CN116297819B - Crack detector for reinforcing ring of commutator, application device and detection method thereof - Google Patents
Crack detector for reinforcing ring of commutator, application device and detection method thereof Download PDFInfo
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- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
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- G01N27/90—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating magnetic variables for investigating the presence of flaws using eddy currents
- G01N27/9046—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating magnetic variables for investigating the presence of flaws using eddy currents by analysing electrical signals
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- G01N27/90—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating magnetic variables for investigating the presence of flaws using eddy currents
- G01N27/9006—Details, e.g. in the structure or functioning of sensors
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- G01N27/904—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating magnetic variables for investigating the presence of flaws using eddy currents with two or more sensors
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Abstract
The invention relates to a crack detector for a reinforcing ring of a commutator, which comprises the following components: the oscillating circuit comprises a potentiometer wp and an adjustable capacitor C12, and is connected with an electromagnetic sensor, wherein the electromagnetic sensor comprises a coil X1 and a coil X2, and the oscillating circuit is used for outputting alternating current to the coil X1 and the coil X2 and attenuating the reverse electromotive force generated by the reinforcing ring; the amplifying circuit is used for amplifying the alternating current signal; the precise linear rectifying circuit is used for converting an alternating current signal into a direct current signal; the control module comprises a controller and a plurality of MCU units connected with the controller; an external interaction module; the electromagnetic sensing circuit is composed of an oscillating circuit, an amplifying circuit and a precise linear rectifying circuit, and the external interaction module is connected with the control module. The beneficial effects of the invention are as follows: whether the reinforcing ring in the commutator has cracks or breaks can be effectively detected.
Description
Technical Field
The invention relates to the field of metal ring crack detection, in particular to a commutator reinforcing ring crack detector, an application device thereof and a detection method thereof.
Background
Motor commutators are of many types (as shown in fig. 1) and have the main structure of copper bars, mica sheets, reinforcing rings and phenolic resin. With the technical progress, the larger the motor power is, the smaller the volume is, the higher the rotating speed is, and the national technical standard requirements of the commutator industry are also more stringent. The commutator of the automobile and the motorcycle is required to run at 220C at 30000r/m for 5mm, the radial runout of the commutator is= <0.01mm, and the inter-segment step difference is= <0.005mm. Due to the working and experimental conditions of the commutator, more and more motor manufacturers are required to adopt steel reinforcing rings for the commutator, and heat treatment reinforcing processes are added to the reinforcing rings for the commutator of the automobile motor.
The steel reinforcing ring is punched by a high-strength steel plate on a punch press, and has small sectional area of only 1.2-3 mm 2 But there is a risk of cracking or breaking during both the stamping and heat treatment. The reinforcing ring (shown in fig. 2) with cracks or breaks cannot bear the centrifugal force of the copper bars in the high-speed rotation state of the commutator, so that the copper bars slide outwards to increase friction between the commutator and the carbon brush, and the failure of the commutator is accelerated. There must be strict control over the crack defects of the reinforcement ring.
The inventor applies for a patent name of a motor commutator metal reinforcing ring detector, a detection method and application equipment thereof in the 1 st 15 th 2014, and issued patent with the publication number of CN103792584B, which solves the problem of detecting the defect of a steel reinforcing ring of a commutator, but cannot solve the problem of detecting the crack defect or the fracture of the reinforcing ring.
Disclosure of Invention
Aiming at the defects of the prior art, the application aims to provide a crack detector for a reinforcing ring of a commutator, an application device and a detection method thereof, so as to solve the problems.
The technical scheme of the application is realized as follows: a commutator reinforcing ring crack detector, comprising:
the oscillating circuit comprises a potentiometer wp and an adjustable capacitor C12, and is connected with an electromagnetic sensor, wherein the electromagnetic sensor comprises a coil X1 and a coil X2, and the oscillating circuit is used for outputting alternating current to the coil X1 and the coil X2 and attenuating the reverse electromotive force generated by the reinforcing ring;
the amplifying circuit is used for amplifying the alternating current signal;
the precise linear rectifying circuit is used for converting an alternating current signal into a direct current signal;
the control module comprises a controller and a plurality of MCU units connected with the controller;
An external interaction module;
the electromagnetic sensing circuit is composed of an oscillating circuit, an amplifying circuit and a precise linear rectifying circuit, an external interaction module is connected with the control module, and the precise linear rectifying circuit is connected with the MCU unit through an A/D conversion unit.
By adopting the technical scheme, the oscillating circuit outputs alternating current to the coil, the coil is excited to generate a magnetic field, the coil can be equivalently regarded as a circular conductor with current I, and the magnetic field excited by the coil at the space P point basically meets the Biaose-Save theorem:
the formula shows that the value of B is proportional to the exciting current I in the coil and is the distance r from the test point P to the current element dl 2 The magnetic field of the electromagnetic sensor coil is inversely proportional and is vertical to the coil circular ring everywhere, and the magnetic field generated by the electromagnetic sensor excitation coil is almost completely restrained in the magnetic core and only exposed to air at the opening of the magnetic core because the magnetic permeability mur of the ferrite magnetic core is thousands times of the magnetic permeability of air (mur=2300 of the PC 40); the basic magnetization curve of the ferrite core (as shown in fig. 3) shows that the basic magnetization function b=f (H) of the ferrite core is nonlinear, and in the ab segment, B has the maximum change rate to H, that is to say to the exciting current I, so that the sensor must be operated in the interval as far as possible in order to improve the sensitivity and the instrument detection precision of the sensor; the reinforcing ring in the opening space of the magnetic tank has induced electromotive force epsilon which basically meets the electromagnetic induction formula:
Since the magnetic field passing through the magnetic core is concentrated at the opening of the magnetic core, and theoretical analysis and practical test by the formula (1) and the formula (2) show that the reinforcing ring and the electromagnetic sensor must have accuracyTo ensure good electromagnetic coupling: when the center of the reinforcing ring coincides with the central axis of the electromagnetic sensor and the plane of the reinforcing ring is parallel to the end face of the sensor, the induced electromotive force epsilon in the reinforcing ring is strongest; if the reinforcing ring is intact, induced eddy current is also maximum, the eddy current also generates a reverse magnetic field, and reverse electromotive force is generated in the exciting coil according to the formula (2), so that the electromagnetic oscillation in the exciting circuit is maximally attenuated, signals are amplified through the amplifying circuit, the alternating current signals are converted into direct current signals through the precise linear rectifying circuit, the induced eddy current with different intensities is generated in different states of the reinforcing ring in the exciting electromagnetic field, and in turn, attenuation with different intensities is generated on the original exciting current, and analog signals are converted into digital signals through the A/D conversion unit and are transmitted into the control module for processing; otherwise, if the reinforcing ring has cracks or breaks, eddy currents induced at the cracks or breaks cannot form a complete loop, and electromagnetic vibration of the original exciting circuit cannot be effectively attenuated; through adjusting the oscillation frequency and the amplitude and positioning the mechanical part in the circuit, the accurate adjustment of the electromagnetic gap is realized, when the reinforcing ring is intact, the output digital quantity is close to 0, when the reinforcing ring is cracked, the output digital quantity is close to a set limit value, and when the reinforcing ring is absent, the output digital quantity is larger than another set limit value, so that whether the reinforcing ring in the commutator is absent and whether the situation of cracking or breaking occurs can be effectively detected. The magnetic induction intensity B of the sensor is kept at a magnetization curve ab section as far as possible, and the condition that B is close to a saturation state is avoided, so that the detection precision is improved; on the other hand, in the commutators with different specifications, the thickness of the end face resin and the embedding depth of the reinforcing ring in the copper bar are different, namely, the distance between the plane of the reinforcing ring and the end face of the sensor is also different. From equation (1), the value of B and r can be known 2 In inverse proportion, when the distance between the reinforcing ring and the end face of the sensor increases, the value B decreases with the distance in a square relationship, and the formula (2) shows that the induced electromotive force epsilon in the reinforcing ring is related to B, the value B decreases, the induced eddy current also decreases, and the detection precision is affected, so that the value B must be properly increased. Formula (2) also shows that ε is also related toIn order to take the influence of the factors on the sensitivity into consideration, the potentiometer WP and the adjustable capacitor C12 are arranged in the oscillating circuit, so that the amplitude and the frequency of exciting current are finely adjustable, the electromagnetic gap difference caused by commutators with different specifications can be effectively corrected through the fine adjustment, the effective value of the current in the coil is digitally displayed, and the precision in detecting the commutators with different specifications is effectively improved.
