CN111829466A - High-temperature electromagnetic ultrasonic thickness measuring probe - Google Patents
High-temperature electromagnetic ultrasonic thickness measuring probe Download PDFInfo
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- CN111829466A CN111829466A CN202010771966.0A CN202010771966A CN111829466A CN 111829466 A CN111829466 A CN 111829466A CN 202010771966 A CN202010771966 A CN 202010771966A CN 111829466 A CN111829466 A CN 111829466A
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- connecting rod
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
- G01B17/00—Measuring arrangements characterised by the use of infrasonic, sonic or ultrasonic vibrations
- G01B17/02—Measuring arrangements characterised by the use of infrasonic, sonic or ultrasonic vibrations for measuring thickness
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- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- H05K7/00—Constructional details common to different types of electric apparatus
- H05K7/20—Modifications to facilitate cooling, ventilating, or heating
- H05K7/20536—Modifications to facilitate cooling, ventilating, or heating for racks or cabinets of standardised dimensions, e.g. electronic racks for aircraft or telecommunication equipment
- H05K7/20627—Liquid coolant without phase change
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- Microelectronics & Electronic Packaging (AREA)
- General Physics & Mathematics (AREA)
- Investigating Or Analyzing Materials By The Use Of Ultrasonic Waves (AREA)
- Length Measuring Devices Characterised By Use Of Acoustic Means (AREA)
Abstract
The invention discloses a high-temperature electromagnetic ultrasonic thickness measuring probe, relates to the technical field of electromagnetic ultrasonic nondestructive testing, and is used for solving the technical problem that the conventional electromagnetic ultrasonic probe cannot work in a high-temperature environment for a long time. In the high-temperature electromagnetic ultrasonic thickness measuring probe, an electromagnetic coil is arranged on the outer side of a permanent magnet and connected with an ultrasonic joint through a lead, a connecting rod connected with the ultrasonic joint is arranged on the outer side of the lead, a handle is arranged on the outer side of the connecting rod, a control circuit board is arranged in the handle and connected with a plug and a temperature sensor, the plug is positioned on the outer side of the handle, and the temperature sensor is positioned in the handle and connected with the connecting rod; the connecting rod is connected with the shell body through the enclosing cover, and interior casing and inner cup are equipped with to the inside of shell body, and permanent magnet and solenoid are located the inside of casing in, and have the circulation water course between interior casing and inner cup and shell body and the enclosing cover, and the circulation water course leads to pipe intercommunication to have the water tank, and the water tank is equipped with the water pump.
Description
Technical Field
The invention relates to the technical field of electromagnetic ultrasonic nondestructive testing, in particular to a high-temperature electromagnetic ultrasonic thickness measuring probe.
Background
Compared with the traditional piezoelectric ultrasonic detection technology, the electromagnetic ultrasonic detection technology has the advantages of non-contact, no need of a coupling agent, capability of exciting various detection waveforms by changing the shape of a coil, and suitability for various detection occasions.
Wall thickness measurement is a commonly adopted detection means in pressure-bearing special equipment detection, and for a high-temperature pressure container, because the high-temperature pressure container works in a harsh service environment for a long time, failure modes such as material sharpening, creep cracking and creep fatigue fracture are likely to occur. Therefore, the strengthening of the wall thickness measurement of the high-temperature pressure vessel is of great significance for guaranteeing the safe operation of the high-temperature pressure vessel.
At present, in the prior art, an electromagnetic ultrasonic probe capable of working in a high-temperature environment for a long time is still lacked. For example: the device can continuously work for 0.5 hour at the temperature of 500 ℃ and is used for continuously measuring the wall thickness of a high-temperature container or pipeline; or, the device can continuously work at the temperature of 300 ℃ for a long time and is used for long-term monitoring of the wall thickness of a high-temperature pipeline or a high-temperature container.
Therefore, how to provide a high-temperature electromagnetic ultrasonic thickness measurement probe, which can stably operate in a high-temperature environment for a long time and can send out an over-temperature alarm to avoid the damage of the probe becomes a technical problem to be solved by the technical staff in the field.
Disclosure of Invention
The invention aims to provide a high-temperature electromagnetic ultrasonic thickness measuring probe, which is used for solving the technical problem that the existing electromagnetic ultrasonic probe cannot work in a high-temperature environment for a long time.
