CN107877355B - High-reliability grinding machine shutdown control device and method thereof - Google Patents
High-reliability grinding machine shutdown control device and method thereof Download PDFInfo
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- CN107877355B CN107877355B CN201711377317.7A CN201711377317A CN107877355B CN 107877355 B CN107877355 B CN 107877355B CN 201711377317 A CN201711377317 A CN 201711377317A CN 107877355 B CN107877355 B CN 107877355B
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- 238000000034 method Methods 0.000 title claims abstract description 41
- 238000005259 measurement Methods 0.000 claims abstract description 35
- 239000010453 quartz Substances 0.000 claims abstract description 12
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N silicon dioxide Inorganic materials O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims abstract description 12
- 238000001514 detection method Methods 0.000 claims description 43
- 230000008569 process Effects 0.000 claims description 31
- 238000012360 testing method Methods 0.000 claims description 24
- 230000002159 abnormal effect Effects 0.000 claims description 20
- 230000005856 abnormality Effects 0.000 claims description 15
- 230000008878 coupling Effects 0.000 claims description 12
- 238000010168 coupling process Methods 0.000 claims description 12
- 238000005859 coupling reaction Methods 0.000 claims description 12
- 230000003287 optical effect Effects 0.000 claims description 12
- 230000006641 stabilisation Effects 0.000 claims description 6
- 238000011105 stabilization Methods 0.000 claims description 6
- 238000004891 communication Methods 0.000 claims description 3
- 230000003111 delayed effect Effects 0.000 claims description 3
- 238000004519 manufacturing process Methods 0.000 abstract description 4
- 235000012431 wafers Nutrition 0.000 description 18
- 239000007787 solid Substances 0.000 description 11
- 238000010586 diagram Methods 0.000 description 6
- 238000012544 monitoring process Methods 0.000 description 4
- 230000009471 action Effects 0.000 description 3
- 230000006978 adaptation Effects 0.000 description 2
- 230000008859 change Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 1
- 239000000919 ceramic Substances 0.000 description 1
- 239000013078 crystal Substances 0.000 description 1
- 238000005520 cutting process Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000003754 machining Methods 0.000 description 1
- 238000012797 qualification Methods 0.000 description 1
- 238000011897 real-time detection Methods 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B24—GRINDING; POLISHING
- B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
- B24B37/00—Lapping machines or devices; Accessories
- B24B37/005—Control means for lapping machines or devices
- B24B37/013—Devices or means for detecting lapping completion
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B24—GRINDING; POLISHING
- B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
- B24B37/00—Lapping machines or devices; Accessories
- B24B37/005—Control means for lapping machines or devices
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B24—GRINDING; POLISHING
- B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
- B24B49/00—Measuring or gauging equipment for controlling the feed movement of the grinding tool or work; Arrangements of indicating or measuring equipment, e.g. for indicating the start of the grinding operation
- B24B49/10—Measuring or gauging equipment for controlling the feed movement of the grinding tool or work; Arrangements of indicating or measuring equipment, e.g. for indicating the start of the grinding operation involving electrical means
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
- Y02P70/10—Greenhouse gas [GHG] capture, material saving, heat recovery or other energy efficient measures, e.g. motor control, characterised by manufacturing processes, e.g. for rolling metal or metal working
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Constituent Portions Of Griding Lathes, Driving, Sensing And Control (AREA)
- Finish Polishing, Edge Sharpening, And Grinding By Specific Grinding Devices (AREA)
Abstract
The invention discloses a high-reliability grinding machine shutdown control device, which comprises a frequency measurement system grinding machine control circuit module, a connecting port, two grinding machine shutdown controllers connected in series and a grinding machine, wherein the grinding machine shutdown controllers are connected in series; the frequency measurement system control circuit module is connected with the two serially connected grinder shutdown controllers through a connecting port, and the grinder is electrically connected with the two serially connected grinder shutdown controllers; the grinding machine shutdown controller is a solid-state relay or a photoelectric coupler; the frequency measurement system control circuit module comprises a grinder control output self-checking module, a grinder control self-checking module and a grinder stopping control module; the invention provides a control device and a control method thereof, which are high in reliability, simple and reasonable in structure, convenient to manufacture, based on double-path control and with a self-checking function, and suitable for a quartz wafer grinding on-line frequency measurement system to stop a grinding machine.
Description
Technical Field
The present invention relates to the field of control devices, and more particularly, to a highly reliable mill shut-down control device and method thereof.
Background
Frequency grinding of quartz wafers is an important process in quartz crystal oscillator production, and wafers are cut and thinned by a grinder. Currently, commercial on-line frequency measurement systems (such as an ALC on-line frequency monitor of tranat company in the united states) on the market monitor the thickness of a wafer in real time by dynamically measuring the resonant frequency of the wafer, and when the thickness of the wafer reaches a preset value, the on-line frequency measurement system transmits a shutdown signal to stop the grinder.
At present, an online frequency measurement system in a factory controls the shutdown of a grinder through a photoelectric coupler or a solid-state relay, and when the photoelectric coupler or the solid-state relay fails in the process of grinding quartz wafers, the current frequency measurement system cannot detect that devices fail, so that the over-frequency accident of the whole wafer is most likely to be caused; meanwhile, when the grinder stops the control line to be disconnected or the contact is poor, the current frequency measurement system can not detect the problem that the control line is disconnected or the contact is poor, and the problem is also very likely to cause the over-frequency accident of the whole wafer.
