CN112833922A - Multifunctional electromagnetic rotary encoder and detection circuit - Google Patents
Multifunctional electromagnetic rotary encoder and detection circuit Download PDFInfo
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- CN112833922A CN112833922A CN202011618328.1A CN202011618328A CN112833922A CN 112833922 A CN112833922 A CN 112833922A CN 202011618328 A CN202011618328 A CN 202011618328A CN 112833922 A CN112833922 A CN 112833922A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01D—MEASURING NOT SPECIALLY ADAPTED FOR A SPECIFIC VARIABLE; ARRANGEMENTS FOR MEASURING TWO OR MORE VARIABLES NOT COVERED IN A SINGLE OTHER SUBCLASS; TARIFF METERING APPARATUS; MEASURING OR TESTING NOT OTHERWISE PROVIDED FOR
- G01D5/00—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable
- G01D5/12—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable using electric or magnetic means
- G01D5/14—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable using electric or magnetic means influencing the magnitude of a current or voltage
- G01D5/142—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable using electric or magnetic means influencing the magnitude of a current or voltage using Hall-effect devices
- G01D5/145—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable using electric or magnetic means influencing the magnitude of a current or voltage using Hall-effect devices influenced by the relative movement between the Hall device and magnetic fields
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01D—MEASURING NOT SPECIALLY ADAPTED FOR A SPECIFIC VARIABLE; ARRANGEMENTS FOR MEASURING TWO OR MORE VARIABLES NOT COVERED IN A SINGLE OTHER SUBCLASS; TARIFF METERING APPARATUS; MEASURING OR TESTING NOT OTHERWISE PROVIDED FOR
- G01D5/00—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable
- G01D5/12—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable using electric or magnetic means
- G01D5/243—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable using electric or magnetic means influencing the phase or frequency of ac
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Abstract
The utility model provides a multi-functional electromagnetic type rotary encoder, includes a shell, at least one locates the cross section on the shell and at least one locates the installation department on the cross section, and the installation department is used for the erection joint, locates the installation department on the cross section through setting up, and the encoder's of being convenient for on the one hand is fixed to make the installation of encoder more stable, and the other party is convenient for increase other equipment on the shell of encoder and increases the integrated level of equipment, plays the effect of killing two birds with one stone.
Description
Technical Field
The present invention relates to a rotary encoder, and more particularly to a multifunctional electromagnetic rotary encoder and a detection circuit.
Background
An encoder is a device that compiles, converts, and formats signals (e.g., bitstreams) or data into a form of signals that can be communicated, transmitted, and stored. Encoders convert angular or linear displacements, called codewheels, into electrical signals, called coderulers. The encoder can be divided into a contact type and a non-contact type according to a reading mode; encoders can be classified into an incremental type and an absolute type according to their operation principles. The incremental encoder converts displacement into periodic electrical signals, and then converts the electrical signals into counting pulses, and the number of the pulses is used for expressing the magnitude of the displacement. Each position of the absolute encoder corresponds to a certain digital code, so that its representation is only dependent on the start and end positions of the measurement, and not on the intermediate course of the measurement.
Chinese invention patent (application No. 201710196943.X, publication No. CN 107276322B) discloses a motor and a motor with an encoder, a method of manufacturing a motor with an encoder, and a method of replacing an encoder with a motor with an encoder. In the motor with encoder, the positioning of the encoder and the motor in the rotation direction is easily and accurately performed. The encoder in the motor with encoder is removable from the motor. The motor is provided with a positioning pin that fits into a recess provided in the encoder, and the moving member on which the positioning pin is formed can adjust the position in the circumferential direction. A primary motor and a primary encoder are used in the manufacture of a motor with an encoder. The position information of the main encoder is adjusted to be at the original position in a motor locking state of the main motor, the position of the positioning pin is adjusted by the main encoder for a mass production motor, and the position information is corrected by the main motor for the mass production encoder, and the motor with the encoder is completed by assembling the position information and the position information.
