CN108268929B - Double-path passive hard tag magnetic inserting device and control method thereof - Google Patents
Double-path passive hard tag magnetic inserting device and control method thereof Download PDFInfo
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Abstract
The invention discloses a double-path passive hard tag magnetic inserting device and a control method thereof. The device has simple structure and stable operation; the adopted double-path piezomagnetic design fully exerts the manual feeding speed and improves the production efficiency; the designed double-path down-pressure control flow and method can effectively control the insertion depth of the magnetic rod and ensure the accuracy of the resonant frequency of the hard tag; in addition, the device also has a sorting function on defective passive hard tags, and the device and the control method thereof provide technical support for full-automatic production of the hard tags.
Description
Technical field:
the invention belongs to the technical field of electronic tags, and particularly relates to a device for a magnetic insertion procedure in a passive hard tag production process and a control method thereof.
The background technology is as follows:
domestic passive hard tag production is concentrated in small micro enterprises in Zhejiang zone, the automation level of the whole production process of the passive hard tag is low, the key magnetic insertion process, namely the magnetic rod is inserted into a framework wound with a coil, so as to adjust the inductance value in a hard tag resonant loop, the series loop resonant frequency formed by the hard tag inductance and capacitance meets the industry requirement (for example, the industry requirement of the resonant frequency of the hard tag based on the acousto-magnetic technology is 58kHz + -0.1 kHz), and the passive hard tag is in a manual stage. The manual magnetic insertion control has the defects of low accuracy of the resonance frequency of the passive hard tag, poor consistency of products, time and labor consumption, low production efficiency, need of re-checking the quality of the tag and the like.
Referring to related documents, the current equipment for inserting magnetic procedures and the control method thereof are rarely reported, and domestic and foreign scholars have more research on the detection technology of the working frequency of the tag. According to the basic standard requirements of the standard such as ISO/IEC 18046-3-2007 on the electronic tag test for the EAS system, the electronic tag test can be mainly divided into a single-coil structure and a double-coil structure according to the probe structure. Niu Yuanhai and Song Xiaofeng show that the single-coil probe detection method can indirectly detect the resonance frequency of the electronic tag. Yang Chengzhong, zhu Yaping, etc. the dual-coil probe detection model study shows that: the coupling coefficient value of the transmitting coil and the passive electronic tag is increased, and the center frequency of the test is greatly shifted. To overcome the above problems with dual coils, patent CN102735943A, CN106443826a each provides a method for eliminating center frequency offset, cheng Qingyuan et al propose a four-coil, three-coil sensing probe structure, and build a corresponding detection model, whose resonance frequency test performance is significantly better than that of the commercially available EAS frequency detector (E-X5006 AM). Patent 201710566364.X shows a hard tag magnetic inserting device and a control method thereof, but only one path of the device is pressed down, the working efficiency is not obvious compared with that of manual work, the control method adopts a constant frequency control pressing step and a frequency hopping control pressing step, the control strategy is complex, and in addition, the device does not relate to a product quality sorting function.
The invention comprises the following steps:
therefore, the invention aims to solve the technical problems that in the prior art, the manual operation is used for controlling the insertion position of the magnetic rod of the passive hard tag, the production efficiency of the method is low, the consistency of the product quality is poor, the labor cost is high, and in order to realize the robot replacement of the process in the production process of the passive hard tag, the invention provides a two-way passive hard tag magnetic insertion device and a control method thereof.
In order to achieve the above purpose, the technical scheme of the invention is as follows:
a two-way passive hard tag magnetic device comprising:
the rack, the rack upper surface is provided with the support frame, be provided with the block terminal on one lateral wall of rack, be provided with the advance motor on another lateral wall of rack, the advance motor is connected with worm gear reducer, the first end of bull stick is connected to worm gear reducer, the second end of bull stick is pegged graft in the bearing frame, the bearing frame is fixed to be set up in the rack, the plug bush has synchronous gyro wheel on the bull stick, be provided with the hold-in range on the synchronous gyro wheel, the interval is provided with a plurality of crossbeams on the hold-in range, parallel arrangement has two magnet sockets on the crossbeam, the upper surface of crossbeam is provided with the advance position sensor that corresponds, be provided with in the rack with the advance position sensor that the advance position sensor corresponds.
