Unlock instant, AI-driven research and patent intelligence for your innovation.
A z-x axis magnetoresistance sensor
What is Al technical title?
Al technical title is built by PatSnap Al team. It summarizes the technical point description of the patent document.
A magnetoresistance sensor, Z-X technology, applied in the field of magnetic sensors, achieves the effect of simple structure, high sensitivity and small size of the sensor
Active Publication Date: 2018-07-03
MULTIDIMENSION TECH CO LTD
View PDF10 Cites 0 Cited by
Summary
Abstract
Description
Claims
Application Information
AI Technical Summary
This helps you quickly interpret patents by identifying the three key elements:
Problems solved by technology
Method used
Benefits of technology
Problems solved by technology
[0004] However, when the period length of gears or multi-poles is large, the two sets of magnetoresistive sensing units in the magnetoresistive sensor are also required to be separated by a large characteristic distance, which poses a challenge to the size and packaging of the magnetoresistive sensor.
Method used
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more
Image
Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
Click on the blue label to locate the original text in one second.
Reading with bidirectional positioning of images and text.
Smart Image
Examples
Experimental program
Comparison scheme
Effect test
Embodiment 1
[0090] Figure 1-6 It is a schematic diagram of the measurement of several common gears, multi-poles and magnetoresistance sensors. figure 1 It is a measurement schematic diagram of a long bar gear and a magnetoresistive sensor, wherein 10 is a long bar gear, including a tooth head 20 and a tooth head gap 21, the distance between the two is the period interval of the long bar gear, and 40 is a gear sensor, It is located on a plane 81 parallel to the tooth top of the elongated gear, and has a certain gap from the tooth top, and also includes a back magnet 3 located on the surface of the gear sensor, wherein the gear sensor 40 is located between the back magnet 3 and the elongated gear 10, Wherein the elongated gear 10 is a soft magnetic alloy material, and the back magnet 3 is a hard magnetic alloy material.
[0091] figure 2 and image 3 There are two forms of measurement schematic diagrams for strip multi-pole and magnetoresistance sensors, among which figure 2 Medium a...
Embodiment 2
[0095] Figure 7 and 8 Respectively, the structure diagrams of traditional gear or multi-pole sensors 100 and 101, wherein the gear or multi-pole sensors 100 and 101 respectively comprise two sensing units 200, 201 and 300 and 301 separated by a characteristic pitch 1 and a characteristic pitch, wherein Figure 7 The two magnetoresistive sensing units 200 and 201 in have X-axis magnetic field sensitive directions Hx1 and Hx2, Figure 8 The two magneto-resistive sensing units 300 and 301 in have Z-axis magnetic field sensitivity directions Hz1 and Hz2. The above is the coordinate representation method under the strip-shaped magnetic pole or gear. For the wheel-shaped gear or magnetic pole, under polar coordinates, its The direction corresponding to the X axis is the Theta angle, and the direction corresponding to the Z axis is the r direction.
[0096] Figure 9 for correspondence Figure 7 and Figure 8 As shown in the signal output diagram of a traditional gear or multi-...
Embodiment 3
[0098] Figure 10It is a structural diagram of a single-chip Z-X magnetoresistance sensor proposed in this application, wherein the single-chip Z-X magnetoresistance sensor 102 includes a single magnetoresistance sensing unit 400, which can respond to the X-axis magnetic field and the Y-axis magnetic field, including X The axis magnetoresistive sensor and the Z axis magnetoresistive sensor, the X and Z axis magnetoresistive sensors have the same magnetic field sensitive area and are interlaced with each other.
[0099] Figure 11 for Figure 1-6 When the different types of gears or multi-pole sensors shown are working, when the gears or multi-poles move relative to the sensor for a periodic distance, the distribution diagram of the X-axis magnetic field component and the Z-axis magnetic field component at the sensor position can be seen. Both the X-axis magnetic field component Bx and the Z-axis magnetic field component Bz have sine and cosine characteristics, and the phase ...
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More
PUM
Login to View More
Abstract
The invention provides a Z-X axis magnetoresistance sensor for measuring parameters of a gear or multiple magnetic poles. The magnetoresistance sensor is a single-chip Z-X axis magnetoresistance sensor, and comprises a substrate in an X-Y plane, long-bar-type soft magnetic flux concentrators arranged on the substrate and magnetoresistance sensing unit strings arranged on the upper or lower surfaces of the soft magnetic flux concentrators and having X-directional magnetic sensitive direction. The magnetoresistance sensing unit strings comprise a reference magnetoresistance sensing unit string arranged on an Y-axis centre line of the soft magnetic flux concentrator, a push magnetoresistance sensing unit string and a pull magnetoresistance sensing unit string, which are arranged at the two sides of the Y-axis centre line and are equidistant to the Y-axis centre line, and a sensitive magnetoresistance sensing unit string arranged between the two soft magnetic flux concentrators, wherein the push and pull magnetoresistance sensing unit strings and the reference and sensitive magnetoresistance sensing unit strings are in stagger arrangement, and are connected into a reference bridge-type X-axis sensor and a push-pull bridge-type Z-axis sensor. The Z-X axis magnetoresistance sensor has the advantages of being simple in sensor structure, high in flexibility, low in power consumption and small in size, and capable of measuring the gear or multiple magnetic poles in any period interval.
Description
technical field [0001] The invention relates to the field of magnetic sensors, in particular to a Z-X axis magnetoresistance sensor. Background technique [0002] Magnetoresistive gears or multi-pole sensors are widely used to measure speed and displacement. The gears include flat strip gears or circular gears. The periodic change of the magnetic field generated on the surface of the magnetoresistive sensor when the tooth root and the tooth top pass through the back magnetic field in turn forms a sinusoidal output signal; while the multi-pole sensor is an incremental encoder, which adopts a planar strip shape or a circle NS-shaped alternating free magnetic poles, the free magnetic poles generate a magnetic field on the magnetoresistive sensor to form a sinusoidal output signal. Usually, when the magnetoresistive sensor outputs two sinusoidal signals with a phase difference of 90 degrees, the output voltage signal has the maximum value. And can determine the position of the ...
Claims
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More
Application Information
Patent Timeline
Application Date:The date an application was filed.
Publication Date:The date a patent or application was officially published.
First Publication Date:The earliest publication date of a patent with the same application number.
Issue Date:Publication date of the patent grant document.
PCT Entry Date:The Entry date of PCT National Phase.
Estimated Expiry Date:The statutory expiry date of a patent right according to the Patent Law, and it is the longest term of protection that the patent right can achieve without the termination of the patent right due to other reasons(Term extension factor has been taken into account ).
Invalid Date:Actual expiry date is based on effective date or publication date of legal transaction data of invalid patent.
Login to View More 
Login to View More