CN211726609U

CN211726609U - Encoder tester

Info

Publication number: CN211726609U
Application number: CN201922220243.7U
Authority: CN
Inventors: 褚永钊; 刘斌
Original assignee: Dongguan Taotao Electronic Co ltd
Current assignee: Dongguan Taotao Electronic Co ltd
Priority date: 2019-12-12
Filing date: 2019-12-12
Publication date: 2020-10-23
Anticipated expiration: 2029-12-12

Abstract

The utility model discloses an encoder tester, including the tester organism, the tester organism opens by main control MCU, button matrix, outside and stops signal input interface, step motor controller, step motor, filtering and clamp protection circuit, LCD display screen, test result output interface, test result and status indicator lamp, buzz ware and power and constitute, installation power, main control MCU and step motor in the tester organism, the side installation LCD display screen of tester organism. The utility model relates to an encoder tester, encoder manufacture factory can be according to the nimble test parameter condition that sets up of the specification of its encoder of producing, the encoder quality of its production of quick, accurate test to automatic sorting out the defective products, thereby improve production efficiency.

Description

Encoder tester

Technical Field

The utility model relates to an encoder tester technical field specifically is an encoder tester.

Background

Rotary encoders have been widely used in various electronic products such as home appliances, instruments, industrial controls, etc., and are very important as input devices for users to operate machines, and if the encoders are abnormal, the machines cannot operate normally or even are out of control. And some product output signals can cause unqualified quality due to poor quality or deformation of the elastic sheet, non-centered rotating shaft, poor printing of the conducting layer and other reasons in the production process of the encoder, the defective products can be sorted out, the yield of the encoder product leaving a factory can be improved, and the reliability of the product using the rotary encoder is also improved.

The prior art is provided. The existing encoder test method mainly uses an oscilloscope for observation test and a special tester for test.

The method of using oscilloscope is to observe the waveform of encoder displayed by oscilloscope by human eye. The method mainly depends on manual observation of a tester, records a section of encoder output signals rotating at a constant speed through an oscilloscope, and then develops and observes the phase relationship among all phase pulses. The test speed is slow, the efficiency is low, the resolution ratio of the oscilloscope is limited, the repeated reliability is poor, and the report is easy to miss because of incomplete observation range.

The existing tester mainly tests the logical relation of signals, has low signal acquisition resolution, cannot display waveforms to analyze specific signal error types, can only set the error range of the test but cannot flexibly set the test, and cannot provide a control interface used by external control equipment such as a PLC (programmable logic controller).

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide an encoder tester, encoder manufacture factory can be according to the nimble test parameter condition that sets up of the specification of its encoder of producing, the encoder quality of its production of quick, accurate test to automatic sorting out the defective products, thereby improve production efficiency, solved the problem among the prior art.

In order to achieve the above object, the utility model provides a following technical scheme: the utility model provides an encoder tester, includes the tester organism, the tester organism is opened by main control MCU, button matrix, outside and stops signal input interface, step motor controller, step motor, filtering and clamp protection circuit, LCD display screen, test result output interface, test result and status indicator lamp, buzz ware and power and constitute, installation power, main control MCU and step motor in the tester organism, the LCD display screen is installed to the side of tester organism, and the side of LCD display screen sets up the button matrix, and the last encoder that is surveyed of connecting of step motor.

Preferably, the power supply supplies power for the main control MCU, the key matrix, the external start-stop signal input interface, the stepping motor controller, the stepping motor, the filtering and clamping protection circuit, the LCD display screen, the test result output interface, the test result and state indicator lamp and the buzzer.

Preferably, the LCD display screen and the key matrix modify the corresponding test parameters of the encoder to be tested, and the modifiable parameters include the rotating speed of the stepping motor, the single-turn signal number value of the encoder, the minimum width of T1, the minimum width of T2, the maximum Noise width, and the maximum Pulse width.

Preferably, the LCD display screen can display the oscillogram of the encoder to be tested, the single-turn signal number value and the upper and lower limits of the T1-T4 measured value in real time, and can display the oscillogram and the measured value of the specific unqualified signal of the unqualified encoder.

Preferably, the tester body is connected with a start-stop signal of the external control system through an interface, and can output a test result and a state signal to the external control system.

