of the inspection column 1400 when the inspection column 1400 is close to the edge of the notch 1401.

[0100] It should be noted that when the inspection column 1400 is close to the edge of the notch 1401, that is, when the gap width is 0, the edge of the inspection column 1400 is close to the edge of the notch 1401 and the two coincide with each other, forming the same straight line, that is, at this time, the edge line B of the notch 1401 coincides with the simulated calibration line C of the column edge of the inspection column 1400. Figure 4The edge line B of the notch 1401 in the figure can be used to simulate the edge line of the column 1400 when the inspection column 1400 is close to the edge of the notch 1401, that is, as a calibration line of the column edge of the inspection column 1400.

[0101] Figure 4 The state can simulate the state where the inspection column 1400 is close to the edge of the notch 1401, that is, the state where the width of the notch gap is 0.

[0102] See also Figure 5 As shown, in Figure 4 On the basis of the above, the notch camera 20 is moved horizontally to the left along the direction of the indicating rod, so as to simulate the state that the indicating rod moves to the right, and in the notch gap shooting image obtained by the notch camera 20, the edge line B of the notch 1401 on the indicating rod (that is, the groove edge of the groove) moves to the right. At this time, the edge line B of the notch 1401 is away from the column edge calibration line C of the inspection column 1400, and because the inspection column is fixed relative to the notch camera, the position of the calibration line C in the shooting range A of the notch camera is also unchanged, as shown in FIG. Figure 5 As shown, it is possible to simulate the relative displacement between the edge of the notch on the rod 14 and the edge of the column of the inspection column, and then simulate the change in the notch gap width (the distance between the column edge calibration line of the inspection column 1400 and the notch edge line).

[0103] For the present invention, since there is no relative displacement between the inspection column and the notch camera, the relative positions of the two are fixed, and there is a relative displacement of the notch edge relative to the camera. Therefore, the movement of the notch on the indicating rod can be replaced by moving the notch camera, that is, the relative displacement between the notch camera and the notch edge on the indicating rod replaces the relative displacement between the notch edge of the indicating rod and the edge of the inspection column.

[0104] For this purpose, see Figure 4 , Figure 5 As shown, the present invention uses a notch camera to calibrate a fixed position in advance (i.e., edge line B of the notch 1401 when the notch gap width is 0) to simulate the position of the calibration indicating rod (i.e., the simulated calibration line C of the column edge of the inspection column 1400), and then moves the notch camera so that in the notch gap captured image obtained by the notch camera 20, the notch edge (i.e., edge line B of the notch 1401) moves relative to the fixed calibration position (simulated calibration line C) to simulate the relative displacement between the notch edge and the inspection column edge, thereby indirectly simulating notch gaps of different widths t.

[0105] The following describes the working principle of the present invention for realizing the movement of the notch camera and the calculation principle of the monitoring accuracy of the notch camera.

[0106] The drive and power supply cables of the servo motor 1 are connected to the drive module of the servo motor 1. The rotation of the servo motor 1 is controlled by the drive module. The servo motor 1 drives the coupling 3 to rotate, and the coupling 3 drives the ball screw 8 to rotate. The ball screw 8 drives the screw nut 5 to move on the screw, and then drives the slide 4, the mounting bracket 15 and the notch camera 20 to move on the linear guide rail.

[0107] The driving module of the servo motor can obtain the rotation angle α of the servo motor through the servo motor. The lead of the screw is known to be d (the lead of the screw refers to the moving distance on the nut shaft corresponding to the unit pitch on the screw shaft, which is a pre-known parameter). Then, the moving distance L of the notch camera can be obtained through the calculation formula of the moving distance of the notch camera.

[0108] The calculation formula for the moving distance of the notch camera is as follows:

[0109] L = d·(α / 360), formula (1);

[0110] In formula (1), d is the lead of the screw;

[0111] α is the rotation angle of the servo motor.

[0112] Therefore, for the present invention, based on the above method, the moving distance L of the gap camera 20 can be calculated, and then the width value t of the gap gap obtained by processing the gap gap image taken by the gap camera based on the original gap monitoring system of the switch machine can be used. The monitoring accuracy ε of the gap camera can be obtained through the monitoring accuracy calculation formula of the gap camera.

[0113] The calculation formula of the monitoring accuracy ε of the notch camera is as follows:

[0114] ε=Lt,Formula (2);

[0115] L is the moving distance of the notch camera;

[0116] t is the gap width value obtained by the original gap monitoring system of the switch machine based on the gap image taken by the gap camera (that is, the gap width value obtained according to the gap image by adopting the existing and original measurement method of the gap monitoring system of the switch machine).

