CN209539707U - A kind of ceramic cylinder rod Non-contact stroke measuring device - Google Patents
A kind of ceramic cylinder rod Non-contact stroke measuring device Download PDFInfo
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- CN209539707U CN209539707U CN201821973169.5U CN201821973169U CN209539707U CN 209539707 U CN209539707 U CN 209539707U CN 201821973169 U CN201821973169 U CN 201821973169U CN 209539707 U CN209539707 U CN 209539707U
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- cylinder rod
- ceramic cylinder
- measuring device
- slot
- stroke
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Abstract
The utility model discloses a kind of ceramic cylinder rod Non-contact stroke measuring devices, it is related to stroke measurment field, the device includes ceramic cylinder rod, stroke sensor, cable and now instrument, the stroke sensor is connected by cable with now instrument, and several index slots are provided on the matrix of the ceramic cylinder rod, and the width of the index slot is d, the distance between adjacent index slot is d, and the surface of described matrix and index slot is coated with ceramic layer；The stroke sensor includes magnetic pole and several pairs of Hall elements, and the top of ceramic cylinder rod is arranged in the magnetic pole, and the Hall element has certain distance between ceramic cylinder rod and magnetic pole between ceramic cylinder rod.The precision of the utility model high reliablity, stroke measurment can be obtained by piston rod and stroke sensor flexible combination, and applicability is more preferable.
Description
Technical field
The utility model relates to stroke measurment fields, and in particular to a kind of contactless stroke measurment dress of ceramic cylinder rod
It sets.
Background technique
Hydraulic headstock gear in power station and ocean development project generally includes hydraulic system and hydraulic cylinder, hydraulic system
The movement set adjacent with piston rod is controlled by controlling speed and the stroke of hydraulic cylinder.It is opened from middle nineteen nineties in last century
Begin, in order to make hydraulic cylinder piston rod have the characteristics that high chemical stability, high rigidity, high rigidity, low frictional factor, hydraulic cylinder
Piston rod generallys use the piston rod of ceramic coating.
The utility model of 202692931 U of Publication No. CN discloses a kind of ceramic cylinder rod device for detecting distance of travel, passes through
Equidistant groove is set under piston rod ceramic layer and constitutes detection section, is close to piston rod setting magnet containing multiple groups and magneto sensor
Inductive head, to realize stroke detection；205895764 U utility model patent of Publication No. CN discloses a kind of hydraulic cylinder
Built-in stroke detecting apparatus, the Hall sensor used has been internally integrated two phase differences as 90 degree of sensing element,
Near to or in contact with ceramic cylinder rod surface, ceramic cylinder rod carbon steel or alloy steel matrix surface are provided with groove width and the wide phase of spacing
Deng groove, sensor detection accuracy reaches 1mm or less.The device for detecting distance of travel of above two method does not account for ceramic work
When the stroke measurment of stopper rod, due to the harsh vibration use environment of hydraulic cylinder, it may appear that the case where stroke value detection is lost；Separately
Outside, to improve measurement accuracy, the width of reduction piston rod groove simply will increase being processed into for hydraulic cylinder ceramic cylinder rod
This.
Utility model content
In view of the deficiencies in the prior art, the purpose of this utility model is to provide a kind of ceramic cylinder rod is non-contact
Formula stroke measuring device, reliability is higher, and applicability is preferable.
To achieve the above objectives, the technical scheme adopted by the utility model is that:
Including ceramic cylinder rod, stroke sensor, cable and now instrument, the stroke sensor is by cable and now
Instrument is connected, and is provided with several index slots on ceramic cylinder rod matrix, and the width of the index slot is d, between adjacent index slot
Distance be d, the surface of the ceramic cylinder rod matrix and index slot is coated with ceramic layer；
The stroke sensor includes magnetic pole and several pairs of Hall elements, and the upper of ceramic cylinder rod is arranged in the magnetic pole
Side, the Hall element have certain distance between ceramic cylinder rod and magnetic pole between ceramic cylinder rod.
Further, the index slot opposite two while for induction: rising edge and trailing edge.
