CN2886531Y - Fluid pressure sensing device - Google Patents
Fluid pressure sensing device Download PDFInfo
- Publication number
- CN2886531Y CN2886531Y CN 200620102570 CN200620102570U CN2886531Y CN 2886531 Y CN2886531 Y CN 2886531Y CN 200620102570 CN200620102570 CN 200620102570 CN 200620102570 U CN200620102570 U CN 200620102570U CN 2886531 Y CN2886531 Y CN 2886531Y
- Authority
- CN
- China
- Prior art keywords
- sensing device
- fluid pressure
- pressure sensing
- end cap
- magnet
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
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Abstract
The utility model is a fluid pressure sensing device, comprising a casing (1) and its end cap (2), characterized in that a piston (8) is arranged in the casing (1), an upper magnet (5) and a lower magnet (7) are provided on the piston shaft (8.1) with their polarities opposite, magnetic sensing sensors are fixed between the two magnets with their polarities opposite, the magnetic sensing sensors employ Hall sensors (11). The design of the utility model reinforces the magnetic density of the radial annular magnet, and the sensibility of the magnetic sensing sensors is obviously improved. In addition, springs with different elasticity can be replaced according to different testing lower limit, the testing flexibility is extended; the pressure measuring extent can be increased by adopting bipolar Hall sensors.
Description
Technical field:
The utility model relates to pressure measurement technology, particularly a kind of fluid pressure sensing device.
Background technology:
Existing fluid pressure sensing device, the deformation of general more employing diaphragm changes into electric signal; Also have the Hall element of employing to take near its magnet movable signal, because magnet need can not be selected the magnet of larger volume for use with fluid movement, otherwise the test lower limit is higher, and adaptive surface is little; If select the magnet of smaller size smaller for use, magnetic field intensity is lower, also causes measurement sensitivity to reduce; Common Hall element can only react positive flux field or negative fluxfield, and pressure measurement range is little.
Summary of the invention:
The purpose of this utility model provides a kind of fluid pressure sensing device with big accommodation and high measurement sensitivity.
The utility model fluid pressure sensing device comprises housing and end cap thereof, it is characterized in that being equipped with in the housing piston, and piston rod is equipped with two magnets up and down, sets firmly magneto-dependent sensor between these two magnets.
Above-mentioned two magnets are with the polar repulsion setting, and magnet can be selected ndfeb magnet for use.
Above-mentioned magneto-dependent sensor can adopt Hall element.
Above-mentioned Hall element can adopt ambipolar, and this Hall element is fixedly arranged on the end cap sidepiece in the deep pit in center, and the ring piece shape magnet of its top is fixed in the piston rod top, and the ring piece shape magnet of its below is fixed in the step place at piston rod middle part by jump ring.
The tube with import and outlet of above-mentioned housing and its bottom is made one, and this tube is communicated with by through hole with the housing inner chamber.
Above-mentioned piston rod is with volute spring, and this both ends of the spring pushes up mutually with end cap and top land respectively.
Piston rod in the utility model design housing is installed following two magnets, between these two magnets, set firmly magneto-dependent sensor, because two magnet polar repulsions are installed up and down, ring piece shape magnet radial magnetic field intensity is strengthened, the sensitivity of magneto-dependent sensor obviously improves; In addition, for different test lower limits,,, measure adaptive surface and enlarge such as the fluid media (medium) of different viscosities as long as change the spring of different elastic force; If adopt ambipolar Hall element, can increase pressure measurement range.
Description of drawings:
Fig. 1 has represented the vertical view of the utility model embodiment.
Fig. 2 is A-A middle section figure among Fig. 1.
Embodiment:
With reference to accompanying drawing.The embodiment housing is made drum shape, and housing 1 is made one with the tube with import 13 and outlet 14 of its bottom, and this tube is communicated with by through hole 12 with the housing inner chamber, so that detected fluid enters the housing inner chamber.Housing 1 upper edge and end cap 2 be fastening and bonding loam cakes 3 by screw 10, or by screw 10 loam cake 3, end cap 2, housing 1 are tightened to one.Piston 8 is housed in the housing 1, piston rod 8.1 tops of making one with piston 8 are by screw 4 fixed ring piece shape upper magnets 5 and be positioned at end cap 2 upper surfaces, the step place made at piston rod 8.1 middle parts is fixing with ring piece shape lower magnet 7 by jump ring 6, these two magnets are with the polar repulsion setting, and N-N is relative as shown in FIG..End cap 2 sidepieces between two magnets 5,7 are shaped on to the deep pit in center, and Hall element 11 embeds in this pit.Hall element adopts the ambipolar Hall element of commercially available SS490 type, can react positive negative fluxfield, and output is directly proportional with magnetic field intensity.When detected fluid when import 13 enters, some enters the housing inner chamber from through hole 12, and lifting piston 8, two magnets 5,7 move up thereupon, and pressure is high more, and it is big more to move the width of cloth, microcomputer chip is according to magnetic field intensity and move relation between the width of cloth, is converted into pressure data output and shows.
