CN201378059Y

CN201378059Y - Motor shaft solid shaft rotary encoder

Info

Publication number: CN201378059Y
Application number: CN200920107333U
Authority: CN
Inventors: 高增雪; 党红文; 金亮; 邹凤欣; 邱忠义; 杨溪林
Original assignee: Beijing Aritime Intelligent Control Co Ltd
Current assignee: Beijing Aritime Intelligent Control Co Ltd
Priority date: 2009-04-15
Filing date: 2009-04-15
Publication date: 2010-01-06
Anticipated expiration: 2019-04-15

Abstract

The utility model discloses a motor shaft solid shaft rotary encoder. The solid shaft rotary encoder uses a rotary transformer as a shaft angle transmitter, the rotary transformer is connected with an intelligent R / D converter plate by an output connecting wire, and then a converted angle-bit data is output by a long-wire transfer-drive cable. A rotor of the rotary transformer is installed on an input shaft of the encoder, and a stator and the intelligent R / D converter plate are critically and firmly installed on a base of the encoder to be sealed by a case to be assembled into the complete integrated solid shaft rotary encoder. The motor shaft solid shaft rotary encoder can adapt to harsh use environment, high temperature, high humidity and large vibration and shock, solves the problem that the encoder depends on an external complex excitation power supply and multi-channel DC power supplies, and achieves the integrated small network design.

Description

Motor shaft solid shaft resolving encoder

Technical field

The utility model relates to a kind of industrial detection technology, more particularly says, is meant the motor shaft solid shaft resolving encoder of a kind of integrated small networking that is applicable under the rugged surroundings, can be used for the measurement of axis angular position and speed and has high end interface.

Background technology

At present, the axis angle measurement device that is most widely used has photo electric axis scrambler and motor shaft encoder.The photo electric axis scrambler is a detecting element with high-precision Fringe of metrological Radial Gratings, converts the position of importing, angle to the corresponding digital code by opto-electronic conversion.Because the core detecting element of photo electric axis scrambler is a photoelectric code disk, and the material of photoelectric code disk mainly contains three kinds: glass, plastics, metal.Vitreous code-disc good temp characteristic, but frangible; The code-disc various aspects of performance of plastics matter is all poor, but low price; Metallic code-disc temperature characterisitic is poor, and environment requirement than higher, has greatly been limited the range of application of photoelectric encoder.Scale method and signal output form according to photoelectric encoder can be divided into incremental encoder and absolute type encoder.Incremental encoder is simple in structure, makes easily.Because its positional information that provides is increment type, so need initial alignment when using.Absolute type encoder is generally all made circulation binary code or Gray code, and directly the absolute position of output rotor does not need to measure initial position, but its complex process, the cost height is realized comparatively difficulty of high resolving power, high precision.

Motor shaft encoder is based on the axis angle measurement device of induction motor, and the most representative in the induction motor is rotary transformer.Rotary transformer is a kind of element that angle of rotor is transformed into the electric signal that becomes a certain funtcional relationship with it.Be equivalent to a rotary transformer on the principle, be equivalent to the two poles of the earth two-phase wire wound asynchronous motor on the structure.The principle of work of rotary transformer has determined it to have the advantage of self uniqueness, and such as being adapted at work under the rugged environment, as vibrations, dust impacts high temperature, environment such as corrosion; Be adapted at working under the situation of high rotating speed and high acceleration; In very wide temperature range, possesses high reliability, high precision and high mechanical property; Possesses high noiseproof feature; Possesses characteristic with the longer distance of analog signal transmission etc.Above characteristics have determined rotary transformer to have range of application very widely, but also can be applicable to the occasion of high precision, high reliability and environment very severe.Because rotary transformer is output as sinusoidal simulating signal,, need the external signal treatment circuit simulating signal could be passed the digital signal that changes needs into so it can not use separately usually.But the shaft angle-digital conversion circuit of existing motor shaft encoder and rotary transformer are splits, need the excitation power supply, the multi-channel dc power supply that provide special in addition, make the circuit complexity, and volume is big and cost an arm and a leg, and use very inconvenient.

