A fast calibration fixture for EFI sensors

Abstract

The present invention relates to a fast calibration fixture for an EFI sensor, comprising a support plate, a linear guide rail arranged on the support plate, a group of slide blocks which can slide along the linear guide rail, one of which is provided with a placement plate, a placement hole which matches the sensor to be calibrated is opened on the placement plate, one of which is provided with a calibration plate, a rotatable first locking guide rod and a second locking guide rod are provided on the calibration plate; a position-adjustable first positioning rod is provided on the first locking guide rod, and a position-adjustable second positioning rod is provided on the second locking guide rod; the outermost ends of the first positioning rod and the second positioning rod are respectively matched with the lowest point and the top point of the float of the sensor to be calibrated. The present invention can effectively solve the problem that the existing calibration fixture can only meet the requirements of a single size, and multiple calibration fixtures need to be prepared for products of different sizes to meet the calibration requirements, and there are problems such as excessive cost, cumbersome calibration, and low efficiency.

Description

Technical Field

[0001] The invention relates to a fast checking and clamping fixture for an electric spray sensor. Background Art

[0002] Liquid level sensors and liquid level switches are one of the automation components used in most industrial production sites, especially in systems with liquid level monitoring in automated control systems, such as top cover water level, oil tank level, pressure oil tank level, upper guide bearing level and water guide upper tank level. Their analog quantities and switch nodes are directly involved in system control and monitoring and are widely used. When the system is operating normally, the liquid level sensor and liquid level switch can only operate and measure within the normal range, and rarely appear extreme conditions at both ends, such as the liquid level is too low or too high, high liquid level range or low liquid level range, etc. In this area, the measurement range of the liquid level sensor analog quantity and the operation of the liquid level switch cannot be tested. Maintenance personnel generally conduct simulation tests on site and use manual magnetic nodes to operate the nodes on the equipment, which poses the risk of equipment misoperation or damage. When calibrating the liquid level sensor, the traditional displacement measurement method is used. The operator manually moves the float of the liquid level meter, and then uses a multimeter to measure the current value. At the same time, it is also necessary to measure the displacement of the float of the liquid level meter. This calibration method is relatively backward. Due to large errors caused by human factors, a qualified sensor may be calibrated as unqualified in linearity or the liquid level switch node may be misadjusted.

[0003] At present, there is no reliable calibration device in most industrial production sites. The calibration of liquid level sensors and liquid level switches is cumbersome and complicated, with low work efficiency. At the same time, the linearity after calibration is inaccurate and unreliable. Summary of the invention

[0004] The purpose of the present invention is to provide a fast calibration clamping fixture for an EFI sensor, which solves the problem that the existing calibration fixture can only meet the requirements of a single size, and multiple calibration fixtures need to be prepared for products of different sizes to meet the calibration requirements, resulting in excessive costs, cumbersome calibration and low efficiency.

[0005] The technical solution adopted by the present invention to solve its technical problems is: it includes a support plate, a linear guide rail arranged on the support plate, a group of sliders that can slide along the linear guide rail are arranged on the linear guide rail, one of the sliders is provided with a placement plate, the placement plate is provided with a placement hole matched with the sensor to be calibrated, one of the sliders is provided with a verification plate, the verification plate is provided with a rotatable first locking guide rod and a second locking guide rod; the first locking guide rod is provided with a position-adjustable first positioning rod, and the second locking guide rod is provided with a position-adjustable second positioning rod; the outermost ends of the first positioning rod and the second positioning rod are respectively matched with the lowest point and the top point of the float of the sensor to be calibrated.

[0006] In order to meet the needs of sensors in different directions, three sliders are provided, namely a left slider, a right slider and a main slider. The placement plate is detachably installed on one of the left slider and the right slider, and the verification plate is installed on the main slider.

[0007] In order to achieve the locking position after position adjustment, a limit fixing seat is provided on each slider, a limit plate is provided on one side of the limit fixing seat, a limit hole is provided on the limit plate, a limit groove matching the limit hole is provided on the support plate, and a limit bolt is provided in the limit hole; the verification plate and the placement plate are arranged on the limit fixing seat.

[0008] In order to achieve detachability, a positioning seat is provided at the bottom of the placement plate, and a placement groove adapted to the upper end surface of the limiting fixing seat is opened on the bottom surface of the positioning seat, a first bolt assembly hole is opened on one side wall of the placement groove, and a second bolt assembly hole adapted to the first bolt transfer hole is opened on one side wall of the limiting fixing seat, and the first bolt assembly hole and the second bolt assembly hole are equipped with assembly bolts.

