CN110906854B - Carbon slide thickness measuring device based on eddy current sensor - Google Patents
Carbon slide thickness measuring device based on eddy current sensor Download PDFInfo
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- CN110906854B CN110906854B CN201911056541.5A CN201911056541A CN110906854B CN 110906854 B CN110906854 B CN 110906854B CN 201911056541 A CN201911056541 A CN 201911056541A CN 110906854 B CN110906854 B CN 110906854B
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- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 title claims abstract description 71
- 229910052799 carbon Inorganic materials 0.000 title claims abstract description 69
- 230000006698 induction Effects 0.000 claims abstract description 17
- 239000000523 sample Substances 0.000 claims abstract description 16
- 238000012545 processing Methods 0.000 claims abstract description 4
- 230000004044 response Effects 0.000 claims description 7
- 238000006243 chemical reaction Methods 0.000 claims description 5
- HEZMWWAKWCSUCB-PHDIDXHHSA-N (3R,4R)-3,4-dihydroxycyclohexa-1,5-diene-1-carboxylic acid Chemical group O[C@@H]1C=CC(C(O)=O)=C[C@H]1O HEZMWWAKWCSUCB-PHDIDXHHSA-N 0.000 claims description 4
- 229910000831 Steel Inorganic materials 0.000 claims description 3
- 239000010959 steel Substances 0.000 claims description 3
- 238000012360 testing method Methods 0.000 abstract description 19
- 238000003860 storage Methods 0.000 abstract description 4
- 238000005259 measurement Methods 0.000 abstract description 3
- 238000004458 analytical method Methods 0.000 abstract description 2
- 238000000034 method Methods 0.000 description 8
- 230000008569 process Effects 0.000 description 7
- 238000010586 diagram Methods 0.000 description 5
- 230000008859 change Effects 0.000 description 4
- 238000012423 maintenance Methods 0.000 description 4
- 230000009471 action Effects 0.000 description 3
- 230000002349 favourable effect Effects 0.000 description 3
- 230000003137 locomotive effect Effects 0.000 description 3
- 238000007789 sealing Methods 0.000 description 3
- 238000004891 communication Methods 0.000 description 2
- 238000001514 detection method Methods 0.000 description 2
- 230000005611 electricity Effects 0.000 description 2
- 229910002804 graphite Inorganic materials 0.000 description 2
- 239000010439 graphite Substances 0.000 description 2
- 239000004973 liquid crystal related substance Substances 0.000 description 2
- 229910052751 metal Inorganic materials 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 230000002035 prolonged effect Effects 0.000 description 2
- 239000004065 semiconductor Substances 0.000 description 2
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- 230000002159 abnormal effect Effects 0.000 description 1
- 239000000956 alloy Substances 0.000 description 1
- 229910045601 alloy Inorganic materials 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- 238000013523 data management Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000008092 positive effect Effects 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 230000002633 protecting effect Effects 0.000 description 1
- 230000001012 protector Effects 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 230000035945 sensitivity Effects 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
Classifications
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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
- G01B7/00—Measuring arrangements characterised by the use of electric or magnetic techniques
- G01B7/02—Measuring arrangements characterised by the use of electric or magnetic techniques for measuring length, width or thickness
- G01B7/06—Measuring arrangements characterised by the use of electric or magnetic techniques for measuring length, width or thickness for measuring thickness
- G01B7/10—Measuring arrangements characterised by the use of electric or magnetic techniques for measuring length, width or thickness for measuring thickness using magnetic means, e.g. by measuring change of reluctance
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
- G01B11/00—Measuring arrangements characterised by the use of optical techniques
- G01B11/02—Measuring arrangements characterised by the use of optical techniques for measuring length, width or thickness
- G01B11/06—Measuring arrangements characterised by the use of optical techniques for measuring length, width or thickness for measuring thickness ; e.g. of sheet material
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Measurement Of Length, Angles, Or The Like Using Electric Or Magnetic Means (AREA)
Abstract
The invention provides a carbon slide plate thickness measuring device based on an eddy current sensor, which belongs to the field of measuring equipment and comprises a probe assembly and a monitor, wherein the probe assembly comprises a support, a slide block and a sensor, the support is of a vertically arranged groove structure, the slide block is arranged in the support and is arranged in a vertically moving way relative to the support, a spring for enabling the slide block to move downwards is arranged between the slide block and the lower end face of the support, an induction piece is arranged at the upper end of the slide block, a position avoidance hole is arranged in a region corresponding to the support and the induction piece, the sensor is arranged relative to the induction piece and detects the upper position and the lower position of the induction piece, and the sensor is electrically connected with the monitor and is used for receiving, processing and displaying data. The invention can rapidly test the thickness parameters of the carbon slide plate at different positions, can display and output data, has more intelligent and automatic measurement, better precision and readiness, and is convenient for storage and subsequent analysis.