The invention is further provided with: the oscillating circuit further comprises a triode Q1 and a triode Q2, one end of a coil X1 is grounded, the other end of the coil X1 is sequentially connected with an emitter of the triode Q1 through a resistor R22 and a potentiometer wp, one end of the coil X2 is grounded through an adjustable capacitor C12, the other end of the coil X2 is connected with the emitter of the triode Q1 through a capacitor C10, the coil X1 and the coil X2 are far away from the grounded end and are connected with each other, a collector and a base of the triode Q1 are respectively connected with a power VCC through a resistor R19 and a resistor R20, the collector of the triode Q1 is connected with a capacitor C11, a base of the triode Q1 is connected with the base of the triode Q2, the emitter of the triode Q2 is grounded through an adjustable capacitor C12, and the collector of the triode Q2 is connected with the power VCC through a resistor R21.
By adopting the technical scheme, alternating current can be effectively output to the coil X1 and the coil X2, so that the coil X1 and the coil X2 generate a magnetic field, and an alternating current signal is transmitted to an amplifying circuit.
The invention is further provided with: the amplifying circuit comprises an operational amplifier IC1, wherein the non-inverting input end of the operational amplifier IC1 is respectively connected with a capacitor C11, a capacitor C13 and a resistor R23 through a resistor R24, the capacitor C13, the resistor R23 and one end far away from the resistor R24 are grounded, the inverting input end of the operational amplifier IC1 is respectively connected with the output end of the operational amplifier IC1 through a resistor R25 and a resistor R26, the positive power end of the operational amplifier IC1 is connected with a power supply VCC, and the negative power end of the operational amplifier IC1 is grounded.
By adopting the technical scheme, the amplifying circuit can effectively amplify the weak signal transmitted by the oscillating circuit to the signal which has the required amplitude value and is consistent with the change rule of the original input signal, namely, the signal is amplified without distortion.
The invention is further provided with: the precise linear rectifying circuit comprises an operational amplifier IC2, a diode D10 and a diode D11, wherein the non-inverting input end of the operational amplifier IC2 is connected with the output end of the operational amplifier IC1 through a resistor R27, the non-inverting input end of the operational amplifier IC2 is connected with the output end of the operational amplifier IC2 through a diode D10, the non-inverting input end of the operational amplifier IC2 is connected with the cathode of the diode D11 through a resistor R29, the output end of the operational amplifier IC2 is connected with the anode of the diode D11, the inverting input end of the operational amplifier IC2 is connected with a common end COM through a resistor R28, and the cathode of the diode D11 is connected with the MCU unit through an A/D conversion unit.
By adopting the technical scheme, when the reinforcing ring is good or broken slightly, the output signals of the oscillating circuit and the preamplifier are very weak, and the operational amplifier IC2 in the precise linear rectifying circuit is used for secondary amplification, so that signal distortion can be effectively avoided.
The invention is further provided with: the MCU units are at least provided with two, and the number of the electromagnetic sensing circuits is the same as that of the MCU units.
Through adopting above-mentioned technical scheme, two electromagnetic sensor circuits correspond respectively and connect two electromagnetic sensors, make the electromagnetic sensor control on the commutator both ends more stable, adjust more conveniently.
The invention is further provided with: the external interaction module comprises:
the display is connected with the MCU unit;
the setting input end is connected with the MCU unit;
the laser positioning sensor is connected with the controller;
the alarm is connected with the controller;
the multifunctional detection platform communication interface is connected with the controller.
Through adopting above-mentioned technical scheme, the display can show current operating condition and the numerical value that detects, thereby can set for a limit value through setting for the input and make the numerical value that detects compare with the limit value, detect that the reinforcement circle has very crackle, and laser positioning sensor can effectively fix a position the commutator between two electromagnetic sensor to improve the precision that detects.
The utility model provides an application apparatus of commutator reinforcing ring crack detector, includes commutator reinforcing ring crack detector, still includes:
the rack is provided with a plurality of detection stations and an electromagnetic sensor;
an X-axis driving mechanism;
the Y-axis driving mechanism is arranged on the X-axis driving mechanism, and a clamping device is arranged on the Y-axis driving mechanism and used for clamping the commutator;
the Z-axis adjusting mechanism is provided with an electromagnetic sensor and is used for driving the electromagnetic sensor to move in the vertical direction;
the X-axis driving mechanism and the Y-axis driving mechanism are used for driving the reverser to move in the horizontal direction between different stations, the X-axis driving mechanism, the Y-axis driving mechanism and the Z-axis adjusting mechanism are all installed on the frame, and electromagnetic sensors on the frame and the Z-axis adjusting mechanism detect reinforcing rings in two ends of the reverser respectively.
Through adopting above-mentioned technical scheme, Z axle adjustment mechanism can adjust the interval between electromagnetic sensor and the commutator to make to consolidate and have reasonable and stable electromagnetic gap between circle and the electromagnetic sensor from top to bottom, also guaranteed that the space position that consolidates the circle place has stable magnetic induction intensity B curve, effectually improved the precision and the stability of detection.