In order to achieve the purpose, the invention adopts the following technical scheme:
a high temperature electromagnetic ultrasonic thickness measurement probe, comprising: the electromagnetic coil is arranged on the outer side of the permanent magnet and connected with an ultrasonic joint through a wire, a connecting rod connected with the ultrasonic joint is arranged on the outer side of the wire, a handle is arranged on the outer side of the connecting rod, a control circuit board is arranged in the handle and connected with a plug and a temperature sensor, the plug is located on the outer side of the handle, and the temperature sensor is located in the handle and connected with the connecting rod;
the connecting rod is connected with the shell body through the enclosing cover, interior casing and inner cup are equipped with in the inside of shell body, the permanent magnet with solenoid is located the inside of interior casing, just interior casing reaches the inner cup with the shell body reaches circulation water course has between the enclosing cover, circulation water course leads to pipe intercommunication and has the water tank, the water tank is equipped with the water pump.
Wherein, the inner cup with through threaded connection between the interior casing, just the screw thread department scribbles waterproof glue.
The outer cover is connected with the outer shell through threads, and waterproof glue is coated at the threads.
Specifically, the inner cup is equipped with the pin hole, the pin hole is used for drawing forth the wire, just the pin hole scribbles waterproof glue and seals.
Specifically, the outer cover is provided with a center hole, the center hole is used for leading out the lead, and the center hole is coated with waterproof glue for sealing.
In practical application, the connecting rod is made of stainless steel materials and used for reducing the temperature at the position of the temperature sensor, and the temperature sensor is fixed with the connecting rod in a sticking mode; one end of the connecting rod is connected with the outer cover through threads, and the other end of the connecting rod is welded with the ultrasonic joint.
Wherein the handle is made of rubber material; the inner cover, the outer cover, the inner shell and the outer shell are all made of stainless steel materials; the electromagnetic coil is made of enameled wires, and the electromagnetic coil is connected with the conducting wire through brazing; the permanent magnet is made of high-temperature-resistant samarium cobalt materials.
Specifically, the control circuit board includes: the temperature sensor comprises a sensor chip connected with the temperature sensor, a single chip microcomputer chip, an EEPROM chip, a buzzer, a resistor and a capacitor auxiliary element; a ground signal GND in the control circuit board and an interface P2.0 of the single chip microcomputer chip are connected with the plug and used for outputting the compensated ultrasonic sound velocity; the upper limit of the working temperature allowed by the electromagnetic ultrasonic probe is stored in the single chip, and when the temperature of the probe exceeds the upper limit, the buzzer gives an alarm.
Further, a steel plate with a known thickness is heated in a temperature control box, the transverse wave sound velocity values at different temperatures are measured in a heat preservation state, a functional relation between the sound velocity and the temperature is established, the relation is stored in the single chip microcomputer chip, the temperature value of the lower end part of the electromagnetic ultrasonic probe is obtained according to the temperature value detected by the temperature sensor, and the sound velocity value at the temperature is output.
Still further, a functional relationship between speed of sound and temperature is established: the fitting relation of the sound speed C and the temperature T is C =3229-1.22486 × T.
Compared with the prior art, the high-temperature electromagnetic ultrasonic thickness measuring probe has the following advantages:
in the high-temperature electromagnetic ultrasonic thickness measuring probe provided by the invention, because the circulating water channel is arranged between the inner shell and the inner cover and between the outer shell and the outer cover, and the circulating water channel is communicated with the water tank provided with the water pump through the water pipe, when the cooling water flows in the circulating water channel through the external water pump and the water tank, the long-term stable operation of the electromagnetic ultrasonic thickness measuring probe in a high-temperature environment can be effectively ensured; and because the temperature sensor connected with the control circuit board is arranged at the connecting rod to measure the temperature of the ultrasonic joint part, the control circuit board can send out an overtemperature alarm before the temperature exceeds a bearing range, so that the probe can be immediately removed from the detected object, and the phenomenon that the probe is damaged can be effectively avoided.
Drawings
Fig. 1 is a schematic structural diagram of a high-temperature electromagnetic ultrasonic thickness measurement probe according to an embodiment of the present invention;
fig. 2 is a circuit diagram of a temperature control system of a high-temperature electromagnetic ultrasonic thickness measurement probe according to an embodiment of the present invention;
fig. 3 is a transverse wave sound velocity fitting result diagram of the high-temperature electromagnetic ultrasonic thickness measurement probe according to the embodiment of the invention.