Chinese patent application No. 201380075042.5 (publication No. CN 105074392B) discloses a magnetic sensor device capable of obtaining stable detection accuracy even if the ambient temperature changes, and a rotary encoder having the magnetic sensor device. In the magnetic sensor device, a temperature monitoring resistive film made of titanium or the like and a heating resistive film are formed on a substrate on which a magnetic sensitive film made of a magnetoresistive film is formed, a temperature difference and a temperature change from a set temperature are monitored by a resistance value of the temperature monitoring resistive film, and power is supplied to the heating resistive film based on a monitoring result, so that the magnetic sensitive film can be heated to the set temperature. Therefore, stable detection accuracy can be obtained even if the ambient temperature changes.
Disclosure of Invention
The invention provides a multifunctional electromagnetic rotary encoder, which mainly aims to overcome the defect of insufficient detection precision of an encoder.
In order to solve the technical problems, the invention adopts the following technical scheme:
a detection circuit comprises a decoding chip U2, an operational amplifier U3, an LC filter circuit and a rotary variable signal interface J1, wherein the output end of the operational amplifier U3 is electrically connected with the enable end of the decoding chip U2, the output end of the LC filter circuit is electrically connected with the enable end of the decoding chip U2, the output end of the rotary variable signal interface J1 is electrically connected with the enable end of the decoding chip U2, and the input end of the rotary variable signal interface J1 is electrically connected with the output end of a detection ring.
Further, the LC filter circuit includes a coil L3, a capacitor C3 and a capacitor C3, one end of the coil L3 is connected to an EXC positive terminal of the resolver signal interface J3, the other end of the coil L3 is connected to one end of the capacitor C3, one end of the coil L3 is connected to the other end of the capacitor C3, the other end of the coil L3 is connected to an EXC negative terminal of the resolver signal interface J3, a second end of the coil L3 is connected to a SIN positive terminal of the resolver signal interface J3, a first end of the coil L3 is connected to one end of the coil L3, the other end of the coil L3 is connected to a fourth end of the capacitor L3, and the other end of the coil L3 is connected to the capacitor C3, the third electrical terminal of the coil L10 is connected to the SIN negative terminal of the rotary transformer signal interface J1, one end of a capacitor C33 is connected in parallel to the fourth power connection end of the coil L10, the other end of the capacitor C33 is connected in parallel to one end of the capacitor C34 and grounded, the other end of the capacitor C34 is connected in parallel to the first power connection end of the coil L10, the second power connection end of the coil L5 is connected to the COS positive terminal of the rotary transformer signal interface J1, the first power connection end of the coil L5 is connected to one end of the coil L7, the other end of the coil L7 is connected in parallel to one end of the capacitor C21, one end of the coil L6 is connected in parallel to the other end of the capacitor C21, the other end of the coil L6 is connected to the fourth power connection end of the coil L5, one end of the capacitor C10 is connected in parallel to the fourth power connection end of the coil L5, the other end of the capacitor C10 is connected in parallel to one end of the capacitor C9 and grounded, the other end of the capacitor C16 is connected in parallel to the first power connection end of the coil L82.
Further, the device also comprises a resistor R8, a resistor R9 and a resistor R10, one end of the resistor R11, one end of the resistor R12, one end of the resistor R13 and one end of the resistor R12 are connected in parallel to an INA negative terminal pin of the operational amplifier U3, the other end of the resistor R13 is connected to an OA terminal pin of the operational amplifier U3, the other end of the resistor R12 is connected to an EXC positive terminal pin of the decoding chip U2, one end of the resistor R10 is connected to one end of the resistor R11, the other end of the resistor 10 is connected to an INA positive terminal pin of the operational amplifier U3, the other end of the resistor R11 is connected to an INB positive terminal pin of the operational amplifier U3, one end of the resistor R8 and one end of the resistor R2 are connected in parallel to an INB negative terminal pin of the operational amplifier U3, the other end of the resistor R9 is connected to an OB terminal pin of the operational amplifier U3, the other end of the resistor R8 is connected to an EXC negative terminal pin of the decoding chip U2.
