CN112444179A - Sensor installation clearance measuring tool - Google Patents
Sensor installation clearance measuring tool Download PDFInfo
- Publication number
- CN112444179A CN112444179A CN202011191278.3A CN202011191278A CN112444179A CN 112444179 A CN112444179 A CN 112444179A CN 202011191278 A CN202011191278 A CN 202011191278A CN 112444179 A CN112444179 A CN 112444179A
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- Prior art keywords
- measuring
- sensor
- fixed
- rod
- positioning sleeve
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
- G01B5/00—Measuring arrangements characterised by the use of mechanical techniques
- G01B5/14—Measuring arrangements characterised by the use of mechanical techniques for measuring distance or clearance between spaced objects or spaced apertures
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
- G01B5/00—Measuring arrangements characterised by the use of mechanical techniques
- G01B5/02—Measuring arrangements characterised by the use of mechanical techniques for measuring length, width or thickness
- G01B5/06—Measuring arrangements characterised by the use of mechanical techniques for measuring length, width or thickness for measuring thickness
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N23/00—Cameras or camera modules comprising electronic image sensors; Control thereof
- H04N23/70—Circuitry for compensating brightness variation in the scene
- H04N23/74—Circuitry for compensating brightness variation in the scene by influencing the scene brightness using illuminating means
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N7/00—Television systems
- H04N7/18—Closed-circuit television [CCTV] systems, i.e. systems in which the video signal is not broadcast
- H04N7/183—Closed-circuit television [CCTV] systems, i.e. systems in which the video signal is not broadcast for receiving images from a single remote source
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- Engineering & Computer Science (AREA)
- Multimedia (AREA)
- Signal Processing (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- A Measuring Device Byusing Mechanical Method (AREA)
Abstract
The invention provides a sensor installation gap measuring tool, and belongs to the technical field of measuring structures. The sensor mounting clearance measurement tool includes a measurement assembly and an observation assembly. The measuring assembly comprises a positioning sleeve, a sensor body, a sensor positioning face, a measuring rod, a screw rod, a connecting rod, a sliding rail, a sliding block, scales, a sensor measuring head end face, an observation window and a gear transmission piece, wherein the sensor positioning face and the sensor measuring head end face are all arranged on the sensor body, when the measuring assembly is used, the distance between the sensor positioning face and the sensor measuring head end face is observed through the observation window and the scales, the distance between the sensor positioning face and the sensor measuring head end face is subtracted from the distance of downward movement of the lower end face of the measuring rod, and the distance is the thickness of a gasket required by the sensor body.
Description
Technical Field
The invention relates to the field of measurement structures, in particular to a sensor mounting gap measuring tool.
Background
When the engine works, the information such as the rotating speed of each moving part and the like, such as the rotating speed of a camshaft, needs to be detected by a sensor. In order to ensure the accuracy of detection, the gap between the end face of the sensor probe and the tooth crest height of the signal disc needs to be ensured to meet the design requirement (1mm +/-0.3 mm). If the technical requirements are not met, the gap is ensured by selecting sensor gaskets with different thicknesses.
At present, a current sensor installation clearance measuring tool, because the signal disc has been installed inside the part, the signal disc can not be observed to actual measurement, and during actual measurement, the inside dark of part, measuring tool are difficult to the accuracy and lean on signal disc addendum point, cause and measure inaccurately.
Disclosure of Invention
In order to make up for the above deficiency, the invention provides a sensor mounting clearance measuring tool, aiming at solving the problem of inaccurate measurement.
The invention is realized by the following steps:
the invention provides a sensor installation gap measuring tool which comprises a measuring assembly and an observation assembly.
The measuring component comprises a positioning sleeve, a sensor body, a sensor positioning surface, a measuring rod, a screw rod, a connecting rod, a slide rail, a slide block, scales, a sensor measuring head end surface, an observation window and a gear transmission part, wherein the sensor positioning surface and the sensor measuring head end surface are arranged on the sensor body, the sensor body is inserted into the positioning sleeve, the upper end of the screw rod rotates on the inner wall of the positioning sleeve, the connecting rod rotates on the positioning sleeve, the screw rod and the connecting rod are connected together through the gear transmission part in a transmission way, the slide rail is fixed on the inner wall of the positioning sleeve, the slide block slides on the slide rail, the measuring rod is sleeved on the screw rod in a threaded way, the side surface of the slide block and the outer wall of the measuring rod are fixed together, and the scales are respectively arranged on the positioning sleeve and the measuring rod, the observation window is arranged on the positioning sleeve.
