CN110806724B - Remote monitoring device of numerical control machine tool - Google Patents
Remote monitoring device of numerical control machine tool Download PDFInfo
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- CN110806724B CN110806724B CN201911272867.1A CN201911272867A CN110806724B CN 110806724 B CN110806724 B CN 110806724B CN 201911272867 A CN201911272867 A CN 201911272867A CN 110806724 B CN110806724 B CN 110806724B
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- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
- G05B19/00—Programme-control systems
- G05B19/02—Programme-control systems electric
- G05B19/18—Numerical control [NC], i.e. automatically operating machines, in particular machine tools, e.g. in a manufacturing environment, so as to execute positioning, movement or co-ordinated operations by means of programme data in numerical form
- G05B19/406—Numerical control [NC], i.e. automatically operating machines, in particular machine tools, e.g. in a manufacturing environment, so as to execute positioning, movement or co-ordinated operations by means of programme data in numerical form characterised by monitoring or safety
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- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03H—IMPEDANCE NETWORKS, e.g. RESONANT CIRCUITS; RESONATORS
- H03H11/00—Networks using active elements
- H03H11/02—Multiple-port networks
- H03H11/04—Frequency selective two-port networks
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- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
- G05B2219/00—Program-control systems
- G05B2219/30—Nc systems
- G05B2219/31—From computer integrated manufacturing till monitoring
- G05B2219/31105—Remote control of network controller
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Abstract
The invention discloses a remote monitoring device of a numerical control machine, which comprises a waveform detection module, a conditioning noise reduction module and a filtering emission module, wherein the waveform detection module collects the signal waveform of a signal emission end in the working process of the remote monitoring device of the numerical control machine by using a wave detector J1 with the model number of AD 8313, the conditioning noise reduction module uses a conditioning circuit consisting of an operational amplifier AR1, an operational amplifier AR2, a capacitor C2 and a capacitor C3 to increase the open loop gain of a signal and stabilize the static working point of the signal, a triode Q1 is used for detecting the potential difference of output signals of the operational amplifier AR3 and the operational amplifier AR6, the output signals of the operational amplifier AR4 and the operational amplifier AR6 are finally input into a noise reduction circuit consisting of the operational amplifier AR5 and the triode Q2, the filtering emission module uses a filter circuit consisting of an inductor L1, a capacitor C4 and a capacitor C5 to filter the signal and sends the filtered signal, the remote monitoring carrier signal of the numerical control machine tool can be monitored and converted into a reference signal of a remote monitoring terminal.
Description
Technical Field
The invention relates to the technical field of signal transmission, in particular to a remote monitoring device for a numerical control machine tool.
Background
At present, along with the continuous development of intelligent technology, the application method of electrical equipment has been changed greatly, and the digit control machine tool is the equipment that the mill is commonly used, and along with the improvement of technique, the digit control machine tool can remote monitoring and operation, however, be carrier transmission in the remote monitoring signal transmission of digit control machine tool, when instantaneous signal was too big, produced repetitive response in the signal, will cause the control receiving end card screen, can only close restart system, seriously influences digit control machine tool remote monitoring device's result of use.
Disclosure of Invention
In view of the above situation, an object of the present invention is to provide a remote monitoring device for a numerical control machine tool, which can monitor a remote monitoring carrier signal of the numerical control machine tool and convert the remote monitoring carrier signal into a reference signal of a remote monitoring terminal.
The technical scheme includes that the remote monitoring device of the numerical control machine tool comprises a waveform detection module, a conditioning noise reduction module and a filtering emission module, wherein the waveform detection module collects signal waveforms of a signal emission end in the remote monitoring device of the numerical control machine tool during working by using a wave detector J1 with the model number of AD 8313, the conditioning noise reduction module uses an operational amplifier AR1, an operational amplifier AR2, a capacitor C2 and a capacitor C3 to form a conditioning circuit to increase signal open-loop gain and stabilize a signal static working point, simultaneously uses a diode D5 and a diode D6 to limit the amplitude of signals, then inputs the signals into an inverse input end of an operational amplifier AR6 after buffering the signals by using an operational amplifier AR3, the operational amplifier AR6 compares output signals of the operational amplifier AR2 and the operational amplifier AR3, and uses a triode Q1 to detect signal potential differences output by the operational amplifier AR 38 and the operational amplifier AR6, and finally the operational amplifier AR4 compares the potential of a triode Q1 emission electrode and the output, signals output by the operational amplifier AR4 and the operational amplifier AR6 are finally input into a noise reduction circuit consisting of the operational amplifier AR5 and the triode Q2 to reduce noise of the signals, and the filtering and transmitting module forms a filtering circuit by using an inductor L1, a capacitor C4 and a capacitor C5 to filter the signals and transmits the signals to the remote monitoring terminal of the numerical control machine through a signal transmitter E1.
