Multi-read-head long-stroke static magnetic grid gate opening degree measuring device

Abstract

The invention discloses a multi-read-head long-stroke static magnetic grid gate opening degree measuring device. The device comprises an upper mounting rack arranged on a gate wall, a lower mounting rack arranged on a gate, at least two read heads arranged on the upper mounting rack, and a marker arranged on the lower mounting rack; the reading heads are arranged in the vertical direction, and a first distance is formed between every two vertically adjacent reading heads; the marker is arranged in the vertical direction, and the height of the marker is a second distance; the second distance is not less than the first distance; the reading head is used for identifying the marker, transmitting data to the processing module for processing, and converting the data into the gate opening degree. Through the structural design, the length of the measuring rod is reduced by half, and the installation difficulty is reduced. Installation and maintenance are simple and convenient. The reading head is installed on the back of the sliding groove, and the cable can be connected to the processing module under the protection of the steel pipe and is not prone to damage.

Description

Technical Field

[0001] This invention relates to the field of measuring device technology, and more specifically, to a multi-reading head long-stroke static magnetic grid gate opening measuring device. Background Technology

[0002] Typically, an 8-meter-high vertical gate has a travel distance of up to 15 meters. When measuring the gate opening, if a conventional static magnetic grating installation method (one static magnetic grating reading head plus one measuring rod) is used, the required measuring rod length would reach 16 meters due to the gate structure. Furthermore, the measuring rod is fixed to the gate wall, while the static magnetic grating reading head is installed on the gate body and moves with the gate to measure the gate travel. It is evident that for this conventional method, the measuring rod is too long, and the cables and cable chains of the static magnetic grating reading head move with the opening and closing of the gate, easily causing damage to the sensor reading head and cables. Additionally, the installation is complex and not conducive to field use. Summary of the Invention

[0003] The summary section introduces a series of simplified concepts, which will be further explained in detail in the detailed description section. The summary section of this invention is not intended to limit the key features and essential technical features of the claimed technical solution, nor is it intended to determine the scope of protection of the claimed technical solution.

[0004] To at least partially solve the above problems, the present invention provides a multi-reading head long-stroke static magnetic grid gate opening measurement device, comprising: an upper mounting frame disposed on the gate wall, a lower mounting frame disposed on the gate, at least two reading heads disposed on the upper mounting frame, and a marker disposed on the lower mounting frame;

[0005] The reading heads are set vertically, and there is a first distance between two adjacent reading heads;

[0006] The markers are set vertically, and the height of the markers is the second distance;

[0007] The second distance is not less than the first distance;

[0008] The reader is used to identify markers and transmit the data to the processing module for processing, which then converts it into gate opening degree.

[0009] Preferably, it also includes a slide groove, which is disposed on the upper mounting bracket, and the reading head is disposed on the slide groove.

[0010] Preferably, it also includes a measuring rod, which is mounted on the lower mounting bracket, and the measuring rod is provided with the marker. The top of the measuring rod is located in a groove, and the marker is located in the groove.

[0011] Preferably, it also includes a follower device, and the top of the slide is connected to the upper mounting bracket via the follower device.

[0012] Preferably, the number of read heads is two.

[0013] Preferably, the processing module performs opening degree detection using the following method:

[0014] The processing module numbers the two read heads as No. 1 and No. 2, with the lower read head being read head 1 and the upper read head being read head 2.

[0015] When a marker is applied to two read heads simultaneously, and the data on both heads is greater than zero, this position is set as the calibration position.

[0016] Read head 1 is marked and stored as 1init within the processing module;

[0017] Read head number 2 is marked and stored as 2init within the processing module;

[0018] If the data from read head 1 is greater than zero and less than 1init, then the gate opening K is the data from read head 1.

[0019] If the data from read head 2 is greater than 2init, then the gate opening K is the data from read head 2 plus 1init minus 2init;

[0020] Finally, the gate opening degree is transmitted to the PLC via the interface.

[0021] Preferably, the reading head is a static magnetic grating ruler.

[0022] Preferably, the follower device is a spherical bearing.

[0023] Preferably, the groove is a U-shaped structure with openings on the sidewalls.