[0009] In order to realize the rotation of the first locking guide rod and the second locking guide rod and limit the angle and direction of rotation, the first locking guide rod and the second locking guide rod are rotatably installed on the left and right side walls of the verification plate respectively, and the left and right side walls of the verification plate are also provided with a left wall guide plate and a right wall guide plate corresponding to the first locking guide rod and the second locking guide rod. The left wall guide plate and the right wall guide plate are both provided with an arc guide groove, and the first locking guide rod and the second locking guide rod are provided with a rotation positioning hole adapted to the arc guide groove, and a removable locking bolt is provided in the rotation positioning hole.

[0010] In order to provide another structure that realizes the rotation of the first locking guide rod and the second locking guide rod and limits the angle and direction of rotation, the rotatable device of the first locking guide rod and the second locking guide rod is on the side wall of the same side of the verification plate, a rotation locking plate is provided on the side wall of the verification plate, a first arc-shaped locking groove and a second arc-shaped locking groove are provided on the rotation locking plate, a first locking hole adapted to the first arc-shaped locking groove is provided on the first locking guide rod, a second locking hole adapted to the second arc-shaped locking groove is provided on the second locking guide rod, and locking bolts are provided on the first locking hole and the second locking hole.

[0011] In order to achieve the adjustable position of the first positioning rod and the second positioning rod on the first locking guide rod and the second locking guide rod to meet the requirements of different sizes, the first locking guide rod and the second locking guide rod are both provided with positioning blocks that can slide along them, and a positioning through hole is opened on the upper side wall of the positioning block. A positioning bolt with one end that can abut against the upper side wall of the first locking guide rod and the second locking guide rod is arranged in the positioning through hole; the first positioning rod and the second positioning rod are arranged on the positioning block.

[0012] In order to meet the verification requirements when the placement plate is assembled on the left slider or the right slider, the first positioning rod and the second positioning rod are both two-section types, each including a left positioning rod extending outward from the left side wall of the positioning block and a right positioning rod extending outward from the right side wall of the positioning block.

[0013] In order to achieve limiting, guide positioning grooves are provided on the left and right side walls of the first locking guide rod and the second locking guide rod. The left positioning rod and the right positioning rod pass through the positioning block at one end toward the positioning block and extend into the guide positioning groove, and are not connected to the bottom of the guide positioning groove.

[0014] Furthermore, the first locking guide rod and the second locking guide rod can both realize 180° rotation between the twelve o'clock position and the six o'clock position.

[0015] Furthermore, the outermost ends of the left positioning rod and the right positioning rod are both provided with a calibration tip adapted to the sensor to be calibrated.

[0016] In order to achieve reliable fixation of the touch sensor to be tested, the placement hole includes a middle socket, a bottom slot arranged below the middle socket, and upper slots arranged on the left and right sides above the middle socket. The middle socket, the bottom slot, the upper slot and the sensor to be tested are adapted.

[0017] The beneficial effects of the present invention are as follows: the required angle is adjusted by the cooperation of the rotatable first locking guide rod and the second locking guide rod, the size is adjusted by the position of the first positioning rod and the second positioning rod on the first locking guide rod and the second locking guide rod, and the spacing between the placement plate and the verification plate is adjusted by the slider that can slide along the guide rail, and the required position size is quickly positioned and locked. The existing verification fixture can only meet the needs of a single size, and multiple verification fixtures need to be prepared for products of different sizes to meet the verification needs, which has the problems of high cost, cumbersome verification and low efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 The figure is a schematic diagram of the structure of the present invention, in which the left side wall guide plate and related structures are omitted.

[0019] Figure 2 It is a schematic diagram of the positional relationship between the slider and the limit fixing seat. DETAILED DESCRIPTION

[0020] Examples, such as Figure 1 , Figure 2The shown embodiment is a fast calibration fixture for an EFI sensor, comprising a support plate 1, a linear guide rail 2 arranged on the support plate 1, a group of slide blocks 3 which can slide along the linear guide rail 2, one of the slide blocks 3 being provided with a placement plate 4, the placement plate 4 being provided with a placement hole which is compatible with the sensor 10 to be calibrated, one of the slide blocks 3 being provided with a calibration plate 5, the calibration plate 5 being provided with a rotatable first locking guide rod 6 and a second locking guide rod 7; the first locking guide rod 6 being provided with a position-adjustable first positioning rod 8, the second locking guide rod 7 being provided with a position-adjustable second positioning rod 9; the outermost ends of the first positioning rod 8 and the second positioning rod 9 are respectively adapted to the lowest point and the top point of the float of the sensor 10 to be calibrated.