Due to the adoption of the technical scheme, compared with the prior art, the invention has the following advantages;
1. an operation amplifier AR1, an operation amplifier AR2, a capacitor C2 and a capacitor C3 are used to form a conditioning circuit to increase the open-loop gain of a signal, and at the same time, a static working point of the signal is stabilized, a resistor R5 and a resistor R6 are used to divide voltage to provide bias voltage for the operation amplifier AR1, the size of a resistor R4 can be properly adjusted according to the capacity of a capacitor C2, that is, the size of the open-loop gain of the operation amplifier AR1 is adjusted, the effect of AC bypass of the in-phase input end of the operation amplifier AR2 is realized by using the capacitor C3 and the resistor R6, the output signal ripple of the operation amplifier AR2 is reduced, and meanwhile, a diode D5 and a diode D6 are used to limit the signal amplitude to play a voltage dividing effect, and then the signal is input into the anti-phase input;
2. the operational amplifier AR4 compares the emitter potential of the triode Q1 with the output signal of the operational amplifier AR2, the operational amplifier AR4 and the operational amplifier AR6 compare the signals twice to ensure the accuracy of the signals, the operational amplifier AR4 and the output signal of the operational amplifier AR6 are finally input into a noise reduction circuit formed by the operational amplifier AR5 and the triode Q2 to reduce the noise of the signals and adjust the noise of the signals, further ensure the stability of the signals, a filter circuit formed by an inductor L1, a capacitor C4 and a capacitor C5 is used for filtering the signals, the signals are sent into a numerical control machine remote monitoring terminal through a signal transmitter E1, when the instantaneous signal at the signal transmitting end is too large, the waveform is abnormal, namely, the wave form signal is converted into a voltage signal abnormal by the wave form detector J1, the numerical control machine remote monitoring terminal receives the reference electric signal, the signal receiving value is automatically adjusted.
Drawings
Fig. 1 is a block diagram of waveform detection of a remote monitoring device of a numerically controlled machine tool according to the present invention.
Fig. 2 is a module diagram of conditioning and noise reduction of the remote monitoring device of the numerical control machine tool.
Fig. 3 is a block diagram of filtering emission of the remote monitoring device of the numerically controlled machine tool according to the present invention.
Detailed Description
The foregoing and other aspects, features and advantages of the invention will be apparent from the following more particular description of embodiments of the invention, as illustrated in the accompanying drawings in which reference is made to figures 1 to 3. The structural contents mentioned in the following embodiments are all referred to the attached drawings of the specification.
In the first embodiment, the remote monitoring device of the numerical control machine tool comprises a waveform detection module, a conditioning noise reduction module and a filtering emission module, wherein the waveform detection module collects the signal waveform of a signal emission end when the remote monitoring device of the numerical control machine tool works by using a wave detector J1 with the model number of AD 8313, a wave detector J1 converts a signal waveform signal into a voltage signal to be output, the conditioning noise reduction module uses an operational amplifier AR1, an operational amplifier AR2, a capacitor C2 and a capacitor C3 to form a conditioning circuit to increase the open-loop gain of a signal and stabilize the static working point of the signal, simultaneously uses a diode D5 and a diode D6 to limit the signal, then inputs the signal into the inverting input end of an operational amplifier AR6 after buffering the signal by using an operational amplifier AR3, the operational amplifier AR6 compares the output signals of the operational amplifier AR2 and the operational amplifier AR3, and uses a triode Q1 to detect the potential difference of the output signals of the operational amplifier AR3 and the operational amplifier AR6, finally, the operational amplifier, signals output by the operational amplifier AR4 and the operational amplifier AR6 are finally input into a noise reduction circuit consisting of the operational amplifier AR5 and the triode Q2 to reduce noise of the signals, and the filtering and transmitting module filters the signals by using a filtering circuit consisting of an inductor L1, a capacitor C4 and a capacitor C5 and transmits the signals to a remote monitoring terminal of the numerical control machine through a signal transmitter E1;
