Method for measuring rack pitch in rack construction

Abstract

This invention discloses a method for measuring rack pitch during rack and pinion construction, comprising: S1, moving a detection probe above the rack mating position; S2, using the detection probe to acquire the height and position parameters of a reference point, as well as the position parameter of the measurement point; S3, using the height and position parameters received by the control unit to generate a height difference. ΔH The position difference between the measurement point and the actual position is used to generate the pitch. The generated pitch is then... L Compare with the preset pitch; if the pitch... L If the preset pitch is exceeded, an alarm message is generated, and the alarm unit sounds an alarm based on the alarm message. This invention not only realizes the automated detection of rack pitch, but also eliminates the influence of trolley tilt caused by slide rail wear on the measurement results. By using tilt degree for correction, the accuracy of the measurement results (i.e., pitch) is improved, ensuring that the tooth groove size formed by two adjacent racks is consistent with the tooth groove size of the rack, thus ensuring the quality of rack rail construction.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of rack construction of rack railway, and particularly relates to a rack pitch measurement method in rack construction. BACKGROUND

[0002] The rack railway is provided with a rack in the middle of the ordinary railway, the gear device on the bogie of the rack railway is engaged with the rack, so that the traction and braking of the rack railway are realized, and the rack railway is particularly suitable for railway passenger transportation for mountain scenic area tourism and railway transportation of auxiliary equipment in coal mine. The rack of the rack railway is connected by a plurality of racks, and if the pitch between the racks exceeds the design error or the racks are misaligned, the safe operation of the rack railway will be affected. Therefore, in order to ensure the construction quality of the rack, the centering construction of the rack is usually completed by using a tooling in actual construction. However, in actual construction, the pitch of the rack still exceeds the design error, and there is no related measurement tooling or measurement method to solve the problem that the pitch of the rack exceeds the design range. SUMMARY

[0003] Therefore, the present application provides a rack pitch measurement method in rack construction, which can realize the automatic and rapid measurement of the pitch of every two racks, can reduce the measurement error as much as possible to improve the accuracy of the measurement data, has high measurement precision, and further improves the rack construction quality.

[0004] To achieve the above object, the present application adopts the following technical scheme:

[0005] The rack pitch measurement method in rack construction has the characteristics that a special pitch measurement device is used, and the pitch measurement device comprises

[0006] The walking trolley comprises a walking frame arranged horizontally, a pair of driving wheels and at least one pair of driven wheels arranged on the walking frame, and a walking power source in transmission connection with the driving wheels, and the walking power source drives the walking trolley to walk along the existing steel rail by driving the driving wheels;

[0007] The detection probe has an actuator universal ball head, and the actuator universal ball head enables the probe of the detection probe to have a horizontal storage state and a vertical measurement state;

[0008] The probe moving mechanism has a moving part moving horizontally and reciprocally, and the moving part is connected with the actuator universal ball head to drive the detection probe to move horizontally and reciprocally in the direction of the rack;

[0009] The control system includes a control unit and an alarm unit for alarming. The signal output terminal of the detection probe is connected to the signal input terminal of the control unit, and the control output terminal of the control unit is connected to the control input terminals of the walking power source, the probe moving mechanism, and the actuator universal ball head, respectively.

[0010] The measurement method includes the following steps:

[0011] S1, set up the traveling trolley on the existing steel rail, start the traveling power source, and make the traveling trolley move along the existing steel rail towards the rack docking position, so that the detection probe moves above the docking position;

[0012] S2, using the detection probe to obtain the height and position parameters of the first reference point on the first rack, the position parameters of the first measurement point on the first rack, the height and position parameters of the second reference point on the second rack, and the position parameters of the second measurement point on the second rack;

[0013] S3, The control unit receives the height parameters of the first reference point and the second reference point, and generates a height value and a height difference. ΔH If the height difference ΔH =0 indicates that the traveling trolley and the rack are parallel. In this case, the position difference between the first and second measurement points generated by the control unit is the pitch. L ;