[0021] In the description of the present invention, it should be understood that the terms "center", "lateral", "up", "down", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, which are only for the convenience of describing the present invention 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 therefore cannot be understood as a limitation on the present invention. In addition, the terms "first" and "second" are used only for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, unless otherwise specified, "multiple" means two or more. In addition, the term "including" and any variation thereof are intended to cover non-exclusive inclusions.

[0022] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0023] The terms used herein are only for describing specific embodiments and are not intended to limit exemplary embodiments. Unless the context clearly indicates otherwise, the singular forms "one", "one" and "one" used herein are also intended to include plural numbers. It should also be understood that the terms "include" and / or "comprise" used herein specify the existence of stated features, integers, steps, operations, units and / or components, without excluding the existence or addition of one or more other features, integers, steps, operations, units, components and / or combinations thereof.

[0024] The following combination Figure 1 , Figure 2 The concept of the present invention is further explained.

[0025] A fast calibration fixture for an EFI sensor comprises a support plate 1, a linear guide rail 2 arranged on the support plate 1, a group of slide blocks 3 which can slide along the linear guide rail 2 are arranged, one of the slide blocks 3 is provided with a placement plate 4, the placement plate 4 is provided with a placement hole which is matched with a sensor 10 to be calibrated, one of the slide blocks 3 is provided with a calibration plate 5, the calibration plate 5 is provided with a rotatable first locking guide rod 6 and a second locking guide rod 7; the first locking guide rod 6 is provided with a position-adjustable first positioning rod 8, the second locking guide rod 7 is provided with a position-adjustable second positioning rod 9; the outermost ends of the first positioning rod 8 and the second positioning rod 9 are respectively matched with the lowest point and the top point of the float of the sensor 10 to be calibrated.

[0026] The sliders 3 are provided with three, namely a left slider 31 , a right slider 32 , and a main slider 33 . The placement plate 4 is detachably mounted on one of the left slider 31 and the right slider 32 , and the check plate 5 is mounted on the main slider 33 .

[0027] A limit fixing seat 11 is provided on each slider 3, a limit plate 12 is provided on one side of the limit fixing seat 11, a limit hole 13 is provided on the limit plate 12, a limit groove adapted to the limit hole 13 is provided on the support plate 1, and a limit bolt is provided in the limit hole 13; the check plate 5 and the placement plate 4 are detachably mounted on the limit fixing seat 11. The check plate 5 and the placement plate 4 are arranged vertically upward. The limit groove can be multi-segment type or whole-segment type, and it is arranged in the same direction as the linear guide rail 2. In addition to setting the limit groove, the limit groove can also be not set, and the limit can be directly achieved by the cooperation of the limit bolt and the support plate 1.

[0028] A positioning seat 14 is provided at the bottom of the placement plate 4, and a placement groove 24 adapted to the upper end surface of the limiting fixing seat 11 is opened on the bottom surface of the positioning seat 14, and a first bolt assembly hole is opened on one side wall of the placement groove 24, and a second bolt assembly hole adapted to the first bolt transfer hole is opened on one side wall of the limiting fixing seat 11, and the first bolt assembly hole and the second bolt assembly hole are equipped with assembly bolts.

[0029] The first locking guide rod 6 and the second locking guide rod 7 are rotatably mounted on the left and right side walls of the check plate 5, respectively. The left and right side walls of the check plate 5 are also provided with left and right side wall guide plates 15 corresponding to the first locking guide rod 6 and the second locking guide rod 7. The left and right side wall guide plates 15 are both provided with arc-shaped guide grooves 16. The first locking guide rod 6 and the second locking guide rod 7 are provided with rotation positioning holes 17 adapted to the arc-shaped guide grooves 16. The rotation positioning holes 17 are provided with detachable locking bolts. The screw portion of the locking bolt is fixed in the rotation positioning hole 17 through the arc-shaped guide groove 16, and the nut portion thereof is mounted on the outer side wall of the arc-shaped guide groove 16. The left and right side wall guide plates 15 are both arc-shaped plates. The left and right side walls of the check plate 5 are provided with guide plate assembly columns 25 for mounting the left and right side wall guide plates 15. The left side wall guide plate and the right side wall guide plate 15 are detachably mounted on the guide plate mounting column 25 .

