Non-contact magnetic resistance rotation detection sampling device for water meter

Abstract

The utility model discloses a non-contact magnetic resistance rotation detection sampling device for a water meter, which comprises a permanent magnet arranged on a rotating body and a magnetic resistance sensor horizontally arranged on one side of the permanent magnet at a fixed interval, and the magnetic resistance sensor is connected with a signal processing unit. According to the utility model, signal acquisition is carried out in a non-contact manner of the magnetoresistive sensor and the permanent magnet, and the magnetoresistive sensor is not contacted with the rotating body, thereby reducing abrasion and prolonging service life; the magnetoresistive sensor and the permanent magnet are horizontally arranged at intervals, installation is easy, the problem that observation is inconvenient when the magnetoresistive sensor and the permanent magnet are vertically arranged is solved, and meanwhile the magnetoresistive sensor is easy to disassemble relative to the whole water meter and convenient to maintain or replace.

Description

Technical Field

[0001] The utility model relates to the technical field of water meters, in particular to a non-contact magnetic resistance rotation detection sampling device for water meters. Background Art

[0002] In the field of water meter control signal acquisition, accurately measuring the speed and direction of rotating components is crucial to ensuring system stability and safety. Traditional contact sensors are prone to wear and have high maintenance costs, while non-contact devices such as photoelectric encoders may be affected by factors such as dust and oil, reducing their accuracy. As a new type of non-contact detection method, magnetoresistive (MR) sensors have the advantages of strong anti-interference ability, fast response speed, and high reliability, showing great potential in rotation detection. The non-contact rotation detection method in the prior art, such as that shown in the utility model application numbers 201220749916.3 and 201922173893.0, has a magnetoresistive structure and a magnetoresistive sensor arranged in the vertical direction. It is greatly affected by environmental factors and it is difficult to accurately obtain rotation direction and speed information at the same time. Utility Model Content

[0003] The purpose of the present invention is to address the deficiencies in the above-mentioned background technology and to provide a radial sampling device based on magnetoresistance effect, which can accurately detect the rotation direction and speed of a rotating body in a non-contact manner.

[0004] To achieve the above objectives, the present invention provides a non-contact magnetic resistance rotation detection sampling device for water meters, which adopts the following technical solutions:

[0005] A non-contact magnetoresistive rotation detection sampling device for a water meter comprises a permanent magnet arranged on a rotating body and a magnetoresistive sensor arranged horizontally on one side of the permanent magnet at a fixed interval. The magnetoresistive sensor is connected to a signal processing unit.

[0006] A further improvement of the non-contact magnetic resistance rotation detection sampling device for a water meter of the utility model is that the number of permanent magnets is an even number, at least two are provided, and are evenly circumferentially arranged on the rotating body.

[0007] A further improvement of the non-contact magnetic resistance rotation detection sampling device for water meters of the utility model is that at least two groups of magnetic resistance sensors are provided and evenly arranged on an annular plate, and the annular plate is radially arranged around the axis of the rotating body.

[0008] The utility model provides a further improvement of a non-contact magnetic resistance rotation detection sampling device for a water meter in that a rotating body, a magnetic resistance sensor, and a signal processing unit are installed in the water meter. The water meter includes a shell, which includes a lower shell. A water meter body is arranged in the lower shell. An upper shell is also provided above the lower shell. A notch is provided on the upper end surface of the upper shell for the instrument surface of the water meter body to pass through. The rotating body is arranged in the water meter body, and the annular plate and the signal processing unit are arranged on the upper shell.

[0009] A further improvement of the non-contact magnetic resistance rotation detection sampling device for a water meter in the utility model is that the upper shell includes a front shell and a rear shell that are detachably connected, the notch is arranged on the front shell, and the annular plate and the signal processing unit are arranged on the rear shell.

[0010] A further improvement of the non-contact magnetic resistance rotation detection sampling device for a water meter of the utility model is that the rotating body and the magnetic resistance sensor are arranged at the same height.

