CN114824060A - Intelligent polarization system and method for piezoelectric composite material - Google Patents
Intelligent polarization system and method for piezoelectric composite material Download PDFInfo
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- CN114824060A CN114824060A CN202110674777.6A CN202110674777A CN114824060A CN 114824060 A CN114824060 A CN 114824060A CN 202110674777 A CN202110674777 A CN 202110674777A CN 114824060 A CN114824060 A CN 114824060A
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- H10N30/00—Piezoelectric or electrostrictive devices
- H10N30/01—Manufacture or treatment
- H10N30/04—Treatments to modify a piezoelectric or electrostrictive property, e.g. polarisation characteristics, vibration characteristics or mode tuning
- H10N30/045—Treatments to modify a piezoelectric or electrostrictive property, e.g. polarisation characteristics, vibration characteristics or mode tuning by polarising
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- H01L22/00—Testing or measuring during manufacture or treatment; Reliability measurements, i.e. testing of parts without further processing to modify the parts as such; Structural arrangements therefor
- H01L22/10—Measuring as part of the manufacturing process
- H01L22/12—Measuring as part of the manufacturing process for structural parameters, e.g. thickness, line width, refractive index, temperature, warp, bond strength, defects, optical inspection, electrical measurement of structural dimensions, metallurgic measurement of diffusions
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- H—ELECTRICITY
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- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L22/00—Testing or measuring during manufacture or treatment; Reliability measurements, i.e. testing of parts without further processing to modify the parts as such; Structural arrangements therefor
- H01L22/10—Measuring as part of the manufacturing process
- H01L22/14—Measuring as part of the manufacturing process for electrical parameters, e.g. resistance, deep-levels, CV, diffusions by electrical means
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L22/00—Testing or measuring during manufacture or treatment; Reliability measurements, i.e. testing of parts without further processing to modify the parts as such; Structural arrangements therefor
- H01L22/20—Sequence of activities consisting of a plurality of measurements, corrections, marking or sorting steps
- H01L22/26—Acting in response to an ongoing measurement without interruption of processing, e.g. endpoint detection, in-situ thickness measurement
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Abstract
The utility model provides a piezoelectricity combined material intelligence polarization device which characterized in that: comprises a polarization device and a detection device; the polarization device comprises a bottom plate unit, a cover plate unit and a pressing block, wherein the bottom plate unit comprises a printed circuit board, a conductive rubber strip and a conductive rubber strip fixing structure; the cover plate unit comprises a cover plate, a spiral fine adjustment unit, a vacuum pumping unit, a resistance type heating film and a film temperature sensor; the detection device comprises a microprocessor, a signal amplification unit, a thyristor switching unit, a high-voltage amplification unit, a collecting clamping groove and a digital display screen. The invention has simple structure and high assembly precision, can be suitable for polarizing piezoelectric composite materials with different sizes, and can finish the assembly of the piezoelectric composite materials and the intelligent detection of the polarization condition, thereby leading the polarization process to be more intelligent and digital.
Description
Technical Field
The invention relates to the field of piezoelectric composite material preparation, in particular to an intelligent polarization system and method for a piezoelectric composite material under ultrahigh pressure.
Background
Piezoelectric ceramics is a typical piezoelectric material, and can sense the outside world through the piezoelectric effectA stress field. In addition, the inverse piezoelectric effect enables the material to be used as an actuator, and the material is one of the most widely used intelligent materials because the deformation amount and the driving force generated under an applied electric field are large, and a control signal in an electric form is easy to control. However, with the further expansion of the application range of the intelligent material and the complication of the application environment, the traditional piezoelectric ceramic material has the characteristics of large brittleness, large impedance, narrow bandwidth and the like, and is poor in compatibility with the body material, so that the problems of damage, fracture and the like are easily caused at the interface, and the use scene of the piezoelectric ceramic material is limited. The piezoelectric composite material is a multi-phase composite material with piezoelectric effect formed by compounding a piezoelectric phase material (such as piezoelectric ceramic) and a non-piezoelectric material phase (such as polymer) according to a certain communication mode, has excellent piezoelectric property, good flexibility and strong designability, and can make up for the defects of the traditional piezoelectric ceramic material. Compared with the polarization of the traditional piezoelectric ceramics, the piezoelectric composite material has a multi-section slender structure, and the original polarization technology and scheme can not meet the polarization requirement of the piezoelectric composite material. Piezoelectric constant d 33 The piezoelectric material is one of important characteristic parameters, and is a proportionality constant of a piezoelectric medium for converting mechanical energy (or electric energy) into electric energy (or mechanical energy), reflects the relation between stress or strain and an electric field or electric displacement, and directly reflects the coupling relation of electromechanical properties of the material and the strength of a piezoelectric effect.