[0117] Example 2

[0118] In the present invention, the auxiliary detection device for monitoring accuracy of a gap camera provided by the present invention also includes an industrial control computer;

[0119] The industrial control computer is connected to the driving module of the servo motor 1 and is used to collect the rotation angle α of the servo motor, and then calculate the monitoring accuracy ε of the notch camera according to the calculation formula of the moving distance of the notch camera and the calculation formula of the monitoring accuracy of the notch camera.

[0120] Example 3

[0121] In the present invention, the auxiliary detection device for monitoring accuracy of a notch camera provided by the present invention further includes an industrial control computer (specifically, it may be an industrial control touch screen);

[0122] The industrial control computer is connected to the two angle encoders 302 on the two device units (can be wirelessly connected) to collect the angle α of the servo motor rotation and display it on the matching display screen. At this time, the staff can calculate the monitoring accuracy ε of the gap camera by combining the above calculation formula (1) and formula (2).

[0123] Based on the auxiliary detection device for monitoring accuracy of a gap camera provided by the present invention, the present invention also provides a method for detecting monitoring accuracy of a gap camera based on the auxiliary detection device for monitoring accuracy of a gap camera, which comprises the following steps:

[0124] Step S1, in the notch gap captured by the notch camera 20, the edge line B of the notch 1401 (i.e., the groove body edge of the groove) is simulated and calibrated as the column edge simulation calibration line C (a virtual line) of the column body edge of the inspection column 1400 when the inspection column 1400 is close to the edge of the notch 1401;

[0125] Step S2, controlling the gap camera 20 to move horizontally to the left by the servo motor 1, so as to simulate the state that the indicating rod moves to the right, and in the gap gap shooting image obtained by the gap camera 20, the edge line B of the gap 1401 on the indicating rod moves to the right (at this time, since the inspection column is fixed relative to the gap camera, the position of the calibration line C in the shooting range A of the gap camera is also unchanged), and the edge line B of the gap 1401 is away from the column edge calibration line C of the inspection column 1400 (that is, relative movement occurs), and then according to the gap gap shooting image, the width value t of the gap gap is obtained (the specific acquisition method is the method used by the existing switch gap monitoring system, which will not be repeated here);

[0126] Step S3, when the notch camera 20 moves, obtaining the rotation angle α of the servo motor 1;

[0127] Step S4, obtaining the monitoring accuracy ε of the notch camera 20 according to the width value t of the notch gap obtained in step S2 and the rotation angle α of the servo motor 1 obtained in step S3, as well as the preset calculation formula for the moving distance of the notch camera and the calculation formula for the monitoring accuracy of the notch camera.

[0128] In step S4, in specific implementation, the calculation formula of the moving distance of the notch camera is as follows:

[0129] L = d·(α / 360), formula (1);

[0130] In formula (1), d is the lead of the screw;

[0131] α is the rotation angle of the servo motor.

[0132] In step S4, in specific implementation, the calculation formula of the monitoring accuracy ε of the notch camera is as follows:

[0133] ε=Lt,Formula (2);

[0134] L is the moving distance of the notch camera;

[0135] t is the gap width value obtained by the original gap monitoring system of the switch machine based on the gap image taken by the gap camera (that is, the gap width value obtained according to the gap image by adopting the existing and original measurement method of the gap monitoring system of the switch machine).

[0136] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principle of the present invention. These improvements and modifications should also be regarded as the scope of protection of the present invention.

Claims

1. An auxiliary detection device for monitoring accuracy of a gap camera, characterized in that: It includes a laterally distributed device base (10); A sliding platform base (9) distributed laterally is provided at the top rear end of the device base (10); A servo motor (1) is provided at the top left end of the slide base (9); The output shaft on the right side of the servo motor (1) is connected to the left end of the ball screw (8) through a coupling (3); A ball screw nut (5) is arranged on the ball screw (8); A horizontally distributed slide seat (4) is arranged on the screw nut (5); A mounting seat (15) is fixedly arranged at the front end of the slide seat (4); The front end of the mounting seat (15) protrudes from the front end of the sliding seat (4); A notch camera (20) is provided at the front end of the mounting seat (15) so as to protrude forward; A transversely distributed indicating rod (14) is provided at the top front end of the device base (10); The top of the rod (14) is provided with a notch (1401); The lens (2001) of the notch camera (20) is arranged downward and is located above the notch (1401).