[0030] The first locking guide rod 6 and the second locking guide rod 7 are both sleeved with a positioning block 18 that can slide along them, and a positioning through hole 19 is opened on the upper side wall of the positioning block 18. A positioning bolt with one end that can abut against the upper side wall of the first locking guide rod 6 and the second locking guide rod 7 is arranged in the positioning through hole 19; the first positioning rod 8 and the second positioning rod 9 are installed on the positioning block 18.

[0031] The first positioning rod 8 and the second positioning rod 9 are both two-section types, and each includes a left positioning rod extending outward from the left side wall of the positioning block 18 and a right positioning rod extending outward from the right side wall of the positioning block 18 .

[0032] The left and right side walls of the first locking guide rod 6 and the second locking guide rod 7 are both provided with guide positioning grooves 20, and one end of the left positioning rod and the right positioning rod facing the positioning block passes through the positioning block and extends into the guide positioning groove 20, and is not connected to the bottom of the guide positioning groove; the first locking guide rod 6 and the second locking guide rod 7 can both realize 180° rotation between the twelve o'clock position and the six o'clock position; the outermost ends of the left positioning rod and the right positioning rod are provided with calibration tips adapted to the sensor 10 to be calibrated.

[0033] The first positioning rod 8 and the second positioning rod 9 are vertically arranged relative to the first locking guide rod 6 and the second locking guide rod 7 , and the placement plate 4 and the checking plate 5 are vertically arranged relative to the supporting plate 1 .

[0034] The placement hole includes a middle plug hole 21, a bottom slot 22 arranged below the middle plug hole 21, and upper slots 23 arranged on the left and right sides above the middle plug hole 21. The middle plug hole 21, the bottom slot 22, the upper slot 23 and the sensor 10 to be verified are adapted.

[0035] Embodiment 2, based on Embodiment 1, is different from the above-mentioned arrangement of the first locking guide rod 6 and the second locking guide rod 7. The arrangement can also be as follows: the first locking guide rod 6 and the second locking guide rod 7 are rotatably mounted on the same side wall of the check plate 5, a rotation locking plate is arranged on the side wall of the check plate 5, a first arc-shaped locking groove and a second arc-shaped locking groove are arranged on the rotation locking plate, a first locking hole matching the first arc-shaped locking groove is arranged on the first locking guide rod 6, a second locking hole matching the second arc-shaped locking groove is arranged on the second locking guide rod 7, and locking bolts are arranged on the first locking hole and the second locking hole. The rotation locking plate is an arc-shaped plate. The structures of the first arc-shaped locking groove and the second arc-shaped locking groove are the same as the arc-shaped guide groove in Embodiment 1.

[0036] Working principle: According to the direction of the sensor float rod to be calibrated, the installation plate is installed on the limit fixing seat on the left or right slide by assembling bolts, and then the spacing between the installation plate and the calibration plate is adjusted by sliding the left slider, the right slider, and the main slider according to the size of the product, and the positioning is achieved by tightening the limit bolts on the limit groove. The sensor to be calibrated is clamped on the installation plate through the installation hole. According to the size and rotation angle of the touch sensor to be calibrated, the angle is achieved by rotating the first locking guide rod and the second locking guide rod, and the angle is fixed by the locking bolt. The size is adjusted by adjusting the position of the first positioning rod and the second positioning rod on the first locking guide rod and the second locking guide rod, and the position is locked by the positioning bolt. Finally, the calibration tip at the top of the first positioning rod and the second positioning rod is adapted to the lowest point and the top point of the sensor float to be calibrated. Adjustment is made through the standard touch sensor, and the touch sensor can be calibrated after adjustment.

[0037] The above embodiments are not considered from a limiting point of view, but from an illustrative point of view. The scope of the present invention is determined by the scope of the claims, not the description, and should be interpreted as all differences within the scope of equivalence are included in the present invention. As long as various non-substantial improvements are made using the method concept and technical solution of the present invention; or the above concept and technical solution of the present invention are directly applied to other occasions without improvement, they are all within the scope of protection of the present invention.

