Stroke sensor detection device

Abstract

The utility model provides a stroke sensor detection device, which comprises a stroke test part and a control part, in the scheme, a moving part of a grating ruler and a magnetic ring synchronously move to respectively detect the stroke of a movable frame, the grating ruler is high in precision, and the detection result of the grating ruler is compared with the detection result of a stroke sensor. Therefore, automatic detection can be realized and whether the precision of the stroke sensor is qualified can be judged. Specifically, an error range is set in advance, detection results are compared and judged through the control part, if the error between the detection result of the grating ruler and the detection result of the stroke sensor is within the error range, it is considered that the precision of the stroke sensor is qualified, namely, the requirement is met, and the stroke sensor is detected. And if the detection result of the grating ruler and the detection result of the stroke sensor exceed the error range, the stroke sensor is considered to be unqualified.

Description

Technical Field

[0001] The utility model relates to the technical field of detection equipment, in particular to a stroke sensor detection device. Background Art

[0002] The stroke sensor of the push cylinder mainly uses a magnetostrictive stroke sensor, which must be installed inside the push cylinder. This type of sensor is difficult to install and disassemble, and is almost impossible to replace if damaged in underground coal mine conditions.

[0003] Currently, before the stroke sensor is installed inside the push cylinder, it is manually tested one by one using a multimeter. However, this testing method is not only inefficient, but can only detect whether the sensor is on or off, and cannot determine whether the accuracy meets the requirements. Utility Model Content

[0004] The utility model provides a stroke sensor detection device to solve the problem in the prior art that manual detection of the stroke sensor is low in efficiency and cannot detect whether the accuracy meets the requirements.

[0005] In order to solve the above problems, the utility model provides a stroke sensor detection device, including a stroke testing part and a control part, the stroke testing part includes a base plate, a movable frame and a grating ruler, the movable frame is arranged on the base plate to be movable back and forth, the grating ruler includes a fixed part and a moving part, the fixed part of the grating ruler is fixed on the base plate, the extension direction of the fixed part of the grating ruler is the same as the moving direction of the movable frame, the moving part of the grating ruler is installed on the movable frame, the stroke rod of the stroke sensor to be tested is detachably installed on the base plate, and the travel rod is fixed to the base plate. The length direction is the same as the moving direction of the movable frame, the magnetic ring of the stroke sensor is sleeved on the stroke rod, and the magnetic ring is detachably mounted on the movable frame, and the stroke sensor and the grating scale are both electrically connected to the control unit; wherein, the movable frame drives the moving part of the grating scale and the magnetic ring to move synchronously, the stroke measured by the grating scale is the actual stroke of the movable frame, and the stroke output by the stroke sensor is the displayed stroke of the movable frame, and the control unit compares the actual stroke with the displayed stroke to determine whether the accuracy of the stroke sensor is qualified.

[0006] Furthermore, the stroke testing portion further comprises a stroke clamping head and a stroke clamping tail which are arranged at intervals, and both ends of the stroke rod are detachably connected to the stroke clamping head and the stroke clamping tail respectively.

[0007] Furthermore, the position of at least one of the travel clamping head and the travel clamping tail on the base plate is adjustable to adjust the distance between the travel clamping head and the travel clamping tail.

[0008] Furthermore, the movable frame has a first limiting groove, and the first limiting groove limits the magnetic ring;

[0009] And / or, the travel chuck has a second limiting groove, and the second limiting groove limits one end of the travel rod;

[0010] And / or, the travel clamping tail has a third limiting groove, and the third limiting groove limits the other end of the travel rod.

[0011] Furthermore, the stroke testing part also includes two parallel beams, the two beams are fixed to the base plate, the two ends of the stroke clamping head are respectively connected to the two beams, and the two ends of the stroke clamping tail are respectively connected to the two beams.

[0012] Furthermore, the stroke testing part further includes a transmission assembly, which includes a stepping motor and a slide, and the stepping motor drives the movable frame to move back and forth via the slide.

[0013] Furthermore, the control unit includes a current detection module and a voltage detection module. The current detection module is used to detect the current of the stroke sensor, and the voltage detection module is used to detect the voltage of the stroke sensor.

[0014] Furthermore, the stroke sensor detection device further includes a cabinet and a display screen, the stroke testing portion is disposed in a cavity of the cabinet, the display screen is mounted on the cabinet, and the display screen is electrically connected to the control portion.

