Trailer absolute value position measuring device

Abstract

The utility model discloses a trailer absolute value position measuring device which comprises a frame mechanism and a walking mechanism, the frame mechanism comprises a bottom frame, horizontal rails are horizontally arranged on two sides of the bottom frame, a mounting frame is horizontally arranged in the middle of the bottom frame, an absolute value coding belt is fixed on the mounting frame, and the walking mechanism comprises a read head carrier, an encoder read head and a trailer connecting arm. Horizontal sliding blocks are arranged on the two sides of the read head carrier; according to the trailer absolute value position measuring device, the absolute position of the encoder read head on the absolute value coding belt can be read in a non-contact mode through the read head carrier, the encoder read head and the absolute value coding belt, absolute position data are received and processed through the data collector and transmitted and fed back to trailer equipment through the cable, and the trailer absolute value position measuring device is used for measuring the absolute value position of the encoder read head. The device has the characteristics of no accumulated error, no contact measurement, high-speed measurement applicability, convenience in maintenance and high reliability, and meanwhile, the absolute value coding belt is resistant to dust, oil, water and stain pollution, and has the characteristics of convenience in use, simplicity in maintenance and high reliability.

Description

Technical Field

[0001] The utility model relates to the measurement technology, in particular to an absolute position measurement device for a trailer. Background Art

[0002] In the application of ship model hydrodynamic towing tank test equipment, generally a 4-wheel self-propelled trailer is configured. The trailer can run on the straight tracks on both sides of the towing tank. The lengths of the towing tank and the straight tracks are 10 - 300 meters. The position of the trailer on the track is mainly measured by a roller type speed measuring wheel equipped with an absolute multi-turn encoder. The measurement principle is that the speed measuring wheel base is installed on the trailer and the speed measuring roller is pre-pressed on the track. When the trailer runs, the speed measuring roller is driven to roll passively by the track friction force. The rolling speed measuring roller further drives the absolute multi-turn encoder. The control system can read the number of turns data of the absolute multi-turn encoder in real time and further convert it into the current position and speed of the trailer by proportion. Limit switches and mechanical buffer braking devices are additionally configured at both ends of the trailer track for over-travel protection of the trailer.

[0003] However, in the actual application of the absolute multi-turn encoder speed measuring wheel, data deviation problems may occur. The main reasons are the cumulative errors caused by the thermal expansion and contraction of the roller, the diameter change caused by wear during the operation of the trailer, the measurement errors caused by the instantaneous slip of the roller due to oil and sewage contamination, the measurement errors caused by the instantaneous slip of the roller during high-speed operation and acceleration and deceleration, the zero position deviation caused by the overhead maintenance and reset of the equipment, or the data fluctuation caused by the looseness of mechanical devices such as the speed measuring wheel coupling. All the deviations and fluctuations will further affect the closed-loop motion control of the trailer and reduce the accuracy of trailer speed and position control. Content of the Utility Model

[0004] To solve the defects of the above-mentioned existing technologies, the utility model provides an absolute position measurement device for a trailer, which has the characteristics of no cumulative error, non-contact measurement, applicability to high-speed measurement, convenient maintenance, and high reliability.

[0005] To achieve the above technical purpose, the utility model adopts the following technical scheme: an absolute position measurement device for a trailer, including a frame mechanism and a traveling mechanism. The frame mechanism includes a chassis. Horizontal tracks are horizontally arranged on both sides of the chassis. An installation frame is horizontally arranged in the middle of the chassis. An absolute coding tape is fixed on the installation frame. The absolute coding tape is arranged parallel to the horizontal tracks. The traveling mechanism is arranged on the chassis and connected to the trailer. The traveling mechanism includes a read head carrier, an encoder read head, and a trailer connecting arm. Horizontal sliders are arranged on both sides of the read head carrier. The horizontal sliders are slidably matched with the horizontal tracks. The encoder read head is arranged below the read head carrier. The trailer connecting arm is arranged on the read head carrier and connected to the trailer.

[0006] Preferably, the read head carrier is provided with a control box, on which a data collector is provided. The data collector is connected to the encoder read head, and the data collector is connected to the trailer through a cable.

[0007] Preferably, the trailer connecting arm includes two parallel linear guide rails arranged above the read head carrier. A linear slider is slidably fitted on the linear guide rail. The linear slider is fixed to the bottom of the adapter plate. Lower bearing seats are provided at both ends of the adapter plate. A double-axis connecting plate is provided above the adapter plate. A trailer connecting plate is provided above the double-axis connecting plate. Upper bearing seats are provided at both ends of the trailer connecting plate. Bearings are provided on both the upper bearing seats and the lower bearing seats. Pins are fixed at both ends of the top and both ends of the bottom of the double-axis connecting plate, and the pins extend into the inner wall of the bearing.