The observation assembly comprises a camera, a button cell, a first protective cover and an LED lamp, a groove is formed in the measuring rod, the camera, the button cell, the first protective cover and the LED lamp are fixed on the inner wall of the groove, the button cell is arranged in the first protective cover, and the camera and the LED lamp are electrically connected together with the button cell.
In an embodiment of the present invention, the measuring assembly further includes a rotating member fixed on an inner wall of the positioning sleeve, and an upper end of the lead screw is fixed in the rotating member.
In an embodiment of the present invention, the measuring rod is provided with a thread groove, and the thread groove is threadedly sleeved on the screw rod.
In an embodiment of the present invention, the measuring assembly further includes a connecting column fixed on an inner wall of the positioning sleeve, and the connecting rod rotates on the connecting column.
In one embodiment of the invention, the connecting rod comprises a connecting rod body and a handheld part, the connecting rod body rotates on the positioning sleeve, and the handheld part is fixed at the end part of the connecting rod body.
In an embodiment of the invention, the slide rail comprises a slide rail body and a limiting block, the slide rail body is fixed on the inner wall of the positioning sleeve, and the limiting block is fixed at the end part of the slide rail body.
In an embodiment of the present invention, the measuring assembly further includes a limiting plate, and the limiting plate is fixed on an outer wall of the measuring rod.
In one embodiment of the present invention, the gear transmission comprises a first bevel gear and a second bevel gear, the first bevel gear is fixed on the screw rod, the second bevel gear is fixed on the connecting rod, and the first bevel gear and the second bevel gear are meshed.
In one embodiment of the present invention, the first shield includes a first shield body and a connection ear plate, the connection ear plate is fixed on an outer wall of the first shield body, and the connection ear plate is fixed on an inner wall of the groove.
In an embodiment of the invention, the LED lamp includes an LED lamp body and a second protective outer cover, the LED lamp body and the second protective outer cover are both fixed on the inner wall of the groove, and the LED lamp body is disposed in the second protective outer cover.
The invention has the beneficial effects that: the invention obtains a sensor mounting clearance measuring tool through the design, when in use, the camera and the LED lamp are turned on, the camera is connected to a display through a data line, the sensor body is inserted into the through hole of the positioning sleeve, the lower surface of the positioning surface of the sensor is tightly attached to the upper surface of the positioning sleeve, the positioning sleeve is held by hands, the measuring rod is inserted into the mounting hole of the sensor body of the part, the lower end surface of the measuring rod is tightly attached to the mounting plane of the mounting sensor body of the part, at the moment, the scale of the contact position of the measuring rod and the positioning sleeve is marked through the scale, the LED lamp illuminates the inside of the part, the camera transmits the internal picture of the part to the display, an operator rotates the connecting rod by observing the display, the lower end surface of the measuring rod is tangent to the addendum height point of the signal disc, at the moment, the scale of the contact position of the measuring rod, the distance that the terminal surface moved down under the measuring stick is promptly subtracted between the two, through observation window and scale observation sensor locating surface and the sensor gauge head terminal surface between the distance that the terminal surface moved down under the measuring stick subtracts the distance between sensor locating surface and the sensor gauge head terminal surface and is the thickness of the required gasket of sensor body, this measuring tool has effectually solved the inside dark of part, inconvenient lower terminal surface that makes the measuring stick and the problem that the signal disc addendum point is tangent together, great improvement measuring accuracy.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings that are required to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present invention and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained according to the drawings without inventive efforts.
Fig. 1 is a schematic structural diagram of a sensor mounting gap measuring tool according to an embodiment of the present invention;
FIG. 2 is a schematic cross-sectional view of a sensor mounting gap measuring tool according to an embodiment of the present invention;
FIG. 3 is a schematic structural diagram of a sensor body according to an embodiment of the present invention;
FIG. 4 is a schematic cross-sectional view of a measurement assembly according to an embodiment of the present invention;
fig. 5 is an enlarged view of the area a in fig. 4 according to an embodiment of the present invention.