Description
Technical Field
The invention belongs to the field of measuring equipment, relates to thickness detection of parts, and particularly relates to a carbon slide plate thickness test on a pantograph on a railway.
Background
The device for connecting the train and the high-voltage line is named as a pantograph, the pantograph is continuously worn when the train runs, the pantograph heads of the pantograph are provided with a plurality of detachable carbon or powder alloy conductive sliding plates which are used for being contacted with a contact net to take electricity from the upper surface, the sliding plates are soft in texture, so that the main loss is on the sliding plates when the contact net rubs, the wear of the contact net wire is quite small, the contact net wire is only required to be replaced in maintenance of a daily locomotive when the sliding plates wear to a limited extent, the contact net wire is troublesome, but the sliding plates are always more difficult than the replacement of the contact net wire, the sliding plates are usually made of graphite, the graphite wear is faster, the carbon sliding plates are required to be replaced periodically, the replacement is convenient and feasible, the cost is low, the sliding plates are mainly composed of aluminum plates and carbon layers, the carbon layers are contacted with wires to introduce current into the locomotive in the operation process of the locomotive to supply electricity, the thickness of the carbon layers is reduced after the contact net is worn, and the thickness of the carbon layers is required to be replaced when the thickness of the current detection is less than 5 mm.
The thickness of the carbon slide plate is a main parameter for determining whether the carbon slide plate needs to be replaced or not, if the thinnest part of the carbon slide plate does not meet the use specification, the carbon slide plate needs to be replaced, so that the accurate measurement of the thinnest thickness of the carbon slide plate is important, the carbon slide plate is replaced less than a certain thickness, the replacement is frequent, the safety is improved, but the cost is increased, the raw materials are wasted, but more serious potential safety hazards exist if the carbon slide plate is not replaced on time, in the current stage, railway service section staff mainly measure the thickness of the carbon slide plate by using a vernier caliper, then test data are recorded, human errors exist, only point position tests can be carried out, and the thinnest position of the carbon slide plate is determined visually.
Through searching the literature, a special tool for testing the thickness of the carbon sliding plate of the pantograph is found, a groove with a gradually increased section and scales is arranged, and the method is low in efficiency, low in precision and poor in accuracy, measures discontinuous in size, has the influence of human factors and potential safety hazard, and is not suitable for the rapid development of electrified railways, and the section of the groove is gradually increased.
Disclosure of Invention
The invention aims to provide the thickness measuring device for the carbon slide plate based on the eddy current sensor, which can rapidly test the thickness parameters of the carbon slide plate at different positions, can display and output data, has more intelligent and automatic measurement, better precision and readiness, and is convenient for storage and subsequent analysis.
In order to solve the technical problems, the invention adopts the following technical scheme: the carbon slide plate thickness measuring device based on the eddy current sensor comprises a probe assembly and a monitor, wherein the probe assembly comprises a support, a slide block and a sensor, the support is of a vertically arranged groove structure, the slide block is arranged in the support and moves up and down relative to the support, a spring enabling the slide block to move downwards is arranged between the slide block and the lower end face of the support, an induction plate is arranged at the upper end of the slide block, a clearance hole is formed in a region, corresponding to the induction plate, of the support, the sensor is arranged relative to the induction plate and detects the upper position and the lower position of the induction plate, and the sensor is electrically connected with the monitor;
the monitor is used for receiving, processing and displaying data.
Further, the middle part of the lower end of the sliding block is embedded with a first universal ball bearing, the lower end face of the first universal ball bearing is lower than the lower end of the sliding block, the lower end face of the support is embedded with a plurality of second universal ball bearings, the upper end face of the second universal ball bearing is higher than the upper end face of the support, and the first universal ball bearing is arranged right above a plurality of areas formed by the second universal ball bearings.
