CN100368777C

CN100368777C - Electronic zeroing method for photoelectric rotary encoder

Info

Publication number: CN100368777C
Application number: CNB2004100111547A
Authority: CN
Inventors: 张泽宇; 盖竹秋
Original assignee: Changchun Institute of Optics Fine Mechanics and Physics of CAS
Current assignee: Changchun Institute of Optics Fine Mechanics and Physics of CAS
Priority date: 2004-10-15
Filing date: 2004-10-15
Publication date: 2008-02-13
Anticipated expiration: 2024-10-15
Also published as: CN1731096A

Abstract

The present invention relates to an electronic zeroing method of a photoelectric shaft angle encoder, particularly to an electronic zeroing method which belongs to the technical field of photoelectric measurement. The present invention solves the technical problem of providing an electronic zeroing method of a photoelectric shaft angle encoder. The present invention has the first step that an electronic zeroing circuit comprising a memory storing device, a reset switch, an upper pulling resistor and a single chip computer is designed. A chip selecting end CS, a clock interface SK, a writing-in end DI and an output end DO are arranged on the memory storing device. One end of the reset switch is grounded, and the other end is connected with the P1 opening of the single chip computer. The upper pulling resistor is arranged on the P1 opening line of the reset switch, and the other end of the upper pulling resistor is connected with a power supply of 5V. The signal chip computer is provided with input/output (I/O) interfaces of P1 to P5, the P1 interface is communicated with the resistance end of the reset switch, and the P2 interface, the P3 interface, the P4 interface and the P5 interface are respectively communicated with the chip selecting end CS, the clock interface SK, the writing-in end DI and the output end DO of the memory storing device. The present invention has the second step that the electronic zeroing circuit is controlled according to the designed electronic zeroing control program to obtain a zero clearing function. The method has the advantages of quick and convenient regulation and high accuracy.

Description

A kind of electronics adjusting zero method of optical electric axial angle encoder

One, technical field

The invention belongs to the electronics adjusting zero method that relates to a kind of optical electric axial angle encoder in the photoelectric measurement technical field.

Two, technical background

Optical electric axial angle encoder is the representational optoelectronic sensor of photoelectric measurement angular displacement, when the application optical electric axial angle encoder is measured, the code-disc null position that often exists optical electric axial angle encoder does not overlap with the rotating shaft null position of measuring system and exists angle to be worth phenomenon partially, thereby the angle displacement amount of the rotating shaft of the measuring system that has caused measuring is inaccurate, makes measuring accuracy meaningless.Therefore, when using the angular displacement of optical electric axial angle encoder measurement rotating shaft, must accomplish to make the code-disc zero-bit of optical electric axial angle encoder to align earlier with the zero-bit of measuring system rotating shaft.

Adopt the control of electronic circuit, can accomplish the zero-bit alignment of code-disc zero-bit and measuring system rotating shaft, and then the precision and the reliability of angle measurement have been guaranteed, the prior art the most approaching with the present invention is the utility model patent of Changchun Institute of Optics, Fine Mechanics and Physics, CAS, the patent No. is ZL96247089.9, name is called " a kind of electronics zeroing circuit of photoelectric encoder " as shown in Figure 1, comprise power supply 1, plucking number sign switch 2, pull-up resistor 3, counting circuit 4, code output terminal 5, counting circuit output terminal 6, digital processing system 7;

How many positions this circuit structure complexity, scrambler have, and just establish what plucking number sign switches and are equipped with what upper resistance, and manual operation is pretty troublesome, and is time-consuming, easily pulls out mistake, and zeroing is inconvenient.

Three, summary of the invention

In order to overcome the defective that prior art exists, it is efficient and convenient to the objective of the invention is to return to zero, and improves accuracy, and the spy sets up a kind of electronics adjusting zero method of optical electric axial angle encoder.