The same risk hidden danger exists for other grinder measurement and control systems such as magnetic steel sheets, ceramic sheets, sapphires and the like which relate to thickness cutting. With the continuous improvement of the requirements of the current precision machining field on production efficiency, qualification rate and automation degree, a high-reliability grinding machine shutdown control device and a method thereof are urgently needed.
Disclosure of Invention
The invention overcomes the defects of the prior art, and provides the control device and the method thereof which have the advantages of high reliability, simple and reasonable structure, convenient manufacture, double-path control and self-checking function and are suitable for the on-line frequency measurement system shutdown grinding machine of quartz wafer grinding.
In order to solve the technical problems, the technical scheme of the invention is as follows:
a high-reliability grinding machine shutdown control device comprises a frequency measurement system grinding machine control circuit module, a connecting port, two grinding machine shutdown controllers connected in series and a grinding machine; the frequency measurement system control circuit module is connected with the two serially connected grinder shutdown controllers through a connecting port, and the grinder is electrically connected with the two serially connected grinder shutdown controllers; the grinding machine shutdown controller is a solid-state relay or a photoelectric coupler; the frequency measurement system control circuit module comprises a grinder control output self-checking module, a grinder control self-checking module and a grinder stopping control module; the control communication is that the control module of the shutdown grinding machine outputs a low level at an IO port after conducting work, so that an optocoupler controlled by the IO port is conducted, a B pole of the triode generates a low voltage value, and the triode is conducted, so that the input level of the IO port of the control self-checking module of the grinding machine is changed from a high level to a low level, and the condition of a control circuit is judged; the automatic detection device comprises a grinder control output self-detection module, a grinder control self-detection module, a first current limiting resistor and a second current limiting resistor, wherein the serial identification lamp and the first current limiting resistor are arranged between the grinder control output self-detection module and the grinder control self-detection module, and the identification lamp is an LED lamp and an external indicator lamp which are connected in parallel and is used for displaying the state of a circuit.
Furthermore, the connection port adopts DB9, namely a serial port pin.
Further, the serial grinder shutdown controller is connected with pins 1 and 9 of the connecting port and is used as an output port; and the other serial grinder shutdown controller is connected with pins 2 and 8 of the connecting port and is used as an output port.
Further, the grinder control output self-checking module and the shutdown grinder control module are provided with pull-down resistors for clamping uncertain signals at low level and keeping balance of driving capability and power consumption.
Further, the pull-down resistor is 10K ohms.
Further, the output current of the self-checking control device is controlled to be 10-12 mA.
A method for a high-reliability grinding machine shutdown control device comprises a startup self-checking detection step, a grinding working step, a grinding machine control loop function detection step and an online frequency measurement step;
the specific steps of the starting-up self-checking detection step are as follows:
101 The grinding machine controls the self-checking output port 1 to output low level, the relay of the self-checking output circuit module 1 is conducted, the grinding machine controls the self-checking output port 2 to output low level, and the relay of the self-checking output circuit module 2 is conducted;
102 The grinder stop control port 1 outputs a high level, the grinder stop control circuit module 1 is not in optical coupling conduction, the grinder stop control port 2 outputs a high level, and the grinder stop control circuit module 2 is not in optical coupling conduction;
103 A) delay of 100ms, waiting for signal stabilization;
104 Reading the level 1 of the control self-checking input port of the grinder, which is marked as Flag11, and reading the level 2 of the control self-checking input port of the grinder, which is marked as Flag12;
105 A delay of 100ms for signal interference cancellation;
106 Reading the level 1 of the self-checking input port of the grinder again, which is marked as Flag21, and reading the level 2 of the self-checking input port of the grinder again, which is marked as Flag22;
107 Judging whether Flag11 is equal to Flag21 and the value is true; determining whether Flag12 is equal to Flag22 and the value is true;
108 If the conditions of step 107) are met and the values are all true, the mill control port 1 outputs a low level and the mill control port 2 outputs a low level. And judging whether the Flag11 is equal to the Flag21 and is not true, failing the self-check, and damaging the control circuit module 1 of the touch screen grinder. If the Flag12 is equal to the Flag22 and is not true, the self-check fails, and the touch screen prompts the grinder control circuit module 2 to be damaged.