[0014] If the height difference between the first reference point and the second reference point ΔH If the value is not equal to 0, then the trolley and the rack have a tilt angle; the control unit generates the length of the line connecting the first and second measurement points as a value. L 2 The length of the connected line needs to be determined based on the tilt angle. L 2 Make corrections to obtain the pitch. L Among them, the tilt angle θ The calculation formula is:

[0015] θ = sin -1 (ΔH / L 1 )；

[0016] In the formula: ΔH L1 is the height difference between the first and second reference points; L2 is the line length value connecting the first and second reference points generated by the control unit. L 1;

[0017] Pitch L The corrected formula is: L = L 2 x cos θ = L 2x cos (sin -1 (ΔH / L 1 )) ;

[0018] S4, the control unit compares the generated pitch L with the preset pitch, and if the pitch L exceeds the preset pitch, an alarm information is generated, and the alarm unit alarms according to the alarm information.

[0019] Preferably, the specific content of the second step S2 is: the horizontal position of the detection probe is adjusted by the probe moving mechanism, so that it moves to the first reference point of the first rack, the detection probe is rotated to the vertical state to obtain the height parameter and the position parameter of the first reference point and transmit them to the control unit; the detection probe continues to advance to obtain the position parameter of the first measurement point on the tooth groove wall of the first rack and transmit it to the control unit; the detection probe is folded and moved between the racks and adjusted to the vertical state, the detection probe continues to advance to obtain the position parameter of the second measurement point on the second rack and transmit it to the control unit; the detection probe is adjusted to the horizontal state and moved to the first tooth groove of the second rack, the height parameter and the position parameter of the second reference point are obtained and transmitted to the control unit.

[0020] In the application, the probe moving mechanism further comprises a rotary motor and a transmission screw connected with the rotary motor, the transmission screw is horizontally arranged, the moving part is a nut threadedly connected with the transmission screw, and the actuator universal ball head of the detection probe is arranged on the nut.

[0021] In the application, the walking power source comprises a pair of motor reducers, the power shaft of each motor reducer is in driving connection with the wheel shaft of one driving wheel, and the control input end of the driver of the motor reducer and the control input end of the driver of the rotary motor are connected with the control output end of the control unit.

[0022] In the application, the pitch measuring device further comprises a display unit and a data storage unit, the display unit is in bidirectional communication connection with the control unit, and the data storage unit is in bidirectional communication connection with the control unit.

[0023] Preferably, the control unit is a single-chip microcomputer, the alarm unit is an alarm, the display unit is a display, the detection probe is an ultrasonic infrared double-monitoring probe, and the data storage unit is a data storage.

[0024] In the application, the middle part of the walking frame is provided with a mounting box, and the detection probe, the probe moving mechanism and the control system are arranged on and / or in the mounting box.

[0025] In this invention, the traveling trolley also includes a plurality of support legs for fixing the driving wheels and driven wheels, and the limiting block at the bottom of each support leg and the support leg form an L-shaped positioning groove that cooperates with the existing rail.

[0026] Compared with the prior art, the present invention mounts the control unit and detection components on the walking frame, and uses the walking power source to drive the walking frame, control unit and detection probe to move, eliminating the need for manual pushing of the walking frame, saving time and effort;

[0027] The detection probe of the present invention is connected to the probe moving mechanism through the universal ball joint of the actuator, which can realize the horizontal reciprocating movement of the detection probe above the rack docking position to obtain the position parameters of different measurement points. The structure is ingenious.

[0028] The universal ball joint of the actuator of the present invention enables the detection probe to have two states, horizontal and vertical. This not only facilitates the acquisition of the tooth groove position information of each rack connection end, but also allows the probe to be retracted when not in use, so that it can pass smoothly over the rack. This lays the foundation for the automated measurement of pitch.