The patent publication No. CN107026232A discloses a piezoelectric fiber polarization device and method, which comprises a polarization device, a polarization cell and a control unit, is suitable for direct polarization of long and thin piezoelectric fibers, is not suitable for polarization of piezoelectric composite materials, and needs to be placed in the polarization cell to be polarized by adding insulating liquid such as silicone oil. The patent publication No. CN102610741A discloses a piezoelectric material polarization device and method, which includes a polarization host, a polarization oil tank, and a polarization fixture for holding a polarization test piece, the device and method are only suitable for polarization of general piezoelectric materials, and are not suitable for polarization of 1-3 type thin sheet type piezoelectric composite materials, and the specific design scheme of the fixture is not disclosed.
Disclosure of Invention
The utility model provides a piezoelectricity combined material intelligence polarization device which characterized in that: comprises a polarization device and a detection device; the polarization device comprises a bottom plate unit, a cover plate unit and a pressing block, wherein the bottom plate unit comprises a printed circuit board, a conductive rubber strip and a conductive rubber strip fixing structure; the cover plate unit comprises a cover plate, a spiral fine adjustment unit, a vacuum pumping unit, a resistance type heating film and a film temperature sensor; the detection device comprises a microprocessor, a signal amplification unit, a thyristor switching unit, a high-voltage amplification unit, a collecting clamping groove and a digital display screen.
Preferably, in the above piezoelectric composite material intelligent polarization device, four sliding grooves are formed on the printed circuit board, and corresponding screw holes are formed on the conductive rubber strip fixing grooves and are positioned and fixed by fastening screws; the conductive rubber strip is arranged in the conductive rubber sleeve fixing groove; one side of the sliding groove is marked with scales, so that the positioning of the conductive rubber strip fixing groove is more accurate.
Preferably, in the above piezoelectric composite material intelligent polarization device, the front surface of the printed circuit board is plated with interdigital electrodes, the printed circuit board is divided into two areas by the central axis of the printed circuit board, the interdigital electrodes are symmetrically arranged, all positive electrodes of the area a1 are led to one side of the printed circuit board, and marked with "+" poles, all negative electrodes of the area a2 are led to one side of the printed circuit board, and marked with "-" poles, so as to form a terminal of the printed circuit board.
Preferably, in the above piezoelectric composite material intelligent polarization device, the spiral fine tuning unit is bonded on the front surface of the cover plate, copper is plated around the four positioning pin holes of the cover plate, copper is also plated around the four positioning pin holes of the printed circuit board, and the film temperature sensor and the resistance type heating film are conducted to the temperature measuring electrode and the heating electrode of the printed circuit board through the copper plated area electrodes and the red copper springs around the four positioning pins on the cover plate.
Preferably, in the above piezoelectric composite material intelligent polarization device, the conductive rubber strip is formed by alternately layering and overlapping equal-sized conductive rubber and insulating rubber and then vulcanizing, wherein graphite particles with a particle size of 5000 meshes or more are selected as conductive particles in the conductive rubber; the thickness of the single-layer conductive rubber in the stacking direction is required to meet the following requirements: the ratio of the polarization voltage to the thickness of the single-layer conductive rubber in the stacking direction is not more than 20; the surface width of the piezoelectric composite material intermediate electrode in the polarization direction is the same as the thickness of the single-layer conductive rubber in the superposition direction; and the ratio of the width of the single interdigital electrode on the upper surface of the printed circuit board in the polarization direction to the thickness of the single conductive rubber in the stacking direction is not less than 3 and is in integral multiple.
Preferably, in the above piezoelectric composite material intelligent polarization device, the cover plate is of a shell structure and made of an acrylic plate, a plurality of air holes are reserved on the front surface, an air valve is reserved on the side surface, and the vacuum pumping unit is connected with the air valve; a film temperature sensor is pasted on the front surface of the cover plate, and a resistance type heating film is pasted on the film temperature sensor; the resistance heating film is provided with a plurality of air holes which are communicated with the air holes of the cover plate.
Preferably, in the above piezoelectric composite material intelligent polarization device, the thin film temperature sensor in the detection device is arranged on the cover plate, the signal amplification unit and the high voltage amplification unit are respectively connected with the thyristor switching unit, and the thyristor switching unit and the thin film temperature sensor are connected with the microprocessor.