Piston rod 8.1 is with volute spring 9, its two ends respectively with end cap 2 lower surfaces and piston 8 top Xiang Ding.Volute spring 9 is set provides an original pressure measured value, with the extending pressure measured value upper limit because can not get case design very long, the sensitivity of magneto-dependent sensor also limited can not with magnet at a distance of far away excessively.For surpassing desired upper limit pressure measuring value, can adopt the spring of changing different elastic force to solve.
Claims (8)
1, a kind of fluid pressure sensing device comprises housing (1) and end cap (2) thereof, it is characterized in that being equipped with in the housing (1) piston (8), and piston rod (8.1) is equipped with upper magnet (5) and lower magnet (7), sets firmly magneto-dependent sensor between these two magnets.
2, fluid pressure sensing device according to claim 1 is characterized in that two magnets are with the polar repulsion setting.
3, fluid pressure sensing device according to claim 1 is characterized in that magneto-dependent sensor adopts Hall element (11).
4, fluid pressure sensing device according to claim 3, it is ambipolar to it is characterized in that Hall element (11) adopts, this Hall element is fixedly arranged on end cap (2) sidepiece in the deep pit in center, the ring piece shape magnet (5) of its top is fixed in piston rod (8.1) top, and the ring piece shape magnet (7) of its below is fixed in the step place at piston rod (8.1) middle part.
5, fluid pressure sensing device according to claim 4 is characterized in that the ring piece shape magnet (7) at piston rod (8.1) middle part is fixing by jump ring (6).
6, fluid pressure sensing device according to claim 1 is characterized in that the tube with import (13) and outlet (14) of housing (1) and its bottom is made one, and this tube is communicated with by through hole (12) with the housing inner chamber.
7, fluid pressure sensing device according to claim 6 is characterized in that piston rod (8.1) is with volute spring (9), spring (9) two ends respectively with end cap (2) and piston (8) top Xiang Ding.
8, fluid pressure sensing device according to claim 1 is characterized in that end cap (2) is provided with loam cake (3), by screw (10) loam cake (3), end cap (2), housing (1) is tightened to one.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200620102570 CN2886531Y (en) | 2006-04-12 | 2006-04-12 | Fluid pressure sensing device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200620102570 CN2886531Y (en) | 2006-04-12 | 2006-04-12 | Fluid pressure sensing device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2886531Y true CN2886531Y (en) | 2007-04-04 |
Family
ID=37961619
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200620102570 Expired - Fee Related CN2886531Y (en) | 2006-04-12 | 2006-04-12 | Fluid pressure sensing device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2886531Y (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102445241A (en) * | 2010-10-05 | 2012-05-09 | 俞建峰 | Magnetic-sensing-type flow sensing system |
| CN112325953A (en) * | 2020-10-14 | 2021-02-05 | 北京电子科技职业学院 | Micro-flow sensor with adjustable inner chamber based on magnetic liquid |
| US11337334B2 (en) * | 2015-07-31 | 2022-05-17 | Cooler Master Co., Ltd. | Liquid supply device and liquid cooling system |
-
2006
- 2006-04-12 CN CN 200620102570 patent/CN2886531Y/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102445241A (en) * | 2010-10-05 | 2012-05-09 | 俞建峰 | Magnetic-sensing-type flow sensing system |
| US11337334B2 (en) * | 2015-07-31 | 2022-05-17 | Cooler Master Co., Ltd. | Liquid supply device and liquid cooling system |
| CN112325953A (en) * | 2020-10-14 | 2021-02-05 | 北京电子科技职业学院 | Micro-flow sensor with adjustable inner chamber based on magnetic liquid |
| CN112325953B (en) * | 2020-10-14 | 2023-06-02 | 北京电子科技职业学院 | Micro-flow sensor with adjustable inner cavity based on magnetic liquid |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20070404 Termination date: 20100412 |