[0015] Furthermore, the stroke sensor detection device further includes a magnetic field testing unit, which includes a field strength meter, and the field strength meter is used to detect the magnetic field of the magnetic ring.

[0016] Furthermore, the magnetic field testing unit also includes an electric turntable and a magnetic ring fixture. The electric turntable drives the magnetic ring fixture to rotate. The magnetic ring fixture is used to carry the magnetic ring to be tested. When the magnetic ring rotates to the detection position, the field strength meter detects the magnetic field of the magnetic ring.

[0017] Furthermore, the magnetic field testing unit also includes a chassis, the field strength meter and the electric turntable are both installed on the chassis, and the magnetic ring tooling has a plurality of installation slots, each of the installation slots is used to install one magnetic ring.

[0018] The technical solution of the utility model is applied to provide a stroke sensor detection device, including a stroke testing part and a control part, the stroke testing part includes a base plate, a movable frame and a grating scale, the movable frame is movably arranged on the base plate, the grating scale includes a fixed part and a moving part, the fixed part of the grating scale is fixed on the base plate, the extension direction of the fixed part of the grating scale is the same as the moving direction of the movable frame, the moving part of the grating scale is installed on the movable frame, the stroke rod of the stroke sensor to be measured is detachably installed on the base plate, the length direction of the stroke rod is the same as the moving direction of the movable frame, the magnetic ring of the stroke sensor is sleeved on the stroke rod, and the magnetic ring is detachably installed on the movable frame, the stroke sensor and the grating scale are both electrically connected to the control part; wherein, the movable frame drives the moving part and the magnetic ring of the grating scale to move synchronously, the stroke measured by the grating scale is the actual stroke of the magnetic ring, the stroke output by the stroke sensor is the displayed stroke of the magnetic ring, and the control part compares the actual stroke with the displayed stroke to determine whether the accuracy of the stroke sensor is qualified. In this solution, the moving portion of the grating scale and the magnetic ring move synchronously, respectively detecting the travel of the movable frame. The grating scale has high accuracy, and the detection results of the grating scale are compared with those of the travel sensor, thereby automatically detecting and determining whether the travel sensor's accuracy is qualified. Specifically, an error range is set in advance, and the detection results are compared and determined by the control unit. If the error between the grating scale's detection results and the travel sensor's detection results is within the error range, the travel sensor is considered to have qualified accuracy, that is, meet the requirements. If the detection results of the grating scale and the travel sensor are outside the error range, the travel sensor is considered to have failed. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The drawings constituting part of this application are provided to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are provided to explain the present invention and do not constitute an improper limitation of the present invention. In the drawings:

[0020] Figure 1 A schematic structural diagram of a stroke sensor detection device provided by an embodiment of the present utility model is shown;

[0021] Figure 2 Shown Figure 1 Schematic diagram of the structure of the stroke test part;

[0022] Figure 3 Shown Figure 1 Schematic diagram of the structure of the magnetic field testing part.

[0023] The above drawings include the following reference numerals:

[0024] 10. Bottom plate;

[0025] 20. Movable rack;

[0026] 30. Grating ruler;

[0027] 41. Travel chuck;

[0028] 42. Stroke clamping tail;

[0029] 50. beam;

[0030] 60. Transmission components;

[0031] 71. Cabinet;

[0032] 72. Display screen;

[0033] 73. Control Department;

[0034] 81. Field strength meter;

[0035] 82. Electric turntable;

[0036] 83. Magnetic ring tooling;