[0024] Preferably, the reading head is disposed on the outer wall of the slide.

[0025] Compared with the prior art, the present invention has at least the following beneficial effects:

[0026] The above structural design reduces the length of the measuring rod by half, simplifying installation. Installation and maintenance are simple and convenient. The reading head is mounted on the back of the slide, and the cable can be connected to the processing module under the protection of a steel pipe, minimizing damage.

[0027] The multi-reading head long-stroke static magnetic grid gate opening measurement device of the present invention, other advantages, objectives and features of the present invention will be partly apparent from the following description, and partly understood by those skilled in the art through study and practice of the present invention. Attached Figure Description

[0028] The accompanying drawings are provided to further illustrate the invention and form part of the specification. They are used in conjunction with embodiments of the invention to explain the invention and do not constitute a limitation thereof. In the drawings:

[0029] Figure 1 This is a schematic diagram of the invention at the gate wall and gate.

[0030] Figure 2 for Figure 1 A schematic diagram of the upper and middle mounting bracket.

[0031] Figure 3 for Figure 1 A schematic diagram of the lower mounting bracket.

[0032] Figure 4 for Figure 1 The main view.

[0033] Figure 5 This is a structural diagram of the upper mounting bracket.

[0034] Figure 6 This is a schematic diagram of the slide and the reading head.

[0035] Figure 7 for Figure 6 A partial schematic diagram.

[0036] Figure 8 This is a schematic diagram of the support component within the slide groove (one of the mounting plates is not shown).

[0037] Figure 9 This is an exploded view of the support component.

[0038] Figure 10 This is a schematic diagram showing the contact between the support and the measuring rod.

[0039] Figure 11 This is a schematic diagram showing the contact between the measuring rod and the pad when the rod swings out significantly.

[0040] Figure 12 This is a flowchart for aperture detection.

[0041] In the diagram: 100 gate wall, 200 gate, 1 upper mounting bracket, 2 lower mounting bracket, 3 reading head, 4 sliding groove, 5 measuring rod, 6 follow-up device, 71 fixed seat, 711 opening slot, 72 rotating shaft, 721 positioning hole, 73 abutment wheel, 74 mounting plate, 75 first shaft, 76 positioning column, 77 second shaft, 8 pad, 81 plug. Detailed Implementation

[0042] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments, so that those skilled in the art can implement it based on the description.

[0043] It should be understood that terms such as “having,” “comprising,” and “including” as used herein do not exclude the presence or addition of one or more other elements or combinations thereof.

[0044] This invention provides a multi-reader long-stroke static magnetic grid gate opening measurement device, comprising: an upper mounting frame 1 mounted on a gate wall 100, a lower mounting frame 2 mounted on a gate 200, at least two readers 3 mounted on the upper mounting frame 1, and a marker mounted on the lower mounting frame 2; the readers 3 are fixedly mounted on the gate wall via the upper mounting frame, and the cables of the readers 3 can be protected by metal pipes, thereby greatly reducing the risk of damage to the readers 3.

[0045] Typically, there are two reading heads 3, which are arranged vertically, and there is a first distance between two adjacent reading heads 3.

[0046] The markers are set vertically, and the height of the markers is the second distance;

[0047] The second distance is not less than the first distance;

[0048] Typically, the reading head 3 is a static magnetic scale. The reading head 3 is used to identify markers and transmit the data to the processing module for processing, and then convert it into the gate opening degree.

[0049] The invention also includes a slide 4, a measuring rod 5, and a follower device 6. The slide 4 is disposed on the upper mounting frame 1, and the top of the slide 4 is connected to the upper mounting frame 1 via the follower device 6. Further, the follower device 6 can be a spherical bearing. When the measuring rod 5 vibrates, the slide 4 can move together with the measuring rod 5.

[0050] The reading head 3 is disposed on the slide groove 4. Further, the slide groove 4 is a U-shaped structure with openings on its side walls, such as... Figure 7 As shown. Furthermore, the reading head 3 is disposed on the outer wall of the slide groove 4.