For practical application, simple digital signal still can not be directly and other equipment communicate.For example: it is SSI that a lot of industry spot need output interface, or the simulation of 4-20MA output, and other some occasions need the Industrial Ethernet interface or PROFIBUS-DP interface etc.Fieldbus such as Industrial Ethernet, Profibus is used very extensive at industrial control field.All there is the LAN (Local Area Network) control of oneself in the manufacturing enterprise of high-intelligentization, as Industrial Ethernet, and Profibus etc.And existing split type resolving encoder needs to be equipped with in addition these high end interfaces, costs an arm and a leg, and its application is greatly limited, and more and more can not satisfy the requirement of modern industry control.

Summary of the invention

The purpose of this utility model provides a kind of high precision, high reliability, wide range of application, has the miniaturization of high end interface, integrated, networked motor shaft solid shaft resolving encoder.

The utility model is a kind of motor shaft solid shaft resolving encoder that is used for axis angular position and velocity survey, described solid shaft resolving encoder is the shaft angle transmitter with the rotary transformer, be connected with intelligent R/D change-over panel by rotary transformer output connecting line, after the cosine and sine signal that intelligence R/D change-over panel sends rotary transformer converted digital signal to, the data that drive after cable will be changed by long line transmission were exported again.The rotor of rotary transformer is installed on the input shaft of scrambler, and accurate firm being installed on the scrambler support of stator and R/D intelligent conversion plate is with being assembled into complete integrated solid shaft resolving encoder behind the casing sealing.Intelligence R/D change-over panel is provided with R/D (shaft angle-numeral) decoding chip, D/A conversion chip, electric power management circuit, long line transmission chip for driving, dsp chip, SSI module, Industrial Ethernet module, ProfiBus-DP module and CAN bus module, is provided with electrical isolation chip, reverse-connection protection circuit, anti-jamming circuit in addition.Its function of intelligence R/D change-over panel comprises: high power position (10,12,14,16) shaft angle-digital decoding and line output, serial output, analog quantity 4-20mA output, field-bus interface and Industrial Ethernet output.

The utility model uses direct current single supply working method, is used for axis angular position and velocity survey, and its advantage is:

1. adapt to abominable environment for use, high temperature, high humidity, big vibrations and impact;

2. solved complicated field power supply and the multi-channel dc power supply problem of adding that rely on;

3. realized the integrated small design of networked;

4. the module damage that can effectively prevent the power supply reversal connection and cause;

5. described scrambler promptly can be used as absolute encoder and uses, and also can be used as incremental encoder and uses, and also can be used as the shaft angle transmitter and uses, fully the instead of optical photoelectric coder.

Description of drawings

Fig. 1 is the structure diagram of motor shaft solid shaft resolving encoder.

Fig. 2 is the circuit theory diagrams of intelligent R/D change-over panel.

Among the figure:

Embodiment

Below in conjunction with accompanying drawing the utility model is described in further detail.

Referring to shown in Figure 1, motor shaft solid shaft resolving encoder comprises that motor input shaft 1, rotary transformer 2, rotor 3, stator 4, support 5, casing 6, connecting line 7, R/D intelligent conversion plate 8 and long line drive output cable 9.The rotor 3 of described rotary transformer 2 is installed on the input shaft 1 of scrambler, and stator 4 and 8 accurate firm being installed on the scrambler support 5 of R/D intelligent conversion plate are with being assembled into complete integrated solid shaft resolving encoder after casing 6 sealings.This resolving encoder is the shaft angle transmitter with rotary transformer 2, and the output connecting line 7 by rotary transformer 2 is connected with intelligent R/D change-over panel 8, drives the angle bit data of cable 9 after with intelligent R/D change-over panel 8 conversions by long line transmission again and exports.

Described intelligent R/D change-over panel 8 provides the sinusoidal excitation power supply for rotary transformer 2, rotary transformer 2 is under the effect of field power supply, the stator 4 of rotary transformer 2 forms stator field, the mutually orthogonal winding of two covers is arranged on the rotor 3 of rotary transformer 2, this two covers winding construction is identical, induces the signal that becomes the sine and cosine relation with the corner of rotary transformer 2 on these two mutually orthogonal windings respectively.This cosine and sine signal is passed to intelligent R/D change-over panel 8 by the output connecting line 7 of rotary transformer 2, by intelligent R/D change-over panel 8 with this cosine and sine signal be converted to that digital quantity is parallel, serial output, analog quantity 4-20mA output, field-bus interface and Industrial Ethernet output, to satisfy the various needs of Industry Control.