The novel automatic pressure control device is characterized in that a left stepping motor, a middle stepping motor and a right stepping motor are arranged on the supporting frame, a left pressure rod is arranged below the left stepping motor, a left sleeve is sleeved outside the left pressure rod, a left sensitive probe is arranged on the outer side wall of the lower end of the left sleeve, a right pressure rod is arranged below the right stepping motor, a right sleeve is sleeved outside the right pressure rod, and a right sensitive probe is arranged on the outer side wall of the lower end of the right sleeve.
As the preference of above-mentioned technical scheme, left stepper motor's output shaft is connected with left lead screw through the shaft coupling, the spiro union has left movable block on the left lead screw, the front end of left movable block is fixedly provided with cylindrical left pressure stick, the lateral wall of left movable block is provided with left position sensing piece, be provided with on the support frame with left upper position sensor and left lower position sensor that left position sensing piece corresponds.
As the preference of above-mentioned technical scheme, right stepper motor's output shaft is connected with right lead screw through the shaft coupling, the spiro union has right movable block on the right lead screw, the front end of right movable block is fixed to be provided with columniform right pressure stick, the lateral wall of right movable block is provided with right position sensing piece, be provided with on the support frame with right upper position sensor and right lower position sensor that right position sensing piece corresponds.
As the preference of above-mentioned technical scheme, the output shaft of well stepper motor has well lead screw through the shaft coupling, the spiro union has well movable block on the well lead screw, the lateral wall of well movable block is provided with the position sensing piece, be provided with on the support frame with well position sensor and the well lower position sensor that the position sensing piece corresponds, the front end of well movable block is fixed and is provided with horizontal connecting plate, the both ends of connecting plate are fixed with left sleeve and right sleeve respectively, left sleeve plug bush is in outside the left pressure stick, right sleeve plug bush is in outside the right pressure stick.
As the optimization of the technical scheme, the front end of the frame is provided with the diversion trench corresponding to the two magnetic sockets on the transverse plate, the side wall of the diversion trench is connected with the electromagnetic push rod, and the electromagnetic push rod is fixedly arranged on the frame.
As an optimization of the above technical scheme, a host circuit board, a slave circuit board, a power supply and a forward motor driver are arranged in the distribution box, a left stepping motor driver, a middle stepping motor driver and a right stepping motor driver are arranged on the host circuit board, a slave control unit and a second signal processing module are arranged on the slave circuit board, and the host control unit is respectively and electrically connected with the slave control unit, the first signal processing module, the power supply, the forward motor driver, the left stepping motor driver, the forward position sensor, the left upper position sensor and the left lower position sensor, and the slave control unit is respectively and electrically connected with the second signal processing module, the power supply, the middle stepping motor driver, the right upper position sensor, the right lower position sensor, the middle upper position sensor and the middle lower position sensor.
As the optimization of the technical scheme, the left sensitive probe and the right sensitive probe are composed of a transmitting coil, a first receiving coil and a second receiving coil, the left sensitive probe is electrically connected with the first signal processing module, the right sensitive probe is electrically connected with the second signal processing module, and the first signal processing module and the second signal processing module are composed of an excitation signal source unit, a differential unit, a true effective value detection unit and an A/D conversion unit.
A control method of a two-way passive hard tag magnetic insertion device comprises the following steps:
s1: the host control unit controls the forward advance motor to work, and conveys the hard magnetic labels to be inserted in the magnetic inserting seat to the position right below the left pressing rod and the right pressing rod until the forward position sensor senses the corresponding forward position sensing piece, and the host control unit controls the forward advance motor to stop working;
s2: the master control unit sends a command of starting the middle stepping motor to the slave control unit, the slave control unit controls the middle stepping motor to work and moves down the left sleeve and the right sleeve fixed on the connecting plate until the middle-lower position sensor senses the middle position sensing piece, and the slave control unit controls the middle stepping motor to stop moving down;
s3: the slave control unit sends a sensitive probe setting command to the master control unit, and simultaneously the slave control unit controls the right stepping motor to work and enters right magnetic rod pressing control;
s4: the host control unit receives a sensitive probe setting command sent by the slave control unit, and controls the left stepping motor to work and enter left magnetic rod pressing control;
s5: after the left Lu Cibang and right magnetic bars are pressed down, the host control unit sends a pressing down end command to the slave control unit, the slave control unit controls the middle stepping motor to work and drives the connecting plate to move upwards until the middle position sensor senses the middle position sensing piece, and the slave control unit controls the middle stepping motor to stop moving upwards;
s6: the slave control unit controls the right stepping motor to work, reversely lifts the right pressing rod until the right upper position sensor senses the right position sensing piece, controls the right stepping motor to stop working, and sends a right lifting stop command to the host control unit;
s7: the host control unit controls the left stepping motor to work, reversely lifts the left pressing rod until the left upper position sensor senses the left position sensing piece, controls the left stepping motor to stop working, and simultaneously receives a right lifting stop command sent by the slave control unit;
s8: step S1 is entered to loop through the control flow.