[0051] The measuring rod 5 is mounted on the lower mounting bracket 2, and the measuring rod 5 is provided with the marker. The top of the measuring rod 5 is located in the slide groove 4, and the marker is located in the slide groove 4.

[0052] The installation steps of this invention are as follows:

[0053] S1: Assemble the lower mounting bracket 2 onto the measuring rod 5;

[0054] S2: Locate the installation point of the lower mounting bracket 2 and weld the lower mounting bracket 2 onto the gate 200, ensuring it remains vertical.

[0055] S3: Check if the data read from the head 3 is normal and if a mark is made at the 0 point (calibrated position) of the slide 4;

[0056] S4: Assemble the upper mounting bracket 1 and the slide rail 4, hoist them down from the gate wall 100, and then place them on the measuring rod 5, ensuring the marker is located within the slide rail 4; lift the upper mounting bracket 1 so that the slide rail 4 coincides with the calibrated position of the marker, and move the upper mounting bracket 1 left, right, forward, and backward to bring the reading head 3 into a vertical position. Then make minor adjustments to the upper mounting bracket 1 up and down. When the slide rail 4 moves to the calibrated position (0 point), the position of the mounting bracket 1 is basically determined.

[0057] S5: The reading head 3 is connected to the display instrument or PLC through the processing module. The position of the upper mounting bracket 1 is finely adjusted so that the opening value is displayed at about 20mm. The reading head 3 is kept in a vertical position. Then, the upper mounting bracket 1 is installed on the gate wall 100 with expansion bolts.

[0058] S6: Check the data, fine-tune the bolts to ensure the reading head 3 is in a vertical position with an opening value of approximately 20mm (zero on the PLC). Note that the opening on both the left and right sides must be consistent.

[0059] Furthermore, taking a hyperbolic truss arch gate project as an example, the dam is 25 meters high, the hyperbolic truss arch gate is 7 meters high, the measuring stroke is 15 meters, and the gate is hoisted by a winch. The spans at both ends of the gate are 20 meters and 60 meters respectively. Due to the large span of the gate, it is difficult to ensure that the hoists on both sides are coaxial, which may lead to asynchronous movement of the gate and deviation of the gate's trajectory. When the deviation reaches a certain level, it will cause friction and jamming between the gate body and the gate wall, forcing the gate to stop operating. Therefore, the accuracy of the sensor directly determines the accuracy of the gate opening and the accuracy of the gap between the two sides of the gate. In view of the above characteristics, if the conventional static magnetic grating installation method is adopted, the measuring rod is installed on the gate and moves with the gate, and the static magnetic grating ruler is fixed to the gate wall by a bracket. Because the length of the measuring rod is determined by the stroke, the length of the static magnetic grating measuring rod in this scheme will reach 16 meters, which is 9 meters higher than the hyperbolic truss arch gate, making installation difficult to implement.

[0060] This invention employs a double-scale relay method, where two static magnetic scales (reading heads 3) are arranged sequentially on the slide groove 4 at a 7-meter interval. The slide groove 4 is connected to the upper mounting bracket 1 and installed on the gate wall 100. The measuring rod 5 (8 meters long) is fixed to the gate 200 by the lower mounting bracket and inserted into the slide groove 4. The measuring rod 5 moves up and down with the gate 200. The reading head 3 (on the slide groove 4) reads the opening value of the gate 200 through the displacement of the marker (on the measuring rod 5) and displays it through the relevant instrument connected to the processing module.

[0061] In this scheme, the marker on the measuring rod 5 simultaneously acts on two reading heads 3, and both reading heads 3 output data greater than 0. The difference between the two data is the installation interval S of the two reading heads 3 (i.e., the first distance). The data from the two reading heads 3 are connected to the processing module via the RS485 communication protocol. The processing module can determine the relative position of the marker and the two reading heads 3, and by processing and calculating the two sets of data, the opening degree K of the gate can be obtained.