the conditioning noise reduction module uses an operational amplifier AR1, an operational amplifier AR2, a capacitor C2 and a capacitor C3 to form a conditioning circuit to increase the open-loop gain of a signal and stabilize the static working point of the signal, uses a resistor R5 and a resistor R6 to divide voltage to provide bias voltage for the operational amplifier AR1, can properly adjust the size of a resistor R4 according to the capacity of the capacitor C2, namely adjust the size of the open-loop gain of the operational amplifier AR1, uses the capacitor C3 and the resistor R6 to realize the effect of alternating current bypass of the non-inverting input end of the operational amplifier AR2, reduces the ripple of the output signal of the operational amplifier AR2, uses a diode D5 and a diode D6 to limit the signal to perform the voltage division effect, then inputs the signal into the inverting input end of the operational amplifier AR6 after the signal is buffered by the operational amplifier AR3 to ensure the synchronism of the signal, the operational amplifier AR6 compares the output signals of the operational amplifier AR2 and the operational amplifier AR3, and uses a triode Q1 to detect, the signals output by the operational amplifier AR6 are prevented from being abnormal, so that the signals are inaccurate, the operational amplifier AR4 compares the potential of the emitter of the triode Q1 with the signals output by the operational amplifier AR2, the operational amplifier AR4 and the operational amplifier AR6 compare the signals twice, so that the accuracy of the signals is ensured, the signals output by the operational amplifier AR4 and the operational amplifier AR6 are finally input into a noise reduction circuit consisting of the operational amplifier AR5 and the triode Q2, the noise reduction of the signals is adjusted, and the stability of the signals is further ensured;
the specific structure of the conditioning noise reduction module comprises that a non-inverting input end of an operational amplifier AR1 is connected with one end of a resistor R5, one end of a resistor R6, one end of a capacitor C3, the anode of a diode D5, the cathode of a diode D6 and a non-inverting input end of an operational amplifier AR2, an inverting input end of the operational amplifier AR1 is connected with one end of a capacitor C2 and one end of a resistor R4, the other end of a resistor R4 is connected with the other end of a capacitor C4, an output end of the operational amplifier AR4 is connected with the other end of the resistor R4 and one end of the resistor R4, the inverting input end of the operational amplifier AR4 and the non-inverting input end of the operational amplifier AR4, the inverting input end of the resistor R4 is connected with the other end of a triode R4, the collector of the operational amplifier AR4 and the cathode of the non-inverting input end of the operational amplifier AR4, the operational amplifier AR4 is connected with the cathode of the non-inverting input end of the operational amplifier AR4, the diode AR4, the non-inverting, The anode of the diode D6, the inverting input end of the operational amplifier AR3 is connected to one end of the resistor R9, the other end of the resistor R9 is grounded, the base of the triode Q1 is connected to the output end of the operational amplifier AR6, the resistor R12, one end of the capacitor C7 and the non-inverting input end of the operational amplifier AR5, the other end of the resistor R12 is connected to the output end of the operational amplifier AR4, the non-inverting input end of the operational amplifier AR4 is connected to the emitter of the triode Q1, the inverting input end of the operational amplifier AR5 is connected to one end of the resistor R13 and the resistor R14, the other end of the resistor R13 is grounded, the other end of the resistor R14 is connected to the base of the triode Q2, the collector of the triode Q2 is connected to the output end of the operational amplifier AR5 and the other end of the capacitor C7.
On the basis of the scheme, the filtering transmitting module uses a filter circuit consisting of an inductor L1, a capacitor C4 and a capacitor C5 to filter signals, the signals are sent into the remote monitoring terminal of the numerical control machine tool through a signal transmitter E1, when an instantaneous signal at a signal transmitting end is overlarge, the waveform is abnormal at the moment, the remote monitoring terminal of the numerical control machine tool receives the reference signal, a signal receiving value is automatically adjusted, and the screen is prevented from being remotely monitored by the numerical control machine tool;
the waveform detection module is characterized in that a wave detector J1 with the model number of AD 8313 is selected to collect the signal waveform of a signal transmitting end in the working process of the numerical control machine tool remote monitoring device, a power supply end of a wave detector J1 is connected with +5V, a grounding end of a wave detector J1 is grounded, an output end of the wave detector J1 is connected with one end of a resistor R1, the other end of a resistor R1 is connected with the negative electrode of a voltage regulator tube D1 and one end of a resistor R2, the positive electrode of a voltage regulator tube D1 is grounded, the other end of a resistor R2 is connected with one end of a resistor R3 and one end of a capacitor C1, the other end of a capacitor C1 is.