As an optimization of the above technical solution, the right magnetic rod down-pressure control process in the step S3 and the left magnetic rod down-pressure control process in the step S4 each include an upper limit frequency fast down-pressure step, an upper limit frequency slow down-pressure step, and a quality determination fine adjustment step;
the upper limit frequency rapid pressing step in the left-path magnetic rod pressing control process specifically comprises the following steps:
s31: the host control unit controls the excitation signal source unit to generate an excitation signal with the upper limit frequency of F+delta F, and controls the left stepping motor to operate in a high gear;
s32: the A/D conversion unit acquires in real time, the digital quantity converted by the A/D conversion unit is recorded as Nx, nx is compared with a set threshold value Nn, if Nx is larger than Nn, the left stepping motor is stopped, and the step S33 is started; otherwise, the left stepping motor continues to work until the left lower position sensor senses the left position sensing piece, the passive hard tag product is marked as unqualified, and the step S39 is carried out;
the upper limit frequency slow-down step in the left-path magnetic rod down-pressure control process specifically comprises the following steps:
s33: the host control unit controls the left stepping motor to run in a slow gear;
s34: setting the initial value of one variable max_temp as Nn and the initial value of the other variable count as 0;
s35: comparing the converted digital quantity Nx of the A/D conversion unit with the max_temp, if Nx is larger than the max_temp, assigning Nx to the max_temp, and clearing count; if Nx is less than or equal to max_temp, count is added with 1;
s36: judging whether the count is greater than 2, if so, stopping the left stepping motor, and entering step S37;
the quality judgment fine adjustment step in the left magnetic rod downward pressure control process specifically comprises the following steps:
s37: the host control unit controls the excitation signal source unit to sequentially generate excitation signals with the frequency of F, F +delta f, the A/D conversion unit collects the excitation signals in real time, and the digital quantity conversion results of the A/D conversion unit are respectively recorded as N F 、N F+Δf ；
S38: will N F And N F+Δf Comparing if N F+Δf ＞N F The host control unit starts a left stepping motor to work, and the left stepping motor drives a left pressing rod to press a small distance downwards and then enters step S37; if N F+Δf ≤N F And proceeds to step S39;
s39: and the host control unit controls the left stepping motor to stop working, and the left magnetic rod is pressed down.
The invention has the beneficial effects that: the device has simple structure and stable operation; the adopted double-path piezomagnetic design fully exerts the manual feeding speed and improves the production efficiency; the designed double-path down-pressure control flow and method can effectively control the insertion depth of the magnetic rod and ensure the accuracy of the resonant frequency of the hard tag; in addition, the device also has a sorting function on defective passive hard tags, and the device and the control method thereof provide technical support for full-automatic production of the hard tags.
Description of the drawings:
the following drawings are only for purposes of illustration and explanation of the present invention and are not intended to limit the scope of the invention. Wherein:
FIG. 1 is a first schematic diagram of a dual-path passive hard tag magnetic insertion device according to one embodiment of the present invention;
FIG. 2 is a second schematic diagram of a dual-path passive hard tag magnetic insertion device according to one embodiment of the present invention;
FIG. 3 is a schematic diagram of a stepping motor on a supporting frame according to an embodiment of the present invention;
FIG. 4 is a schematic view showing an internal structure of a power distribution box according to an embodiment of the present invention;
FIG. 5 is a flow chart of the control of the master control unit and the slave control unit in the control method of the dual-path passive hard tag magnetic inserting device according to one embodiment of the present invention;
FIG. 6 is a flowchart of a fast upper limit frequency down-pressing step according to an embodiment of the present invention.