[0037] 84. Chassis. DETAILED DESCRIPTION

[0038] 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 embodiments described are only some embodiments of the present invention, not all embodiments. The following description of at least one exemplary embodiment is actually only illustrative and in no way serves as any limitation on the present invention and its application or use. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0039] like Figures 1 to 3As shown, an embodiment of the present invention provides a stroke sensor detection device, including a stroke testing unit and a control unit 73, wherein the stroke testing unit includes a base plate 10, a movable frame 20 and a grating ruler 30, wherein the movable frame 20 is arranged on the base plate 10 so as to be movable back and forth, and the grating ruler 30 includes a fixed part and a moving part, wherein the fixed part of the grating ruler 30 is fixed on the base plate 10, and the extending direction of the fixed part of the grating ruler 30 is the same as the moving direction of the movable frame 20, and the moving part of the grating ruler 30 is mounted on the movable frame 20, and the stroke rod of the stroke sensor to be tested is detachably mounted on the base plate 10, and the stroke rod of the stroke sensor to be tested is detachably mounted on the base plate 10. The length direction of the travel rod is the same as the moving direction of the movable frame 20. The magnetic ring of the travel sensor is sleeved on the travel rod, and the magnetic ring is detachably mounted on the movable frame 20. The travel sensor and the grating ruler 30 are both electrically connected to the control unit 73. The movable frame 20 drives the moving part of the grating ruler 30 and the magnetic ring to move synchronously. The travel measured by the grating ruler 30 is the actual travel of the movable frame 20. The travel output by the travel sensor is the displayed travel of the movable frame 20. The control unit 73 compares the actual travel with the displayed travel to determine whether the accuracy of the travel sensor is qualified.

[0040] In this solution, the moving portion of the grating scale 30 and the magnetic ring of the stroke sensor move synchronously, respectively detecting the stroke of the movable frame 20. The grating scale 30 has high precision, and the detection results of the grating scale 30 are compared with those of the stroke sensor, thereby automatically detecting and determining whether the stroke sensor's accuracy is acceptable. Specifically, an error range is set in advance, and the detection results are compared and determined by the control unit 73. If the error between the detection results of the grating scale 30 and the stroke sensor is within the error range, the stroke sensor is deemed to be accurate and meets the requirements. If the detection results of the grating scale 30 and the stroke sensor are outside the error range, the stroke sensor is deemed to be unqualified.

[0041] like Figure 2 As shown, the stroke test section further includes a stroke clamping head 41 and a stroke clamping tail 42 that are spaced apart, and the two ends of the stroke rod are detachably connected to the stroke clamping head 41 and the stroke clamping tail 42, respectively, thereby achieving reliable fixation of the two ends of the stroke rod.

[0042] Specifically, the position of at least one of the travel clamping head 41 and the travel clamping tail 42 on the base plate 10 is adjustable to adjust the distance between the travel clamping head 41 and the travel clamping tail 42. This can accommodate travel sensors of different lengths, thereby improving the versatility of the device.

[0043] The movable frame 20 has a first limiting groove for limiting the position of the magnetic ring; and / or the travel clamping head 41 has a second limiting groove for limiting the position of one end of the travel rod; and / or the travel clamping tail 42 has a third limiting groove for limiting the position of the other end of the travel rod. By providing the limiting grooves, the end of the travel rod or the magnetic ring can be limited in position.

[0044] like Figure 2 As shown, the stroke testing part also includes two parallel beams 50, the two beams 50 are fixed to the base plate 10, the two ends of the stroke clamping head 41 are respectively connected to the two beams 50, and the two ends of the stroke clamping tail 42 are respectively connected to the two beams 50.

[0045] The two crossbeams 50 are used to fix and support the travel clamping head 41 and the travel clamping tail 42. The crossbeams 50 can be made of aluminum profiles.

[0046] In this embodiment, the travel test unit further includes a transmission assembly 60, which includes a stepper motor and a slide. The stepper motor drives the movable frame 20 to move back and forth via the slide. This allows for precise movement of the movable frame 20. The slide is a mature existing product.

[0047] like Figure 1 As shown, the control unit 73 includes a current detection module and a voltage detection module. The current detection module is used to detect the current of the stroke sensor, and the voltage detection module is used to detect the voltage of the stroke sensor. This allows the current and voltage of the stroke sensor to be automatically detected during the detection process, improving efficiency.

[0048] The stroke sensor detection device further includes a cabinet 71 and a display screen 72. The stroke test unit is disposed within the cavity of the cabinet 71, and the display screen 72 is mounted on the cabinet 71. The display screen 72 is electrically connected to the control unit 73. The cabinet 71 serves as a protective barrier. The display screen 72 displays detection data for easy operation and viewing.

[0049] Furthermore, the travel sensor detection device further includes a magnetic field testing unit, which includes a field strength meter 81, and the field strength meter 81 is used to detect the magnetic field of the magnetic ring, so as to detect whether the magnetic ring is qualified.