Reference numerals:
1-a permanent magnet; 2-circulating water channels; 3-inner cover; 4-an outer cover; 5-an inner housing; 6-outer shell; 7-a water pipe; 8-a water pump; 9-a water tank; 10-an electromagnetic coil; 11-a connecting rod; 12-a wire; 13-a handle; 14-an ultrasonic joint; 15-a plug; 16-a control circuit board; 17-temperature sensor.
Detailed Description
For the convenience of understanding, the high-temperature electromagnetic ultrasonic thickness measuring probe provided by the embodiment of the invention is described in detail below with reference to the attached drawings in the specification.
The embodiment of the invention provides a high-temperature electromagnetic ultrasonic thickness measuring probe, as shown in fig. 1, comprising: the electromagnetic heating device comprises a permanent magnet 1, wherein an electromagnetic coil 10 is arranged on the outer side of the permanent magnet 1, the electromagnetic coil 10 is connected with an ultrasonic connector 14 through a lead 12, a connecting rod 11 connected with the ultrasonic connector 14 is arranged on the outer side of the lead 12, a handle 13 is arranged on the outer side of the connecting rod 11, a control circuit board 16 is arranged in the handle 13, the control circuit board 16 is connected with a plug 15 and a temperature sensor 17, the plug 15 is positioned on the outer side of the handle 13, and the temperature sensor 17 is positioned in the handle 13 and connected;
connecting rod 11 is connected with shell body 6 through enclosing cover 4, and shell body 6's inside is equipped with interior casing 5 and inner cup 3, and permanent magnet 1 and solenoid 10 are located the inside of interior casing 5, and have circulation water course 2 between interior casing 5 and inner cup 3 and shell body 6 and the enclosing cover 4, and 2 water pipes 7 intercommunications of circulation water course have water tank 9, and water tank 9 is equipped with water pump 8.
Compared with the prior art, the high-temperature electromagnetic ultrasonic thickness measuring probe provided by the embodiment of the invention has the following advantages:
in the high-temperature electromagnetic ultrasonic thickness measuring probe provided by the embodiment of the invention, because the circulating water channel 2 is arranged between the inner shell 5 and the inner cover 3 and between the outer shell 6 and the outer cover 4, and the circulating water channel 2 is communicated with the water tank 9 provided with the water pump 8 through the water pipe 7, when the cooling water flows in the circulating water channel 2 through the external water pump 8 and the water tank 9, the long-term stable operation of the electromagnetic ultrasonic thickness measuring probe in a high-temperature environment can be effectively ensured; moreover, because the temperature sensor 17 connected with the control circuit board 16 is arranged at the connecting rod 11 to measure the temperature of the ultrasonic joint 14, the control circuit board 16 can send out an overtemperature alarm before the temperature exceeds a bearing range, so that the phenomenon that the probe is damaged can be effectively avoided by immediately removing the probe from the detected object.
Wherein, can pass through threaded connection between above-mentioned inner cup 3 and the interior casing 5, and this screw thread department can scribble the waterproof glue to play sealed effect through the waterproof glue, and then accomplish that inner cup 3 and interior casing 5 after the assembly can be rather than the outside circulating water channel 2 between keep apart completely.
Wherein, can pass through threaded connection between above-mentioned enclosing cover 4 and the shell body 6, and this screw thread department can scribble the waterproof glue to play sealed effect through the waterproof glue, and then prevent that its inside circulating water 2's water from flowing out between the connecting thread.
Specifically, as shown in fig. 1, the inner cover 3 may be provided with a lead hole through which the lead wire 12 can be led out, and the lead hole may be coated with a waterproof adhesive to be sealed, thereby effectively preventing water in the circulation water passage 2 from entering the inner housing 5 through the inner cover 3.
Specifically, as shown in fig. 1, the outer cover 4 may be provided with a central hole through which the lead 12 can be led out, and the central hole may be coated with a waterproof adhesive to seal, thereby effectively preventing water in the circulating water passage 2 from flowing out of the outer housing 6 through the outer cover 4.
In practical applications, the connecting rod 11 may preferably be made of stainless steel, so as to effectively reduce the temperature at the position of the temperature sensor 17, and the temperature sensor 17 may be fixed to the connecting rod 11 by means of adhesion.
Alternatively, the connecting rods 11 of different lengths are selected according to the temperature range of the detection object. Specifically, the temperature of the object to be detected may reach 500 ℃, the temperature sensor 17 may not work at such a high temperature, and the temperature at the position of the temperature sensor 17 can be effectively reduced by using the connecting rod 11 (of stainless steel).