Further, the decoding circuit further comprises a capacitor C2, a capacitor C3, a capacitor C4, a capacitor C5, a capacitor C6, a capacitor C7, a resistor R6, a resistor R7, a resistor R14, a resistor R15, a resistor R17, a resistor R19, a resistor R20 and a crystal oscillator X1, wherein one end of the resistor R6 is connected to the CPO output terminal pin of the decoding chip U2, one end of the resistor R15 is connected to the DOS terminal pin of the decoding chip U2, one end of the resistor R20 is connected to the LOT terminal pin of the decoding chip U2, one end of the resistor R19 and one end of the resistor R17 are connected in parallel to one end of the resistor R14, the other end of the resistor R17 is connected to the FS1 terminal pin of the decoding chip U2, the other end of the resistor R1 is connected to the FS1 terminal pin of the decoding chip U1, the other end of the resistor R1 is connected to the RESET terminal of the decoding chip U1, the ground, one end of the capacitor C1 and one end of the capacitor C1 are connected in parallel to the ground, the other end of the capacitor C39 and the other end of the capacitor C36 are connected in parallel to the other end of the capacitor C2, the other end of the capacitor C2 is connected to a reference voltage output end of the decoding chip U2, one end of the capacitor C3 is connected in parallel to one end of the capacitor C36, the other end of the capacitor C3 is connected to a bypass capacitor pin end of the decoding chip U2, one end of the capacitor C4 is connected in parallel to one end of the capacitor C3, the other end of the capacitor C4 is connected in parallel to the other end of the capacitor C3, one end of the capacitor C5 is connected to an XTALOUT pin end of the decoding chip U2, one end of the capacitor C6 is connected to a CLKIN pin end of the decoding chip U2, one end of the crystal X1 is connected in parallel to one end of the capacitor C5, and the other end.
The utility model provides a multi-functional electromagnetic type rotary encoder, includes a shell, an at least cross section and an at least installation department, sets up and locates installation department on the cross section, the fixed of this encoder of being convenient for makes the installation of encoder is more stable.
Further, two adjacent cross sections are arranged perpendicular to each other.
Further, two adjacent cross sections are connected into a whole.
Furthermore, the included angle between two adjacent cross sections is 80-130 degrees.
Further, the shell is fan-shaped, and two radiuses of the fan-shaped are respectively formed by the cross sections.
Further, still include one at least locate motor device in the shell, at least one by motor device driven pivot, one set establish the pivot periphery is along detection ring, an at least detection circuit and one on one side and being used for connecting detection ring with detection circuit's signal line, detection circuit's enable end with detection ring's output looks electricity is connected, signal line's interface input exchanges sinusoidal wave signal transmission extremely detection circuit, signal line output two way sinusoidal wave phase signal extremely detection ring is used for 360 degrees mechanical angle of angular measurement and rotational speed, detection circuit is more than detection circuit.
Compared with the prior art, the invention has the beneficial effects that:
1. the encoder is convenient to fix, so that the encoder is more stably installed, and other equipment is convenient to be added on the shell of the encoder to increase the integration level of equipment assembly, so that the effect of killing two birds with one stone is achieved.
2. In the invention, an alternating-current sine wave signal is input through an interface provided with the signal line and transmitted to the detection circuit, and the signal line outputs two paths of sine wave phase signals to the detection ring for angle measurement of 360-degree mechanical angle and rotation speed, so that the detection precision of the encoder for detecting the angle measurement of 360-degree mechanical angle and rotation speed is improved.
3. In the invention, by arranging the LC filter circuit, the direct current accompanied with a plurality of interference signals passes through the LC filter circuit, most of alternating current interference signals are prevented by the inductor from being absorbed and changed into magnetic induction and heat energy, most of the rest alternating current interference signals are bypassed to the ground by the capacitor, thus the action of the interference signals can be inhibited, and the relatively pure direct current can be obtained at the output end.
4. In the invention, the LC filter circuit and the operational amplifier form a phase margin compensation effect, thereby improving the performance of the operational amplifier during high-frequency operation.
Drawings
FIG. 1 is a schematic structural diagram of the present invention.
Fig. 2 is an exploded view of fig. 1.
Fig. 3 is a circuit diagram of the detection circuit.
Fig. 4 is a circuit diagram of an LC filter circuit.
Detailed Description
The following describes embodiments of the present invention with reference to the drawings.