Claims

1. A fast calibration fixture for an EFI sensor, characterized by: It includes a supporting plate, a linear guide rail arranged on the supporting plate, a group of sliding blocks which can slide along the linear guide rail are arranged, one of the sliding blocks is provided with a placement plate, the placement plate is provided with a placement hole which is matched with the sensor to be calibrated, one of the sliding blocks is provided with a verification plate, the verification plate is provided with a rotatable first locking guide rod and a second locking guide rod; the first locking guide rod is provided with a first positioning rod with adjustable position, and the second locking guide rod is provided with a second positioning rod with adjustable position; the outermost ends of the first positioning rod and the second positioning rod are respectively matched with the lowest point and the top point of the float of the sensor to be calibrated.

2. The fast calibration fixture for the EFI sensor according to claim 1 is characterized by: There are three sliders, namely a left slider, a right slider and a main slider. The placement plate is detachably mounted on one of the left slider and the right slider, and the check plate is mounted on the main slider.

3. The fast calibration fixture for the EFI sensor according to claim 1 or 2, characterized in that: A limit fixing seat is arranged on each slider, a limit plate is arranged on one side of the limit fixing seat, a limit hole is arranged on the limit plate, a limit groove matching the limit hole is arranged on the support plate, and a limit bolt is arranged in the limit hole; the check plate and the placement plate are detachably mounted on the limit fixing seat.

4. The fast calibration fixture for the EFI sensor according to claim 3 is characterized by: A positioning seat is arranged at the bottom of the placement plate, and a placement groove adapted to the upper end surface of the limiting fixing seat is opened on the bottom surface of the positioning seat, a first bolt assembly hole is opened on one side wall of the placement groove, and a second bolt assembly hole adapted to the first bolt transfer hole is opened on one side wall of the limiting fixing seat, and the first bolt assembly hole and the second bolt assembly hole are provided with assembly bolts.

5. The fast calibration fixture for the EFI sensor according to claim 1 is characterized by: The first locking guide rod and the second locking guide rod are rotatably installed on the left and right side walls of the verification plate respectively. The left and right side walls of the verification plate are also provided with a left wall guide plate and a right wall guide plate corresponding to the first locking guide rod and the second locking guide rod. The left wall guide plate and the right wall guide plate are both provided with an arc guide groove. The first locking guide rod and the second locking guide rod are provided with a rotation positioning hole adapted to the arc guide groove, and a detachable locking bolt is provided in the rotation positioning hole.

6. The fast calibration fixture for the EFI sensor according to claim 1 is characterized by: The first locking guide rod and the second locking guide rod are rotatably arranged on the side wall of the same side of the verification plate, a rotating locking plate is arranged on the side wall of the verification plate, a first arc-shaped locking groove and a second arc-shaped locking groove are arranged on the rotating locking plate, a first locking hole matching the first arc-shaped locking groove is arranged on the first locking guide rod, a second locking hole matching the second arc-shaped locking groove is arranged on the second locking guide rod, and locking bolts are arranged on both the first locking hole and the second locking hole.

7. The fast calibration fixture for the EFI sensor according to claim 5 or 6, characterized in that: The first locking guide rod and the second locking guide rod are both sleeved with positioning blocks that can slide along them, and a positioning through hole is opened on the upper side wall of the positioning block. A positioning bolt with one end that can abut against the upper side wall of the first locking guide rod and the second locking guide rod is arranged in the positioning through hole; the first positioning rod and the second positioning rod are installed on the positioning block.

8. The fast calibration fixture for the EFI sensor according to claim 7, characterized in that: The first positioning rod and the second positioning rod are both two-section types, and both include a left positioning rod extending outward from the left side wall of the positioning block and a right positioning rod extending outward from the right side wall of the positioning block.

9. The fast calibration fixture for the EFI sensor according to claim 8, characterized in that: The left and right side walls of the first locking guide rod and the second locking guide rod are provided with guide positioning grooves, and one end of the left positioning rod and the right positioning rod facing the positioning block passes through the positioning block and extends into the guide positioning groove, and is not connected to the bottom of the guide positioning groove; the first locking guide rod and the second locking guide rod can both realize 180° rotation between the twelve o'clock position and the six o'clock position; the outermost ends of the left positioning rod and the right positioning rod are provided with calibration tips adapted to the sensor to be calibrated.

10. The fast calibration fixture for the EFI sensor according to claim 9, characterized in that: The placement hole includes a central jack, a bottom slot arranged below the central jack, and upper slots arranged on the left and right sides above the central jack. The central jack, the bottom slot, the upper slot and the sensor to be verified are adapted.

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