[0062] Furthermore, a support member is provided on the inner wall of the slide groove 4, and the support member abuts against the side wall of the measuring rod 5. Because the cross-section of the slide groove 4 is U-shaped, such as... Figure 7 As shown, the measuring rod 5 can extend from the opening of the groove 4 into the interior of the groove 4, as... Figure 10 As shown, it abuts against the support. When the measuring rod 5 vibrates, the measuring rod 5 can transmit the vibration to the slide 4 through the support, thereby driving the slide 4 to move. This avoids the measuring rod 5 directly contacting and rubbing against the slide 4, which would cause the marker to wear and affect the data acquisition of the reading head 3.

[0063] Furthermore, the support member consists of a fixed seat 71 connected to the inner wall of the slide 4, a rotating shaft 72 movably connected to the fixed seat 71, at least two abutting wheels 73, and a mounting plate 74. The fixed seat 71 is welded to or detachably connected to the inner wall of the slide 4. The fixed seat 71 is provided with an opening groove 711 on the side facing the opening of the slide 4. The opening groove 711 is open on three sides. The rotating shaft 72 is set in the opening groove 711 through a first shaft 75. Because the opening groove 711 is open on three sides, all three openings are located on the same horizontal plane, and the first shaft 75 is set in the vertical direction, the rotating shaft 72 can rotate in the horizontal direction with the first shaft 75 as the rotation axis.

[0064] The rotating shaft 72 is provided with a positioning hole 721. The positioning hole 721 is usually located on the side of the rotating shaft 72 away from the fixed seat 71. The central axis of the positioning hole 721 is perpendicular to the central axis of the first shaft 75. A positioning post 76 is provided in the positioning hole 721. The two ends of the positioning post 76 are respectively connected to two mounting plates 74. There are usually two abutting wheels 73. The two abutting wheels 73 are located above and below the rotating shaft 72, respectively. The abutting wheels 73 are connected to the mounting plates 74 through the second shaft 77. The surface of the abutting wheel 73 that contacts the measuring rod 5 is provided with an arc-shaped groove. The surface of the measuring rod 5 that contacts the abutting wheel 73 is provided with an arc-shaped protrusion that is adapted to the arc-shaped groove.

[0065] This allows the measuring rod 5 to abut against the abutment wheel 73. When the measuring rod 5 moves up and down, the abutment wheel 73 will be driven to rotate, thus avoiding affecting the movement of the measuring rod 5. When the measuring rod 5 swings horizontally, the abutment wheel 73 can always fit against the measuring rod 5 through the arc groove, thus preventing the measuring rod 5 from hitting the slide groove 4.

[0066] Furthermore, in the aforementioned embodiment, we set a support member to prevent the measuring rod 5 from directly hitting the slide 4 when it swings horizontally. However, when the horizontal swing amplitude of the measuring rod 5 is large, it may still hit the opening of the slide 4, causing wear on the marker. Therefore, we set a non-rigid pad 8, such as a rubber pad 8, at the opening of the slide 4. Thus, when the horizontal swing amplitude of the measuring rod 5 is large and it hits the pad 8, the slide 4 can be moved by the pad 8, thereby avoiding damage to the marker. To facilitate the installation of the pad 8, a slot can be set at the opening of the slide 4, and a plug 81 can be set on the pad 8 to achieve detachable installation of the pad 8. Alternatively, the pad 8 can be installed directly by adhesive or other means. The pad 8 can extend from the top to the bottom of the slide 4, or it can be set at intervals on the slide 4.

[0067] The processing module performs opening degree detection as follows:

[0068] The processing module numbers the two read heads 3 as No. 1 and No. 2. The lower read head 3 is read head No. 1, and the upper read head 3 is read head No. 2.

[0069] When the marker is applied to both read heads 3 at the same time, and the data of both are greater than zero, this position is set as the calibration position;

[0070] Read head 1 is marked and stored as 1init within the processing module;

[0071] Read head number 2 is marked and stored as 2init within the processing module;

[0072] If the data from read head 1 is greater than zero and less than 1init, then the gate opening K is the data from read head 1.

[0073] If the data from read head 2 is greater than 2init, then the gate opening K is the data from read head 2 plus 1init minus 2init;

[0074] The entire opening stroke of the gate can be measured through this relay method;

[0075] Finally, the gate opening degree is transmitted to the PLC via the interface.