[0050] Specifically, if Figure 3As shown, the magnetic field testing unit further includes an electric turntable 82 and a magnetic ring fixture 83. The electric turntable 82 drives the magnetic ring fixture 83 to rotate. The magnetic ring fixture 83 is used to carry the magnetic ring to be tested. When the magnetic ring rotates to the detection position, the field strength meter 81 detects the magnetic field of the magnetic ring. This achieves automatic detection of the magnetic ring.

[0051] Furthermore, the magnetic field testing unit includes a chassis 84, on which the field strength meter 81 and the electric turntable 82 are mounted. The magnetic ring fixture 83 has multiple mounting slots, each of which is used to mount a magnetic ring. This allows multiple magnetic rings to be tested, improving testing efficiency.

[0052] Before the test, the magnetic ring to be tested is installed in the installation groove of the magnetic ring fixture 83. During the test, the electric turntable 82 moves 45° each time to detect the magnetic field strength of a magnetic ring. Then the field strength meter 81 reads the magnetic steel data underneath it and transmits it to the control unit 73. The detected magnetic field is compared with the magnetic field indicated by the magnetic ring at the factory to determine whether it is qualified, and then the data is transmitted to the display screen 72.

[0053] Furthermore, the travel sensor detection device also includes a retractable box, which is installed at the bottom of the cabinet 71, and the magnetic field testing unit is installed in the cavity of the box. When the magnetic field testing unit is not needed, the box is pushed into the cabinet 71 to reduce the occupied space.

[0054] This testing device not only checks the current, voltage, and accuracy of the stroke sensor, but also the magnetic field strength of the magnetic ring to ensure the integrity of the stroke sensor before installation on the hydraulic cylinder. Compared with existing manual testing methods, this solution improves the efficiency and accuracy of stroke sensor testing.

[0055] The above description is merely an optional embodiment of the present invention and is not intended to limit the present invention. Persons skilled in the art will readily appreciate that the present invention is susceptible to various modifications and variations. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of the present invention shall be included within the scope of protection of the present invention.

[0056] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present application. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprise" and / or "include" are used in this specification, they indicate the presence of features, steps, operations, devices, components and / or combinations thereof.

[0057] Unless otherwise specified, the relative arrangement of the parts and steps, numerical expressions and numerical values ​​set forth in these embodiments do not limit the scope of this solution. At the same time, it should be understood that, for ease of description, the sizes of the various parts shown in the drawings are not drawn according to actual proportional relationships. The techniques, methods and equipment known to those of ordinary skill in the relevant art may not be discussed in detail, but in appropriate cases, the techniques, methods and equipment should be considered as part of the specification. In all examples shown and discussed here, any specific values ​​should be interpreted as being merely exemplary, rather than limiting. Therefore, other examples of the exemplary embodiments may have different values. It should be noted that similar numbers and letters represent similar items in the following figures, and therefore, once an item is defined in one figure, it does not need to be further discussed in subsequent figures.

[0058] In the description of this scheme, it should be understood that the directions or positional relationships indicated by directional words such as "front, back, up, down, left, right", "horizontal, vertical, vertical, horizontal" and "top, bottom" are usually based on the directions or positional relationships shown in the accompanying drawings. They are only for the convenience of describing this scheme and simplifying the description. Unless otherwise stated, these directional words do not indicate or imply that the device or element referred to must have a specific direction or be constructed and operated in a specific direction. Therefore, they cannot be understood as limiting the scope of protection of this scheme; the directional words "inside and outside" refer to the inside and outside relative to the outline of each component itself.

[0059] For ease of description, spatially relative terms such as "above", "above", "on the upper surface of", "above", etc. may be used herein to describe the spatial positional relationship of a device or feature to other devices or features as shown in the figures. It should be understood that spatially relative terms are intended to include different orientations of the device in use or operation in addition to the orientation described in the figures. For example, if the device in the drawings is inverted, the device described as "above other devices or structures" or "above other devices or structures" will be positioned as "below other devices or structures" or "below other devices or structures". Thus, the exemplary term "above" can include both "above" and "below". The device can also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatially relative descriptions used here are interpreted accordingly.

[0060] In addition, it should be noted that the use of words such as "first" and "second" to limit components is only for the convenience of distinguishing the corresponding components. Unless otherwise stated, the above words have no special meaning and therefore cannot be understood as limiting the scope of protection of this solution.