Preferably, in the above piezoelectric composite intelligent polarization device, the piezoelectric composite polarization method of the piezoelectric composite intelligent polarization device includes the following steps.
1) Assembling: measuring the size of the piezoelectric composite material, symmetrically adjusting the conductive rubber strip fixing grooves to keep the width of the conductive rubber strip fixing grooves consistent with that of the piezoelectric composite material, then installing the conductive rubber strip on the printed circuit board in parallel through bolts, and placing the conductive rubber strip in the conductive rubber strip fixing grooves; cutting a piece into a proper size, adhering a mask with a proper size on the front surface of the cover plate, blocking air holes exceeding the size range of the piezoelectric material, adhering a film temperature sensor on the front surface of the cover plate, adhering a resistance type heating film on the film temperature sensor, and placing the piezoelectric composite material on the cover plate to be in contact with the resistance type heating film; adjusting the screw fine-tuning unit to pre-tighten the piezoelectric composite material, starting air exhaust from the valve connected with the cover plate by the vacuum air exhaust unit to enable the valve to be in a negative pressure state, adjusting the screw fine-tuning unit again to perform fine tuning, connecting the cover plate and the bottom plate through a threaded positioning pin and a red copper spring, sleeving the positioning pin with the red copper spring, placing the pressing block on the cover plate to be pressed tightly, and adjusting the screw fine-tuning unit to perform fine tuning to enable the pressing block to be in close contact with the side face of the piezoelectric composite material.
2) Checking the negative electrode connection: inserting a negative electrode detection finger-type electrode array of the printed circuit board into the acquisition card slot; starting a detection device, controlling the thyristor switching unit to disconnect the connection between the positive electrode and the negative electrode and the high-voltage amplifier, communicating the thyristor switching unit with a detection circuit, firstly detecting whether the positive electrode and the negative electrode of the printed circuit board are in a normal open circuit state or not by the detection circuit, if so, carrying out self-detection on the connection condition of the piezoelectric composite material and the negative electrode part of the interdigital electrode of the printed circuit board in the polarization device by the detection circuit, controlling an IO port by a microprocessor to output a high level to the negative electrode of the interdigital electrode, and then calculating the connection quantity N1 of the negative electrodes in the piezoelectric composite material according to the level condition fed back to the IO port of the microprocessor by a negative electrode detection finger electrode array.
3) Checking positive electrode connection: and starting a detection circuit in the detection device, firstly detecting whether the positive electrode and the negative electrode of the printed circuit board are in a normal open circuit state or not by the detection circuit, if so, carrying out self-detection on the connection condition of the piezoelectric composite material in the polarization device and the positive electrode part of the interdigital electrode of the printed circuit board by the detection circuit, controlling the IO port to output high level to the positive electrode of the interdigital electrode by a microprocessor in the controller, and then, calculating the connection quantity N2 of the positive electrode in the piezoelectric composite material according to the level condition fed back to the IO port of the microprocessor by the positive electrode detection finger electrode array.
4) Determining the connection condition: if the microprocessor in the controller calculates that | N1-N2| is less than or equal to 1, the structure of the piezoelectric composite material is complete and the connection with the polarizing device is normal, otherwise, the structure of the piezoelectric composite material is possible to have defects or the piezoelectric composite material is not completely connected with the polarizing device, and some electrodes are in a suspended state and need to be reassembled.
5) Polarization risk test: after the piezoelectric composite material is determined to be normally connected with the polarization device, the detection device starts a polarization mode, controls the thyristor switching unit to be disconnected with the detection circuit, and respectively communicates the positive electrode and the negative electrode of the piezoelectric composite material with the positive electrode and the negative electrode of the high-voltage amplifier; the microprocessor controls the polarization voltage output IO to output quasi-polarization voltage V0, the quasi-polarization voltage is amplified by a high-voltage amplifier by n times to form polarization voltage NV0, the numerical value of NV0 is related to the length of the piezoelectric composite material, the quasi-polarization voltage NV0= 2.812X (KV) is determined according to the length L (mm) of the piezoelectric composite material, the microprocessor controls the IO port to output 120% NV0 polarization high voltage with 100HZ as a period in 3S, and whether breakdown risk exists is detected.