The symbols in the drawings illustrate:
the device comprises a 1-rack, a 2-supporting frame, a 3-distribution box, a 4-forward advancing motor, a 5-worm gear reducer, a 6-rotating rod, a 7-bearing seat, an 8-synchronous roller, a 9-synchronous belt, a 10-transverse plate, an 11-magnet inserting seat, a 12-forward position sensing piece, a 13-forward position sensor, a 14-left stepping motor, a 15-middle stepping motor, a 16-right stepping motor, a 17-left lead screw, a 18-left moving block, a 19-left pressure rod, a 20-left position sensing piece, a 21-left upper position sensor, a 22-left lower position sensor, a 23-right lead screw, a 24-right moving block, a 25-right pressure rod, a 26-right position sensing piece, a 27-right upper position sensor, a 28-right lower position sensor, a 29-middle lead screw, a 30-middle moving block, a 31-middle position sensing piece, a 32-middle upper position sensor, a 33-middle lower position sensor, a 34-connecting plate, a 35-left sleeve, a 36-right sleeve, a 37-left guide groove, a 38-right guide groove and a 40-push rod.
The specific embodiment is as follows:
as shown in fig. 1 and 2, a two-way passive hard tag magnetic insertion device of the present invention includes:
the device comprises a frame 1, wherein a supporting frame 2 is arranged on the upper surface of the frame 1, a distribution box 3 is arranged on one side wall of the frame 1, a forward advancing motor 4 is arranged on the other side wall of the frame 1, the forward advancing motor 4 is connected with a worm gear reducer 5, the worm gear reducer 5 is connected with a first end of a rotating rod 6, a second end of the rotating rod 6 is inserted into a bearing seat 7, the bearing seat 7 is fixedly arranged on the frame 1, a synchronous roller 8 is inserted into the rotating rod 6, a synchronous belt 9 is arranged on the synchronous roller 8, a plurality of transverse plates 10 are arranged on the synchronous belt 9 at intervals, two magnetic inserting seats 11 are arranged on the transverse plates 10 in parallel, a forward position sensing piece 12 is arranged on the upper surface of the transverse plates 10, and a forward position sensor 13 corresponding to the forward position sensing piece 12 is arranged on the frame 1;
the support frame 2 is provided with a left stepping motor 14, a middle stepping motor 15 and a right stepping motor 16, a left pressing rod 19 is arranged below the left stepping motor 14, a left sleeve 35 is sleeved outside the left pressing rod 19, a left sensitive probe 37 is arranged on the outer side wall of the lower end of the left sleeve 35, a right pressing rod 25 is arranged below the right stepping motor 14, a right sleeve 36 is sleeved outside the right pressing rod 25, and a right sensitive probe 38 is arranged on the outer side wall of the lower end of the right sleeve 36.
The output shaft of left stepping motor 14 is connected with left lead screw 17 through the shaft coupling, the spiro union has left movable block 18 on the left lead screw 17, the front end of left movable block 18 is fixed to be provided with cylindrical left press stick 19, the lateral wall of left movable block 18 is provided with left position sensing piece 20, be provided with on the support frame 2 with left upper position sensor 21 and left lower position sensor 22 that left position sensing piece 20 corresponds.
The output shaft of right stepper motor 16 is connected with right lead screw 23 through the shaft coupling, the spiro union has right movable block 24 on the right lead screw 23, the front end of right movable block 24 is fixed to be provided with cylindrical right press stick 25, the lateral wall of right movable block 24 is provided with right position sensing piece 26, be provided with on the support frame 2 with right upper position sensor 27 and right lower position sensor 28 that right position sensing piece 26 corresponds.
The output shaft of the middle stepping motor 15 is connected with a middle lead screw 29 through a coupling, a middle moving block 30 is connected to the middle lead screw 29 in a threaded manner, a middle position sensing piece 31 is arranged on the side wall of the middle moving block 30, a middle upper position sensor 32 and a middle lower position sensor 33 corresponding to the middle position sensing piece 31 are arranged on the supporting frame 2, a horizontal connecting plate 34 is fixedly arranged at the front end of the middle moving block 30, a left sleeve 35 and a right sleeve 36 are respectively fixed at two ends of the connecting plate 34, the left sleeve 35 is sleeved outside the left pressing rod 19 in a sleeved manner, and the right sleeve 36 is sleeved outside the right pressing rod 25 in a sleeved manner.
