Intelligent temperature control electrical ceramic sintering device and method based on laser ultrasound

Abstract

The invention discloses an intelligent temperature control electrical ceramic sintering device and method based on laser ultrasound, and the device comprises a high-temperature sintering furnace which is provided with a transparent window; a signal generator; and the laser device is connected with the signal generator and is used for carrying out laser ultrasonic detection on the electrical ceramic product in the high-temperature sintering furnace by penetrating through the transparent window. The sintering state of the electrical ceramic product in the sintering process is obtained in real time through laser ultrasonic detection, the sintering temperature, the temperature rising speed and the duration time are intelligently regulated and controlled by comparing the target sintering state, and therefore the sintering consistency is improved, and the defective rate of the electrical ceramic product is reduced.

Description

Technical Field

[0001] The present invention belongs to the technical field of ceramic sintering, and in particular relates to an intelligent temperature-controlled electrical ceramic sintering device and method based on laser ultrasound. Background Art

[0002] Electrical ceramics play a vital supporting and insulating role in power systems. With the continuous increase in voltage levels of domestic power grids, the demand for high-performance, high-voltage electrical ceramics is growing. However, the production process involves a series of steps, including mixing, pressing, trimming, glazing, sintering, and gluing. Precision control of each step significantly impacts the quality of the ceramics. In large-scale production, even the slightest deviation in a single step can result in low-quality ceramics. Use of low-quality ceramics in power systems can cause serious power outages. Therefore, precise control of every production step is crucial.

[0003] The sintering process significantly impacts the density, mechanical strength, and other properties of electrical ceramics. Currently, the consistency of the sintering process is primarily controlled by setting a consistent sintering curve. This approach has certain drawbacks. If the temperature control accuracy of the sintering device or the initial environmental conditions change, the performance of the fired electrical ceramic product will deviate, potentially resulting in low-quality electrical ceramics. Therefore, there is an urgent need to design a sintering device and method that can effectively control the consistency of sintering quality and reduce the defective rate of electrical ceramics. Summary of the Invention

[0004] The present invention provides a laser-ultrasound-based intelligent temperature-controlled electrical ceramic sintering device and method, which are used to solve the technical problem that the performance of fired electrical ceramic products will deviate, which may lead to the production of low-quality electrical ceramics in severe cases.

[0005] In a first aspect, the present invention provides an intelligent temperature-controlled electrical ceramic sintering device based on laser ultrasound, comprising:

[0006] A high-temperature sintering furnace, wherein the high-temperature sintering furnace is provided with a transparent window;

[0007] a signal generator; and

[0008] A laser connected to the signal generator performs laser ultrasonic testing on the electrical ceramic product in the high-temperature sintering furnace by passing through the transparent window.

[0009] Furthermore, the signal generator is connected to the input end of the laser through a cable to provide an excitation signal for the laser.

[0010] Furthermore, the output end of the laser is perpendicular to the transparent window, and the laser and the transparent window do not contact each other.

[0011] Furthermore, the device further comprises a signal acquisition device, an input end of the signal acquisition device is perpendicular to the transparent window, and the signal acquisition device and the transparent window are not in contact with each other.

[0012] Furthermore, the output end of the signal acquisition device is connected to a computer via a cable, and the collected ultrasonic signals are converted into electrical signals and transmitted to the computer.

[0013] Furthermore, the output end of the computer is connected to the temperature control device via a cable, and the temperature adjustment instruction is sent to the temperature control device.

[0014] Furthermore, the temperature control device is connected to the high-temperature sintering furnace through a cable to control the sintering temperature, heating rate and duration of the high-temperature sintering furnace.

[0015] In a second aspect, the present invention provides a laser ultrasound-based intelligent temperature-controlled electrical ceramic sintering method, characterized in that it includes the following steps:

[0016] S1: A signal generator is used to generate a pulse signal, which is transmitted to the laser through a cable to power the laser, so that the laser generates a pulse laser signal;

[0017] S2: The laser shines vertically through the transparent window onto the surface of the electrical ceramic product being sintered. Due to the thermoelastic effect, the electrical ceramic product will generate an ultrasonic signal;

[0018] S3: The signal acquisition device extracts the ultrasonic signal generated by the electrical ceramic product and transmits it to the computer via a cable. The computer then performs spectrum analysis on the ultrasonic signal and uses the spectrum characteristics to reflect the current sintering state of the electrical ceramic product. The spectrum characteristics are compared with the target state to obtain the sintering temperature adjustment instruction.