[0011] Compared with the prior art, the beneficial effects of the present invention are:

[0012] The utility model adopts a non-contact method of magnetoresistive sensor and permanent magnet to collect signals, and does not contact with the rotating body, thereby reducing wear and extending service life; the magnetoresistive sensor and permanent magnet are arranged horizontally and spaced apart, which is easy to install and reduces the inconvenience of observation when arranged up and down. At the same time, the magnetoresistive sensor is easy to disassemble relative to the water meter as a whole, and is also convenient for maintenance or replacement. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 This is a structural diagram of the layout of the magnetoresistive sensor and the permanent magnet of the utility model;

[0014] Figure 2 、 3 It is a structural diagram of the utility model;

[0015] In the figure: 1 rotating body, 2 permanent magnet, 3 magnetoresistive sensor, 4 lower shell, 5 front shell, 6 rear shell, 7 water meter body, 8 fixing plate. DETAILED DESCRIPTION

[0016] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0017] like Figure 1As shown, a non-contact magnetoresistive rotation detection sampling device for a water meter includes a permanent magnet 2 arranged on a rotating body 1, and a magnetoresistive sensor 3 arranged horizontally on one side of the permanent magnet with a fixed spacing, and the magnetoresistive sensor is connected to a signal processing unit.

[0018] Preferably, the number of permanent magnets is even, with at least two provided, evenly distributed circumferentially around the rotating body. At least two groups of magnetoresistive sensors are provided, evenly distributed on an annular plate radially arranged around the axis of the rotating body. The annular plate can also be replaced by a flat fixed plate 8.

[0019] like Figure 2 、 3 As shown, further, the rotating body, the magnetoresistive sensor, and the signal processing unit are installed in the water meter. The water meter includes a shell, which includes a lower shell 4. A water meter body 7 is provided in the lower shell. An upper shell is also provided above the lower shell. A notch is provided on the upper end surface of the upper shell for the instrument surface of the water meter body to pass through. The rotating body is arranged in the water meter body, and the annular plate and the signal processing unit are arranged on the upper shell.

[0020] Furthermore, the upper housing includes a detachably connected front housing 5 and a rear housing 6, the notch is arranged on the front housing, the annular plate and the signal processing unit are arranged on the rear housing, and the rotating body and the magnetoresistive sensor are arranged at the same height.

[0021] The working principle of the utility model is: when the water meter is working, the rotating body will be driven to rotate, the magnetoresistive sensor senses the permanent magnet on the rotating body, generates a signal to the signal processing unit, and transmits the data to the outside world.

[0022] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above and that the present invention can be implemented in other specific forms without departing from the spirit or essential characteristics of the present invention. Therefore, the embodiments should be considered in all respects as illustrative and non-restrictive, and the scope of the present invention is defined by the appended claims, not the foregoing description, and all variations within the meaning and range of equivalents of the claims are intended to be encompassed within the present invention. Any reference sign in a claim should not be construed as limiting the claim to which it relates.

Claims

1. A non-contact magnetic resistance rotation detection sampling device for water meters, characterized by: The invention comprises a permanent magnet arranged on a rotating body, and a magnetoresistive sensor arranged horizontally on one side of the permanent magnet with a fixed spacing, and the magnetoresistive sensor is connected to a signal processing unit.

2. The non-contact magnetic resistance rotation detection sampling device for water meters according to claim 1, characterized in that: The number of the permanent magnets is an even number, at least two of which are evenly circumferentially arranged on the rotating body.

3. The non-contact magnetic resistance rotation detection sampling device for water meters according to claim 2, characterized in that: At least two groups of magnetoresistive sensors are provided and are evenly arranged on an annular plate. The annular plate is radially arranged around the axis of the rotating body.

4. The non-contact magnetic resistance rotation detection sampling device for a water meter according to claim 3, characterized in that: The rotating body, magnetoresistive sensor, and signal processing unit are installed in the water meter. The water meter includes a shell, which includes a lower shell. The water meter body is arranged in the lower shell. An upper shell is also provided on the upper part of the lower shell. A notch is provided on the upper end surface of the upper shell for the instrument surface of the water meter body to pass through. The rotating body is arranged in the water meter body, and the annular plate and signal processing unit are arranged on the upper shell.

5. The non-contact magnetic resistance rotation detection sampling device for water meters according to claim 4, characterized in that: The upper shell includes a front shell and a rear shell that are detachably connected. The notch is arranged on the front shell, and the annular plate and the signal processing unit are arranged on the rear shell.

6. The non-contact magnetic resistance rotation detection sampling device for water meters according to claim 5, characterized in that: The rotating body and the magnetoresistive sensor are arranged at the same height.

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