In the figure: 100-a measurement component; 110-a positioning sleeve; 120-a sensor body; 130-a sensor positioning surface; 140-a measuring rod; 150-a rotating member; 160-a screw rod; 170-thread groove; 180-connecting column; 190-connecting rods; 1901-connecting rod body; 1902-a hand-held part; 191-a slide rail; 1911-a sliding rail body; 1912-a limiting block; 192-a slider; 193-a limiting plate; 194-graduation; 195-a sensor probe end face; 196-observation window; 197-a gear drive; 1971-first bevel gear; 1972-second bevel gear; 200-a viewing assembly; 210-a groove; 220-a camera; 230-a button cell; 240-a first shield; 241-a first shield body; 242-connecting ear plate; 250-LED lamps; 251-an LED lamp body; 252-a second protective outer cover.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention more apparent, the technical solutions of the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings of the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all embodiments of the present invention. All other embodiments, which can be obtained by a person skilled in the art without any inventive step based on the embodiments of the present invention, are within the scope of the present invention.
Thus, the following detailed description of the embodiments of the present invention, presented in the figures, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. All other embodiments, which can be obtained by a person skilled in the art without any inventive step based on the embodiments of the present invention, are within the scope of the present invention.
It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures.
In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", and the like, indicate orientations and positional relationships based on those shown in the drawings, and are used only for convenience of description and simplicity of description, and do not indicate or imply that the equipment or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be considered as limiting the present invention.
Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless specifically defined otherwise.
In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can, for example, be fixedly connected, detachably connected, or integrally formed; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
In the present invention, unless otherwise expressly stated or limited, "above" or "below" a first feature means that the first and second features are in direct contact, or that the first and second features are not in direct contact but are in contact with each other via another feature therebetween. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or simply meaning that the first feature is at a lesser elevation than the second feature.
Examples
Referring to fig. 1-5, the present invention provides a technical solution: a sensor mounting clearance measurement tool includes a measurement assembly 100 and a viewing assembly 200. The observation assembly 200 is fixed on the measuring assembly 100, so that the measuring accuracy is greatly improved.
Referring to fig. 1 to 4, the measuring assembly 100 includes a positioning sleeve 110, a sensor body 120, a sensor positioning surface 130, a measuring rod 140, a lead screw 160, a connecting rod 190, a sliding rail 191, a sliding block 192, a scale 194, a sensor measuring head end surface 195, an observation window 196 and a gear transmission member 197, the sensor positioning surface 130 and the sensor measuring head end surface 195 are both disposed on the sensor body 120, the sensor body 120 is inserted into the positioning sleeve 110, the upper end of the lead screw 160 rotates on the inner wall of the positioning sleeve 110, the measuring assembly 100 further includes a rotating member 150, the rotating member 150 is fixed on the inner wall of the positioning sleeve 110 by screws, the upper end of the lead screw 160 is keyed on the rotating member 150, the rotating member 150 enables the lead screw 160 to rotate more stably, the rotating member 150 in this embodiment is a bearing, the connecting rod 190 rotates on the positioning sleeve 110, the measuring assembly 100 further includes a connecting post 180, the connecting rod 190 rotates on the connecting post 180, and the connecting post 180 enables the connecting rod 190 to rotate more stably.
The connecting rod 190 comprises a connecting rod body 1901 and a hand portion 1902, the connecting rod body 1901 rotates on the positioning sleeve 110, the hand portion 1902 is welded at the end of the connecting rod body 1901, the hand portion 1902 facilitates rotation of the connecting rod body 1901, the hand portion 1902 in this embodiment is a hand wheel, the screw rod 160 and the connecting rod 190 are drivingly connected together through a gear transmission 197, the gear transmission 197 comprises a first bevel gear 1971 and a second bevel gear 1972, the first bevel gear 1971 is welded on the screw rod 160, the second bevel gear 1972 is welded on the connecting rod 190, the first bevel gear 1971 is meshed with the second bevel gear 1972, and the first bevel gear 1971 and the second bevel gear 1972 enable the screw rod 160 and the connecting rod 190 to synchronously rotate.
The slide rail 191 is welded on the inner wall of the positioning sleeve 110, the slider 192 slides on the slide rail 191, the slide rail 191 comprises a slide rail body 1911 and a limiting block 1912, the slide rail body 1911 is welded on the inner wall of the positioning sleeve 110, the limiting block 1912 is welded at the end of the slide rail body 1911, the limiting block 1912 effectively prevents the slider 192 from sliding out of the slide rail body 1911, the measuring assembly 100 further comprises a limiting plate 193, the limiting plate 193 is welded on the outer wall of the measuring rod 140, the limiting plate 193 prevents the measuring rod 140 from sliding out of the screw rod 160, the measuring rod 140 is in threaded fit with the screw rod 160, the measuring rod 140 is provided with a threaded groove 170 on the measuring rod 140, the threaded groove 170 is in threaded fit with the screw rod 160, the side surface of the slider 192 and the outer wall of the measuring rod 140 are welded together, the scales 194 are respectively arranged on the positioning sleeve 110 and the measuring rod.