Referring to fig. 1 and 2, a multifunctional electromagnetic rotary encoder includes a housing 11, at least one motor device 15 disposed in the housing 11, at least one rotating shaft 12 driven by the motor device 15, a detecting ring 13 sleeved on one side of the outer periphery of the rotating shaft 12, at least one detecting circuit, a signal line (not shown in the drawings) for connecting the detecting ring 13 and the detecting circuit, at least one cross section 16 disposed on the housing 11, and at least one mounting portion 14 disposed on the cross section 16, wherein the mounting portion 14 is used for mounting connection, the cross section 16 is parallel to the rotating shaft 12, and in this embodiment, the specific mounting portion 14 is at least one mounting hole 13 disposed on the cross section 16 for mounting, and preferably two mounting holes 13 spaced apart from each other and disposed on the cross section 16.
Referring to fig. 1 and 2, two adjacent cross sections 16 may be disposed perpendicular to each other, the two adjacent cross sections 16 may be connected into a whole, an included angle between the two adjacent cross sections 16 may be 80 to 130 °, and an included angle between the two adjacent cross sections 16 is preferably 90 °.
Referring to fig. 1 and 2, in the present embodiment, the two mounting portions 14 are disposed perpendicular to each other, the two mounting portions 14 are connected into a whole, the housing 11 is a sector, two radii of the sector are respectively formed by the cross sections 16, and two radii of the sector are respectively formed by two adjacent mounting portions 14, an included angle between the two adjacent cross sections 16 is preferably 90 °, so that the two mounting portions 14 are connected to form an L-shaped mounting seat 17.
Referring to fig. 1 and 2, the two mounting portions 14 are connected to form an L-shaped mounting seat 17, which improves the space utilization of the housing 11.
Referring to fig. 1 and 2, the installation portion 14 arranged on the cross section 16 is arranged, so that the encoder can be conveniently fixed, the installation of the encoder is more stable, and other devices can be conveniently added on the shell 11 of the encoder to increase the integration level of equipment assembly, so that the effect of achieving two purposes at one time is achieved.
Referring to fig. 1 and 2, an enable terminal of the detection circuit is electrically connected to an output terminal of the detection ring 13, an ac sine wave signal is input to an interface of a signal line (not shown) and transmitted to the detection circuit, and the signal line (not shown) outputs two sine wave phase signals to the detection ring 13 for angle measurement of 360 degrees of mechanical angle and rotation speed.
Referring to fig. 1 and 2, an ac sine wave signal is input through an interface provided with a signal line (not shown) and transmitted to a detection circuit, and the signal line (not shown) outputs two sine wave phase signals to the detection ring 13 for angle measurement of 360 degrees of mechanical angle and rotational speed, thereby improving detection accuracy of the encoder for detecting the angle measurement of 360 degrees of mechanical angle and rotational speed.
Referring to fig. 3 and 4, the detection circuit includes a decoding chip U2, an operational amplifier U3, an LC filter circuit, a rotary signal interface J1, a resistor R8, a resistor R9, a resistor R10, a resistor R11, a resistor R12, a resistor R13, a capacitor C37, a capacitor C2, a capacitor C3, a capacitor C4, a capacitor C5, a capacitor C6, a capacitor C7, a resistor R6, a resistor R7, a resistor R14, a resistor R15, a resistor R17, a resistor R19, a resistor R20, and a crystal X1. A signal line (not shown) is plugged into the rotary signal interface J1.
Referring to fig. 3 and 4, the output terminal of the operational amplifier U3 is electrically connected to the enable terminal of the decoding chip U2, the output terminal of the LC filter circuit is electrically connected to the enable terminal of the decoding chip U2, the output terminal of the revolute signal interface J1 is electrically connected to the enable terminal of the decoding chip U2, and the input terminal of the revolute signal interface J1 is electrically connected to the output terminal of the detection loop 13.
Referring to fig. 3 and 4, by arranging the LC filter circuit, the dc current accompanied by a plurality of interference signals passes through the LC filter circuit, most of the ac interference signals are prevented by the inductor from being absorbed into magnetic induction and heat energy, and most of the rest is bypassed to the ground by the capacitor, so that the effect of the interference signals can be suppressed, and a relatively pure dc current can be obtained at the output terminal.