Referring to shown in Figure 2; intelligence R/D change-over panel 8 is provided with R/D (shaft angle-numeral) decoding chip 10, D/A conversion chip 11, electric power management circuit 12, long line transmission chip for driving 13, dsp chip 17, Industrial Ethernet module 18, ProfiBus-DP module 19, CAN bus module 20 and SSI module 21; also be provided with electrical isolation chip 14, reverse-connection protection circuit 15 and anti-jamming circuit 16, all above-mentioned chips are special-purpose integrated chip.R/D decoding chip 10 provides field power supply for rotary transformer 2, and the cosine and sine signal of described R/D decoding chip 10 transformers of spinning in the future 2 is converted to digital signal; D/A conversion chip 11 converts this digital signal to the analog quantity output of 4-20mA.Long line transmission chip for driving 13 can realize the long Distance Transmission problem of digital signal, is used to be output as output of digital quantity D0-D15 parallel port and serial ports output; 14 of electrical isolation chips are in order to prevent the interference of power supply and outer bound pair circuit; Described electric power management circuit 12 provides its required power supply for each integrated chip; 16 of reverse-connection protection circuit 15 and anti-jamming circuits are to provide reverse connecting protection and jamproof function for electric power management circuit 12; Dsp chip 17 is by the serial ports output receiving digital signals of long line transmission chip for driving 13; Extend out bus by it and be connected with ProfiBus-DP module 19, realize the interface output of fieldbus and Industrial Ethernet with Industrial Ethernet module 18; Dsp chip 17 links to each other with SSI module 21 with CAN bus module 20, realizes the function of output of CAN bus and synchronous serial interface.Thereby realize the integrated small design of networked, satisfy the needs of modernization industry control and communication.

Claims

1, a kind of motor shaft solid shaft resolving encoder is characterized in that: comprise that input shaft, rotary transformer, rotor, stator, support, casing, connecting line, intelligent R/D change-over panel and long line drive output cable; Described motor shaft solid shaft resolving encoder sends cosine and sine signal with the rotary transformer for the shaft angle transmitter, intelligence R/D change-over panel is connected with rotary transformer by the output connecting line, convert cosine and sine signal to digital signal, the angle position digital signal output after will changing by long line transmission driving cable again; The rotor of described rotary transformer is installed on the input shaft of scrambler, and stator and R/D intelligent conversion plate are installed on the scrambler support, with being assembled into the solid shaft resolving encoder behind the casing sealing.

2, motor shaft solid shaft resolving encoder according to claim 1, it is characterized in that: described intelligent R/D change-over panel is provided with R/D decoding chip, D/A conversion chip, electric power management circuit, long line transmission chip for driving, electrical isolation chip, reverse-connection protection circuit, dsp chip, Industrial Ethernet module, ProfiBus-DP module, SSI module and CAN bus module, the R/D decoding chip provides field power supply for rotary transformer, and the cosine and sine signal of the transformer of spinning in the future is converted to digital signal; The D/A conversion chip is exported the analog quantity that this digital signal converts 4-20mA to, realizes the long Distance Transmission of signal with duration line transmission chip for driving; Dsp chip is by the serial ports output receiving digital signals of long line transmission chip for driving; Dsp chip extends out bus by it and is connected with the ProfiBus-DP module with the Industrial Ethernet module, realizes the interface output of fieldbus and Industrial Ethernet; Dsp chip links to each other with the SSI module with CAN bus module 20, realizes the function of output of CAN bus and synchronous serial interface; Electric power management circuit provides its required power supply for each integrated chip.

3, motor shaft solid shaft resolving encoder according to claim 2 is characterized in that: also comprise reverse-connection protection circuit and anti-jamming circuit, be connected with electric power management circuit respectively, be used to electric power management circuit that reverse connecting protection and jamproof function are provided.

4, motor shaft solid shaft resolving encoder according to claim 2 is characterized in that: also comprise the electrical isolation chip, the electrical isolation chip is connected with long line transmission chip for driving, prevents extraneous interference to data transmission.