6) Normal polarization: if the piezoelectric composite polarization device can normally work, the first polarization stage is carried out, the temperature is monitored by the detection device through a closed-loop control mode based on the film temperature sensor, the resistance type heating film is controlled to be heated to the polarization temperature, and the piezoelectric composite polarization is carried out for 8min by the preset polarization voltage NV 0.
7) The polarization is completed;
drawings
For a better description of the invention, reference will now be made briefly to the accompanying drawings.
Fig. 1 is a schematic structural diagram of an intelligent polarization device made of piezoelectric composite materials.
Fig. 2 is a schematic structural diagram of a cover plate of the piezoelectric composite material intelligent polarization device of the invention.
Fig. 3 is a schematic structural diagram a of a cover plate unit of the piezoelectric composite material intelligent polarization device of the present invention.
Fig. 4 is a schematic structural diagram b of a cover plate unit of the piezoelectric composite material intelligent polarization device of the invention.
Fig. 5 is a schematic structural diagram c of the cover plate unit of the piezoelectric composite material intelligent polarization device of the present invention.
Fig. 6 is a schematic structural diagram d of a cover plate unit of the piezoelectric composite material intelligent polarization device of the present invention.
Fig. 7 is a schematic structural diagram a of a base plate unit of the piezoelectric composite material intelligent polarization device of the present invention.
Fig. 8 is a schematic structural diagram b of the base plate unit of the piezoelectric composite material intelligent polarization device of the invention.
Fig. 9 is a schematic structural diagram c of the base plate unit of the piezoelectric composite material intelligent polarization device of the present invention.
Fig. 10 is a schematic structural diagram of a conductive rubber strip of the piezoelectric composite material intelligent polarization device of the invention.
Fig. 11 is a schematic detection diagram of the piezoelectric composite material intelligent polarization device of the invention.
In the figure, 1-a polarization device, 2-a vacuum pumping unit, 3-a detection device, 11-a cover plate unit, 12-a bottom plate unit, 13-a pressing block, 301-an acquisition card slot a, 302-an acquisition card slot b, 303-an acquisition device host, 304-a wiring harness, 305-an acquisition card slot c, 306-a detection device host switch, 307-a digital display screen, 1101-a cover plate positioning pin hole, 1102-a spiral fine adjustment unit, 1103-a cover plate, 1104-an air hole, 1105-an air valve, 1106-a resistance type heating film, 1107-a film temperature sensor, 1108-a piezoelectric composite material, 1109-a temperature measuring electrode a, 1110-a temperature measuring electrode b, 1111-a heating electrode a, 1112-a heating electrode b, 1113-a welding point, 1114-a mask, 1201-alignment pin, 1202-conductive rubber strip fixing groove a, 1203-fastening bolt, 1204-printed circuit board sliding groove a, 1219-temperature measuring electrode a1, 1205-printed circuit board, 1206-conductive rubber strip a, 1207-conductive rubber strip fixing groove b, 1220-heating electrode a1, 1208-polarization voltage negative input terminal, 1209-polarization voltage positive input terminal, 1221-heating electrode b1, 1210-conductive rubber strip b, 1222-temperature measuring electrode b1, 1223-red copper spring, 1211-printed circuit board sliding groove b, 1212-printed circuit board sliding groove c, 1213-printed circuit board a sliding groove d, 1214-positive detecting electrode array, 1215-negative detecting electrode array, 1216-positive finger electrode array, 1217-negative finger electrode array, 1218-fastening nut, 1224-terminal of temperature measuring electrode a1, 1225-terminal of temperature measuring electrode b1, 1226-chute scale, 1227-conductive rubber layer in conductive rubber strip, 1228-insulating rubber layer in conductive rubber strip;
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention more clear and clearer than those of the prior art, the technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the drawings in the embodiments. It should be apparent that the described embodiments are only a few embodiments of the invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments of the present invention without inventive step, shall fall within the scope of protection of the present invention.
The intelligent piezoelectric composite material polarizing device comprises a polarizing device 1 and a detecting device 3, wherein the polarizing device comprises a cover plate unit 11, a bottom plate unit 12 and a pressing block 13, the detecting device 3 consists of a detecting device host 303, an acquisition clamping groove a 301, an acquisition clamping groove b 302 and an acquisition clamping groove c 305, the detecting device host and the clamping grooves are connected through a multi-core shielding wire, and the bottom plate unit 12 comprises a printed circuit board 1205, a conductive rubber strip a1206, a conductive rubber strip b1210, a conductive rubber strip fixing groove a1202, a conductive rubber strip fixing groove b1207, a positioning pin 1201 and a red copper spring 1223; the cover plate unit 11 comprises a cover plate 1103, a spiral micro-motion structure 1102, a positioning pin hole 1101, a film temperature sensor 1107, a resistance heating film 1106, an air hole 1104 and an air valve 1105.