Referring to fig. 3 and 4, the LC filter circuit and the operational amplifier form a phase margin compensation effect, improving the performance of the operational amplifier when operating at high frequency.
Referring to fig. 3 and 4, the LC filter circuit includes a coil L3, a coil L4, a coil L5, a coil L6, a coil L7, a coil L8, a coil L9, a coil L10, a capacitor C8, a capacitor C10, a capacitor C16, a capacitor C21, a capacitor C29, a capacitor C33, and a capacitor C34, one end of the coil L4 is connected to the EXC positive terminal of the rotation signal interface J1, the other end of the coil L4 is connected to one end of the capacitor C8, one end of the coil L3 is connected to the other end of the capacitor C8, and the other end of the coil L3 is connected to the EXC negative terminal of the rotation signal interface J1.
Referring to fig. 3 and 4, the second connection end of the coil L10 is connected to the SIN positive terminal of the rotary transformer signal interface J1, the other end of the first connection end of the coil L10 is connected to one end of the coil L9, the other end of the coil L9 is connected to one end of the capacitor C29, one end of the coil L8 is connected to the other end of the capacitor C29, the other end of the coil L8 is connected to the fourth connection end of the coil L10, the third connection end of the coil L10 is connected to the SIN negative terminal of the rotary transformer signal interface J1, one end of the capacitor C33 is connected in parallel to the fourth connection end of the coil L10, the other end of the capacitor C33 is connected in parallel to one end of the capacitor C8 and grounded, the other end of the capacitor C34 is connected in parallel to the first connection end of the coil L10, and the second connection end of the coil L5 is connected to the positive terminal.
Referring to fig. 3 and 4, a first connection end of a coil L5 is connected to one end of a coil L7, the other end of a coil L7 is connected in parallel to one end of a capacitor C21, one end of a coil L6 is connected in parallel to the other end of a capacitor C21, the other end of a coil L6 is connected to a fourth connection end of a coil L5, one end of a capacitor C10 is connected in parallel to a fourth connection end of a coil L5, the other end of a capacitor C10 is connected in parallel to one end of a capacitor C16 and is grounded, the other end of a capacitor C16 is connected in parallel to a first connection end of a coil L5, and a third connection end of a coil L5 is connected to the negative COS end of a rotary transformer signal interface J.
Referring to fig. 3 and 4, one end of a resistor R13 and one end of a resistor R12 are connected in parallel to an INA negative terminal pin of an operational amplifier U3, the other end of the resistor R13 is connected to an OA terminal pin of an operational amplifier U3, the other end of the resistor R12 is connected to an EXC positive terminal pin of a decoding chip U2, one end of a resistor R10 is connected to one end of a resistor R11, the other end of the resistor 10 is connected to an INA positive terminal pin of an operational amplifier U3, the other end of the resistor R11 is connected to an INB positive terminal pin of an operational amplifier U3, one end of a resistor R8 and one end of a resistor R9 are connected in parallel to an INB negative terminal pin of an operational amplifier U3, the other end of a resistor R9 is connected to an OB terminal pin of an operational amplifier U3, the other end of a resistor R8 is connected to an EXC negative terminal pin of the decoding chip U39.
Referring to fig. 3 and 4, one end of the resistor R6 is connected to a CPO output terminal pin of the decoding chip U2, one end of the resistor R15 is connected to a DOS terminal pin of the decoding chip U2, one end of the resistor R20 is connected to a LOT terminal pin of the decoding chip U2, one end of the resistor R19 and one end of the resistor R17 are connected in parallel to one end of the resistor R14, the other end of the resistor R17 is connected to an FS1 terminal pin of the decoding chip U2, the other end of the resistor R19 is connected to an FS2 terminal pin of the decoding chip U2, and the other end of the resistor R14 is connected to a RESET terminal of the decoding chip U2.