[0019] S4: The computer sends the adjustment instructions to the temperature control device through the cable. The temperature control device adjusts the sintering temperature, heating rate and duration of the high-temperature sintering furnace according to the instructions.

[0020] The present application discloses an intelligent temperature-controlled electrical ceramic sintering device and method based on laser ultrasound. Laser ultrasonic detection is used to obtain the sintering status of electrical ceramic products in real time during the sintering process. The sintering temperature, heating rate, and duration are intelligently controlled by comparing the target sintering status, thereby improving sintering consistency and reducing the defective rate of electrical ceramic products. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following is a brief introduction to the drawings required for use in the description of the embodiments. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.

[0022] Figure 1 A schematic structural diagram of a laser-ultrasound-based intelligent temperature-controlled electrical ceramic sintering device provided in one embodiment of the present invention.

[0023] In the figure: 1. Signal generator; 2. Laser; 3. Transparent window; 4. Electrical ceramic product; 5. Signal acquisition device; 6. Computer; 7. Temperature control device; 8. High-temperature sintering furnace. DETAILED DESCRIPTION

[0024] To make the objectives, technical solutions, and advantages of the embodiments of the present invention more clear, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. All other embodiments obtained by ordinary technicians in this field based on the embodiments of the present invention without making any creative efforts shall fall within the scope of protection of the present invention.

[0025] See also Figure 1 , which shows an intelligent temperature-controlled electrical ceramic sintering device based on laser ultrasound, including:

[0026] A high-temperature sintering furnace 8 is provided with a transparent window 3;

[0027] a signal generator 1; and

[0028] The laser 2 connected to the signal generator 1 performs laser ultrasonic testing on the electrical ceramic product 4 in the high-temperature sintering furnace 8 by passing through the transparent window 3 .

[0029] Furthermore, the signal generator 1 is connected to the input end of the laser 2 via a cable to provide an excitation signal to the laser 2 .

[0030] Furthermore, the output end of the laser 2 is perpendicular to the transparent window 3, and the laser 2 and the transparent window 3 do not contact each other.

[0031] Furthermore, the device further comprises a signal acquisition device 5 , the input end of the signal acquisition device 5 is perpendicular to the transparent window 3 , and the signal acquisition device 5 and the transparent window 3 do not contact each other.

[0032] Furthermore, the output end of the signal acquisition device 5 is connected to the computer 6 via a cable, and the collected ultrasonic signal is converted into an electrical signal and transmitted to the computer 6 .

[0033] Furthermore, the output end of the computer 6 is connected to the temperature control device 7 via a cable, and the temperature adjustment instruction is sent to the temperature control device 7.

[0034] Furthermore, the temperature control device 7 is connected to the high-temperature sintering furnace 8 via a cable to control the sintering temperature, heating rate and duration of the high-temperature sintering furnace 8 .

[0035] In this embodiment, a signal generator 1 generates a pulse signal, which is transmitted via a cable to a laser 2, powering the laser 2 and causing it to generate a pulsed laser signal. The laser light passes through a transparent window 3 and vertically irradiates the surface of the sintering electrical ceramic product 4. Due to the thermoelastic effect, the electrical ceramic product 4 generates an ultrasonic signal. A signal acquisition device 5 extracts the ultrasonic signal generated by the electrical ceramic product 4 and transmits it via a cable to a computer 6, which performs spectral analysis on the ultrasonic signal. The spectral characteristics reflect the current sintering state of the electrical ceramic product 4, which is compared with the target state to obtain a sintering temperature adjustment instruction. The computer 6 transmits the adjustment instruction via a cable to a temperature control device 7, which adjusts the sintering temperature, heating rate, and duration of the high-temperature sintering furnace 8 according to the instruction.

