CN201255677Y - Air fluid pressure sensor - Google Patents
Air fluid pressure sensor Download PDFInfo
- Publication number
- CN201255677Y CN201255677Y CNU2008201225290U CN200820122529U CN201255677Y CN 201255677 Y CN201255677 Y CN 201255677Y CN U2008201225290 U CNU2008201225290 U CN U2008201225290U CN 200820122529 U CN200820122529 U CN 200820122529U CN 201255677 Y CN201255677 Y CN 201255677Y
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- total head
- static pressure
- sampling
- pressure
- chamber
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Abstract
The utility model relates to an air fluid pressure sensor which is provided with a pressure stabilizing output device; the pressure stabilizing output device is provided with a full pressure sampling arm, a full pressure output port and a static pressure output port subsequently from left to right; the pressure stabilizing output device is provided with a full pressure stabilizing cavity; a static pressure stabilizing cavity is arranged on the right side of the full pressure stabilizing cavity; the full pressure output port is communicated with the full pressure stabilizing cavity; the static pressure output port is communicated with the static pressure stabilizing cavity; the full pressure sampling arm is provided with a full pressure sampling hole; the full pressure sampling hole is communicated with a fluid sampling channel arranged in the full pressure sampling arm; and the fluid sampling channel is communicated with the full pressure stabilizing cavity. The air fluid pressure sensor adopts the design of the full pressure sampling hole, which effectively eliminates the impact of airflow pattern on pressure detection. The design of a static pressure detecting hole can ensure pressure sampling and outputting precision, and reduce airflow pressure drop and noise produced when air flows past.
Description
Technical field
The utility model relates to a kind of pressure transducer, be particularly related to a kind of pressure transducer of measuring air fluid pressure that is applicable to, this pressure transducer can accurately be measured total head, the static pressure of the air of flowing through, and further calculate the flow that obtains the dynamic pressure and the air of flowing through, thereby extensively satisfy the application scenario that all kinds of needs are measured moving air pressure and air quantity.
Technical background
The device that is used to measure air fluid pressure at present is general to adopt common Pitot tube principle to carry out, and having obvious defects according to the device for pressure measurement that common Pitot tube principle is made, it can't be eliminated the air-flow of flowing through and produce the influence that obvious turbulent disturbance causes; When using this kind device for pressure measurement to measure, device for pressure measurement must be arranged in the stable air-flow section, be that measurement mechanism must be placed in the airflow environment that is similar to laminar flow and could guarantee tonometric precision, and gas velocity be lower than the flowing velocity of 5M/S when following measurement mechanism can't obtain accurate measurement result.Put down in writing a kind of shaft coupling Pitot tube as Chinese patent 00226927.9, this shaft coupling Pitot tube comprises inner connecting tube (1), extension tube attached (2), the measuring head of forming by stagnation pressure gas channel (6) and static pressure gas channel (7) (3), static pressure gas channel (7) places in the stagnation pressure gas channel (6), have pitot hole (4) on two passages, baroport (5), it also comprises in the connection, the shaft coupling (8) of extension tube attached and measuring head (3), this shaft coupling one end is provided with the passage (9) that docks with the stagnation pressure gas channel (6) and the static pressure gas channel (7) of measuring head (3), (10), this passage (9), (10) elongated end is connected with extension tube attached (2) with inner connecting tube (1) respectively.Can play the raising measuring accuracy to a certain extent though adopt this kind Pitot tube to measure stream pressure, reduce and disturb, dwindle the purpose of error, but can not fundamentally solve the turbulent air flow disturbance to influence that measurement result caused, can't change under the not high condition of stream condition stability, measuring error is higher, and the measuring wind scope is narrower, uses to be subjected to bigger present situation.Therefore, need to propose a kind of novel air fluid pressure transducer and solve the problems referred to above.
Summary of the invention
The purpose of this utility model is to provide a kind of air fluid pressure transducer, this sensor is improved on common Pitot tube principle basis, this device is provided with total head thieff hatch, total head and all presses chamber and sampling fluids passage, sampling fluids passage and total head all press the chamber to be the mode of being arranged in parallel, can effectively eliminate the turbulent air flow state to measuring the influence of precision, simple in structure, measurement effect is good.
The purpose of this utility model is achieved through the following technical solutions: a kind of air fluid pressure transducer, there is one all to press follower, all press at this and to be provided with the total head sampling arm on follower from left to right successively, total head delivery outlet and static pressure delivery outlet, be provided with total head in the follower and all press the chamber described all the pressure, all press the right-hand static pressure that is provided with in chamber all to press the chamber in this total head, described total head delivery outlet all presses the chamber to be communicated with described total head, described static pressure delivery outlet all presses the chamber to be communicated with described static pressure, on described total head sampling arm, be provided with the total head thieff hatch, this total head thieff hatch and the sampling fluids channel connection that is arranged in the total head sampling arm, described sampling fluids passage all presses the chamber to be communicated with described total head.