The cover plate 1103 is adhered to the spiral fine adjustment unit 1106 for fine adjustment, and four positioning pin holes 1101 are formed in the cover plate and connected to the printed circuit board 1205 through positioning pins 1201 and red copper springs 1223. The mask 1114 is pasted with the front surface of the cover plate, the piezoelectric composite material 1108 to be polarized is attached to the resistance type heating film 1106, the piezoelectric composite material to be polarized is clamped tightly through 8 spiral fine adjustment units 1106, the resistance type heating film 1106 is connected with 1111-heating electrodes a and 1112-heating electrodes and is conducted to 1220-heating electrodes a1 and 1221-heating electrodes b1 through a red copper spring 1223, the film temperature sensor 1107 is connected with 1109-temperature measuring electrodes a and 1110-temperature measuring electrodes b and is conducted to 1219-temperature measuring electrodes a1 and 1222-temperature measuring electrodes b1 through the red copper spring 1223.
The front surface of the bottom plate 12 unit is divided into two areas by the central axis of the printed circuit board, interdigital electrodes are symmetrically arranged, the left electrode and the right electrode are mutually parallel and staggered, all 1216-positive electrode finger type electrode arrays of the area A1 are led to one side of the printed circuit board, a plus pole is marked to form a 1209-polarization voltage positive electrode input end, all the residual negative electrodes form a 1215-negative electrode detection electrode array and are connected with the acquisition card slot a 301, all 1217-negative electrode finger type electrode arrays of the area A2 are led to one side of the printed circuit board, a minus pole is marked to form a 1208-polarization voltage negative electrode input end, all the residual positive electrodes form a 1214-positive electrode detection electrode array and are connected with the acquisition card slot c 305, four long circular slots are arranged on the two sides of the printed circuit board, the long circular slots 1218 of the printed circuit board are connected with fixing slots for fixing the conductive rubber strip 1202 a and the conductive rubber strip b1207 through bolts 1203 and fastening nuts, a conductive rubber strip a1206 and a conductive rubber strip b1210 are installed in the conductive rubber strip fixing groove.
The polarization method of the piezoelectric composite material comprises the following steps.
1) Assembling: measuring the size of the piezoelectric composite 1108, symmetrically adjusting a conductive rubber strip fixing groove a1202 and a conductive rubber strip fixing groove b1207 to ensure that the widths of the conductive rubber strip fixing groove a1202 and the conductive rubber strip fixing groove b1207 are consistent with the width of the piezoelectric composite 1108, and then parallelly installing the conductive rubber strip a1206 and the conductive rubber strip b1210 on a printed circuit board 1205 through bolts 1203, and respectively placing the conductive rubber strip a1202 and the conductive rubber strip b1207 in the conductive rubber strip fixing groove a1202 and the conductive rubber strip fixing groove b 1207; a mask 1114 with a proper size is pasted on the front surface of the cover plate 1103 to block the air holes 1104 beyond the size range of the piezoelectric material, the film temperature sensor 1107 is pasted on the cover plate 1103, the resistance type heating film 1106 is pasted on the film temperature sensor 1107, and the piezoelectric composite material 1108 is placed on the resistance type heating film 1106 and is in contact with the resistance type heating film 1106; the piezoelectric composite material is fixed by the adjusting screw fine-tuning unit, the air valve connecting the vacuum air pumping unit 2 to the cover plate 1103 starts to pump air to enable the air valve to be in a negative pressure state, the adjusting screw fine-tuning unit 1102 is adjusted again to conduct fine tuning, the cover plate 11 and the bottom plate 12 are connected through the positioning pin 1201 and the red copper spring 1223, the pressing block 13 is placed on the cover plate 11 to be pressed tightly, and the adjusting screw fine-tuning unit 1102 is adjusted to conduct fine tuning to enable the pressing block to be in close contact with the side face of the piezoelectric composite material 1108.