Further, the Hall element is arranged in pairs along the axis direction of ceramic cylinder rod, adjacent two pairs of Hall elements
Between between from being integer for 2nd+d, n, meet in a pair of of Hall element, when a Hall element movement is under index slot
When dropping side, another is located at the rising edge of a certain index slot.
Further, when the logarithm of the Hall element is m, the index slot that width is d is divided equally Hall element by m,
Spacing between two pairs of Hall elements are as follows: kd+d/m, k are positive integer.
Further, the measurement accuracy of the stroke measuring device is f, and f=d/m, d are the width of index slot, and m is Hall
The logarithm of element.
Further, the index slot is to rise as high as the banks or annular groove.
Further, when the index slot is to rise as high as the banks, depth is more than or equal to depth when index slot is annular groove.
Further, when the index slot is annular groove, the depth of the index slot is 0.3~0.5mm.
Further, the stroke sensor further includes signal processing circuit and package casing.
Compared with the prior art, the advantages of the utility model are:
(1) the ceramic cylinder rod Non-contact stroke measuring device in the utility model, including ceramic cylinder rod, stroke pass
Sensor and now instrument.It is provided with several index slots on ceramic cylinder rod matrix, the width of index slot is d, between adjacent index slot
Distance be d, ceramic cylinder rod matrix and index slot thermal spraying on surface ceramic layer.Stroke sensor includes magnetic pole and several to suddenly
The top of piston rod is arranged in that element, magnetic pole, and Hall element keeps a spacing between piston rod and magnetic pole, with piston rod
From.Stroke sensor is connected by cable with now instrument, and when in use, the movement of piston rod relative travel sensor is a pair of
In Hall element, when a Hall element relative motion is in the trailing edge of index slot, another close on the index slot or its
The rising edge of his index slot；Two Hall element output waveform phase difference (2n+1) pi/2s (n=0,1,2 ...), pass through differential electrical
Road, it can be achieved that signal enhancing so that detection reliability improve.
(2) the ceramic cylinder rod Non-contact stroke measuring device in the utility model, the precision of stroke measurment is by groove width d
It is determined with the logarithm m of Hall element in stroke sensor, accuracy value are as follows: d/m can pass through to obtain identical measurement accuracy
Change the logarithm m or groove width d of Hall element to realize, in actual use, will lead to Ceramic piston due to lowering groove width d
The processing of bar is more complex, higher cost, therefore, can be by the logarithm m of increase Hall element, the situation for keeping groove width d larger
Under, measurement accuracy is higher, thereby reduces the difficulty of processing and cost of ceramic cylinder rod.
(3) the ceramic cylinder rod Non-contact stroke measuring device in the utility model, the processing electricity in stroke sensor
Road is relatively easy, increases the reliability and stability of Sensor section；Signal phase compares, counts, and climb displacement is by existingly
Instrument is completed and output, so that measuring system is by stronger environmental suitability.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of ceramic cylinder rod Non-contact stroke measuring device in the utility model embodiment；
Fig. 2 is the structural schematic diagram of ceramic cylinder rod matrix in the utility model embodiment；
The structural representation that ceramic cylinder rod matrix cooperates in magnetic pole and Hall element in the utility model embodiment of the position Fig. 3
Figure.
In figure: 1- ceramic cylinder rod, 2- stroke sensor, 3- cable, existing the instrument of 4-, 5- ceramic cylinder rod matrix, 6-
Index slot, 7- ceramic layer, 8- trailing edge, 9- rising edge, 10- Hall element, 11- magnetic pole.
Specific embodiment
The embodiments of the present invention are described in further detail below in conjunction with attached drawing.
Shown in Figure 1, the utility model embodiment provides a kind of ceramic cylinder rod Non-contact stroke measuring device, packet
Include ceramic cylinder rod 1, stroke sensor 2, cable 3 and now instrument 4.
It is shown in Figure 2, several index slots 6 are provided on ceramic cylinder rod matrix 5, the width of index slot 6 is d, adjacent mark
The distance between slot 6 is determined for d, and the surface of ceramic cylinder rod matrix 5 and index slot 6 is coated with ceramic layer 7, and ceramic layer 7 enhances
The corrosion-resistant and wear-resisting property of ceramic cylinder rod matrix 5.