Referring to fig. 3 and 4, a ground terminal of the decoding chip U2 is connected in parallel to one end of the resistor R7, the other end of the resistor R7 is connected in ground, one end of the capacitor C39 and one end of the capacitor C36 are connected in parallel to one end of the capacitor C2, the other end of the capacitor C39 and the other end of the capacitor C36 are connected in parallel to the other end of the capacitor C2, the other end of the capacitor C2 is connected to a reference voltage output terminal of the decoding chip U2, one end of the capacitor C3 is connected in parallel to one end of the capacitor C36, the other end of the capacitor C3 is connected to a bypass capacitor pin terminal of the decoding chip U2, one end of the capacitor C4 is connected in parallel to one end of the capacitor C3, the other end of the capacitor C4 is connected in parallel to the other end of the capacitor C3, one end of the capacitor C3 is connected to an XTALOUT pin terminal of the decoding chip U3, one end of the capacitor C3 is connected in parallel to one end of the capacitor C3.
Referring to fig. 3 and 4, the model of the decoding chip U2 is an AD2S1205 analog-to-digital conversion chip, the crystal oscillator X1 is 8.192MHz, the resistor R17 is 0R, the resistor R19 is 0R, the resistor R14 is 5.1K, the resistor R13 is 4.7K, the resistor R12 is 5.1K, the resistor R9 is 4.7K, the resistor R8 is 5.1K, the resistor R10 is 2.2K, the resistor R11 is 2.2K, the resistor R7 is 0R, the resistor R17 is 0R, the capacitor C2 is 100NF, the capacitor C36 is 0UF/16V, the capacitor C3 is 10NF, the capacitor C4 is 10UF/16V, the capacitor C5 is 20pF, the capacitor C7 is 10NF, the capacitor C10 is 102/50V, the capacitor C21 is 1NF, and the capacitor C29 is 1 NF.
The rotary encoder of the present embodiment is a device for magnetically detecting the rotation of the rotary shaft 12 about an axis (around a rotation axis) with respect to a fixed body, the fixed body is fixed to a frame or the like of the motor device 15, and the rotary shaft 12 is used in a state of being connected to a rotation output shaft or the like of the motor device 15. The fixed body has a sensor substrate and a plurality of support members for supporting the sensor substrate, and in this embodiment, the support members are formed of a base body having a bottom plate portion formed with a circular opening portion and a sensor support plate fixed to the base body. The sensor support plate is fixed to a substantially cylindrical body portion by a screw or the like, and the body portion protrudes from an edge portion of the opening portion toward one side L in the rotation axis direction L in the base body. A plurality of terminals protrude from the sensor support plate toward one side L in the rotation axis direction L. A projection, a hole, or the like is formed on an end surface of the main body on the side L in the rotation axis direction L, and the sensor substrate is fixed to the main body by a screw or the like using the hole or the like.
The sensor substrate is accurately fixed in a state of being positioned at a prescribed position by a protrusion or the like. A connector is provided on a surface of the sensor substrate on one side L in the rotation axis direction L. The rotating shaft 12 is a cylindrical member disposed inside the body portion, and a rotation output shaft of the motor and the like are connected to the inside of the cylindrical member by fitting or the like. Thus, the spindle 12 can rotate about the axis.
The rotary encoder according to the present embodiment is provided with two sensor units (a first sensor unit and a second sensor unit) which will be described below. The first sensor portion has a first magnet on the side of the rotating shaft 12, which has a magnetized surface magnetized with one N pole and one S pole in the circumferential direction facing the rotation axis direction L. The first sensor unit includes, on the stationary body side: a first magnetoresistive element facing the magnetization surface of the first magnet on one side L in the rotation axis direction L; a first hall element facing the magnetization surface of the first magnet on one side L in the rotation axis direction L; and a second hall element that faces the magnetized surface of the first magnet on one side L in the rotation axis direction L at a position shifted by a mechanical angle about the rotation central axis with respect to the first hall element.
The second sensor portion has a second magnet on the side of the rotating shaft 12, and has an annular magnetized surface alternately magnetized in the circumferential direction to have a plurality of N-poles and S-poles facing the one side L in the rotation axis direction L at a position radially outward from the first magnet. In the present embodiment, on the magnetized surface of the second magnet, a plurality of tracks magnetized alternately with N and S poles in the circumferential direction are arranged in the radial direction. In this embodiment, the tracks form two columns. In this embodiment, when N is a positive integer, the pole pairs of the N pole and the S pole in the second magnet form N pairs in total.