Compared with the prior art, the beneficial effects of the utility model are as follows:

the utility model relates to an encoder tester, main control MCU handles and judges the encoder signal of buffer memory to the threshold value pair corresponding time span of judging the condition according to setting up the parameter, find out there is Noise overrun, Pulse Noise overrun, the phase place chronogenesis mistake, single circle signal quantity is unmatched, lack certain looks signal or do not have the encoder of signal completely to judge for unqualifiedly, judge and light NG pilot lamp among testing result and the test result and the status indicator lamp and export NG signal for PLC with the action of control execution letter sorting nonconforming product and start the test flow of next encoder after being surveyed the encoder is unqualified. If the encoder to be tested has been tested and has been accomplished after appointed number of turns in the setting parameter, main control MCU signals and stops driving step motor for step motor controller, light the OK pilot lamp among testing result and the status indicator lamp and output the OK signal and give PLC in order to start the test procedure of next encoder, encoder manufacture factory can set up the test parameter condition according to the specification flexibility of its encoder of producing, its encoder quality of producing of quick, accurate test, and automatic sorting out the defective products, thereby improve production efficiency.

Drawings

Fig. 1 is a schematic view of the overall structure of the present invention;

FIG. 2 is a side view of the overall structure of the present invention;

FIG. 3 is a schematic view of the internal structure of the tester body of the present invention;

fig. 4 is a block diagram of the present invention.

In the figure: 1. a tester body; 2. a main control MCU; 3. a key matrix; 4. an external start-stop signal input interface; 5. a stepper motor controller; 6. a stepping motor; 7. a filter and clamp protection circuit; 8. An LCD display screen; 9. a test result output interface; 10. test result and status indicator lights; 11. a humming device; 12. a power source; 13. and (6) a tested encoder.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

Referring to fig. 1-4, an encoder tester comprises a tester body 1, wherein the tester body 1 is composed of a main control MCU2, a key matrix 3, an external start/stop signal input interface 4, a stepping motor controller 5, a stepping motor 6, a filter and clamp protection circuit 7, an LCD display screen 8, a test result output interface 9, a test result and status indicator lamp 10, a buzzer 11 and a power supply 12, the tester body 1 is internally provided with the power supply 12, the main control MCU2 and the stepping motor 6, the tester body 1 is provided with the LCD display screen 8 at the side, the LCD display screen 8 is provided with the key matrix 3 at the side, the stepping motor 6 is connected with a tested encoder 13, and the power supply 12 is a main control MCU2, the key matrix 3, the external start/stop signal input interface 4, the stepping motor controller 5, the stepping motor 6, the clamp filter and protection circuit 7, the LCD display screen 8, The test result output interface 9, the test result and state indicator light 10 and the buzzer 11 supply power, the LCD display screen 8 and the key matrix 3 modify the corresponding test parameters of the tested encoder 13, the modifiable parameters comprise the rotating speed of the stepping motor 6, the single-turn signal number value of the encoder, the minimum width of T1, the minimum width of T2, the maximum Noise width and the maximum Pulse width, the LCD display screen 8 can display the oscillogram of the tested encoder 13, the single-turn signal number value and the upper and lower limits of the measured values of T1-T4 in real time, the oscillogram and the measured values of specific unqualified signals of unqualified encoders can be displayed, the tester body 1 is connected with start and stop signals of an external control system through an interface, the test result and state signals can be output to the external control system, the LCD display screen 8, the key matrix 3 and the test result and state indicator light 10 form a user interface, the MCU2 controls the stepping motor 6 to drive the tested encoder 13 to rotate at a constant speed and sample the output signals of the encoder Analyzing and processing, the testing result prompts the operator through the LCD display screen 8, the testing result and status indicator lamp 10 and the buzzer 11, and outputs the testing result signal for the external system such as PLC through the signal output interface, the power supply 12 provides the working power supply for each part of the system, the main control MCU2 controls the LCD display screen 8 to display the main interface, the main control MCU2 scans the input signal of the key matrix 3 to obtain the control and parameter information input by the user according to the operation menu, and simultaneously monitors the external start-stop signal input interface 4 to respond to the start-stop signal sent by the external PLC, when the main control MCU2 catches the signal of the start test sent by the external PLC, or catches the control signal of the start test input by the key matrix 3 by the user, the test flow of an encoder is started, the main control MCU2 outputs a signal to the stepper motor controller 5 to drive the stepper motor 6 to rotate clockwise or counterclockwise, the stepping motor 6 drives the current encoder 13 to be tested to rotate at a constant speed, the output signal of the encoder 13 to be tested is filtered by the encoder signal interface filtering and clamping protection circuit 7 to filter out high-frequency noise signals and induction strong interference signals, then the main control MCU2 collects the signals at a sampling frequency far higher than the frequency of the output signal of the encoder and caches the signals in a memory RAM of the memory, the main control MCU2 processes and judges the encoder signals buffered in the corresponding time range according to the threshold value of the set parameter to the judgment condition, finds out the encoder which has Noise overrun, Pulse Noise overrun, phase time sequence error, single circle signal quantity mismatching, lacks a certain phase signal or has no signal at all, judges that the encoder is unqualified, lights the NG indicator lamp in the detection result and the test result and the status indicator lamp 10 after judging that the tested encoder 13 is unqualified, and outputs the NG signal to the PLC to control and execute the action of sorting unqualified products and start the test flow of the next encoder. If the encoder 13 to be tested has been tested and has been accomplished the appointed number of turns in the setting parameter after, main control MCU2 signals and stops driving step motor 6 for step motor controller 5, light the OK pilot lamp among testing result and status indicator lamp 10 and output the OK signal and give PLC in order to start the test procedure of next encoder, encoder manufacture factory can be according to the nimble test parameter condition that sets up of the specification of its encoder of producing, the encoder quality of its production of quick, accurate test, and automatic sorting out the defective products, thereby improve production efficiency.