When the invention is used in particular, the numerical control machine tool remote monitoring device comprises a waveform detection module, a conditioning noise reduction module and a filtering emission module, wherein the waveform detection module collects the signal waveform of a signal emission end in the numerical control machine tool remote monitoring device during working by using a wave detector J1 with the model number of AD 8313, the conditioning noise reduction module uses an operational amplifier AR1, an operational amplifier AR2, a capacitor C2 and a capacitor C3 to form a conditioning circuit to increase the open-loop gain of a signal and stabilize the static working point of the signal, a resistor R5 and a resistor R6 are used for dividing the voltage to provide bias voltage for the operational amplifier AR1, the size of the resistor R4 can be properly adjusted according to the capacity of the capacitor C2, namely the size of the open-loop gain of the operational amplifier AR1 is adjusted, the function of an alternating current bypass at the in-phase input end of the operational amplifier AR2 is realized by using the capacitor C3 and the resistor R6, the ripple output by the operational amplifier AR, playing a role of voltage division, then buffering signals by an operational amplifier AR3, inputting the signals into an inverting input end of an operational amplifier AR6 to ensure the synchronism of the signals, comparing the signals output by the operational amplifier AR2 and the signals output by the operational amplifier AR3 by the operational amplifier AR6, and the triode Q1 is used for detecting the potential difference of the output signals of the operational amplifier AR3 and the operational amplifier AR6, the situation that the output signals of the operational amplifier AR6 are abnormal and cause inaccurate signals is avoided, finally the operational amplifier AR4 compares the potential of the emitter of the triode Q1 with the output signals of the operational amplifier AR2, the operational amplifier AR4 and the operational amplifier AR6 compare the signals twice to ensure the accuracy of the signals, the output signals of the operational amplifier AR4 and the operational amplifier AR6 are finally input into a noise reduction circuit consisting of the operational amplifier AR5 and the triode Q2, the filtering and transmitting module utilizes an inductor L1, a capacitor C4 and a capacitor C5 to form a filtering circuit to filter signals, and the filtering circuit is sent to a remote monitoring terminal of a numerical control machine through a signal transmitter E1.
While the invention has been described in further detail with reference to specific embodiments thereof, it is not intended that the invention be limited to the specific embodiments thereof; for those skilled in the art to which the present invention pertains and related technologies, the extension, operation method and data replacement should fall within the protection scope of the present invention based on the technical solution of the present invention.
Claims (3)
1. The remote monitoring device of the numerical control machine tool comprises a waveform detection module, a conditioning noise reduction module and a filtering emission module, and is characterized in that the waveform detection module collects the signal waveform of a signal emission end when the signal emission end works in the remote monitoring device of the numerical control machine tool by using a wave detector J1 with the model number of AD 8313, the conditioning noise reduction module uses an operational amplifier AR1, an operational amplifier AR2, a capacitor C2 and a capacitor C3 to form a conditioning circuit to increase the open-loop gain of a signal and stabilize the static working point of the signal, simultaneously uses a diode D5 and a diode D6 to limit the amplitude of the signal, then inputs the signal into an inverse input end of an operational amplifier AR6 after buffering the signal by using an operational amplifier AR3, the operational amplifier AR6 compares the output signals of the operational amplifier AR2 and the operational amplifier AR3, and uses a triode Q1 to detect the output signal potential difference of the operational amplifier AR3 and the operational amplifier AR6, and finally the operational amplifier AR, signals output by the operational amplifier AR4 and the operational amplifier AR6 are finally input into a noise reduction circuit consisting of the operational amplifier AR5 and the triode Q2 to reduce noise of the signals, and the filtering and transmitting module filters the signals by using a filtering circuit consisting of an inductor L1, a capacitor C4 and a capacitor C5 and transmits the signals to a remote monitoring terminal of the numerical control machine through a signal transmitter E1;
the conditioning noise reduction module comprises an operational amplifier AR1, wherein the non-inverting input end of the operational amplifier AR1 is connected with one end of a resistor R5 and R6, one end of a capacitor C3, the anode of a diode D5, the cathode of a diode D6 and the non-inverting input end of the operational amplifier AR6, the inverting input end of the operational amplifier AR6 is connected with one end of the capacitor C6 and the one end of a resistor R6, the other end of the resistor R6 is connected with the other end of the capacitor C6, the output end of the operational amplifier AR6 is connected with the other end of the resistor R6 and the non-inverting input end of the operational amplifier AR6, the inverting input end of the resistor R6 is connected with one end of the resistor R6, the non-inverting input end of the other triode Q6 of the resistor R6 and the cathode of the operational amplifier AR6, and the non-inverting input end of the operational amplifier AR6 are connected with the non-inverting input end of the diode D6, the non-inverting input end of the operational amplifier, The anode of the diode D6, the inverting input end of the operational amplifier AR3 is connected to one end of the resistor R9, the other end of the resistor R9 is grounded, the base of the triode Q1 is connected to the output end of the operational amplifier AR6, the resistor R12, one end of the capacitor C7 and the non-inverting input end of the operational amplifier AR5, the other end of the resistor R12 is connected to the output end of the operational amplifier AR4, the non-inverting input end of the operational amplifier AR4 is connected to the emitter of the triode Q1, the inverting input end of the operational amplifier AR5 is connected to one end of the resistor R13 and the resistor R14, the other end of the resistor R13 is grounded, the other end of the resistor R14 is connected to the base of the triode Q2, the collector of the triode Q2 is connected to the output end of the operational amplifier AR5 and the other end of the capacitor C7.