2. The auxiliary detection device for monitoring accuracy of the gap camera according to claim 1, characterized in that: A second side plate (7) distributed laterally is vertically arranged on both the front and rear sides of the top of the slide base (9); The two second side plates (7) are arranged parallel to each other; A set of laterally distributed linear guide rails (6) are respectively provided on opposite sides of the two second side plates (7); The slide seat (4) is connected to the linear guide rail (6) in a sliding manner.

3. The auxiliary detection device for monitoring accuracy of the gap camera according to claim 2, characterized in that: The bottom of the slide seat (4) is provided with a sliding block at a location corresponding to each linear guide rail (6); The slide block is connected with the linear guide rail (6) in a sliding manner.

4. The auxiliary detection device for monitoring accuracy of a gap camera as claimed in claim 1, characterized in that: The top front end of the device base (10) is provided with an inner card plate (13) and an outer card plate (12) which are distributed laterally; The outer card plate (12) is located directly in front of the inner card plate (13) and is arranged parallel to the inner card plate (13); The front side of the inner clamping plate (13) is provided with a display rod (14).

5. The auxiliary detection device for monitoring accuracy of a gap camera as claimed in claim 1, characterized in that: The front side of the inner card plate (13) is closely fitted with the rear side of the indicating rod (14); The front side of the rod (14) is connected to the outer clamping plate (12) through the fifth fastener (19).

6. The auxiliary detection device for monitoring accuracy of a gap camera as claimed in claim 6, characterized in that: The outer clamping plate (12) is provided with a plurality of threaded holes extending longitudinally and penetratingly at a position corresponding to the indicating rod (14); The fifth fastener (19) passes longitudinally through the threaded hole on the outer clamping plate (12) and is threadedly connected to the threaded hole; The rear end of the fifth fastener (19) abuts against the front side of the indicating rod (14).

7. The auxiliary detection device for monitoring accuracy of a gap camera as claimed in claim 1, characterized in that: A first side plate (2) is vertically arranged at the left end of the top of the slide base (9); A first side plate through hole is provided on the first side plate (2) in a transverse direction; The right side wall of the main housing of the servo motor (1) is arranged on the left side wall of the first side plate (2); The output shaft on the right side of the servo motor (1) is connected to the coupling (3) after passing through the through hole of the first side plate in the transverse direction.

8. The auxiliary detection device for monitoring accuracy of a notch camera according to any one of claims 1 to 7, characterized in that: A first screw support plate (22) and a second screw support plate (23) are respectively provided at the left and right ends of the top of the slide base (9); The first screw support plate (22) and the second screw support plate (23) are arranged symmetrically. The first screw support plate (22) and the second screw support plate (23) are respectively provided with a first bearing mounting hole and a second bearing mounting hole at positions corresponding to the ball screw (8); A first bearing and a second bearing are respectively arranged in the first bearing mounting hole and the second bearing mounting hole; The left and right ends of the ball screw (8) are connected to the inner ring of the first bearing and the inner ring of the second bearing respectively.

9. A method for detecting the monitoring accuracy of a gap camera based on the auxiliary detection device for monitoring accuracy of a gap camera according to any one of claims 1 to 8, characterized in that: The following steps are involved: Step S1, in the notch gap captured by the notch camera (20), the edge line B of the notch (1401) is simulated and calibrated as the column edge simulated calibration line C of the inspection column (1400) when the inspection column (1400) is close to the edge of the notch (1401); Step S2, controlling the notch camera 20 to move horizontally to the left by the servo motor 1, so as to simulate the state in which the rod moves to the right, and in the notch gap captured by the notch camera (20), the edge line B of the notch (1401) on the rod moves to the right, and the edge line B of the notch (1401) is away from the column edge calibration line C of the inspection column (1400), that is, relative movement occurs, and then the notch gap width value t is obtained based on the notch gap captured image; Step S3, when the notch camera (20) moves, obtaining the rotation angle α of the servo motor (1); Step S4, obtaining the monitoring accuracy ε of the notch camera (20) based on the notch gap width value t obtained in step S2 and the rotation angle α of the servo motor (1) obtained in step S3, as well as the preset notch camera moving distance calculation formula and the notch camera monitoring accuracy calculation formula.

10. The method for detecting the monitoring accuracy of a gap camera according to claim 1, characterized in that: In step S4, the calculation formula of the moving distance of the notch camera is as follows: L = d·(α / 360), formula (1); In formula (1), d is the lead of the screw; α is the rotation angle of the servo motor; In step S4, the calculation formula of the monitoring accuracy ε of the notch camera is as follows: ε=Lt,Formula (2); L is the moving distance of the notch camera; t is the width of the notch gap obtained by processing the notch gap image.

Images