For the ease of processing, width d >=2mm of general index slot 6, index slot 6 opposite two while for induction: rising
Side 9 and trailing edge 8, rising edge 9 and trailing edge 8 are magnetic variation sensing side, form the baseline groove of scale, as measurement base
It is quasi-.
Index slot 6 is to rise as high as the banks or annular groove: when index slot 6 be annular groove, the depth of index slot 6 is 0.3~0.5mm；
When index slot 6 is to rise as high as the banks, depth is more than or equal to depth when index slot 6 is annular groove.
Stroke sensor 2 includes magnetic pole 11, signal processing circuit, package casing and several pairs of Hall elements 10, this implementation
Magnetic pole 11 in example selects SmCo band iron pole piece, and the top of ceramic cylinder rod 1 is arranged in magnetic pole 11, and Hall element 10 is located at
Between ceramic cylinder rod 1 and magnetic pole 11, certain distance is kept with ceramic cylinder rod, stroke sensor 2 is by cable 3 and now
Instrument 4 is connected.
The signal processing circuit of stroke sensor 2 is used to complete Hall element 10 and generates the amplification of waveform, offset adjustment, increases
Benefit control, and m group signal is exported to now instrument 4.
Now instrument 4 provides power supply to stroke sensor 2, and receives the waveform signal of the output of stroke sensor 2, now instrument
Table completes counting, phase bit comparison, and ceramic cylinder rod 1 and 2 distance of relative movement of stroke sensor is calculated, and completes stroke value
Digital-scroll technique, provide signal output.
In actual use, stroke sensor 2 is electric by Hall element 10, magnetic pole 11, signal processing by epoxide-resin glue
Road is encapsulated in corrosion-proof casing, adaptability of the improved stroke sensor 2 under severe site environment.
Hall element 10 arranges in pairs along the axis direction of ceramic cylinder rod 1, between adjacent two pairs of Hall elements 10 between
Gauge is from for (2n+1) d (n is integer 0,1,2 ...), meeting in a pair of of Hall element 10, at 10 movement of Hall element
When the trailing edge 8 of index slot 6, another is located at the rising edge 9 of a certain index slot 6；Two 10 output waveform phases of Hall element
Potential difference (2n+1) pi/2 (for integer 0,1,2 ...), by difference channel, it can be achieved that the enhancing of signal.
It is shown in Figure 3, when stroke sensor 2 include m to Hall element 10 when, width is d to Hall element 10 by m
Index slot 6 is divided equally, and the spacing between two pairs of Hall elements 10 meets formula one: kd+d/m, and k is positive integer.
Quantity and cloth of the precision of the ceramic cylinder rod stroke measurment m as included by stroke sensor 2 to Hall element 10
It sets mode to determine, measurement accuracy f is obtained by formula two:
F=d/m；
In formula two:
F is measurement accuracy, unit mm；
D is the width of index slot 6, unit mm；
M is the logarithm of Hall element, and m >=2, m divide equally scale reference reticle to Hall element.
As m >=2, m determines that ceramic cylinder rod 1 and stroke sensor 2 are opposite by different phases to Hall element 10
The direction of movement.
Such as: as scale reference reticle spacing d=2mm, the logarithm m of Hall element 10 is 2, and Hall element is 2k to spacing
+ 1 (k=1,2,3 ...), selects k=3 in this example, spacing=7 between adjacent two pairs of Hall elements 10, the pottery in the embodiment
The precision of 1 stroke measurment of porcelain piston rod can reach: f=d/m=2/2=1mm.
As scale reference reticle spacing d=5mm, the logarithm m of Hall element 10 is 4, and Hall element is 5k+1 (k to spacing
=1,2,3 ...) k=2, is selected in this example, spacing=11.25 between adjacent two pairs of Hall elements 10, the pottery in the embodiment
The precision of 1 stroke measurment of porcelain piston rod can reach: f=d/m=5/4=1.25mm.