2. The remote monitoring device for the numerical control machine tool according to claim 1, wherein the filtering and transmitting module comprises an inductor L1, one end of the inductor L1 is connected with a resistor R15, one end of a capacitor C4 and the output end of an operational amplifier AR5, the other end of the inductor L1 is connected with a resistor R16 and one end of a capacitor C5, the other ends of the resistor R15, the capacitor C4 and the capacitor C5 are grounded, and the other end of the resistor R16 is connected with a signal transmitter E1.
3. The remote monitoring device of the numerical control machine tool according to claim 2, wherein the waveform detection module comprises a detector J1 with the model number AD 8313, a power supply end of a detector J1 is connected with +5V, a grounding end of a detector J1 is grounded, an output end of the detector J1 is connected with one end of a resistor R1, the other end of a resistor R1 is connected with a negative electrode of a voltage regulator tube D1 and one end of a resistor R2, an anode of a voltage regulator tube D1 is grounded, the other end of a resistor R2 is connected with one end of a resistor R3 and one end of a capacitor C1, the other end of a capacitor C1 is grounded, and the other end of a resistor R3 is connected with the other end.
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| CN201911272867.1A CN110806724B (en) | 2019-12-12 | 2019-12-12 | Remote monitoring device of numerical control machine tool |
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| CN201911272867.1A CN110806724B (en) | 2019-12-12 | 2019-12-12 | Remote monitoring device of numerical control machine tool |
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| CN111245376A (en) * | 2020-02-29 | 2020-06-05 | 李韬 | Electrical cabinet remote monitoring system based on Internet of things |
| CN111277331B (en) * | 2020-02-29 | 2020-10-27 | 中国通信建设第三工程局有限公司 | Optical cable signal transmission system |
| CN111508264A (en) * | 2020-04-08 | 2020-08-07 | 江苏弘扩信息科技有限公司 | Intelligent parking monitoring system based on block chain |
Family Cites Families (11)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN2225929Y (en) * | 1995-07-07 | 1996-05-01 | 清华大学 | Sound emission contact monitor |
| JP2005074545A (en) * | 2003-08-29 | 2005-03-24 | Okuma Corp | Condition monitoring device for machine tool |
| CN2857814Y (en) * | 2005-12-31 | 2007-01-17 | 哈尔滨工业大学 | Chinese medical pulse condition detector automatic regulating pulse feeling pressure |
| CN104391480B (en) * | 2014-12-04 | 2017-04-19 | 宁波市华正信息技术有限公司 | Expert system based numerically-controlled machine tool fault diagnosis system |
| CN105987801B (en) * | 2015-02-04 | 2018-06-22 | 宁夏巨能机器人系统有限公司 | The abnormal vibrations detection device and its method of a kind of numerically-controlled machine tool |
| CN205608497U (en) * | 2016-04-27 | 2016-09-28 | 蔡英 | Digit control machine tool remote monitoring device |
| CN108818154A (en) * | 2018-07-09 | 2018-11-16 | 安徽江机重型数控机床股份有限公司 | A kind of numerically-controlled machine tool with component test function |
| CN109379095B (en) * | 2018-09-30 | 2020-05-29 | 南通诚友信息技术有限公司 | Highway construction monitored control system based on thing networking |
| CN109561299B (en) * | 2018-11-27 | 2020-05-01 | 河南亿秒电子科技有限公司 | Intelligent fault analysis equipment for monitoring camera |
| CN109596483B (en) * | 2019-01-11 | 2021-04-30 | 河南鑫安利安全科技股份有限公司 | Operation environment detection system |
| CN110194415B (en) * | 2019-05-30 | 2020-01-10 | 郑州金居建筑科技有限公司 | Intelligent tower crane operation monitoring system |
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