In this embodiment, the positions of the N pole and the S pole are circumferentially shifted, and the N pole and the S pole are circumferentially shifted by one pole between two tracks. The second sensor unit includes a second magnetoresistive element on the fixed body side, and the second magnetoresistive element faces the magnetization surface of the second magnet on the rotation axis direction side L.
The first magnet and the second magnet rotate around the rotation axis integrally with the shaft 12. The first magnet is formed of a permanent magnet having a disk shape. The second magnet is cylindrical and is disposed radially outward of the first magnet. The first magnet is formed of a bonded magnet or the like as the second magnet. The first magnetoresistive element, the first hall element, the second hall element, and the second magnetoresistive element are all provided on a first surface of the sensor substrate on the other side L in the rotation axis direction L. In the sensor substrate, a first amplifier is provided on a second surface opposite to the first surface at a position overlapping the first magnetoresistive element in a plan view, and the first amplifier is electrically connected to the first magnetoresistive element through a through hole penetrating the sensor substrate. A second amplifier is provided on the second surface at a position overlapping the second magnetoresistive element in a plan view, and the second amplifier is electrically connected to the second magnetoresistive element through a through hole penetrating the sensor substrate. The first hall element and the second hall element are electrically connected to the first amplifier through a through hole penetrating the sensor substrate.
The above description is only an embodiment of the present invention, but the design concept of the present invention is not limited thereto, and any insubstantial modifications made by using the design concept should fall within the scope of infringing the present invention.
Claims (10)
1. A detection circuit, characterized by: the detection circuit comprises a decoding chip U2, an operational amplifier U3, an LC filter circuit and a rotary variable signal interface J1, wherein the LC filter circuit is arranged, direct current with a plurality of interference signals passes through the LC filter circuit, and most of alternating current interference signals are prevented by an inductor from being absorbed into magnetic induction and heat energy.
2. A detection circuit as claimed in claim 1, wherein: the LC filter circuit comprises a coil L3, a coil L4, a coil L5, a coil L6, a coil L7, a coil L8, a coil L9, a coil L10, a capacitor C8, a capacitor C10, a capacitor C16, a capacitor C21, a capacitor C29, a capacitor C33 and a capacitor C34, one end of the coil L4 is connected to the EXC positive terminal of the rotary-change signal interface J1, the other end of the coil L4 is connected to one end of the capacitor C8, one end of the coil L3 is connected to the other end of the capacitor C8, the other end of the coil L3 is connected to the EXC negative terminal of the rotary-change signal interface J1, the second end of the coil L10 is connected to the SIN positive terminal of the rotary-change signal interface J1, the first end of the coil L10 is connected to one end of the coil L9, the other end of the coil L9 is connected to one end of the capacitor C29, one end of the coil L8 is connected to the fourth end of the rotary-change signal interface J8, and the other end of the coil L8 is connected to the SIN positive terminal of the fourth terminal of the coil L, One end of a capacitor C33 is connected in parallel to the fourth power connection end of the coil L10, the other end of the capacitor C33 is connected in parallel to one end of the capacitor C34 and grounded, the other end of the capacitor C34 is connected in parallel to the first power connection end of the coil L10, the second power connection end of the coil L5 is connected to the COS positive terminal of the rotary transformer signal interface J1, the first power connection end of the coil L5 is connected to one end of the coil L7, the other end of the coil L7 is connected in parallel to one end of the capacitor C21, one end of the coil L6 is connected in parallel to the other end of the capacitor C21, the other end of the coil L6 is connected to the fourth power connection end of the coil L5, one end of the capacitor C10 is connected in parallel to the fourth power connection end of the coil L5, the other end of the capacitor C10 is connected in parallel to one end of the capacitor C9 and grounded, the other end of the capacitor C16 is connected in parallel to the first power connection end of the coil L82.