The utility model is not only limited to above-mentioned preferred forms, anyone can obtain under the enlightenment of the utility model
Other various forms of products out, however, make any variation in its shape or structure, it is all to have and the utility model phase
Same or similar technical solution, within its protection scope.
Claims (9)
1. a kind of ceramic cylinder rod Non-contact stroke measuring device, including ceramic cylinder rod (1), stroke sensor (2), cable
(3) and now instrument (4), the stroke sensor (2) are connected by cable (3) with now instrument (4), it is characterised in that:
It is provided on ceramic cylinder rod matrix (5) several index slots (6), the width of the index slot (6) is d, between adjacent index slot (6)
Distance be d, the surface of the ceramic cylinder rod matrix (5) and index slot (6) is coated with ceramic layer (7)；
The stroke sensor (2) includes magnetic pole (11) and several pairs of Hall elements (10), and the magnetic pole (11) is arranged in ceramics
The top of piston rod (1), the Hall element (10) is located between ceramic cylinder rod (1) and magnetic pole (11), and and Ceramic piston
Bar has certain distance between (1).
2. a kind of ceramic cylinder rod Non-contact stroke measuring device as described in claim 1, it is characterised in that: the calibration
Slot (6) opposite two while for induction: rising edge (9) and trailing edge (8).
3. a kind of ceramic cylinder rod Non-contact stroke measuring device as claimed in claim 2, it is characterised in that: the Hall
Element (10) arranges in pairs along the axis direction of ceramic cylinder rod (1), between adjacent two pairs of Hall elements (10) between from for 2nd
+ d, n are integer, are met in a pair of of Hall element (10), when Hall element (10) movement is in the trailing edge of index slot (6)
(8) when, another is located at the rising edge (9) of a certain index slot (6).
4. a kind of ceramic cylinder rod Non-contact stroke measuring device as claimed in claim 3, it is characterised in that: when it is described suddenly
When the logarithm of your element (10) is m, the index slot (6) that width is d is divided equally Hall element (10) by m, two pairs of Hall elements
(10) spacing between are as follows: kd+d/m, k are positive integer.
5. a kind of ceramic cylinder rod Non-contact stroke measuring device as claimed in claim 4, it is characterised in that: the stroke
The measurement accuracy of measuring device is f, and f=d/m, d are the width of index slot (6), and m is the logarithm of Hall element (10).
6. a kind of ceramic cylinder rod Non-contact stroke measuring device as described in claim 1, it is characterised in that: the calibration
Slot (6) is to rise as high as the banks or annular groove.
7. a kind of ceramic cylinder rod Non-contact stroke measuring device as claimed in claim 6, it is characterised in that: when the mark
Determining slot (6) is when rising as high as the banks, and depth is more than or equal to depth when index slot (6) are annular groove.
8. a kind of ceramic cylinder rod Non-contact stroke measuring device as claimed in claim 6, it is characterised in that: when the mark
When to determine slot (6) be annular groove, the depth of the index slot (6) is 0.3~0.5mm.
9. a kind of ceramic cylinder rod Non-contact stroke measuring device as described in claim 1, it is characterised in that: the stroke
Sensor (2) further includes signal processing circuit and package casing.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821973169.5U CN209539707U (en) | 2018-11-27 | 2018-11-27 | A kind of ceramic cylinder rod Non-contact stroke measuring device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821973169.5U CN209539707U (en) | 2018-11-27 | 2018-11-27 | A kind of ceramic cylinder rod Non-contact stroke measuring device |
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| Publication Number | Publication Date |
|---|---|
| CN209539707U true CN209539707U (en) | 2019-10-25 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201821973169.5U Active CN209539707U (en) | 2018-11-27 | 2018-11-27 | A kind of ceramic cylinder rod Non-contact stroke measuring device |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117190836A (en) * | 2023-10-31 | 2023-12-08 | 万向钱潮股份公司 | Calibration method of travel sensor |
-
2018
- 2018-11-27 CN CN201821973169.5U patent/CN209539707U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117190836A (en) * | 2023-10-31 | 2023-12-08 | 万向钱潮股份公司 | Calibration method of travel sensor |
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