The technical problem to be solved in the present invention is: the electronics adjusting zero method that a kind of optical electric axial angle encoder is provided.The technical scheme of technical solution problem is: the electronics zeroing circuit of design as shown in Figure 2, comprises mnemonic 8, reset switch 9, pull-up resistor 10, single-chip microcomputer 11; On mnemonic 8, be provided with sheet choosing end CS, clock interface SK, write end DI, output terminal DO.CS is only effective when low level " 0 " for sheet choosing end, and mnemonic 8 is started working; Clock interface SK when single-chip microcomputer 11 carries out read-write operation, carries clock signal toward mnemonic 8; Write end DI, single-chip microcomputer 11 is when write operation, toward mnemonic 8 serial-shifts input data; Output terminal DO, single-chip microcomputer 11 give single-chip microcomputer 11 by mnemonic 8 output datas when mnemonic 8 is carried out read operation.One end ground connection of reset switch 9, the other end meets the P of single-chip microcomputer 11 ₁Mouthful, reset switch 9 is high ordinary telegram flat " 1 " when disconnecting, storage all is primary data in the mnemonic 8, reset switch 9 is low level " 0 " when connecting, the current data value of optical electric axial angle encoder is deposited in the mnemonic 8, and the primary data in the mnemonic 8 refreshed, at the P of reset switch 9 ₁Install pull-up resistor 10 additional, another termination 5V power supply of pull-up resistor 10 on the mouth line.It is P that single-chip microcomputer 11 is provided with input and output (I/O) interface ₁Mouth, P ₂Mouth, P ₃Mouth, P ₄Mouth, P ₅Mouthful, P ₁Mouth is connected P with the power end of reset switch 9 ₂Mouth holds CS to connect P with the sheet choosing of mnemonic 8 ₃Mouthful with the interface clock signal SK of mnemonic 8 connection, P ₄Mouth holds DI to connect P with writing of mnemonic 8 ₅Mouthful with the output terminal DO of mnemonic 8 connection.

The execution electronics zeroing control program of design as shown in Figure 3, is used for controlling the electronics zeroing circuit, after program begins at first by the P of single-chip microcomputer 11 ₂Mouth starts mnemonic 8, P by sheet choosing end CS ₃Mouth provides clock signal by the clock interface SK of mnemonic 8, this moment, single-chip microcomputer 11 read the angular deviation value in the mnemonic 8 one time by the output terminal DO serial-shift of mnemonic 8, if it deposits in for H in the address of EPROM program storage of single-chip microcomputer 11, read self current angle value of optical electric axial angle encoder then, if it is K, again to P ₁The state of mouth is judged, works as P ₁When mouth was high level " 1 ", expression did not need zero clearing, still uses original angular deviation value H, obtains corresponding mechanical zero angle value; Work as P ₁When mouth was low level " ", expression needed zero clearing, and single-chip microcomputer 11 enters the subroutine of write operation, and CS starts mnemonic 8 by sheet choosing end, and by P ₃Mouth provides clock signal by clock interface SK for mnemonic 8, at this moment the P of single-chip microcomputer 11 ₄Mouthful with the serial-shift mode self current angle value K of optical electric axial angle encoder is write in the mnemonic 8 by writing end DI, as new angular deviation value H, get back to master routine then, self the angle value K current with optical electric axial angle encoder deducts angular deviation value H, because the K=H of this moment, draw the angle value of corresponding mechanical zero, K-H=0 reaches the effect of zero clearing.

Good effect of the present invention: in this method, circuit structure is simple, and size is little, implements control by software program, and it is efficient and convenient to return to zero, and has improved speed, is difficult for makeing mistakes good stability, accuracy height.

Four, description of drawings

Fig. 1 is a zeroing circuit structural representation in the prior art, and Fig. 2 is the structural representation of the electronics zeroing circuit in the inventive method, and Fig. 3 is the control program process flow diagram of the inventive method.