The invention is further provided with: the central axes of the two electromagnetic sensors coincide, and the two electromagnetic sensors are symmetrically arranged at two ends of the commutator.
By adopting the technical scheme, the induced electromotive force epsilon in the reinforcing ring can be strongest, so that the detection accuracy is higher.
The invention is further provided with: the laser sensors are at least three and are arranged on the frame, and the laser sensors are arranged on the circumference taking the central axis of the electromagnetic sensor as the center of a circle.
By adopting the technical scheme, the three laser sensors arranged around the circumference of the commutator can effectively and accurately detect the position of the commutator, so that the central axis of the commutator coincides with the central axis of the electromagnetic sensor, and the detection precision of the commutator is improved.
A detection method of a crack detector for a reinforcing ring of a commutator comprises the following steps:
s1: firstly, presetting a gap and an angle between the commutator and two electromagnetic sensors according to the specification of the commutator to be detected;
s2: adjusting the amplitude and frequency of exciting current in the circuit;
s3: presetting the distance L between the laser sensor and the commutator Y1 、L Y2 、L Y3 ；
S4: the clamping device clamps the commutator, and the commutator is moved between the two electromagnetic sensors through the X-axis driving mechanism and the Y-axis driving mechanism;
S5: detecting whether the commutator moves to a designated position or not through a laser sensor, and controlling the X-axis driving mechanism and the Y-axis driving mechanism to drive the commutator to move and adjust if the commutator does not reach the designated position until the commutator reaches the designated position;
s6: transmitting electromagnetic pulses to the reinforcing ring through the electromagnetic sensor, and receiving attenuation of the electromagnetic pulses by the reinforcing ring;
s7: amplifying the alternating current signal, performing precise linear rectification and A/D conversion and outputting the amplified alternating current signal to a controller;
s8: if the reinforcing ring is intact, the output digital quantity of the reinforcing ring is close to 0, and the reinforcing ring is conveyed to the next station;
s9: if the reinforcing ring has cracks, the output digital quantity of the reinforcing ring approaches to a set limit value, the alarm gives an alarm, and sends out an NG signal, and the commutator is sent out to an NG article receiving box;
s10: if the reinforcing ring is missing, the output digital quantity is larger than the other set limit value, the alarm gives an alarm, and sends out an NG signal, and the commutator is sent out to the NG article receiving box.
By adopting the technical scheme, the micro cracks on the reinforcing ring can be effectively detected, the detection precision is high, and the detection precision can be adjusted according to different commutator specifications, so that the difference of the commutators with different specifications is corrected and compensated, and in the long-term use process, the deviation of the electrical parameters and the mechanical displacement of the instrument can be corrected and compensated, so that the stable and accurate detection of all commutator detection platforms is ensured.
Drawings
In order to more clearly illustrate the embodiments of the invention or the technical solutions of the prior art, the drawings which are used in the description of the embodiments or the prior art will be briefly described, it being obvious that the drawings in the description below are only some embodiments of the invention, and that other drawings can be obtained according to these drawings without inventive faculty for a person skilled in the art.
Fig. 1 is a top view of a prior art commutator.
Fig. 2 is a physical anatomic diagram of a crack of a reinforcing ring of a conventional commutator.
Fig. 3 is a graph showing the basic magnetization curve of a ferrite core according to an embodiment of the present invention.
Fig. 4 is a circuit diagram of an electromagnetic sensing circuit in an embodiment of the invention.
Fig. 5 is a schematic structural diagram of an application device of the crack detector for the reinforcing ring of the commutator in the embodiment of the invention.
Fig. 6 is a schematic partial structure of an application apparatus of a crack detector for a reinforcing ring of a commutator according to an embodiment of the present invention.
Fig. 7 is a schematic structural view of a Z-axis adjusting mechanism according to an embodiment of the present invention.
Fig. 8 is a cross-sectional view of a Z-axis adjustment mechanism in accordance with an embodiment of the present invention.
Fig. 9 is a schematic structural diagram of B in an embodiment of the present invention.
Fig. 10 is a schematic diagram of a distribution structure of laser sensors according to an embodiment of the present invention.
Fig. 11 is a schematic structural view of a clamping device according to an embodiment of the present invention.
Fig. 12 is a schematic structural view of an oil supply mechanism according to an embodiment of the present invention.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
As shown in fig. 3-12, the present invention discloses a crack detector for a reinforcing ring of a commutator, comprising:
the oscillating circuit comprises a potentiometer wp and an adjustable capacitor C12, the oscillating circuit is connected with an electromagnetic sensor 1, the electromagnetic sensor 1 comprises a coil X1 and a coil X2, and the oscillating circuit is used for outputting alternating current to the coil X1 and the coil X2 and attenuating the back electromotive force generated by the reinforcing ring 2;
The amplifying circuit is used for amplifying the alternating current signal;
the precise linear rectifying circuit is used for converting an alternating current signal into a direct current signal;
the control module comprises a controller and a plurality of MCU units connected with the controller;
an external interaction module;
the electromagnetic sensing circuit is composed of an oscillating circuit, an amplifying circuit and a precise linear rectifying circuit, an external interaction module is connected with the control module, and the precise linear rectifying circuit is connected with the MCU unit through an A/D conversion unit.