Further, the support includes bottom plate, riser and roof, keep away the position hole and establish on the roof, the section of riser is the slot shape and the opening orientation the slider sets up, the slider with be equipped with the fixed plate between the riser, the fixed plate with riser fixed connection, the slider with the fixed plate passes through line rail sliding connection from top to bottom, the spring is established the slider with between the bottom plate and to the slider has pulling force, the one end of spring with bottom plate fixed connection, the other end with the lower extreme fixed connection of slider.
Further, the upper end of support has set firmly the top cap, the sensor inlays to be established the lower extreme of top cap, the top cap is close to the one end of support is equipped with first wire casing, the upper end of support is equipped with the second wire casing, first wire casing and second wire casing correspond from top to bottom and set up, first wire casing with the signal line of sensor corresponds the setting.
Further, the slider is T shape and wider one end with the support cooperation sets up, the response piece is the steel sheet of No. 45, response piece, slider keep away from the one end of support with support parallel and level sets up, response piece length direction's both ends are the arc.
Further, the sensor is an eddy current sensor or a laser distance sensor, and the sensor is of a flat T-shaped structure and is provided with a third wire slot at the upper end.
Further, the sensor is a wide-range ranging eddy current sensor, the diameter is 25mm, the measuring range is 20mm, the precision is +/-1.5%, the monitor comprises a front-end processor, and the front-end processor is a small-size front-end processor matched with the sensor.
Further, the monitor includes a processor that performs an analog-to-digital conversion and obtains a value of the distance between the sensor and the sensing tile, the processor selecting the STM32F103 series 32-bit processor.
Further, the monitor comprises a display screen and a film button, wherein the display screen is used for displaying texts and curves formed by data processed by the processor, and the film button is used for inputting parameters and controlling flow.
Further, the monitor further comprises a power supply circuit, a CAN interface and an SD card interface circuit, wherein the power supply circuit is a DCDC power converter, the CAN interface is used for uploading the thickness information of the carbon skateboard collected by the equipment to a third party collection control system, and the SD card interface circuit is used for storing the collected thickness information of the carbon skateboard into an SD card and storing the thickness information in an EXCEL document mode.
Compared with the prior art, the invention has the following advantages and positive effects.
1. The carbon slide plate is positioned between the slide block and the lower end face of the bracket, the slide block and the carbon slide plate are always in a bonding state under the action of the spring, the probe assembly is moved from one end of the carbon slide block to the other end, the upper and lower positions of the slide block are different at different thickness positions, the upper and lower positions of the sensing piece are further driven to change, the sensor receives corresponding data signals and processes the corresponding data signals, the corresponding thickness data are converted into corresponding thickness data and displayed, meanwhile, the SD card interface circuit is arranged in the monitor, so that the data are conveniently exported and stored, the automatic storage and display of the data in the measuring process are realized, the labor efficiency is improved, the testing precision is improved, the labor intensity is reduced, the testing precision is improved, the carbon slide block can be replaced in a more accurate range, the safety is ensured without waste, and the maintenance cost is reduced;
2. after the first universal bearing and the second universal bearing are arranged, the contact area between the first universal bearing and the carbon slide block is reduced, so that the first universal bearing and the second universal bearing are in point contact with the carbon slide block, friction force is reduced, a probe assembly can be conveniently and rapidly moved on the carbon slide block, labor intensity is reduced, and testing is more convenient and quicker;
3. the structure of the top cover is arranged, so that the sensor is protected, the damage of the external environment to the sensor assembly is avoided, the service life of the sensor is greatly prolonged, the signal wires of the sensor are facilitated to pass through after the first wire slot and the second wire slot are arranged, and certain guiding and protecting effects are realized, so that the wire outlet is convenient and more standardized;
4. The sensor is of a flat T-shaped structure, is of a relatively common cylindrical structure, occupies smaller space, is more compact in overall structure, occupies smaller space, is convenient to take and put, and is attractive in overall appearance.
Drawings
The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the invention. In the drawings:
FIG. 1 is a schematic diagram of the structure of the carbon slide plate thickness measuring device based on the eddy current sensor in left view.