Moreover, after the whole probe system works stably, the temperature of the position of the temperature sensor 17 and the actual temperature of the lower end of the ultrasonic joint 14 are balanced, and the relationship between the temperature of the position of the temperature sensor 17 and the actual temperature of the lower end of the ultrasonic joint 14 can be predetermined by adopting a calibration method, so that the temperature value of the lowest end of the ultrasonic joint 14 can be obtained after the temperature of the temperature sensor 17 is measured, and the temperature control of the probe is realized.
In actual assembly, one end of the connecting rod 11 may be connected to the outer cap 4 by a screw thread, and the other end may be welded to the ultrasonic joint 14.
Wherein, the handle 13 can be made of rubber material; the inner cover 3, the outer cover 4, the inner shell 5 and the outer shell 6 can be made of stainless steel materials; the electromagnetic coil 10 can be made of enameled wires, and the electromagnetic coil 10 and the lead 12 can be connected by brazing; the permanent magnet 1 can be made of a high-temperature-resistant samarium cobalt material.
Specifically, as shown in fig. 2, the control circuit board 16 may include: an ADT7422 sensor chip connected with the temperature sensor 17, an STC12LE5A60S2 singlechip chip, an AT24C02 EEPROM chip, a buzzer, a resistor, a capacitor and other auxiliary elements.
Specifically, as shown in fig. 2 in conjunction with fig. 1, the ground signal GND in the control circuit board 16 and the interface P2.0 of the (STC 12LE5a60S 2) one-chip microcomputer chip may be connected to the above-mentioned plug 15 for outputting the compensated ultrasonic sound velocity; in addition, the upper limit of the working temperature allowed to be used by the electromagnetic ultrasonic probe can be stored in the single chip microcomputer chip (STC 12LE5A60S 2), and when the temperature of the probe exceeds the upper limit, the buzzer gives an alarm, so that the probe is required to be removed from the detected object immediately.
It should be added here that eeprom (electrically Erasable Programmable read only memory) refers to a charged Erasable Programmable read only memory; the memory chip is a memory chip with no data loss after power failure. EEPROM can erase the existing information on computer or special equipment, and reprogram; and, it is generally used for plug and play.
Further, a steel plate with a known thickness is heated in a temperature control box, the transverse wave sound velocity values at different temperatures are measured in a heat preservation state, a functional relation between the sound velocity and the temperature is established, the relation is stored in a (STC 12LE5A60S 2) single chip, the temperature value of the lower end part of the electromagnetic ultrasonic probe is obtained according to the temperature value detected by the temperature sensor 17, and the sound velocity value at the temperature is output.
Still further, establishing a functional relationship between the sound velocity and the temperature as: the fitting relationship of the sound speed C to the temperature T, C =3229-1.22486 × T, is shown in fig. 3.
Therefore, the high-temperature electromagnetic ultrasonic thickness measuring probe provided by the embodiment of the invention has a sound velocity compensation function in a high-temperature state, and can correct the transverse wave sound velocity according to the temperature change of the detected object, so that the thickness measurement precision is effectively improved; and moreover, fitting results of sound velocities under different temperature conditions are pre-stored in the single chip microcomputer control system, and corresponding transverse wave sound velocities can be output according to the temperature of the probe, so that the accuracy of a thickness measurement result is further improved.