Compared with the prior art the utility model has following advantage:
1. the utility model adopts the design that the total head thieff hatch is set on the air fluid pressure transducer, the thieff hatch of different directions is communicated with parallel way with all pressing the chamber, can guarantee the total head state of true reflection from air-flow, can effectively eliminate the influence of gas flow shape to pressure detection, no matter in which kind of gas flow shape, can guarantee that all the precision of measurement reaches more than 95%; In addition, this kind pressure-detecting device can obtain up to the air fluid pressure amplification factor more than 3 times, can in the scope of wind speed 2M/S～14M/S, effectively measure air pressure value, thereby under the different application condition, flow rates provides the solution of accurate measurement air pressure and flow more widely.
2. the utility model has adopted the design that static pressure detects the hole has been set, the static pressure delivery outlet detects the hole with a plurality of static pressure and is communicated with parallel way, can avoid total head sampling arm, total head conduction pipe and static pressure conduction pipe to the influence of many static pressure measurements of air-flow generation secondary disturbance precision, in assurance force samples and output accuracy while, reduce the air-flow pressure drop and the noise of the out-of-date generation of airflow.
Description of drawings
Fig. 1 is a structural representation of the present utility model;
Fig. 2 is structural representation of the present utility model (cut-open view);
Fig. 3 all presses the structural representation (A of Fig. 2-A cut-open view) in chamber for static pressure in the utility model.
Embodiment
A kind of air fluid pressure transducer, there is one all to press follower 1, all press at this and to be provided with total head sampling arm 2 on follower from left to right successively, total head delivery outlet 3 and static pressure delivery outlet 4, be provided with total head in the follower and all press chamber 5 described all the pressure, all press the right-hand static pressure that is provided with in chamber all to press chamber 11 in this total head, described total head delivery outlet all presses the chamber to be communicated with described total head, described static pressure delivery outlet all presses the chamber to be communicated with described static pressure, on described total head sampling arm, be provided with total head thieff hatch 6, this total head thieff hatch sampling fluids passage 7 interior with being arranged on the total head sampling arm is communicated with, and described sampling fluids passage all presses the chamber to be communicated with described total head.
Be provided with flow guiding head 8 at the described follower left end of all pressing, this flow guiding head is a cone, can play the effect of stablizing water conservancy diversion.
The described follower of all pressing is provided with four total head sampling arms, and described four total head sampling arms all are provided with all to press follower to serve as that axle is vertical, and angle is 90 ° between each total head sampling arm; On each total head sampling arm, be provided with at least one total head thieff hatch, and the size of each total head thieff hatch and the position that is arranged on each total head sampling arm are all identical, and the sampling fluids passage that is arranged in each total head sampling arm all presses the chamber to be communicated with parallel way and described total head.Size, the specification of four total head sampling arms described in the present embodiment are all identical, and four total head sampling arms all are arranged in the same vertical plane.On each total head sampling arm, be provided with a total head thieff hatch in the present embodiment.
For attractive in appearance, practical, the total head sampling arm described in the present embodiment can be one of them of oval cylinder, right cylinder, rectangular cylinder or regular polygon cylinder etc.
Described sampling fluids passage one end sealing, the other end all presses the chamber to be communicated with described total head.
The total head sampling arm that described sampling fluids passage seals an end is provided with fixed orifice 9, and this fixed orifice can be fixed on the air fluid pressure transducer in the gas channel of shapes such as circle, ellipse, square or rectangle easily by connected modes such as bolt, rivets.
Described total head delivery outlet all presses the chamber right part to be communicated with described total head, is connected with total head efferent duct 10 on this total head delivery outlet, so that connect outer monitoring equipment, is convenient for measuring and carries effective total head signal.In the present embodiment, described total head delivery outlet is vertically set on the upper wall that described total head is all pressed the chamber right part.
Also be provided with at least two static pressure detection holes 13 on the follower described all the pressure, described static pressure detects hole and described static pressure delivery outlet and constitutes described static pressure test chamber 11 all pressing to interconnect in the follower, and static pressure to detect hole and static pressure delivery outlet serve as spool to be arranged on the same vertical plane all to press follower all.
Static pressure delivery outlet in the present embodiment is arranged on static pressure and all presses the top, chamber, is connected with static pressure conduction pipe 12 on this static pressure delivery outlet, so that connect outer monitoring equipment, is convenient for measuring and carries effective static pressure signal.
In the present embodiment, described all the pressure four static pressure detection holes are set evenly on the follower, the angle that each static pressure detects between the hole is 90 °, and described static pressure delivery outlet is arranged on two all pressures followers between the static pressure detection hole, and size, specification that described four static pressure detect the hole are all identical; The purpose of doing like this is to guarantee force samples and output accuracy simultaneously, further avoids secondary disturbance that dynamic pressure sampling arm, dynamic pressure conduction pipe and static pressure conduction pipe produce air-flow and air-flow pressure drop and the noise that reduces the out-of-date generation of airflow.
Machine gas flow shape sunykatuib analysis as calculated and actual test repeated authentication are determined also according to the air mass flow scope of required mensuration and the size of air flow channel in the length of the total head sampling arm described in above-mentioned, the quantity of total head thieff hatch and the position of arranging, can effectively eliminate the influence of air flow channel arrangement and flow morphology, in corresponding pressure measurement range, guarantee tonometric precision measuring accuracy.