FIG. 2 is a schematic diagram of the structure of the carbon slide plate thickness measuring device based on the eddy current sensor in the right side view.
FIG. 3 is a longitudinal cross-sectional view of the carbon sled thickness measuring apparatus of the present invention based on an eddy current sensor.
FIG. 4 is a schematic rear view of the carbon slide thickness measuring device based on the eddy current sensor.
Fig. 5 is a schematic structural view of the stent of the present invention.
FIG. 6 is a schematic view of the structure of the top cover of the present invention;
FIG. 7 is a schematic top view of the sensor of the present invention;
FIG. 8 is a schematic view of the sensor of the present invention in a bottom view;
FIG. 9 is a front view of the monitor of the present invention;
FIG. 10 is a schematic circuit diagram of a probe assembly of the present invention;
FIG. 11 is a schematic circuit diagram of a display screen of the present invention;
FIG. 12 is a schematic circuit diagram of a power supply circuit of the present invention;
FIG. 13 is a circuit schematic of the CAN interface circuit of the invention;
Fig. 14 is a circuit schematic of the SD card interface circuit of the present invention.
Reference numerals:
11. A bracket; 111. a second universal bearing; 112. a bottom plate; 113. a riser; 114. a top plate; 1141. a second wire slot; 115. a clearance hole; 12. a slide block; 121. a first universal bearing; 13. an induction piece; 14. a top cover; 141. a first wire chase; 15. a fixing plate; 16. a lifting plate; 17. a sensor; 171. a third wire chase; 172. a threading hole; 173. sealing grooves; 18. a spring; 21. a housing; 22. corner protection; 23. a first air joint; 24. a second air joint; 25. a charging connector; 26. a display screen; 27. a film key; 28. a handle.
Detailed Description
It should be noted that, without conflict, the embodiments of the present invention and features of the embodiments may be combined with each other.
In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, are merely for convenience in describing the present invention and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first", "a second", etc. may explicitly or implicitly include one or more such feature. In the description of the present invention, unless otherwise indicated, the meaning of "a plurality" is two or more.
In the description of the present invention, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art in a specific case.
Specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings.
As shown in fig. 1 to 9, the application discloses a carbon slide plate thickness measuring device based on an eddy current sensor, which comprises a probe assembly and a monitor, wherein the probe assembly comprises a bracket 11, a slide block 12 and a sensor 17, the bracket 11 is of a vertically arranged groove structure, the slide block 12 is arranged in the bracket 11 and is arranged in a vertically moving way relative to the bracket 11, a spring 18 for enabling the slide block 12 to move downwards is arranged between the slide block 12 and the lower end surface of the bracket 11, an induction plate 13 is arranged at the upper end of the slide block 12, a position avoiding hole 115 is arranged in a region of the bracket 11 corresponding to the induction plate 13, the sensor 17 is arranged relative to the induction plate 13 and detects the upper position and the lower position of the induction plate 13, and the sensor 17 is electrically connected with the monitor; the monitor is used for receiving, processing and displaying data, the carbon slide plate is positioned between the slide block 12 and the lower end face of the bracket 11, the slide block 12 and the carbon slide plate are always in a joint state under the action of the spring 18, the probe assembly is moved from one end of the carbon slide block 12 to the other end, the upper and lower positions of the slide block 12 are different at different thickness positions, the upper and lower positions of the sensing piece 13 are further driven to change, the sensor 17 receives and processes corresponding data signals and converts the corresponding thickness data into corresponding thickness data for displaying, meanwhile, an SD card interface circuit is arranged in the monitor, so that the data is conveniently led out and stored, the automatic storage and display of the data in the measuring process are realized, the labor efficiency is improved, the testing precision is improved, the labor intensity is reduced, the testing precision is improved, the carbon slide block 12 can be replaced in a more accurate range, the safety is not wasted, the maintenance cost is reduced, the use amount of the carbon slide block 12 for a railway production line is huge, the cost change of each carbon slide block 12 affects the huge cost change, the tiny technological breakthrough in the prior art is realized, the accurate and the accurate maintenance period is greatly reduced.