By adopting the technical scheme, the oscillating circuit outputs alternating current to the coil, the coil is excited to generate a magnetic field, the coil can be equivalently regarded as a circular conductor with current I, and the magnetic field excited by the coil at the space P point basically meets the Biaose-Save theorem:
the formula shows that the value of B is proportional to the exciting current I in the coil and is the distance r from the test point P to the current element dl 2 The magnetic field of the electromagnetic sensor coil is inversely proportional and is vertical to the coil circular ring everywhere, and the magnetic field generated by the electromagnetic sensor excitation coil is almost completely restrained in the magnetic core and only exposed to air at the opening of the magnetic core because the magnetic permeability mur of the ferrite magnetic core is thousands times of the magnetic permeability of air (mur=2300 of the PC 40); the basic magnetization curve of the ferrite core (as shown in fig. 3) shows that the basic magnetization function b=f (H) of the ferrite core is nonlinear, and in the ab segment, B has the maximum change rate to H, that is to say to the exciting current I, so that the sensor must be operated in the interval as far as possible in order to improve the sensitivity and the instrument detection precision of the sensor; the reinforcing ring in the opening space of the magnetic tank has induced electromotive force epsilon which basically meets the electromagnetic induction formula:
Since the magnetic field passing through the magnetic core is concentrated at the opening of the magnetic core, and theoretical analysis and practical test performed by the formula (1) and the formula (2) show that accurate positioning is required between the reinforcing ring and the electromagnetic sensor so as to ensure good electromagnetic coupling: when the center of the reinforcing ring coincides with the central axis of the electromagnetic sensor and the plane of the reinforcing ring is parallel to the end face of the sensor, the induced electromotive force epsilon in the reinforcing ring is strongest; if the reinforcing ring is intact, induced eddy current is also maximum, the eddy current also generates a reverse magnetic field, and reverse electromotive force is generated in the exciting coil according to the formula (2), so that the electromagnetic oscillation in the exciting circuit is maximally attenuated, signals are amplified through the amplifying circuit, the alternating current signals are converted into direct current signals through the precise linear rectifying circuit, the induced eddy current with different intensities is generated in different states of the reinforcing ring in the exciting electromagnetic field, and in turn, attenuation with different intensities is generated on the original exciting current, and analog signals are converted into digital signals through the A/D conversion unit and are transmitted into the control module for processing; otherwise, if the reinforcing ring is provided withIf the crack or fracture occurs, the eddy current induced at the crack or fracture cannot form a complete loop, and the electromagnetic vibration of the original exciting circuit cannot be effectively attenuated; through adjusting the oscillation frequency and the amplitude and positioning the mechanical part in the circuit, the accurate adjustment of the electromagnetic gap is realized, when the reinforcing ring is intact, the output digital quantity is close to 0, when the reinforcing ring is cracked, the output digital quantity is close to a set limit value, and when the reinforcing ring is absent, the output digital quantity is larger than another set limit value, so that whether the reinforcing ring in the commutator is absent and whether the situation of cracking or breaking occurs can be effectively detected. The magnetic induction intensity B of the sensor is kept at a magnetization curve ab section as far as possible, and the condition that B is close to a saturation state is avoided, so that the detection precision is improved; on the other hand, in the commutators with different specifications, the thickness of the end face resin and the embedding depth of the reinforcing ring in the copper bar are different, namely, the distance between the plane of the reinforcing ring and the end face of the sensor is also different. From equation (1), the value of B and r can be known 2 In inverse proportion, when the distance between the reinforcing ring and the end face of the sensor increases, the value B decreases with the distance in a square relationship, and the formula (2) shows that the induced electromotive force epsilon in the reinforcing ring is related to B, the value B decreases, the induced eddy current also decreases, and the detection precision is affected, so that the value B must be properly increased. Formula (2) also shows that ε is also related toIn order to take the influence of the factors on the sensitivity into consideration, the potentiometer WP and the adjustable capacitor C12 are arranged in the oscillating circuit, so that the amplitude and the frequency of exciting current are finely adjustable, the electromagnetic gap difference caused by commutators with different specifications can be effectively corrected through the fine adjustment, the effective value of the current in the coil is digitally displayed, and the precision in detecting the commutators with different specifications is effectively improved.
In the embodiment of the invention, the oscillating circuit further comprises a triode Q1 and a triode Q2, one end of a coil X1 is grounded, the other end of the coil X1 is sequentially connected with an emitter of the triode Q1 through a resistor R22 and a potentiometer wp, one end of the coil X2 is grounded through an adjustable capacitor C12, the other end of the coil X2 is connected with the emitter of the triode Q1 through a capacitor C10, one end of the coil X1 and the coil X2 far away from the ground is connected, a collector and a base of the triode Q1 are respectively connected with a power supply VCC through a resistor R19 and a resistor R20, a collector of the triode Q1 is connected with a capacitor C11, a base of the triode Q1 is connected with a base of the triode Q2, the emitter of the triode Q2 is grounded through an adjustable capacitor C12, and a collector of the triode Q2 is connected with the power supply VCC through a resistor R21.
By adopting the technical scheme, alternating current can be effectively output to the coil X1 and the coil X2, so that the coil X1 and the coil X2 generate a magnetic field, and an alternating current signal is transmitted to an amplifying circuit.
In the embodiment of the invention, the amplifying circuit comprises an operational amplifier IC1, wherein the non-inverting input end of the operational amplifier IC1 is respectively connected with a capacitor C11, a capacitor C13 and a resistor R23 through a resistor R24, the capacitor C13, the resistor R23 and one end far away from the resistor R24 are grounded, the inverting input end of the operational amplifier IC1 is respectively grounded through a resistor R25 and a resistor R26 and is connected with the output end thereof, the positive power supply end of the operational amplifier IC1 is connected with a power supply VCC, and the negative power supply end of the operational amplifier IC1 is grounded
By adopting the technical scheme, the amplifying circuit can effectively amplify the weak signal transmitted by the oscillating circuit to the signal which has the required amplitude value and is consistent with the change rule of the original input signal, namely, the signal is amplified without distortion.
In the embodiment of the invention, the precise linear rectifying circuit comprises an operational amplifier IC2, a diode D10 and a diode D11, wherein the non-inverting input end of the operational amplifier IC2 is connected with the output end of the operational amplifier IC1 through a resistor R27, the non-inverting input end of the operational amplifier IC2 is connected with the output end of the operational amplifier IC2 through the diode D10, the negative electrode of the diode D11 is connected with the positive electrode of the diode D11 through a resistor R29, the output end of the operational amplifier IC2 is connected with the positive electrode of the diode D11, the inverting input end of the operational amplifier IC2 is connected with the common end COM through a resistor R28, and the negative electrode of the diode D11 is connected with the MCU unit through an A/D conversion unit.
By adopting the technical scheme, when the reinforcing ring is good or broken slightly, the output signals of the oscillating circuit and the preamplifier are very weak, and the operational amplifier IC2 in the precise linear rectifying circuit is used for secondary amplification, so that signal distortion can be effectively avoided.
In the embodiment of the invention, at least two MCU units are arranged, and the number of the electromagnetic sensing circuits is the same as that of the MCU units.
Through adopting above-mentioned technical scheme, two electromagnetic sensor circuits correspond respectively and connect two electromagnetic sensors, make the electromagnetic sensor control on the commutator both ends more stable, adjust more conveniently.
In an embodiment of the present invention, the external interaction module includes:
the display is connected with the MCU unit;
the setting input end is connected with the MCU unit;
the laser positioning sensor is connected with the controller;
the alarm is connected with the controller;
the multifunctional detection platform communication interface is connected with the controller.
Through adopting above-mentioned technical scheme, the display can show current operating condition and the numerical value that detects, thereby can set for a limit value through setting for the input and make the numerical value that detects compare with the limit value, detect that the reinforcement circle has very crackle, and laser positioning sensor can effectively fix a position the commutator between two electromagnetic sensor to improve the precision that detects.