The front end of the frame 1 is provided with a diversion trench 39 corresponding to the two magnetic sockets 11 on the transverse plate 10, the side wall of the diversion trench 39 is connected with an electromagnetic push rod 40, and the electromagnetic push rod 40 is fixedly arranged on the frame 1.
The power distribution box 3 is internally provided with a host circuit board, a slave circuit board, a power supply and a forward motor driver, the left stepping motor driver, the middle stepping motor driver and the right stepping motor driver are arranged on the host circuit board, the slave circuit board is provided with a slave control unit and a second signal processing module, the host control unit is respectively electrically connected with the slave control unit, the first signal processing module, the power supply, the forward motor driver, the left stepping motor driver, the forward position sensor 13, the left upper position sensor 21 and the left lower position sensor 22, and the slave control unit is respectively electrically connected with the second signal processing module, the power supply, the middle stepping motor driver, the right upper position sensor 27, the right lower position sensor 28, the upper position sensor 32 and the middle lower position sensor 33. The left sensitive probe 37 and the right sensitive probe 38 are composed of a transmitting coil, a first receiving coil and a second receiving coil, the left sensitive probe 37 and the first signal processing module are electrically connected, the right sensitive probe 38 and the second signal processing module are electrically connected, and the first signal processing module and the second signal processing module are composed of an excitation signal source unit, a differential unit, a true effective value detection unit and an A/D conversion unit.
The control method of the two-way passive hard tag magnetic inserting device in the embodiment specifically comprises the following steps:
s1: the host control unit controls the advancing motor 4 to work and conveys the hard magnetic labels to be inserted in the magnetic inserting seat 11 to the position right below the left pressing rod 19 and the right pressing rod 25 until the advancing position sensor 13 senses the corresponding advancing position sensing piece 12, and the host control unit controls the advancing motor 4 to stop working;
s2: the master control unit sends a starting stepping motor command to the slave control unit, the slave control unit controls the working of the stepping motor 15 and moves down the left sleeve 35 and the right sleeve 36 fixed on the connecting plate 34 until the middle-lower position sensor 33 senses the middle position sensing piece 31, and the slave control unit controls the middle stepping motor 15 to stop moving down;
s3: the slave control unit sends a sensitive probe setting command to the master control unit, and simultaneously the slave control unit controls the right stepping motor 16 to work and enters right magnetic rod pressing control;
s4: the host control unit receives a sensitive probe setting command sent by the slave control unit, and controls the left stepping motor 14 to work and enter left magnetic rod pressing control;
s5: after the left Lu Cibang and right magnetic bars are pressed down, the host control unit sends a pressing down end command to the slave control unit, the slave control unit controls the middle stepping motor 15 to work and drives the connecting plate 34 to move upwards until the middle position sensor 32 senses the middle position sensing piece 31, and the slave control unit controls the middle stepping motor 15 to stop moving upwards;
s6: the slave control unit controls the right stepping motor 16 to work, reversely lifts the right pressing rod 25 until the right upper position sensor 28 senses the right position sensing piece 26, controls the right stepping motor 16 to stop working, and sends a right lifting stop command to the host control unit;
s7: the host control unit controls the left stepping motor 14 to work, reversely lifts the left pressing rod 19 until the left upper position sensor 21 senses the left position sensing piece 20, and controls the left stepping motor 14 to stop working, and meanwhile, the host control unit receives a right lifting stop command sent by the slave control unit;
s8: step S1 is entered to loop through the control flow.
The right magnetic rod downward pressure control process in the step S3 and the left magnetic rod downward pressure control process in the step S4 both comprise an upper limit frequency rapid downward pressure step, an upper limit frequency slow downward pressure step and a quality judgment fine adjustment step.