2) Checking the negative electrode connection: inserting 1215-negative detection finger electrode array of the printed circuit board into the acquisition card slot a 301, and 1208-polarization voltage negative end into the acquisition card slot b 302; starting a detection circuit in the detection device 3, controlling the thyristor switching unit to disconnect the positive electrode and the negative electrode from the high-voltage amplifier, communicating the thyristor switching unit with the detection circuit, firstly detecting whether the positive electrode and the negative electrode of the printed circuit board are in a normal open circuit state or not by the detection circuit, if the positive electrode and the negative electrode are in the open circuit state, self-checking the connection condition of the piezoelectric composite material in the polarization device and the interdigital electrode negative electrode part 1217 of the printed circuit board by the detection circuit, controlling the IO port to output high level to the negative electrode of the interdigital electrode by a microprocessor in the detection device, and calculating the connection quantity N1 of the negative electrodes in the piezoelectric composite material according to the level condition fed back to the IO port of the microprocessor by a negative electrode detection array.
3) Checking positive electrode connection: inserting an 1214-positive detection finger-shaped electrode array of the printed circuit board into the acquisition card slot c 305, and inserting a 1209-polarization voltage positive input end into the acquisition card slot b 302; starting a detection circuit in the detection device 3, the detection circuit firstly detects whether the positive and negative electrodes of the printed circuit board are in a normal open circuit state, if so, the detection circuit carries out self-detection on the connection condition of the piezoelectric composite material 1108 in the polarization device and the interdigital electrode positive finger-shaped electrode 1216 of the printed circuit board 1205, a microprocessor in the detection device controls an IO port to output a high level to a polarization voltage positive input end 1209 of the interdigital electrode, and then the level condition fed back to the IO port of the microprocessor through a positive detection electrode array 1214 to calculate the connection quantity N2 of the positive electrodes in the piezoelectric composite material.
4) Determining the connection condition: if the microprocessor in the controller calculates | N1-N2| ≦ 1, it indicates that the piezoelectric composite is complete and is properly connected to the polarizer, otherwise, it indicates that the piezoelectric composite 1118 may have defects in structure or the piezoelectric composite 1108 is not fully connected to the polarizer 1, and some electrodes are in a suspended state and need to be reassembled.
5) Polarization risk test: after the piezoelectric composite 1118 is determined to be normally connected with the polarization device 1, the detection device 3 starts a polarization mode, the controller controls the thyristor switching unit to be disconnected with the detection circuit, and positive and negative electrodes of the piezoelectric composite are respectively communicated with positive and negative electrodes of the high-voltage amplifier; the microprocessor controls the polarization voltage output IO to output quasi-polarization voltage V0, the quasi-polarization voltage is amplified by a high-voltage amplifier by n times to form polarization voltage NV0, the numerical value of NV0 is related to the length of the piezoelectric composite material, the quasi-polarization voltage NV0= 2.812X (KV) is determined according to the length L (mm) of the piezoelectric composite material, the microprocessor controls the IO port to output 120% NV0 polarization high voltage with 100HZ as a period in 3S, and whether breakdown risk exists is detected.
6) Normal polarization: if the piezoelectric composite polarization detection device can normally work, the first polarization stage is carried out, the detection device 3 is connected with 1111-heating electrodes a and 1112-heating electrodes based on a resistance-type heating film 1106, is conducted to 1220-heating electrodes a1 and 1221-heating electrodes b1 through a red copper spring 1223, inserts 1208 polarization voltage cathode input ends and 1209-polarization voltage anode input ends into an acquisition card slot b 302, and controls the resistance-type heating plate to raise the temperature to the polarization temperature in a closed-loop control mode so as to carry out composite polarization on the piezoelectric for 8min by preset polarization voltage NV 0; the thin film thermistor 1107 is connected with the 1109-temperature measuring electrode a and the 1110-temperature measuring electrode b, conducted to the 1219-temperature measuring electrode a1, the 1222-temperature measuring electrode b1, the 1224-temperature measuring electrode a1 terminal and the 1225-temperature measuring electrode b1 terminal through a red copper spring 1223 and inserted into the acquisition card slot b 302, so that polarization temperature monitoring is realized, the temperature of the resistance type heating thin film 1106 is controlled to be raised to the polarization temperature in a closed-loop control mode, and the piezoelectric composite polarization is carried out for 8min by using a preset polarization voltage NV 0.
7) The polarization is completed.
Finally, it should be noted that: the above embodiments are only used for illustrating the technical solution of the present invention, and not for limiting the same; while the invention has been described in detail and with reference to the foregoing embodiments, those skilled in the art will appreciate that: the technical solutions described in the foregoing embodiments may be modified, or some or all of the technical features may be equivalently or similarly replaced, without departing from the scope of the technical solutions of the embodiments of the present invention.