Referring to fig. 2 and 5, the observation assembly 200 includes a camera 220, a button cell 230, a first protective cover 240 and an LED lamp 250, the measuring rod 140 is provided with a groove 210, the camera 220, the button cell 230, the first protective cover 240 and the LED lamp 250 are all fixed on an inner wall of the groove 210 by screws, the first protective cover 240 includes a first protective cover body 241 and a connecting ear plate 242, the connecting ear plate 242 is welded on an outer wall of the first protective cover body 241, the connecting ear plate 242 is fixed on an inner wall of the groove 210 by screws, the connecting ear plate 242 facilitates mounting and fixing the first protective cover body 241, the LED lamp 250 includes an LED lamp body 251 and a second protective outer cover 252, the LED lamp body 251 and the second protective outer cover 252 are both fixed on an inner wall of the groove 210 by screws, the LED lamp body 251 is disposed in the second protective outer cover 252, the second protective outer cover 252 protects the LED lamp body 251 from dust erosion, the button battery 230 is disposed in the first protective cover 240, and the camera 220 and the LED lamp 250 are electrically connected to the button battery 230.
Specifically, the working principle of the sensor mounting clearance measuring tool is as follows: when the device is used, the camera 220 and the LED lamp 250 are turned on, the camera 220 is connected to a display through a data line, the sensor body 120 is inserted into a through hole of the positioning sleeve 110, the lower surface of the sensor positioning surface 130 is tightly attached to the upper surface of the positioning sleeve 110, the positioning sleeve 110 is held by a hand, the measuring rod 140 is inserted into a mounting hole of the sensor body 120 of a part, the lower end surface of the measuring rod 140 is tightly attached to a mounting plane of the sensor body 120 of the part, at the moment, the scale of the contact position of the measuring rod 140 and the positioning sleeve 110 is recorded through the scale 194, the connecting rod 190 is rotated, the gear transmission piece 197 is rotated by the rotation of the connecting rod 190, the screw 160 is rotated by the rotation of the gear transmission piece 197, the measuring rod 140 moves upwards or downwards under the combined action of the sliding rail 191, the sliding block 192 and the screw 160, the LED lamp 250 illuminates the inside of the part, the camera 220 transmits the internal, an operator can make the lower end surface of the measuring rod 140 tangent with the addendum point of the signal disc by observing the rotary connecting rod 190 of the display, at the moment, the scales of the contact positions of the measuring rod 140 and the positioning sleeve 110 are recorded again, the subtraction of the scales is the downward moving distance of the lower end surface of the measuring rod 140, the distance between the positioning surface 130 of the sensor and the measuring head end surface 195 of the sensor is observed through the observation window 196 and the scales 194, the downward moving distance of the lower end surface of the measuring rod 140 is the thickness of the gasket required by the sensor body 120 by subtracting the distance between the positioning surface 130 of the sensor and the measuring head end surface 195 of the sensor, the measuring tool effectively solves the problem that the inside of parts is dark, the lower end surface of the measuring rod 140 is difficult to be tangent with the add.
It should be noted that the specific model specifications of the sensor body 120, the camera 220, the button cell 230, and the LED lamp 250 need to be determined by type selection according to the actual specification of the device, and the specific type selection calculation method adopts the prior art, so detailed description is omitted.
The power supply of the sensor body 120, the camera 220, the button battery 230, and the LED lamp 250 and the principle thereof will be apparent to those skilled in the art and will not be described in detail herein.