109 On the premise that the values of the conditions in the step 107) are all true, delaying for 100ms, and waiting for the signal to be stable;
110 Reading the mill control self-test input port 1 level after step 109), noted Flag31; reading the 1 level of a control self-checking input port of the grinder, and recording as Flag32;
111 A delay of 100ms after step 110) for signal interference cancellation;
112 Reading the level 1 of the control self-checking input port of the grinder again and recording as Flag41; the level 2 of the control self-checking input port of the grinder is read again and is marked as Flag42;
113 Judging whether Flag31 is equal to Flag41 and whether the value is true; determining if Flag32 is equal to Flag42 and if the value is true;
114 If the condition in the step 113) is satisfied, the self-checking is successful, and the control module of the frequency measuring instrument grinder can work normally; otherwise, the self-checking fails, whether the Flag31 is equal to the Flag41 or not is judged, and the touch screen prompts the grinder control module 1 to be damaged; if only Flag32 is equal to Flag42 and not true, the touch screen prompts the grinder control module 2 to be damaged;
the main interface 'grinding' button of the frequency measuring instrument is pressed, and the detection steps of the control loop function of the grinder are the same before grinding is started and when the quartz wafer grinding reaches the target frequency and stops, and the specific steps are as follows:
201 A grinder stop control port 1 outputs a high level, and the grinder stop control module 1 is not in optical coupling conduction; the grinder stop control port 2 outputs a high level, and the grinder stop control module 2 is not in optical coupling conduction;
202 A) delay of 100ms, waiting for signal stabilization;
203 Reading the 1 level of a control self-checking input port of the grinder, and recording as Flag11; reading the level 2 of a control self-checking input port of the grinder, and recording as Flag12;
204 A delay of 100ms for signal interference cancellation;
205 Reading the 1 level of the control self-checking input port of the grinder again and recording as Flag21; the level 2 of the control self-checking input port of the grinder is read again and is marked as Flag22;
206 Judging whether Flag11 is equal to Flag21 and the value is true; determining whether Flag12 is equal to Flag22 and the value is true;
207 If the conditions of step 206) are met, outputting a low level by the control port 1 of the grinder; the grinder control port 2 outputs a low level; if judging whether the Flag11 is equal to the Flag21 or not, if yes, the grinder control loop 1 is abnormal, and the touch screen prompts abnormality; if only Flag12 is equal to Flag22 and is not true, the control loop 2 of the grinder is abnormal, and the touch screen prompts abnormality;
208 If the conditions in step 206) are met, the conditions are true, the time is delayed for 100ms, and the waiting signal is stable;
209 After step 208), reading the mill control self-test input port 1 level, noted Flag31; reading the level 2 of a control self-checking input port of the grinder, and recording as Flag32;
210 After step 209), a delay of 100ms for signal interference cancellation;
211 After step 210), the mill control self-test input port 1 level is read again, denoted as Flag41, and the mill control self-test input port 2 level is read again, denoted as Flag42;
212 Judging whether Flag31 is equal to Flag41 and whether the value is true; determining if Flag32 is equal to Flag42 and if the value is true;
213 If the conditions of step 212) are met, the control loop of the grinding machine is normal; if judging whether the Flag31 is equal to the Flag41 or not, if yes, the grinder control loop 1 is abnormal, and the touch screen prompts abnormality; if only Flag32 is equal to Flag42 and is not true, the control loop 2 of the grinder is abnormal, and the touch screen prompts abnormality;
the on-line frequency measurement step comprises the following specific steps:
301 Judging whether the grinding process is performed by a grinding machine control line;
302 If the condition in step 301) is satisfied, no control line detection is performed in the current online frequency measurement process; if the condition in step 301) is not satisfied, performing step 303) with the position of the detection mark of the control line of the grinder in the grinding process being 1;
303 Judging whether the current quartz wafer frequency exceeds 60% of the grinding frequency and does not reach the target frequency;
304 If the condition in step 303) is satisfied, reading the level 1 of the self-checking input port controlled by the grinder, namely Flag1, and reading the level 2 of the self-checking input port controlled by the grinder, namely Flag2; if the condition in step 303) is not satisfied, no control line detection is performed in the current online frequency measurement process;
305 If Flag1 is 1, the running state of the system is set to be abnormal in the control loop 1 of the grinder, if Flag2 is 1, the running state of the system is set to be abnormal in the control loop 2 of the grinder, a buzzer of a frequency measuring instrument alarms, a touch screen prompts abnormality, and a control port of the grinder sends out a stop pulse signal; if both Flag1 and Flag2 are 0, the detection flow is ended and the grinder control loop is normal.
Compared with the prior art, the invention has the advantages that: during the grinding process, the grinding machine stops grinding and is automatically shut down as long as one of the following conditions occurs: the frequency measuring instrument has the advantages that the components of the internal grinding machine control module are damaged, the grinding machine control connecting lines are not connected, the external grinding machine control module is damaged, or the interface module is damaged in the grinding process, or the controlled module falls off.
The invention controls two photoelectric couplers and two solid state relays in series, thus reducing the probability of no shutdown to be extremely low. Two serially connected optocouplers are respectively controlled on a machine controlled by the photoelectric coupler, and two serially connected solid state relays are respectively controlled on a machine controlled by the solid state relay.
The invention can effectively prevent the over-frequency problem caused by the problems of damage of the internal module, external wiring and external control element of the frequency measuring instrument in the grinding process by the system start-up self-test, the grinding machine control circuit detection when the grinding is started, the grinding machine control circuit detection in the grinding process and the grinding machine control circuit detection when the grinding is carried out to the target frequency. The method can effectively prevent overfrequency accidents caused by the problems of damage of an internal module of an online frequency measurement system, faults of a grinder control system or external wiring and the like in the grinding process.
Drawings
FIG. 1 is a schematic diagram of a series solid state relay of a control device of the present invention;
FIG. 2 is a schematic diagram of a serial photocoupler structure of the control device of the present invention;
FIG. 3 is a schematic diagram of the internal structure of a solid state relay of the control device of the present invention;
FIG. 4 is a schematic diagram of the internal structure of a series photoelectric coupler of the control device of the present invention;
FIG. 5 is a schematic diagram of a control circuit of the control device of the present invention;
FIG. 6 is a schematic diagram of a legacy circuit configuration of the control device of the present invention;
FIG. 7 is a flow chart of the start-up self-test of the grinder control module of the control device according to the present invention;
FIG. 8 is a self-test flow chart of the control loop of the grinding machine of the control device of the present invention;
fig. 9 is a flow chart of the detection of the control loop of the grinder in the on-line frequency measurement process of the control device of the present invention.
Detailed Description
The invention is further described below with reference to the drawings and the detailed description.
As shown in fig. 1 to 4, a highly reliable mill shutdown control device comprises a frequency measurement system mill control circuit module, a connection port, two series-connected mill shutdown controllers and a mill. The control circuit module of the frequency measurement system grinder is connected with two grinder shutdown controllers connected in series through a connecting port. When the photoelectric coupler or the solid relay fails in the process of grinding the quartz wafer, double guarantee can be realized, and the possibility of over-frequency accidents of the whole wafer is reduced; meanwhile, when the closing control line of the grinder is not connected or the contact is poor, the position can be timely detected, and the occurrence of the over-frequency accident of the whole wafer is effectively avoided. The connection port adopts a DB9 interface. The serial grinding machine shutdown controller is connected with pins 1 and 9 of the connecting port and is used as an output port; and the other serial grinder shutdown controller is connected with pins 2 and 8 of the connecting port and is used as an output port. The grinder is electrically connected with two grinder shutdown controllers connected in series. The grinder shutdown controller is a solid state relay or a photoelectric coupler. The grinder control circuit module of the frequency measurement system comprises a grinder control output self-checking module, a grinder control self-checking module and a grinder stopping control module; the control communication is that the control module stops outputting low level at the IO port after conducting work, so that the optocoupler controlled by the IO port is conducted, the B pole of the triode generates a low-voltage electric value, and the triode is conducted, so that the input level of the IO port of the control self-checking module of the grinder is converted from high level to low level, and the condition of the control circuit is judged. The automatic detection device is characterized in that an identification lamp and a first current limiting resistor which are connected in series are arranged between the grinding machine control output self-detection module and the grinding machine control self-detection module, and the first current limiting resistor is 600-720 ohms. The grinding machine control output self-checking module and the shutdown grinding machine control module are provided with pull-down resistors for clamping uncertain signals at low level and keeping balance of driving capability and power consumption. The pull-down resistor is 10K ohms. The identification lamp is an LED lamp and an external indicator lamp which are connected in parallel and used for displaying the condition of the circuit. The output current of the whole self-checking device is controlled to be 10-12 mA.
In a self-checking embodiment of a control circuit module of a start-up grinder of a specific frequency measurement system, as shown in fig. 5, an IO port of an MCU (micro control unit) of the grinder control output self-checking module is connected with the left side of R24, UOUT2 is a driving port DB9 externally connected with the outside, pin 1 of UOUT2 is an action output +1, and pin 9 is an action output-1. P6 and LED D10 form parallelly connected, are external pilot lamp for show the situation of frequency measurement system self-checking, and whether internal circuit normally works. The output of U8 connects R28 pull-up resistor to the IO port of MCU port of the grinder control self-checking module, and the connection on the left of R37 is the IO port of MCU of the grinder control module. The whole control circuit mainly controls three loads by controlling the on-off of the Q9 triode: UOUT2, D10 (parallel P6), U8, to start the hardware self-test function.
When the whole instrument is powered on, the MCU of each module starts to work, the self-test starts to start, the grinder controls the IO port of the MCU of the output self-test module to output low level, the left side of the U6 optocoupler is conducted, then the right side of the optocoupler is conducted, 12.4V is connected to the B pole of the Q6 triode through R22, at the moment, the Q6 triode is conducted, the coil of the relay JDQ3 is electrified, then the normally open contact of the relay is attracted, and 12.4V is connected to the node of the action output-1.
Then the output low level of the IO port of the MCU of the grinder control module is stopped, the left side of the U10 optocoupler is conducted, the right side of the optocoupler is conducted, 12.4V is connected to the B pole of the Q9 triode through R35, the Q9 triode is conducted, then three loads are conducted, the left side Bian Xiandao of the U8 optocoupler is conducted, and then the right side of the optocoupler is conducted. The right 3.3V of the optocoupler is connected to ground through an R28 resistor. At this time, the input level of the IO port of the MCU port of the grinding machine control self-checking module is changed from a high level to a low level when the original U2 optocoupler is not conducted. Such a state judgment control circuit is normal. Otherwise, an alarm is sent, the circuit has a problem, the IO port of the MCU of the grinding machine control output self-checking module is restored to a high level, and the IO port of the MCU of the grinding machine control module is turned off to restore to a high level.
The right and left parts of the circuit are as same as each other in function, and the embodiment mainly uses 1 and 9 of DB9 as one output port and uses 2 and 8 as the other output port to respectively control two serially connected back-end loads, so that the probability of non-stop is reduced to be extremely low. Wherein R26, R39 is a 10K pull-down resistor, R31 is a 680 current limiting resistor, and R20 is a 10 current limiting resistor. The output current of the circuit was 11.2mA.
The self-checking embodiment of the control loop of the grinder of the frequency measuring system normally starts the instrument, arranges the wafer, puts down the upper grinding disc, prepares for grinding, stops the output low level of the IO port of the MCU of the control module of the grinder, turns on the left side of the U10 optocoupler, turns on the right side of the optocoupler, connects 12.4V to the B pole of the Q9 triode through R35, and turns on the Q9 triode.
If the port of DB9 is normally connected to DB9 of an external grinder and the chip inside the grinder is operating normally, after Q9 is turned on, the load controlled by Q9 will be turned on. The left side of the U8 optocoupler is conducted, so that the right side of the U8 optocoupler is also conducted, and the grinder controls the input level of the IO port of the MCU port of the self-checking module to change from a high level to a low level when the original U8 optocoupler is not conducted; thus, the connection is normal, the components are normal, and grinding can be started.
If DB9 is not connected, the input level of the IO port of the MCU port of the grinding machine control self-checking module in the flow does not change from high level to low level, so that the touch screen prompts 'abnormal connection of control port'.
If DB9 is connected, the input level of the IO port of the MCU port of the mill control self-test module in the above-described flow is not changed from high level to low level, it is possible that the chips inside the mill may be damaged or the control circuit inside the mill may be damaged, and the mill may not be started.
When the machine starts to grind normally, a hardware self-test is started in the grinding process, and whether a grinding machine control loop is normal is mainly detected, and the circuit is normal if the level of a grinding machine control self-test input port 1 and the level of a grinding machine control self-test input port 2 are read. If any one of the read level values is 1, which represents that one of the circuits is bad, the grinding will be stopped, and a warning is indicated on the touch screen.
When there is no problem in the grinding process, but the grinder shutdown controller (solid state relay or photocoupler) is damaged during the grinding process, and pins to which the grinder shutdown controller and the grinder are connected are broken and shorted, if only one solid state relay or one photocoupler is on the grinder table, the grinder is not controlled by the shutdown of the monitoring instrument and can be always in a normal grinding state, and the wafer must be overtime even if the instrument alarms over the grinding frequency, and when an operator presses an emergency pause button of the grinder again when finding out.
In another case, pins of a shutdown controller and a monitoring instrument of the grinding machine are broken down, and the switching control of the grinding machine is not controlled by the instrument, so that effective protection of the machine is difficult.
However, in this embodiment, two mill shut-down controllers are used, and in the event that one of the mill shut-down controllers and the pins to which the mill is connected are broken down and shorted, one of the two is uncontrolled, but the other is in series with the mill on/off module, as would normally stop the mill.
The other condition is that the pins of the grinder on-off module and the monitoring instrument are broken down, one damaged path is uncontrollable, but the other path ensures the normal shutdown of the grinder, and plays a good protection role.
The emergency also includes the grinding mill shutdown controller and the broken pins of the mill connection, which open the circuit so that the mill will shut down directly. Or the grinding machine shutdown controller and the monitoring instrument pins are damaged to be broken, so that the single control module cannot control the grinding machine to stop normally, but the grinding machine can stop normally.
Therefore, under the condition that the grinding machine shutdown controller (the solid state relay and the photoelectric coupler) is damaged, the scheme of the invention can greatly improve the probability of normal shutdown of the grinding machine and greatly reduce the over-frequency accidents caused by the damage of the grinding machine shutdown controller (the solid state relay and the photoelectric coupler).
As shown in fig. 6, the previously designed instrument circuit can normally output the driving load and also can detect the quality of the circuit itself, but cannot judge whether the external load is normal or not and cannot detect whether the external load falls off or not. As shown in fig. 3, UOUT1 is a driving port DB9 externally connected to the outside, pin 1 of UOUT1 is positive in output, and pin 9 is negative in output. P4 is parallelly connected with the LED, is external pilot lamp. The output of U2 connects R4 pull-up resistor to the IO port of MCU port of control self-checking module, and the IO port of MCU of stopping control module is connected to the left of R14. The MCU of each module starts self-checking work, the IO port of the MCU of the control module is stopped to output low level, the left side of the U4 optocoupler is conducted, the right side of the optocoupler is conducted, the 12.4V is connected to the B pole of the Q3 triode through R12, the Q3 triode is conducted, the left side of the U2 optocoupler is conducted, then the right side of the optocoupler is conducted, the right 3.3V of the optocoupler is grounded through R4 resistor, the input level of the IO port of the MCU port of the self-checking module is controlled to be changed from high level to low level when the original U2 optocoupler is not conducted, the state judges that the whole control circuit is normal, otherwise, the alarm circuit has problems, the IO port of the MCU of the self-checking module is controlled to recover high level, and the IO port of the MCU of the control module is stopped to recover high level.
The whole instrument is started, the grinder control circuit module has a self-checking function, the whole instrument is started and operated, the detection before the grinding button is pressed is included in the running process of the whole instrument, the detection in the grinding process and the detection when the grinding is carried out to the target frequency are carried out, the running condition of the instrument is known in real time through the four steps of detection, and the frequency measuring system is ensured not to exceed the frequency in the grinding process. As shown in fig. 7, during the start-up self-test, the self-test flow of the grinder control circuit module specifically includes the following steps:
101 The grinding machine controls the self-checking output port 1 to output low level, the relay of the self-checking output circuit module 1 is conducted, the grinding machine controls the self-checking output port 2 to output low level, and the relay of the self-checking output circuit module 2 is conducted;
102 The grinder stop control port 1 outputs a high level, the grinder stop control circuit module 1 is not in optical coupling conduction, the grinder stop control port 2 outputs a high level, and the grinder stop control circuit module 2 is not in optical coupling conduction;
103 A) delay of 100ms, waiting for signal stabilization;
104 Reading the level 1 of the control self-checking input port of the grinder, which is marked as Flag11, and reading the level 2 of the control self-checking input port of the grinder, which is marked as Flag12;
105 A delay of 100ms for signal interference cancellation;
106 Reading the level 1 of the self-checking input port of the grinder again, which is marked as Flag21, and reading the level 2 of the self-checking input port of the grinder again, which is marked as Flag22;
107 Judging whether Flag11 is equal to Flag21 and the value is true; determining whether Flag12 is equal to Flag22 and the value is true;
108 If the conditions of step 107) are met and the values are all true, the mill control port 1 outputs a low level and the mill control port 2 outputs a low level. And judging whether the Flag11 is equal to the Flag21 and is not true, failing the self-check, and damaging the control circuit module 1 of the touch screen grinder. If the Flag12 is equal to the Flag22 and is not true, the self-check fails, and the touch screen prompts the grinder control circuit module 2 to be damaged.
109 On the premise that the values of the conditions in the step 107) are all true, delaying for 100ms, and waiting for the signal to be stable;
110 Reading the mill control self-test input port 1 level after step 109), noted Flag31; reading the 1 level of a control self-checking input port of the grinder, and recording as Flag32;
111 A delay of 100ms after step 110) for signal interference cancellation;
112 Reading the level 1 of the control self-checking input port of the grinder again and recording as Flag41; the level 2 of the control self-checking input port of the grinder is read again and is marked as Flag42;
113 Judging whether Flag31 is equal to Flag41 and whether the value is true; determining if Flag32 is equal to Flag42 and if the value is true;
114 If the condition in the step 113) is satisfied, the self-checking is successful, and the control module of the frequency measuring instrument grinder can work normally; otherwise, the self-checking fails, whether the Flag31 is equal to the Flag41 or not is judged, and the touch screen prompts the grinder control module 1 to be damaged; if only Flag32 is equal to Flag42 and not true, the touch screen prompts the grinder control module 2 to be damaged.
As shown in fig. 8, when the "grinding" button of the main interface of the frequency measuring instrument is pressed, the detection steps of the function of the control loop of the grinder are the same as those before starting grinding and when the grinding of the quartz wafer reaches the target frequency and stops, and the specific steps are as follows:
201 A grinder stop control port 1 outputs a high level, and the grinder stop control module 1 is not in optical coupling conduction; the grinder stop control port 2 outputs a high level, and the grinder stop control module 2 is not in optical coupling conduction;
202 A) delay of 100ms, waiting for signal stabilization;
203 Reading the 1 level of a control self-checking input port of the grinder, and recording as Flag11; reading the level 2 of a control self-checking input port of the grinder, and recording as Flag12;
204 A delay of 100ms for signal interference cancellation;
205 Reading the 1 level of the control self-checking input port of the grinder again and recording as Flag21; the level 2 of the control self-checking input port of the grinder is read again and is marked as Flag22;
206 Judging whether Flag11 is equal to Flag21 and the value is true; determining whether Flag12 is equal to Flag22 and the value is true;
207 If the conditions of step 206) are met, outputting a low level by the control port 1 of the grinder; the grinder control port 2 outputs a low level; if judging whether the Flag11 is equal to the Flag21 or not, if yes, the grinder control loop 1 is abnormal, and the touch screen prompts abnormality; if only Flag12 is equal to Flag22 and is not true, the control loop 2 of the grinder is abnormal, and the touch screen prompts abnormality;
208 If the conditions in step 206) are met, the conditions are true, the time is delayed for 100ms, and the waiting signal is stable;
209 After step 208), reading the mill control self-test input port 1 level, noted Flag31; reading the level 2 of a control self-checking input port of the grinder, and recording as Flag32;
210 After step 209), a delay of 100ms for signal interference cancellation;
211 After step 210), the mill control self-test input port 1 level is read again, denoted as Flag41, and the mill control self-test input port 2 level is read again, denoted as Flag42;
212 Judging whether Flag31 is equal to Flag41 and whether the value is true; determining if Flag32 is equal to Flag42 and if the value is true;
213 If the conditions of step 212) are met, the control loop of the grinding machine is normal; if judging whether the Flag31 is equal to the Flag41 or not, if yes, the grinder control loop 1 is abnormal, and the touch screen prompts abnormality; if only Flag32 is equal to Flag42 and is not true, the control loop 2 of the grinder is abnormal, and the touch screen prompts abnormality;
the control loop of the grinding machine is detected, the frequency measuring instrument detects the control loop of the grinding machine, if the control line is not connected or the control module of the grinding machine is abnormal, the frequency measuring instrument gives out a warning prompt, and if the control line is connected normally, the on-line frequency measuring process is carried out.
As shown in fig. 9, the detection of the control loop of the grinding machine in the online frequency measurement process can detect whether the control loop of the grinding machine is normal or not, and the real-time detection in the grinding process can prevent the over-frequency problem caused by the failure of the control loop or the control line of the grinding machine in the grinding process, which comprises the following specific steps:
301 Judging whether the grinding process is performed by a grinding machine control line;
302 If the condition in step 301) is satisfied, no control line detection is performed in the current online frequency measurement process; if the condition in step 301) is not satisfied, performing step 303) with the position of the detection mark of the control line of the grinder in the grinding process being 1;
303 Judging whether the current quartz wafer frequency exceeds 60% of the grinding frequency and does not reach the target frequency;
304 If the condition in step 303) is satisfied, reading the level 1 of the self-checking input port controlled by the grinder, namely Flag1, and reading the level 2 of the self-checking input port controlled by the grinder, namely Flag2; if the condition in step 303) is not satisfied, no control line detection is performed in the current online frequency measurement process;
305 If Flag1 is 1, the running state of the system is set to be abnormal in the control loop 1 of the grinder, if Flag2 is 1, the running state of the system is set to be abnormal in the control loop 2 of the grinder, a buzzer of a frequency measuring instrument alarms, a touch screen prompts abnormality, and a control port of the grinder sends out a stop pulse signal; if both Flag1 and Flag2 are 0, the detection flow is ended and the grinder control loop is normal.
The foregoing is merely a preferred embodiment of the present invention, and it should be noted that modifications and adaptations to those skilled in the art may be made without departing from the concept of the present invention, and such modifications and adaptations are intended to be comprehended within the scope of the present invention.
Claims (1)
1. The method of the high-reliability grinding machine shutdown control device is characterized by comprising a frequency measurement system grinding machine control circuit module, a connecting port, two grinding machine shutdown controllers connected in series and a grinding machine; the frequency measurement system control circuit module is connected with the two serially connected grinder shutdown controllers through a connecting port, and the grinder is electrically connected with the two serially connected grinder shutdown controllers; the grinding machine shutdown controller is a solid-state relay or a photoelectric coupler; the frequency measurement system control circuit module comprises a grinder control output self-checking module, a grinder control self-checking module and a grinder stopping control module; the control communication is that the control module of the shutdown grinding machine outputs a low level at an IO port after conducting work, so that an optocoupler controlled by the IO port is conducted, a B pole of the triode generates a low voltage value, and the triode is conducted, so that the input level of the IO port of the control self-checking module of the grinding machine is changed from a high level to a low level, and the condition of a control circuit is judged; the automatic detection device comprises a grinder control output self-detection module, a grinder control self-detection module, a first current limiting resistor, a second current limiting resistor and a third current limiting resistor, wherein the serial identification lamp and the first current limiting resistor are arranged between the grinder control output self-detection module and the grinder control self-detection module, and the identification lamp is an LED lamp and an external indicator lamp which are connected in parallel and used for displaying the condition of a circuit;
the connection port adopts DB9, namely a serial port pin;
the serial grinding machine shutdown controller is connected with pins 1 and 9 of the connecting port and is used as an output port; the other serial grinder shutdown controller is connected with pins 2 and 8 of the connecting port and is used as an output port;
the grinding machine control output self-checking module and the shutdown grinding machine control module are provided with pull-down resistors, which are used for clamping uncertain signals at low level and keeping balance of driving capability and power consumption;
the pull-down resistor adopts 10K ohms;
the specific use method comprises a start-up self-checking detection step, a grinding working step, a detection step of a grinder control loop function and an online frequency measurement step;
the specific steps of the starting-up self-checking detection step are as follows:
101 The grinding machine controls the self-checking output port 1 to output low level, the relay of the self-checking output circuit module 1 is conducted, the grinding machine controls the self-checking output port 2 to output low level, and the relay of the self-checking output circuit module 2 is conducted;
102 The grinder stop control port 1 outputs a high level, the grinder stop control circuit module 1 is not in optical coupling conduction, the grinder stop control port 2 outputs a high level, and the grinder stop control circuit module 2 is not in optical coupling conduction;
103 A) delay of 100ms, waiting for signal stabilization;
104 Reading the level 1 of the control self-checking input port of the grinder, which is marked as Flag11, and reading the level 2 of the control self-checking input port of the grinder, which is marked as Flag12;
105 A delay of 100ms for signal interference cancellation;
106 Reading the level 1 of the self-checking input port of the grinder again, which is marked as Flag21, and reading the level 2 of the self-checking input port of the grinder again, which is marked as Flag22;
107 Judging whether Flag11 is equal to Flag21 and the value is true; determining whether Flag12 is equal to Flag22 and the value is true;
108 If the conditions of step 107) are met and the values are all true, the grinder control port 1 outputs a low level, and the grinder control port 2 outputs a low level;
judging whether the Flag11 is equal to the Flag21 and is not true, failing the self-check, and damaging the control circuit module 1 of the touch screen grinder;
judging whether the Flag12 is equal to the Flag22 or not, if not, failing the self-check, and prompting the damage of the grinder control circuit module 2 by the touch screen;
109 On the premise that the values of the conditions in the step 107) are all true, delaying for 100ms, and waiting for the signal to be stable;
110 Reading the mill control self-test input port 1 level after step 109), noted Flag31; reading the 1 level of a control self-checking input port of the grinder, and recording as Flag32;
111 A delay of 100ms after step 110) for signal interference cancellation;
112 Reading the level 1 of the control self-checking input port of the grinder again and recording as Flag41; the level 2 of the control self-checking input port of the grinder is read again and is marked as Flag42;
113 Judging whether Flag31 is equal to Flag41 and whether the value is true; determining if Flag32 is equal to Flag42 and if the value is true;
114 If the condition in the step 113) is satisfied, the self-checking is successful, and the control module of the frequency measuring instrument grinder can work normally; otherwise, the self-checking fails, whether the Flag31 is equal to the Flag41 or not is judged, and the touch screen prompts the grinder control module 1 to be damaged; if only Flag32 is equal to Flag42 and not true, the touch screen prompts the grinder control module 2 to be damaged;
the main interface 'grinding' button of the frequency measuring instrument is pressed, and the detection steps of the control loop function of the grinder are the same before grinding is started and when the quartz wafer grinding reaches the target frequency and stops, and the specific steps are as follows:
201 A grinder stop control port 1 outputs a high level, and the grinder stop control module 1 is not in optical coupling conduction; the grinder stop control port 2 outputs a high level, and the grinder stop control module 2 is not in optical coupling conduction;
202 A) delay of 100ms, waiting for signal stabilization;
203 Reading the 1 level of a control self-checking input port of the grinder, and recording as Flag11; reading the level 2 of a control self-checking input port of the grinder, and recording as Flag12;
204 A delay of 100ms for signal interference cancellation;
205 Reading the 1 level of the control self-checking input port of the grinder again and recording as Flag21; the level 2 of the control self-checking input port of the grinder is read again and is marked as Flag22;
206 Judging whether Flag11 is equal to Flag21 and the value is true; determining whether Flag12 is equal to Flag22 and the value is true;
207 If the conditions of step 206) are satisfied, the grinder control port 1 outputs a low level; the grinder control port 2 outputs a low level; if judging whether the Flag11 is equal to the Flag21 or not, if yes, the grinder control loop 1 is abnormal, and the touch screen prompts abnormality; if only Flag12 is equal to Flag22 and is not true, the control loop 2 of the grinder is abnormal, and the touch screen prompts abnormality;
208 If the conditions in step 206) are met, the conditions are true, the time is delayed for 100ms, and the waiting signal is stable;
209 After step 208), reading the mill control self-test input port 1 level, noted Flag31; reading the level 2 of a control self-checking input port of the grinder, and recording as Flag32;
210 After step 209), a delay of 100ms for signal interference cancellation;
211 After step 210), the mill control self-test input port 1 level is read again, denoted as Flag41, and the mill control self-test input port 2 level is read again, denoted as Flag42;
212 Judging whether Flag31 is equal to Flag41 and whether the value is true; determining if Flag32 is equal to Flag42 and if the value is true;
213 If the conditions of step 212) are met, the control loop of the grinding machine is normal; if judging whether the Flag31 is equal to the Flag41 or not, if yes, the grinder control loop 1 is abnormal, and the touch screen prompts abnormality; if only Flag32 is equal to Flag42 and is not true, the control loop 2 of the grinder is abnormal, and the touch screen prompts abnormality;
the on-line frequency measurement step comprises the following specific steps:
301 Judging whether the grinding process is performed by a grinding machine control line;
302 If the condition in step 301) is satisfied, no control line detection is performed in the current online frequency measurement process; if the condition in step 301) is not satisfied, performing step 303) with the position of the detection mark of the control line of the grinder in the grinding process being 1;
303 Judging whether the current quartz wafer frequency exceeds 60% of the grinding frequency and does not reach the target frequency;
304 If the condition in step 303) is satisfied, reading the level 1 of the self-checking input port controlled by the grinder, namely Flag1, and reading the level 2 of the self-checking input port controlled by the grinder, namely Flag2; if the condition in step 303) is not satisfied, no control line detection is performed in the current online frequency measurement process;
305 If Flag1 is 1, the running state of the system is set to be abnormal in the control loop 1 of the grinder, if Flag2 is 1, the running state of the system is set to be abnormal in the control loop 2 of the grinder, a buzzer of a frequency measuring instrument alarms, a touch screen prompts abnormality, and a control port of the grinder sends out a stop pulse signal; if both Flag1 and Flag2 are 0, the detection flow is ended and the grinder control loop is normal.
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| CN202310856212.9A CN116852253A (en) | 2017-12-19 | 2017-12-19 | High-reliability grinding machine shutdown control device |
| CN201711377317.7A CN107877355B (en) | 2017-12-19 | 2017-12-19 | High-reliability grinding machine shutdown control device and method thereof |
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| CN201711377317.7A CN107877355B (en) | 2017-12-19 | 2017-12-19 | High-reliability grinding machine shutdown control device and method thereof |
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| CN107877355A (en) | 2018-04-06 |
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