CN2358440Y - Magnetic disturbance-resisting signalling gas meter - Google Patents
Magnetic disturbance-resisting signalling gas meter Download PDFInfo
- Publication number
- CN2358440Y CN2358440Y CN 98251920 CN98251920U CN2358440Y CN 2358440 Y CN2358440 Y CN 2358440Y CN 98251920 CN98251920 CN 98251920 CN 98251920 U CN98251920 U CN 98251920U CN 2358440 Y CN2358440 Y CN 2358440Y
- Authority
- CN
- China
- Prior art keywords
- gas meter
- magnetic
- magnetic shielding
- meter
- flow meter
- 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 discloses a magnetic interference resisting signaling gas meter which belongs to a magnetic-sensitive sensing type signaling gas meter which is provided with an antimagnetic device which can resist the external intense magnetic field interference. A magnetic shielding cavity is composed of one or a plurality of magnetic shielding covers, and a magnetic-sensitive sensor and a working permanent magnet are arranged in the magnetic shielding cavity and can effectively weaken the interference of the external intense magnetic field and work normally. The performance of diamagnetic interference of the signaling gas meter of the utility model is good, and the electric pulse of the generated gas consumption has no electric consumption. The antimagnetic device has the advantages of simple structure and low cost, and the utility model is particularly suitable for a battery powered IC card gas meter device and an automatic meter reading system.
Description
The utility model relates to gas meter, flow meter, exactly is to use post a letter gas meter, flow meter and the magnetic thereof of magneto-dependent sensor to cover the screen technology.
The gas meter, flow meter of posting a letter is a kind of gas meter, flow meter that can send with the proportional electric impulse signal of gas flow, be the measurement basis parts that IC-card prepayment diaphragm gas meter system and gas meter, flow meter are concentrated automatic data logging meter (receipts) charge system, normally on common deaphragm gas meter, install magneto-dependent sensor and work permanent magnet formation additional.Its principle of work is: installment work permanent magnet on deaphragm gas meter reading print-wheel assembly related rotation part, when fixing nigh magneto-dependent sensor is experienced the variation of the work magnetic field of permanent magnet that moves with rotational parts, just the flow electric impulse signal can take place.
Yet, the sensor-type fatal defective of gas meter, flow meter product ubiquity of posting a letter of existing various magnetosensitives---defence magnetic interference poor ability.When outside high-intensity magnetic field interference source when the gas meter, flow meter, can disturb the normal gage work of gas meter, flow meter in two ways, the one, act on magneto-dependent sensor, make sensor stop sender; The 2nd, act on the work permanent magnet, the print-wheel assembly motion is obstructed.Especially: this gas meter, flow meter disturbs high-intensity magnetic field and usurps combustion gas and be difficult to take precautions against, and becomes a big obstacle of practicability.In addition, tongue tube magnetosensitive switch commonly used has mechanical contact, have mechanical arm metal remanent magnetism, lowly harden poor flexibility, the malfunctioning situation of action, and the shake of work magnet may produce the malfunction signal, its glass tube is frangible when installing and transport, and these all become the factor that influences reliability.
The purpose of this utility model is: a kind of high diamagnetic interference gas meter, flow meter of posting a letter is provided, it has magnetism preventing device simple in structure, with low cost, can overcome the shortcoming of the existing antimagnetic poor performance of gas meter, flow meter effectively, but guarantee electronic gas table operate as normal still under non-industrial high-intensity magnetic field disturbs.
The novel technical solution of this reality is: a kind of gas meter, flow meter of posting a letter, and it has a cover magnetism preventing device, constitutes the magnetic shielding chamber by magnetic shielding cover, and magneto-dependent sensor and work permanent magnet are arranged in the magnetic shielding chamber.Magnetic shielding cover is to be circular or polygonal tubular article with the xsect that magnetic conductivity sheet material (as iron plate etc.) is made; The magnetic shielding cover that constitutes the magnetic shielding chamber can be that one or more are nestable, and the space is the magnetic shielding chamber in the inner most magnetic shielding cover tube, and magneto-dependent sensor in the chamber and work permanent magnet are carried out magnetic shielding; The preferred zero power consumption magneto-dependent sensor of magneto-dependent sensor.