The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (10)
1. A sensor mounting clearance measuring tool is characterized by comprising
The measuring component (100) comprises a positioning sleeve (110), a sensor body (120), a sensor positioning surface (130), a measuring rod (140), a screw rod (160), a connecting rod (190), a sliding rail (191), a sliding block (192), scales (194), a sensor measuring head end surface (195), an observation window (196) and a gear transmission piece (197), wherein the sensor positioning surface (130) and the sensor measuring head end surface (195) are arranged on the sensor body (120), the sensor body (120) is inserted into the positioning sleeve (110), the upper end of the screw rod (160) rotates on the inner wall of the positioning sleeve (110), the connecting rod (190) rotates on the positioning sleeve (110), the screw rod (160) and the connecting rod (190) are connected together in a transmission way through the gear transmission piece (197), and the sliding rail (191) is fixed on the inner wall of the positioning sleeve (110), the sliding block (192) slides on the sliding rail (191), the measuring rod (140) is sleeved on the screw rod (160) in a threaded mode, the side surface of the sliding block (192) is fixed with the outer wall of the measuring rod (140), the scales (194) are respectively arranged on the positioning sleeve (110) and the measuring rod (140), and the observation window (196) is arranged on the positioning sleeve (110);
the observation assembly (200) comprises a camera (220), a button cell (230), a first protective cover (240) and an LED lamp (250), a groove (210) is formed in the measuring rod (140), the camera (220), the button cell (230), the first protective cover (240) and the LED lamp (250) are fixed on the inner wall of the groove (210), the button cell (230) is arranged in the first protective cover (240), and the camera (220) and the LED lamp (250) are electrically connected with the button cell (230).
2. A sensor mounting clearance measuring tool according to claim 1, wherein the measuring unit (100) further comprises a rotating member (150), the rotating member (150) is fixed to an inner wall of the positioning sleeve (110), and an upper end of the screw shaft (160) is fixed in the rotating member (150).
3. The tool for measuring the mounting clearance of the sensor as claimed in claim 1, wherein the measuring rod (140) is provided with a thread groove (170), and the thread groove (170) is threaded on the screw rod (160).
4. A sensor mounting gap measuring tool according to claim 1, wherein the measuring assembly (100) further comprises a connecting post (180), the connecting post (180) is fixed on the inner wall of the positioning sleeve (110), and the connecting rod (190) rotates on the connecting post (180).
5. A sensor mounting clearance measuring tool in accordance with claim 1, wherein the connecting rod (190) comprises a connecting rod body (1901) and a hand grip (1902), the connecting rod body (1901) being rotated on the positioning sleeve (110), the hand grip (1902) being fixed to an end of the connecting rod body (1901).
6. A sensor mounting gap measuring tool according to claim 1, wherein the rail (191) comprises a rail body (1911) and a stopper (1912), the rail body (1911) is fixed to the inner wall of the positioning sleeve (110), and the stopper (1912) is fixed to the end of the rail body (1911).
7. A sensor mounting clearance measuring tool according to claim 1, wherein the measuring assembly (100) further comprises a stopper plate (193), the stopper plate (193) being fixed on an outer wall of the measuring rod (140).
8. A sensor mounting clearance measuring tool according to claim 1, wherein the gear transmission (197) includes a first bevel gear (1971) and a second bevel gear (1972), the first bevel gear (1971) being fixed to the screw rod (160), the second bevel gear (1972) being fixed to the connecting rod (190), the first bevel gear (1971) and the second bevel gear (1972) being engaged.
9. A sensor mounting gap measuring tool according to claim 1, wherein the first shield (240) includes a first shield body (241) and a connection lug plate (242), the connection lug plate (242) is fixed on an outer wall of the first shield body (241), and the connection lug plate (242) is fixed on an inner wall of the groove (210).
10. A sensor mounting gap measuring tool according to claim 1, wherein the LED lamp (250) comprises an LED lamp body (251) and a second protective housing (252), the LED lamp body (251) and the second protective housing (252) are both fixed on the inner wall of the recess (210), the LED lamp body (251) is provided inside the second protective housing (252).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011191278.3A CN112444179A (en) | 2020-10-30 | 2020-10-30 | Sensor installation clearance measuring tool |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011191278.3A CN112444179A (en) | 2020-10-30 | 2020-10-30 | Sensor installation clearance measuring tool |
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| Publication Number | Publication Date |
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| CN112444179A true CN112444179A (en) | 2021-03-05 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202011191278.3A Pending CN112444179A (en) | 2020-10-30 | 2020-10-30 | Sensor installation clearance measuring tool |
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| CN (1) | CN112444179A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112963245A (en) * | 2021-03-16 | 2021-06-15 | 潍柴动力股份有限公司 | Engine speed sensor air gap control device and control method |
-
2020
- 2020-10-30 CN CN202011191278.3A patent/CN112444179A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112963245A (en) * | 2021-03-16 | 2021-06-15 | 潍柴动力股份有限公司 | Engine speed sensor air gap control device and control method |
| CN112963245B (en) * | 2021-03-16 | 2021-12-21 | 潍柴动力股份有限公司 | Engine speed sensor air gap control device and control method |
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