[0029] This invention eliminates the influence of trolley tilt caused by slide rail wear on the measurement results. It uses tilt degree for correction, which improves the accuracy of the measurement results (i.e., pitch), ensures that the tooth groove size formed by two adjacent racks is consistent with the tooth groove size of the rack, ensures the quality of rack construction, and improves the operational safety of the rack vehicle. Attached Figure Description

[0030] Figure 1 This is a schematic diagram of the pitch measuring device described in this invention.

[0031] Figure 2 yes Figure 1 Side view.

[0032] Figure 3 yes Figure 2 Enlarged view of the moving mechanism of the probe.

[0033] Figure 4 yes Figure 1 A side view from another direction.

[0034] Figure 5 yes Figure 4 Enlarged view of the middle M section.

[0035] Figure 6 This is a calculation principle diagram in step S3 of the embodiment of the present invention.

[0036] Figure 7 This is a circuit block diagram of the pitch measuring device described in this invention. Detailed Implementation

[0037] The embodiments of the present application are described in detail below with reference to the accompanying drawings, which are implemented on the premise of the technical solutions of the present application, and detailed implementation manners and specific operation processes are given, but the protection scope of the present application is not limited to the following embodiments.

[0038] In the following embodiments, unless otherwise explicitly specified and limited, the terms "mounting", "connecting", "connection" that can occur should be understood in a broad sense, for example, can be fixed connection, can also be detachable connection, or integral connection, can be mechanical connection, or electrical connection, can be direct connection, or indirect connection through an intermediate medium, or internal communication of two elements. For those skilled in the art, the specific meanings of the above terms in the present application can be understood according to specific circumstances.

[0039] In addition, it should be further pointed out that in the description in the following embodiments, the positions or positional relationships indicated by the terms "front", "rear", "left", "right", "vertical", "horizontal", "inner", "outer" and the like are based on the positions or positional relationships shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and therefore cannot be understood as limiting the present application by indicating or implying that the devices or elements referred to must have a specific position, be constructed and operated in a specific position.

[0040] The core purpose of the present application is to provide a rack pitch measurement method in rack construction, to realize the rapid measurement of adjacent rack pitches in the rack construction process, so that the distance between every two adjacent racks is within the design error range, and further to ensure the safe driving of the rack car.

[0041] The rack pitch measurement method in rack construction described in the present application adopts a special pitch measurement device, which includes a walking trolley, a mounting box 5 arranged in the middle of the walking trolley, a detection probe 3 arranged at the center position of the mounting box 5, and a probe moving mechanism for driving the detection probe 3 to move horizontally back and forth. Figures 1-4 As shown in FIGS. 1 and 6, the walking trolley includes a walking frame 1.1 arranged horizontally (welded by a transverse steel pipe and a longitudinal steel pipe), a pair of driving wheels 1.2 and a pair of driven wheels 1.3 arranged below the walking frame 1.1, and a walking power source 1.6 drivingly connected to the driving wheels 1.2, which drives the walking trolley to walk on the existing steel rail 2 by driving the driving wheels 1.2;

[0042] The control system includes a control unit (i.e. a single-chip microcomputer) for acquiring position parameters and an alarm unit (i.e. an alarm) for alarming, the signal output end of the detection probe 3 is connected to the signal input end of the single-chip microcomputer, and the control output end of the control unit is connected to the control input end of the walking power source 1.6 and the probe moving mechanism respectively;

[0043] The probe seat of the detection probe 3 is a universal ball joint (preferably an actuator universal ball joint). The control unit can drive the detection probe 3 to rotate through the universal ball joint, so that the detection probe 3 is in both horizontal and vertical states. This allows the detection probe to not only pass over the rack, but also detect the information of the reference point and measurement point in the tooth groove.

[0044] The method for measuring rack pitch during rack construction according to the present invention specifically includes the following:

[0045] S1, the traveling trolley is mounted on the existing steel rail 2 and the detection probe 3 is positioned above the rack. The two driving wheels 1.2 of the traveling trolley are positioned on the two existing steel rails 2, and the two driven wheels 1.3 are also positioned on the two existing steel rails 2. When the traveling power source is working, it drives the traveling trolley and the mounting box to move above the rack docking position.