The utility model provides an application apparatus of commutator reinforcing ring crack detector, includes commutator reinforcing ring crack detector, still includes:
the machine frame 3 is provided with a plurality of detection stations, and the machine frame 3 is provided with an electromagnetic sensor 1;
an X-axis driving mechanism 4;
the Y-axis driving mechanism 6 is arranged on the X-axis driving mechanism 4, the Y-axis driving mechanism 6 is provided with a clamping device 8, and the clamping device 8 is used for clamping the commutator;
the Z-axis adjusting mechanism 5 is provided with an electromagnetic sensor 1, and the Z-axis adjusting mechanism 5 is used for driving the electromagnetic sensor 1 to move in the vertical direction;
the X-axis driving mechanism 4 and the Y-axis driving mechanism 6 are used for driving the reverser to move in the horizontal direction between different stations, the X-axis driving mechanism 4, the Y-axis driving mechanism 6 and the Z-axis adjusting mechanism 5 are all installed on the frame 3, and the electromagnetic sensor 1 on the frame 3 and the electromagnetic sensor 1 on the Z-axis adjusting mechanism 5 respectively detect the reinforcing rings 2 in two ends of the reverser.
Through adopting above-mentioned technical scheme, Z axle adjustment mechanism can adjust the interval between electromagnetic sensor and the commutator to make to consolidate and have reasonable and stable electromagnetic gap between circle and the electromagnetic sensor from top to bottom, also guaranteed that the space position that consolidates the circle place has stable magnetic induction intensity B curve, effectually improved the precision and the stability of detection.
In the embodiment of the present invention, the Z-axis adjusting mechanism 5 includes:
the transmission rod 50, the outer wall of the transmission rod 50 is provided with a left-handed first thread and a right-handed second thread, the first thread and the second thread are overlapped, the upper part of the inner wall of the transmission rod 50 is provided with a third thread 510, and the lower part of the inner wall of the transmission rod 50 is provided with a sliding hole 511;
the outer tube 51, there is a fourth screw thread cooperating with first screw thread on the inner wall of the outer tube 51;
the adjusting rod 52, the outer wall of the adjusting rod 52 is provided with a fifth thread 520 matched with the third thread 510, and the lower end of the inner wall of the adjusting rod 52 is provided with a sixth thread 521;
the connecting rod 53, the connecting rod 53 includes a threaded portion 530 and a straight rod portion 531, a seventh thread 5300 matching with the sixth thread 521 is provided on the outer wall of the threaded portion 530, and the straight rod portion 531 is slidably connected in the sliding hole 511;
wherein, a limiting mechanism for limiting the rotation of the connecting rod 53 is arranged between the transmission rod 50 and the straight rod 531, the pitch of the fifth thread 520 is larger than that of the sixth thread 521, the lower end of the straight rod 531 is connected with the electromagnetic sensor 1 through the mounting plate 54, and the outer tube 51 is fixedly mounted on the frame 3 through the bracket 55.
Through adopting above-mentioned technical scheme, the transmission rod 50 is rotated and makes it reciprocate in the outer tube 51 and carries out the regulation of big distance, realize holistic fast forward and fast backward, after reaching nearly position, the rethread rotary adjustment pole 52 carries out the accurate adjustment to the position of connecting rod 53, because the pitch of fifth screw thread 520 is greater than the pitch of sixth screw thread 521, so when the pitch of connecting rod 53 is the pitch difference of fifth screw thread 520 and sixth screw thread 521 in the vertical direction after adjusting pole 52 round of rotation, therefore when the pitch difference of fifth screw thread 520 and sixth screw thread 521 is very little, accurate regulation has just been realized, the electromagnetic sensor 1 on the Z axle adjustment mechanism 5 and the pitch adjustment between the commutator are more accurate, the effectual precision that detects that has improved, can not take place the rotation through stop gear's effect and can only carry out the vertical direction removal by connecting rod 53.
In an embodiment of the present invention, the limiting mechanism includes:
the limiting groove 56 is vertically formed on the outer wall of the straight rod part 531;
the bolt 57, the bolt 57 passes the lateral wall of transfer line 50 and stretches into in the spacing groove 56.
Through adopting above-mentioned technical scheme, when adjusting lever 52 rotates, can effectually restrict connecting rod 53 and take place to rotate to make the regulation to connecting rod 53 in the vertical direction more accurate.
In an embodiment of the present invention, the method further includes:
the fixing nut 58, the inner wall of the fixing nut 58 is provided with an eighth thread matched with the second thread;
the collar 59, the inner wall of the collar 59 is annularly provided with a raised line 590, the inner diameter of the raised line 590 is smaller than the maximum diameter of the fixed nut 58 and the transmission rod 50, the inner wall of the collar 59 is provided with a corrugated outline, and the collar 59 is made of elastic metal;
wherein, the fixed nut 58 is propped against the top end of the outer tube 51 when being screwed on the transmission rod 50 through the second thread and the eighth thread, a chamfer is arranged on the edge of one end of the fixed nut 58 contacted with the transmission rod 50, the convex strip 590 is matched with the chamfer on the fixed nut 58 and the transmission rod 50, and the lantern ring 59 is sleeved outside the top ends of the fixed nut 58 and the outer tube 51.
By adopting the above technical scheme, since the outer wall of the transmission rod 50 is provided with two threads with opposite directions, the outer tube 51 is matched with the first thread of the left screw, and the fixing nut 58 is matched with the second thread of the right screw, the fixing nut 58 can effectively abut against the outer tube 51 to fix the transmission rod 50; the collar 59 can be effectively sleeved on the fixing nut 58 and the outer tube 51, so that relative rotation of the fixing nut 58 and the outer tube is effectively prevented, the installation stability of the fixing nut 58 is improved, and looseness is not easy to occur.
In an embodiment of the present invention, the clamping device 8 includes:
a cylinder 80;
a left slider 81;
a right slider 82;
a left clamping piece 83, a first threaded hole 830 is formed in the left clamping piece 83 in a penetrating manner, and the left clamping piece 83 is mounted on the left side of the left sliding block 81 through a bolt 87;
the right clamping piece 84, a second threaded hole 840 is formed in the right clamping piece 84 in a penetrating manner, and the right clamping piece 84 is mounted on the right side of the right sliding block 82 through a bolt 87;
the left end of the first threaded rod 85 is provided with external threads corresponding to the first threaded hole 830, the right end of the first threaded rod 85 extends out through the left sliding block 81, and the right end of the first threaded rod 85 is provided with a transmission hole 850 with a square section;
the right end of the second threaded rod 86 is provided with external threads corresponding to the second threaded hole 840, the left end of the second threaded rod 86 extends out through the right sliding block 82, and the left end of the second threaded rod 86 is inserted into the transmission hole 850 to be in matched transmission connection;
wherein, the left slider 81 and the right slider 82 are slidably connected to the cylinder 80, and the first screw hole 830 and the second screw hole 840 have opposite screw directions.