Claims (9)
1. The utility model provides a piezoelectricity combined material intelligence polarization system which characterized in that: comprises a polarization device and a detection device; the polarization device comprises a bottom plate unit, a cover plate unit and a pressing block, wherein the bottom plate unit comprises a printed circuit board, a conductive rubber strip and a conductive rubber strip fixing groove; the cover plate unit comprises a cover plate, a spiral fine adjustment unit, a vacuum pumping unit, a resistance type heating film and a film temperature sensor; the detection device comprises a microprocessor, a signal amplification unit, a high-voltage amplification unit, a thyristor switching unit, a collecting clamping groove and a digital display screen.
2. The piezoelectric composite intelligent polarization device of claim 1, wherein: the printed circuit board is provided with four sliding grooves, scales are marked on one sides of the sliding grooves, and the conductive rubber strip fixing grooves are provided with corresponding screw holes and are positioned and fixed through fastening screws; the conductive rubber strip is arranged in the conductive rubber sleeve fixing groove.
3. The intelligent polarization device of claim 1, wherein the front surface of the printed circuit board is plated with interdigital electrodes, the interdigital electrodes are symmetrically arranged by dividing the central axis of the printed circuit board into two areas, all the positive electrodes of the area a1 are led to one side of the printed circuit board and marked with "+" pole, all the negative electrodes of the area a2 are led to one side of the printed circuit board and marked with "-" pole, and a terminal of the printed circuit board is formed; and the distance between the conductive rubber strip fixing grooves can be adjusted on the sliding groove through the fastening screws.
4. The piezoelectric composite intelligent polarization device of claim 1, wherein: the spiral fine-tuning unit is adhered to the front face of the cover plate, copper is plated around the four positioning pin holes of the cover plate, copper is also plated around the four positioning pin holes of the printed circuit board, and the film temperature sensor and the resistance type heating film are conducted to a temperature measuring electrode and a heating electrode of the printed circuit board through copper-plated area electrodes and red copper springs around the four positioning pins on the cover plate.
5. The piezoelectric composite intelligent polarization device of claim 1, wherein: the conductive rubber strip is formed by alternately layering and overlapping conductive rubber and insulating rubber with equal sizes and then vulcanizing, wherein graphite particles with the particle size of 5000 meshes or more are selected as conductive particles in the conductive rubber; the thickness of the single-layer conductive rubber in the stacking direction is required to meet the following requirements: the ratio of the polarization voltage to the thickness of the single-layer conductive rubber in the stacking direction is not more than 20; the surface width of the piezoelectric composite material intermediate electrode in the polarization direction is the same as the thickness of the single-layer conductive rubber in the superposition direction; and the ratio of the width of the single interdigital electrode on the upper surface of the printed circuit board in the polarization direction to the thickness of the single conductive rubber in the stacking direction is not less than 3 and is in integral multiple.
6. The piezoelectric composite intelligent polarization device of claim 4, wherein: the cover plate is of a shell structure and made of an acrylic plate, a plurality of air holes are reserved on the front surface of the cover plate, an air valve is reserved on the side surface of the cover plate, and the vacuum air exhaust unit is connected with the air valve; a mask is pasted on the cover plate, air holes exceeding the size range of the piezoelectric material are blocked, a film temperature sensor is pasted on the cover plate, and a resistance type heating film is pasted on the film temperature sensor; the resistance heating film and the film temperature sensor are provided with a plurality of air holes which are communicated with the air holes of the cover plate.
7. The piezoelectric composite intelligent polarization device of claim 5, wherein: the temperature sensing unit, namely the film temperature sensor, in the detection device is arranged on the cover plate, the signal amplification unit and the high-voltage amplification unit are respectively connected with the thyristor switching unit, and the thyristor switching unit and the film temperature sensor are connected with the microprocessor.
8. The piezoelectric composite intelligent polarization device of claim 1, wherein: the acquisition clamping groove is connected with the bottom plate detection array electrode when the connection state of the electrodes is detected.