Preferably, the lower extreme middle part of slider 12 inlays and is equipped with first universal ball bearing, the lower terminal surface of first universal ball bearing is less than the lower extreme setting of slider 12, inlay on the lower terminal surface of support 11 and be equipped with a plurality of second universal ball bearings, the up end of second universal ball bearing is higher than the up end setting of support 11, first universal ball bearing establishes directly over the region that a plurality of second universal ball bearings formed, set up first universal ball bearing 121 and second universal ball bearing 111, reduce the area of contact with carbon slider 12, make both be the point contact with carbon slider 12, reduce frictional force, make things convenient for the quick removal of probe subassembly on carbon slider 12, reduce intensity of labour, make the test more convenient and swift.
Preferably, the bracket 11 includes a bottom plate 112, a vertical plate 113 and a top plate 114, the avoidance hole 115 is formed on the top plate 114, the section of the vertical plate 113 is groove-shaped and is opened towards the slide block 12, a fixed plate 15 is arranged between the slide block 12 and the vertical plate 113, the fixed plate 15 is fixedly connected with the vertical plate 113, a lifting plate 16 is arranged between the slide block 12 and the fixed plate 15, the lifting plate 16 and the fixed plate 15 are vertically and slidably connected through a linear rail, the slide block 12 is arranged at the upper end of the lifting plate 16, the spring 18 is arranged between the lifting plate 16 and the bottom plate 112 and has a tensile force on the slide block 12, one end of the spring 18 is fixedly connected with the bottom plate 112, the other end of the spring is fixedly connected with the lower end of the lifting plate 16, the bracket 11 structure ensures the accuracy of the up-down movement of the slide block 12, and further ensures the test accuracy.
Preferably, the upper end of support 11 has set firmly top cap 14, sensor 17 inlays the lower extreme of establishing at top cap 14, the one end that top cap 14 is close to support 11 is equipped with first wire casing 141, the upper end of support 11 is equipped with second wire casing 1141, first wire casing 141 and second wire casing 1141 correspond the setting from top to bottom, first wire casing 141 corresponds the setting with the signal line of sensor 17, set up the structure of top cap 14, play the effect of protection to sensor 17, avoid external environment to the damage to sensor 17 assembly, the life of sensor 17 has been prolonged greatly, behind first wire casing 141 and second wire casing 1141, be favorable to the signal line of sensor 17 to pass through, have certain direction and guard action, make the wire outlet convenient and more regular.
Preferably, slider 12 is T shape and wider one end and support 11 cooperation setting, and slider 12's T shape structure is convenient to connect solid lock, is favorable to subtracting heavy setting moreover, reduces overall structure's weight, and sensing piece 13 is the steel sheet No. 45, long service life corresponds with sensor 17, and the response sensitivity is high, and sensing piece 13, slider 12 keep away from support 11's one end and support 11 parallel and level setting, and sensing piece 13 length direction's both ends are the arc, and is pleasing to the eye, and be difficult for damaging operating personnel moreover.
Preferably, the sensor 17 is an eddy current sensor 17 or a laser distance sensor 17, the sensor 17 is of a flat T-shaped structure, a third wire groove 171 is formed in the upper end of the sensor 17, the principle of the sensor 17 is the same as that of a common eddy current sensor 17, the structural form is changed into the form of the sensor, the sensor is of a relatively common cylindrical structure, the occupied space of the sensor is smaller, the whole structure is more compact, the occupied space is smaller, the sensor is convenient to take and place, the whole appearance is attractive, four threading holes 172 are formed in the lower end of the sensor 17, sensing areas of the threading holes 172 are uniformly distributed in the circumferential direction relative to the center, and concave sealing grooves 173 are formed in the lower ends of the threading holes 172, so that the sensor is favorable for sealing after threading and preventing moisture or other external environmental influences.
Preferably, the sensor 17 is a wide-range ranging eddy current sensor 17, the diameter is 25mm, the measuring range is 20mm, the precision is +/-1.5%, and the monitor comprises a front-end processor which is a small-size front-end processor matched with the sensor 17 and is convenient to integrate into carbon slide plate thickness measuring equipment.