Through adopting above-mentioned technical scheme, when rotating first threaded rod 85, loosen bolt 87 earlier, the cooperation of rethread drive hole 850 and second threaded rod 86 left end enables the synchronous rotation of first threaded rod 85 and second threaded rod 86, because the screw thread opposite direction of first screw hole 830 and second screw hole 840, consequently can realize that left clamping piece 83 and right clamping piece 84 are close to each other or keep away from each other when first threaded rod 85 and second threaded rod 86 rotate, thereby adjust the interval between left clamping piece 83 and the right clamping piece 84 to required distance, make clamping device 8 can press from both sides the commutator of getting different specifications, use more nimble, lock bolt 87 again after the adjustment, further improved the connection stability between clamping piece and the slider.
In an embodiment of the present invention, the clamping device 8 further comprises:
a retaining washer 88, said retaining washer 88 being arranged between the first threaded rod 85 and the left slider 81 and between the second threaded rod 86 and the right slider 82.
Through adopting above-mentioned technical scheme, the anti-return washer 88 can effectually prevent taking place axial float between first threaded rod 85 and the left slider 81 and between second threaded rod 86 and the right slider 82, makes the connection between clamping piece and the slider more stable.
In the embodiment of the present invention, a rotating wheel 89 is protruded on the outer wall of the first threaded rod 85.
Through adopting above-mentioned technical scheme, accessible twist and rotate wheel 89 and drive first threaded rod 85 and rotate, make the operation to first threaded rod 85 more convenient, light.
In the embodiment of the present invention, the Y-axis driving mechanism 6 includes:
a ball screw 60;
a screw nut 61, wherein an oil supply channel 610 for supplying lubricating oil to the balls is arranged on the screw nut 61;
a drive motor 62, the drive motor 62 being mounted on the moving part of the X-axis drive mechanism 4;
the oil supply mechanism is used for supplying lubricating oil to the oil supply channel;
wherein, the ball screw 60 is connected with an output shaft of a driving motor 62 in a transmission way, and the screw nut 61 is connected with the clamping device 8.
Through adopting above-mentioned technical scheme, driving motor 62 drives ball screw 60 and rotates for screw nut 61 moves on ball screw 60, thereby drives clamping device 8 and carries out the ascending removal of Y axle direction, and oil feeding mechanism can effectually lubricate the ball through lubricating oil, makes the operation of Y axle actuating mechanism 6 more smooth and easy, effectual prolonged instruction.
In an embodiment of the present invention, the oil supply mechanism includes:
the oil tank 63, the said oil tank 63 has the first pressure sensor 68;
an oil pump 64;
a filter 65;
a first pipeline 66, wherein a regulating valve 67 capable of regulating the flow rate is arranged on the first pipeline 66;
the second pressure sensor 69 is connected in the oil supply channel 610, the oil pump 64 is connected between the oil tank 63 and the inlet end of the filter 65, and the outlet end of the filter 65 is connected with the oil supply channel 610.
By adopting the technical scheme, the oil pump 64 filters the lubricating oil in the oil tank 63 and sends the lubricating oil into the oil supply channel 610 through the filter 65, and one part of the lubricating oil sent by the oil pump 64 enters the filter 65 and the other part of the lubricating oil flows back into the oil tank 63 through the first pipeline 66, so that the condition of excessive lubricating oil in the oil supply channel 610 can be effectively avoided; the first pressure sensor 68 can detect the pressure value in the oil tank 63, the second pressure sensor 69 can detect the pressure value in the oil supply channel 610, and by calculating the difference between the pressure values in the oil tank 63 and the pressure value in the oil supply channel 610 and comparing the difference with the preset pressure value difference, if the pressure value difference between the oil tank 63 and the pressure value in the oil supply channel 610 is larger than the preset pressure value difference, the regulating valve 67 is controlled to increase the flow and increase the quantity of the backflow of the lubricating oil, so that the oil supply quantity of the oil supply channel 610 is increased, and if the pressure value difference between the oil tank 63 and the pressure value in the oil supply channel 610 is smaller than the preset pressure value difference, the regulating valve 67 is controlled to decrease the flow and reduce the quantity of the backflow of the lubricating oil, so that the occurrence of excessive or lack of the lubricating oil in the oil supply channel 610 is effectively avoided, the control and the regulation are more convenient, and the lubrication efficiency is improved.
In the embodiment of the invention, the central axes of the two electromagnetic sensors 1 are coincident, and the two electromagnetic sensors 1 are symmetrically arranged at two ends of the commutator.
By adopting the technical scheme, the induced electromotive force epsilon in the reinforcing ring can be strongest, so that the detection accuracy is higher.
In the embodiment of the present invention, the laser sensors 7 are provided at least three and mounted on the frame 3, and the laser sensors 7 are provided on a circumference centered on the center axis of the electromagnetic sensor 1.
By adopting the technical scheme, the three laser sensors 7 circumferentially arranged around the commutator can effectively and accurately detect the position of the commutator, so that the central axis of the commutator coincides with the central axis of the electromagnetic sensor 1, and the detection precision of the commutator is improved.
A detection method of a crack detector for a reinforcing ring of a commutator comprises the following steps:
s1: firstly, presetting a gap and an angle between the commutator and two electromagnetic sensors 1 according to the specification of the commutator to be detected;
s2: adjusting the amplitude and frequency of exciting current in the circuit;
s3: the distance L between the laser sensor 7 and the commutator is preset Y1 、L Y2 、L Y3 ；
S4: the clamping device 8 clamps the commutator, and the commutator is moved between the two electromagnetic sensors 1 through the X-axis driving mechanism 4 and the Y-axis driving mechanism 6;
S5: detecting whether the commutator moves to a designated position or not through a laser sensor 7, and controlling the X-axis driving mechanism 4 and the Y-axis driving mechanism 6 to drive the commutator to move and adjust if the designated position is not reached until the designated position is reached;
s6: electromagnetic pulses are sent to the reinforcing ring 2 through the electromagnetic sensor 1, and attenuation of the electromagnetic pulses by the reinforcing ring 2 is received;
s7: amplifying the alternating current signal, performing precise linear rectification and A/D conversion and outputting the amplified alternating current signal to a controller;
s8: if the reinforcing ring 2 is intact, the output digital quantity of the reinforcing ring is approximately 0, and the reinforcing ring is conveyed to the next station;
s9: if the reinforcing ring 2 has cracks, the output digital quantity of the reinforcing ring is close to a set limit value, the alarm gives an alarm, and sends out an NG signal, and the commutator is sent out to an NG article receiving box;
s10: if the reinforcing ring 2 is missing, the output digital quantity is larger than the other set limit value, the alarm gives an alarm, and sends out an NG signal, and the commutator is sent out to the NG article receiving box.