The upper limit frequency rapid pressing step in the left-path magnetic rod pressing control process specifically comprises the following steps:
s31: the host control unit controls the excitation signal source unit to generate an excitation signal with the upper limit frequency of F+delta F, and controls the left stepping motor to operate in a high gear;
s32: the A/D conversion unit acquires in real time, the digital quantity converted by the A/D conversion unit is recorded as Nx, nx is compared with a set threshold value Nn, if Nx is larger than Nn, the left stepping motor is stopped, and the step S33 is started; otherwise, the left stepping motor continues to work until the left lower position sensor senses the left position sensing piece, the passive hard tag product is marked as unqualified, and the step S39 is carried out;
the upper limit frequency slow-down step in the left-path magnetic rod down-pressure control process specifically comprises the following steps:
s33: the host control unit controls the left stepping motor to run in a slow gear;
s34: setting the initial value of one variable max_temp as Nn and the initial value of the other variable count as 0;
s35: comparing the converted digital quantity Nx of the A/D conversion unit with the max_temp, if Nx is larger than the max_temp, assigning Nx to the max_temp, and clearing count; if Nx is less than or equal to max_temp, count is added with 1;
s36: judging whether the count is greater than 2, if so, stopping the left stepping motor, and entering step S37;
the quality judgment fine adjustment step in the left magnetic rod downward pressure control process specifically comprises the following steps:
s37: the host control unit controls the excitation signal source unit to sequentially generate excitation signals with the frequency of F, F +delta f, the A/D conversion unit collects the excitation signals in real time, and the digital quantity conversion results of the A/D conversion unit are respectively recorded as N F 、N F+Δf ；
S38: will N F And N F+Δf Comparing if N F+Δf ＞N F The host control unit starts a left stepping motor to work, and the left stepping motor drives a left pressing rod to press a small distance downwards and then enters step S37; if N F+Δf ≤N F And proceeds to step S39;
s39: and the host control unit controls the left stepping motor to stop working, and the left magnetic rod is pressed down.
After the magnetic bar of the magnetic label to be inserted in the magnetic inserting seat 11 is inserted, the synchronous belt 9 drives the transverse plate 10 to operate, and the qualified passive hard label enters the qualified product storage box and other devices along the diversion trench 39. The passive hard tag marked as unqualified is operated, and the electromagnetic push rod 40 moves the diversion trench 39 aside, and the passive hard tag marked as unqualified is directly dropped into the unqualified product storage box.
The device specifically comprises a rack, a support frame, a distribution box, an advancing motor, a worm gear reducer, a synchronous belt, a transverse plate, a magnet inserting seat, an advancing position sensing piece, an advancing position sensor, a left stepping motor, a middle stepping motor, a right stepping motor, a left pressing rod, a left sleeve, a left sensitive probe, a right pressing rod, a right sleeve, a right sensitive probe and the like. The device has simple structure and stable operation; the adopted double-path piezomagnetic design fully exerts the manual feeding speed and improves the production efficiency; the designed double-path down-pressure control flow and method can effectively control the insertion depth of the magnetic rod and ensure the accuracy of the resonant frequency of the hard tag; in addition, the device also has a sorting function on defective passive hard tags, and the device and the control method thereof provide technical support for full-automatic production of the hard tags.
It is apparent that the above examples are given by way of illustration only and are not limiting of the embodiments. Other variations or modifications of the above teachings will be apparent to those of ordinary skill in the art. It is not necessary here nor is it exhaustive of all embodiments. While still being apparent from variations or modifications that may be made by those skilled in the art are within the scope of the invention.
Claims (3)
1. A two-way passive hard tag magnetic device, comprising:
the lifting device comprises a rack (1), wherein a supporting frame (2) is arranged on the upper surface of the rack (1), a distribution box (3) is arranged on one side wall of the rack (1), a forward advancing motor (4) is arranged on the other side wall of the rack (1), the forward advancing motor (4) is connected with a worm gear reducer (5), the worm gear reducer (5) is connected with a first end of a rotating rod (6), a second end of the rotating rod (6) is inserted into a bearing seat (7), the bearing seat (7) is fixedly arranged on the rack (1), a synchronous roller (8) is sleeved on the rotating rod (6), a synchronous belt (9) is arranged on the synchronous roller (8), a plurality of transverse plates (10) are arranged on the synchronous belt (9) at intervals, two magnetic inserting seats (11) are arranged on the transverse plates (10) in parallel, a forward position sensing piece (12) is arranged on the upper surface of each transverse plate (10), and a forward position sensor (13) corresponding to the forward position sensing piece (12) is arranged on the rack (1).