3. A detection circuit as claimed in claim 1, wherein: also comprises a resistor R8, a resistor R9 and a resistor R10, one end of the resistor R11, one end of the resistor R12, one end of the resistor R13 and one end of the resistor R12 are connected in parallel to an INA negative terminal pin of the operational amplifier U3, the other end of the resistor R13 is connected to an OA terminal pin of the operational amplifier U3, the other end of the resistor R12 is connected to an EXC positive terminal pin of the decoding chip U2, one end of the resistor R10 is connected to one end of the resistor R11, the other end of the resistor 10 is connected to an INA positive terminal pin of the operational amplifier U3, the other end of the resistor R11 is connected to an INB positive terminal pin of the operational amplifier U3, one end of the resistor R8 and one end of the resistor R2 are connected in parallel to an INB negative terminal pin of the operational amplifier U3, the other end of the resistor R9 is connected to an OB terminal pin of the operational amplifier U3, the other end of the resistor R8 is connected to an EXC negative terminal pin of the decoding chip U2.
4. A detection circuit as claimed in claim 1, wherein: the decoder also comprises a capacitor C2, a capacitor C3, a capacitor C4, a capacitor C5, a capacitor C6, a capacitor C7, a resistor R6, a resistor R7, a resistor R14, a resistor R15, a resistor R17, a resistor R19, a resistor R20 and a crystal oscillator X1, wherein one end of a resistor R6 is connected with a CPO output terminal pin of a decoding chip U2, one end of a resistor R15 is connected with a DOS terminal pin of the decoding chip U2, one end of a resistor R20 is connected with a LOT terminal pin of the decoding chip U2, one end of the resistor R2 and one end of the resistor R2 are connected in parallel with one end of the resistor R2, the other end of the resistor R2 is connected with a FS2 terminal pin of the decoding chip U2, the other end of the resistor R2 is connected with a RESET terminal of the decoding chip U2, the grounding terminal of the decoding chip U2 is connected with the other end of the capacitor C2 in parallel with the capacitor C2, the other end of the capacitor C2 and the capacitor C2, the other end of the capacitor C2 is connected to the reference voltage output end of the decoding chip U2, one end of the capacitor C3 is connected in parallel to one end of the capacitor C36, the other end of the capacitor C3 is connected to the bypass capacitor pin end of the decoding chip U2, one end of the capacitor C4 is connected in parallel to one end of the capacitor C3, the other end of the capacitor C4 is connected in parallel to the other end of the capacitor C3, one end of the capacitor C5 is connected to the XTALOUT pin end of the decoding chip U2, one end of the capacitor C6 is connected to the CLKIN pin end of the decoding chip U2, one end of the crystal oscillator X1 is connected in parallel to one end of the capacitor C5, and the other end of the crystal oscillator X1 is connected in parallel.
5. A multifunctional electromagnetic rotary encoder is characterized in that: including a shell, an at least cross section and an at least installation department, set up and locate installation department on the cross section, the fixed of this encoder of being convenient for makes the installation of encoder is more stable.
6. The multifunctional electromagnetic rotary encoder according to claim 5, characterized in that: two adjacent cross sections are arranged perpendicular to each other.
7. The multifunctional electromagnetic rotary encoder according to claim 5, characterized in that: two adjacent cross sections are connected into a whole.
8. The multifunctional electromagnetic rotary encoder according to claim 5, characterized in that: the included angle between two adjacent cross sections is 80-130 degrees.
9. The multifunctional electromagnetic rotary encoder according to claim 5, characterized in that: the shell is fan-shaped, and two radiuses of the fan-shaped are respectively formed by the cross sections.
10. The multifunctional electromagnetic rotary encoder according to claim 5, characterized in that: still include one locate motor device in the shell, at least one by motor device driven pivot, one set establish the pivot periphery is along detection ring on one side, an at least detection circuit and one be used for connecting detection ring with detection circuit's signal line, detection circuit's enable end with detection ring's output looks electricity is connected, signal line's interface input exchanges sinusoidal wave signal transmission to detection circuit, signal line output two ways sinusoidal wave phase signal extremely detection ring is used for 360 degrees mechanical angle of angular measurement and rotational speed, detection circuit is for any one in claims 1 to 4 detection circuit.
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| CN202011618328.1A CN112833922A (en) | 2020-12-31 | 2020-12-31 | Multifunctional electromagnetic rotary encoder and detection circuit |
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