[0046] S2, when the detection probe is located above the rack mating area, the first reference point on the first rack F1 is obtained using the detection probe (i.e., Figure 2 and Figure 3 The height and position parameters of point A in the diagram, and the first measurement point on the first rack F1 (i.e., Figure 2 and Figure 3 The position parameters of point B in the middle, and the second reference point on the second rack F2 (i.e. Figure 2 and Figure 3 The height and position parameters of point E in the middle, and the second measurement point on the second rack F2 (i.e. Figure 2 and Figure 3 The position parameters of point D in the diagram are as follows:

[0047] The microcontroller adjusts the position of the detection probe 3 through the probe moving mechanism, so that it moves above the rack; when the detection probe 3 moves to point A of the first rack F1, the detection probe 3 rotates to a vertical position to obtain the height and position parameters of point A and transmits them to the control unit; the detection probe 3 continues to move forward to obtain the position parameters of point B on the tooth groove wall of the first rack F1 and transmits them to the control unit.

[0048] Fold the detection probe 3 into a horizontal state. When the detection probe 3 moves to position C between the racks, adjust it to a vertical state. The detection probe 3 continues to move forward to obtain the position parameters of point D on the second rack F2 and transmit them to the control unit. Adjust the detection probe 2 to a horizontal state and move it into the first tooth groove of the second rack F2 to obtain the height and position parameters of point E and transmit them to the control unit.

[0049] S3, the control unit receives the height parameters of point A and point E and generates the height value and height difference. ΔH If the height difference ΔH= 0, it indicates that the walking trolley and the rack are parallel, and the position difference between the B point and the D point generated by the control unit is the pitch L ;

[0050] If the height difference between the A point and the E point ΔH ≠ 0, the walking trolley and the rack have an inclination angle, and the control unit needs to generate the length value of the line connecting the B point and the D point according to the inclination angle L 2 The pitch is obtained by correction L :

[0051] Suppose the inclination angle is θ, The length value of the line connecting the A point and the E point generated by the control unit L 1 is the hypotenuse, the height difference between the A point and the E point is the first straight side, and the foot F of the perpendicular line from the A point to the first straight side is the second straight side, and the angle between the AE and the AF is the inclination angle θ , as shown in Figure 6 , the calculation formula of the inclination angle θ is as follows:

[0052] θ = sin -1 (ΔH / L 1 ) ;

[0053] In the formula: ΔH is the height difference between the first reference point and the second reference point;

[0054] A right triangle BDG is constructed, and the length value of the BG is the pitch L 2 , the angle between the BG and the BD is θ, according to the similarity principle of triangle, according to the known L 2 and θ , the corrected length BG of the BD is the pitch L , and the correction formula of the pitch L is as follows:

[0055] L = L 2 x cos θ = L 2 x cos (sin -1 (ΔH / L 1 )) ;

[0056] S4, the control unit compares the generated pitch L with the preset pitch, and if the pitch L exceeds the preset pitch, an alarm information is generated, and the alarm unit alarms according to the alarm information.

[0057] Of course, in the above measurement method, the height parameters and position parameters of the first reference point and the second reference point can also be measured, and the single-chip microcomputer generates the height difference of the first reference point and the second reference point; then the position parameters of the first measurement point and the second measurement point are obtained, and the measurement sequence defined in step S2 is not limited.

[0058] In actual installation, the walking power source 1.6 in the measurement method of the application includes two motor reducers, which are connected with the driving wheels 1.2 one by one, respectively, which is simple and convenient to install, and has lower requirements for the walking frame 1.1. Figure 1 and 4 As shown in the figure. Of course, the walking power source 1.6 can also be replaced by a belt drive mechanism with a reduction ratio or a chain drive mechanism with a reduction ratio.