The automatic control device is characterized in that a left stepping motor (14), a middle stepping motor (15) and a right stepping motor (16) are arranged on the supporting frame (2), a left pressing rod (19) is arranged below the left stepping motor (14), a left sleeve (35) is externally sleeved on the left pressing rod (19), a left sensitive probe (37) is arranged on the outer side wall of the lower end of the left sleeve (35), a right pressing rod (25) is arranged below the right stepping motor (14), a right sleeve (36) is externally sleeved on the right pressing rod (25), and a right sensitive probe (38) is arranged on the outer side wall of the lower end of the right sleeve (36);
an output shaft of the left stepping motor (14) is connected with a left lead screw (17) through a coupler, a left moving block (18) is connected to the left lead screw (17) in a threaded mode, a cylindrical left pressing rod (19) is fixedly arranged at the front end of the left moving block (18), a left position sensing piece (20) is arranged on the side wall of the left moving block (18), and a left upper position sensor (21) and a left lower position sensor (22) which correspond to the left position sensing piece (20) are arranged on the supporting frame (2);
an output shaft of the right stepping motor (16) is connected with a right lead screw (23) through a coupler, a right moving block (24) is connected to the right lead screw (23) in a screwed mode, a cylindrical right pressing rod (25) is fixedly arranged at the front end of the right moving block (24), a right position sensing piece (26) is arranged on the side wall of the right moving block (24), and a right upper position sensor (27) and a right lower position sensor (28) which correspond to the right position sensing piece (26) are arranged on the supporting frame (2);
an output shaft of the middle stepping motor (15) is connected with a middle lead screw (29) through a coupler, a middle moving block (30) is connected to the middle lead screw (29) in a threaded manner, a middle position sensing piece (31) is arranged on the side wall of the middle moving block (30), a middle upper position sensor (32) and a middle lower position sensor (33) which correspond to the middle position sensing piece (31) are arranged on the supporting frame (2), a horizontal connecting plate (34) is fixedly arranged at the front end of the middle moving block (30), a left sleeve (35) and a right sleeve (36) are respectively fixed at two ends of the connecting plate (34), the left sleeve (35) is sleeved outside the left pressing rod (19), and the right sleeve (36) is sleeved outside the right pressing rod (25);
the front end of the frame (1) is provided with a diversion trench (39) corresponding to the two magnetic sockets (11) on the transverse plate (10), the side wall of the diversion trench (39) is connected with an electromagnetic push rod (40), and the electromagnetic push rod (40) is fixedly arranged on the frame (1);
a host circuit board, a slave circuit board, a power supply and a forward advancing motor driver are arranged in the distribution box (3), a left stepping motor driver, a middle stepping motor driver and a right stepping motor driver are arranged on the host circuit board, a slave control unit and a first signal processing module are arranged on the slave circuit board, the host control unit is respectively and electrically connected with the slave control unit, the first signal processing module, the power supply, the forward advancing motor driver, the left stepping motor driver, the forward advancing position sensor (13), the left upper position sensor (21) and the left lower position sensor (22), and the slave control unit is respectively and electrically connected with the second signal processing module, the power supply, the middle stepping motor driver, the right upper position sensor (27), the right lower position sensor (28), the upper position sensor (32) and the lower middle position sensor (33);
the left sensitive probe (37) and the right sensitive probe (38) are composed of a transmitting coil, a first receiving coil and a second receiving coil, the left sensitive probe (37) is electrically connected with the first signal processing module, the right sensitive probe (38) is electrically connected with the second signal processing module, and the first signal processing module and the second signal processing module are composed of an excitation signal source unit, a differential unit, a true effective value detection unit and an A/D conversion unit.