Five, embodiment

The inventive method is by the structural design circuit of first step electronics zeroing circuit, again by the second control program control circuit that goes on foot, in electronics zeroing circuit structure, cause the angular deviation value to be lost when preventing unexpected power down or switch, mnemonic 8 is selected the 93C66 storer for use, single-chip microcomputer adopts 8751 single-chip microcomputers, and the resistance of pull-up resistor 10 adopts 1-10K, and earthing power supply voltage is 5V.

Claims

1. the electronics adjusting zero method of an optical electric axial angle encoder, realize by the electronics zeroing circuit, it is characterized in that also comprising the execution zeroing control program of design, control electronics zeroing circuit, this electronics zeroing circuit comprises mnemonic (8), reset switch (9), pull-up resistor (10), single-chip microcomputer (11); On mnemonic (8), be provided with sheet choosing end CS, clock interface SK, write end DI, output terminal DO, CS is only effective when low level " 0 " for sheet choosing end, and mnemonic (8) is started working; Clock interface SK when single-chip microcomputer (11) carries out read-write operation, carries clock signal toward mnemonic (8); Write end DI, single-chip microcomputer (11) is when write operation, toward mnemonic (8) serial-shift input data; Output terminal DO, single-chip microcomputer (11) give single-chip microcomputer (11) by mnemonic (8) output data when mnemonic (8) is carried out read operation, an end ground connection of reset switch (9), and the other end meets the P of single-chip microcomputer (11) ₁Mouthful, reset switch (9) is high ordinary telegram flat " 1 " when disconnecting, to storage in the mnemonic (8) all is primary data, reset switch (9) is low level " 0 " when connecting, the current data value of optical electric axial angle encoder is deposited in the mnemonic (8), and the primary data in the mnemonic (8) refreshed the P in reset switch (9) ₁Install pull-up resistor (10) additional on the mouth line, another termination 5V power supply of pull-up resistor (10), it is P that single-chip microcomputer (11) is provided with input and output (I/O) interface ₁Mouth, P ₂Mouth, P ₃Mouth, P ₄Mouth, P ₅Mouthful, P ₁Mouth is connected P with the power end of reset switch (9) ₂Mouth holds CS to connect P with the sheet choosing of mnemonic (8) ₃Mouthful with the clock interface SK of mnemonic (8) connection, P ₄Mouth holds DI to connect P with writing of mnemonic (8) ₅Mouthful with the output terminal DO of mnemonic (8) connection; The execution electronics zeroing control program of design is controlled the electronics zeroing circuit, after program begins at first by the P of single-chip microcomputer (11) ₂Mouth starts mnemonic (8), P by sheet choosing end CS ₃Mouth provides clock signal by the clock interface SK of mnemonic (8), the output terminal DO serial-shift of single-chip microcomputer this moment (11) by mnemonic (8) reads the angular deviation value in the mnemonic (8), if it deposits in for H in the address of EPROM program storage of single-chip microcomputer (11), read self current angle value of optical electric axial angle encoder then, if it is K, again to P ₁The state of mouth is judged, works as P ₁When mouth was high level " 1 ", expression did not need zero clearing, still uses original angular deviation value H, obtains corresponding mechanical zero angle value; Work as P ₁When mouth was low level " 0 ", expression needed zero clearing, and single-chip microcomputer 11 enters the subroutine of write operation, and CS starts mnemonic (8) by sheet choosing end, and by P ₃Mouth is that mnemonic (8) provides clock signal by clock interface SK, the P of single-chip microcomputer this moment (11) ₄Mouthful with the serial-shift mode self current angle value K of optical electric axial angle encoder is write in the mnemonic (8) by writing end DI, as new angular deviation value H, get back to master routine then, self the angle value K current with optical electric axial angle encoder deducts angular deviation value H, because the K=H of this moment, draw the angle value of corresponding mechanical zero, K-H=0 reaches the effect of zero clearing.