CN100368777C

CN100368777C - An Electronic Zeroing Method of Photoelectric Shaft Angle 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 invention relates to an electronic zero adjustment method of a photoelectric shaft angle encoder, which belongs to the electronic zero adjustment method involved in the technical field of photoelectric measurement. The technical problem to be solved by the present invention is to provide an electronic zero-adjustment method for a photoelectric shaft-angle encoder. There are chip select terminal CS, clock interface SK, write terminal DI and output terminal DO; one end of the reset switch is grounded, the other end is connected to the _P1 port of the microcontroller, and a pull-up resistor is installed on the reset switch _P1 port line. The other end of the pull-up resistor is connected to a 5V power supply; there are input/output (I/O) interfaces P ₁ to P ₅ on the microcontroller, P ₁ is connected to the resistance end of the reset switch, and P ₂ to P ₅ are respectively connected to The chip select end CS, clock interface SK, write end DI, and output end DO of the memory memory are connected; the electronic zero adjustment circuit is controlled according to the designed electronic zero adjustment control program to achieve the function of clearing. This method is quick and convenient to adjust. 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. An electronic zero-adjustment method of a photoelectric shaft angle encoder is realized by an electronic zero-adjustment circuit, and is characterized in that it also includes a designed execution zero-adjustment control program to control the electronic zero-adjustment circuit, and the electronic zero-adjustment circuit includes a memory Memory (8), reset switch (9), pull-up resistor (10), single-chip microcomputer (11); on the memory memory (8), there are chip select end CS, clock interface SK, write end DI, output end DO , the chip select terminal CS is only effective when the low level is "0", and the memory storage (8) starts to work; the clock interface SK, when the single-chip microcomputer (11) performs read and write operations, sends a clock signal to the memory storage (8); write Input terminal DI, single-chip microcomputer (11) when writing operation, towards memory storage (8) serial shift input data; Output terminal DO, single-chip microcomputer (11) when carrying out reading operation to memory storage (8), by memory storage ( 8) Output data to the single-chip microcomputer (11), one end of the reset switch (9) is grounded, and the other end is connected to the _P1 port of the single-chip microcomputer (11). (8) is stored in the initial data, the reset switch (9) is low level "0" when it is turned on, the current data value of the photoelectric shaft angle encoder is stored in the memory storage (8), and the memory For the initial data refresh in the memory (8), a pull-up resistor (10) is installed on the _P1 port line of the reset switch (9), and the other end of the pull-up resistor (10) is connected to a 5V power supply. There are input and output (I/O) interfaces, namely P ₁ port, P ₂ port, P ₃ port, P ₄ port, P ₅ port, P ₁ port is connected to the power terminal of the reset switch (9), and P ₂ port is connected to the memory The chip select port CS of the memory (8) is connected, the P ₃ port is connected with the clock interface SK of the memory memory (8), the P ₄ port is connected with the write-in port DI of the memory memory (8), and the P ₅ port is connected with the memory memory (8). The output terminal DO of memory (8) is connected; The execution electronic zero-adjustment control program of design, controls electronic zero-adjustment circuit, at first by the P ₂ port of single-chip microcomputer (11) after the program starts by chip select terminal CS, starts memory storage ( 8), P ₃ mouth provides clock signal by the clock interface SK of memory memory (8), and this moment, single-chip microcomputer (11) reads once in the memory memory (8) by the output terminal DO serial shift of memory memory (8). Angle deviation value, set it as H and store it in the address of the EPROM program memory of the single-chip microcomputer (11), then read the current self angle value of the photoelectric shaft angle encoder, set it as K, then judge the state of the _P1 port , when P ₁ port is high level "1", it means that it does not need to be cleared, and the original angle deviation value H is still used to obtain the corresponding mechanical zero angle value; when P ₁ port is low level "0" , it means that it needs to be cleared, the single-chip microcomputer 11 enters the subroutine of the write operation, starts the memory storage (8) through the chip select terminal CS, and provides the clock signal for the memory storage (8) by the _P3 port through the clock interface SK, and the single-chip microcomputer Port ₄ of (11) writes the current self-angle value K of the photoelectric shaft angle encoder into the memory storage (8) through the write terminal DI in a serial shift mode, as the new angle deviation value H, and then returns to The main program uses the current self-angle value K of the photoelectric shaft encoder to subtract the angle deviation value H, because at this time K=H, the corresponding angle value of the mechanical zero position is obtained, and KH=0 achieves the function of clearing .