Preferably, the housing 21 of the monitor is composed of a sheet metal housing 21 and four corners are provided with corner protectors 22, the monitor comprises a processor which performs analog-digital conversion and obtains the distance value between the sensor 17 and the sensing piece 13, the processor selects STM32F103 series 32 bit processors, STM32F series belongs to a middle-low end 32 bit ARM microcontroller, the series chips are manufactured by the company of Italian Semiconductor (ST), and the kernel is Cortex-M3. The series of chips can be divided into three main types according to the size of Flash in the chip: small capacity (16K and 32K), medium capacity (64K and 128K), large capacity (256K, 384K and 512K). The chip integrates a timer, a CAN, an ADC, an SPI, an I2C, a USB, a UART, and the like, a voltage signal generated by the eddy current sensor 17 is connected to an ADC pin of a processor, the processor performs analog-digital conversion to obtain a digital quantity, and a distance value between the sensor 17 and a target metal sheet is obtained through linearization and calibration algorithm, and a circuit board where the processor is located is connected with a shell 21 of the monitor through a copper column.
Preferably, the monitor comprises a display screen 26 and a film button 27, wherein the display screen 26 displays texts and curves formed by data processed by the processor, a UART liquid crystal module is adopted as a finished color TFT display screen 26 device, UART interfaces are used for displaying, 5V power supply is adopted, the human-computer interface is friendly, the display screen 26 is connected and fixed with the shell 21 through screws, and the film button 27 is used for inputting parameters and controlling flow; more preferably, the upper end of the detector is provided with a first aviation connector 23, a second aviation connector 24 and a charging connector 25 which are in threaded connection, the first aviation connector 23 is used for connecting a connecting wire of the eddy current sensor 17, the second aviation connector 24 is used for leading out communication data, the charging connector 25 is used for connecting a charger, more preferably, a film key 27 is fixedly connected with the shell 21 in a pasting mode, and the film key 27 comprises a back key, an upper key, a lower key, a left key, a right key, a start key, a set key and a start key which are used for switching on and off equipment; the left key is used for determining the starting point of the test position; the right key is used for determining the ending point of the test position; the set key is used for equipment zero clearing operation; the back key is used as a function key for selecting information such as user date, train number, carbon slide plate number and the like; the upper key is a function key, and the user date, the train number, the carbon slide plate number and other information are selected; the upper key is a function key, and the user date, the train number, the carbon slide plate number and other information are selected; more preferably, one side of the monitor is provided with a handle 28 for easy handling.
The area of the display screen 26 is divided into an upper part and a lower part, wherein the upper part is sequentially arranged as A, B and a C area from left to right, the lower part is arranged as a D area, and the area A is used for displaying the minimum value of five areas divided evenly after the test is finished; the area B is used for displaying the real-time thickness of the carbon slide plate; the area C is used for displaying the thickness state of the carbon sliding plate, and is red when the limit value is exceeded and green when the limit value is not exceeded; the area D is used for displaying user operation prompt information.
Preferably, the monitor also comprises a power supply circuit, a CAN interface and an SD card interface circuit, wherein the power supply circuit is a DCDC power converter, the LM2676 of the DCDC power converter is used for converting 8.4V of battery voltage into 5V to supply power to the liquid crystal and the eddy current front-end processor, the conversion efficiency of the device is as high as more than 85%, and the device is suitable for portable equipment powered by batteries; and then the LDO low-dropout power supply device LM1117-3.3V is used for converting 5V into 3.3V to supply power for the singlechip, the device is characterized by small pressure difference and low output ripple, the CAN interface is used for uploading the thickness information of the carbon slide plate acquired by the equipment to a third party acquisition control system, and the SD card interface circuit is used for storing the acquired thickness information of the carbon slide plate into the SD card and storing the thickness information in an EXCEL document form, so that the data management is convenient.
In the actual working process, the device is started by pressing the start key for a long time, the display screen 26 is lightened, the set key is clicked, zero clearing operation is carried out, calibration is completed, the probe assembly is placed at the starting point of the carbon slide plate to be tested, namely one end of the carbon slide plate, then the left key is clicked, the starting point position is determined, after the sound of dripping is emitted, the probe device is moved on the carbon slide plate, the area B displays the testing distance in real time, the end point is moved, the right key is clicked, the end position is determined, when the thickness of the carbon slide plate is smaller than the set limit value in the testing process, the area C becomes red, and meanwhile, the buzzer emits abnormal sound to remind operators of the excessive limit; when the thickness of the carbon slide plate is not smaller than the set limit value, the area C is changed to be green, after the right key is clicked, the area A is displayed to be equally divided into 5 areas from the starting point position to the final point position, after the minimum value of each area is clicked, the upper key is clicked, test data can be output, and the lower key is clicked, so that the appearance curve of the carbon slide plate can be displayed.