The working process of the high-temperature electromagnetic ultrasonic thickness measuring probe provided by the embodiment of the invention can be as follows:
firstly, a high-temperature electromagnetic ultrasonic thickness measuring probe is connected with an electromagnetic ultrasonic thickness measuring instrument host:
the ultrasonic connector 14 is connected with a transmitting and receiving circuit of a host, the inside of the ultrasonic connector 14 is connected with the lead 12 through soldering, and the lead 12 is connected with the electromagnetic coil 10 through soldering; a transmitting circuit of the electromagnetic ultrasonic thickness gauge main machine loads a high-voltage transmitting signal to the electromagnetic coil 10 to generate an ultrasonic transmitting signal, and a receiving circuit receives and amplifies a reflecting signal of the electromagnetic coil 10; the control system of the electromagnetic ultrasonic thickness gauge calculates the time interval between the transmitting signal and the reflecting signal, and calculates the thickness of the material under the condition that the sound velocity of the detected material is known; the plug 15 is connected with a control circuit of the electromagnetic ultrasonic thickness gauge host, and the plug 15 is connected with a control circuit board 16 and a temperature sensor 17 through leads;
secondly, probe calibration:
heating and preserving heat of a carbon steel standard test block with the thickness of 50mm in a temperature control box, starting a water pump 8 to cool a probe system, heating the carbon steel standard test block from 20 ℃ to 450 ℃ by the temperature control box, preserving heat at different temperature values, reading the temperature value of a temperature sensor 17 by using a control circuit board 16, sending the temperature value to an electromagnetic ultrasonic thickness gauge host to display the temperature value, and measuring the thickness value of a 50mm workpiece at the temperature by the electromagnetic ultrasonic thickness gauge host; due to the cooling isolation effect of the connecting rod 11, the temperature value measured by the temperature sensor 17 and the temperature value of the detected workpiece have a temperature difference, but a linear function relationship exists between the temperature value and the temperature value, the relationship is stored in the control circuit board 16, and the temperature value output by the control circuit board 16 after compensation processing represents the temperature value of the detected workpiece; recording the thickness value D of the carbon steel standard test block with the thickness of 50mm measured by the electromagnetic ultrasonic thickness gauge host under the condition of different temperature values, wherein the thickness value D is continuously reduced as the sound velocity value of ultrasonic transverse waves is reduced along with the rise of the temperature of the detected sample, and knowing that the sound velocity of the transverse waves at 15 ℃ is 3230m/s and D/50= C/3230, the sound velocity values of the transverse waves at different temperatures, namely the circular data points in the graph 3, can be calculated; the different temperature shear wave sound velocity values and the temperature values have a linear function relationship, the relationship between the two obtained by using a data fitting method is C =3229-1.22486 multiplied by T, and the relationship is stored in the control circuit board 16; finally, when the temperature sensor 17 measures the temperature value at the tail end of the connecting rod 11, the temperature T of the detected sample can be obtained, the sound velocity C of the detected sample at the temperature T is finally obtained, and the sound velocity C is output to the host computer of the electromagnetic ultrasonic thickness gauge;
thirdly, starting detection:
connecting the high-temperature electromagnetic ultrasonic thickness measuring probe with an electromagnetic ultrasonic thickness measuring instrument host, starting a water pump 8 to enable cooling water in a water tank 9 and a circulating water channel 2 to start flowing, enabling an ultrasonic joint 14 to be close to a detected material, and outputting the temperature of the detected material and the compensated transverse wave sound velocity to the electromagnetic ultrasonic thickness measuring instrument host by a control circuit board 16 to perform thickness detection; when the ultrasonic probe works for a long time, when the temperature of the lower bottom surface of the ultrasonic joint 14 exceeds the upper limit of the allowable use temperature, the buzzer in the control circuit board 16 gives an alarm, the probe is required to be stopped to be used at the moment, and the ultrasonic probe continues to work after the cooling system of the probe is fully cooled.
In summary, the high-temperature electromagnetic ultrasonic thickness measurement probe provided by the embodiment of the invention mainly has the following advantages:
when cooling water flows through a circulating water channel by externally arranging a water pump and a water tank, the long-term stable operation of the electromagnetic ultrasonic probe in a high-temperature environment can be effectively ensured;
secondly, the control circuit board can send out an overtemperature alarm before the temperature exceeds a bearing range, so that the phenomenon that the probe is damaged is effectively avoided;
thirdly, the sound velocity compensation function in a high-temperature state is achieved, the transverse wave sound velocity can be corrected according to the temperature change of the detected object, and the thickness measurement precision is effectively improved;
and fourthly, fitting results of sound velocities under different temperature conditions are pre-stored in the thickness measuring device, and corresponding transverse wave sound velocities can be output according to the temperature of the probe, so that the accuracy of the thickness measuring result is further improved.
The above description is only for the specific embodiments of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art can easily conceive of the changes or substitutions within the technical scope of the present invention, and all the changes or substitutions should be covered within the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the appended claims.