[0059] In the application, the probe moving mechanism adopts the following specific structure: Figure 3 As can be seen, the probe moving mechanism includes a rotary motor 4.1 (the control input end of the driver of the rotary motor 4.1 is connected with the control output end of the single-chip microcomputer), a transmission screw 4.2 connected with the rotary motor 4.1 and a nut 4.3 matched with the transmission screw 4.2, the transmission screw 4.2 is horizontally arranged in the installation box 5, and a through slot for horizontal movement of the detection probe is formed in the bottom wall of the installation box 5. In order to ensure the movement accuracy of the detection probe, the installation box is provided with a guide pair composed of a guide rail and a sliding block, the sliding block and the nut are fixed together, and the guide pair is used for guiding.

[0060] In actual installation, the universal ball head of the detection probe 3 is hinged with the nut 4.3, and when the nut 4.3 moves horizontally back and forth under the action of the rotary motor 4.1, the position adjustment of the detection probe 3 can be realized.

[0061] In the application: Figures 2-4 As can be seen, four legs 1.4 are welded on the walking frame 1.1, one wheel is installed on each leg 1.4, the limiting block at the bottom of the leg 1.4 surrounds the leg 1.4 to form an L-shaped structure, and an auxiliary wheel 1.5 is arranged on the limiting block, which not only avoids the deflection of the walking trolley during walking, but also ensures the movement trajectory and accuracy of the walking trolley, and realizes the stable forward or backward movement of the walking trolley.

[0062] In the application, the pitch measuring device further includes a data storage unit and a display unit connected with the control unit in bidirectional communication, the data storage unit can store pitch data, and the display unit can directly display, which is convenient for observation.

[0063] In actual installation, the alarm 6 can be a sound alarm or a light alarm, and also can be a sound and light alarm; the display unit is a display 7, preferably an embedded touch display; the detection probe 3 is preferably an infrared ultrasonic double monitoring probe, which can not only obtain the height parameters of points A and E, but also obtain the position parameters of each measuring point; and the data storage unit is a data storage 8.

[0064] In actual installation, the application adopts a direct current power supply, and a storage battery is arranged in the installation box 5, which supplies power for each electrical component used in the application, as shown in the specific Figure 7 In addition, in actual installation, the motor of the motor reducer and the rotating motor are both selected as a direct current servo motor.

[0065] In actual use, in order to facilitate control, the pitch measuring device of the application is also matched with a remote controller, which is convenient for adjusting the position of the walking trolley and the position of the detection probe.

[0066] Finally, it should be emphasized that the above description is only the preferred embodiments of the application, and is not used to limit the application, although the application has been described in detail with reference to the foregoing embodiments, for those skilled in the art, they can still make modifications to the technical solutions recorded in the foregoing embodiments without paying creative labor, or make equivalent replacement to some technical features. Thus, any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the application should be included in the protection scope of the application.