Claims

1. A stroke sensor detection device, characterized in that: The invention comprises a stroke testing part and a control part (73), wherein the stroke testing part comprises a base plate (10), a movable frame (20) and a grating ruler (30), wherein the movable frame (20) is arranged on the base plate (10) so as to be movable back and forth, and the grating ruler (30) comprises a fixed part and a moving part, wherein the fixed part of the grating ruler (30) is fixed on the base plate (10), and the extending direction of the fixed part of the grating ruler (30) is the same as the moving direction of the movable frame (20), and the moving part of the grating ruler (30) is installed on the movable frame (20), and the stroke rod of the stroke sensor to be tested is detachably installed on the base plate (10), and the length direction of the stroke rod is the same as that of the movable frame (20). The movable frame (20) has the same moving direction, the magnetic ring of the stroke sensor is sleeved on the stroke rod, and the magnetic ring is detachably mounted on the movable frame (20), and the stroke sensor and the grating ruler (30) are both electrically connected to the control unit (73); wherein, the movable frame (20) drives the moving part of the grating ruler (30) and the magnetic ring to move synchronously, the stroke measured by the grating ruler (30) is the actual stroke of the movable frame (20), and the stroke output by the stroke sensor is the displayed stroke of the movable frame (20), and the control unit (73) compares the actual stroke with the displayed stroke to determine whether the accuracy of the stroke sensor is qualified.

2. The stroke sensor detection device according to claim 1, characterized in that: The stroke testing part further comprises a stroke clamping head (41) and a stroke clamping tail (42) arranged at intervals, and both ends of the stroke rod are detachably connected to the stroke clamping head (41) and the stroke clamping tail (42) respectively.

3. The stroke sensor detection device according to claim 2, characterized in that: The position of at least one of the travel clamping head (41) and the travel clamping tail (42) on the base plate (10) is adjustable to adjust the distance between the travel clamping head (41) and the travel clamping tail (42).

4. The stroke sensor detection device according to claim 2, characterized in that: The movable frame (20) has a first limiting groove, and the first limiting groove limits the magnetic ring; And / or, the travel chuck (41) has a second limiting groove, and the second limiting groove limits one end of the travel rod; And / or, the travel clamping tail (42) has a third limiting groove, and the third limiting groove limits the other end of the travel rod.

5. The stroke sensor detection device according to claim 2, characterized in that: The stroke testing part also includes two parallel beams (50), the two beams (50) are fixed to the base plate (10), the two ends of the stroke clamping head (41) are respectively connected to the two beams (50), and the two ends of the stroke clamping tail (42) are respectively connected to the two beams (50).

6. The stroke sensor detection device according to claim 1, characterized in that: The stroke testing unit further comprises a transmission assembly (60), wherein the transmission assembly (60) comprises a stepping motor and a slide, and the stepping motor drives the movable frame (20) to move back and forth via the slide.

7. The stroke sensor detection device according to claim 1, characterized in that: The control unit (73) includes a current detection module and a voltage detection module. The current detection module is used to detect the current of the stroke sensor, and the voltage detection module is used to detect the voltage of the stroke sensor.

8. The stroke sensor detection device according to claim 1, characterized in that: The stroke sensor detection device further includes a cabinet (71) and a display screen (72), the stroke testing portion is arranged in a cavity of the cabinet (71), the display screen (72) is mounted on the cabinet (71), and the display screen (72) is electrically connected to the control portion (73).

9. The stroke sensor detection device according to claim 1, characterized in that: The stroke sensor detection device further comprises a magnetic field testing unit, wherein the magnetic field testing unit comprises a field strength meter (81), and the field strength meter (81) is used to detect the magnetic field of the magnetic ring.

10. The stroke sensor detection device according to claim 9, characterized in that: The magnetic field testing section further comprises an electric turntable (82) and a magnetic ring fixture (83), wherein the electric turntable (82) drives the magnetic ring fixture (83) to rotate, and the magnetic ring fixture (83) is used to carry the magnetic ring to be tested, and when the magnetic ring rotates to a detection position, the field strength meter (81) detects the magnetic field of the magnetic ring; the magnetic field testing section further comprises a chassis (84), wherein the field strength meter (81) and the electric turntable (82) are both mounted on the chassis (84), and the magnetic ring fixture (83) has a plurality of mounting slots, and each mounting slot is used to mount one magnetic ring.

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