By adopting the technical scheme, the micro cracks on the reinforcing ring can be effectively detected, the detection precision is high, and the detection precision can be adjusted according to different commutator specifications, so that the difference of the commutators with different specifications is corrected and compensated, and in the long-term use process, the deviation of the electrical parameters and the mechanical displacement of the instrument can be corrected and compensated, so that the stable and accurate detection of all commutator detection platforms is ensured.
In the embodiment of the present invention, the detecting and adjusting method in step S5 includes the following steps:
a: the laser sensor 7 continuously emits a plurality of laser signals towards the same outer wall of the commutator at different moments within a certain time, the laser sensor 7 records the emitting time, the laser signals are reflected back to the laser sensor 7 through the commutator, each laser signal has a starting point and an ending point, the ending points of other laser signals are equivalent to the ending point of the first laser signal and have different delays, and the delay value of the J-th laser signal isWherein T is the period of an input timer signal, Z is the total number of laser signals, J and Z are integers, and J is more than or equal to 2 and less than or equal to Z;
b: counting and quantizing the input timer signal in a time range between a starting point of the first laser signal and an ending point of each laser signal to obtain a corresponding count value S;
c: by average of individual count values SThe period T of the input timer signal and the light velocity C are used for calculating the commutationDistance between laser sensors 7>Wherein a is a times of counting result S in Z times of laser signals, the rest Z-a times are S+1, and P is the propagation time of laser;
d: obtaining the distance L between each laser sensor 7 and the commutator S1 、L S2 、L S3 And is connected with L Y1 、L Y2 、L Y3 Comparing, and if the values are the same or the difference ranges are within +/-0.5 mm, namely the commutator is considered to reach the designated position;
e: if the phase difference is greater than + -0.5 mm, and L S1 Greater than L Y1 The X-axis driving mechanism 4 is controlled to drive the reverser to move leftwards and rightwards if the reverser moves leftwards, if L S3 Greater than L Y3 The X-axis driving mechanism 4 is controlled to drive the reverser to move rightwards, otherwise, the reverser moves leftwards, if L S2 Greater than L Y2 And the Y-axis driving mechanism 6 is controlled to drive the reverser to move upwards, otherwise, the reverser moves downwards until reaching the designated position.
By adopting the technical scheme, the starting point of the laser signal is the time point recorded when the laser signal is emitted, the ending point of the laser signal is the time point recorded when the laser signal reflected by the commutator is received, the input timer signal is counted and quantized in the time range between the starting point of the first laser signal and the ending point of each laser signal, and the obtained multiple count values, the distance between the laser sensor 7 and the commutator and the propagation time of the laser can show that the propagation time of the laser is not counted as the proportion of the period T of the timer signal Thereby effectively improving the measurement accuracy of the laser sensor 7; the smaller the period T of the input timer signal, the smaller the distance change that can be recognized by the laser sensor 7, the more accurate the measurement thereofThe higher the value of the total number Z of laser signals, the higher the measurement accuracy of the laser sensor 7; and by combining L S1 、L S2 、L S3 And L is equal to Y1 、L Y2 、L Y3 The horizontal position of the commutator between the two electromagnetic sensors 1 is moved by comparing, so that the detection and adjustment of the commutator are more accurate, and the detection precision of the magnetic sensors 1 on the commutator is effectively improved.
The foregoing description of the preferred embodiments of the invention is not intended to be limiting, but rather is intended to cover all modifications, equivalents, alternatives, and improvements that fall within the spirit and scope of the invention.
Claims (8)
1. A commutator reinforcing ring crack detector, comprising:
the oscillating circuit comprises a potentiometer wp and an adjustable capacitor C12, the oscillating circuit is connected with an electromagnetic sensor (1), the electromagnetic sensor (1) comprises a coil X1 and a coil X2, and the oscillating circuit is used for outputting alternating current to the coil X1 and the coil X2 and attenuating the reverse electromotive force generated by the reinforcing ring (2);
The amplifying circuit is used for amplifying the alternating current signal;
the precise linear rectifying circuit is used for converting an alternating current signal into a direct current signal;
the control module comprises a controller and a plurality of MCU units connected with the controller;
an external interaction module;
the external interaction module is connected with the control module, and the precise linear rectifying circuit is connected with the MCU unit through the A/D conversion unit; the oscillating circuit further comprises a triode Q1 and a triode Q2, wherein one end of a coil X1 is grounded, the other end of the coil X1 is sequentially connected with an emitter of the triode Q1 through a resistor R22 and a potentiometer wp, one end of the coil X2 is grounded through an adjustable capacitor C12, the other end of the coil X2 is connected with the emitter of the triode Q1 through a capacitor C10, one end, far away from the ground, of the coil X1 and the coil X2 is connected with a power supply VCC through a resistor R19 and a resistor R20, the collector of the triode Q1 is connected with a capacitor C11, the base of the triode Q1 is connected with the base of the triode Q2, the emitter of the triode Q2 is grounded through an adjustable capacitor C12, and the collector of the triode Q2 is connected with the power supply VCC through a resistor R21; the MCU units are at least provided with two, and the number of the electromagnetic sensing circuits is the same as that of the MCU units.
2. The detector as claimed in claim 1, wherein the amplifying circuit comprises an operational amplifier IC1, the non-inverting input terminal of the operational amplifier IC1 is respectively connected to a capacitor C11, a capacitor C13 and a resistor R23 through a resistor R24, the capacitor C13, the resistor R23 and one end far away from the resistor R24 are grounded, the inverting input terminal of the operational amplifier IC1 is respectively connected to the output terminal thereof through a resistor R25 and a resistor R26, the positive power supply terminal of the operational amplifier IC1 is connected to a power supply VCC, and the negative power supply terminal of the operational amplifier IC1 is grounded.
3. The detector for cracks of the reinforced ring of the commutator as defined in claim 2, wherein the precise linear rectifying circuit comprises an operational amplifier IC2, a diode D10 and a diode D11, wherein the non-inverting input end of the operational amplifier IC2 is connected with the output end of the operational amplifier IC1 through a resistor R27, the output end of the operational amplifier IC2 through the diode D10, the negative electrode of the diode D11 through a resistor R29, the negative electrode of the diode D10 is connected with the positive electrode of the diode D11, the output end of the operational amplifier IC2 is connected with the positive electrode of the diode D11, the inverting input end of the operational amplifier IC2 is connected with the common end COM through a resistor R28, and the negative electrode of the diode D11 is connected with the MCU unit through the a/D converting unit.
4. The commutator reinforcing ring crack detector of claim 1, wherein the external interaction module comprises:
the display is connected with the MCU unit;
the setting input end is connected with the MCU unit;
the laser positioning sensor is connected with the controller;
the alarm is connected with the controller;
the multifunctional detection platform communication interface is connected with the controller.