The post a letter magnetism preventing device of gas meter, flow meter of the utility model makes the external magnetic field interference source weaken greatly the effect of magneto-dependent sensor and work permanent magnet, and gas meter, flow meter is normally posted a letter and accurately metering and unlikely influence is posted a letter.In addition, it adopts the zero power consumption magneto-dependent sensor of no mechanical contact, the solid-state anti-encapsulation of shaking, produce the not power consumption of gas flow electric impulse signal, be particularly suitable for devices such as battery powered IC-card gas meter, flow meter, and output pulse amplitude and width substantially constant, do not change, do not have the above-mentioned shortcoming of tongue tube fully, further improved the reliability of the gas meter, flow meter of posting a letter with work magnet rotating speed.And magnetism preventing device is simple in structure, and is with low cost, and goal of the invention is reached.
Fig. 1 is a gas meter;
Fig. 2 is a magnetism preventing device of the present utility model.
The utility model can further specify by following examples.The gas meter, flow meter of posting a letter shown in Figure 1 is made up of common deaphragm gas meter 6 and the work permanent magnet and the fixing nigh sensor that are installed on its reading print-wheel assembly 4 related rotation parts.This magnetism preventing device shown in Figure 2 is made of 1 cylindric magnetic shielding cover 1, cylinder interior is magnetic shielding chamber 2, magneto-dependent sensor 3 (present embodiment is used to be: " zero power consumption magneto-dependent sensor " who does not consume any power source) and the work permanent magnet 5 that is installed on the gas meter, flow meter print-wheel assembly rotational parts 4 all be in the magnetic shielding chamber 2.It is 30 cubic centimetres, surface magnetic flux density greater than 4000 Gausses' Nd-Fe-B permanent magnet as outside high-intensity magnetic field interference source that embodiment uses a block long-pending, when it is clinged to any part of gas meter, flow meter, zero power consumption magneto-dependent sensor post a letter and the work of gas meter, flow meter all keeps normal, be not subjected to magnetic interference, the gas meter, flow meter variable that guaranteed to post a letter externally also meets the relevant measurement standard of gas meter, flow meter under the disturbed condition of high-intensity magnetic field source.
The utility model magnetism preventing device is applicable to the civilian or industrial gas meter, flow meter of posting a letter of all size, can be applicable to IC-card prepayment diaphragm gas meter or automatic meter reading system gas meter, flow meter.Magnetic shielding cover shape, size and gas meter, flow meter structure adapt, and the number of packages in magnetic shielding cover material and formation magnetic shielding chamber is decided on the magnetic shielding degree of requirement, and number of packages is many more, and the magnetic shielding ability is strong more.
The evaluation of the anti-magnetic property of gas meter, flow meter does not still have national standard, the utility model magnetism preventing device guarantees to post a letter gas meter, flow meter can operate as normal under non-industrialness high-intensity magnetic field disturbs, and means the interference to the gas meter, flow meter of posting a letter of the high-intensity magnetic field interference source (as: various permanent magnet) that can defend vast gas meter, flow meter user to start with.The Nd-Fe-B permanent magnet that the utility model embodiment uses belongs to the high-intensity magnetic field interference source that the general user is difficult to start with, in order to anti-magnetic property of the present utility model is carried out more strict test.
Claims (4)
1, a kind of diamagnetic interference gas meter, flow meter of posting a letter is characterized in that: have a cover magnetism preventing device, constitute magnetic shielding chamber (2) by magnetic shielding cover (1), the magneto-dependent sensor (3) and the permanent magnet (5) of working are positioned at the magnetic shielding chamber.
2, the gas meter, flow meter of posting a letter according to claim 1 is characterized in that: the shape of magnetic shielding cover is that xsect is circular or polygonal tubular, and material is a magnetic conductivity sheet material.
3, the gas meter, flow meter of posting a letter according to claim 1 is characterized in that: the quantity that constitutes the magnetic shielding cover in magnetic shielding chamber is one or more.
4, the gas meter, flow meter of posting a letter according to claim 1 is characterized in that: the preferred zero power consumption magneto-dependent sensor of magneto-dependent sensor (3).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 98251920 CN2358440Y (en) | 1998-12-23 | 1998-12-23 | Magnetic disturbance-resisting signalling gas meter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 98251920 CN2358440Y (en) | 1998-12-23 | 1998-12-23 | Magnetic disturbance-resisting signalling gas meter |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2358440Y true CN2358440Y (en) | 2000-01-12 |
Family
ID=33995712
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 98251920 Expired - Fee Related CN2358440Y (en) | 1998-12-23 | 1998-12-23 | Magnetic disturbance-resisting signalling gas meter |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2358440Y (en) |
-
1998
- 1998-12-23 CN CN 98251920 patent/CN2358440Y/en not_active Expired - Fee Related
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |