CN202916649U - Circuit for directly converting broken state signal of grinding wheel into digital value - Google Patents
Circuit for directly converting broken state signal of grinding wheel into digital value Download PDFInfo
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- CN202916649U CN202916649U CN 201220579617 CN201220579617U CN202916649U CN 202916649 U CN202916649 U CN 202916649U CN 201220579617 CN201220579617 CN 201220579617 CN 201220579617 U CN201220579617 U CN 201220579617U CN 202916649 U CN202916649 U CN 202916649U
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- emery wheel
- broken state
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Abstract
A circuit for directly converting a broken state signal of a grinding wheel into a digital value is mainly composed of a CMOS integrated circuit, a bias circuit and a signal clamp circuit. Compared with the prior art, the logic function of the CMOS integrated circuit CC4070 is used to detect the changes in output level to judge whether the grinding wheel is broken or not, the broken state signal of the grinding wheel is directly converted into the digital value to be processed by an intelligent controller. The design of a signal processing circuit is simplified, the signal processes such as amplification, rectification, and filtering are avoided, the timeliness for recognizing the broken state of the grinding wheel is improved, and simultaneously the cost of the signal processing circuit is reduced.
Description
Technical field
The utility model belongs to emery wheel revolving strength detection technique field, relates in particular to the intelligent control system of revolving strength testing machine.
Background technology
Revolving strength is the most important technical parameters of various emery wheels, it is related to the security that emery wheel uses, enforceable test method standard has all been formulated in the detection of emery wheel revolving strength both at home and abroad, the check of emery wheel revolving strength is carried out at the Special rotating strength-testing machine.When fragmentation occurs in the checkout procedure of regulation emery wheel, need identify the broken state of emery wheel immediately.Emery wheel broken state recognition technology is one of core technology of revolving strength testing machine.Its importance is mainly reflected in 2 points: the concrete state when 1. detecting the emery wheel fragmentation, the rotating speed during such as fragmentation or holding time under the check rotating speed; 2. axis system is protected.By taking brake measure, emergency brake to reduce the destruction that the emery wheel fragmentation produces main shaft to the turn-around machine main shaft, thereby reach the purpose of protection axis system.
At present, the emery wheel broken state recognition technology that domestic rotation test machine adopts has two kinds, and the first is acceleration method, and another kind is photoelectric method.Because photoelectric method has certain requirement to the reflective of abrasive wheel end face, scope of application relative narrower, thereby the employing of most revolving strength testing machine is first method---acceleration method.Acceleration method emery wheel broken state recognition technology is the instantaneous variation of revolving strength testing machine protection cavity vibrational state when utilizing acceleration transducer to detect the emery wheel fragmentation, when the transient changing of certain amplitude appears in the vibrational state of protection cavity, judge that then fragmentation has appearred in emery wheel.
Acceleration method emery wheel broken state recognition system comprises acceleration transducer and signal processing circuit two parts, the effect of sensor is that the vibration signal with revolving strength testing machine protection cavity is converted to voltage signal, and the effect of signal processing circuit is that this signal is converted to and can and outputs to control module or performer for the signal of carrying out.
As shown in Figure 2: the acceleration method emery wheel broken state recognition system signal processing circuit that generally adopts at present is comprised of clamping circuit, amplifying circuit, rectification circuit, comparator circuit, comparative voltage circuit for generating etc.Signal V by sensor output
1Being converted to can be for the signal V that carries out
2The time, passed through multiple-stage treatment, formed a mistiming Δ t, wherein rectification and filtering part are the major influence factors of mistiming Δ t.The size of Δ t has determined the ageing of emery wheel broken state identification, and Δ t is less, and the ageing better of emery wheel broken state identification is described.The acceleration method emery wheel broken state recognition system signal processing circuit that generally adopts at present is because the link of processing procedure is more, the particularly impact of rectification and filtering part, it is not fine to the ageing of broken state identification, can not satisfy in high speed, the hypervelocity emery wheel checkout procedure the ageing requirement of emery wheel broken state identification.
At present Grinding Technology and emery wheel manufacturing technology towards at a high speed, the hypervelocity future development, to ageing the having higher requirement that intellectuality and the emery wheel broken state of revolving strength testing machine control mode are identified, need to design a kind of better signal processing circuit ageing, that emery wheel broken state signal directly can be converted to digital quantity that has.
The utility model content
Technical problem to be solved in the utility model is by a kind of acceleration method emery wheel broken state recognition system signal processing circuit of simplification is provided, emery wheel broken state signal directly is converted to can be for the digital quantity of the Based Intelligent Control devices such as PLC processing, simplify the link that signal is processed, improve the ageing of emery wheel broken state identification, to satisfy in high speed, the hypervelocity emery wheel checkout procedure the ageing requirement of emery wheel broken state identification.
Provide following technical scheme in order to address the above problem: a kind of circuit that emery wheel broken state signal directly is converted to digital quantity mainly is comprised of CMOS integrated circuit and biasing circuit and signal clamping circuit.
The input end II of CMOS integrated circuit is connected with power supply by dropping resistor, and the input end I of CMOS integrated circuit is connected with power supply by bleeder circuit; Between the input end I of CMOS integrated circuit and ground, be provided with clamp diode; The output terminal of CMOS integrated circuit CC4070 is connected with the processor of control module.
Described bleeder circuit is composed in series by divider resistance and potentiometer.
Described CMOS integrated circuit is CMOS integrated circuit CC4070.
The processor of described control module is microcontroller system or other CMOS class chip, and the output terminal of CC4070 directly is connected with it.
The processor of described control module is PLC, and the output terminal of CC4070 is connected with it by corresponding interface circuit.
CMOS integrated circuit CC4070 includes 4 independently 2 input end XOR gate, and the threshold value of XOR gate is half of bias voltage difference.When the signal of two input ends is unequal, be output as logical one; When the signal of two input ends equates, be output as logical zero.Utilize this function of CC4070, one input end is set to high level, and the other end is set to be slightly less than the low level of threshold value, and is carried on the acceleration transducer, and this moment, CC4070 was output as high level.In the process of revolving strength testing machine running, the vibration of its protection cavity is converted to voltage signal V by acceleration transducer
1, when fragmentation occured emery wheel, the protection cavity of the fragment impact rotating strength-testing machine of emery wheel produced additional vibration, makes V
1Produce the peak value of transient state, thereby make the level generation of the CC4070 other end greater than the transient pulse of threshold value, the output of CC4070 will be reversed this moment, and output becomes low level.Therefore, just can judge by the variation that detects the CC4070 output level whether emery wheel fragmentation has occured.
The utility model compared with prior art, utilize the logic function of CMOS integrated circuit CC4070, judge by the variation that detects its output level whether emery wheel fragmentation has occured, emery wheel broken state signal directly is converted to can be for the digital quantity of intelligent controller spare processing.Simplify the design of signal processing circuit, avoided the signal processings such as amplification, rectification, filtering, made ageing being improved of emery wheel broken state identification, reduced simultaneously the cost of signal processing circuit.
Description of drawings
Fig. 1 is electrical schematic diagram of the present utility model.
Fig. 2 is the principle schematic of prior art.
Embodiment
As shown in Figure 1, a kind of circuit that emery wheel broken state signal directly is converted to digital quantity mainly is comprised of CMOS integrated circuit CC4070 and biasing circuit and signal clamping circuit.
The input end II of CMOS integrated circuit CC4070 is connected with power supply by dropping resistor R2, and the input end I of CMOS integrated circuit CC4070 is connected with power supply by bleeder circuit; Bleeder circuit is composed in series by divider resistance R1 and potentiometer W1.Be provided with clamp diode D2 between the input end I of CMOS integrated circuit CC4070 and ground, clamp diode is signal clamping circuit, and acceleration transducer D1 is in parallel with clamp diode D2.The output terminal III of CMOS integrated circuit CC4070 is connected with the processor of control module.
Principle of work: the supply voltage of CMOS integrated circuit CC4070 adopts one direction+15V, and its threshold value is 7.5V.Divider resistance R1 and potentiometer W1 form bleeder circuit, can change the voltage V of CMOS integrated circuit CC4070 input end I by regulator potentiometer W1
A1, V
A1Be adjusted to than the little 200mV of threshold voltage, can obtain good effect.The voltage V of CC4070 input end II
B1Load by resistance R 2, be about 13V.Clamp diode D2 plays clamping action, in order to protect CMOS integrated circuit CC4070 and acceleration transducer D1.The output terminal III of CMOS integrated circuit, its voltage are V
S1, V
S1With V
A1And V
B1Formation XOR relation.When the processor of control module is microcontroller system or other CMOS class chip, V
S1Directly output gets final product; When the processing apparatus of control module is PLC or other device, V
S1Can be by corresponding interface circuit output.
When rotation test machine runs well, V
A1Be low level, V
B1Be high level, V
S1Be high level.When the emery wheel generation was broken, the protection cavity of the fragment impact rotating strength-testing machine of emery wheel produced additional vibration, and acceleration transducer D1 output transient pulse also is superimposed upon on the CMOS integrated circuit CC4070 input end 1, at this moment voltage V
A1Threshold value greater than CMOS integrated circuit CC4070 becomes high level.According to logical relation, V
S1Produce upset, become low level by high level.When the output of CMOS integrated circuit CC4070 is converted to low level by high level, judge that emery wheel occurs broken.
Claims (6)
1. circuit that emery wheel broken state signal directly is converted to digital quantity is characterized in that: mainly be comprised of CMOS integrated circuit and biasing circuit and signal clamping circuit.
2. the circuit that emery wheel broken state signal directly is converted to digital quantity according to claim 1, it is characterized in that: the input end II of CMOS integrated circuit is connected with power supply by dropping resistor, and the input end I of CMOS integrated circuit is connected with power supply by bleeder circuit; Between the input end I of CMOS integrated circuit and ground, be provided with clamp diode; The output terminal of CMOS integrated circuit CC4070 is connected with the processor of control module.
3. the circuit that emery wheel broken state signal directly is converted to digital quantity according to claim 2, it is characterized in that: described bleeder circuit is composed in series by divider resistance and potentiometer.
4. the circuit that emery wheel broken state signal directly is converted to digital quantity according to claim 1 and 2, it is characterized in that: described CMOS integrated circuit is CMOS integrated circuit CC4070.
5. the circuit that emery wheel broken state signal directly is converted to digital quantity according to claim 2, it is characterized in that: the processor of described control module is microcontroller system or other CMOS class chip, and the output terminal of CC4070 directly is connected with it.
6. the circuit that emery wheel broken state signal directly is converted to digital quantity according to claim 2, it is characterized in that: the processor of described control module is PLC, and the output terminal of CC4070 is connected with it by corresponding interface circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220579617 CN202916649U (en) | 2012-11-06 | 2012-11-06 | Circuit for directly converting broken state signal of grinding wheel into digital value |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220579617 CN202916649U (en) | 2012-11-06 | 2012-11-06 | Circuit for directly converting broken state signal of grinding wheel into digital value |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202916649U true CN202916649U (en) | 2013-05-01 |
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ID=48164947
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220579617 Expired - Lifetime CN202916649U (en) | 2012-11-06 | 2012-11-06 | Circuit for directly converting broken state signal of grinding wheel into digital value |
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| Country | Link |
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| CN (1) | CN202916649U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103302593A (en) * | 2013-05-30 | 2013-09-18 | 盐城市欧华机械制造有限公司 | Anti-explosion grinding machine and anti-explosion method thereof |
-
2012
- 2012-11-06 CN CN 201220579617 patent/CN202916649U/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103302593A (en) * | 2013-05-30 | 2013-09-18 | 盐城市欧华机械制造有限公司 | Anti-explosion grinding machine and anti-explosion method thereof |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| ASS | Succession or assignment of patent right |
Owner name: ZHENGZHOU RESEARCH INSTITUTE FOR ABRASIVES + GRIND Free format text: FORMER OWNER: ZHENGZHOU ABRASIVE MATERIALS, ABRASIVE TOOLS, GRINDING INST. (CN) NO.1 HUASHAN R Effective date: 20140212 |
|
| TR01 | Transfer of patent right |
Effective date of registration: 20140212 Address after: 450001 Zhengzhou high tech Zone, Henan, China Street, No. 121 Patentee after: ZHENGZHOU RESEARCH INSTITUTE FOR ABRASIVES & GRINDING Co.,Ltd. Patentee after: ZHENGZHOU SANMO SUPERHARD MATERIAL Co.,Ltd. Address before: 450001 Zhengzhou high tech Zone, Henan, China Street, No. 121 Patentee before: ZHENGZHOU Research Institute FOR ABRASIVES & GRINDING Patentee before: ZHENGZHOU SANMO SUPERHARD MATERIAL Co.,Ltd. |
|
| TR01 | Transfer of patent right | ||
| CX01 | Expiry of patent term |
Granted publication date: 20130501 |
|
| CX01 | Expiry of patent term |