The foregoing describes one embodiment of the present invention in detail, but the description is only a preferred embodiment of the present invention and should not be construed as limiting the scope of the invention. All equivalent changes and modifications within the scope of the present invention are intended to be covered by the present invention.
Claims (6)
1. Carbon slide thickness measuring device based on electric vortex sensor, its characterized in that: the probe comprises a probe assembly and a monitor, wherein the probe assembly comprises a support, a sliding block and a sensor, the support is of a vertically arranged groove-shaped structure, the sliding block is arranged in the support and moves up and down relative to the support, a spring enabling the sliding block to move downwards is arranged between the sliding block and the lower end face of the support, an induction piece is arranged at the upper end of the sliding block, a position avoidance hole is formed in an area, corresponding to the induction piece, of the support, the sensor is arranged relative to the induction piece and detects the upper position and the lower position of the induction piece, and the sensor is electrically connected with the monitor;
the monitor is used for receiving, processing and displaying data;
The middle part of the lower end of the sliding block is embedded with a first universal ball bearing, the lower end face of the first universal ball bearing is lower than the lower end of the sliding block, the lower end face of the bracket is embedded with a plurality of second universal ball bearings, the upper end face of the second universal ball bearing is higher than the upper end face of the bracket, and the first universal ball bearing is arranged right above the area formed by the plurality of second universal ball bearings;
The support comprises a bottom plate, a vertical plate and a top plate, the clearance hole is formed in the top plate, the section of the vertical plate is groove-shaped and is provided with an opening towards the sliding block, a fixed plate is arranged between the sliding block and the vertical plate and is fixedly connected with the vertical plate, the sliding block and the fixed plate are connected in a sliding mode up and down through a linear rail, the spring is arranged between the sliding block and the bottom plate and has a tensile force on the sliding block, one end of the spring is fixedly connected with the bottom plate, and the other end of the spring is fixedly connected with the lower end of the sliding block;
The upper end of the bracket is fixedly provided with a top cover, the sensor is embedded in the lower end of the top cover, one end of the top cover, which is close to the bracket, is provided with a first wire groove, the upper end of the bracket is provided with a second wire groove, the first wire groove and the second wire groove are correspondingly arranged up and down, and the first wire groove is correspondingly arranged with a signal wire of the sensor;
The slider is T shape and wider one end with the support cooperation sets up, the response piece is the steel sheet of No. 45, response piece, slider keep away from the one end of support with the support parallel and level sets up, response piece length direction's both ends are the arc.
2. The carbon slide thickness measuring device based on eddy current sensor according to claim 1, wherein: the sensor is an eddy current sensor, the sensor is of a flat T-shaped structure, and a third wire slot is arranged at the upper end of the sensor.
3. The carbon slide thickness measuring device based on eddy current sensor according to claim 1, wherein: the sensor is a wide-range ranging eddy current sensor with the diameter of 25mm, the range of 20mm and the precision of +/-1.5%, and the monitor comprises a front-end processor which is a small-size front-end processor matched with the sensor.
4. The carbon slide thickness measuring device based on eddy current sensor according to claim 1, wherein: the monitor includes a processor that performs an analog-to-digital conversion and obtains a value of the distance between the sensor and the sensing tile, the processor selecting an STM32F103 series 32-bit processor.
5. The carbon slide thickness measuring device based on eddy current sensor according to claim 4, wherein: the monitor comprises a display screen and a film key, wherein the display screen is used for displaying texts and curves formed by data processed by the processor, and the film key is used for inputting parameters and controlling flow.
6. The carbon slide thickness measuring device based on eddy current sensor according to claim 4, wherein: the monitor further comprises a power supply circuit, a CAN interface and an SD card interface circuit, wherein the power supply circuit is a DCDC power converter, the CAN interface is used for uploading the thickness information of the carbon skateboard collected by the equipment to a third party collection control system, and the SD card interface circuit is used for storing the collected thickness information of the carbon skateboard into an SD card and storing the collected thickness information in an EXCEL document mode.
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