[0008] Preferably, an installation plate is vertically arranged below the read head carrier. The encoder read head is fixed to the bottom of the installation plate, and the encoder read head is in non-contact connection with the absolute value coding tape.

[0009] In summary, the present invention has achieved the following technical effects:

[0010] The trailer absolute position measuring device of the present invention can read the absolute position of the encoder read head on the absolute value coding tape without contact through the read head carrier, the encoder read head and the absolute value coding tape. The absolute position data is received and processed by the data collector, and is transmitted and fed back to the trailer equipment through a cable, having the characteristics of no cumulative error, non-contact measurement, high-speed measurement applicability, convenient maintenance and high reliability. At the same time, the absolute value coding tape is resistant to dust, oil stains and water stains, and has the characteristics of convenient use, simple maintenance and high reliability. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 is a schematic structural diagram of the trailer absolute position measuring device of the present invention;

[0012] Figure 2 is a schematic structural diagram of the frame mechanism of the trailer absolute position measuring device of the present invention;

[0013] Figure 3 is a schematic structural diagram of the traveling mechanism of the trailer absolute position measuring device of the present invention;

[0014] Figure 4 is a schematic structural diagram of the traveling mechanism of the trailer absolute position measuring device of the present invention;

[0015] Description of the reference numerals in the drawings: 1. Coding tape reader head; 2. Reader head carrier; 3. Horizontal slider; 4. Trailer connecting arm; 4.1 Linear guide rail; 4.2 Linear slider; 4.3 Adapter plate; 4.4 Lower bearing seat; 4.5 Double-axis connecting plate; 4.6 Upper bearing seat; 4.7 Trailer connecting plate; 5. Cable; 6. Data collector; 7. Control box; 8. Chassis; 9. Mounting bracket; 10. Horizontal track; 11. Absolute value coding tape. Detailed implementation manners

[0016] The following further elaborates on the present utility model in conjunction with the accompanying drawings.

[0017] This specific embodiment is merely an interpretation of the present utility model and does not limit the present utility model. After reading this specification, those skilled in the art can make modifications to this embodiment without creative contributions as needed, but as long as it is within the scope of the claims of the present utility model, it is protected by the patent law.

[0018] In the description of the present utility model, it should be understood that the orientation or positional relationships indicated by the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. are based on the orientation or positional relationships shown in the drawings, and are only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus cannot be understood as a limitation to the present utility model.

[0019] In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include one or more of such features. In the description of the present utility model, "plural" means two or more, unless otherwise specifically defined.

[0020] In the present utility model, unless otherwise clearly specified and defined, the terms "installed", "connected", "connected to", "fixed", etc. should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or integrated; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the internal communication of two elements or the interaction relationship between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0021] In the present utility model, unless otherwise clearly defined and limited, the first feature being "on" or "under" the second feature may be that the first and second features are in direct contact, or the first and second features are indirectly in contact through an intermediate medium. Moreover, the first feature being "above", "over" and "on top of" the second feature may be that the first feature is directly above or obliquely above the second feature, or merely indicates that the first feature has a higher horizontal height than the second feature. The first feature being "under", "beneath" and "underneath" the second feature may be that the first feature is directly below or obliquely below the second feature, or merely indicates that the first feature has a lower horizontal height than the second feature.

[0022] Embodiment 1:

[0023] As Figure 1 As shown in Fig. -4, a trailer absolute position measuring device includes a frame mechanism and a traveling mechanism. The frame mechanism includes a chassis 8. Horizontal rails 10 are horizontally arranged on both sides of the chassis 8. An installation frame 9 is horizontally arranged in the middle of the chassis 8. An absolute value coding tape 11 is fixed on the installation frame 9. The absolute value coding tape 11 is arranged parallel to the horizontal rails 10. The traveling mechanism is arranged on the chassis 8 and is connected to the trailer. The traveling mechanism includes a read head carrier 2, an encoder read head and a trailer connecting arm 4. Horizontal sliders 3 are arranged on both sides of the read head carrier 2. The horizontal sliders 3 are slidably engaged with the horizontal rails 10. The encoder read head is arranged below the read head carrier 2. The trailer connecting arm 4 is arranged on the read head carrier 2 and is connected to the trailer.

[0024] For the trailer absolute position measuring device of this embodiment, through the read head carrier 2, the encoder read head and the absolute value coding tape 11, it is possible to read the absolute position of the encoder read head on the absolute value coding tape 11 without contact. The absolute position data is received and processed by a data collector 6, and is transmitted and fed back to the trailer equipment through a cable 5. It has the characteristics of no cumulative error, non-contact measurement, high-speed measurement applicability, convenient maintenance and high reliability. At the same time, the absolute value coding tape 11 is resistant to dust, oil stains and sewage pollution, and has the characteristics of convenient use, simple maintenance and high reliability.