5. A commutator reinforcing ring crack detector application apparatus comprising a commutator reinforcing ring crack detector as defined in any one of claims 1-4, further comprising:
the machine comprises a frame (3), wherein a plurality of detection stations are arranged on the frame (3), and an electromagnetic sensor (1) is arranged on the frame (3);
an X-axis driving mechanism (4);
the Y-axis driving mechanism (6), the Y-axis driving mechanism (6) is arranged on the X-axis driving mechanism (4), the Y-axis driving mechanism (6) is provided with a clamping device (8), and the clamping device (8) is used for clamping the commutator;
the Z-axis adjusting mechanism (5), the electromagnetic sensor (1) is arranged on the Z-axis adjusting mechanism (5), and the Z-axis adjusting mechanism (5) is used for driving the electromagnetic sensor (1) to move in the vertical direction;
The X-axis driving mechanism (4) and the Y-axis driving mechanism (6) are used for driving the reverser to move in the horizontal direction between different stations, the X-axis driving mechanism (4), the Y-axis driving mechanism (6) and the Z-axis adjusting mechanism (5) are all installed on the frame (3), and the electromagnetic sensor (1) on the frame (3) and the electromagnetic sensor (1) on the Z-axis adjusting mechanism (5) detect reinforcing rings (2) in two ends of the reverser respectively.
6. The application device of the crack detector for the reinforcing ring of the commutator according to claim 5, wherein the central axes of the two electromagnetic sensors (1) are coincident, and the two electromagnetic sensors (1) are symmetrically arranged at two ends of the commutator.
7. The apparatus for applying a crack detector to a reinforcement ring of a commutator as defined in claim 5, further comprising:
and laser sensors (7), wherein the laser sensors (7) are at least three and are arranged on the frame (3), and the laser sensors (7) are arranged on the circumference taking the central axis of the electromagnetic sensor (1) as the center of a circle.
8. A detection method of a crack detector for a reinforced ring of a commutator, which is applied to the application equipment of the crack detector for the reinforced ring of the commutator as claimed in any one of claims 5 to 7, and is characterized by comprising the following steps:
S1: firstly, presetting a gap and an angle between the commutator and two electromagnetic sensors (1) according to the specification of the commutator to be detected;
s2: adjusting the amplitude and frequency of exciting current in the circuit;
s3: presetting the distance L between the laser sensor (7) and the commutator Y1 、L Y2 、L Y3 ；
S4: the clamping device (8) clamps the commutator, and the commutator is moved between the two electromagnetic sensors (1) through the X-axis driving mechanism (4) and the Y-axis driving mechanism (6);
s5: detecting whether the commutator moves to a designated position or not through a laser sensor (7), and controlling an X-axis driving mechanism (4) and a Y-axis driving mechanism (6) to drive the commutator to move and adjust if the commutator does not reach the designated position until the commutator reaches the designated position;
s6: electromagnetic pulses are sent to the reinforcing ring (2) through the electromagnetic sensor (1), and attenuation of the electromagnetic pulses by the reinforcing ring (2) is received;
s7: amplifying the alternating current signal, performing precise linear rectification and A/D conversion and outputting the amplified alternating current signal to a controller;
s8: if the reinforcing ring (2) is intact, the output digital quantity of the reinforcing ring is approximately 0, and the reinforcing ring is conveyed to the next station;
s9: if the reinforcing ring (2) has cracks, the output digital quantity of the reinforcing ring is close to a set limit value, the alarm gives an alarm, and sends an NG signal, and the commutator is sent to an NG article receiving box;
S10: if the reinforcing ring (2) is missing, the output digital quantity of the reinforcing ring is larger than the other set limit value, the alarm gives an alarm, and sends an NG signal to send the commutator to the NG article receiving box.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311002872.7A CN117849168A (en) | 2022-11-25 | 2022-11-25 | Detection method of commutator reinforcing ring crack detector applied to application equipment of commutator reinforcing ring crack detector |
| CN202211490191.5A CN116297819B (en) | 2022-11-25 | 2022-11-25 | Crack detector for reinforcing ring of commutator, application device and detection method thereof |
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| CN202211490191.5A Active CN116297819B (en) | 2022-11-25 | 2022-11-25 | Crack detector for reinforcing ring of commutator, application device and detection method thereof |
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Citations (6)
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| GB1559577A (en) * | 1975-10-17 | 1980-01-23 | Libandor Trading Corp Inc | Method of checking coins and coin checking apparatus for the aforesaid method |
| TW201326801A (en) * | 2011-12-29 | 2013-07-01 | Ind Tech Res Inst | Electromagnetic coupling measurement device of self-excited oscillation type |
| CN103792584A (en) * | 2014-01-15 | 2014-05-14 | 利达机电有限公司 | Motor reverser metal reinforcing ring detector, detecting method and application equipment |
| CN104137161A (en) * | 2012-02-08 | 2014-11-05 | 可撒特有限公司 | Metallic conductor disturbance detection device and method |
| CN204514265U (en) * | 2015-04-21 | 2015-07-29 | 黄炳东 | A kind of displacement detecting circuit based on transformer |
| CN111342317A (en) * | 2020-04-04 | 2020-06-26 | 利达机电有限公司 | Full-automatic commutator production equipment |
-
2022
- 2022-11-25 CN CN202311002872.7A patent/CN117849168A/en active Pending
- 2022-11-25 CN CN202211490191.5A patent/CN116297819B/en active Active
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|---|---|---|---|---|
| GB1559577A (en) * | 1975-10-17 | 1980-01-23 | Libandor Trading Corp Inc | Method of checking coins and coin checking apparatus for the aforesaid method |
| TW201326801A (en) * | 2011-12-29 | 2013-07-01 | Ind Tech Res Inst | Electromagnetic coupling measurement device of self-excited oscillation type |
| CN104137161A (en) * | 2012-02-08 | 2014-11-05 | 可撒特有限公司 | Metallic conductor disturbance detection device and method |
| CN103792584A (en) * | 2014-01-15 | 2014-05-14 | 利达机电有限公司 | Motor reverser metal reinforcing ring detector, detecting method and application equipment |
| CN204514265U (en) * | 2015-04-21 | 2015-07-29 | 黄炳东 | A kind of displacement detecting circuit based on transformer |
| CN111342317A (en) * | 2020-04-04 | 2020-06-26 | 利达机电有限公司 | Full-automatic commutator production equipment |
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| Title |
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| method for basic measurement adjustment of commutator profiles;Yu.S. Borovikov et al.;《Bulletin of the Томsк Pоlytеchnic University》;第310卷(第3期);第89-92页 * |
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| CN116297819A (en) | 2023-06-23 |
| CN117849168A (en) | 2024-04-09 |
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