The air total head value that described total head thieff hatch obtains is delivered to the total head of all pressing in the follower through the sampling fluids passage in the total head sampling arm and all presses the chamber, obtain single total head value through average back, and be connected to outer monitoring equipment through the total head delivery outlet, as effective total head signal of measuring with the control foundation.
The material that described total head conduction pipe and static pressure conduction pipe can adopt rubber or other to have good pliability and fire protecting performance is made, and is convenient to flexible arrangement, satisfies the installation of different application occasion and takes over needs.
Claims (10)
1, a kind of air fluid pressure transducer, it is characterized in that: have one all to press follower, all press at this and to be provided with the total head sampling arm on follower from left to right successively, total head delivery outlet and static pressure delivery outlet, be provided with total head in the follower and all press the chamber described all the pressure, all press the right-hand static pressure that is provided with in chamber all to press the chamber in this total head, described total head delivery outlet all presses the chamber to be communicated with described total head, described static pressure delivery outlet all presses the chamber to be communicated with described static pressure, on described total head sampling arm, be provided with the total head thieff hatch, this total head thieff hatch and the sampling fluids channel connection that is arranged in the total head sampling arm, described sampling fluids passage all presses the chamber to be communicated with described total head.
2, air fluid pressure transducer according to claim 1 is characterized in that: be provided with flow guiding head at the described follower left end of all pressing, this flow guiding head is a cone.
3, air fluid pressure transducer according to claim 1, it is characterized in that: the described follower of all pressing is provided with four total head sampling arms, described four total head sampling arms all are provided with all to press follower to serve as that axle is vertical, and angle is 90 ° between each total head sampling arm; Be provided with at least one total head thieff hatch on each total head sampling arm, the sampling fluids passage that is arranged in each total head sampling arm all presses the chamber to be communicated with parallel way and described total head.
4, air fluid pressure transducer according to claim 3 is characterized in that: be provided with a total head thieff hatch on described four total head sampling arms, and the position big or small and that be arranged on each total head sampling arm of each total head thieff hatch is all identical.
5, air fluid pressure transducer according to claim 1 is characterized in that: described total head delivery outlet all presses the chamber right part to be communicated with described total head, is connected with the total head efferent duct on this total head delivery outlet.
6, air fluid pressure transducer according to claim 1, it is characterized in that: also be provided with at least two static pressure detection holes on the follower described all the pressure, described static pressure detects hole and described static pressure delivery outlet and constitutes described static pressure and all press the chamber all pressing to interconnect in the follower, and static pressure to detect hole and static pressure delivery outlet serve as spool to be arranged on the same vertical plane all to press follower all.
7, air fluid pressure transducer according to claim 6, it is characterized in that: four static pressure detection holes evenly are set on the follower described all the pressure, the angle that each static pressure detects between the hole is 90 °, and described static pressure delivery outlet is arranged on two all pressures followers between the static pressure detection hole.
8, air fluid pressure transducer according to claim 1 is characterized in that: be connected with the static pressure conduction pipe on described static pressure delivery outlet.
9, air fluid pressure transducer according to claim 1 is characterized in that: described total head sampling arm can be one of them of oval cylinder, right cylinder, rectangular cylinder or regular polygon cylinder.
10, air fluid pressure transducer according to claim 1 is characterized in that: described sampling fluids passage one end sealing, the other end all presses the chamber to be communicated with described total head.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008201225290U CN201255677Y (en) | 2008-09-17 | 2008-09-17 | Air fluid pressure sensor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008201225290U CN201255677Y (en) | 2008-09-17 | 2008-09-17 | Air fluid pressure sensor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201255677Y true CN201255677Y (en) | 2009-06-10 |
Family
ID=40739001
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2008201225290U Expired - Lifetime CN201255677Y (en) | 2008-09-17 | 2008-09-17 | Air fluid pressure sensor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201255677Y (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108871664A (en) * | 2018-06-26 | 2018-11-23 | 成都英鑫光电科技有限公司 | Air pressure measuring apparatus and system |
| CN110057487A (en) * | 2019-04-19 | 2019-07-26 | 中北大学 | Full ceramics superhigh temperature pressure sensor and its packaging method |
-
2008
- 2008-09-17 CN CNU2008201225290U patent/CN201255677Y/en not_active Expired - Lifetime
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108871664A (en) * | 2018-06-26 | 2018-11-23 | 成都英鑫光电科技有限公司 | Air pressure measuring apparatus and system |
| CN108871664B (en) * | 2018-06-26 | 2024-01-19 | 成都英鑫光电科技有限公司 | Air pressure measuring device and system |
| CN110057487A (en) * | 2019-04-19 | 2019-07-26 | 中北大学 | Full ceramics superhigh temperature pressure sensor and its packaging method |
| CN110057487B (en) * | 2019-04-19 | 2020-12-01 | 中北大学 | Full-ceramic ultra-high temperature pressure sensor and packaging method thereof |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20090610 |