[0025] The read head carrier 2 is provided with a control box 7. A data collector 6 is arranged on the control box 7. The data collector 6 is connected to the encoder read head. The data collector 6 is connected to the trailer through a cable 5.

[0026] The trailer connecting arm 4 includes two linearly guiding rails 4.1 which are arranged in parallel above the read head carrier 2. A linear slider 4.2 is slidably engaged with the linearly guiding rail 4.1. The linear slider 4.2 is fixed to the bottom of the adapter plate 4.3. Lower bearing seats 4.4 are provided at both ends of the adapter plate 4.3. A double-axis connecting plate 4.5 is provided above the adapter plate 4.3. A trailer connecting plate 4.7 is provided above the double-axis connecting plate 4.5. Upper bearing seats 4.6 are provided at both ends of the trailer connecting plate 4.7. Bearings are provided on both the upper bearing seats 4.6 and the lower bearing seats 4.4. Pin shafts are fixed to both the top ends and the bottom ends of both ends of the double-axis connecting plate 4.5. The pin shafts extend into the inner wall of the bearings. When being passively towed, when the trailer connecting plate 4.7 is subjected to spatial attitude fluctuations in a non-moving direction, that is, when the horizontal distance and the vertical distance of the trailer connecting plate 4.7 relative to the horizontal track 10 change, mechanical position compensation can be performed, so as to avoid the vertical acting force on the traveling mechanism in a non-linear moving direction, and ensure the smooth movement of the horizontal slider 3 on the horizontal track 10.

[0027] An installation plate is vertically arranged below the read head carrier 2. The encoder read head is fixed to the bottom of the installation plate. The encoder read head is in non-contact connection with the absolute value coding tape 11.

[0028] Working principle: The traveling mechanism is embedded and installed in the frame mechanism B fixed on the shore. The traveling mechanism is connected to the user trailer through the trailer connecting arm 4. After connection, the traveling mechanism can move horizontally at a low speed or a high speed along the frame mechanism under the towing of the trailer. At this time, the coding tape read head 1 installed on the traveling mechanism reads the absolute position of the absolute value coding tape 11 in real time without contact. After the absolute position data is received and processed by the data collector 6, it is transmitted and fed back to the trailer equipment through the cable 5. Workers can preset the vertical direction through the control box 7 and control the trailer equipment through the cable 5.

[0029] The above description is only a preferred embodiment of the present invention, and does not impose any form of limitation on the present invention. Any simple modification, equivalent change and modification made to the above embodiments based on the technical essence of the present invention shall fall within the scope of the technical solution of the present invention.

Claims

1. A trailer absolute position measuring device, characterized in that: include A frame mechanism, the frame mechanism comprising a base frame, horizontal tracks being horizontally arranged on both sides of the base frame, a mounting frame being horizontally arranged in the middle of the base frame, an absolute value coding belt being fixed to the mounting frame, and the absolute value coding belt being arranged parallel to the horizontal tracks; The walking mechanism is arranged on the base frame and connected to the trailer. The walking mechanism includes a reader carrier, an encoder reader and a trailer connecting arm. Horizontal sliders are provided on both sides of the reader carrier. The horizontal sliders slide in conjunction with horizontal tracks. The encoder reader is arranged below the reader carrier. The trailer connecting arm is arranged on the reader carrier and connected to the trailer.

2. The trailer absolute position measuring device according to claim 1, characterized in that: The reader carrier is provided with a control box, the control box is provided with a data collector, the data collector is connected to the encoder reader, and the data collector is connected to the trailer via a cable.

3. The trailer absolute position measuring device according to claim 1, characterized in that: The trailer connecting arm includes two parallel linear guide rails arranged above the reader carrier, and a linear slider is slidably fitted on the linear guide rails, and the linear slider is fixed to the bottom of the adapter plate. Lower bearing seats are provided at both ends of the adapter plate, and a double-axis connecting plate is provided above the adapter plate. A trailer connecting plate is provided above the double-axis connecting plate, and upper bearing seats are provided at both ends of the trailer connecting plate. Bearings are provided on the upper bearing seat and the lower bearing seat, and pins are fixed at both ends of the top and bottom of the double-axis connecting plate, and the pins extend into the inner wall of the bearing.

4. The trailer absolute position measuring device according to claim 1, characterized in that: A mounting plate is vertically arranged below the reader carrier, the encoder reader is fixed to the bottom of the mounting plate, and the encoder reader is contactlessly connected to the absolute value encoding tape.

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