In summary, the following steps: the utility model discloses encoder tester, main control MCU2 handles and judges the encoder signal of buffer memory to the threshold value pair corresponding time within range according to the setting parameter, find out there is Noise overrun, Pulse Noise overrun, the phase place chronogenesis mistake, single circle signal quantity does not match, lack certain looks signal or do not have the encoder of signal completely and judge for unqualifiedly, judge and light the NG pilot lamp in testing result and the status indicator lamp 10 after being surveyed 13 is unqualified and export the NG signal and give PLC with the action of control execution letter sorting nonconforming product and start the test flow of next encoder. If the encoder 13 to be tested has been tested and has been accomplished the appointed number of turns in the setting parameter after, main control MCU2 signals and stops driving step motor 6 for step motor controller 5, light the OK pilot lamp among testing result and status indicator lamp 10 and output the OK signal and give PLC in order to start the test procedure of next encoder, encoder manufacture factory can be according to the nimble test parameter condition that sets up of the specification of its encoder of producing, the encoder quality of its production of quick, accurate test, and automatic sorting out the defective products, thereby improve production efficiency.

It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.

Claims

1. The utility model provides an encoder tester, includes tester organism (1), its characterized in that: tester organism (1) is by main control MCU (2), button matrix (3), outside start-stop signal input interface (4), step motor controller (5), step motor (6), filtering and clamp protection circuit (7), LCD display screen (8), test result output interface (9), test result and status indicator lamp (10), buzz ware (11) and power (12) are constituteed, install power (12), main control MCU (2) and step motor (6) in tester organism (1), side installation LCD display screen (8) of tester organism (1), the side of LCD display screen (8) sets up button matrix (3), connects on step motor (6) and is surveyed encoder (13).

2. An encoder tester as claimed in claim 1, wherein: the power supply (12) supplies power for the main control MCU (2), the key matrix (3), the external start-stop signal input interface (4), the stepping motor controller (5), the stepping motor (6), the filtering and clamping protection circuit (7), the LCD display screen (8), the test result output interface (9), the test result and state indicator lamp (10) and the buzzer (11).

3. An encoder tester as claimed in claim 1, wherein: the LCD display screen (8) and the key matrix (3) modify corresponding test parameters of the tested encoder (13), and the modifiable parameters comprise the rotating speed of the stepping motor (6), the single-turn signal number value of the encoder, the minimum width of T1, the minimum width of T2, the maximum Noise width and the maximum Pulse width.

4. An encoder tester as claimed in claim 1, wherein: the LCD display screen (8) can display the oscillogram of the encoder (13) to be tested, the single-turn signal number value and the upper and lower limits of the T1-T4 measurement value in real time, and can display the oscillogram and the measurement value of the specific unqualified signal of the unqualified encoder.

5. An encoder tester as claimed in claim 1, wherein: the tester body (1) is connected with a start-stop signal of an external control system through an interface, and can output a test result and a state signal to the external control system.