[0036] A laser ultrasonic-based intelligent temperature-controlled electrical ceramic sintering method comprises the following steps:

[0037] S1: A pulse signal is generated by signal generator 1 and transmitted to laser 2 via a cable to power laser 2, so that laser 2 generates a pulse laser signal;

[0038] S2: The laser is irradiated vertically through the transparent window 3 onto the surface of the electrical ceramic product 4 being sintered. Due to the thermoelastic effect, the electrical ceramic product 4 will generate an ultrasonic signal;

[0039] S3: The signal acquisition device 5 extracts the ultrasonic signal generated by the electrical ceramic product 4 and transmits it to the computer 6 via a cable. The computer 6 performs spectrum analysis on the ultrasonic signal and uses the spectrum characteristics to reflect the current sintering state of the electrical ceramic product 4. The spectrum characteristics are compared with the target state to obtain a sintering temperature adjustment instruction.

[0040] S4: The computer 6 sends the adjustment instructions to the temperature control device 7 through the cable. The temperature control device 7 adjusts the sintering temperature, heating rate and duration of the high-temperature sintering furnace 8 according to the instructions.

[0041] The method of this embodiment uses laser ultrasonic detection to achieve real-time acquisition of the sintering status of electrical ceramic products during the sintering process. By comparing the target sintering status, the sintering temperature, heating rate and duration are intelligently controlled, thereby improving the sintering consistency and reducing the defective rate of electrical ceramic products.

[0042] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the various embodiments of the present invention.

Claims

1. An intelligent temperature-controlled electrical ceramic sintering device based on laser ultrasound, characterized in that: include: A high-temperature sintering furnace (8), wherein the high-temperature sintering furnace (8) is provided with a transparent window (3); Signal generator (1); as well as A laser (2) connected to the signal generator (1) performs laser ultrasonic testing on the electrical ceramic product (4) in the high-temperature sintering furnace (8) by passing through the transparent window (3).

2. The laser ultrasonic-based intelligent temperature-controlled electrical ceramic sintering device according to claim 1, characterized in that: The signal generator (1) is connected to the input end of the laser (2) via a cable to provide an excitation signal for the laser (2).

3. The laser ultrasonic-based intelligent temperature-controlled electrical ceramic sintering device according to claim 1, characterized in that: The output end of the laser (2) is perpendicular to the transparent window (3), and the laser (2) and the transparent window (3) do not contact each other.

4. The laser ultrasonic-based intelligent temperature-controlled electrical ceramic sintering device according to claim 1, characterized in that: The device further comprises a signal acquisition device (5), the input end of the signal acquisition device (5) is perpendicular to the transparent window (3), and the signal acquisition device (5) and the transparent window (3) do not contact each other.

5. The laser ultrasonic-based intelligent temperature-controlled electrical ceramic sintering device according to claim 4, characterized in that: The output end of the signal acquisition device (5) is connected to a computer (6) via a cable, and the acquired ultrasonic signals are converted into electrical signals and transmitted to the computer (6).

6. The laser ultrasonic-based intelligent temperature-controlled electrical ceramic sintering device according to claim 1, characterized in that: The output end of the computer (6) is connected to the temperature control device (7) via a cable, and the temperature adjustment instruction is sent to the temperature control device (7).

7. The laser-ultrasound-based intelligent temperature-controlled electrical ceramic sintering device according to claim 6, characterized in that: The temperature control device (7) is connected to the high-temperature sintering furnace (8) via a cable to control the sintering temperature, heating rate and duration of the high-temperature sintering furnace (8).

8. A laser ultrasonic-based intelligent temperature-controlled electrical ceramic sintering method, characterized in that: The steps include: S1: A signal generator (1) is used to generate a pulse signal, which is transmitted to a laser (2) via a cable to power the laser (2), so that the laser (2) generates a pulse laser signal; S2: The laser is irradiated vertically through the transparent window (3) onto the surface of the electrical ceramic product (4) being sintered. Due to the thermoelastic effect, the electrical ceramic product (4) will generate an ultrasonic signal; S3: The signal acquisition device (5) extracts the ultrasonic signal generated by the electrical ceramic product (4), transmits it to the computer (6) via a cable, performs spectrum analysis on the ultrasonic signal, and reflects the current sintering state of the electrical ceramic product (4) through the spectrum characteristics, compares it with the target state, and obtains the sintering temperature adjustment instruction; S4: The computer (6) sends the adjustment instructions to the temperature control device (7) through the cable, and the temperature control device (7) adjusts the sintering temperature, heating rate and duration of the high-temperature sintering furnace (8) according to the instructions.

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