9. The piezoelectric composite polarization method of the piezoelectric composite intelligent polarization system of any one of claims 1 to 8, comprising the steps of:
1) assembling: measuring the size of the piezoelectric composite material, symmetrically adjusting the conductive rubber strip fixing grooves to keep the width of the conductive rubber strip fixing grooves consistent with that of the piezoelectric composite material, then installing the conductive rubber strip on the printed circuit board in parallel through bolts, and placing the conductive rubber strip in the conductive rubber strip fixing grooves; cutting a proper mask and sticking the mask on the front surface of the cover plate, blocking air holes exceeding the size range of the piezoelectric material, sticking the film temperature sensor on the cover plate, sticking the resistance-type heating film on the film temperature sensor, and placing the piezoelectric composite material on the cover plate to be in contact with the resistance-type heating film; adjusting a spiral fine-tuning structure to pre-tighten the piezoelectric composite material, connecting a vacuum air extractor to an air valve of a cover plate to start air extraction to enable the air valve to be in a negative pressure state, adjusting the spiral fine-tuning structure again to perform fine tuning, connecting the cover plate and a bottom plate through a positioning pin with threads and a red copper spring, sleeving the positioning pin with the red copper spring, placing a pressing block on the cover plate to be tightly pressed, and adjusting the spiral fine-tuning structure to perform fine tuning to enable the pressing block to be in close contact with the side face of the piezoelectric composite material;
2) checking the negative electrode connection: inserting a negative electrode detection finger-type electrode array of the printed circuit board into the detection clamping groove; starting a detection device, controlling a thyristor switching unit to disconnect a positive electrode and a negative electrode from a high-voltage amplifier, communicating the thyristor switching unit with a detection circuit, firstly detecting whether the positive electrode and the negative electrode of a printed circuit board are in a normal open circuit state or not by the detection circuit, if so, carrying out self-detection on the connection condition of a piezoelectric composite material and the negative electrode part of an interdigital electrode of the printed circuit board in the polarization device by the detection circuit, controlling an IO port to output a high level to the negative electrode of the interdigital electrode by a microprocessor in a controller, and calculating the connection quantity N1 of the negative electrodes in the piezoelectric composite material according to the level condition fed back to the IO port of the microprocessor by a negative electrode detection finger-shaped electrode array;
3) checking positive electrode connection: starting a detection circuit in the controller, firstly detecting whether the positive electrode and the negative electrode of the printed circuit board are in a normal open circuit state, if so, automatically detecting the connection condition of the piezoelectric composite material in the polarization device and the positive electrode part of the interdigital electrode of the printed circuit board by the detection circuit, controlling an IO port to output high level to the positive electrode of the interdigital electrode by a microprocessor in the controller, and then calculating the connection quantity N2 of the positive electrode in the piezoelectric composite material according to the level condition fed back to the IO port of the microprocessor by a positive electrode detection finger electrode array;
4) determining the connection condition: if the microprocessor in the controller calculates that | N1-N2| is less than or equal to 1, the structure of the piezoelectric composite material is complete and the connection with the polarizing device is normal, otherwise, the structure of the piezoelectric composite material is possible to have defects or the piezoelectric composite material is not completely connected with the polarizing device, and some electrodes are in a suspended state and need to be reassembled;
5) polarization risk test: after the piezoelectric composite material is determined to be normally connected with the polarization device, the detection device starts a polarization mode, controls the thyristor switching unit to be disconnected with the detection circuit, and respectively communicates the positive electrode and the negative electrode of the piezoelectric composite material with the positive electrode and the negative electrode of the high-voltage amplifier; the method comprises the steps that a microprocessor controls a polarization voltage output IO to output a quasi-polarization voltage V0, the quasi-polarization voltage is amplified by a high-voltage amplifier by n times to form a polarization voltage NV0, wherein the numerical value of NV0 is related to the length of a piezoelectric composite material, the quasi-polarization voltage NV0= 2.812X (KV) is determined according to the length L (mm) of the piezoelectric composite material, the microprocessor controls the IO port to output 120% NV0 polarization high voltage with 100HZ as a period in 3S, and whether breakdown risk exists is detected;
6) normal polarization: if the piezoelectric composite polarization device can normally work, the first polarization stage is carried out, the temperature is monitored by the detection device based on the film temperature sensor in a closed-loop control mode, the temperature of the resistance type heating film is controlled to be raised to the polarization temperature, and the piezoelectric composite polarization is carried out for 8min by the preset polarization voltage NV 0;
7) the polarization is completed.
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| CN116659758A (en) * | 2023-08-02 | 2023-08-29 | 烟台盈德精密机械有限公司 | Air-tightness test platform for air-driven urea nozzle |
| CN116659758B (en) * | 2023-08-02 | 2023-10-10 | 烟台盈德精密机械有限公司 | Air-tightness test platform for air-driven urea nozzle |
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