[0076] The calibration position can be completed by the instrument at the factory or during on-site installation. This calibration position is adjustable at any time, so that the installation interval between two adjacent reading heads 3 does not need to be very precise, which is beneficial for installation and debugging, and the gate opening will not produce errors.

[0077] By redesigning the structure described above, the installation positions of the measuring rod 5 and the reading head 3 in the traditional scheme were changed, and a relay measurement method was adopted. This reduced the length of the measuring rod 5 from 16 meters to 7.6 meters, almost the same height as the gate, thus halving the length and reducing installation difficulty. Installation and maintenance are simple and convenient. The reading head 3 is installed on the back of the slide 4, and the cable can be connected to the processing module under the protection of a steel pipe, making it less prone to damage.

[0078] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this invention and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0079] In this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection, an electrical connection, or a connection that allows communication between them; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0080] Although embodiments of the present invention have been disclosed above, they are not limited to the applications listed in the specification and embodiments. They can be applied to various fields suitable for the present invention. Other modifications can be easily made by those skilled in the art. Therefore, without departing from the general concept defined by the claims and their equivalents, the present invention is not limited to the specific details and illustrations shown and described herein.

Claims

1. A multi-reading head long-stroke static magnetic grating gate opening measurement device, characterized in that, include: An upper mounting bracket (1) is provided on the gate wall (100), a lower mounting bracket (2) is provided on the gate (200), at least two reading heads (3) are provided on the upper mounting bracket (1), and a marker is provided on the lower mounting bracket (2); The reading head (3) is set vertically, and there is a first distance between two adjacent reading heads (3); The markers are set vertically, and the height of the markers is the second distance; The second distance is not less than the first distance; The reading head (3) is used to identify markers and transmit the data to the processing module for processing and conversion into gate opening.

2. The multi-reading head long-stroke static magnetic grating gate opening measurement device according to claim 1, characterized in that, It also includes a slide (4), which is disposed on the upper mounting bracket (1), and the reading head (3) is disposed on the slide (4).

3. The multi-reading head long-stroke static magnetic grating gate opening measurement device according to claim 2, characterized in that, It also includes a measuring rod (5), which is mounted on the lower mounting bracket (2), and the measuring rod (5) is provided with the marker. The top of the measuring rod (5) is located in the groove (4), and the marker is located in the groove (4).

4. The multi-reading head long-stroke static magnetic grid gate opening measurement device according to claim 2, characterized in that, It also includes a follower device (6), the top of the slide (4) being connected to the upper mounting bracket (1) via the follower device (6).

5. The multi-reading head long-stroke static magnetic grating gate opening measurement device according to claim 1, characterized in that, The number of read heads (3) is two.

6. The multi-reading head long-stroke static magnetic grating gate opening measurement device according to claim 5, characterized in that, The processing module performs opening degree detection as follows: The processing module numbers the two reading heads (3) as No. 1 and No. 2, where the lower reading head (3) is No. 1 and the upper reading head (3) is No.

2. When the marker is applied to both read heads (3) at the same time, and the data of both are greater than zero, this position is set as the calibration position; Read head 1 is marked and stored as 1init within the processing module; Read head number 2 is marked and stored as 2init within the processing module; If the data from read head 1 is greater than zero and less than 1init, then the gate opening K is the data from read head 1. If the data from read head 2 is greater than 2init, then the gate opening K is the data from read head 2 plus 1init minus 2init; Finally, the gate opening degree is transmitted to the PLC via the interface.

7. The multi-reading head long-stroke static magnetic grating gate opening measurement device according to claim 1, characterized in that, The reading head (3) is a static magnetic grating ruler.

8. The multi-reading head long-stroke static magnetic grid gate opening measurement device according to claim 4, characterized in that, The follower device (6) is a spherical bearing.

9. The multi-reading head long-stroke static magnetic grating gate opening measurement device according to claim 3, characterized in that, The groove (4) is a U-shaped structure with an opening on the side wall.

10. The multi-reading head long-stroke static magnetic grating gate opening measurement device according to claim 2, characterized in that, The reading head (3) is disposed on the outer wall of the slide (4).

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