Claims

1. A method for measuring the pitch of a rack in rack construction, characterized in that The measurement method adopts a special pitch measurement device, which comprises The walking trolley comprises a horizontal walking frame, a pair of driving wheels and at least one pair of driven wheels arranged on the walking frame, and a walking power source in driving connection with the driving wheels, wherein the walking power source drives the walking trolley to walk along the existing steel rail by driving the driving wheels; The detection probe has an actuator universal ball head, which enables the probe of the detection probe to have a horizontal folding state and a vertical measurement state; The probe moving mechanism has a horizontal reciprocating moving part, which is connected with the actuator universal ball head to drive the detection probe to reciprocate horizontally in the direction of the rack; The control system comprises a control unit and an alarm unit for alarm, the signal output end of the detection probe is connected with the signal input end of the control unit, and the control output end of the control unit is connected with the control input end of the walking power source, the probe moving mechanism and the actuator universal ball head respectively; The measurement method comprises the following steps: S1, the walking trolley is arranged on the existing steel rail, the walking power source is started, the walking trolley is moved along the existing steel rail to the rack butt joint position, and the detection probe is moved above the butt joint position; S2, the height parameters and position parameters of the first reference point on the first rack, the position parameters of the first measurement point on the first rack, the height parameters and position parameters of the second reference point on the second rack, and the position parameters of the second measurement point on the second rack are obtained by using the detection probe; S3, the control unit receives the height parameter of the first reference point and the height parameter of the second reference point and generates a height value and a height difference ΔH , if the height difference ΔH =0, it means that the walking trolley and the rack are parallel, at this time the position difference value of the first measuring point and the second measuring point generated by the control unit is the pitch L ; If the height difference between the first reference point and the second reference point ΔH If the value is not equal to 0, then the trolley and the rack have a tilt angle; the control unit generates the length of the line connecting the first and second measurement points as a value. L 2 The length of the connected line needs to be determined based on the tilt angle. L 2 Make corrections to obtain the pitch. L Among them, the tilt angle θ The calculation formula is: θ= sin -1 (ΔH / L 1 )； In the formula: ΔH is the height difference of the first reference point and the second reference point; L1 is the length value of the line connecting the first reference point and the second reference point generated by the control unit L 1; Pitch L The modified formula is: L = L 2 ×cosθ=L 2 ×cos(sin -1 (ΔH / L 1 )) ; S4, the control unit compares the generated pitch L with the preset pitch, if the pitch L exceeds the preset pitch, an alarm information is generated, and the alarm unit alarms according to the alarm information.

2. The method of measuring the pitch of a rack in rack construction according to claim 1, characterized in that: The step S2 specifically comprises the following contents: the horizontal position of the detection probe is adjusted by using the probe moving mechanism, so that the detection probe is moved to the first reference point of the first rack, the detection probe is rotated to the vertical state to obtain the height parameters and position parameters of the first reference point and transmit them to the control unit; the detection probe continues to move to obtain the position parameters of the first measurement point on the tooth groove wall of the first rack and transmit them to the control unit; the detection probe is folded and moved between the racks and adjusted to the vertical state, the detection probe continues to move to obtain the position parameters of the second measurement point on the second rack and transmit them to the control unit; the detection probe is adjusted to the horizontal state and moved to the first tooth groove of the second rack, the height parameters and position parameters of the second reference point are obtained and transmitted to the control unit.

3. The method of measuring the pitch of a rack in rack construction according to claim 1, characterized in that: The probe moving mechanism further comprises a rotating motor and a transmission screw connected with the rotating motor, the transmission screw is horizontally arranged, the moving part is a nut in screw connection with the transmission screw, and the actuator universal ball head of the detection probe is arranged on the nut.

4. The method of measuring the pitch of a rack in rack construction according to claim 3, characterized in that: The walking power source comprises a pair of motor reducers, the power shaft of each motor reducer is in driving connection with the axle of one of the driving wheels; the control input end of the driver of the motor reducer and the control input end of the driver of the rotating motor are connected with the control output end of the control unit.

5. The method of measuring the pitch of a rack in rack construction according to claim 1, characterized in that: The pitch measuring device further comprises a display unit and a data storage unit, the display unit is in bidirectional communication connection with the control unit, and the data storage unit is in bidirectional communication connection with the control unit.

6. The method of measuring the pitch of a rack in rack construction according to claim 5, characterized in that: The control unit is a single-chip microcomputer, the alarm unit is an alarm, the display unit is a display, the detection probe is an ultrasonic infrared double-monitoring probe, and the data storage unit is a data storage.

7. The method of measuring the pitch of a rack in rack construction according to claim 1, characterized in that: The middle part of the walking frame is provided with a mounting box, and the detection probe, the probe moving mechanism and the control system are arranged on and / or in the mounting box.

8. The method of measuring the pitch of a rack in rack construction according to claim 1, characterized in that: The walking trolley further comprises a plurality of supporting legs for fixing the driving wheels and the driven wheels, each supporting leg is provided at the bottom with a limiting block, the limiting block and the supporting leg are in L-shaped structure, and an auxiliary wheel walking along the side edge of the existing steel rail is arranged on the limiting block.

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