Claims (10)
1. A high temperature electromagnetic ultrasonic thickness measurement probe, comprising: the electromagnetic coil is arranged on the outer side of the permanent magnet and connected with an ultrasonic joint through a wire, a connecting rod connected with the ultrasonic joint is arranged on the outer side of the wire, a handle is arranged on the outer side of the connecting rod, a control circuit board is arranged in the handle and connected with a plug and a temperature sensor, the plug is located on the outer side of the handle, and the temperature sensor is located in the handle and connected with the connecting rod;
the connecting rod is connected with the shell body through the enclosing cover, interior casing and inner cup are equipped with in the inside of shell body, the permanent magnet with solenoid is located the inside of interior casing, just interior casing reaches the inner cup with the shell body reaches circulation water course has between the enclosing cover, circulation water course leads to pipe intercommunication and has the water tank, the water tank is equipped with the water pump.
2. The high-temperature electromagnetic ultrasonic thickness measuring probe according to claim 1, wherein the inner cover and the inner shell are connected by a screw thread, and a waterproof glue is coated at the screw thread.
3. The high-temperature electromagnetic ultrasonic thickness measuring probe according to claim 1 or 2, wherein the outer cover is connected with the outer shell through a thread, and a waterproof adhesive is coated at the thread.
4. The high-temperature electromagnetic ultrasonic thickness measuring probe according to claim 1 or 2, wherein the inner cover is provided with a lead hole for leading out the lead, and the lead hole is coated with waterproof glue for sealing.
5. The high-temperature electromagnetic ultrasonic thickness measuring probe according to claim 3, wherein the outer cover is provided with a central hole for leading out the lead, and the central hole is coated with a waterproof glue for sealing.
6. The high-temperature electromagnetic ultrasonic thickness measuring probe according to claim 1, wherein the connecting rod is made of stainless steel material for reducing the temperature at the position of the temperature sensor, and the temperature sensor is fixed with the connecting rod in a sticking manner;
one end of the connecting rod is connected with the outer cover through threads, and the other end of the connecting rod is welded with the ultrasonic joint.
7. The high-temperature electromagnetic ultrasonic thickness measuring probe according to claim 1 or 6, wherein the handle is made of a rubber material;
the inner cover, the outer cover, the inner shell and the outer shell are all made of stainless steel materials;
the electromagnetic coil is made of enameled wires, and the electromagnetic coil is connected with the conducting wire through brazing;
the permanent magnet is made of high-temperature-resistant samarium cobalt materials.
8. The high temperature electromagnetic ultrasonic thickness measuring probe of claim 1, wherein the control circuit board comprises: the temperature sensor comprises a sensor chip connected with the temperature sensor, a single chip microcomputer chip, an EEPROM chip, a buzzer, a resistor and a capacitor auxiliary element;
a ground signal GND in the control circuit board and an interface P2.0 of the single chip microcomputer chip are connected with the plug and used for outputting the compensated ultrasonic sound velocity;
the upper limit of the working temperature allowed by the electromagnetic ultrasonic probe is stored in the single chip, and when the temperature of the probe exceeds the upper limit, the buzzer gives an alarm.
9. The high-temperature electromagnetic ultrasonic thickness measuring probe according to claim 8, wherein a steel plate of known thickness is heated in a temperature control box, the sound velocity values of the transverse waves at different temperatures are measured in a heat preservation state, a functional relationship between the sound velocity and the temperature is established, the relationship is stored in the single chip microcomputer chip, the temperature value of the lower end part of the electromagnetic ultrasonic probe is obtained according to the temperature value detected by the temperature sensor, and the sound velocity value at the temperature is output.
10. A high temperature electromagnetic ultrasonic thickness measuring probe according to claim 9, wherein a functional relationship between speed of sound and temperature is established:
the fitting relation of the sound speed C and the temperature T is C =3229-1.22486 × T.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202010771966.0A CN111829466A (en) | 2020-08-04 | 2020-08-04 | High-temperature electromagnetic ultrasonic thickness measuring probe |
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| CN202010771966.0A CN111829466A (en) | 2020-08-04 | 2020-08-04 | High-temperature electromagnetic ultrasonic thickness measuring probe |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114371221A (en) * | 2022-01-10 | 2022-04-19 | 哈尔滨工业大学 | Electromagnetic ultrasonic transducer with ultra-high temperature resistant double-coil structure |
-
2020
- 2020-08-04 CN CN202010771966.0A patent/CN111829466A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114371221A (en) * | 2022-01-10 | 2022-04-19 | 哈尔滨工业大学 | Electromagnetic ultrasonic transducer with ultra-high temperature resistant double-coil structure |
| CN114371221B (en) * | 2022-01-10 | 2023-10-03 | 哈尔滨工业大学 | Electromagnetic ultrasonic transducer with ultra-high temperature resistant double-coil structure |
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