2. A method of controlling a two-way passive hard tag magnetic device according to claim 1, comprising the steps of:
s1: the host control unit controls the advancing motor (4) to work, and conveys the hard magnetic labels to be inserted in the magnetic inserting seat (11) to the position right below the left pressing rod (19) and the right pressing rod (25) until the advancing position sensor (13) senses the corresponding advancing position sensing piece (12), and the host control unit controls the advancing motor (4) to stop working;
s2: the master control unit sends a step motor command in starting to the slave control unit, the slave control unit controls the step motor (15) to work and moves down the left sleeve (35) and the right sleeve (36) fixed on the connecting plate (34) until the middle-lower position sensor (33) senses the middle position sensing piece (31), and the slave control unit controls the step motor (15) to stop moving down;
s3: the slave control unit sends a sensitive probe setting command to the master control unit, and simultaneously the slave control unit controls the right stepping motor (16) to work and enters right magnetic rod pressing control;
s4: the host control unit receives a sensitive probe setting command sent by the slave control unit, and controls the left stepping motor (14) to work and enter left magnetic rod pressing control;
s5: after the left Lu Cibang and right magnetic bars are pressed down, the host control unit sends a pressing down end command to the slave control unit, the slave control unit controls the middle stepping motor (15) to work and drives the connecting plate (34) to move upwards until the middle-upper position sensor (32) senses the middle position sensing piece (31), and the slave control unit controls the middle stepping motor (15) to stop moving upwards;
s6: the slave control unit controls the right stepping motor (16) to work, reversely lifts the right pressing rod (25) until the right upper position sensor (28) senses the right position sensing piece (26), controls the right stepping motor (16) to stop working, and sends a right lifting stop command to the host control unit;
s7: the host control unit controls the left stepping motor (14) to work, reversely lifts the left pressing rod (19) until the left upper position sensor (21) senses the left position sensing piece (20), and controls the left stepping motor (14) to stop working, and meanwhile, the host control unit receives a right lifting stop command sent by the slave control unit;
s8: step S1 is entered to loop through the control flow.
3. The control method of the two-way passive hard tag magnetic inserting device according to claim 2, wherein: the right magnetic rod downward pressure control process in the step S3 and the left magnetic rod downward pressure control process in the step S4 both comprise an upper limit frequency rapid downward pressure step, an upper limit frequency slow downward pressure step and a quality judgment fine adjustment step;
the upper limit frequency rapid pressing step in the left-path magnetic rod pressing control process specifically comprises the following steps:
s31: the host control unit controls the excitation signal source unit to generate an excitation signal with the upper limit frequency of F+delta F, and controls the left stepping motor to operate in a high gear;
s32: the A/D conversion unit acquires in real time, the digital quantity converted by the A/D conversion unit is recorded as Nx, nx is compared with a set threshold value Nn, if Nx is larger than Nn, the left stepping motor is stopped, and the step S33 is started; otherwise, the left stepping motor continues to work until the left lower position sensor senses the left position sensing piece, the passive hard tag product is marked as unqualified, and the step S39 is carried out;
the upper limit frequency slow-down step in the left-path magnetic rod down-pressure control process specifically comprises the following steps:
s33: the host control unit controls the left stepping motor to run in a slow gear;
s34: setting the initial value of one variable max_temp as Nn and the initial value of the other variable count as 0;
s35: comparing the converted digital quantity Nx of the A/D conversion unit with the max_temp, if Nx is larger than the max_temp, assigning Nx to the max_temp, and clearing count; if Nx is less than or equal to max_temp, count is added with 1;
s36: judging whether the count is greater than 2, if so, stopping the left stepping motor, and entering step S37;
the quality judgment fine adjustment step in the left magnetic rod downward pressure control process specifically comprises the following steps:
s37: the host control unit controls the excitation signal source unit to sequentially generate excitation signals with the frequency of F, F +delta f, the A/D conversion unit collects the excitation signals in real time, and the digital quantity conversion results of the A/D conversion unit are respectively recorded as N F 、N F+Δf ；
S38: will N F And N F+Δf Comparing if N F+Δf ＞N F The host control unit starts a left stepping motor to work, and the left stepping motor drives a left pressing rod to press a small distance downwards and then enters step S37; if N F+Δf ≤N F And proceeds to step S39;
s39: and the host control unit controls the left stepping motor to stop working, and the left magnetic rod is pressed down.
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| CN201810216596.7A CN108268929B (en) | 2018-03-16 | 2018-03-16 | Double-path passive hard tag magnetic inserting device and control method thereof |
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| CN201810216596.7A CN108268929B (en) | 2018-03-16 | 2018-03-16 | Double-path passive hard tag magnetic inserting device and control method thereof |
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